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Lexmark 2380 Service Manual - Page 61

Diagnostic Information 2-37, Perform the Printhead-to-Platen Gap

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FRU 1 Printhead Action Continuity Table The correct resistance is: 2.8 to 3.8 ohms (238X) or 7 to 15 ohms (239X). 238X CP9-10 & CP9-12 (Dot1) CP9- 6 & CP9- 4 (Dot2) CP9-17 & CP9-14 (Dot3) CP9- 7 & CP9- 3 (Dot4) CP9-15 & CP9-11 (Dot5) CP9- 1 & CP9- 5 (Dot6) CP9-18 & CP9-13 (Dot7) CP9- 2 & CP9- 8 (Dot8) CP9-16 & CP9- 9 (Dot9) 239X CP8-10 & CP8-13 (Dot1) CP8- 8 & CP8- 7 (Dot2) CP8-12 & CP8-13 (Dot3) CP8- 6 & CP8- 7 (Dot4) CP8-14 & CP8-11 (Dot5) CP8- 4 & CP8- 7 (Dot6) CP8-16 & CP8-11 (Dot7) CP8- 2 & CP8- 9 (Dot8) CP8-18 & CP8-11 (Dot9) CP8- 1 & CP8- 9 (Dot10) CP8-17 & CP9-10 (Dot11) CP8- 3 & CP8- 9 (Dot12) CP8-15 & CP9-10 (Dot13) CP8- 5 & CP9- 8 (Dot14) CP9-16 & CP9-12 (Dot15) CP9- 4 & CP9- 8 (Dot16) CP9-17 & CP9-12 (Dot17) CP9- 2 & CP9- 8 (Dot18) CP9-15 & CP9-12 (Dot19) CP9- 1 & CP9- 6 (Dot20) CP9-13 & CP9-14 (Dot21) CP9- 3 & CP9- 6 (Dot22) CP9-11 & CP9-14 (Dot23) CP9- 5 & CP9- 6 (Dot24) If the problem is not missing or extra dots or lines, do the following: • Make sure the printhead is securely installed in the carrier. • Perform the Printhead-to-Platen Gap adjustment. Diagnostic Information 2-37

Section	Page
Safety Notices	7
1. General Information	13
Description	13
Specifications	15
Recommended Machine Usage	15
Options	16
Tools	16
Abbreviations	17
Setup Mode	18
How To Change The Printer Functions	18
Serial Interface Adapters	19
Serial Interface Switches	20
Function Switch Setting	20
2. Diagnostic Information	25
Start	25
Voltage, Ground, And Continuity Readings	25
Error Indication Table	26
Symptom/Check Table	30
Irrecoverable Operator Errors	37
Service Checks	38
Abnormal Noise Service Check	38
Auto Sheet Feeder (ASF) Service Check	39
Carrier Drive, Home Position Sensor, Ribbon Feed Service Check	41
Intermittent Problem Service Check	44
No Print or Abnormal Print Service Check	47
Operator Panel Service Check	48
Paper Empty Sensor Service Check	50
Paper Feed Service Check	51
Paper Select Sensor Service Check	54
POST Service Check	55
Power Service Check	56
Print Speed Service Check	58
Printhead Service Check	60
Pull Tractor Sensor Service Check	62
Top of Forms Problem Service Check	63
Tractor 2 Service Check	64
3. Diagnostic Aids	69
Power-On Self Test (POST)	70
Print Test	71
Hex Dump Mode	73
Serial Interface Adapter Print Test	74
4. Repair Information	75
Handling ESD-Sensitive Parts	75
Adjustments	76
Printhead-to-Platen Gap Adjustment	76
Bidirectional Print Adjustment	79
Removal Procedures	81
Auto Sheet Feeder Gears Removal	82
Auto Sheet Feeder Pick-up Roller Removal	83
Bottom Cover Removal	84
Carrier Removal	86
Carrier Motor Assembly Removal	90
Carrier Plate Removal	92
Download or Print Buffer Module Removal	95
Form Thickness Lever Removal	96
Head Gap Sensor Removal (238X-001)	97
Head Gap Sensor Removal (23XX-002, 003)	98
Home Position Sensor Removal	99
Label Jam Removal	100
Left Side Frame Removal	102
Lower Feed Roller Removal	104
Lower Pinch Roller Removal	106
Main Logic Board Removal	107
Operator Panel Assembly Removal	108
Paper Empty Sensor And Spring Removal	110
Paper Feed Motor Removal	112
Paper Guide Removal (Left And Right)	113
Paper Guide / Platen Assembly Removal	114
Paper Select Lever Removal	116
Paper Select Sensor Removal	117
Paper Separator Removal	118
Power Supply Removal	120
Print Unit Removal	121
Printhead Removal	122
Printhead Cables Removal	123
Pull Tractor Removal	124
Pull Tractor Actuator Removal	125
Pull Tractor Sensor Removal	126
Push Tractor Assembly Removal	127
Ribbon Drive Rack Gear Removal	128
Right Side Frame Removal	130
Right Side Frame Gears Removal	132
Sub Logic Board Removal	133
Tension Pulley Plate Assembly	134
Top Cover Removal	135
Top of Form Sensor, Sensor Flag And Spring Removal	138
Upper Feed Roller Removal	140
5. Connector Locations	141
Front View	142
Rear View	143
Tractor 2 Cable Connectors	144
Wiring Diagrams	145
Block Diagram 238X-001	145
Block Diagram 239X-001	146
Block Diagram 238X-002	147
Block Diagram 239X-002	148
Block Diagram 238X-003	149
Block Diagram 239X-003	150
Signal Connections	151
Connector Locations	160
Main Logic Board 23XX-001	160
Main Logic Board 23XX-002	161
Main Logic Board 23XX-003	162
Sub Logic Boards	163
Power Supply	165
Operator Panel	166
6. Preventive Maintenance	167
Lubrication	167
Specified Lubricants	167
Lubrication Points	168
Lubrication Points (Oil)	169
Lubrication Points (Grease)	170
7. Parts Catalog	173
How To Use This Parts Catalog	173
Assembly 1: Major Components	174
Assembly 2: Covers	178
Assembly 3: Carrier	182
Assembly 4: Paper Guide / Platen / Feed Roller	186
Assembly 5: Electronics	190
Assembly 6: ASF - Roller / Support	196
Assembly 7: ASF - Side Frame / Covers	198
Assembly 8:Tractor 2 Option	200

Match case Limit results 1 per page

Diagnostic Information 2-37

Printhead

Continuity Table

The correct resistance is:

2.8 to 3.8 ohms (238X) or 7 to 15 ohms (239X).

238X

CP9-10 & CP9-12 (Dot1)

CP9-

6 & CP9-

4 (Dot2)

CP9-17 & CP9-14 (Dot3)

CP9-

7 & CP9-

3 (Dot4)

CP9-15 & CP9-11 (Dot5)

CP9-

1 & CP9-

5 (Dot6)

CP9-18 & CP9-13 (Dot7)

CP9-

2 & CP9-

8 (Dot8)

CP9-16 & CP9-

9 (Dot9)

239X

CP8-10 & CP8-13 (Dot1)

CP8-

8 & CP8-

7 (Dot2)

CP8-12 & CP8-13 (Dot3)

CP8-

6 & CP8-

7 (Dot4)

CP8-14 & CP8-11 (Dot5)

CP8-

4 & CP8-

7 (Dot6)

CP8-16 & CP8-11 (Dot7)

CP8-

2 & CP8-

9 (Dot8)

CP8-18 & CP8-11 (Dot9)

CP8-

1 & CP8-

9 (Dot10)

CP8-17 & CP9-10 (Dot11)

CP8-

3 & CP8-

9 (Dot12)

CP8-15 & CP9-10 (Dot13)

CP8-

5 & CP9-

8 (Dot14)

CP9-16 & CP9-12 (Dot15)

CP9-

4 & CP9-

8 (Dot16)

CP9-17 & CP9-12 (Dot17)

CP9-

2 & CP9-

8 (Dot18)

CP9-15 & CP9-12 (Dot19)

CP9-

1 & CP9-

6 (Dot20)

CP9-13 & CP9-14 (Dot21)

CP9-

3 & CP9-

6 (Dot22)

CP9-11 & CP9-14 (Dot23)

CP9-

5 & CP9-

6 (Dot24)

If the problem is

not

missing or extra dots or

lines, do the following:

•

Make sure the printhead is securely

installed in the carrier.

•

Perform the Printhead-to-Platen Gap

adjustment.

FRU

Action