PARTS REPLACEMENT

11. Paper Feed Motor Unit

(1) Remove

•

Platen unit according to the procedure described in item 9.

•

Two screws [1]

•

Paper feed motor unit [2]

– 48 –

CHAPTER 5

MAINTENANCE AND LUBRICATION

1.

Maintenance ........................................................................................................ 51

1-1.

Cleaning .................................................................................................................

51

1-2.

Checks ...................................................................................................................

51

2.

Lubrication ........................................................................................................... 52

2-1.

Lubricant ................................................................................................................

52

2-2.

Lubricating Method ...............................................................................................

52

2-3 Lubricated Areas ...................................................................................................

52

3

4

5

1

2

6

7

– 50 –

MAINTENANCE AND LUBRICATION

1.

Maintenance

In order to maintain the optimum performance of this printer and to prevent trouble, maintenance must be carried out according to the following items.

1-1. Cleaning

(1) Removal of dirt

Wipe off dirt with a soft cloth soaked in alcohol or benzine.

*Note: Do not use thinner, trichlene or ketone solvents because they may damage plastic parts. Also during cleaning, be careful not to moisten or damage electronic parts, wiring, or mechanical parts.

(2) Removal of dust, pile, etc.

Vacuum cleaning (with an electric cleaner) is preferred. Remove all dust, etc., inside the printer.

*Note: After cleaning, check the oil level. If it is not adequate due to cleaning, replenish it.

1-2. Checks

Checks must be carried out at two levels: a “daily check” which the operator can easily carry out during operation, and a “periodic check” which an expert should carry out.

(1) Daily check

When the printer is used on a daily basis, check that the printer is used properly. Make sure that the printer is

•

• operating under the best conditions.

•

Is any paper stuck in the paper box or printer case?

Is the cartridge ribbon set at the right position?

Is there any foreign matter inside the printer? (Remove if any.)

•

Is the print head getting excessively dirty?

(2) Periodic check

•

•

After 6 months or printing 1 million lines, the periodic check and lubrication must be carried out.

•

Check for deformation of springs.

Check the gap between the platen and the print head.

Remove dust, dirt, etc., around the detectors.

– 51 –

MAINTENANCE AND LUBRICATION

2.

Lubrication

Lubrication is very important to maintain optimum performance and to prevent trouble.

2-1. Lubricant

The type of lubricant greatly affects the performance and durability of the printer, especially in a low temperature environment. We recommend use of the grease and lubrication oils listed below for this printer.

Type of oil

Grease

Lubricant

Product name

FLOIL GB-TS-0

KF96 (1000 cs)

Mobil 1

Maker

Kanto Chemicals Co., LTD.

Shinetsu Chemical Industry

Mobil oil

2-2. Lubricating Method

When lubrication is carried out in assembly and disassembly, wash parts well to remove dust and dirt before lubrication.

Lubrication must be carried out regularly once every 6 months or after 1 million lines have been printed. Lubrication is necessary irrespective of the regular lubrication whenever lubricant becomes deficient after cleaning or whenever parts have been disassembled or replaced.

[13]

[14]

[15]

[16]

[9]

[10]

[11]

[12]

[5]

[6]

[7]

[8]

NO.

[1]

[2]

[3]

[17]

[18]

[19]

[20]

[21]

[22]

2-3. Lubricated Areas

Lubricating Point

Rubbing surface of TM pulley B and pulley shaft

Rubbing surface of pulley cap and stop ring

Rubbing surface of gear 58

×

0.5 and gear shaft

Rubbing surface of lift cam and shaft

Rubbing surface of gear B and shaft

Rubbing surface of gear A and shaft

Rubbing surface of ribbon change lever and carriage

Rubbing surface of lift lever and shaft

Rubbing surface of lift lever and carriage

Rubbing surface of lift lever and lift cam

Rubbing surface of ribbon change lever and lift cam

Rubbing surface of gear cover and three gears

Rubbing surface of adjusting lever and frame

Rubbing surface of bushing and carriage stay

Rubbing surface of tractor frame assy and shaft

Rubbing surface of idler gear 16

×

72

×

0.5 and shaft

Rubbing surface of idler gear 36

×

0.5 and shaft

Rubbing surface of color ribbon holder and carriage

Rubbing surface of PF idler gear 28

×

0.5 and shaft

Rubbing surface of PF clamp lever and shaft

Rubbing surface of roller holder and lower case

Grease/Oil

GB-TS-0

GB-TS-0

GB-TS-0

KF96

GB-TS-0

GB-TS-0

KF96

KF96

KF96

KF96

KF96

GB-TS-0

GB-TS-0

Mobil 1

GB-TS-0

GB-TS-0

GB-TS-0

GB-TS-0

GB-TS-0

GB-TS-0

GB-TS-0

– 52 –

MAINTENANCE AND LUBRICATION

Fig. 5-1 Lubricated Areas 1

– 53 –

MAINTENANCE AND LUBRICATION

Fig. 5-2 Lubricated Areas 2

Fig. 5-3 Lubricated Areas 3

– 54 –

CHAPTER 6

TROUBLESHOOTING

TROUBLESHOOTING

1.

Troubleshooting Procedures .............................................................................

57

2.

Unit Replacement Priority Chart ........................................................................

58

3.

Repair by Unit Replacement ..............................................................................

59

4.

Repair by Parts Replacement ............................................................................

65

4-1.

Does not Operate at All with Power on ............................................................... 65

4-2.

Power Supply Circuit Abnormal .......................................................................... 66

4-3.

Defective Motor Operation ................................................................................... 67

4-4.

Defective Print Head Operation ........................................................................... 68

4-5.

Defective Interface Operation .............................................................................. 69

6

– 55 –

TROUBLESHOOTING

– 56 –

TROUBLESHOOTING

1.

Troubleshooting Procedures

Troubleshooting is never easy because various problems arise depending upon the particular location of the breakdown.

The following procedures should be taken in making repairs.

(1) The first method is to make repairs through unit replacements. The two display codes appearing in the flow chart are defined as follows: 1) indicates main logic board replacement; and 2) indicates printer mechanism replacement, to be carried out if the problem has not been corrected.

1)

2)

Main Logic Board Replacement

Printer Mechanism Replacement

Check again at this time whether the replaced unit is malfunctioning. (This is done to rule out trouble caused by improper contact of connectors.)

Replaceable units consist of the following:

•

Power supply unit

•

Main logic board

•

Printer mechanism

•

Control panel board

In replacing these units, always refer to the unit replacement priority chart.

(2) The second method is to make repairs by parts replacement to replace defective elements inside a particular unit.

(Note 1) Before starting to repair, be sure to check visually the contact of the connector and the mounting of the IC in the IC socket.

(Note 2) Always turn off power source and remove power plug before replacing any units or parts.

(Note 3) All check items shown in the fiow chart must be checked. Otherwise, newly mounted parts or units may become damaged.

(Note 4) If, in the process of making repairs, there is any confusion about proper procedures, restart the job from the beginning.

(Note 5) Be careful to avoid injury from static electricity when handling ICs and main logic board.

– 57 –

TROUBLESHOOTING

2.

Unit Replacement Priority Chart

Category

Problem

Details

Power supply unit

Unit Exchange Sequence

Main logic board

Printer mechanism

Specific display lamp only will not glow

Specific switch only cannot be input

Buzzer does not sound (sound volume inadequate)

Strange sounds during operation

No motor holding power

(power very weak)

Dots skipped

Print is too light

Ink ribbon entanglement

(wire sticks out)

Absence of paper not detected

Lever position not detected

Incorrect printing

Ink ribbon not forwarded

No operation at

DIP switch setting

Faulty operation when power is turned on/off

Abnormal motor operating speed

(slow)

Fuse blown during operation

Error detection of head temperature

CR Home position error

CR motor error

RAM check error

EE-PROM check error

Color ribbon error

2

3

2

2

1

1

1

2

2

2

2

1

1

1

1

1

2

2

1

1

1

1

2

1

2

2

Control panel board

1

1

Remarks

Replace ink ribbon

Check I/F cable

EDS mode

1 2

2 1

“ON LINE” lamp blink

2

2

1

1

1

“POWER” and “QUIET” lamp blink

“POWER” lamp blink

“QUIET” lamp blink

1

“QUIET” and “ON LINE” lamp blink

2 1

“POWER”, “ON LINE” and “QUIET” lamps blink

Note: The figures 1, 2 and 3 mean the priority of replacement.

– 58 –

TROUBLESHOOTING

3.

Repair by Unit Replacement

START

* Turn power off.

* Remove I/F cable.

* Mount ink ribbon.

* Set paper.

* Move carriage to center.

Turn power on.

Carriage

Moves?

YES

Carriage operates normally?

YES

NO

NO

A

B

Carriage motor operating waveform is normal? *1

YES

NO

*1 See (6) and (7) waveform in item 10 of Chapter 7.

Replace printer mechanism.

1) Replace main logic

board.

2) Replace printer

mechanism.

A

Carriage once stops at home position, and move the center?

YES

NO

Home position switch signal is normal?

YES

Replace main logic board.

NO

1) Replace main logic

board.

2) Replace printer

mechanism.

1

A

– 59 –

TROUBLESHOOTING

1

On line lamps light?

YES

NO

Press on line switch to take off line.

On line lamp signal is normal?

YES

Replace control panel board.

NO

Replace main logic board.

On line lamp is out?

YES

Press paper feed switch.

NO

E

A

Paper feed switch operation is normal?

YES

NO

Turn power off.

Holding paper feed switch, turn power on.

Self printing:

Paper feed motor drive waveform is normal? *2

YES

Replace printer mechanism.

*2 See (8) and (9) waveform in item 10 of Chapter 7.

NO

1) Replace main logic board.

2) Replace printer mechanism.

Carriage operates normally?

YES

NO

A

Carriage motor drive waveform is normal? *1

YES

Replace printer mechanism.

*1 See (6) and (7) waveform in item 10 of Chapter 7.

NO

1)

2)

Replace main logic board.

Replace printer mechanism.

2

A

– 60 –

TROUBLESHOOTING

2

Printing operation is normal?

YES

NO

Print head drive signal waveform is normal? *3

YES

Replace printer mechanism.

*3 See (4) and (5) waveform in item 10 of Chapter 7.

NO

1) Replace main logic board.

2) Replace printer mechanism.

A

Paper feed operation is normal?

YES

Ribbon feed operation is normal?

YES

NO

NO

Terminates self printing.

Check host computer connection.

Turn power off and check

I/F cable.

Turn power on.

Send print program from host computer.

1) Replace ink ribbon.

2) Replace printer mechanism.

A

C

*2 See (8) and (9) waveform in item 10 of Chapter 7.

Paper feed

motor drive waveform is normal? *2

NO

YES

1) Replace main logic board.

2) Replace printer mechanism.

Replace printer mechanism.

A

3

– 61 –

TROUBLESHOOTING

3

NO

Printing begins?

YES

Printing operation normal?

YES

Stop print program.

NO

END

B

Carriage moves with hand?

YES

NO

Output

(+25V, +5V) of power supply unit is normal? *4

NO

Turn power off.

YES

Fuse blows out?

YES

Replace fuse.

Remove connector CN5 from main logic board.

Turn power on.

NO

4

D

1) Replace I/F cable.

2) Replace main logic board.

3) Check host computer.

C

Replace printer mechanism.

1) Replace main logic board.

2) Replace printer mechanism.

3) Replace control panel board.

Replace power supply unit.

A

*4

+25V Line

+5V Line

+25V

±

5% Between Pin 1 and Pin 2 of CN1

+5V

±

2.5% Between Pin 4 and Pin 3 of CN1

– 62 –

4

Output of power supply unit is normal? *4

YES

Turn power off.

NO

Remove connector CN5 from main logic board.

Turn power on.

Fuse blows out?

YES

Replace fuse.

1) Replace main logic board.

2) Replace printer mechanism.

3) Replace control panel board.

NO

A

*4

+25V Line

+5V Line

+25V

±

5% Between Pin 1 and Pin 2 of CN1

+5V

±

2.5% Between Pin 4 and Pin 3 of CN1

Replace power supply unit.

TROUBLESHOOTING

– 63 –

TROUBLESHOOTING

D

*5 See (10) waveform in item 10 of Chapter 7.

YES I/F signal is normal? *5

NO

Ready condition?

YES

There is data transmission?

NO

Check hardware or host computer print program.

NO

YES

I/F mode set up properly?

NO

Change I/F mode.

YES

1) Replace I/F cable.

2) Replace main logic board.

A

C

E

On line switch goes ON/OFF?

YES

On line lamp drive signal is normal?

YES

Replace control panel board.

NO

NO

Replace main logic board.

1) Replace control panel board.

2) Replace main logic board.

A

– 64 –