LG | LD84A | User's Manual | LG LD84A User's Manual

Internal Use Only
website:http://biz.LGservice.com
LCD TV
SERVICE MANUAL
CHASSIS : LD84A
MODEL : 32LG3000
32LG3000-ZA
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CONTENTS
CONTENTS .............................................................................................. 2
PRODUCT SAFETY ..................................................................................3
SPECIFICATION ........................................................................................6
ADJUSTMENT INSTRUCTION ...............................................................10
TROUBLE SHOOTING ............................................................................14
BLOCK DIAGRAM...................................................................................20
EXPLODED VIEW .................................................................................. 22
SVC. SHEET ...............................................................................................
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
-2-
LGE Internal Use Only
SAFETY PRECAUTIONS
IMPORTANT SAFETY NOTICE
Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by
in the
Schematic Diagram and Replacement Parts List.
It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent
Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
Leakage Current Hot Check (See below Figure)
Plug the AC cord directly into the AC outlet.
General Guidance
An isolation Transformer should always be used during the
servicing of a receiver whose chassis is not isolated from the AC
power line. Use a transformer of adequate power rating as this
protects the technician from accidents resulting in personal injury
from electrical shocks.
It will also protect the receiver and it's components from being
damaged by accidental shorts of the circuitry that may be
inadvertently introduced during the service operation.
If any fuse (or Fusible Resistor) in this TV receiver is blown,
replace it with the specified.
When replacing a high wattage resistor (Oxide Metal Film Resistor,
over 1W), keep the resistor 10mm away from PCB.
Do not use a line Isolation Transformer during this check.
Connect 1.5K/10watt resistor in parallel with a 0.15uF capacitor
between a known good earth ground (Water Pipe, Conduit, etc.)
and the exposed metallic parts.
Measure the AC voltage across the resistor using AC voltmeter
with 1000 ohms/volt or more sensitivity.
Reverse plug the AC cord into the AC outlet and repeat AC voltage
measurements for each exposed metallic part. Any voltage
measured must not exceed 0.75 volt RMS which is corresponds to
0.5mA.
In case any measurement is out of the limits specified, there is
possibility of shock hazard and the set must be checked and
repaired before it is returned to the customer.
Leakage Current Hot Check circuit
Keep wires away from high voltage or high temperature parts.
AC Volt-meter
Before returning the receiver to the customer,
always perform an AC leakage current check on the exposed
metallic parts of the cabinet, such as antennas, terminals, etc., to
be sure the set is safe to operate without damage of electrical
shock.
Leakage Current Cold Check(Antenna Cold Check)
With the instrument AC plug removed from AC source, connect an
electrical jumper across the two AC plug prongs. Place the AC
switch in the on position, connect one lead of ohm-meter to the AC
plug prongs tied together and touch other ohm-meter lead in turn to
each exposed metallic parts such as antenna terminals, phone
jacks, etc.
If the exposed metallic part has a return path to the chassis, the
measured resistance should be between 1MΩ and 5.2MΩ.
When the exposed metal has no return path to the chassis the
reading must be infinite.
An other abnormality exists that must be corrected before the
receiver is returned to the customer.
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
-3-
To Instrument's
exposed
METALLIC PARTS
0.15uF
Good Earth Ground
such as WATER PIPE,
CONDUIT etc.
1.5 Kohm/10W
LGE Internal Use Only
SERVICING PRECAUTIONS
CAUTION: Before servicing receivers covered by this service
manual and its supplements and addenda, read and follow the
SAFETY PRECAUTIONS on page 3 of this publication.
NOTE: If unforeseen circumstances create conflict between the
following servicing precautions and any of the safety precautions on
page 3 of this publication, always follow the safety precautions.
Remember: Safety First.
General Servicing Precautions
1. Always unplug the receiver AC power cord from the AC power
source before;
a. Removing or reinstalling any component, circuit board
module or any other receiver assembly.
b. Disconnecting or reconnecting any receiver electrical plug or
other electrical connection.
c. Connecting a test substitute in parallel with an electrolytic
capacitor in the receiver.
CAUTION: A wrong part substitution or incorrect polarity
installation of electrolytic capacitors may result in an
explosion hazard.
2. Test high voltage only by measuring it with an appropriate high
voltage meter or other voltage measuring device (DVM,
FETVOM, etc) equipped with a suitable high voltage probe.
Do not test high voltage by "drawing an arc".
3. Do not spray chemicals on or near this receiver or any of its
assemblies.
4. Unless specified otherwise in this service manual, clean
electrical contacts only by applying the following mixture to the
contacts with a pipe cleaner, cotton-tipped stick or comparable
non-abrasive applicator; 10% (by volume) Acetone and 90% (by
volume) isopropyl alcohol (90%-99% strength)
CAUTION: This is a flammable mixture.
Unless specified otherwise in this service manual, lubrication of
contacts in not required.
5. Do not defeat any plug/socket B+ voltage interlocks with which
receivers covered by this service manual might be equipped.
6. Do not apply AC power to this instrument and/or any of its
electrical assemblies unless all solid-state device heat sinks are
correctly installed.
7. Always connect the test receiver ground lead to the receiver
chassis ground before connecting the test receiver positive
lead.
Always remove the test receiver ground lead last.
8. Use with this receiver only the test fixtures specified in this
service manual.
CAUTION: Do not connect the test fixture ground strap to any
heat sink in this receiver.
Electrostatically Sensitive (ES) Devices
Some semiconductor (solid-state) devices can be damaged easily
by static electricity. Such components commonly are called
Electrostatically Sensitive (ES) Devices. Examples of typical ES
devices are integrated circuits and some field-effect transistors and
semiconductor "chip" components. The following techniques
should be used to help reduce the incidence of component
damage caused by static by static electricity.
1. Immediately before handling any semiconductor component or
semiconductor-equipped assembly, drain off any electrostatic
charge on your body by touching a known earth ground.
Alternatively, obtain and wear a commercially available
discharging wrist strap device, which should be removed to
prevent potential shock reasons prior to applying power to the
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
unit under test.
2. After removing an electrical assembly equipped with ES
devices, place the assembly on a conductive surface such as
aluminum foil, to prevent electrostatic charge buildup or
exposure of the assembly.
3. Use only a grounded-tip soldering iron to solder or unsolder ES
devices.
4. Use only an anti-static type solder removal device. Some solder
removal devices not classified as "anti-static" can generate
electrical charges sufficient to damage ES devices.
5. Do not use freon-propelled chemicals. These can generate
electrical charges sufficient to damage ES devices.
6. Do not remove a replacement ES device from its protective
package until immediately before you are ready to install it.
(Most replacement ES devices are packaged with leads
electrically shorted together by conductive foam, aluminum foil
or comparable conductive material).
7. Immediately before removing the protective material from the
leads of a replacement ES device, touch the protective material
to the chassis or circuit assembly into which the device will be
installed.
CAUTION: Be sure no power is applied to the chassis or circuit,
and observe all other safety precautions.
8. Minimize bodily motions when handling unpackaged
replacement ES devices. (Otherwise harmless motion such as
the brushing together of your clothes fabric or the lifting of your
foot from a carpeted floor can generate static electricity
sufficient to damage an ES device.)
General Soldering Guidelines
1. Use a grounded-tip, low-wattage soldering iron and appropriate
tip size and shape that will maintain tip temperature within the
range or 500°F to 600°F.
2. Use an appropriate gauge of RMA resin-core solder composed
of 60 parts tin/40 parts lead.
3. Keep the soldering iron tip clean and well tinned.
4. Thoroughly clean the surfaces to be soldered. Use a mall wirebristle (0.5 inch, or 1.25cm) brush with a metal handle.
Do not use freon-propelled spray-on cleaners.
5. Use the following unsoldering technique
a. Allow the soldering iron tip to reach normal temperature.
(500°F to 600°F)
b. Heat the component lead until the solder melts.
c. Quickly draw the melted solder with an anti-static, suctiontype solder removal device or with solder braid.
CAUTION: Work quickly to avoid overheating the circuit
board printed foil.
6. Use the following soldering technique.
a. Allow the soldering iron tip to reach a normal temperature
(500°F to 600°F)
b. First, hold the soldering iron tip and solder the strand against
the component lead until the solder melts.
c. Quickly move the soldering iron tip to the junction of the
component lead and the printed circuit foil, and hold it there
only until the solder flows onto and around both the
component lead and the foil.
CAUTION: Work quickly to avoid overheating the circuit
board printed foil.
d. Closely inspect the solder area and remove any excess or
splashed solder with a small wire-bristle brush.
-4-
LGE Internal Use Only
IC Remove/Replacement
Some chassis circuit boards have slotted holes (oblong) through
which the IC leads are inserted and then bent flat against the
circuit foil. When holes are the slotted type, the following technique
should be used to remove and replace the IC. When working with
boards using the familiar round hole, use the standard technique
as outlined in paragraphs 5 and 6 above.
Removal
1. Desolder and straighten each IC lead in one operation by gently
prying up on the lead with the soldering iron tip as the solder
melts.
2. Draw away the melted solder with an anti-static suction-type
solder removal device (or with solder braid) before removing the
IC.
Replacement
1. Carefully insert the replacement IC in the circuit board.
2. Carefully bend each IC lead against the circuit foil pad and
solder it.
3. Clean the soldered areas with a small wire-bristle brush.
(It is not necessary to reapply acrylic coating to the areas).
"Small-Signal" Discrete Transistor
Removal/Replacement
1. Remove the defective transistor by clipping its leads as close as
possible to the component body.
2. Bend into a "U" shape the end of each of three leads remaining
on the circuit board.
3. Bend into a "U" shape the replacement transistor leads.
4. Connect the replacement transistor leads to the corresponding
leads extending from the circuit board and crimp the "U" with
long nose pliers to insure metal to metal contact then solder
each connection.
Power Output, Transistor Device
Removal/Replacement
1. Heat and remove all solder from around the transistor leads.
2. Remove the heat sink mounting screw (if so equipped).
3. Carefully remove the transistor from the heat sink of the circuit
board.
4. Insert new transistor in the circuit board.
5. Solder each transistor lead, and clip off excess lead.
6. Replace heat sink.
Circuit Board Foil Repair
Excessive heat applied to the copper foil of any printed circuit
board will weaken the adhesive that bonds the foil to the circuit
board causing the foil to separate from or "lift-off" the board. The
following guidelines and procedures should be followed whenever
this condition is encountered.
At IC Connections
To repair a defective copper pattern at IC connections use the
following procedure to install a jumper wire on the copper pattern
side of the circuit board. (Use this technique only on IC
connections).
1. Carefully remove the damaged copper pattern with a sharp
knife. (Remove only as much copper as absolutely necessary).
2. carefully scratch away the solder resist and acrylic coating (if
used) from the end of the remaining copper pattern.
3. Bend a small "U" in one end of a small gauge jumper wire and
carefully crimp it around the IC pin. Solder the IC connection.
4. Route the jumper wire along the path of the out-away copper
pattern and let it overlap the previously scraped end of the good
copper pattern. Solder the overlapped area and clip off any
excess jumper wire.
At Other Connections
Use the following technique to repair the defective copper pattern
at connections other than IC Pins. This technique involves the
installation of a jumper wire on the component side of the circuit
board.
1. Remove the defective copper pattern with a sharp knife.
Remove at least 1/4 inch of copper, to ensure that a hazardous
condition will not exist if the jumper wire opens.
2. Trace along the copper pattern from both sides of the pattern
break and locate the nearest component that is directly
connected to the affected copper pattern.
3. Connect insulated 20-gauge jumper wire from the lead of the
nearest component on one side of the pattern break to the lead
of the nearest component on the other side.
Carefully crimp and solder the connections.
CAUTION: Be sure the insulated jumper wire is dressed so the
it does not touch components or sharp edges.
Diode Removal/Replacement
1. Remove defective diode by clipping its leads as close as
possible to diode body.
2. Bend the two remaining leads perpendicular y to the circuit
board.
3. Observing diode polarity, wrap each lead of the new diode
around the corresponding lead on the circuit board.
4. Securely crimp each connection and solder it.
5. Inspect (on the circuit board copper side) the solder joints of
the two "original" leads. If they are not shiny, reheat them and if
necessary, apply additional solder.
Fuse and Conventional Resistor
Removal/Replacement
1. Clip each fuse or resistor lead at top of the circuit board hollow
stake.
2. Securely crimp the leads of replacement component around
notch at stake top.
3. Solder the connections.
CAUTION: Maintain original spacing between the replaced
component and adjacent components and the circuit board to
prevent excessive component temperatures.
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
-5-
LGE Internal Use Only
SPECIFICATION
NOTE : Specifications and others are subject to change without notice for improvement.
1. Application range
3. Test method
This specification is applied to the LCD TV used LD84A
chassis.
2. Requirement for Test
1) Performance: LGE TV test method followed
2) Demanded other specification
- Safety: CE, IEC specification
- EMC: CE, IEC
Model
Each part is tested as below without special appointment.
32LG3000-ZA
Market
EU(PAL market)
1) Temperature : 25±5ºC (77±9ºF), CST : 40±5ºC
2) Relative Humidity : 65±10%
3) Power Voltage : Standard input voltage(100-240V~, 50/60Hz)
* Standard Voltage of each products is marked by models.
4) Specification and performance of each parts are followed
each drawing and specification by part number in
accordance with BOM.
5) The receiver must be operated for about 20 minutes prior to
the adjustment.
Appliance
Safety : IEC/EN60065
EMI : EN55013
EMS : EN55020
4. Module general specification
Item
Specification
Display Screen Device
32” wide Color Display Module
Aspect Ratio
16:9
LCD Module
32.0” TFT LCD HD
Remark
LCD
LG3000
MAKER : 32”- CMO
Operating Environment
Temp. : 0 ~ 40 deg
LGE SPEC
Humidity : 0 ~ 85%
Storage Environment
Temp. : -20 ~ 60 deg
Humidity : 0 ~ 85 %
Input Voltage
100 - 240V~, 50/60Hz
Power Consumption
Power on (Green)
32”
Type:110, Max:120
LCD + Backlight
Type Size
32”
760(H) x 450(V) x 47.4(D)
LG3000
Pixel Pitch
32”
0.17025(H) x 0.51075 (V)
LG3000
Back Light
32”
16CCFL, Straight type
LG3000
Display Colors
16.7M (16,777,216)
Coating
3H, AG
LG3000
With inverter
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
-6-
LGE Internal Use Only
5. Model general specification
Item
Market
Specification
Remark
EU (PAL Market-26 Countries)
DTV & Analog
UK, France, Germany, Spain, Sweden, Finland, Italy,
Netherland, Belgium, Luxemburg, Greece, Denmark,
Czech, Austria, Hngary, Switzerland, Croatia, Turkey
Analog Only
Poland, Portugal, Norway, Bulgaria, Serbia, Slovenia,
Russia, Romania
Broadcasting system
PAL-BG
PAL-DK
PAL-I/I’
SECAM L/L’
DVB-T(ID TV)
Receiving system
Analog : Upper Heterodyne
Digital : COFDM
Scart Jack (2EA)
PAL, SECAM
Scart 1 Jack is Full scart and support RF-OUT(analog).
Scart 2 Jack is Half scart and support MNT/DTV-OUT.
Video Input RCA(1EA)
PAL, SECAM, NTSC
4 System : PAL, SECAM, NTSC, PAL60
S-Video Input (1EA)
PAL, SECAM, NTSC
4 System : PAL, SECAM, NTSC, PAL60
Component Input(1EA)
Y/Cb/Cr
Y/ Pb/Pr
RGB Input(1EA)
RGB-PC
Analog (D-SUB 15PIN)
HDMI Input(3EA)
HDMI1-DTV/DVI
PC(HDMI version 1.3)
HDMI2-DTV
Support HDCP
HDMI3-DTV
Audio Input(3EA)
RGB/DVI Audio
L/R Input
Component
AV
SPDIF out(1EA)
SPDIF out
Earphone (1EA)
Antenna, AV1, AV2, AV3, Component,
RGB, HDMI1, HDMI2, HDMI
USB (1EA)
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
For service only
-7-
LGE Internal Use Only
6. Component Video Input (Y, PB, PR)
No
Specification
Remark
Resolution
H-freq(kHz)
V-freq(Hz)
1
720*480
15.73
60.00
SDTV, DVD 480i
2
720*480
15.63
59.94
SDTV, DVD 480i
3
720*480
31.47
59.94
480p
4
720*480
31.50
60.00
480p
5
720*576
15.625
50.00
SDTV, DVD 625 Line
6
720*576
31.25
50.00
HDTV 576p
7
1280*720
45.00
50.00
HDTV 720p
8
1280*720
44.96
59.94
HDTV 720p
9
1280*720
45.00
60.00
HDTV 720p
10
1920*1080
31.25
50.00
HDTV 1080i
11
1920*1080
33.75
60.00
HDTV 1080i
12
1920*1080
33.72
59.94
HDTV 1080i
13
1920*1080
26.97/27
23.97/24
HDTV 1080p
14
1920*1080
33.716/33.75
29.976/30.00
HDTV 1080p
15
1920*1080
56.250
50
HDTV 1080p
16
1920*1080
67.43/67.5
59.94/60
HDTV 1080p
7. RGB PC INPUT Mode
No
V-freq.(Hz)
Pixel clock(MHz)
1
720*400
Resolution
H-freq(kHz)
31.468
70.08
28.321
Proposed
2
640*480
31.469
59.94
25.17
37.684
75.00
31.50
3
800*600
37.879
60.31
40.00
46.875
75.00
49.50
4
832*624
49.725
74.55
57.283
Macintosh
5
1024*768
48.363
60.00
65.00
VESA(XGA)
56.470
70.00
75.00
VESA
Input 848*480 60Hz, 852*480 60Hz
-> 640*480 60Hz Display
VESA
60.123
75.029
78.75
6
1280*768
47.78
59.87
79.5
WXGA
7
1360*768
47.72
59.8
84.75
WXGA
8
1366*768
47.56
59.6
84.75
WXGA
9
1440*900
55.5
59.90
88.750
WXGA
19LG3000-ZA only
10
1400*1050
64.744
59.948
101.00
WSXGA
22LG3000-ZA only
11
1680*1050
65.16
59.94
147.00
WSXGA
22LG3000-ZA only
12
1280*1024
63.595
60.0
108.875
SXGA
FHD Model only
13
1920*1080
66.647
59.988
138.625
WUXGA
FHD Model only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
-8-
LGE Internal Use Only
8. HDMI DTV
No
Resolution
H-freq(kHz)
V-freq.(Hz)
Pixel clock(MHz)
Proposed
1
720*480
15.734 / 15.6
59.94 / 60
27.00
SDTV 480I
2
720*480
31.469 / 31.5
59.94 / 60
27.00/27.03
SDTV 480P
3
720*576
15.625
50
27(54)
SDTV 576I
4
720*576
31.25
50
54
SDTV 576P
5
1280*720
37.500
50
74.25
HDTV 720P
6
1280*720
44.96 / 45
59.94 / 60
74.17/74.25
HDTV 720P
7
1920*1080
33.72 / 33.75
59.94 / 60
74.17/74.25
HDTV 1080I
8
1920*1080
28.125
50.00
74.25
HDTV 1080I
9
1920*1080
26.97 / 27
23.97 / 24
74.17/74.25
HDTV 1080P
10
1920*1080
33.716 / 33.75
29.976 / 30.00
74.25
HDTV 1080P
11
1920*1080
56.250
50
148.5
HDTV 1080P
12
1920*1080
67.43 / 67.5
59.94 / 60
148.35/148.50
HDTV 1080P
9. HDMI PC
No
Resolution
H-freq(kHz)
V-freq.(Hz)
Pixel clock(MHz)
Proposed
Remark
1
720*400
31.468
70.08
28.321
HDCP
2
640*480
31.469
59.94
25.17
VESA
HDCP
37.684
75.00
31.50
37.879
60.31
40.00
VESA
HDCP
46.875
75.00
49.50
3
800*600
4
832*624
49.725
74.55
57.283
Macintosh
HDCP
5
1024*768
48.363
60.00
65.00
VESA(XGA)
HDCP
56.470
70.00
75.00
60.123
75.029
78.75
6
1280*768
47.78
59.87
79.5
WXGA
HDCP
7
1360*768
47.72
59.8
84.75
WXGA
HDCP
8
1366*768
47.56
59.6
84.75
WXGA
HDCP
9
1440*900
55.5
59.90
88.750
WXGA
19LG3000-ZA only
10
1400*1050
64.744
59.948
101.00
WSXGA
22LG3000-ZA only
11
1680*1050
65.16
59.94
147.00
WSXGA
22LG3000-ZA only
12
1280*1024
63.595
60.0
108.875
SXGA
FHD Model only, HDCP
13
1920*1080
66.647
59.988
138.625
WUXGA
FHD Model only, HDCP
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
-9-
LGE Internal Use Only
ADJUSTMENT INSTRUCTION
5. Click “Auto” tab and set as below
6. Click “Run”.
7. After downloading, check “OK” message.
1. Application Range
This specification sheet is applied to all of the LCD TV with
LD84A chassis.
(5)
filexxx.bin
2. Designation
(7) ........ OK
1) The adjustment is according to the order which is
designated and which must be followed, according to the
plan which can be changed only on agreeing.
2) Power Adjustment: Free Voltage
3) Magnetic Field Condition: Nil.
4) Input signal Unit: Product Specification Standard
5) Reserve after operation: Above 5 Minutes (Heat Run)
Temperature : at 25±5ºC
Relative humidity : 65±10%
Input voltage : 220V, 60Hz
6) Adjustment equipments: Color Analyzer (CA-210 or CA110), Pattern Generator (MSPG-925L or Equivalent), DDC
Adjustment Jig equipment, SVC remote controller
7) Don’t push The “IN STOP KEY” after completing the
function inspection.
(6)
* USB DOWNLOAD
1) Put the USB Stick to the USB socket
2) Automatically detecting update file in USB Stick
- If your downloaded program version in USB Stick is Low,
it didn’t work. But your downloaded version is High, USB
data is automatically detecting
3) Show the message “Copying files from memory”
3. Main PCB check process
* APC - After Manual-Insult, executing APC
* Download
1) Execute ISP program “Mstar ISP Utility” and then click
“Config” tab.
2) Set as below, and then click “Auto Detect” and check “OK”
message. If display “Error”, Check connect computer, jig,
and set.
3) Click “Connect” tab. If display “Can’t”, Check connect
computer, jig, and set.
(1)
4) Updating is staring.
(3)
Please Check Speed :
To us speed between from 200 KHz
to 400 KHz
(2)
OK
4) Click “Read” tab, and then load download file(XXXX.bin) by
clicking “Read”.
(4)
filexxx.bin
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 10 -
5) Updating Completed, The TV will restart automatically.
6) If your TV is turned on, check your updated version and
Tool option. (explain the Tool option, next stage)
* If downloading version is more high than your TV have,
TV can lost all channel data. In this case, you have to
channel recover. if all channel data is cleared, you didn’t
have a DTV/ATV test on production line.
LGE Internal Use Only
Impress Resolution 1080i
Model : 223 in Pattern Generator(1080i Mode)
Pattern: 65 in Pattern Generator(MSPG-925 series)
* After downloading, have to adjust TOOL OPTION again.
1) Push "IN-START" key in service remote controller
2) Select "Tool Option 1" and Punch in the number.(Each
model has their number.)
32LG5000-ZA : 8977
3) Completed selecting Tool option
3.1. ADC Process
(1) PC input ADC
1) Auto RGB Gain/Offset Adjustment
- Convert to PC in Input-source
- Signal equipment displays
Output Voltage : 700 mVp-p
Impress Resolution XGA (1024 x 768 @ 60Hz)
Model : 60 in Pattern Generator
Pattern : 65 in Pattern Generator (MSPG-925 Series)
<Fig. 1> Adjustment pattern(COMPONENT)
- Adjust by commanding AUTO_COLOR_ADJUST.
2) Confirmation
- We confirm whether “0xB3 (480i)/0xBC (1080i)”
address of EEPROM “0xA2” is “0xAA” or not.
- If “0xB3 (480i)/0xBC(1080i)” address of EEPROM
“0xA2” isn’t “0xAA”, we adjust once more.
- We can confirm the ADC values from “0xAD~0XB2
(480i)/0XB6~BB (1080i)” addresses in a page “0xA2”.
* Manual ADC process using Service Remocon. After
enter Service Mode by pushing “ADJ” key, execute
“ADC Adjust” by pushing “ G ” key at “ADC
CALIBRATION :COMPONENT”.
<Fig. 1> Adjustment pattern(PC)
Impress Resolution 480i
- Adjust by commanding AUTO_COLOR_ADJUST.
2) Confirmation
- We confirm whether “0xAA (RGB)” address of
EEPROM “0xA2” is “0xAA” or not.
- If “0xAA (RGB)” address of EEPROM “0xA2” isn’t
“0xAA”, we adjust once more
- We can confirm the ADC values from “0xA4~0XA9
(RGB)” addresses in a page “0xA2”
* Manual ADC process using Service Remocon. After
enter Service Mode by pushing “ADJ” key,
execute “ADC Adjust” by pushing “ G ” key at “ADC
CALIBRATION: RGB-PC”.
Impress Resolution 1080i
(2) COMPONENT input ADC
1) Component Gain/Offset Adjustment
- Convert to Component in Input-source
- Signal equipment displays
Impress Resolution 480i
3.2. Function Check
(1) Check display and sound
MODEL : 209 in Pattern Generator(480i Mode)
Pattern : 65 in Pattern Generator (MSPG-925 series)
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 11 -
- Check Input and Signal items. (cf. work instructions)
1) TV
2) AV (SCART1/SCART2/S-VHS/CVBS)
3) COMPONENT (480i)
4) RGB (PC : 1024 x 768 @ 60hz)
5) HDMI
6) PC Audio In
* Display and Sound check is executed by Remote
controller.
LGE Internal Use Only
4.3 DDC EDID Write (RGB 128Byte )
4. Total Assembly line process
- Connect D-sub Signal Cable to D-Sub Jack.
- Write EDID DATA to EEPROM (24C02) by using DDC2B
protocol.
- Check whether written EDID data is correct or not.
4.1. Adjustment Preparation
(1) W/B Equipment condition
CA210: CH 9, Test signal: Inner pattern (85IRE)
(2) Above 5 minutes H/run in the inner pattern. (“power on”
key of adjust remote control)
(3) 15 Pin D-Sub Jack is connected to the AUTO W/B
EQUIPMENT.
(4) Adjust Process will start by execute I2C Command (Inner
pattern (0xF3, 0xFF).
Color
Cool
11,000
Temperature
ºK X=0.276(±0.002)
Y=0.283(±0.002)
Medium 9,300
ºK X=0.285(±0.002)
Warm
ºK X=0.313(±0.002)
- Connect HDMI Signal Cable to HDMI Jack.
- Write EDID DATA to EEPROM(24C02) by using DDC2B
protocol.
- Check whether written EDID data is correct or not.
<Test Signal>
Inner patern
(216gray,85IRE)
4.5 Serial number (RS-232C)
Y=0.293(±0.002)
6,500
4.4. DDC EDID Write (HDMI 256Byte)
- Press “Power on” key of service remocon. (Baud rate :
115200 bps)
- Connect RS232 Signal Cable to RS-232 Jack.
- Write Serial number by use RS-232.
- Must check the serial number at the Diagnostics of SET UP
menu. (Refer to below).
Y=0.329(±0.002)
(5) Adjust Process will finish by execute I2C Command (Inner
pattern (Inner pattern (0xF3,0x00)).
** Caution **
Color Temperature: COOL, Medium, Warm
One of R Gain/G Gain/ B Gain should be kept on 0xC0, and
adjust other two lower than C0.
(when R/G/B Gain are all C0, it is the FULL Dynamic Range
of Module)
* Manual W/B process using adjusts Remote control.
After enter Service Mode by pushing “ADJ” key,
Enter White Pattern off of service mode, and change off -> on.
Enter “W/B ADJUST” by pushing “G” key at “3.W/B ADJUST”.
4.6. EDID DATA
(1) ANALOG DATA 128Byte (2Bi)
* After done all adjustments, Press “In-start” button and
compare Tool option and Area option value with its BOM, if it
is correctly same then unplug the AC cable.
If it is not same, then correct it same with BOM and unplug
AC cable.
For correct it to the model’s module from factory JIG model.
(2) DIGITAL DATA(HDMI-1) 256Byte
* Don’t push The “IN STOP KEY” after completing the function
inspection.
4.2. DPM operation confirmation
(Only Apply for MNT Model)
Check if Power LED Color and Power Consumption operate
as standard.
- Set Input to RGB and connect D-sub cable to set
- Measurement Condition: (100~240V@ 50/60Hz)
- Confirm DPM operation at the state of screen without Signal
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 12 -
LGE Internal Use Only
(3) DIGITAL DATA(HDMI-2) 256Byte
4.12 Internal pressure
Confirm whether is normal or not when between power
board's ac block and GND is impacked on 1.5kV(dc) or
2.2kV(dc) for one second
(4) DIGITAL DATA(HDMI-3) 256Byte
1) All Data : HEXA Value
2) Changeable Data :
*: Serial No : Controlled / Data:01
**: Month : Controlled / Data:00
***:Year : Controlled
****:Check sum
4.7. HDCP (High-Bandwidth Digital Contents Protection)
SETTING (Scaler : Mstar)
- Connect D-sub Signal Cable to D-Sub Jack
- Input HDCP key with HDCP-key- in-program
- HDCP Key value is stored on EEPROM (AT24C512) which
is 0x80 addresses of 0xA0 page
- AC off/ on and on HDCP button of MSPG925 and confirm
whether picture is displayed or not of using MSPG925
- HDCP Key value is different among the sets.
4.11 Outgoing condition Configuration
When pressing IN-STOP key by SVC remocon, Red LED are
blinked alternatively. And then Automatically turn off. (Must
not AC power OFF during blinking)
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 13 -
LGE Internal Use Only
TROUBLESHOOTING
1. No Power
(1) Symptom
1) It is not discharged minutely from the module.
2) Light does not come into the front LED.
(2) Check process
No
Is inserted a plugged
in power cord?
Plug in the power cord.
Yes
Is the Line Filter
and Power Board Cable
connected?
Is the fuse of PSU
normal?
No
Connect the Cable.
No
Replace the Fuse.
Yes
Is it connected
that PSU and P1100 in
Main B/D?
No
Connect the Cable P1100.
Yes
If there is normal status,
Replace main board.
After all cables connect is removed to PSU, the AC voltage
marking is authorized on manual.
When ST-BY 5V, +15V are not operated, replace PSU.
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 14 -
LGE Internal Use Only
2. No Raster
(1) Symptom
1) No OSD abnd image occur at screen.
2) It maintains the conditioon where the front LED is blue.
(2) Check process
No
No
Does minute discharge
at Module?
Is the inverter on?
Is output the normality
Low/High voltage except
Stand-by 5V?
No
Replace the Power board.
Yes
Check the LCD Module.
Is the link
cable normal?
No
Reconnect Panel link cable.
(P401 or P406 or P407)
Yes
No
Is the IC801’s
output normal?
Replace the Main board.
Yes
Change the IC(IC100).
* Caution
Before change Main Board,
Check S/W version and White Balance value.
Change Main bord.
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 15 -
S/W download and set White Balance value.
LGE Internal Use Only
3. Unusual display from TV/CATV mode
Is video
output of the Tuner
normal?(CheckTU500
_Pin15)
No
Yes
Is the input
voltage normal?(Check
TU500_Pin4)
Is the LVDS cable
connected well?
Yes
Replace Main board.
No
No
Check the Power.
Yes
Is the
I2C communication
Normal?(Check Pin10,
Pin11)
Check the Tuner.
No
Cable inserts well.
Yes
Change the IC(IC100).
BLOCK A
4. Unusual display from DTV mode
Is video
output of the tuner
normal?(Check TU500_
pin24~pin34)
No
Is the input
voltage normal?(Check
Pin21,22)
No
Yes
Same as Block A.
Yes
Yes
Replace Main board.
No
Check the Power.
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Is the I2C
communication Normal?
(Check Pin18,
Pin19)
Check the Tuner.
- 16 -
LGE Internal Use Only
5. Unusual display from AV1/AV2(SCART) mode
- CVBS Input
- RGB Input
Is video
input of SCART Jack
normal?(Check JK600,
JK601_Pin20)
Is video
input of the RGB Jack
normal?(Check JK600
_Pin7,11,15)
No
Check the input source.
Yes
No
Check the input source.
Yes
If there is normal status,
Replace main board.
Same as Block A.
Is waveform
of Switching IC normal?
(Check IC700_Pin11,
12,13)
No
Check the IC700.
No
If there is normal status,
Replace main board.
Same as Block A.
6. Unusual display from AV3(SIDE AV) mode
- CVBS Input
Is video input
of RCA Jack normal?
(Check R704)
No
Check the input source.
Yes
If there is normal status,
Replace main board.
Same as Block A.
7. Unusual display from Component mode
- CVBS Input
Is video input
of the Component Jack
normal?(Check R733,
734,735)
No
Check the input source.
Yes
If there is normal status,
Replace main board.
Same as Block A.
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 17 -
LGE Internal Use Only
8. Unusual display from RGB mode
Is video input
of the RGB jack normal?
(Check JK703_Pin1,
2,3,13,14)
No
Check the input source.
Yes
Is waveform
of Switching IC normal?
(Check IC700_Pin11,
12,13)
No
Check the IC700.
No
If there is normal status,
Replace main board.
Same as Block A.
9. Unusual display from HDMI 1/2/3 mode
Is video
input of the HDMI jack
normal? (Check JK900,
901,902)
No
Check the input source.
Yes
Check DDC
communication
lines(IC900,901,903
_Pin5,6
No
Check the IC900, IC901, IC903.
Yes
Check HDCP
communication lines
(IC902)
No
Check the IC902 and DHCP value
Yes
Is waveform
of Switching IC normal?
(Check IC902)
No
Check the IC902.
No
If there is normal status,
Replace main board.
Same as Block A.
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 18 -
LGE Internal Use Only
10. No Sound
(1) Symptom
1) LED is blue
2) Screen display but sound is not output.
(2) Check process
No
Is the speaker
“on” on menu?
All input is no sound?
No
Is the Speaker
cable normal?
Download the EDID data.
No
Check th Speaker cable.
Yes
Yes
No
Only RF or DTV
is no sound?
Set on speaker on menu.
Yes
Yes
Only HDMI is
no Sound?
No
IC100 operate
normally?
Check the Tuner in/Out.
No
Replace IC100.
Yes
IC1000 operate
normally?
No
Replace IC1000.
Yes
Replace main board.
* Caution
Before change Main Board,
Check S/W version and White Balance value.
Change Main bord.
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 19 -
S/W download and set White Balance value.
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 20 -
EEPROM
TMDS x3
HPD x3
HDMI
Switch
(IC902)
5V_HDMI
KIC7SZ32FU
(IC802)
CI_CD_1/2
TS_Serial
HDMI_CEC x3
(P800)
CI Slot
PCM_DATA
HDMI_I2C
HDMI_CEC/Rx/HPD
74LVC541A
(IC800)
TPA6110A2
(IC1002)
Saturn3+
I2C
24C512
(IC105)
PCM_ADD
HDMI_I2C_0
R/G/B
DDC/UART-Tx/Rx
STMAV340
(IC700)
RESET
KIA7427
(IC104)
TS_Parallel
EEPROM
EEPROM
EEPROM
74HC4066
(IC1001)
MAX3232
(IC702)
USB_DM/DP
COMP_L/R_IN
COMP_Y/Pb/Pr
I2C_D_TU / I2C_A_TU
TU_TS_DATA
SIF
BOOSTER
TV_CVBS
5V_ANT_MNT
PC_L/R_IN
DSUB_H/V_SYNC
DSUB_R/G/B
SC1_R/G/B
SC1_TV_VOUT
SC1_CVBS_IN
TV_L/R_OUT
SC1_L/R_IN
DTV/MNT_V_OUT
SC2_CVBS_IN
SC2_L/R_IN
DTV/MNT_L/R_OUT
IIS
I/O Expander
(IC103)
LVDS
IIC(Eye Q II)
KEY1/2
LED_G/R & IR
P1000
52/47/42/37” : FHD
32”: : HD
SP (R)
SP (L)
LCD Panel
NTP3000A
(IC1000)
DDR Memory
DDR Memory
256Mb (IC300)
256Mb (IC300)
Flash Memory
4MB (IC101)
Flash Memory
4MB (IC102)
MUTE
I2C_A_TU
BLOCK DIAGRAM
PCM_CD_ON
SPDIF Out
Head phone Out
Side_Y/C/V/L/R
TV Tuner
LGE Internal Use Only
MEMO
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 21 -
LGE Internal Use Only
903
905
805
901
910
550
904
821
540
803
900
300
500
510
121
122
200
120
902
801
802
800
804
530
521
400
830
401
EXPLODED VIEW
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 22 -
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
P/NO : MFL41037107
Feb., 2008
Printed in Korea
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