LC-20AD / AB SERVICE MANUAL

LC-20AD / AB SERVICE MANUAL
228-90159
SOLVENT DELIVERY MODULE FOR
SHIMADZU HIGH PERFORMANCE LIQUID
CHROMATOGRAPH
LC-20AD / AB
SERVICE MANUAL
CAUTION
This service manual has been edited for those that have received service related
training.
Those that have not been trained, should not use this manual.
Analytical & Measuring Instruments Division
Table of Contents
Table of Contents
CHAPTER 1: INTRODUCTION.............................................1-1
CHAPTER 2: SAFETY INSTRUCTIONS ..............................2-1
2.1 Work Safety Instructions.......................................................................2-1
2.1.1 Safety Instructions Related to Application.......................................................... 2-1
2.1.2 Safety Instructions Related to Installation Location ........................................... 2-2
2.1.3 Safety Instructions Related to Installation Work................................................. 2-3
2.1.4 Safety Instructions Related to Work and Operation............................................ 2-5
2.1.5 Safety Instructions Related to Inspection, Maintenance, and Servicing ............. 2-6
2.2 Safety Instructions Related to Static Electricity ...................................2-7
2.2.1 Events leading to static electricity accidents (typical examples) ........................ 2-7
2.2.2 Preventing Static Electricity Accidents............................................................... 2-8
2.2.2.1 Preventive Measure 1............................................................................................ 2-8
2.2.2.2 Preventive Measure 2............................................................................................ 2-9
2.2.2.3 Preventive Measure 3............................................................................................ 2-9
2.2.2.4 Preventive Measure 4............................................................................................ 2-9
2.2.2.5 Preventive Measure 5............................................................................................ 2-9
2.3 Cautions for Mobile Phase Selection and Use ....................................2-10
2.4 Warning Labels ................................................................................... 2-11
CHAPTER 3: SPECIFICATIONS ..........................................3-1
3.1 Specifications of LC-20AD as Individual Module ...............................3-1
3.2 LC-20AD: High-pressure Gradient System..........................................3-2
3.3 LC-20AD: Low-pressure Gradient System...........................................3-3
3.4 Specifications of LC-20AB as Individual Module ...............................3-4
3.5 LC-20AB: High-pressure Gradient System ..........................................3-5
3.6 Operating Principle ...............................................................................3-5
CHAPTER 4: NAMES OF PARTS.........................................4-1
4.1 Front ......................................................................................................4-1
4.2 Behind Front Cover...............................................................................4-1
4.3 Back ......................................................................................................4-2
4.4 Interior...................................................................................................4-2
4.5 Flow-line Diagram ................................................................................4-4
4.6 Pump Assembly ....................................................................................4-6
CHAPTER 5: ASSEMBLY AND DISASSEMBLY..................5-1
5.1 Handling the Carrier Liquid..................................................................5-1
5.1.1 Rinsing the Pump................................................................................................ 5-1
5.1.2 Rinsing When Using Buffer Solution as Carrier Liquid ..................................... 5-1
5.1.3 Rinsing When Using Halogenated Organic Solvent ........................................... 5-2
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Table of Contents
5.1.4 Replacing the Carrier Liquid .............................................................................. 5-2
5.1.5 Degassing the Solvent ........................................................................................ 5-2
5.1.6 Not Using the Pump for Long Periods ............................................................... 5-3
5.2 Structure and Maintenance of Flow-line Parts ..................................... 5-3
5.2.1 Plumbing Inlet (Plumbing-inlet Assembly, P/N 228-18648) .............................. 5-3
5.2.2 Suction-filter Assembly (P/N 228-39181-95)..................................................... 5-4
5.2.2.1 Assembly Diagram for Plumbing Parts .................................................................5-4
5.2.2.2 Inspection ..............................................................................................................5-4
5.2.2.3 Cleaning and Replacement ....................................................................................5-5
5.2.3 Check Valves ...................................................................................................... 5-5
5.2.3.1 Check Valve IN Assembly (P/N 228-45557-91)....................................................5-5
5.2.3.2 Check Valve OUT Assembly (P/N 228-45563-95)................................................5-6
5.2.3.3 Housing A (P/N 228-42184)..................................................................................5-6
5.2.3.4 Housing B (P/N 228-42185)..................................................................................5-7
5.2.3.5 Disassembly and Inspection ..................................................................................5-7
5.2.4 Replacing Plunger Seals, Pump Heads, Plungers, and Diaphragms................... 5-8
5.2.5 Pressure Sensor Assembly (P/N 228-45552-95)................................................. 5-9
5.2.5.1 Replacement..........................................................................................................5-9
5.2.5.2 Line Filter............................................................................................................5-10
5.2.5.3 Drain-valve Assembl Assy (P/N 228-45574-91) .................................................5-10
5.2.6 Pump Assembly (P/N 228-45550-99)................................................................5-11
5.2.6.1 Replacement........................................................................................................5-11
5.2.6.2 Replacing the Photosensor Assembly (PCB Photosensor LC2K Assy P/N
228-35842-92) ....................................................................................................5-12
5.2.6.3 Oiling ..................................................................................................................5-12
5.2.7 Converging Block (P/N 228-42255)................................................................. 5-13
5.3 Fan Mounting Plate (P/N 228-42147) ................................................ 5-13
5.4 Switch Assembly (P/N 228-42287-91)............................................... 5-14
5.5 Cooling Fan (P/N 228-25246-91)....................................................... 5-14
5.6 Replacing the Fuse.............................................................................. 5-15
5.7 Replacing the PCB.............................................................................. 5-15
5.7.1 MAIN PUMP Board......................................................................................... 5-15
5.7.1.1 Replacement........................................................................................................5-15
5.7.2 Power-supply Board ......................................................................................... 5-16
5.7.2.1Power Supply, LEA75F-24 (Part No. 074-80426-61(D)), LEA100F-24 (Part No.
074-80427-61(B)) ...............................................................................................5-16
5.7.3 CBM-20Alite (P/N 228-45011-31)................................................................... 5-16
5.7.4 FCV Board (P/N 228-34500) ........................................................................... 5-17
5.8 Front of Module.................................................................................. 5-17
5.8.1 Panel Assembly (P/N 228-43200-91 (AD)、-93 (AB)) ................................... 5-17
5.8.2 Front Panel Adjustment Procedure ................................................................... 5-19
5.8.3 Leak-sensor Assembly (P/N 228-39247-92) .................................................... 5-22
CHAPTER 6: MAINTENANCE AND ADJUSTMENT ........... 6-1
6.1 Maintenance Commands ...................................................................... 6-1
6.1.1 FUNC/ PARAMETER GROUP ......................................................................... 6-1
6.1.2 FUNC/ FILE GROUP ........................................................................................ 6-1
6.1.3 FUNC/ CONTROL GROUP .............................................................................. 6-1
6.1.4 FUNC/ SYSTEM GROUP ................................................................................. 6-2
6.1.5 FUNC/ MONITOR GROUP .............................................................................. 6-3
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Table of Contents
6.1.6 FUNC/ FACTORY GROUP ............................................................................... 6-3
6.1.7 VP function ......................................................................................................... 6-4
6.1.8 CALIBRATION/ CBM PARAMETER .............................................................. 6-4
6.2 Performance Inspection.........................................................................6-4
6.2.1 Inspection of Flow-rate Accuracy....................................................................... 6-4
6.2.2 Adjusting the Flow Rate ..................................................................................... 6-5
6.2.3 Fine Adjustment of the Pulsation Width ............................................................. 6-5
6.2.3.1 Connecting the Pressure-recording Cord .............................................................. 6-6
6.2.3.2 Example of Pressure-waveform Recording........................................................... 6-6
6.2.4 Calibrating the Pulsation Width.......................................................................... 6-7
6.2.4.1 Preparation............................................................................................................ 6-7
6.2.4.2 Calibration ............................................................................................................ 6-7
6.2.5 Checking the Concentration for a High-pressure Gradient System .................. 6-10
6.2.6 Checking the Concentration for a Low-pressure Gradient System (only for
LC-20AD) ...................................................................................................... 6-12
6.3 Pressure Sensor ...................................................................................6-14
6.3.1 Recorder Output Signals................................................................................... 6-14
6.3.2 Setting Parameters after Replacing Pressure Sensor......................................... 6-14
6.3.3 Zero Adjustment for Pressure Sensor ............................................................... 6-14
CHAPTER 7:
TROUBLESHOOTING AND CORRECTIVE
ACTION ...........................................................7-1
7.1 Problems and Corrective Action ...........................................................7-1
7.2 Error Messages......................................................................................7-3
CHAPTER 8: CONSUMABLE PARTS..................................8-1
8.1 Consumable Parts..................................................................................8-1
8.2 Other Replacement Parts.......................................................................8-1
8.2.1 Mechanical Parts................................................................................................. 8-1
8.2.2 Electrical Parts.................................................................................................... 8-2
8.3 List of Parts Used..................................................................................8-3
8.3.1 LC-20AD (P/N 228-45000-31)........................................................................... 8-3
8.3.2 Pump D-XP Assembly (P/N 228-42310-91)....................................................... 8-3
8.3.3 LC-20AB (P/N 228-45002-31)........................................................................... 8-7
8.3.4 LC-BXP ASSY (P/N 228-42300-91) .................................................................. 8-7
8.3.5 Pump 20AD Assembly (P/N 228-45550-91) .................................................... 8-11
8.4 List of Parts Used in PCB ...................................................................8-14
8.4.1 MAIN PUMP Board ......................................................................................... 8-14
8.5 Optional Parts......................................................................................8-20
8.5.1 For LC-20AD/ AB ............................................................................................ 8-20
8.5.2 LC-20AD .......................................................................................................... 8-21
8.5.3 LC-20AB .......................................................................................................... 8-21
CHAPTER 9: CIRCUIT DIAGRAMS .....................................9-1
9.1 Circuit Diagrams ...................................................................................9-1
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Table of Contents
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LC-20AD/ AB Service Manual
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Chapter 1: Introduction
Chapter 1: Introduction
This service manual describes maintenance procedures for the LC-20AD/ 20AB solvent delivery
module used in Shimadzu liquid chromatographs. The content of the service manual includes
information concerning its operating principles, construction and a description of its control
circuits, and is compiled in a way that is easy to utilize by service personnel.
Although there are sections that repeat parts of the instruction manual, no details are provided
concerning installation, operation or daily maintenance of the instrument. Appropriate
maintenance of the instrument is to be carried out using the instruction manual in conjunction as
necessary. In addition, cautionary sections concerning safety are to be strictly observed in order to
prevent accidents.
NOTE
• Unless specified otherwise, it can be assumed that the same operations and procedures apply
for both the LC-20AD and the LC-20AB.
• There may be some differences, however, between the screw positions for the two models.
NOTE
• Due to modifications of the product, parts in the actual instrument or circuits thereof may be
different from those presented in the service manual. In addition, note that service parts may
not be available for all of the parts indicated in the exploded diagrams and part lists.
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Chapter 1: Introduction
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LC-20AD/ AB Service Manual
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Chapter 2: Safety Instructions
Chapter 2: Safety Instructions
2.1 Work Safety Instructions
・ Before using the product, carefully read this Safety Instructions section to ensure correct use.
・ The Safety Instructions listed in this section are important for maintaining safety. Strictly follow
all the instructions.
・ In this manual, the instructions are divided into the following classes according to the danger,
degree of damage, and imminence.
WARNING
Indicates a potentially hazardous situation which, if not avoided, could result
in moderate to serious injury or possibly death.
CAUTION
Indicates a potentially hazardous situation which, if not avoided, may result in minor
injury or physical damage.
"Minor injury" is an injury not requiring hospitalization or long-term visits for
hospital treatment.
"Physical damage" is damage to the product and damage to furniture or other items
around the product.
CAUTION
• Used to indicate possible damage to the product or other physical damage.
Note
• Used to enhance work efficiency or to assist understanding the text.
2.1.1 Safety Instructions Related to Application
WARNING
This instrument is a SOLVENTsolvent delivery module for use with a high
performance liquid chromatography system. Use this instrument ONLY for the
intended purpose.
Using this instrument for any other purpose could cause accidents.
LC-20AD/ AB Service Manual
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Chapter 2: Safety Instructions
2.1.2 Safety Instructions Related to Installation Location
Warning
The solvents used in high performance liquid chromatography are flammable
and toxic. The room where the instrument is installed should be well
ventilated.
Otherwise, solvent vapors could cause poisoning or ignite and cause a fire.
High performance liquid chromatography uses large amounts of flammable
organic solvents. Use of open flame in the vicinity of this instrument must be
strictly prohibited. Do not install the instrument in the same room with any
other equipment that emits or could potentially emit sparks.
Sparks could cause a fire. Provide fire extinguishers for use in case of fire.
Provide protective equipment near the instrument.
If solvent gets into the eyes or on the skin, it must be flushed away
immediately. Provide equipment, such as eye wash stations and safety
showers, as close to the instrument as possible.
CAUTION
The weight of the system controller is 10 kg (LC-20AD)/ 13 kg (LC-20AB). When
performing installation, consider the entire weight combined with other LC
components.
The lab table on which the system controller is installed should be sufficiently strong to
support the total weight of the LC system. It should be level, stable, and have a depth
of at least 60 cm.
If the table is unstable or too small, the instrument could tip over or fall off.
60 cm min.
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Chapter 2: Safety Instructions
CAUTION
Do not install the instrument in a location subject to significant corrosive gas or dust.
This may impair performance and reduce the instrument life.
When carrying the instrument, do not hold it by the front panel.
This may result in damage or detachment of the front panel.
2.1.3 Safety Instructions Related to Installation Work
WARNING
Take measures to prevent the instrument from falling in the event of an
earthquake or other disaster.
Strong vibrations could cause the instrument to fall over, resulting in injury.
The power supply voltage and power consumption of the instrument are listed
below. The power supply voltage of the instrument is indicated by the label on
the right panel. Connect the instrument only to a power supply with the
voltage indicated. Otherwise, fire or electric shock may occur.
Check that the power supply voltage is stable and has sufficient current
capacity to operate all the components of the system. If not, the instrument
will not operate at its rated performance levels.
Power-supply Specifications for the LC-20AD (228-45000-**) / LC-20AB
(228-45002-**)
P/N
228-45000-31
228-45002-31
228-45000-32
228-45002-32
228-45000-38
228-45002-38
Power-supply voltage
100 VAC (100 - 120 V ~)
120 VAC (100 - 120 V ~)
220 - 240 VAC (220 - 240 V ~)
Power consumption
150 VA
180 VA
150 VA
180 VA
150 VA
180 VA
Frequency
50/ 60 Hz
Adequately ground the instrument.
Inadequate grounding may result in electric shock injuries in the event of
failures or short circuits.
Grounding is important to ensure stable operation. (See the Grounding
section in 9.1.3 Power Supply Connection.)
Do not insert the adaptor earth lead into the power socket or let it contact the
power socket. This may result in fire or electric shock injuries.
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Chapter 2: Safety Instructions
WARNING
Do not place heavy objects on the power cable and keep it well away from
heat-generating devices. Damage to the cable may result in fire, electric
shock, or malfunction.
If the cable is damaged, immediately contact your Shimadzu representative.
Do not modify the power cable. Do not forcibly bend or stretch the cable.
A damaged power cable may result in fire or electric shock injuries.
CAUTION
Take care not to trap your fingers when installing the instrument.
When opening the doors, be careful not to pinch your fingers. This could result in
injury.
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Chapter 2: Safety Instructions
2.1.4 Safety Instructions Related to Work and Operation
WARNING
Provide adequate static-electricity countermeasures to prevent major fire or
explosion injuries (See 2.2 Safety Instructions Related to Static Electricity.)
Wear protective goggles when handling solvents.
Solvents entering the eyes may result in blindness.
If a solvent enters the eyes, immediately rinse with water and seek medical
assistance.
The reservoir bottles are pressurized if the helium degasser unit is used. Do
not use a cracked reservoir bottle. This may result in injuries if the bottle fails.
Do not use a flammable spray (hair spray, insecticide spray, etc.) near the
instrument. These may ignite and cause fire.
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Chapter 2: Safety Instructions
2.1.5 Safety Instructions Related to Inspection, Maintenance, and Servicing
WARNING
Remove the plug from the power socket before conducting inspection or
maintenance work or replacing parts. Failure to do so may result in electric
shocks or shorting accidents.
Replace a fuse only with the designated fuse type.
Using an incorrect fuse may result in fire.
Wipe any dust off the plug face or pins with a dry cloth.
Using a plug with accumulated dust may result in fire.
Replace parts only with parts listed in "Chapter 8: Consumable Parts" in the
service manual and "9.3 Replacement Parts" in the Instruction Manual.
Using other parts may result in damage to the part and cause incorrect
operation.
Do not leave the instrument wet with water. This can result in rust or
discoloration.
Do not wipe the instrument with alcohol or thinners.
Dispose of waste liquid properly, in accordance with the regulations or
instructions of your administrative department.
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Chapter 2: Safety Instructions
2.2 Safety Instructions Related to Static Electricity
Liquid chromatography (LC) uses flammable organic solvent(s) as the mobile phase. Operators
must be constantly on guard against accidents involving fire or explosion. The major cause of
these accidents is static electricity, however, devising preventive measures for static electricity is
difficult, because the symptoms preceding an accident vary and is hard to detect. In addition, such
accidents tend to occur only as a result of several coincidences occurring simultaneously.
Especially, LC systems are often used in situations where large amounts of flammable substances
are in use. Once an accident occurs, it can produce large-scale damage.
Followings are the descriptions of the sequences of events leading to static electricity accidents
and recommended measures for preventing static electricity accidents. Take thorough safety
measures based on this information.
2.2.1 Events leading to static electricity accidents (typical examples)
Static electricity accidents are caused by the following sequence of events:
1. Generation of static electricity
When liquid is passed through thin tubing at high flow rates (as in liquid chromatography),
the electrostatic charges of the flowing matter generate static electricity.
2. Electrostatic charges and accumulation of static electricity
If an electrostatically charged liquid is allowed to accumulate in an electrically insulated
container, the charge will gradually increase, and can eventually reach several thousand
volts.
3. Release of energy through electrical discharge
When an electrical conductor is brought within a certain distance of the container, electrical
discharge will occur, releasing thermal energy.
4. Ignition of flammable substances
This thermal energy can ignite any flammable gas of sufficient density in the vicinity.
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Chapter 2: Safety Instructions
2.2.2 Preventing Static Electricity Accidents
The best way to prevent static electricity accidents is simply to prevent the occurrence and
accumulation of electrostatic charges.
CAUTION
It is important to take multiple preventive measures simultaneously.
If large amounts of flammable solvents are collected in a large container, implement
preventative measures 1, 2, and 3 below
2.2.2.1 Preventive Measure 1
Use a metal container for the waste liquid, and ground the container.
The electrical charges of the container and liquid can pass to the ground.
Accessories for this measure
1. Grounding wire with clip
P/N 228-21353-91
2. 18-liter metal container
P/N 038-00044
3. 4-liter metal container
P/N 038-00043-01
CAUTION
Be sure to ground the metal waste container properly. If the grounding wire is not
properly attached or connected to the ground, static electricity can build up even in
the metal container.
Use a tester to make sure that electricity is conducted to the ground. Some metal
containers may have non-conductive laminated or oxidized surfaces.
-10
If the liquid drained into the waste liquid container has poor conductivity (10 S/m or
less), a conductive liquid must be mixed in for safety. The conductive liquid may be
added to the container in advance.
Preventive Measures for Static
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Chapter 2: Safety Instructions
2.2.2.2 Preventive Measure 2
Reduce the gaps at the inlet and outlet openings of the waste container to prevent any sparks
generated outside the container from getting inside.
Accessories for this measure
1. Caps for 18-liter or 4-liter containers (for 3 mm dia. holes, contents 3) P/N 228-21354-91
2.2.2.3 Preventive Measure 3
Keep electrostatically charged objects, including the human body, away from the waste liquid
container.
Take the following precautions to prevent electrostatic charging of the human body:
・ wear anti-static clothing and shoes;
・ ground the human body with anti-static wrist straps (for safety, ground the wrist strap
through an approximately 1 MΩ (resistor); and
・ make the floor conductive by spreading anti-static matting.
CAUTION
Persons who have not taken anti-static precautions should touch some grounded
metal object to drain static charges before approaching the waste liquid container.
2.2.2.4 Preventive Measure 4
Use tubing with an inner diameter of at least 2 mm for drain lines with high flow rates.
CAUTION
Periodically check the tubing connections for leaks.
Air bubbles in the liquid can magnify the electrostatic charge by a factor of 20, 30 or
more.
2.2.2.5 Preventive Measure 5
Take the following additional precautions if a conductive waste liquid container cannot be used:
・ Ensure that the end of the inlet tubing is always submerged inside the container. Place a
grounded metal object, such as a ground wire connected to the instrument, into the liquid.
CAUTION
These measures will be ineffective for liquid of low conductivity (less than 10
-10
S/m).
Use as small a container as possible to minimize damage in the event of fire.
Maintain the room at a proper humidity. Ambient humidity exceeding 65% will
prevent static electricity.
For Reference
Anti-static equipment (anti-static clothing, shoes and matting) and charge measurement
equipment (potentiometer) are sold by specialty manufacturers.
LC-20AD/ AB Service Manual
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Chapter 2: Safety Instructions
2.3 Cautions for Mobile Phase Selection and Use
CAUTION
Do not use the following mobile phases if PEEK resin parts are used: concentrated
sulfuric acid, concentrated nitric acid, dichloroacetic acid, acetone, tetrahydrofuran
(THF), dichloromethane, chloroform, dimethyl sulfoxide (DMSO).
These mobile phases weaken the PEEK resin, which can result in cracked pipes and
mobile phase leaks.
NOTE
• Briefly using a weak solution of less than 0.5% acetone in water (e.g. in order to check
gradient performance) presents no problems.
About PEEK Tube
1. The pressure resistance of PEEK tube varies according to the tube inner diameter, the
manufacturer, and the solvent used. Only use the 0.13 mm ID PEEK tube supplied with the
instrument. Shimadzu is not responsible for accidents due to the use of non-genuine parts.
For example, the PEEK tube may fail if used continuously at a pressure exceeding 27.5 MPa
(280 kgf/cm2) when acetonitrile is used as the mobile phase. This is an extremely dangerous
situation. When an organic solvent is used as the mobile phase, use a pressure lower than 27.5
MPa (280 kgf/cm2) or replace the PEEK tube with SUS pipe.
2. Bending PEEK tube in a sharp radius reduces the strength of the tube at the bend. Do not bend
to a radius below 10 mm. Allow the tube to adopt its natural shape; do not forcibly bend it and
fix it into position.
NOTE
• Use only HPLC grade or comparable mobile phase. Before use, filter the mobile phase with
a filter of 0.45 µm mesh or finer to remove particulates and foreign matter.
• Halogen ions can corrode the stainless steel (SUS316) pipes. Avoid mobile phases that
contain halogen ions - such as KCI, NaCI and NH4Cl - or mobile phases that generate
halogen ions in certain reactions.
• If such mobile phases must be used, flush all flow lines thoroughly with distilled water
immediately after analysis.
• When an SPD or other UV detector is used for high-sensitivity analysis, use HPLC grade
mobile phase that has low UV absorptivity.
• Always degas the mobile phase. Otherwise, air bubbles tend to form in the mobile phase
during mixing of solvents or when a change in temperature or pressure occurs. Air bubbles
can cause pump malfunctions and detector signal noise.
• For boiling points, viscosities and other data relating to the mobile phases used, see 9.7
Mobile Phase Characteristics in the Instruction Manual.
LC-20AD/ AB Service Manual
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Chapter 2: Safety Instructions
2.4 Warning Labels
To ensure safe operation, warning labels are affixed to where special attention is required.
Should any of these labels peel off or be damaged, obtain replacements from Shimadzu
Corporation and reattach them in the correct positions.
Warning Label Positions
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Chapter 2: Safety Instructions
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LC-20AD/ AB Service Manual
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Chapter 3: Specifications
Chapter 3: Specifications
3.1 Specifications of LC-20AD as Individual Module
(1) Pump Type
Micro-volume double-plunger pump (approx. 10 µL/ stroke)
(2) Pumping Method
Constant-flow Pumping and Constant-pressure Pumping
Constant-flow Pumping
・ Flow-rate Setting Range
0.0001 to 5 mL/ min [1.0 to 40 MPa ]
5.0001 to 10 mL/ min [1.0 to 20 MPa ]
・ Flow-rate Accuracy
±1% or ±0.5 µL/ min, whichever is the greater (0.01 to 2 ml/min)
±2% (2 to 5 mL/ min)
(when water is pumped at a pressure of 1.0 to 40 MPa, with room temperature constant
between 20 and 30 °C)
・ Flow-rate Precision ±0.3% (RSD 0.1% max.)
(when water is pumped at a rate of 0.1 to 5 ml/min at a pressure of 1.0 to 40 MPa, with
room temperature constant between 20 and 30 °C.)
Constant-pressure Pumping
・ Pressure Setting Range
1.0 to 40 MPa (0.1-MPa steps)
・ Pressure Setting Accuracy
±10% or 1.0 MPa, whichever is the greater
(3) Pressure-limiting Function
Upper and lower limits
(4) Materials Used in Parts Coming in Contact with Liquids
SUS316L, PEEK, PTFE, ruby, sapphire, Hastelloy C®
(5) Suction Filter
10 µm
(6) Line Filter
5 µm Capacity: Approx. 30 µl
(7) Time Program
Flow rate, pressure, EVENT functions, LOOP (for program repetition)
10 files, 320 steps in total
(8) Pressure Display Accuracy
±2% or ±0.5 MPa, whichever is the greater
(9) Plunger Rinsing Line
Automatic rinsing enabled by connecting optional automatic rinsing pump.
(10) Size
260 (W) × 140 (H) × 420 (D) (mm) (excluding protruding parts)
(11) Weight
10 kg
(12) Operating Temperature Range
4 ~ 35 °C
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Chapter 3: Specifications
(13)Power Supply
P/N
228-45000-31
228-45000-32
228-45000-38
Power-supply voltage
100 to 120 VAC
100 to 120 VAC
220 to 240 VAC
Power consumption
Frequency
150 VA
50/ 60 Hz
3.2 LC-20AD: High-pressure Gradient System
(1) High-pressure Gradient System Controlled by System Controller (CBM-20A)
・ Number of Solvents Mixed
2 or 3
・ Gradient Profile
Step, linear, and exponential functions (only when controlled from an LC workstation)
possible at multiple levels.
・ Maximum Number of Program Steps
20 files, 400 steps in total
・ Program Duration
0.01 to 9,999.9 minutes (in 0.01-minute steps)
・ Mixture-ratio Setting Range
0% to 100% (in 0.1% steps)
・ Concentration Setting Accuracy
±0.5% (for 2-liquid gradient with water/caffeine solution, at 0.05 to 2 ml/min, 1.0 to
40 MPa)
・ Possible Flow-rate Range
0.0001 to 10 ml/min
(2) High-pressure Gradient System Controlled by Solvent Delivery Module (LC-20AT)
・ Number of Solvents Mixed
2
・ Gradient Profile
Step and linear functions possible at multiple levels.
・ Maximum Number of Program Steps
10 files, 320 steps in total
・ Program Duration
0.01 to 999.99 minutes (in 0.01-minute steps)
・ Mixture-ratio Setting Range
0% to 100% (in 0.1% steps)
・ Concentration Setting Accuracy
±0.5% (for 2-liquid gradient with water/caffeine solution, at 0.05 to 2 ml/min, 1.0 to
40 MPa)
・ Possible Flow-rate Range
0.0001 to 10 ml/min
LC-20AD/ AB Service Manual
3-2
Chapter 3: Specifications
3.3 LC-20AD: Low-pressure Gradient System
(1) Low-pressure Gradient System Controlled by System Controller (CBM-20A)
・ Number of Solvents Mixed
4 max.
・ Gradient Profile
Step, linear, and exponential functions (only when controlled from an LC workstation)
possible at multiple levels.
・ Maximum Number of Program Steps
20 files, 400 steps in total
・ Program Duration
0.01 to 9,999.9 (0.01-minute steps)
・ Mixture-ratio Setting Range
0% to 100% (in 0.1% steps)
・ Concentration Setting Accuracy
±1.0% (for 2-liquid gradient with water/caffeine solution, at 0.1 to 2 ml/min, 1.0 to 20
MPa)
・ Possible Flow-rate Range
0.0001 to 2 ml/min
(Use at 2 ml/min or higher is possible but the service life of the low-pressure gradient
unit's solenoid valves will be reduced.)
(2) Low-pressure Gradient System Controlled by Solvent Delivery Module (LC-20AT)
・ Number of Solvents Mixed
4 max.
・ Gradient Profile
Step and linear functions possible at multiple levels.
・ Maximum Number of Program Steps
10 files, 320 steps in total
・ Program Duration
0.01 to 999.99 minutes (in 0.01-minute steps)
・ Mixture-ratio Setting Range
0% to 100% (in 0.1% steps)
・ Concentration Setting Accuracy
±1.0% (for 2-liquid gradient with water/caffeine solution, at 0.1 to 2 ml/min, 1.0 to 20
MPa)
・ Possible Flow-rate Range
0.0001 to 2 ml/min
(Use at 2 ml/min or higher is possible but the service life of the low-pressure gradient
unit's solenoid valves will be reduced.)
LC-20AD/ AB Service Manual
3-3
Chapter 3: Specifications
3.4 Specifications of LC-20AB as Individual Module
(1) Pump Type
Microvolume double-plunger pump (approx. 10 µl/ stroke)
(2) Pumping method
Constant-flow Pumping
・ Flow-rate Setting Range
0.0001 to 5 mL/ min [1.0 to 40 MPa ]
5.0001 to 10 mL/ min [1.0 to 20 MPa ]
・ Flow-rate Accuracy
±1% or ±0.5 µL/ min, whichever is the greater (0.01 to 2 ml/min)
±2% (2 to 5 mL/ min)
(when water is pumped at a pressure of 1.0 to 40 MPa, with room temperature constant
between 20 and 30 °C)
・ Flow-rate Precision ±0.3% (RSD 0.1% max.)
(when water is pumped at a rate of 0.1 to 5 ml/min at a pressure of 1.0 to 40 MPa, with
room temperature constant between 20 and 30 °C.)
Constant-pressure Pumping
・ Pressure Setting Range
1.0 to 40 MPa (0.1-MPa steps)
・ Pressure Setting Accuracy
±10% or 1.0 MPa, whichever is the greater
(3) Pressure-limiting Function
Upper and lower limits
(4) Materials Used in Parts Coming in Contact with Liquids
SUS316L, PEEK, PTFE, ruby, sapphire, Hastelloy C®
(5) Suction Filter
10 µm
(6) Line Filter
Mesh: 5 µm; Capacity: Approx. 30 µl
(7) Time Program
Flow rate, pressure, EVENT functions, LOOP (for program repetition)
10 files, 320 steps in total
(8) Pressure Display Accuracy
±2% or ±0.5 MPa, whichever is the greater
(9) Plunger Rinsing Line
Automatic rinsing enabled by connecting optional automatic rinsing pump.
(10) Size
260 (W) × 140 (H) × 420 (D) (mm) (excluding protruding parts)
(11) Weight
13 kg
(12) Operating Temperature Range
4 ~ 35 °C
(13) Power Supply
P/N
228-45002-31
228-45002-32
228-45002-38
Power-supply voltage
100 to 120 VAC
100 to 120 V C
220 to 240 VAC
LC-20AD/ AB Service Manual
3-4
Power consumption
Frequency
180 VA
50/ 60 Hz
Chapter 3: Specifications
3.5 LC-20AB: High-pressure Gradient System
(1) High-pressure Gradient System Controlled by System Controller (CBM-20A)
・ Number of Solvents Mixed
2
・ Gradient Profile
Step, linear, and exponential functions (only when controlled from an LC workstation)
possible at multiple levels.
・ Maximum Number of Program Steps
20 files, 400 steps in total
・ Program Duration
0.01 to 9,999.9 minutes (in 0.01-minute steps)
・ Mixture-ratio Setting Range
0% to 100% (in 0.1% steps)
・ Concentration Setting Accuracy
±0.5% (for 2-liquid gradient with water/caffeine solution, at 0.05 to 2 ml/min, 1.0 to
40 MPa)
・ Possible Flow-rate Range
0.0001 to 10 ml/min
(2) High-pressure Gradient System Controlled by Solvent Delivery Module (LC-20AT)
・ Number of Solvents Mixed
2
・ Gradient Profile
Step and linear functions possible at multiple levels.
・ Maximum Number of Program Steps
10 files, 320 steps in total
・ Program Duration
0.01 to 999.99 minutes (in 0.01-minute steps)
・ Mixture-ratio Setting Range
0% to 100% (in 0.1% steps)
・ Concentration Setting Accuracy
±0.5% (for 2-liquid gradient with water/caffeine solution, at 0.05 to 2 ml/min, 1.0 to
40 MPa)
・ Possible Flow-rate Range
0.001 to 10 ml/min
3.6 Operating Principle
These modules use double reciprocating plunger pumps and, by pumping alternately from two
pump heads arranged in parallel, can perform continuous pumping. The stepping motor's torque is
transmitted to the cam, causing the crosshead to perform piston motion. Because the stepping
motor is microstep driven with 4 phases, the rotational accuracy by the cam for each pulse is
0.056o (6,400 pulses/rotation), a very small amount. This makes it possible to achieve much
smoother rotation than is possible with conventional stepping-motor driving. By setting the P-HP
for both the right and left pumps, dividing one cam revolution into 64 intervals, and calibrating to
LC-20AD/ AB Service Manual
3-5
Chapter 3: Specifications
obtain the optimum rate of rotation for each interval, the pulsation is reduced even further. The
CPU calculates the cam's rotation angle from the home position detected with a photocoupler.
LC-20AD/ AB Service Manual
3-6
Chapter 4: Names of Parts
Chapter 4: Names of Parts
4.1 Front
Refer to the Instruction Manual for details.
The only difference between the LC-20AD and LC-20AB is the name display; there are no
differences in functions.
Display panel
Drain-valve knob
Keypad
Panel assembly
Right panel
Power switch
LC-20AD
4.2 Behind Front Cover
Refer to the Instruction Manual for details.
Option tray
Pressure sensor
Check valve OUT
Pump head
Head holder
Check valve IN
Plumbing inlet
LC-20AD
Converging block
Pressure sensor
Check valve OUT
Pump head
Head holder
Check valve IN
Plumbing inlet
Pump B
Pump A
LC-20AB
LC-20AD/ AB Service Manual
4-1
Chapter 4: Names of Parts
4.3 Back
Refer to the Instruction Manual for details.
There are no major differences between the back panels of the LC-20AD and the LC-20AB.
Power
connector
DGU PRESS
connector
Remote
connector
Fuse holders
DGU/SOL.V
connector
External I/O
terminals
PUMP PRESS
connector
LC-20AD
4.4 Interior
Option tray
Power supply,
LEA75F-24
PCB photosensor
LC2K Assembly
Pressure-sensor
assembly
PCB, LC-20AD
Pump
assembly
Fan
LC-20AD
LC-20AD Parts List
No.
1
2
3
4
5
6
7
8
P/N
228-45550-91
228-42287-91
228-25246-91
228-41841-01
228-35842-92
228-45552-95
228-42114-91
228-80426-61
Part name
Pump ASSY
Switch ASSY
Fan
Pump body
PCB photosensor LC2K ASSY
Pressure-sensor ASSY, D-XP
PCB, LC-20AD
Power supply, LEA75F-24
LC-20AD/ AB Service Manual
4-2
Chapter 4: Names of Parts
PCB photosensor
LC2K Assy
Fan
PCB photosensor
LC2K Assy
Power supply,
LEA75F-24
(underneath PCB,
LC-20AB)
PCB, LC-20AB
Pressure-sensor
assembly
Fan
LC-20AB
LC-20AB Parts List
No.
1
2
3
4
5
6
7
8
P/N
228-42300
228-42287-91
228-25246-91
228-41841-01
228-35842-92
228-45552-91
228-42118-91
228-80427-61
Part name
Pump ASSY
Switch ASSY
Fan
Pump body
PCB photosensor LC2K ASSY
Pressure-sensor ASSY
PCB, LC-20AB
Power supply, LEA100F-24
LC-20AD/ AB Service Manual
4-3
Chapter 4: Names of Parts
4.5 Flow-line Diagram
LC-20AD
Parts List
No.
Part name
P/N
1
Suction-filter ASSY
228-39181-95
2
Plumbing inlet VP ASSY
228-18739-92
3
Check valve IN DX1.50
228-45557-91
4
Pump head 10AD
228-34541-01
5
PL holder CO-SA ASSY
228-35281-94
6
Plunger CO-SA ASSY
228-34498-93
7
Check valve OUT D1.5
228-45563-95
8
Pressure-sensor ASSY
228-45552-95
9
Housing, line filter
228-39082-01
10
Peak filter
228-32744
11
Drain-valve ASSY
228-45574-91
LC-20AD/ AB Service Manual
4-4
Chapter 4: Names of Parts
LC-20AB
Parts List
No.
Part name
P/N
1
Suction-filter ASSY
228-39181-95
2
Plumbing inlet VP ASSY
228-18739-92
3
Check valve IN DX1.50
228-45557-91
4
Pump head 10AD
228-34541-01
5
PL holder CO-SA ASSY
228-35281-94
6
Plunger CO-SA ASSY
228-34498-93
7
Converging block B-XP
228-42255
8
Check valve OUT D1.5
228-45563-95
9
Pressure-sensor ASSY
228-45552-95
10
Housing, line filter
228-39082-01
11
Peak filter
228-32744
12
Drain-valve ASSY
228-45574-91
LC-20AD/ AB Service Manual
4-5
Chapter 4: Names of Parts
4.6 Pump Assembly
Refer to "5.2.6 Pump Assembly (P/N 228-45550-99)" for details on the pump assembly.
Photosensor
mounting plate
P/N 228-41891
Pump body
P/N 228-41841-01
Check valve OUT
P/N 228-45563-91
PCB photosensor
P/N 228-35842-92
Pump head
P/N 228-34541-01
Disk, pump XP
P/N 228-41890
Check valve IN
P/N 228-45557-91
Head holder
P/N 228-38022
Motor, pump XP
P/N 228-42109
Oil receptacle
P/N 228-24474
Oil mat
P/N 228-24470-01
LC-20AD/ AB Service Manual
4-6
Chapter 5: Assembly and Disassembly
Chapter 5: Assembly and Disassembly
WARNING
Before opening the cover and inspecting or replacing internal parts, be sure to
turn OFF the power to the module and remove the power cable.
5.1 Handling the Carrier Liquid
5.1.1 Rinsing the Pump
A dirty flow line is often the cause of drift and large fluctuations in the baseline. The module can
be kept in optimum condition by rinsing (running) the pump on a daily basis before and after
analysis.
The suction filter can become clogged with dirt and other foreign matter after extended use,
resulting in the formation of bubbles and making it impossible to attain the correct flow rate.
Also, dirt that penetrates the interior of the filter may remain for a long time. If dirt becomes
attached to the pump heads, check valves, drain valve, or line filter, this dirt may enter the
column little by little and cause baseline drift.
If the dirt is relatively easy to remove, rinsing is performed with isopropyl alcohol or methanol.
In more severe cases, 10% nitric acid is used. Rinse thoroughly with water after using 10% nitric
acid.
WARNING
Mixing an alcohol, such as isopropyl alcohol, with nitric acid creates an
explosive substance and is extremely dangerous. Rinse thoroughly with water
before rinsing with nitric acid.
Be sure to distinguish between the waste containers for organic solvent and
for nitric acid.
Rinse thoroughly with distilled water or deionized water after rinsing with nitric
acid.
5.1.2 Rinsing When Using Buffer Solution as Carrier Liquid
If using buffer solution, or any other liquid that leaves crystals or residue on drying, as the
carrier liquid, leaving the carrier liquid in the module for a long time can cause clogging in the
plumbing or damage the pump's plungers.
Therefore, when not using the module for a long period, rinse thoroughly with distilled water or
deionized water.
Also, when changing the carrier liquid from a buffer solution to an organic solvent, be sure to
change the liquids in the following order: buffer solution → distilled water (deionized water) →
isopropyl alcohol → organic solvent.
This is to prevent the precipitation of salt in the buffer solution.
LC-20AD/ AB Service Manual
5-1
Chapter 5: Assembly and Disassembly
5.1.3 Rinsing When Using Halogenated Organic Solvent
Solvents containing halogen ions, such as KCl, NaCl, and NH4 Cl (e.g., buffer-solution carrier
liquids) and solvents that generate halogen ions through reactions may corrode the stainless steel
used in the flow lines and so rinse thoroughly with purified water after using such solvents.
5.1.4 Replacing the Carrier Liquid
A. Replacing with a miscible carrier liquid:
1) Prepare the new carrier liquid in a clean beaker.
2) Remove the suction filter from the bottle used for the old carrier liquid, put it in the beaker
described in step 1, and wash it thoroughly while shaking the filter.
3) Open the drain valve and press the purge key to flush out the carrier liquid in the pump.
4) Repeat steps 1 to 3 two or three times when performing high-sensitivity analysis or using a
refractive index detector.
5) Insert the suction filter in the bottle used for the new carrier liquid, close the drain valve
after lowering the flow speed, and rinse the flow lines for a while.
6) Finally, connect the column and the detector cell, and rinse the whole analytical flow line.
B. Replacing with a non-miscible carrier liquid:
In this case, prepare an intermediate rinse solution that is miscible with both old and new
mobiles phases (e.g., isopropanol). First, replace the old carrier liquid with the rinse solution and
then replace the rinse solution with the new carrier liquid. Perform both replacements by
following steps 1 to 5 described above.
C. Replacing a buffer-solution carrier liquid:
If buffer solution is used for either or both of the old and new carrier liquids, prepare distilled
water as an intermediate rinse solution, and completely fill the flow lines with the distilled water
before replacing it with the new carrier liquid. This is to prevent the precipitation of salt in the
buffer solution.
CAUTION
• If an organic solvent, such as isopropyl alcohol, is flushed through the flow lines before
rinsing with distilled water or deionized water, it may not be possible to remove crystals or
residue.
5.1.5 Degassing the Solvent
In general, degassing of the solvent (in particular, the removal of oxygen) is very important in
high-performance liquid chromatographs for preventing the oxidation of easily oxidized samples,
degradation of the column's stationary phase, and the formation of bubbles in the pump and
detector.
In particular, when two or more solvents are mixed in the system, as is the case with gradient
systems, because the solubility of air is different for each solvent, so bubbles are formed when
the solvents are mixed, and it may not be possible to perform normal analysis.
As a countermeasure, helium degassers and online degasser have come to be used frequently to
degas solvents.
Online degassers continuously remove gases that have been dissolved in a liquid through a
special synthetic resin film.
LC-20AD/ AB Service Manual
5-2
Chapter 5: Assembly and Disassembly
Helium degassers bubble helium gas, which has a much lower solubility level than air, directly
into the solvent, thereby purging air out of the solvent and saturating it with inert helium gas.
Because helium gas has a low solubility level, there is no danger of bubbles forming, even in
gradient systems.
The following degassing methods can also be used.
A. Degas by boiling the carrier liquid for 5 to 10 minutes immediately before use and then
reducing the temperature to room temperature.
B. Degas using an ultrasonic bath, stirring the carrier liquid vigorously for 5 to 10 minutes.
C. Degas by churning thoroughly.
5.1.6 Not Using the Pump for Long Periods
Rinse the pump's flow lines with isopropyl alcohol or methanol, purge the solvent with regular
N2 gas, and allow the pump to dry. Finally, ensure that dirt does not penetrate the interior by
inserting stoppers in the connection ports. Store the suction filter and other similar items in
plastic bags.
5.2 Structure and Maintenance of Flow-line Parts
Possible causes of unstable flow rates include liquid leakage and changes in flow-line resistance.
These problems can be identified by recording the waveform of the pump's discharge pressure or
by visual inspection. Methods for identifying and handling abnormalities in flow-line parts and for
performing maintenance and inspection are explained here in the order corresponding to the flow
of the carrier liquid.
Liquid leakage is difficult to identify when using a volatile solvent as the carrier liquid and so
replace it with well-degassed distilled water and perform inspection at a pressure close to the
maximum operating pressure.
5.2.1 Plumbing Inlet (Plumbing-inlet Assembly, P/N 228-18648)
Plumbing Inlet
List of Parts for Plumbing Inlet
No.
P/N
Part name
1
228-18648
Inlet block
2
228-18495-01
Tefzel tubing 1.6X0.8
3
228-18565
Male nut PEEK
4
228-35403
Male nut 1.6MN PEEK
The plumbing inlet is mounted to the mixer panel (Part No. 228-42208), which is in front of the
pump assembly.
1) Remove the male nut from check valve IN.
LC-20AD/ AB Service Manual
5-3
Chapter 5: Assembly and Disassembly
2) Push down on the mixer panel's catch and pull the mixer panel forward to remove it from
the module.
Mixer Panel's Catch
3) Remove the catch at the back of the mixer panel and remove plumbing inlet from the mixer
panel.
Plumbing Inlet's Catch (Back of Mixer Panel)
4) Mount the new plumbing inlet by performing steps 1 to 3 in reverse.
5.2.2 Suction-filter Assembly (P/N 228-39181-95)
5.2.2.1 Assembly Diagram for Plumbing Parts
Parts List for Suction-filter Assembly
No.
P/N
Part name
228-39181
Suction-filter ASSY
10
228-39084
Bushing, 3PEEK
11
228-12493
Ferrule, 3.0F-T
12
228-43342-91
Filter ASSY
13
670-10321-05
Teflon FEP tube, 3X1.5
14
228-12654
Coil spring
5.2.2.2 Inspection
The suction filter may become clogged after long-term use or if it is used for carrier liquids
containing lots of impurities.
If the suction filter is clogged, the pressure inside the suction filter drops when carrier liquid
is sucked in, dissolved air forms bubbles, and this causes fluctuations in the flow rate.
Inspection Method
LC-20AD/ AB Service Manual
5-4
Chapter 5: Assembly and Disassembly
1) Record the pressure waveform.
2) Record the pressure waveform with the filter removed.
3) If the pressure waveform recorded with the filter removed is better, this indicates that
clogging has occurred. Clean or replace the suction filter as appropriate.
CAUTION
• The purpose of the suction filter is to prevent deterioration of the pump's plunger seals and
check valves as well as the column due to impurities in carrier liquid. Ensure that it is
mounted at all times, except during inspection.
5.2.2.3 Cleaning and Replacement
Refer to "8.7 Inspection (Replacement) and Ultrasonic Bath Cleaning of Suction Filter" in
the Instruction Manual for details on methods for cleaning and replacing the suction filter.
5.2.3 Check Valves
5.2.3.1 Check Valve IN Assembly (P/N 228-45557-91)
Parts List for Check Valve IN Assembly
No.
P/N
Part name
228-45557
Check valve IN DX-1.5
10
228-42184-91
Housing, A-IN-1.5 ASSY
11
228-42185-91
Housing, B-IN-1.5 ASSY
21
072-60257
Cap, PVC 10 black
30
228-39087
Pump head 10AD
40
228-42742
Assembly adjustment (spring CHK valve)
LC-20AD/ AB Service Manual
5-5
Chapter 5: Assembly and Disassembly
5.2.3.2 Check Valve OUT Assembly (P/N 228-45563-95)
Parts List for Check Valve OUT Assembly
No.
P/N
Part name
1
228-45563
Check valve, OUT#2 D1.5
10
228-42184-91
Housing, A-IN-1.5 ASSY
11
228-42185-91
Housing, B-IN-1.5 ASSY
12
228-42168
Cartridge OUT-X
13
228-31684-05
Packing 5X1.5XT1.5PEEK
20
228-23498
Cap, PVC D8X10
21
072-60257
Cap, PVC 10 black
30
228-39087
Pump head 10AD
31
228-42187
Cartridge, DT-1.5
5.2.3.3 Housing A (P/N 228-42184)
Parts List
No.
P/N
Part name
1
228-42184
Housing, A-IN-1.5 assembly
10
018-98002-03
Ball, ball sheet D1.5
11
228-42188
Housing, A-IN-1.5
12
228-31742-02
Packing 3.6X1.6XT0.7
13
228-42164-01
Spring, check valve XP
14
228-42167
Plunger CVXP
LC-20AD/ AB Service Manual
5-6
Chapter 5: Assembly and Disassembly
5.2.3.4 Housing B (P/N 228-42185)
Parts List
No. P/N
Part name
1
228-42185
Housing, B-IN-1.5 assembly
10
018-98002-03
Ball, ball sheet D1.5
11
228-42189
Housing, B-IN-1.5
12
228-31742-02
Packing 3.6X1.6XT0.7
5.2.3.5 Disassembly and Inspection
NOTE
• After disassembling or replacing a check valve, calibrate the module to correct for changes
in pumping performance.
Disassembly
1) Remove the housing from the cartridge.
After removing the packing at the top of housing A and housing B with a nipper or similar
tool, push the housing out from the opposite side using a thin rod. (Use a rod with a
diameter of between 1 and 3 mm, such as the needle provided with the LC-20AD.)
2) Remove the balls and ball sheets from housings A and B by pushing them out using an
appropriate rod with a diameter of between 0.7 and 0.8 mm, such as the end of a clip.
NOTE
• The spring in housing A is extremely weak. Do not apply any force in the direction of the
spring axis.
• Be sure not to mix up the balls and ball sheets removed in step 2. The balls and ball sheets
must be in the same combination before and after assembly.
Housing A
Housing B
Inspection
1) Observe the surface of the ball sheets using a magnifying glass or a microscope.
Remove any dirt observed on the side of the ball sheet that makes contact with the ball.
Replacement is necessary, however, if the surface is scratched.
2) Wrap a little gauze around the end of a pair of fine-tipped tweezers, soak it in isopropyl
alcohol or some other appropriate solvent, and clean the ball sheet by rotating the tweezers. Be
careful not to scratch the side of the ball sheet that makes contact with the ball.
LC-20AD/ AB Service Manual
5-7
Chapter 5: Assembly and Disassembly
3) Observe the surface of the balls using a magnifying glass or a microscope. Remove any
dirt observed on the surface. Dirt can be removed by soaking a piece of gauze in
isopropyl alcohol or some other appropriate solvent, wrapping the ball in the gauze,
and rubbing it over the surface of the ball.
NOTE
• Do not use dry gauze. Otherwise, foreign matter may adhere to the surface.
Assembling Check Valve OUT
1) Clean parts in use using ultrasonic cleaning with isopropyl alcohol or some other
appropriate solvent. Be sure not to mix up the balls and ball sheets.
NOTE
• Balls and ball sheets come in pairs. Be sure to use them in the same combinations after
disassembling parts in use.
• Assemble so that ball makes contact with the polished surface of the ball sheet.
2) Return the balls, ball sheets, and packing to their original housings.
NOTE
When continuing to use the old packing, be sure to reinsert it with the same orientation.
Also, if new packing is used, it sometimes becomes detached. In this case, use flat boards in
the way shown below to mount the packing securely.
3) Insert the end of housing B into housing A and. In this combined state, insert both of
them into the cartridge.
4) Check valve OUT is covered with the 5×1.5 packing (Part No. 228-31684-05). If the
packing is new, however, it may become detached. In this case, use the method
described in the NOTE for step 2.
Assembling Check Valve IN
1) Perform step 1 of the procedure for "Assembling Check Valve OUT" described
previously.
2) Return the balls and ball sheets to their original housings.
3) On a flat surface, pile the housings assembled in step 2 on top of each other and then
place the cartridge on the assembly.
5.2.4 Replacing Plunger Seals, Pump Heads, Plungers, and Diaphragms
Plunger Seals and Pump Heads
Refer to "8.2 Replacement of Plunger Seal" in the Instruction Manual
Plungers
Refer to "8.3 Cleaning and Inspection (Replacement) of Plungers" in the Instruction Manual.
LC-20AD/ AB Service Manual
5-8
Chapter 5: Assembly and Disassembly
5.2.5 Pressure Sensor Assembly (P/N 228-45552-95)
List of Parts for Pressure-sensor Assembly
No. P/N
Part name
228-42252
Pressure-sensor block B-XP (LC-2AB)
228-42281
Pressure-sensor block D-XP (LC-2AD)
3
228-42250
228-42251
Diaphragm 22 dia.
4
228-42258
Packing 22DX0.5
5
11
228-32724-20
228-39082-01
Housing, line filter
12
228-32744
Filter, PAT FRIT 68152
13
Spacer, 0.5
14
037-38856-45
228-45574-91
Drain valve DB ASSY
20
017-40021-01
Isopropyl alcohol, S 3L
1
2
Spacer, 0.5 lock ring 2
Pressure sensor C
5.2.5.1 Replacement
Replacement Period
7 years min.
Replacement Procedure
1)
2)
3)
4)
5)
6)
7)
8)
9)
Turn OFF the power to the module and remove the AC cable connected to it.
Remove the right panel and open the left panel.
Remove the two M4 screws behind the cover and remove the cover.
If there is an optional CBM-20Alite board, remove it using the procedure described under "
5.7.3 CBM-20Alite (P/N 228-45011-31)".
Remove all plumbing connected to the pressure-sensor assembly.
When using the LC-20AB, also remove all plumbing connected to the converging block.
Remove the line filter underneath the pressure-sensor assembly.
Remove the connector (LC-20AD: J2; LC20-AB: J11) for the pressure-sensor assembly's
cable from the main board.
Remove the three M4 screws securing the main frame to the mounting fixture behind it.
Remove the four countersunk screws securing the mounting fixture to the chassis and slide
the mounting fixture (with the pressure sensor attached) towards the back of the module to
remove it.
LC-20AD/ AB Service Manual
5-9
Chapter 5: Assembly and Disassembly
10) Remove the four socket-head screws, remove the pressure-sensor assembly from the
mounting fixture, and mount the new pressure-sensor assembly.
NOTE
• The GND cable is tightened together with a cable at one place. Do not forget to attach it.
11) Make a note of the PRS-1 and PRS-5 values on the label attached to the pressure-sensor
assembly's cable.
12) Return all the parts to their original positions by performing steps 3 to 9 in reverse.
13) Turn ON the power to the module while pressing the function key.
14) Press the back key an appropriate number of times and input the values recorded for PRS-1
and PRS-5 in step 10.
15) Press the back key an appropriate number of times and confirm the values for PRS-1 and
PRS-5.
5.2.5.2 Line Filter
Refer to "8.7 Inspection (Replacement) and Ultrasonic Bath Cleaning of Line Filter" in the
Instruction Manual for details on methods for cleaning and replacing the line filter.
Peak filter PAT FRIT
P/N 228-32744
Line-filter housing
P/N 228-39082-01
Line Filter
5.2.5.3 Drain-valve Assembl Assy (P/N 228-45574-91)
Parts List
No.
1
P/N
Part name
228-42666
Seal mounting jig 1
228-45574
Drain-valve ASSY
11
228-42993-01
Shaft, drain valve D
12
036-27024-01
Ring seal, 070002344
13
228-42994
Packing
14
228-24188-01
Cap
15
228-24189-01
Knob
16
020-37054
Screw, SUS, truss M4 × 8
1) Use a mounting jig to replace the ring seal.
2) Place the ring seal on the jig and push it into the shaft to mount it.
LC-20AD/ AB Service Manual
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Chapter 5: Assembly and Disassembly
5.2.6 Pump Assembly (P/N 228-45550-99)
CAUTION
• Do not disassemble or repair the pump assembly to an extent that goes beyond the scope of
the information provided here.
In general, fatal pump errors are dealt with by returning the pump to the factory for repair.
The structure of the pump used in this module necessitates the use of special tools for
assembly and disassembly. Special tools are also required for adjustments involving the
module's electrical circuits (e.g., adjustment of home position).
Examples of fatal errors:
・Operation failure in the drive unit's crosshead (P/N 228-45588-92 Crosshead 20AT Assy)
・Rotation failure in the cam shaft (P/N 228-45595-91 Baseball)
5.2.6.1 Replacement
Replacement Period
7 years min.
Replacement Procedure
1) Turn OFF the power to the module and remove the AC cable connected to it.
2) Remove the right panel and open the left panel.
3) Remove the two M4 screws behind the cover and remove the cover.
4) Remove all plumbing connected to the IN and OUT sides of the pump.
5) If there is an optional CBM-20Alite board, remove it using the procedure described
under " 5.7.3 CBM-20Alite (P/N 228-45011-31)".
6) Remove the pump assembly's motor, the photosensor cable, and the fan cable from the
main board.
7) Remove the above cable from the clamper.
8) Remove the screws securing the fan holder (four, M4) and remove the fan holder.
(Refer to "5.3 Fan Mounting Plate (P/N 228-42147) " for details.)
9) Remove the three M4 screws under the module securing the pump assembly and lift it
upwards and backwards.
Removing the LC-20AD's Pump Assembly
LC-20AD/ AB Service Manual
5-11
Chapter 5: Assembly and Disassembly
CAUTION
• The pump assembly is heavy and so due care is required when removing it. Dropping it or
allowing it to collide with other parts may result in malfunction.
10) Mount the new pump assembly.
11) Return the module to its original state by performing steps 3 to 8 in reverse.
12) Turn ON the power to the module while pressing the function key and confirm that it starts
up normally.
5.2.6.2 Replacing the Photosensor Assembly (PCB Photosensor LC2K Assy P/N
228-35842-92)
Replacement Period
7 years min.
Replacement Procedure
1) Turn OFF the power to the module and remove the AC cable connected to it.
2) Remove the two M4 screws behind the cover and remove the cover.
3) If there is an optional CBM-20Alite board, remove it using the procedure described
under "5.7.3 CBM-20Alite (P/N 228-45011-31)".
4) Remove the cable connector connected to the main PCB from the photosensor
assembly and release the cable from the clamper.
5) The photosensor assembly is mounted to the pump assembly via a metal L bracket and
so remove the photosensor assembly together with the L bracket, replace the
photosensor assembly with a new one, and remount the L bracket in the original
position.
Photosensor
6) Connect the new photosensor assembly's cable connector to the main PCB and clamp
the cable in the original position.
7) Turn ON the power to the module while pressing the function key and confirm that it
starts up normally.
5.2.6.3 Oiling
Period
Inspect every three years.
Replacement Procedure
1) Turn OFF the power to the module and remove the AC cable connected to it.
2) Remove the right panel.
3) Remove the two M4 screws behind the cover and remove the cover.
LC-20AD/ AB Service Manual
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Chapter 5: Assembly and Disassembly
4) Apply grease ( #247、P/N 017-30835-02 ) to the pump's crosshead bearings and the
cam.
Points Where Grease Is Applied (Same on Opposite Side)
NOTE
• When applying grease, be careful not to inadvertently apply grease to the photosensor.
6) Return parts to their original positions by performing the above steps in reverse.
7) Turn ON the power to the module and confirm that it starts up normally.
5.2.7 Converging Block (P/N 228-42255)
Converging Block (Left: Cross Section; Right: Back)
NOTE
• The converging block is used only in the LC-20AB.
Replacement Period
7 years min.
Replacement Procedure
1) Remove the converging block together with the mounting fixture by performing steps 1 to 9
of the "5.2.5.1 Replacement" procedure under "5.2.5 Pressure Sensor Assembly (P/N
228-45552-95)".
2) Remove the four screws, remove the converging block, and replace it with a new one.
3) Return the module to its original state by performing step 1 in reverse.
5.3 Fan Mounting Plate (P/N 228-42147)
1) Remove the two screws behind the cover and remove the cover.
2) Remove the cable that is connected to the CPU board and passes over the fan holder as well
as the fan cable's connector (J14), and remove the cable clamp.
3) Remove the three screws and remove the fan holder.
LC-20AD/ AB Service Manual
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Chapter 5: Assembly and Disassembly
Fan Mounting Plate (LC-20AD)
5.4 Switch Assembly (P/N 228-42287-91)
1) Remove the two screws on the back and remove the cover.
2) Remove the fan holder using the procedure described under "5.3 Fan Mounting Plate (P/N
228-42147)".
3) Remove the cable connected to the power-supply board (P/N (AD) 228-80426-61/ (AB)
228-80427-61) and AC inlet (filter) and to the switch assembly.
4) Remove the two screws at the bottom of the module that secure the switch assembly.
5) Remove the switch assembly by pulling it backwards together with the switch rod.
6) Remove the two screws and remove the switch assembly.
7) Mount the new switch assembly and secure it to the chassis by performing steps 3 to 5 in
reverse.
8) Perform mounting adjustment with reference to the following diagram.
1.5 to 2 mm
when switch is ON
Switch Adjustment Position
9) Mount the fan holder and reattach the cover.
5.5 Cooling Fan (P/N 228-25246-91)
Period
Clean every three years.
Replacement Procedure
1) Remove the two M4 screws behind the cover and remove the cover.
2) When only cleaning the cooling fan, remove dust from the fan in this state, i.e., without
detaching it from the module.
3) When replacing the cooling fan, detach it together with the fan holder using the procedure
described under " 5.3 Fan Mounting Plate (P/N 228-42147) " and then remove the two
screws.
Mount the new cooling fan by performing the relevant steps in reverse.
LC-20AD/ AB Service Manual
5-14
Chapter 5: Assembly and Disassembly
5.6 Replacing the Fuse
Refer to "8.9 Replacement of Fuse" in the Instruction Manual for details.
5.7 Replacing the PCB
5.7.1 MAIN PUMP Board
5.7.1.1 Replacement
The EEPROM must be reinserted after replacing the PCB.
The parameters are stored in the EEPROM and so they can be transferred by inserting the
previous EEPROM in the new PCB. Replace the EEPROM if it is faulty.
Structure and Maintenance of Flow-line Parts
Possible causes of unstable flow rates include liquid leakage and changes in flow-line
resistance. These problems can be identified by recording the waveform of the pump's
discharge pressure or by visual inspection. Methods for identifying and handling
abnormalities in flow-line parts and for performing maintenance and inspection are
explained here in the order corresponding to the flow of the carrier liquid.
Liquid leakage is difficult to identify when using a volatile solvent as the carrier liquid and
so replace it with well-degassed distilled water and perform inspection at a pressure close to
the maximum operating pressure.
Replacement Period
7 years
Replacement Procedure
1) Turn OFF the power to the module and remove all the cables connected to the back.
2) Remove the two M4 screws behind the cover and remove the cover. If there is an
optional CBM-20Alite board, remove it using the procedure described under " 5.7.3
CBM-20Alite (P/N 228-45011-31) ".
3) Remove all cables connected to the PCB.
4) Remove the two screws securing the metal plate to which the PCB is attached, remove
the two screws securing the board at the back, and remove the PCB together with the
metal plate. Note that the GND cable is secured together with the PCB at one place
inside the module.
MAIN PUMP Board (AD)
5) Mount the new PCB by performing step 4 in reverse. Do not forget to secure it together
with the GND cable.
6) Connect all the cables that are connected to the PCB.
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Chapter 5: Assembly and Disassembly
7) If there is an optional CBM-20Alite board, mount it using the procedure described
under " 5.7.3 CBM-20Alite (P/N 228-45011-31)".
8) Mount the cover by performing step 2 in reverse.
9) Reconnect all the cables that were connected to the back of the module.
10) Turn ON the power to the module while pressing the function key and confirm that it
starts up normally.
5.7.2 Power-supply Board
5.7.2.1Power Supply, LEA75F-24 (Part No. 074-80426-61(D)), LEA100F-24 (Part
No. 074-80427-61(B))
1) Remove the MAIN PUMP board using the procedure described under " 5.7.1.1
Replacement".
2) Remove the two connectors connected to the power-supply board.
3) Remove the four screws and remove the power-supply board.
Power Supply, LEA75F-24 Board
4) Mount the new power-supply board and return the module to its original state by
performing steps 1 to 3 in reverse.
5.7.3 CBM-20Alite (P/N 228-45011-31)
NOTE
• If the optional CBM-20Alite is used together with the module, the CBM board must be
removed before removing the PCB's connectors.
1) Turn OFF the power to the module and remove the AC cable connected to it.
2) Remove the two M4 screws behind the cover and remove the cover.
3) Remove the blind panel attached to the back of the chassis with four M3 × 8 screws.
The screws removed here are used again in step 6.
4) Connect the cable provided with the CBM-20Alite to connector J9 (when using the
LC-20AB) or J11 (when using the LC-20AD or the LC-20AT) on the main PCB.
5) Mount the CBM-20Alite onto the chassis from the inside and secure it with the four
screws removed in step 3. Connect the opposite end of the cable connected in step 4 to
connector J8 on the CBM-20A CPU board.
LC-20AD/ AB Service Manual
5-16
Chapter 5: Assembly and Disassembly
6) The state with the CBM-20Alite mounted to the module is shown below. (The state for
the LC-20AT is shown here as an example; the states for the LC-20AD and LC-20AB
are basically the same). Run the cables in the way shown below.
7) Reattach the cover.
8) Turn ON the power to the module and, viewing from the back, confirm that the
CBM-20Alite's LINK, ACT, and 100M indicators turn ON. (It is sufficient for any one
of these indicators to turn ON.)
5.7.4 FCV Board (P/N 228-34500)
When adding an FCV as an option, in addition to the PCB inside the module, it is also necessary
to install the FCV control board. This board is installed on the left side of the module interior as
viewed from the front of the module.
Refer to the instruction manual provided with the Gradient Valve kit for details.
FCV BOARD
5.8 Front of Module
5.8.1 Panel Assembly (P/N 228-43200-91 (AD)、-93 (AB))
Replacement Period
7 years min.
Replacement Procedure
1) Turn OFF the power to the module and remove the AC cable connected to it.
2) Open the right panel.
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Chapter 5: Assembly and Disassembly
3) Remove the two M4 screws behind the cover and remove the cover.
4) If there is an optional CBM-20Alite board, remove it using the procedure described under
"5.7.3 CBM-20Alite (P/N 228-45011-31)".
5) Remove the connector (J12) that is connected to the main PCB. Remove the clamper for the
corresponding cable.
6) Remove the two screws securing the left panel hinges and remove the panel.
NOTE
• There is a nut in the hinge. Be careful not to lose the nut when removing the hinge.
7) Pull the left panel's cable through the hole in the main frame's switch section. Pull the
connector through by orienting it horizontally.
8) Pass the cable connector of the new left panel through main frame's switch section by
orienting it horizontally, and connect it to the main PCB.
9) Clamp the cable.
10) Mount the left panel's hinge to the main frame.
11) When using an optional CBM-20Alite board, mount it using the procedure described under
"5.7.3 CBM-20Alite (P/N 228-45011-31) ".
12) Reattach the cover by performing step 3 in reverse.
13) Refer to "5.8.2 Front Panel Adjustment Procedure " below for details on performing
adjustment after mounting.
14) Turn ON the power to the module and confirm that it starts up normally.
LC-20AD/ AB Service Manual
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Chapter 5: Assembly and Disassembly
5.8.2 Front Panel Adjustment Procedure
When replacing the door of the front panel, or if its position shifts over a long period of use,
follow the following procedure to adjust it.
NOTE
• When adjusting, use the following jigs.
・ Jig, right upper hinge (P/N 228-43222-91)
・ Jig, right lower hinge (P/N 228-43223)
Front panel adjustment procedure diagram
Attaching the control panel ASSY (right door)
1) Press the hinge in the direction indicated by [A] in the diagram, and insert it to the base of
the shaft.
2) While adjusting the heights of both sides of
2
1
in the diagram below, fix the location of
on the main unit, and attach by tightening the screw.
Detail 1
Detail
2
NOTE
• Grasp the driver with the thumb, middle finger and index finger, and tighten it until it is
firmly in place.
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Chapter 5: Assembly and Disassembly
Temporarily placing the right hinge (top and bottom)
3) Attach the right panel ASSY, and place the upper left part of the right door on
3
of the
diagram below. Tighten the screw lightly.
Detail
3
Attaching the upper right hinge
5) Insert the upper right hinge jig (P/N 228-43222-91) in
4
and
5
in the figure below
(hatched parts in the figures).
6) While pressing the right panel ASSY (right door) onto the jig, press the upper right hinge in
the direction of each screw [B][D], and hold while tightening the screws.
Detail 3-(1)/(2)
Detail
LC-20AD/ AB Service Manual
5-20
5
Chapter 5: Assembly and Disassembly
Attaching the lower right hinge
7) Insert the lower right hinge jig (P/N 228-43223) in
7
of the diagram below (hatched
parts in the diagram).
Detail
7
NOTE
• When
6
in the diagram below (opening between the right panel bearing and lower right
hinge) is 0.6 mm or greater, insert a 0.5 mm right hinge shim (P/N 228-43224) between the
chassis and the lower right hinge.
8) While pressing the right panel against the jig, push the lower right hinge in the direction of
the screws [C] [E], and tighten the screws.
NOTE
• When tightening the screws, make sure that the right panel does not lift up at
3
and
8
due to rotation of the lower right hinge.
• Due to the gutter between the hinge and right panel, the right panel will lean under its own
weight and will contact
3
to align the top surface ( ± about 0.1 mm depending on the
intersection).
LC-20AD/ AB Service Manual
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Chapter 5: Assembly and Disassembly
9) When attached, check the following.
5.8.3 Leak-sensor Assembly (P/N 228-39247-92)
Replacement Procedure
1) Turn OFF the power to the module and remove the AC cable connected to it.
2) Remove the two M4 screws behind the cover and remove the cover.
4) Remove the connector (AD: J1/AB: J10) that is connected to the main PCB. Remove the
clamper for the corresponding cable.
LC-20AD/ AB Service Manual
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Chapter 5: Assembly and Disassembly
5) Remove the M3 screws securing the leak-sensor assembly and remove the leak-sensor
assembly.
Leak Sensor
6) Perform adjustment after replacing the leak-sensor assembly with reference to the following
diagram.
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Chapter 5: Assembly and Disassembly
- blank page -
LC-20AD/ AB Service Manual
5-24
Chapter 6: Maintenance and Adjustment
Chapter 6: Maintenance and Adjustment
6.1 Maintenance Commands
Overview:
The LC-20AD/ AB incorporates the maintenance functions described below.
Startup method:
Turn ON the power while pressing [func] to add the functions to start up in special mode
(FACTORY) and add several functions.
NOTE
• Items marked * are maintenance commands. They are not usually displayed on the screen.
• The LC-20AB incorporates two pumps, pump A and pump B, and there are some items that
allow settings for the two pumps to be made separately. This is indicated by "(A, B)" where
applicable.
6.1.1 FUNC/ PARAMETER GROUP
Refer to "5.2.3 List of Auxiliary Functions" in the Instruction Manual for details.
6.1.2 FUNC/ FILE GROUP
Refer to "5.2.4 List of Auxiliary Functions" in the Instruction Manual for details.
6.1.3 FUNC/ CONTROL GROUP
Refer to "5.2.5 List of Auxiliary Functions" in the Instruction Manual for details.
LC-20AT Service Manual
6-1
Chapter 6: Maintenance and Adjustment
6.1.4 FUNC/ SYSTEM GROUP
Command
name
Setting
range
Increment Description
1
LOCAL
0, 1
1
2
ADRS
1 to 12
1
3
KEY CLOSE
4
BRIGHT
1 to 4
1
5
EXT-S
0 to 3
1
6
SYS (*)
2 to 6
1
7
S-PROT
0, 1
1
8
FCV TYPE
0, 1
1
9
PRS-UNIT
0 to 3
1
10
RANGE
1 to 10
1
11
CBM LINK
0, 1
1
Operation/
display
Numeric
keypad
0: Controlled from the SCL.
1: Controlled from the module itself (i.e., local mode).
Default value = 3
Numeric
Used to set the address of the module for control from the
keypad
system controller.
Used to disable the keypad.
Enter key
Default value = 3
Numeric
Used to set the screen brightness.
keypad
The settings 1 (dark) to 4 (bright) are available.
0: Relay contacts controlled by EVENT values.
Numeric
1: Contact 1 used as time-program start signal.
2: Contact 2 used as error output signal.
keypad
3: Both functions 1 and 2.
Default value = 1 (LC-20AD: 1, LC-20AB: 2)
1: Isocratic mode
2: High-pressure GE mode (normal mode)
Numeric
4: Low-pressure GE mode (not applicable for LC-20AB)
keypad
5: High-pressure GE mode (RS-232C mode)
6: Low-pressure GE mode (not applicable for LC-20AB)
Default value = 0
Numeric
0: System-protect function disabled
keypad
1: System-protect function enabled
Default value = 0
Numeric
FCV selection
0: FCV-10AL
keypad
1: FCV-11AL
Default value = 0
Pressure values must be converted in accordance with the
setting.
Numeric
0: MPa
keypad
2
1: kgf / cm
2: bar
3: Psi
Default value = 10
Numeric
keypad
Recorder range: RANGE × 5.0 MPa/ FS
Default value = 1 (Ext.)
Numeric
keypad
Used to set the CBM's link destination.
LC-20AD/ AB Service Manual
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Chapter 6: Maintenance and Adjustment
6.1.5 FUNC/ MONITOR GROUP
Command
Name
Setting Increment
Range
1
MON TIME
0、1
1
2
MON FLOW
0、1
1
3
MON ID
0、1
Display setting for the elapsed time when running a time program
Default value = 0
0: Clear (not displayed)
1: Set (displayed)
Display setting for the flow rate in constant-pressure delivery mode
0: Clear (not displayed)
1: Set (displayed)
Display setting for the pump ID when operating under remote control
Default value = 0
0: (not displayed)
1: (displayed)
[NO LINK] or [LOCAL] is displayed if no system controller is
connected.
Display setting for the solenoid valve unit's flow line
Default value = 0
0: Clear (not displayed)
1: Set (displayed)
Display setting for the pump's revolution counter
Default value = 0
0: Clear (not displayed)
1: Set (displayed)
Display setting for the plunger position
Default value = 0
0: Clear (not displayed)
1: Set (display only on service mode)
Used to display the module's status.
Display setting for degasser pressure when using degasser
If no degasser is connected, [NOT CONNECTED] is displayed.
If the degasser is OFF, [POWER OFF] is displayed.
1
4
MON SV
0、1
1
5
MON REV
0、1
1
6
MON PLNGE
0、1
(*)
1
6
CONDITION
None
7
DEGAS PRS
None
Description
Operation/
Display
Numeric
keypad
Numeric
keypad
Numeric
keypad
Numeric
keypad
Numeric
keypad
Numeric
keypad
Display
Display
6.1.6 FUNC/ FACTORY GROUP
Setting range
Increment
Description
The pump's flow rate fluctuates according to the value.
1
ALPHA (A, B)
0.00 to 9.99
0.01
2
PRS-5
1 to 9,999
1
3
PRS-1
1 to 9,999
1
4
HP- (A, B) L
4,000 to 4,600 1
5
HP- (A, B) R
800 to 1,400
6
P (A, B) -CALIB
0 to 2
1
(0 to 3 for PB)
7
(P)
8
COMP-P
0
---
9
L-CAL
---
---
10 PTEST
0 to 9,999
1
11 D-SUB TEST
---
---
1
Input the value that appears on the label after replacing the
pressure sensor.
Input the value that appears on the label after replacing the
pressure sensor.
The value measured before delivery appears on the pump
body.
The value measured before delivery appears on the pump
body.
Used to set the cam table.
0: Calibration stopped
1: Calibration started for LC-20AB pump A (B)
2: Calibration values for LC-20AB pump A (B) cleared
3: LC-20AB pump B's calibration values transferred to
pump A
The angle, compensation value, and number of steps are
displayed.
Used to display the pressure monitor value and pressure
fluctuation width.
Used to display the number of pulses in the
compressibility-compensation interval.
Used to display the calibration values and to perform
calibration of the leak sensor.
Default value = 0
The voltage between the PRESS terminal and the earth
terminal for an input value of 2,000 is 1 ±0.01 mV.
Command for checking the PCB
Operation/
display
Numeric
keypad
Numeric
keypad
Numeric
keypad
Numeric
keypad
Numeric
keypad
Numeric
keypad
Enter key
Numeric
keypad
LC-20AT Service Manual
6-3
Chapter 6: Maintenance and Adjustment
6.1.7 VP function
Except for the following command, details on VP functions can be found under "5.3 VP
Functions" in the Instruction Manual.
m
10
Setting range
Increment
CLEAR ALL
(*)
Description
Operation/
display
Parameters, time programs, count values, and
Enter key
each log must be initialized or reset.
6.1.8 CALIBRATION/ CBM PARAMETER
Command name
Description
1
SERIAL NUMBER
Used to display the CBM's serial number
2
S/W ID
3
INTERFACE
4
ETHERNET SPEED
5
USE GATEWAY
6
IP ADDRESS
Used to display the CBM's program version
Used to set the protocol used for communicating with the data processor
0: Connected via optical cable
1: Connected via serial communications (RS-232C)
2: Connected via Ethernet
Used to set the Ethernet communications speed. *1
0: Automatic recognition
1: 10 Mbps, Half Duplex
2: 10 Mbps, Full Duplex
3: 100 Mbps, Half Duplex
4: 100 Mbps, Full Duplex
Used to specify whether or not the default gateway is used. *1 *2
0: Not used
1: Used
Used to set the CBM's IP address. *1
7
SUBNET MASK
8
TRS MODE
Used to set the subnet mask. *1
Used to make settings for serial communications.
0: Connected by manual settings at the CBM
2: Connected to CLASS-VP5/6
3: Connected to LCsolution
11: Connected C-R8A
12: Connected to C-R7A/C-5A
13: Connected to C-R4A
14: Connected to C-R6A (without expansion board)
15: Connected to C-R6A (with expansion board)
CAUTION
Do not use any settings other than those shown above.
Otherwise, the system may not operate properly.
*1: These settings are only displayed and cannot be set if "change not possible" is set at the CBM-20A/ 20Alite
*2: This setting cannot be used if "default gateway [NONE]" is set. The parameters are enabled after the CBM's power
supply is reset.
6.2 Performance Inspection
Being able to ascertain the carrier liquid's flow speed and whether or not the mobile phase is stable
(flow-rate stability) is a necessary requirement for obtaining accurate data related to the retention
time, the peak height and peak area, which is used to perform qualitative analysis.
6.2.1 Inspection of Flow-rate Accuracy
The methods for measuring the flow rate of a carrier liquid include volumetric measurement,
gravimetric measurement, and measurement using a flow meter. Volumetric measurement (where
carrier liquid is collected in a measuring container for a certain period), which is the most
commonly used method, is described here.
Measuring equipment:
10-ml measuring flask and stopwatch
(Gravimetric measurement using an electronic balance is employed
for measurement at the factory before delivery.)
LC-20AD/ AB Service Manual
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Chapter 6: Maintenance and Adjustment
Carrier liquid:
Flow-rate setting:
Flow-rate setting accuracy:
Resistance column:
Distilled water
1.0 ml/min
±2%
Capillary tubing (of different sizes)
Example
Flow-rate setting
(ml/ min)
1
Resistance column (tubing) used:
Outer diameter (mm) × Inner diameter (mm) × Length (m)
1.6 × 0.1 × (2 to 4)
Reference value:
Pump pressure (kgf/ cm2)
25 to 50
NOTE
• The pump pressure varies with the temperature of the carrier liquid and the inner diameter of
the tubing used.
• The resistance tubing will be suitable if the specification above is satisfied.
• Measurement is possible with the column normally used.
6.2.2 Adjusting the Flow Rate
Adjust the flow rate in order to readjust the flow-rate setting accuracy or to increase the
accuracy to a level exceeding the product specifications.
Adjustment Procedure
1) Make the appropriate preparations for recording the pump pressure with the recorder.
2) Fill the pump's flow lines and reservoir with well-degassed water.
3) Connect tubing of dimensions 1.6 mm (outer diameter) × 0.1 mm (inner diameter) × 2 to 4
MT (length) in series to the pump's discharge outlet, set the flow rate to 5 ml/min, and
check that the pressure recording is stable.
4) Change the flow rate to 1 ml/min and wait for it to stabilize. Measure the flow rate twice
over 5-minute periods. (An electronic balance is used to measure the discharge volume at
the factory before delivery.)
5) Obtain the average of the two measurements, calculate the difference between the measured
flow rate and 1 ml/ min, and set the ALPHA value.
6) Measure the flow rate again twice over 2-minute periods at a flow-rate setting of 1 ml/ min.
Check that the average value is within the range 1 ±0.01 mL/ min ml/min. (The specified
level of accuracy is ±2% but perform adjustment so as to attain a higher level of accuracy.)
6.2.3 Fine Adjustment of the Pulsation Width
The pump's most important function is to pump carrier liquid at a constant flow speed. A
flow-rate precision level of 0.5% to 1% is required.
If the pumping mechanism is damaged, the carrier flow-rate fluctuates, and it is very difficult to
accurately gauge the degree of fluctuation.
With the LC-20AD/ AB, the pump's operating status is inspected using the pressure waveform
obtained by recording the pump's discharge pressure (column-inlet pressure).
LC-20AT Service Manual
6-5
Chapter 6: Maintenance and Adjustment
6.2.3.1 Connecting the Pressure-recording Cord
With the LC-20AD/ AB, changes in pressure can be observed by displaying the actual
pressure value (kgf/ cm2) on the display panel. It is also possible to record pressure values to
a recorder with a full scale of 1 mV using a span of 500 kgf/ cm2 (, full scale (or increments
of 50 kgf/ cm2, depending on the RANGE setting). In this case, connect the
pressure-recording cord to the external I/O terminal.
6.2.3.2 Example of Pressure-waveform Recording
Example of Waveform Showing Normal Pumping Operation and Stable Flow Rate
There is no vertical disturbance in the pressure pulse and it is stable over a long period.
It is also suitable for the pressure test.
Carrier liquid
H2 O
Flow rate
1.0 mL /min, approx. 60 kg/ cm2
Resistance column
Tubing of dimensions 0.1 mm (inner dia.) × 4 m
Example of Waveform Showing Irregular Pumping Operation and Fluctuating Flow
Rate
This irregularity was caused by directly replacing the original carrier liquid, H2O, with
n-hexane without rinsing with a miscible, intermediate rinse solution. The balls and ball
sheets were also dirty, and were cleaned using isopropyl alcohol.
Carrier liquid
n-hexane
Flow rate
1.0 mL/ min, approx. 60 kg/ cm2
Resistance column
Tubing of dimensions 0.1 mm (inner dia.) × 4 m
Examples of Pressure Waveforms Together with Probable Causes and Corrective Action
Pressure waveform
Slowly regressing spikes
appear at the bottom
Several needle-shaped spikes
appear at the bottom.
The pressure waveform is
completely irregular.
The pressure exhibits
repeated, sudden drops.
The pressure waveform
exhibits undulations.
Cause
Corrective action
・ Air is dissolved in the carrier liquid. ・ Degas the carrier liquid.
・ There are bubbles in the pump heads ・ Increase the flow rate of the
or the check valves.
carrier liquid from the drain
outlet.
・ Air is sucked in through a plunger ・ Replace the plunger seal.
seal.
・ Liquid is leaking from a plunger ・ Replace the plunger seal.
seal.
・ Air is sucked in between the suction ・ Perform inspection and tighten
filter and the check valve.
the connections.
・ The interiors of the pump heads and ・ Increase the flow rate and the
the check valves are dirty.
pressure and rinse using isopropyl
alcohol.
・ A previously used, non-miscible
carrier liquid is still present.
・The contact surface of the ball and ・ Disassemble and clean the check
ball seat in a check valve is dirty
valve.
(e.g., due to foreign matter or water
scales).
・ A ball seat is damaged.
・ Replace the ball seat.
・ A check valve is not properly ・ Tighten the check valve.
tightened.
・ The line filter is clogged or there is a ・ Clean or replace the line filter.
change in resistance at a point in the ・ Replace the plumbing.
flow line (including the column).
・ The resistance in the column ・ This is not a malfunction.
changes due to changes in the
Stabilize the ambient temperature.
ambient temperature.
LC-20AD/ AB Service Manual
6-6
Chapter 6: Maintenance and Adjustment
6.2.4 Calibrating the Pulsation Width
NOTE
• There are some places of the procedure that differ for the LC-20AD and LC-20AB. At these
parts, the steps are divided into two parts, which are labeled "AD:" and "AB:" as
appropriate.
• Degas the mobile phase used by passing it through a degasser.
6.2.4.1 Preparation
Required Parts
・ Chromatopac (e.g., C-R6A)
・ Resistance tube 1 (for pumping IPA at a flow rate of 4 to 5 ml/min and a pressure of 35 to
40 MPa)
・ Degasser
・ Liquid-passage test program (ZECP-P012)
・ Resistance tube 2 (for pumping at a flow rate of 0.1 ml/min and a pressure of 4 MPa)
・ Pulsation calibration jig (Part No. 228-45585-91)
・ Purified water
Procedure
1) Turn ON the power while pressing [func].
2) Press [func] repeatedly to display "PARAMETER".
3) AD: Press [enter] to enter the "PARAMETER" group, press [func] repeatedly to
display "COMP", and input "0.45".
AB: Press [enter] to enter the "PARAMETER" group, press [func] repeatedly to
display "ACOMP" and "BCOMP", and input "0.45" for both items.
4) AD: Replace the mobile phase with degassed water, open the drain valve, and purge for
3 minutes.
AB: Replace both mobile phases A (pump A) and B (pump B) with degassed water and,
at settings of B% = 0 and B% = 100, open the drain valve and purge for 3 minutes.
5) AD: Replace the resistance tube with one of dimensions 0.1 dia. × 3 to 4 MT, close the
drain valve, and pump at a flow rate of 1 ml/min.
AB: Replace the resistance tube with one of dimensions 0.1 dia. × 3 to 4 MT and, at a
setting of B% = 0, close the drain valve and pump at a flow rate of 1 ml/min.
6) Plot the pressure waveform for 30 minutes.
7) After 30 minutes, check that the pressure waveform (i.e., the pulsation width) is
constant.
8) AB: Repeat steps 5 to 7 with a setting of B% = 100 and check the pressure waveform.
6.2.4.2 Calibration
Calibrate the pulsation width using the following procedure.
1) Turn OFF the power, remove the two M4 screws behind the cover and remove the
cover.
2) AD: Remove the plumbing running from the OUT-side check valve to the
pressure-sensor assembly and mount the pulsation calibration jig.
AB: Remove the plumbing running from the converging block to the pressure-sensor
assembly and mount the pulsation calibration jig.
LC-20AT Service Manual
6-7
Chapter 6: Maintenance and Adjustment
3) Connect the pressure sensor's cable running from the pulsation calibration jig to the
pump's main board.
4) Connect the resistance tube (water, 0.1 ml/min, 4 MPa) to the pulsation calibration jig.
Pulsation calibration jig
Pressure-sensor assembly
Resistance tube
LC-20AD's Pulsation Calibration Jig
Pulsation calibration jig
Pressure-sensor assembly
Resistance tube
LC-20AB's Pulsation Calibration Jig
5) Turn ON the power while pressing [func]. Perform steps 2 and 3 of the previous
procedure and check that the "COMP" value is 0.45.
6) Press [back] to display "FACTORY".
7) Press [enter] to enter the "PARAMETER" group, press [func] repeatedly to display
"PRS-5" and "PRS-1", and input the parameter values that appear on the pulsation
calibration jig's pressure-sensor label.
8) Make the following settings and start recording pressure signals with the recorder.
Model
Flow rate
B% (LC-20AB only)
Range
Chart speed
LC-20AD
0.1 mL/ min
−
1 (5 MPa, full scale)
2.5 mm/ min
LC-20AB
0.1 mL/ min
0
1 (5 MPa, full scale)
2.5 mm/ min
9) Record the pressure waveform for 10 minutes.
10) After completion, check that the pressure waveform (pulsation width) is constant.
LC-20AD/ AB Service Manual
6-8
Chapter 6: Maintenance and Adjustment
NOTE
• If the pulsation width changes, it is possible that bubbles have built up in the pulsation
calibration jig. Increase the flow rate and flush out the bubbles.
• If there is irregular fluctuation, clean the check valves, tighten the connections, repeat the
procedure up to this point, and check the pressure waveform.
11) Press [func] repeatedly to display "FACTORY" and press [enter] to enter the
"FACTORY" group.
12) AD: Press [func] repeatedly to display "P-CALIB".
AB: Press [func] repeatedly to display "PA-CALIB".
13) AD: Input "1" for "P-CALIB" while the pressure waveform is recorded to start
calibration.
AB: Input "1" for "PA-CALIB" while the pressure waveform is recorded to start
calibration.
14) AD: After approx. 10 minutes, calibration is completed and the motor runs in a way
that minimizes pulsation.
AB: After approx. 10 minutes, calibration of pump A is completed and the motor runs
in a way that minimizes pulsation.
Start of calibration
Completion of calibration
15) AD: Stop pumping and turn OFF the power.
AB: Stop pumping with pump A and turn OFF the power.
NOTE
• The procedure for the LC-20AD continues from step 22.
16) AB: Remove the two connectors that are connected to the board from pump A's pump
assembly.
17) AB: Similarly, remove the two connectors from pump B's pump assembly and connect
them to the connectors for pump A. Leave pump A's connectors disconnected.
18) AB: Turn ON the power while pressing [func].
19) AB: Perform calibration for pump B by performing steps 8 to 14. Input "1" for
"PB-CALIB" in steps 12 and 13.
NOTE
• Do not input "1" for "PA-CALIB" after completing calibration for pump A.
20) AB: Stop pumping with pump B and turn OFF the power.
21) AB: Reconnect the connectors for each pump in their original positions.
22) Remove the jig's pressure sensor from the pump's main board and reconnect the
original pressure sensor.
23) Reconnect the plumbing.
24) Turn ON the power while pressing [func].
25) AD: Perform steps 2 and 3 in "6.2.4.1 Preparation" and check that the "COMP" value
is 0.45.
LC-20AT Service Manual
6-9
Chapter 6: Maintenance and Adjustment
AB: Perform steps 2 and 3 in "6.2.4.1 Preparation" and check that the "ACOMP" and
"BCOMP" values are both 0.45.
26) Input the values for the original pressure sensor for "PRS-1" and "PRS-5" by
performing step 7.
27) In the "FACTORY" group, press [func] repeatedly to display the pressure/pulsation
monitor screen, and check the pulsation value.
Criteria
Model
LC-20AD
LC-20AB
Flow rate
B% (AB only)
1 mL/ min
−
Pulsation value
0.05 MPa max.
0.1 mL/ min
−
0.05 MPa max.
1 mL/ min
0%
0.05 MPa max.
1 mL/ min
100%
0.05 MPa max.
0.1 mL/ min
0%
0.05 MPa max.
0.1 mL/ min
100%
0.05 MPa max.
6.2.5 Checking the Concentration for a High-pressure Gradient System
NOTE
• Before checking the high-pressure gradient concentration, check the SPD absorbance
linearity.
Required Parts
・ High-pressure gradient system: Solvent delivery pump (only AD) and gradient mixer
・ UV detector: SPD-10A, SPD-10Avp, or SPD-20A-series detector
・ Data processor: Chromatopac, LC workstation, etc.
・ Resistance tube
・ Liquid A:
Purified water (degassed), 500 ml
・ Liquid B:
Aqueous caffeine solution (10 mg/ l, degassed), 500 ml
When using Shimadzu's standard reagent for performance inspection:
Measure out 20 ml of caffeine (250 mg/ l, Part No. 228-45725-06) and add water
to make a total volume of 500 ml.
When prepared by the customer:
Weigh out 20 mg of anhydrous caffeine, put it in a 100-ml measuring flask, and
dissolve it in water to make a total volume of 100 ml. Measure out 25 ml of this
solution and add water to make a volume of 500 ml.
Measurement Procedure
1) Connect the resistance tube between the mixer's outlet (1.7 ml) and the detector.
2) As mobile phases, prepare purified water for liquid A and aqueous caffeine solution for
liquid B (500 ml each).
3) Degas the mobile phases.
4) Open the drain valve, press [purge] for both solvent delivery pumps A and B to refill each
pump's flow lines.
5) Set the pumping conditions in following way and press [pump] to pump until the detector
baseline stabilizes.
Total flow rate = 3 ml/min
Concentration of liquid B = 50%
6) Set the parameters of the control device in the following way and pump until the baseline
stabilizes.
LC-20AD/ AB Service Manual
6-10
Chapter 6: Maintenance and Adjustment
・Pumping system
Pumping mode: B.GE (AD)/ Binary Pump (AB)
Flow rate: 2.0 ml/min
Concentration of mobile phase B: 0.0%
・UV detector
Wavelength: 272 nm
Response: 3 (0.5 sec)
AUX RANGE: 2 (1.0 AU/ V)
・Data processor
1.024 mAU full scale (for Chromatopac, ATTEN = 10)
(With LCsolution, the intensity axis is set automatically.)
Chart speed: 5 mm/min (for Chromatopac, SPEED = 5)
7) Set the following time program as the gradient program.
・ If the system is controlled from a system controller or an LC workstation, select "Time
Program" from the corresponding menu and create the program.
・ If the system is controlled from the pumps, create the "Time Program" at the pumps.
If the "GE TEST PROGRAM" VP function is executed, this time program is
automatically copied to the file of the specified number.
Time Program
TIME
FUNC
VALUE
5.00
B.CONC
0.0
5.01
B.CONC
10.0
10.00
B.CONC
10.0
10.01
B.CONC
50.0
15.00
B.CONC
50.0
15.01
B.CONC
90.0
20.00
B.CONC
90.0
20.01
B.CONC
100.0
25.00
B.CONC
100.0
25.01
B.CONC
0.0
30.00
STOP
8) If Chromatopac is used as the data processor, create the corresponding [BASIC program]
shown below, which prints the signal at 30-second intervals.
C-R8A/ R7A/ R4A
C-R3A/ R6A
C-R5A
10
LPRINT LEVEL(1);
10 PRINT LEVEL;
10 LPRINT LEVEL;
20
WAIT 30
20 WAIT 30
20 WAIT 30
30
GOTO 10
30 GOTO 10
30 GOTO 10
40
END
40 END
40 END
9) Zero the baseline, start plotting at the data processor, and execute the gradient time program.
If Chromatopac is used as the data processor, start the [BASIC program].
10) Measure the signal level at each concentration setting and calculate the actual concentration.
NOTE
• Measure the signal level at points where the baseline stabilizes.
LC-20AT Service Manual
6-11
Chapter 6: Maintenance and Adjustment
Calculation Method
11) When using the LC-20AD in a high-pressure gradient system based on three liquids, replace
liquid B (pump B) with liquid C (pump C) and test in the same way.
CHECK CRITERIA
Within ±1.0% of set value
6.2.6 Checking the Concentration for a Low-pressure Gradient System
(only for LC-20AD)
Required Parts
・ Low-pressure gradient system: Solvent delivery pump and gradient mixer
・ UV detector:
SPD-10A, SPD-10Avp, or SPD-20A-series detector
・ Data processor:
Chromatopac, LC workstation, etc.
・ Resistance tube
・ Liquid A:
Purified water (degassed), 500 ml
・ Liquids B, C, and D: Aqueous caffeine solution (10 mg/ l, degassed), 500 ml
When using Shimadzu's standard reagent for performance inspection:
Measure out 20 ml of caffeine (250 mg/ l, Part No. 228-45725-06) and
add water to make a total volume of 500 ml.
When prepared by the customer:
Weigh out 20 mg of anhydrous caffeine, put it in a 100-ml
measuring flask, and dissolve it in water to make a total volume of
100 ml. Measure out 25 ml of this solution and add water to make
a volume of 500 ml.
Measurement Procedure
1) Connect the resistance tube between the mixer's outlet (1.7 ml) and the detector.
2) As mobile phases, prepare purified water for liquid A and aqueous caffeine solution for
liquids B, C, and D (500 ml each).
3) Degas the mobile phases and refill four pump's flow lines with each mobile phase.
4) Set the pumping conditions in following way, open the drain valve, and pump for 5 minutes.
Total flow rate = 9 ml/min
Concentration of liquid B = 25.0%
Concentration of liquid C = 25.0%
Concentration of liquid D = 25.0%
5) Change the flow rate to 3.0 ml/min, close the drain valve, and pump until the baseline
stabilizes.
LC-20AD/ AB Service Manual
6-12
Chapter 6: Maintenance and Adjustment
6) Set the parameters of the control device in the following way and pump until the baseline
stabilizes.
・Pumping system
Pumping mode: LP.GE
Flow rate: 2.0 ml/min
Concentration of mobile phase B: 0.0%
Concentration of mobile phase C: 0.0%
Concentration of mobile phase D: 0.0%
・UV detector
Wavelength: 272 nm
Response: 3 (0.5 sec)
AUX RANGE: 2 (1.0 AU/ V)
・Data processor
1.024 mAU full scale (for Chromatopac, ATTEN = 10)
(With LCsolution, the intensity axis is set automatically.)
Chart speed: 5 mm/min (for Chromatopac, SPEED = 5)
7) Set the following time program as the gradient program.
・ If the system is controlled from a system controller or an LC workstation, select "Time
Program" from the corresponding menu and create the program.
・ If the system is controlled from the pumps, create the "Time Program" at the pumps.
If the "GE TEST PROGRAM" VP function is executed, this time program is
automatically copied to the file of the specified number.
Time Program
TIME
FUNC
VALUE
5.00
B.CONC
0.0
5.01
B.CONC
10.0
10.00
B.CONC
10.0
10.01
B.CONC
50.0
15.00
B.CONC
50.0
15.01
B.CONC
90.0
20.00
B.CONC
90.0
20.01
B.CONC
100.0
25.00
B.CONC
100.0
25.01
B.CONC
0.0
30.00
STOP
8) If Chromatopac is used as the data processor, create the corresponding "BASIC program"
shown below, which prints the signal at 30-second intervals.
C-R8A/ R7A/ R4A
C-R3A/ R6A
C-R5A
10
LPRINT LEVEL(1);
10 PRINT LEVEL;
10 LPRINT LEVEL;
20
WAIT 30
20 WAIT 30
20 WAIT 30
30
GOTO 10
30 GOTO 10
30 GOTO 10
40
END
40 END
40 END
9) Zero the baseline, start plotting at the data processor, and execute the gradient time program.
If Chromatopac is used as the data processor, start the [BASIC program].
10) Measure the signal level at each concentration setting and calculate the actual concentration.
NOTE
• Measure the signal level at points where the baseline stabilizes.
LC-20AT Service Manual
6-13
Chapter 6: Maintenance and Adjustment
Calculation Method
11) Perform the test in the same way for the combination of A and C and the combination of A
and D.
CHECK CRITERIA
Within ±1.0% of set value
6.3 Pressure Sensor
The pressure measured by the LC-20AT's pressure sensor is obtained by amplifying the output
from a load cell pressure sensor, sending the signals to the CPU after A/D conversion, and
converting the signals to pressure values, which are then displayed.
Refer to “5.2.5 Pressure Sensor Assembly (P/N 228-45552-95)” for details on replacing the
pressure sensor.
6.3.1 Recorder Output Signals
Connecting a recorder to the pressure-monitor terminal on the back of the module makes it
possible to record the pressure signals. The full scale is 1 mV and so, when connecting to
Chromatopac, set the Chromatopac's ATTEN value to 0.
The output range can be set to one of 10 settings using the RANGE parameter (1 to 10).
Full scale = RANGE × 5 MPa (RANGE × 50 kgf/ cm2)
6.3.2 Setting Parameters after Replacing Pressure Sensor
The output voltages corresponding to pressures of 500 kgf/ cm2 appear on the pressure sensor's
label.
Input the PRS-1 and PRS-5 values after replacing the pressure sensor or PCB.
6.3.3 Zero Adjustment for Pressure Sensor
If a pressure value exceeding ±3 kgf/ cm2 is displayed when no pressure is applied, zero
adjustment of the pressure is necessary. Perform adjustment using the following procedure.
1) Stop pumping and open the drain valve (i.e. so that no pressure is applied).
2) Press func repeatedly to display [ZERO.ADJ] from the [CONTROL] screen. Press enter in
this state.
0.000 ZERO ADJ
ENTER to ZeroAdj
LC-20AD/ AB Service Manual
6-14
Chapter 7: Troubleshooting and Corrective Action
Chapter 7: Troubleshooting and Corrective Action
7.1 Problems and Corrective Action
This chapter explains how to identify the probable causes of problems from their symptoms.
For details on corrective action, refer to the relevant item either here or in the Instruction Manual.
CAUTION
• Problems have many possible causes and it is not possible to list all of them here. If the
problem is not resolved by taking corrective action, consult your Shimadzu representative.
Symptom
Power is not supplied
when the power switch
is set to ON.
Probable cause
Corrective action
The power plug is disconnected.
Connect the plug correctly.
There is a disconnection in the
Replace with a new cable of the same type.
power cable.
The power supply does not meet
Use a power supply that meets the specifications for the module.
the specifications for the module.
A fuse is blown.
Replace the fuse.
Press [pump]. The pump indicator turns ON.
[pump] was not pressed
(and so the pump indicator is OFF.) Start pumping from the system controller. *1
No solvent is pumped.
The flow rate is set to [0].
Set the flow rate.
Set the flow rate from the system controller. *1
An error message is displayed
(e.g., P-MAX or P-MIN).
The module is operating
but no solvent is
pumped.
Press [CE] and perform corrective action for the error.
Press [purge] to flush out the bubbles.
There are bubbles inside the pump
Connect a disposable syringe to the drain-tubing connection port and
heads.
draw out the bubbles.
Air is entering via the connection
between the suction filter and the Connect the suction filter's bushing securely.
pump inlet.
Press [purge] to flush out the bubbles.
There are bubbles inside the pump
Connect a disposable syringe to the drain-tubing connection port and
heads.
draw out the bubbles.
The previous mobile phase is still
Press [purge] to completely flush out the previous mobile phase.
present inside the pump heads.
Press [purge] to completely flush out the previous mobile phase.
There are bubbles inside the suction Shake the suction filter to drive out the bubbles.
filter's tubing.
Press [purge] to completely flush If the suction filter is clogged, perform ultrasonic cleaning. If this
does not work, replace the suction filter. *2
out the previous mobile phase.
Degas the mobile phase.
Pump isopropyl alcohol to clean the check valves.
Pumping is unstable and There is a faulty check valve.
there is large pulsation.
If pumping isopropyl alcohol does not work, either perform
ultrasonic cleaning or replace the corresponding check valve.
Liquid is leaking from the gap Replace the corresponding plunger seal.
between a pump head and a head
holder or from a rinse-solution If replacing the plunger seal does not work, replace the
corresponding plunger.
outlet.
Tighten the corresponding male nut.
Liquid is leaking from a flow-line
If
tightening the male nut does not work, replace the male nut and
connection.
ferrule.
The flow line is (partially) clogged.
Perform ultrasonic cleaning for the line filter or replace it.
Identify and replace the clogged part.
The service life of plunger seals has If the service life of plunger seals is extremely short, replace the
expired.
corresponding plunger.
LC-20AT Service Manual
7-1
Chapter 7: Troubleshooting and Corrective Action
Pump isopropyl alcohol to clean the check valves.
There is a faulty check valve.
The flow rate is below
the set value.
The suction filter is clogged. (*2)
If pumping isopropyl alcohol does not work, either perform
ultrasonic cleaning or replace the corresponding check valve.
Perform ultrasonic cleaning for the suction filter.
If ultrasonic cleaning does not work, replace the suction filter.
The retention time
cannot be reproduced.
In a high-pressure
gradient system, the 2
pumps show different
pressures.
(Differences of up to 20
kgf/ cm2 or 5% are
normal.)
Pump isopropyl alcohol to clean the check valves.
There is a faulty check valve.
The zeroes of the pressure sensors
Execute zero adjustment using the ZERO ADJ auxiliary function.
are different.
The line filter of one of the pumps
Perform ultrasonic cleaning for the line filter or replace it.
is clogged.
There is partial clogging in a flow
line at a point just before the 2 flow Identify and replace the clogged part.
lines merge.
The drain valve is open.
The pressure does not
rise.
The pressure rises too
much.
(Remove the column to
check.)
If pumping isopropyl alcohol does not work, either perform
ultrasonic cleaning or replace the corresponding check valve.
Close the drain valve.
Tighten the corresponding male nut.
Liquid is leaking from a flow-line
If tightening the male nut does not work, replace the male nut and
connection.
ferrule.
The line filter is clogged.
Perform ultrasonic cleaning for the line filter or replace it.
A flow line is clogged.
Identify and replace the clogged part.
The inner diameter of the tubing is
Use tubing with the specified inner diameter.
too small.
Liquid is leaking from the gap Replace the corresponding plunger seal.
The volume of the
automatic rinsing pump's between a pump head and a head
rinse solution increases. holder or from a rinse-solution If replacing the plunger seal does not work, replace the
outlet.
corresponding plunger.
The volume of the
Rinse solution is leaking from the
automatic rinsing pump's
Inspect and, if necessary, replace the corresponding diaphragm.
back of a head holder.
rinse solution decreases.
*1
*2
Refer to the Instruction Manual for the system controller.
Inspection Method for Clogging of the Suction Filter
Remove the filter and record the pressure waveform.
If the pressure waveform is improved by removing the filter, this indicates that clogging has
occurred in the suction filter.
LC-20AD/ AB Service Manual
7-2
Chapter 7: Troubleshooting and Corrective Action
7.2 Error Messages
This module has several self-diagnostic functions. Upon detection of an error, an alarm sounds and
error message appears on the display panel. The appropriate corrective action for each error
message is described in the following table.
NOTE
• Error messages are classified into the following types.
Fatal
The module stops operation. The error message cannot be cleared by pressing [CE].
Alarm
The module stops operation. The error message can be cleared by pressing [CE].
Warning
The module does not stop operation. The error message can be cleared by pressing [CE].
• A "D" or a "B" in the "Model" column of the following table indicates that the
corresponding error occurs only with either the LC-20AD or LC-20AB respectively. This
item is left blank if the error occurs for both models.
Probable Causes and Corrective Actions for Error Messages
Error message
ROM FAILURE
Model Type
D
MAIN ROM FAILURE
SUB ROM FAILURE
B
A-B TRANS ERROR
B
RAM FAILURE
OUT OF MAXSTEPS
Fatal
Fatal
Fatal
Fatal
Alarm
Probable cause/ Corrective action
Probable
cause
Corrective
action
Probable
cause
Corrective
action
Probable
cause
Corrective
action
Probable
cause
Corrective
action
Probable
cause
Corrective
action
Probable
cause
ERROR P-MAX
Alarm
Corrective
action
There is a ROM error.
Turn OFF the power and consult your Shimadzu representative.
There is a ROM error.
Turn OFF the power and consult your Shimadzu representative.
A communications error has occurred between pumps A and B.
Turn OFF the power and consult your Shimadzu representative.
There is a RAM error.
Turn OFF the power and consult your Shimadzu representative.
More than 320 steps of time program have been set.
More than 320 steps of time program cannot be created.
Delete unnecessary files and continue to input the program.
(Refer to "5.4 Creating Time Program" in the Instruction Manual for
details.)
The pump's discharge pressure has exceeded the value set as the
pressure upper limit, [P.MAX]. Pumping will automatically stop by
limiter, unless the [S-PROT] auxiliary function has been activated, in
which case pumping will continue at half the flow rate. (Refer to
"Setting System Protection" under "5.2.6 System Settings Group" in the
Instruction Manual for details.)
Check for clogging in the flow lines. If no clogging is found, set an
appropriate [P.MAX] value. (Refer to "4.1.3 Setting Maximum Pressure
Limit" in the LC-20AD's Instruction Manual or "Setting Maximum
Pressure Limit" under "5.2.3 Parameter Settings Group" in the
LC-20AB's Instruction Manual for details.)
LC-20AT Service Manual
7-3
Chapter 7: Troubleshooting and Corrective Action
Probable
cause
ERROR P-MIN
Alarm
ERROR HOME POS
D
Alarm
ERROR A-HOME POS
ERROR B-HOME POS
B
Alarm
OPEN DRAIN VALVE
Alarm
ERROR LEAK
Alarm
ERROR EXTERNAL
Alarm
WARN : M. PHASE
D
Warning
Corrective
action
Probable
cause
Corrective
action
Probable
cause
Corrective
action
Probable
cause
Corrective
action
Probable
cause
Corrective
action
Probable
cause
Corrective
action
Probable
cause
Corrective
action
Probable
cause
WARN : M. PHASE-A
WARN : M. PHASE-B
B
Warning
Corrective
action
Probable
cause
WARN : DEGAS PRS
ERROR OVER HEAT
Warning
Corrective
action
The pump's discharge pressure has dropped the value set as the pressure
lower limit, [P.MIN]. Pumping will automatically stop by limiter.
Check for leakage from the flow lines. If no leakage is found, set an
appropriate [P.MIN] value. Note that this function does not operate for
the first minute of pumping
(Refer to "4.1.4 Setting Minimum Pressure Limit" in the LC-20AD's
Instruction Manual or "Setting Minimum Pressure Limit" under "5.2.3
Parameter Settings Group" in the LC-20AB's Instruction Manual for
details.)
The motor's home position cannot be detected, the motor does not run,
or the motor is slipping.
Reset the power and press [pump]. If the message still appears, turn OFF
the power and contact your Shimadzu representative.
The home position of pump A's (or pump B's), motor cannot be detected,
the motor does not run, or the motor is slipping.
Reset the power and press [pump]. If the message still appears, turn OFF
the power and contact your Shimadzu representative.
The pump's discharge pressure has exceeded the value set for [P-PMAX]
during purging.
Open the drain valve and press [purge]. If the message still appears, set
appropriate values for the [P-FLOW] and [P-PMAX] auxiliary
functions.
(Refer to "Setting Purge Flow Rate" and "Setting Maximum Pressure
Limit during Purging" under "5.2.3 Parameter Settings Group" in the
Instruction Manual for details.)
The leak sensor detected a leak.
Check for liquid in the flow lines. Wipe away any liquid around the leak
sensor.
An error signal was input from the external device connected to an
external I/O terminal (ERR IN terminal).
Inspect the external device and remove the cause of the error.
The remaining volume of mobile phase is less than the alarm level.
Replace the mobile phase and reset the mobile-phase volume.
(Refer to "Showing/Setting Mobile Phase Volume" under "5.3.3 Mobile
Phase Monitor Group" in the LC-20AD's Instruction Manual for details.)
The remaining volume of pump A's (or pump B's) mobile phase is less
than the alarm level.
Replace pump A's (or pump B's) mobile phase and reset the
mobile-phase volume
(Refer to "Showing/Setting Mobile Phase Volume" under "5.3.3 Mobile
Phase Monitor Group" in the LC-20AB's Instruction Manual for details.)
The vacuum pressure of the degasser (DGU-20A) connected to the
module has been irregular for a certain amount of time.
Check the vacuum pressure of the degasser. If the vacuum pressure is
[NG], reset the power. If the vacuum pressure is [OK], the degasser is
performing automatic reset and so there is no problem.
(Refer to "Monitoring Vacuum Pressure in Degasser Unit" under "5.2.7
Monitor Settings Group" in the Instruction Manual for details.)
Probable
cause
The temperature inside the module is too high.
Corrective
action
If the heat outlet at the back of the module is blocked, change the
installation setup so that heat can escape. If there is insufficient cooling
due to a rotation fault in the internal fan (Part No. 228-25246-91), clean
or replace the fan. (Refer to "5.5 Cooling Fan (P/N 228-25246-91)" for
details.)
LC-20AD/ AB Service Manual
7-4
Chapter 8: Consumable Parts
Chapter 8: Consumable Parts
8.1 Consumable Parts
A set of these consumable parts and plumbing parts is available as a maintenance-kit assembly
(P/N 228-35465-91).
Part Name
P/N
Remarks
Seal
228-35146
Plunger seal
Peak filter PAT FRIT
228-32744
Line filter's frit
Filter ASSY
228-43342-91
Suction filter's filter body
Part Name
P/N
Remarks
Plunger-holder ASSY
228-35281-92
Plunger ASSY
228-35601-93
8.2 Other Replacement Parts
8.2.1 Mechanical Parts
Holder ASSY
228-35602-91
Check valve IN ASSY
228-45557-91
Check valve OUT ASSY
228-45563-95
Pump head
228-34541
Head holder
228-38022
Diaphragm (set of 2)
228-32784-91
Suction-filter ASSY
228-39181-95
Bushing
228-39084
Ferrule 3.0F-T
228-12493
For suction filter
FEP tubing 3 × 1.5
670-10321-05
For suction filter, 2,000 mm
Drain-tubing ASSY
228-25495-93
For suction filter
Rinse-tubing ASSY
228-39184-92
ETFE tubing1.6 × 0.8
228-18495-01
For use between the inlet block and the check valve
Male nut 1.6MN PEEK
228-35403
For use between the inlet block and the check valve
Inlet block
228-18648
228-45552-91
228-45552-95
228-45574-91
For pump inlet
For LC-20AB
For LC-20AD
Pressure-sensor ASSY
Drain-valve ASSY
Right-panel ASSY, B/D
228-43040-93
Thrust
228-34469
SUS tubing A
228-45590-91
For LC-20AD
SUS tubing B
228-45590-92
For LC-20AD
SUS plumbing B-A-L ASSY
228-45592-91
For pump A of LC-20AB (left head)
SUS plumbing B-A-R ASSY
228-45592-92
For pump A of LC-20AB (right head)
SUS plumbing B-B-L ASSY
228-45592-93
For pump B of LC-20AB (left head)
SUS plumbing B-B-R ASSY
228-45592-94
For pump B of LC-20AB (right head)
SUS plumbing B-P ASSY
228-45592-95
For LC-20AB's converging block
Panel 20AD
228-42208
For mounting the inlet block
LC-20AD/ AB Service Manual
8-1
Chapter 8: Consumable Parts
8.2.2 Electrical Parts
Part Name
Fuse, 5AT 250V
Switch ASSY
Power supply LEA75F-24
P/N
072-02004-23
228-42287-91
074-80426-61
Power supply LEA100F-24
074-80427-61
For LC-20AB
PCB LC-20AD
228-42114-93
For LC-20AD, without EEPROM
PCB LC-20AB
228-42118-92
For LC-20AB, without EEPROM
PCB photosensor LC2K ASSY
228-35842-92
Left panel 20AB ASSY
228-43200-93
For LC-20AB
Left panel 20AD ASSY
228-43200-91
For LC-20AD
Leak-sensor ASSY 700MM
228-39247-92
Fan for SPD60 LC-10A
228-25246-91
LC-20AD/ AB Service Manual
8-2
Remarks
For LC-20AD
Chapter 8: Consumable Parts
8.3 List of Parts Used
8.3.1 LC-20AD (P/N 228-45000-31)
Parts List
No.
0
1
2
3
4
5
6
7
8
9
10
11
12
20
21
30
31
100
P/N
228-45000
228-42310-91
228-42650-91
228-42443-01
071-60825-01
071-60813
228-39181-95
228-30884
228-39306
228-28253-91
228-30163-83
228-33627
228-30164
020-46564
037-38716-01
228-17413-03
201-30795
228-42505-93
Part Name
LC-20AD
Pump D-XP ASSY
Accessory kit
Nameplate, unit display
Cord, PHP-301+PHS-30*
Adapter, KPR-18
Suction-filter ASSY
Instruction manual, LC-20AD(JP)
RCA JACK CABLE 2
Remote cable
Certificate of complianceLC-20AD
Certificate of compliance, instructions for completion
Certificate of compliance, explanation
Screw, SUS sems P3 M5X16
Spacer, SPC 5X5
P bushing, blank
Cap, column
Certificate of packing, LC-20AD
8.3.2 Pump D-XP Assembly (P/N 228-42310-91)
Top view
LC-20AD/ AB Service Manual
8-3
Chapter 8: Consumable Parts
View A and Pump’s rear side
View B
Front view and detailed view E
View C
LC-20AD/ AB Service Manual
8-4
Chapter 8: Consumable Parts
Back view
View D
Side view
Parts List
No.
1
P/N
Part Name
228-42141
Chassis, pump T-XP
2
228-25436
Rubber feet
3
074-80426-61
Power supply, LEA75F-24
4
037-38858-33
Spacer, SP-40
5
228-42273
Blind panel
6
075-00145-03
Filter, FN9223-6/06
7
072-05669-02
Fuse holder, FH-B02
8
228-42287-91
Switch ASSY
9
228-42133
Switch holder
10
037-38760-04
Bushing, D4250-9130
11
228-42134-02
Switch rod
12
228-42754-91
Switch-rod holder ASSY
13
228-42147
Fan mounting plate D-XP
14
228-25246-91
Fan for SPD60 LC-10A
15
228-42683
Panel, fan holder
LC-20AD/ AB Service Manual
8-5
Chapter 8: Consumable Parts
20
228-42463
Mounting fixture、D-XP CD
21
228-42212
Right hinge, 20A
30
228-42114-91
PCB, LC-20AD
40
228-42286-91
Cable, AC inlet - fuse
41
228-42286-92
Cable, AC inlet - fuse
42
228-42286-93
Cable, AC inlet
43
228-42288-91
Cable, VHR6-VHR3
44
072-02004-23
Fuse, 218 005
45
018-17021-07
Shield foam, 71TS10-5
46
072-60314-01
Clamp, UL-13G
47
037-60186
Clamp E-20
48
018-23651
Tape, #973 19X0.13
50
228-45550-91
Pump 20AD ASSY
51
037-30128-17
Nut, C-440L-5
52
228-39613-02
Drain tubing
53
072-60320-01
Wiring band, T18R
60
228-42130-01
Cover, pump XP
70
228-45552-95
Pressure-sensor ASSY, D-XP
80
228-42213
Main frame, D
81
228-43040-93
Right-panel ASSY, B/D
82
228-42216
Option tray
83
037-38772-16
Spacer, MSB-320-03
85
228-42208
Panel, mixer
86
228-18739-92
Plumbing inlet VP ASSY
87
228-16000
Ferrule 1.6F
88
228-16001
Male nut 1.6MN
89
228-42415-11
D tubing L
90
228-42415-12
D tubing R
91
228-39247-92
Leak-sensor ASSY 700MM
92
037-51322-02
Catch, magnet CM-1205UB
93
037-51323-01
Latch, NS-2
95
228-43200-91
Panel ASSY (LC-20AD)
100
020-46535
Screw, SUS sems P3 M3X8
101
020-46547
Screw, SUS sems P3 M4X8
102
020-12105
Screw, SUS countersunk M3X8
103
020-46553
Screw, SUS sems P3 M4X25
104
022-27617
Bolt, SUS socket head P3 M4X8
105
020-46542
Screw, SUS sems P3 M3X30
106
020-46537
Screw, SUS sems P3 M3X12
108
023-04030
Nut, SUS #1 M3
109
023-04130
Nut, SUS #3 M3
110
026-66203
Retaining ring, for jig
111
020-37062
Screw, SUS truss M4X16
E3
112
020-46539
Screw, SUS sems P3 M3X16
113
020-37502
Screw, SUS binding headM3X8
114
020-46147
Screw, SUS sems P2 M4X8
115
023-66130
Washer, SUS floatM3
120
228-42442-01
Nameplate, power supply
121
228-42455
Label, pump, rear side
122
228-42603
Warning label
123
228-35126
Label, signal
124
228-42772
Label, parameter 20AD/B
LC-20AD/ AB Service Manual
8-6
Chapter 8: Consumable Parts
8.3.3 LC-20AB (P/N 228-45002-31)
Parts List
No.
P/N
Part Name
0
228-45002
LC-20AB
1
228-42300-91
LC-BXP ASSY
2
228-42650-93
Accessory kit 20AB
3
228-42443-07
Nameplate, unit display B100V
4
071-60825-01
Cord, PHP-301+PHS-30*
5
071-60813
Adapter, KPR-18
6
228-39181-95
Suction-filter ASSY
7
228-30882
Instruction manual, LC-20AB(JP)
8
228-39306
RCA JACK CABLE 2
9
228-28253-91
Remote cable
10
228-30163-84
Certificate of compliance LC-20AB
11
228-33627
Certificate of compliance, instructions for completion
12
228-30164
Certificate of compliance, explanations
20
020-46564
Screw, SUS sems P3 M5X16
21
037-38716-01
Spacer, SPC 5X5
30
228-17413-03
P bushing, blank
31
201-30795
Cap, column
40
038-03648-31
Bag, airsheet 120X130
100
228-42505-92
Certificate of packing, LC-20AB
8.3.4 LC-BXP ASSY (P/N 228-42300-91)
Top view
LC-20AD/ AB Service Manual
8-7
Chapter 8: Consumable Parts
View Aand Pump’s rear side
View B
Front view and detailed view E
View C
LC-20AD/ AB Service Manual
8-8
Chapter 8: Consumable Parts
Back view
View D
Side view
Parts List
No.
P/N
Part Name
1
228-42131
Chassis, pump B-XP
2
228-25436
Rubber feet
3
074-80427-61
Power supply, LEA100F-24
4
037-38858-33
Spacer, SP-40
5
228-42273
Blind panel
6
075-00145-03
Filter, FN9223-6/06
7
072-05669-02
Fuse holder, FH-B02
8
228-42287-91
Switch assembly
9
228-42133
Switch holder
10
037-38760-04
Bushing, D4250-9130
11
228-42134
Switch rod
12
228-42754-91
Switch-rod holder ASSY
13
228-42272
Fan mounting plate
14
228-25246-91
Fan for SPD60 LC-10A
15
228-42461
Insulation sheet
20
228-42464
Mounting fixture、B-XP CD
21
228-42212
Right hinge, 20A
LC-20AD/ AB Service Manual
8-9
Chapter 8: Consumable Parts
22
228-42255
Converging block B-XP
30
228-42118-91
PCB, LC-20AB
40
228-42286-91
Cable, AC inlet -FUSE
41
228-42286-92
Cable, AC inlet -FUSE
43
228-42286-93
Cable, AC inlet
44
228-42737-91
Cable, VHR8-VHR3
45
072-02004-23
Fuse, 218 005
46
018-17021-07
Shield foam, 71TS10-5
47
072-60314-01
Clamp, UL-13G
48
037-60186
Clamp E-20
49
018-23651
Tape, #973 19X0.13
50
228-45550-91
Pump 20AD ASSY
51
037-30128-17
Nut, C-440L-5
52
228-39613-02
Drain tubing
53
072-60320-01
Wiring band, T18R
60
228-42130-01
Cover, pump XP
70
228-45552-91
Pressure-sensor ASSY
80
228-42207
Main frame, B
81
228-43040-93
Right-panel ASSY, B/D
82
228-42208
Panel, mixer
83
228-18739-92
Plumbing inlet VP ASSY
84
228-16000
Ferrule 1.6F
85
228-16001
Male nut 1.6MN
91
228-39247-92
Leak-sensor ASSY 700MM
92
037-51322-02
Catch, magnet CM-1205UB
93
037-51323-01
Latch, NS-2
94
228-42418-11
B tubing 1
95
228-42419-11
B tubing 2
96
228-42420-11
B tubing 3
97
228-42421-11
B tubing 4
98
228-42422-11
B tubing 5
99
228-43200-93
Panel ASSY (LC-20AB)
100
020-46535
Screw, SUS sems P3 M3X8
101
020-46547
Screw, SUS sems P3 M4X8
102
020-46553
Screw, SUS sems P3 M4X25
103
020-12105
Screw, SUS countersunk M3X8
104
022-27617
Bolt, SUS socket head P3 M4X8
105
020-46542
Screw, SUS sems P3 M3X30
106
020-46537
Screw, SUS sems P3 M3X12
108
023-04030
Nut, SUS #1 M3
109
023-04130
Nut, SUS #3 M3
110
026-66203
Retaining ring, for jig E3
111
020-37062
Screw, SUS truss M4X16
112
020-37502
Screw, SUS binding head M3X8
113
020-46147
Screw, SUS sems P2 M4X8
114
023-66130
Washer, SUS float M3
120
228-42442-02
Nameplate, power supply
121
228-42455
Label, pump, rear side
122
228-42603
Warning label
123
228-35126
Label, signal
124
228-42772
Label, parameter 20AD/B
130
072-83101-04
Wire mark, 4
131
072-83101-18
Wire mark, 18
132
072-83101-03
Wire mark, 3
133
072-83101-19
Wire mark, 19
LC-20AD/ AB Service Manual
8-10
Chapter 8: Consumable Parts
134
072-83101-16
Wire mark, 16
135
072-83101-15
Wire mark, 15
8.3.5 Pump 20AD Assembly (P/N 228-45550-91)
Pump Assembly (1): Left Side
Pump Assembly (2): Top
Pump Assembly (3): Back
LC-20AD/ AB Service Manual
8-11
Chapter 8: Consumable Parts
Pump Assembly (4): Right Side
Parts List
No.
P/N
Part Name
0
228-42899
Pump D ASSY, adjusted
0
228-45550
Pump ASSY
1
228-34472-92
Crosshead ASSY
2
228-41841
Pump body
2
228-41841-01
Pump body
3
228-42384
Motor holder CD VER
4
228-18507
Spring bearing
5
228-18513-01
Cam
6
228-42109
Motor pump XP
7
228-41890
Disk, pump XP
8
228-24474
Oil receptacle
9
228-24470-01
Oil mat
10
228-42285-01
Return spring
11
026-63113
SNAPRING SUS 19
12
228-34541-01
Pump head 10AD
13
228-38022
Head holder
14
228-34469
Thrust
16
037-38860-60
Spacer, C407
18
228-35281-92
Plunger holder ASSY
19
228-31828
Diaphragm
20
228-35146
Seal 42455
21
228-45557-91
Check valve IN DX1.50
22
228-45563-95
Check valve OUT2 D1.5
23
228-35842-92
PCB photosensor LC2K ASSY
24
228-41891
Photosensor mounting plate
50
020-05134
Screw, SUS pan head M3X6
51
020-05137
Screw, SUS pan head M3X12
52
023-04030
Nut, SUS #1 M3
53
023-66130
Washer, SUS float M3
54
023-77030
Washer, SUS, spring 2 M3
55
022-27089
Bolt, SUS socket head M5X20
56
023-77050
Washer, SUS, spring 2 M5
57
022-27621
Bolt, SUS socket head P3 M4X16
58
022-27049
Bolt, SUS socket head M4X20
59
023-77040
Washer, SUS, spring 2 M4
60
021-04632
Retaining screw, S WP M4X4
61
020-46535
Screw, SUS sems P3 M3X8
62
020-46549
Screw, SUS sems P3 M4X12
63
020-46653
Screw, SUS sems P4 M4X16
LC-20AD/ AB Service Manual
8-12
Chapter 8: Consumable Parts
100
670-10484
Lubricating oil, Molikon 30
101
017-20045
Adhesive, 648
102
017-30835-02
Grease, #247 1KG
103
017-20054-23
Adhesive, 2701 250ML
LC-20AD/ AB Service Manual
8-13
Chapter 8: Consumable Parts
8.4 List of Parts Used in PCB
8.4.1 MAIN PUMP Board
PCB, LC-20AD (P/N 228-42114)
NOTE
• EEPROM is not included with Part No. 228-42114-93.
• EEPROM is included with Part No. 228-42114-91.
PCB Parts List
No.
P/N
Part Name
No.
P/N
Part Name
11
228-42117
BOARD, LC-20AD/T
NF 1
075-01039-05
Filter, NFM21CC471R1H3D
12
228-42145
MAIN CPU holder T/D
NF 2
075-01039-05
Filter, NFM21CC471R1H3D
13
037-38866-44
Spacer, CB-305
NF 3
075-01039-05
Filter, NFM21CC471R1H3D
14
060-49903-01
Silicon compound, SCH-30
NF 5
075-01039-05
Filter, NFM21CC471R1H3D
15
020-46537
Screw, SUS sems P3 M3X12
NF 6
075-01039-05
Filter, NFM21CC471R1H3D
16
023-04030
Nut, SUS #1 M3
NF 7
075-01039-05
Filter, NFM21CC471R1H3D
17
206-84763
Leaf spring
NF 8
075-01039-05
Filter, NFM21CC471R1H3D
100
228-42114-90
PCB, LC-20AD/T WO/ROM
NF 9
075-01039-08
Filter, NFM21CC223R1H3D
C1
055-87630-19
C, GRM1882C1H101JA01D
NF10
075-01039-08
Filter, NFM21CC223R1H3D
C2
055-87629-58
C, GRM1882C1H100JD01D
NF11
075-01039-08
Filter, NFM21CC223R1H3D
Filter, NFM21CC223R1H3D
C3
055-87629-58
C, GRM1882C1H100JD01D
NF12
075-01039-08
C4
055-84005-01
C, GRM219B11A105KC01D
NF13
075-01039-05
Filter, NFM21CC471R1H3D
C5
055-87650-08
C, chip1608 25V104ZTP
NF14
075-01039-05
Filter, NFM21CC471R1H3D
C6
055-87650-08
C, chip 1608 25V104ZTP
NF15
075-01039-05
Filter, NFM21CC471R1H3D
C7
055-87650-08
C, chip 1608 25V104ZTP
NF16
075-01039-05
Filter, NFM21CC471R1H3D
C8
055-87650-08
C, chip 1608 25V104ZTP
NF17
075-01039-08
Filter, NFM21CC223R1H3D
C9
055-87650-08
C, chip 1608 25V104ZTP
NF18
075-01039-08
Filter, NFM21CC223R1H3D
C 10
055-87650-08
C, chip 1608 25V104ZTP
NF19
075-01039-08
Filter, NFM21CC223R1H3D
C 11
055-87650-08
C, chip 1608 25V104ZTP
NF20
075-01039-08
Filter, NFM21CC223R1H3D
C 12
055-87650-08
C, chip 1608 25V104ZTP
NF21
075-01039-08
Filter, NFM21CC223R1H3D
C 13
055-87650-08
C, chip 1608 25V104ZTP
NF22
075-01039-08
Filter, NFM21CC223R1H3D
LC-20AD/ AB Service Manual
8-14
Chapter 8: Consumable Parts
C 14
055-87650-08
C, chip 1608 25V104ZTP
NF23
075-01039-08
Filter, NFM21CC223R1H3D
C 15
055-87650-08
C, chip 1608 25V104ZTP
NF24
075-01039-08
Filter, NFM21CC223R1H3D
C 16
055-87650-08
C, chip 1608 25V104ZTP
NF25
075-01039-08
Filter, NFM21CC223R1H3D
C 17
055-87650-08
C, chip 1608 25V104ZTP
NF26
075-01039-08
Filter, NFM21CC223R1H3D
C 18
055-87650-08
C, chip 1608 25V104ZTP
NF27
075-01039-08
Filter, NFM21CC223R1H3D
C 19
055-87650-08
C, chip 1608 25V104ZTP
NF28
075-01039-08
Filter, NFM21CC223R1H3D
C 20
055-87650-08
C, chip 1608 25V104ZTP
NF29
075-01039-08
Filter, NFM21CC223R1H3D
C 21
055-87650-08
C, chip 1608 25V104ZTP
NF30
075-01039-05
Filter, NFM21CC471R1H3D
C 22
055-87650-08
C, chip 1608 25V104ZTP
NF31
075-01039-05
Filter, NFM21CC471R1H3D
C 23
055-87650-08
C, chip 1608 25V104ZTP
NF32
075-01039-05
Filter, NFM21CC471R1H3D
C 24
055-87650-08
C, chip 1608 25V104ZTP
NF33
075-01039-05
Filter, NFM21CC471R1H3D
C 25
055-87650-08
C, chip 1608 25V104ZTP
NF34
075-01039-05
Filter, NFM21CC471R1H3D
C 26
055-87650-08
C, chip 1608 25V104ZTP
NF35
075-01039-05
Filter, NFM21CC471R1H3D
C 27
055-87650-08
C, chip 1608 25V104ZTP
NF36
075-01039-05
Filter, NFM21CC471R1H3D
C 28
055-87650-08
C, chip 1608 25V104ZTP
NF37
075-01039-05
Filter, NFM21CC471R1H3D
C 29
055-87650-08
C, chip 1608 25V104ZTP
NF38
075-01039-08
Filter, NFM21CC223R1H3D
C 30
055-87650-08
C, chip 1608 25V104ZTP
NF40
075-01039-08
Filter, NFM21CC223R1H3D
C 31
055-87650-08
C, chip 1608 25V104ZTP
NF42
075-01039-08
Filter, NFM21CC223R1H3D
C 32
055-87650-08
C, chip 1608 25V104ZTP
NF45
075-01039-05
Filter, NFM21CC471R1H3D
C 33
055-87650-08
C, chip 1608 25V104ZTP
NF46
075-01039-05
Filter, NFM21CC471R1H3D
C 34
055-87650-08
C, chip 1608 25V104ZTP
NF47
075-01039-05
Filter, NFM21CC471R1H3D
C 35
055-87650-08
C, chip 1608 25V104ZTP
NF48
075-01039-05
Filter, NFM21CC471R1H3D
C 36
055-87650-08
C, chip 1608 25V104ZTP
NF49
075-01039-08
Filter, NFM21CC223R1H3D
C 37
055-87650-08
C, chip 1608 25V104ZTP
NF50
075-01039-08
Filter, NFM21CC223R1H3D
C 38
055-87650-08
C, chip 1608 25V104ZTP
P1
071-06407-34
Terminal, LC-3-G, orange
C 39
055-84005-13
C, GRM21BB11E474KC01L
P2
071-06407-34
Terminal, LC-3-G, orange
C 40
055-84005-13
C, GRM21BB11E474KC01L
P3
071-06407-34
Terminal, LC-3-G, orange
C 41
055-84005-13
C, GRM21BB11E474KC01L
P4
071-06407-34
Terminal, LC-3-G, orange
C 42
055-84005-01
C, GRM219B11A105KC01D
Q1
060-39121-06
TR, RN2426
C 43
055-84005-01
C, GRM219B11A105KC01D
Q2
060-21244-02
TR, 2SA1244-YLB-TE12L
C 44
056-41941-62
C, UPW1V471MPH
Q3
060-39119-01
TR, RN1426
C 45
056-41941-62
C, UPW1V471MPH
Q4
060-39119-01
TR, RN1426
C 46
056-41941-62
C, UPW1V471MPH
Q5
060-39119-01
TR, RN1426
C 47
056-41941-62
C, UPW1V471MPH
Q6
060-39101-01
TR, RN1410
C 48
056-41638-35
C, UPS1C100MDH
R1
050-31006-73
R, chip 2A1/10W103F
C 49
055-87650-06
C, chip 1608 50V473ZTP
R2
050-31006-46
R, chip 2A1/10W751F
C 50
056-41941-62
C, UPW1V471MPH
R3
050-31006-97
R, chip 2A1/10W104F
C 51
055-87629-74
C, GRM1882C1H102JA01D
R4
050-31006-77
R, chip 2A1/10W153F
C 52
055-87629-74
C, GRM1882C1H102JA01D
R5
050-31006-32
R, chip 2A1/10W201F
C 53
055-87650-08
C, chip 1608 25V104ZTP
R6
050-31006-73
R, chip 2A1/10W103F
C 54
055-87650-08
C, chip 1608 25V104ZTP
R7
050-31006-73
R, chip 2A1/10W103F
C 55
055-87629-59
C, GRM1882C1H220JZ01D
R8
050-31006-69
R, chip 2A1/10W682F
C 56
055-87629-59
C, GRM1882C1H220JZ01D
R9
050-31006-73
R, chip 2A1/10W103F
C 58
055-87650-08
C, chip 1608 25V104ZTP
R 10
050-31006-73
R, chip 2A1/10W103F
C 59
055-87629-74
C, GRM1882C1H102JA01D
R 11
050-31006-73
R, chip 2A1/10W103F
C 60
055-87629-74
C, GRM1882C1H102JA01D
R 12
050-31006-73
R, chip 2A1/10W103F
C 61
055-87629-74
C, GRM1882C1H102JA01D
R 13
050-31006-73
R, chip 2A1/10W103F
D1
060-15837-02
DI, RK46
R 14
050-31006-73
R, chip 2A1/10W103F
D2
060-15928-01
DI, D1FL20U-4063
R 15
050-31006-73
R, chip 2A1/10W103F
D3
060-15928-01
DI, D1FL20U-4063
R 16
050-31006-97
R, chip 2A1/10W104F
D4
060-15928-01
DI, D1FL20U-4063
R 17
050-31006-97
R, chip 2A1/10W104F
D5
060-15928-01
DI, D1FL20U-4063
R 18
050-31006-01
R, chip 2A1/10W100F
D6
060-02101-01
DI, 1SS294 TE85R
R 19
050-31006-25
R, chip 2A1/10W101F
H1
078-20168-02
Buzzer, MEB-12C-5
R 20
050-31006-53
R, chip 2A1/10W152F
LC-20AD/ AB Service Manual
8-15
Chapter 8: Consumable Parts
J1
070-54132-13
Connector, IL-4P-S3EN2
R 21
050-31006-33
R, chip 2A1/10W221F
J2
070-08102-01
Connector, CMJ5006-0101
R 22
050-31006-56
R, chip 2A1/10W202F
J3
070-55319-01
Jack, LPR6520-0801
R 23
050-31006-56
R, chip 2A1/10W202F
J4
070-55319-01
Jack, LPR6520-0801
R 24
050-31006-89
R, chip 2A1/10W473F
J5
071-36121-10
Terminal strip, ML-800-S1H10P
R 25
050-31006-89
R, chip 2A1/10W473F
J6
070-92025-01
Transmitter, HFBR-1522
R 26
050-31006-65
R, chip 2A1/10W472F
J7
070-92025-11
Receiver, HFBR-2522
R 27
050-31006-25
R, chip 2A1/10W101F
J8
070-02832-11
Connector, JEY-9S-1A3G
R 28
050-31006-13
R, chip 2A1/10W330F
J8
070-02832-92
Lock screw, JFS-2.6S-C1WM
R 31
050-31006-56
R, chip 2A1/10W202F
J9
070-53262-02
Connector, XG4C-1031
R 32
050-31006-56
R, chip 2A1/10W202F
J 10
070-50695-10
Connector, 171825-2
R 33
050-31006-60
R, chip 2A1/10W302F
J 11
070-50695-13
Connector, 171826-5
R 34
050-31006-60
R, chip 2A1/10W302F
J 12
070-50679-40
Connector, B10B-PH-K-S
R 35
050-31006-41
R, chip 2A1/10W471F
J 13
070-50697-12
Connector, B3P-VH
R 36
050-31006-41
R, chip 2A1/10W471F
J 14
070-50631-02
Connector, HNC2-2.5P-2DS
R 37
050-31006-65
R, chip 2A1/10W472F
J 16
070-50679-33
Connector, B3B-PH-K-S
R 38
050-31006-65
R, chip 2A1/10W472F
J 19
070-50631-06
Connector, HNC2-2.5P-6DS
R 39
050-31384-13
R, chip SR733ATTER33J
K1
065-61591-03
Relay, HY1-4.5V
R 40
050-31384-13
R, chip SR733ATTER33J
K2
065-61591-03
Relay, HY1-4.5V
R 41
050-31384-13
R, chip SR733ATTER33J
L1
058-80018-17
Choke coil, CL02BE181
R 42
050-31384-13
R, chip SR733ATTER33J
M1
075-28790-04
IC, ADS1211U
R 43
050-31006-49
R, chip 2A1/10W102F
M2
075-31159-02
IC, µPC358G2-E1
R 44
050-31006-49
R, chip 2A1/10W102F
M3
075-28646-15
IC, OPA2337UA/2K5
R 53
050-31006-49
R, chip 2A1/10W102F
M4
075-33563-11
IC, TC74VHC14F-EL
R 54
050-31006-49
R, chip 2A1/10W102F
M5
075-33999-33
IC, TD62003AF-EL
R 55
050-31006-49
R, chip 2A1/10W102F
M6
075-31817-02
IC, µPC393G
R 56
050-31006-77
R, chip 2A1/10W153F
M7
070-73678-01
Socket, XR2A-0801-N
R 57
050-31006-77
R, chip 2A1/10W153F
M7
075-26488-21
IC, M95128-WBN6
R 58
050-31007-21
R, chip 2A1/10W105F
M8
075-39120-02
IC, SI-8050S
R 59
050-31007-21
R, chip 2A1/10W105F
M9
075-33148-15
IC, TA48033F (TE16L1, *
R 60
050-31007-21
R, chip 2A1/10W105F
M 10
075-33129-06
IC, TA78L12F
R 61
050-31007-21
R, chip 2A1/10W105F
M 11
075-33129-01
IC, TA78L05F
R 62
050-31007-21
R, chip 2A1/10W105F
M 12
228-42472
CPLD, LC-20AD/T KEYIF
R 63
050-31006-65
R, chip 2A1/10W472F
M 13
075-33563-05
IC, TC74VHCT04AF-EL
R 64
050-31006-65
R, chip 2A1/10W472F
M 14
075-33563-05
IC, TC74VHCT04AF-EL
RM 1
051-12001-73
R, CN1J4TD10KJ
M 15
075-30820-02
IC, M66240FP
RM 2
051-12001-73
R, CN1J4TD10KJ
M 16
060-49107-03
TR, MP4703
RM 3
051-12001-73
R, CN1J4TD10KJ
M 17
228-42471
CPLD, LC-20AD/T/B
RM 4
051-12001-37
R, CN1J4TD330J
M 18
075-29478-11
IC, AM188ER-25KC/W
RM 5
051-12001-37
R, CN1J4TD330J
M 19
070-73721-03
Socket, 940-99-032-24-*
RM 6
051-12001-49
R, CN1J4TD1.0KJ
M 19
228-42489-91
ROM, LC-20AD
RM 7
051-12001-89
R, CN1J4TD47KJ
M 19
228-42489-92
ROM, LC-20AT
RM 8
051-12001-21
R, CN1J4TD68J
M 20
075-30022-02
IC, M62733ML
RM 9
051-12001-49
R, CN1J4TD1.0KJ
Terminal, F4052A
M 21
075-39050-61
IC, PST600CMT
TM 1
071-06429-01
M 22
075-28646-15
IC, OPA2337UA/2K5
TM 2
071-06429-01
Terminal, F4052A
X1
061-86487-01
OSC, CX-8045G 10.000*
X1
061-86488-01
OSC, NX8045GB-10.0MH*
X2
061-86487-03
OSC, CX-8045G 24.000*
X2
061-86488-03
OSC, NX8045GB-24.0MH*
ZD 1
060-13203-38
DI, RD68FM-T1
ZD 2
060-13203-38
DI, RD68FM-T1
LC-20AD/ AB Service Manual
8-16
Chapter 8: Consumable Parts
<PCB, LC-20AB (P/N 228-42118) >
NOTE
• EEPROM is not included with Part No. 228-42118-92.
• EEPROM is included with Part No. 228-42118-91.
PCB Parts List
No.
0
0
0
0
11
12
13
14
15
16
17
18
19
100
C1
C2
C3
C4
C5
C6
C7
C8
C9
C 10
C 11
C 12
C 13
C 14
C 15
C 16
C 17
P/N
228-42118
228-42119
228-42120
228-42128
228-42121
228-42271
037-38866-44
060-49903-01
020-46537
023-04030
206-84763
070-02234
228-23498
228-42118-90
056-41941-62
056-41941-62
055-87629-74
055-87629-74
055-87629-74
055-87629-74
055-87650-08
055-87650-08
055-87650-08
055-87650-08
055-87650-08
055-87650-08
055-87650-08
055-87650-08
055-87650-08
055-87650-08
055-87650-08
Part Name
Assembly diagram, PCB LC-20AB
Circuit diagram, LC-20AB
Outline diagram, LC-20AB
Patterns, LC-20AB
BOARD, LC-20AB
MAIN CPU holder
Spacer,CB-305
Silicon compound, SCH-30
Screw, SUS sems P3 M3X12
Nut, SUS #1 M3
Leaf spring
Dust cap, 0255060000
Cap PVC D8X10
PCB, LC-20AB WO/ ROM
C, UPW1V471MPH
C, UPW1V471MPH
C, GRM1882C1H102JA01D
C, GRM1882C1H102JA01D
C, GRM1882C1H102JA01D
C, GRM1882C1H102JA01D
C, chip 1608 25V104ZTP
C, chip 1608 25V104ZTP
C, chip 1608 25V104ZTP
C, chip 1608 25V104ZTP
C, chip 1608 25V104ZTP
C, chip 1608 25V104ZTP
C, chip 1608 25V104ZTP
C, chip 1608 25V104ZTP
C, chip 1608 25V104ZTP
C, chip 1608 25V104ZTP
C, chip 1608 25V104ZTP
No.
NF 1
NF 2
NF 3
NF 4
NF 5
NF 6
NF 7
NF 8
NF 9
NF10
NF11
NF12
NF13
NF14
NF15
NF16
NF17
NF19
NF20
NF21
NF22
NF23
NF24
NF25
NF26
NF28
NF30
NF33
NF34
NF35
NF36
P/N
075-01039-05
075-01039-08
075-01039-08
075-01039-08
075-01039-08
075-01039-05
075-01039-05
075-01039-05
075-01039-05
075-01039-08
075-01039-08
075-01039-08
075-01039-08
075-01039-08
075-01039-05
075-01039-08
075-01039-05
075-01039-05
075-01039-05
075-01039-05
075-01039-05
075-01039-05
075-01039-05
075-01039-05
075-01039-05
075-01039-08
075-01039-05
075-01039-08
075-01039-05
075-01039-05
075-01039-05
Part Name
Filter, NFM21CC471R1H3D
Filter, NFM21CC223R1H3D
Filter, NFM21CC223R1H3D
Filter, NFM21CC223R1H3D
Filter, NFM21CC223R1H3D
Filter, NFM21CC471R1H3D
Filter, NFM21CC471R1H3D
Filter, NFM21CC471R1H3D
Filter, NFM21CC471R1H3D
Filter, NFM21CC223R1H3D
Filter, NFM21CC223R1H3D
Filter, NFM21CC223R1H3D
Filter, NFM21CC223R1H3D
Filter, NFM21CC223R1H3D
Filter, NFM21CC471R1H3D
Filter, NFM21CC223R1H3D
Filter, NFM21CC471R1H3D
Filter, NFM21CC471R1H3D
Filter, NFM21CC471R1H3D
Filter, NFM21CC471R1H3D
Filter, NFM21CC471R1H3D
Filter, NFM21CC471R1H3D
Filter, NFM21CC471R1H3D
Filter, NFM21CC471R1H3D
Filter, NFM21CC471R1H3D
Filter, NFM21CC223R1H3D
Filter, NFM21CC471R1H3D
Filter, NFM21CC223R1H3D
Filter, NFM21CC471R1H3D
Filter, NFM21CC471R1H3D
Filter, NFM21CC471R1H3D
LC-20AD/ AB Service Manual
8-17
Chapter 8: Consumable Parts
C 18
C 19
C 20
C 21
C 22
C 23
C 24
C 25
C 26
C 27
C 28
C 29
C 30
C 31
C 32
C 33
C 34
C 35
C 36
C 37
C 38
C 39
C 40
C 41
C 42
C 43
C 44
C 45
C 46
C 47
C 48
C 49
C 50
C 51
C 52
C 53
C 54
C 55
C 56
C 57
C 58
C 59
C 60
C 61
C 62
C 63
C 64
C 65
C 66
C 67
C 68
C 69
C 70
C 71
C 73
C 74
C 75
C 76
D1
055-87650-08
055-87650-08
055-87650-08
055-87650-08
055-87650-08
055-87650-08
055-87650-08
055-87650-08
055-87650-08
055-87650-08
055-87650-08
055-87650-08
055-87650-08
055-87650-08
055-87650-08
055-87650-08
055-87650-08
055-87650-08
055-87650-08
055-87650-08
055-87650-08
055-87650-08
055-87650-08
055-87650-08
055-87650-08
055-87650-08
055-87650-08
055-87650-08
055-87650-08
055-87650-08
055-87650-08
055-87650-08
055-87650-08
055-87650-08
055-87650-08
055-87650-08
055-87650-08
055-87630-19
055-87629-58
055-87629-58
055-84005-01
055-84005-13
055-84005-01
055-84005-01
055-84005-13
055-84005-13
055-87629-59
055-87629-59
056-41941-62
056-41941-62
056-41941-62
056-41638-35
055-87650-06
056-41941-62
055-87629-74
055-87629-74
055-87629-74
055-87650-08
060-15837-02
C, chip 1608 25V104ZTP
C, chip 1608 25V104ZTP
C, chip 1608 25V104ZTP
C, chip 1608 25V104ZTP
C, chip 1608 25V104ZTP
C, chip 1608 25V104ZTP
C, chip 1608 25V104ZTP
C, chip 1608 25V104ZTP
C, chip 1608 25V104ZTP
C, chip 1608 25V104ZTP
C, chip 1608 25V104ZTP
C, chip 1608 25V104ZTP
C, chip 1608 25V104ZTP
C, chip 1608 25V104ZTP
C, chip 1608 25V104ZTP
C, chip 1608 25V104ZTP
C, chip 1608 25V104ZTP
C, chip 1608 25V104ZTP
C, chip 1608 25V104ZTP
C, chip 1608 25V104ZTP
C, chip 1608 25V104ZTP
C, chip 1608 25V104ZTP
C, chip 1608 25V104ZTP
C, chip 1608 25V104ZTP
C, chip 1608 25V104ZTP
C, chip 1608 25V104ZTP
C, chip 1608 25V104ZTP
C, chip 1608 25V104ZTP
C, chip 1608 25V104ZTP
C, chip 1608 25V104ZTP
C, chip 1608 25V104ZTP
C, chip 1608 25V104ZTP
C, chip 1608 25V104ZTP
C, chip 1608 25V104ZTP
C, chip 1608 25V104ZTP
C, chip 1608 25V104ZTP
C, chip 1608 25V104ZTP
C, GRM1882C1H101JA01D
C, GRM1882C1H100JD01D
C, GRM1882C1H100JD01D
C, GRM219B11A105KC01D
C, GRM21BB11E474KC01L
C, GRM219B11A105KC01D
C, GRM219B11A105KC01D
C, GRM21BB11E474KC01L
C, GRM21BB11E474KC01L
C, GRM1882C1H220JZ01D
C, GRM1882C1H220JZ01D
C, UPW1V471MPH
C, UPW1V471MPH
C, UPW1V471MPH
C, UPS1C100MDH
C, chip 1608 50V473ZTP
C, UPW1V471MPH
C, GRM1882C1H102JA01D
C, GRM1882C1H102JA01D
C, GRM1882C1H102JA01D
C, chip 1608 25V104ZTP
DI, RK46
NF37
NF38
NF39
NF40
P2
P3
P4
P5
Q1
Q2
Q3
R1
R2
R9
R 10
R 11
R 12
R 13
R 14
R 15
R 16
R 17
R 18
R 19
R 20
R 21
R 22
R 23
R 24
R 25
R 25
R 26
R 26
R 27
R 27
R 28
R 28
R 29
R 29
R 30
R 30
R 31
R 31
R 32
R 32
R 33
R 34
R 35
R 36
R 37
R 38
R 39
R 40
R 41
R 42
R 43
R 44
R 45
M 25
LC-20AD/ AB Service Manual
8-18
075-01039-05
075-01039-05
075-01039-05
075-01039-08
071-06407-34
071-06407-34
071-06407-34
071-06407-34
060-37600-11
060-39119-56
060-39101-01
050-31006-25
050-31006-13
050-31006-56
050-31006-56
050-31006-56
050-31006-56
050-31006-60
050-31006-60
050-31006-60
050-31006-60
050-31006-41
050-31006-41
050-31006-41
050-31006-41
050-31006-65
050-31006-65
050-31006-65
050-31006-65
050-31384-13
050-31514-01
050-31384-13
050-31514-01
050-31384-13
050-31514-01
050-31384-13
050-31514-01
050-31384-13
050-31514-01
050-31384-13
050-31514-01
050-31384-13
050-31514-01
050-31384-13
050-31514-01
050-31006-73
050-31006-46
050-31006-97
050-31006-77
050-31006-73
050-31006-73
050-31006-49
050-31006-73
050-31006-73
050-31006-73
050-31006-73
050-31006-73
050-31006-73
075-33129-06
Filter, NFM21CC471R1H3D
Filter, NFM21CC471R1H3D
Filter, NFM21CC471R1H3D
Filter, NFM21CC223R1H3D
Terminal, LC-3-G, orange
Terminal, LC-3-G, orange
Terminal, LC-3-G, orange
Terminal, LC-3-G, orange
TR, 2SJ600-Z
TR, RN1426TE85L
TR, RN1410
R, chip 2A1/ 10W101F
R, chip 2A1/ 10W330F
R, chip 2A1/ 10W202F
R, chip 2A1/ 10W202F
R, chip 2A1/ 10W202F
R, chip 2A1/ 10W202F
R, chip 2A1/ 10W302F
R, chip 2A1/ 10W302F
R, chip 2A1/ 10W302F
R, chip 2A1/ 10W302F
R, chip 2A1/ 10W471F
R, chip 2A1/ 10W471F
R, chip 2A1/ 10W471F
R, chip 2A1/ 10W471F
R, chip 2A1/ 10W472F
R, chip 2A1/ 10W472F
R, chip 2A1/ 10W472F
R, chip 2A1/ 10W472F
R, chip SR733ATTER33J
R, chip MCR100JZHJLR33
R, chip SR733ATTER33J
R, chip MCR100JZHJLR33
R, chip SR733ATTER33J
R, chip MCR100JZHJLR33
R, chip SR733ATTER33J
R, chip MCR100JZHJLR33
R, chip SR733ATTER33J
R, chip MCR100JZHJLR33
R, chip SR733ATTER33J
R, chip MCR100JZHJLR33
R, chip SR733ATTER33J
R, chip MCR100JZHJLR33
R, chip SR733ATTER33J
R, chip MCR100JZHJLR33
R, chip 2A1/ 10W103F
R, chip 2A1/ 10W751F
R, chip 2A1/ 10W104F
R, chip 2A1/ 10W153F
R, chip 2A1/ 10W103F
R, chip 2A1/ 10W103F
R, chip 2A1/ 10W102F
R, chip 2A1/ 10W103F
R, chip 2A1/ 10W103F
R, chip 2A1/ 10W103F
R, chip 2A1/ 10W103F
R, chip 2A1/ 10W103F
R, chip 2A1/ 10W103F
IC, TA78L12F
Chapter 8: Consumable Parts
D2
D3
D4
D5
D6
D7
D8
D9
D 10
H1
J3
J4
J5
J6
J7
J8
J8
J9
J 10
J 11
J 12
J 13
J 14
J 15
J 16
J 18
J 19
J 20
K1
K2
L1
M1
M2
M3
M4
M5
M6
M7
M8
M9
M 10
M 11
M 12
M 13
M 14
M 15
M 16
M 17
M 18
M 18
M 19
M 19
M 20
M 21
M 22
M 22
M 23
M 24
060-15928-01
060-15928-01
060-15928-01
060-15928-01
060-15928-01
060-15928-01
060-15928-01
060-15928-01
060-02101-01
078-20168-02
070-50631-06
070-50631-06
071-36121-10
070-92025-01
070-92025-11
070-02832-11
070-02832-92
070-50695-13
070-54132-13
070-08102-01
070-55319-01
070-55319-01
070-50697-12
070-50631-02
070-50631-02
070-50679-33
070-50679-33
070-50679-40
065-61591-03
065-61591-03
058-80018-17
075-30820-02
075-30820-02
060-49107-03
060-49107-03
075-31818-04
228-42473
075-33563-05
075-33563-05
075-33563-05
228-42471
075-28790-04
075-31159-02
075-28646-15
075-29478-11
075-29478-11
075-33563-11
075-33999-33
070-73721-03
228-42489-93
070-73721-03
228-42489-93
075-30022-02
075-39050-61
070-73678-01
075-26488-21
075-39120-02
075-33148-15
DI, D1FL20U-4063
DI, D1FL20U-4063
DI, D1FL20U-4063
DI, D1FL20U-4063
DI, D1FL20U-4063
DI, D1FL20U-4063
DI, D1FL20U-4063
DI, D1FL20U-4063
DI, 1SS294 TE85R
Buzzer, MEB-12C-5
Connector, HNC2-2.5P-6DS
Connector, HNC2-2.5P-6DS
Terminal strip, ML-800-S1H10P
Transmitter, HFBR-1522
Receiver, HFBR-2522
Connector, JEY-9S-1A3G
Lock screw, JFS-2.6S-C1WM
Connector, 171826-5
Connector, IL-4P-S3EN2
Connector, CMJ5006-0101
Jack, LPR6520-0801
Jack, LPR6520-0801
Connector, B3P-VH
Connector, HNC2-2.5P-2DS
Connector, HNC2-2.5P-2DS
Connector, B3B-PH-K-S
Connector, B3B-PH-K-S
Connector, B10B-PH-K-S
Relay, HY1-4.5V
Relay, HY1-4.5V
Choke coil, CL02BE181
IC, M66240FP
IC, M66240FP
TR, MP4703
TR, MP4703
IC, µPC339G
CPLD, LC-20AB SUB
IC, TC74VHCT04AF-EL
IC, TC74VHCT04AF-EL
IC, TC74VHCT04AF-EL
CPLD, LC-20AD/ T/ B
IC, ADS1211U
IC, µPC358G2-E1
IC, OPA2337UA/2K5
IC, AM188ER-25KC/W
IC, AM188ER-25KC/W
IC, TC74VHC14F-EL
IC, TD62003AF-EL
Socket, 940-99-032-24-*
ROM, LC-20AB
Socket, 940-99-032-24-*
ROM, LC-20AB
IC, M62733ML
IC, PST600CMT
Socket, XR2A-0801-N
IC, M95128-WBN6
IC, SI-8050S
IC, TA48033F (TE16L1, *
M 26
M 27
R 46
R 47
R 48
R 49
R 50
R 66
R 68
R 69
R 70
R 71
R 72
R 73
R 74
R 75
R 76
R 77
R 78
R 79
R 80
R 81
R 82
R 83
R 84
R 85
R 86
R 87
R 88
R 89
R 90
R 91
R 92
R 93
R 94
RM 1
RM 2
RM 3
RM 4
RM 5
RM 6
RM 7
RM 8
RM 9
RM10
RM11
TM 1
TM 2
X1
X1
X2
X2
ZD 1
ZD 2
ZD 3
ZD 4
075-33129-01
075-28646-15
050-31006-73
050-31006-73
050-31006-73
050-31006-97
050-31006-01
050-31006-33
050-31006-49
050-31006-49
050-31006-56
050-31006-69
050-31006-89
050-31006-89
050-31006-65
050-31006-65
050-31006-65
050-31006-65
050-31006-77
050-31006-77
050-31006-49
050-31006-49
050-31006-49
050-31006-73
050-31006-97
050-31006-25
050-31006-73
050-31006-53
050-31006-32
050-31007-21
050-31007-21
050-31007-21
050-31007-21
050-31007-21
050-31006-73
051-12001-89
051-12001-73
051-12001-73
051-12001-73
051-12001-73
051-12001-73
051-12001-37
051-12001-49
051-12001-49
051-12001-21
051-12001-21
071-06429-01
071-06429-01
061-86487-01
061-86488-01
061-86487-03
061-86488-03
060-13203-38
060-13203-38
060-13203-38
060-13203-38
IC, TA78L05F
IC, OPA2337UA/ 2K5
R, chip 2A1/ 10W103F
R, chip 2A1/ 10W103F
R, chip 2A1/ 10W103F
R, chip 2A1/ 10W104F
R, chip 2A1/ 10W100F
R, chip 2A1/ 10W221F
R, chip 2A1/ 10W102F
R, chip 2A1/ 10W102F
R, chip 2A1/ 10W202F
R, chip 2A1/ 10W682F
R, chip 2A1/ 10W473F
R, chip 2A1/ 10W473F
R, chip 2A1/ 10W472F
R, chip 2A1/ 10W472F
R, chip 2A1/ 10W472F
R, chip 2A1/ 10W472F
R, chip 2A1/ 10W153F
R, chip 2A1/ 10W153F
R, chip 2A1/ 10W102F
R, chip 2A1/ 10W102F
R, chip 2A1/ 10W102F
R, chip 2A1/ 10W103F
R, chip 2A1/ 10W104F
R, chip 2A1/ 10W101F
R, chip 2A1/ 10W103F
R, chip 2A1/ 10W152F
R, chip 2A1/ 10W201F
R, chip 2A1/ 10W105F
R, chip 2A1/ 10W105F
R, chip 2A1/ 10W105F
R, chip 2A1/ 10W105F
R, chip 2A1/ 10W105F
R, chip 2A1/ 10W103F
R, CN1J4TD47KJ
R, CN1J4TD10KJ
R, CN1J4TD10KJ
R, CN1J4TD10KJ
R, CN1J4TD10KJ
R, CN1J4TD10KJ
R, CN1J4TD330J
R, CN1J4TD1.0KJ
R, CN1J4TD1.0KJ
R, CN1J4TD68J
R, CN1J4TD68J
Terminal, F4052A
Terminal, F4052A
OSC, CX-8045G 10.000*
OSC, NX8045GB-10.0MH*
OSC, CX-8045G 24.000*
OSC, NX8045GB-24.0MH*
DI, RD68FM-T1
DI, RD68FM-T1
DI, RD68FM-T1
DI, RD68FM-T1
LC-20AD/ AB Service Manual
8-19
Chapter 8: Consumable Parts
8.5 Optional Parts
8.5.1 For LC-20AD/ AB
Degasser Unit (5 Flow Lines): DGU-20A5 (P/N 228-45019-91)
This unit degasses by passing the mobile-phase solvent through special tubing made of resin
film and reducing the pressure around the film. It can separately degas up to 5 flow lines and
connects to the pump unit.
Degasser Unit (3 Flow Lines): DGU-20A3 (P/N 228-45018-91)
This unit degasses by passing the mobile-phase solvent through special tubing made of resin
film and reducing the pressure around the film. It can separately degas up to 3 flow lines and
connects to the pump unit.
Degasser Unit: DGU-10B (P/N 228-32235-91)
This unit degasses up to four different mobile phases using helium. It can be switched ON/OFF
from the module or the system controller.
Reservoir Switching Valve: FCV-11AL (P/N 228-45048-xx)
This is a solenoid valve unit for switching between reservoir bottles (up to three flow lines).
It can automatically switch between two liquids serving one module (e.g., between the mobile
phase and rinse solution). One unit can perform automatic switching for up to three modules.
Reservoir Switching Valve: FCV-11ALS (P/N 228-45049-xx)
This is a solenoid valve unit that can automatically switch between two liquids serving one
module (e.g., between the mobile phase and rinse solution).
One unit can perform automatic switching for one module.
Reservoir Switching Valve: FCV-13AL (P/N 228-35324-92)
This valve automatically switches between mobile phases and incorporates 7 ports and 6
positions.
It can switch between up to 6 reservoir bottles and can be switched ON/OFF with the system
controller via option box vp.
Option Box vp (P/N 228-45060-xx)
This box can house up to two FCV-11AL, FCV-11ALS, or DGU-10B units. It can be installed
under the module to save space.
Reservoir Box (P/N 228-45041-91)
Holds up to seven 1-liter reservoir bottles.
SUS Mixer (P/N 228-35326-92)
This is a gradient mixer that offers excellent mixing performance. The capacity can be varied in
three stages.
It can be used for high-pressure, low-pressure, or semi-micro gradient analysis.
Semi Micro Mixer (P/N 228-35830-92)
This is a semi-micro gradient mixer with excellent mixing performance.
It can be installed inside the module using the semi micro mixer installation kit (T) (Part No.
228-45936-91 for both LC-20AD and LC-20AB).
Injector Mounting Plate (P/N 228-35659-91)
Used for mounting a manual injector onto the module.
Column Holder (P/N 228-35655-93)
Used if the column is mounted on the module.
LC-20AD/ AB Service Manual
8-20
Chapter 8: Consumable Parts
CBM-20Alite (P/N 228-45011-31)
The CBM-20Alite system controller can be installed inside the module. (Refer to "5.7.3
CBM-20Alite (P/N 228-45011-31)" for details.)
8.5.2 LC-20AD
Low-pressure Gradient Unit: (P/N 228-45040-91)
This unit can switch between up to four low-pressure gradients and mobile phases.
It is useful for auto rinsing of column and flow lines and is installed inside the module.
Automatic Rinsing Pump 20AD (P/N 228-45567-91)
This pump performs automatic rinsing of the back of plunger seals using a rinse solution.
It is particularly effective when using a buffer solution with a high salt concentration.
8.5.3 LC-20AB
Low-pressure Gradient Unit: FCV-10AVvp (P/N 228-34700-xx)
This unit can switch between up to four mobile phases (low-pressure gradient not possible). It is
useful for auto rinsing of column and flow lines.
Automatic Rinsing Pump (P/N 228-45567-91)
This pump performs continuous, automatic rinsing of the back of plunger seals using a rinse
solution.
It is particularly effective when using a buffer solution with a high salt concentration.
LC-20AD/ AB Service Manual
8-21
Chapter 8: Consumable Parts
- blank page -
LC-20AD/ AB Service Manual
8-22
Chapter 9: Circuit Diagrams
Chapter 9: Circuit Diagrams
9.1 Circuit Diagrams
LC-20AD and LC-20AB
(1) PCB, panel ASSY
LC-20AD
(1) Block diagram
(2) PCB, LC-20AD
228-42115 (1/ 5)
228-42115 (2/ 5)
228-42115 (3/ 5)
228-42115 (4/ 5)
228-42115 (5/ 5)
LC-20AB
(1) Block diagram
(2) PCB, LC-20AB
228-42119 (1/ 7)
228-42119 (2/ 7)
228-42119 (3/ 7)
228-42119 (4/ 7)
228-42119 (5/ 7)
228-42119 (6/ 7)
228-42119 (7/ 7)
LC-20AD/ AB Service Manual
9-1
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