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HP LaserJet 1200

Tags : HPLaserJet1200C7044-90906 
HP LaserJet 1200 Manuel de service

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Description

HP LaserJet 1200 Series Service Manual
Part number C7044-90906
First edition, April 2001

1 Product information
Chapter contents. 13
Introduction . 14
Hardware description 14
Firmware description 15
Product specifications16
Model and serial numbers19
Overview of printer . 20
Front and side view20
Back and side view21
Overview of optional copier/scanner 22
Top view 22
Warranty statement . 23
Extended warranty 24
Toner cartridge information 25
Refilled toner cartridges . 25
Recycling toner cartridges 25
2 Installation and operation
Chapter contents. 27
Operating environment 28
Identifying printer components 29
Printer control panel . 29
Control panel light patterns30
Copier/scanner control panel . 32
Selecting media33
Selecting media to print 33
Selecting media to copy or scan 34
Loading media. 35
Loading media to print . 35
Loading media to copy or scan 36
Printer output paths . 37
3 Maintenance
Chapter contents. 39
Life expectancies of consumables . 40
User-replaceable parts 40
Replacing the printer pickup roller 41
Replacing the printer separation pad 43
Replacing the copier/scanner separation pad . 45
Cleaning the equipment . 46
Cleaning the print path . 47
Cleaning the toner cartridge area . 48
Cleaning the printer pickup roller . 49
Cleaning the printer separation pad . 50
Cleaning and recalibrating the copier/scanner . 51
Cleaning the scanner path 51
4 Operational overview
Chapter contents. 53
Basic functions 54
Formatter system 55
Control panel 56
Draft mode 56
MEt 56
Enhanced I/O 56
PJL overview 57
Printer functions . 58
Engine control unit/power system. 59
Image formation system 64
Printer paper-feed system 67
Jam detection 69
Optional copier/scanner . 71
Optical system . 71
Document pickup and feed systems. 71
Basic sequence of operation (formatter-to-printer) 73
5 Removal and replacement
Chapter contents. 75
Removal and replacement strategy. 77
Required tools77
Before performing service. 78
Toner cartridge . 78
Parts removal order . 79
Covers . 80
Left side cover . 80
Optional copier/scanner 81
Back cover 82
Right side cover 84
Top cover . 87
Control panel assembly 88
Front cover assembly 89
Internal assemblies . 96
Transfer roller 96
Formatter . 97
Laser/scanner assembly 99
Fuser assembly . 101
Output rollers . 105
Motor107
Solenoid . 108
Fan assembly . 110
Right plate assembly . 112
Pickup assembly . 114
Pickup roller shaft 117
Paper lift plate assembly. 118
Left plate assembly . 119
Bottom assemblies 120
ECU pan . 120
Paper-feed assembly . 124
6 Troubleshooting
Chapter contents129
Basic troubleshooting 130
Errors. 132
Control panel light messages 132
Fatal error secondary messages 135
Checking the toner cartridge . 137
Solving image-quality problems . 138
Solving paper-feed problems 146
Solving print paper-feed problems . 146
Solving copying and scanning paper-feed problems . 148
Functional checks . 149
Engine test . 149
Half self-test functional check 150
Drum rotation functional check . 151
Heating element check . 152
High-voltage power supply check 153
Paper path check 155
Service mode functions. 156
NVRAM initialization/cold reset . 156
PJL software commands 156
Troubleshooting tools 159
Internal reports 159
Repetitive image defect ruler . 161
Main wiring . 162
Locations of connectors . 164
Locations of LEDs, jumpers, and switches . 165
7 Parts and diagrams
Chapter contents167
Ordering parts and supplies . 168
Parts 168
Related documentation and software . 168
Consumables . 168
Accessories 169
How to use the parts lists and diagrams 171
Common hardware 171
Assembly locations 172
Printer trays & optional copier/scanner . 172
Covers 174
Internal assemblies 176
Internal components (1 of 2)176
Internal components (2 of 2)178
Electrical components. 180
Paper pickup assembly (1 of 2) . 182
Paper pickup assembly (2 of 2) . 184
Fuser assembly . 186
Alphabetical parts list 188
Numerical parts list 191
Figures
Figure 1. Model and serial number labels 19
Figure 2. Front and side view . 20
Figure 3. Back and side view21
Figure 4. Top view 22
Figure 5. Dimensions of printer 28
Figure 6. Dimensions of printer with optional copier/scanner . 28
Figure 7. Printer control panel . 29
Figure 8. Light status legend 30
Figure 9. Copier/scanner control panel 32
Figure 10. Scanning a business card 36
Figure 11. Output bin. 37
Figure 12. Straight-through output door. 37
Figure 13. Basic configuration 54
Figure 14. Printer unit functional block diagram 58
Figure 15. ECU loads 60
Figure 16. Overview of laser/scanner operation 61
Figure 17. High-voltage power supply circuit. 63
Figure 18. Image formation block diagram 64
Figure 19. Printer path 68
Figure 20. Solenoid, photosensors, and switches . 70
Figure 21. Copier/scanner path 72
Figure 22. General timing diagram . 74
Figure 23. Removing the toner cartridge 78
Figure 24. Removing the left side cover 80
Figure 25. Removing the optional copier/scanner . 81
Figure 26. Removing the back cover (1 of 2). 82
Figure 27. Removing the back cover (2 of 2). 83
Figure 28. Removing the right side cover (1 of 3) . 84
Figure 29. Removing the right side cover (2 of 3) . 85
Figure 30. Removing the right side cover (3 of 3) . 86
Figure 31. Removing the top cover 87
Figure 32. Removing the control panel . 88
Figure 33. Removing the front cover (1 of 2) . 89
Figure 34. Removing the front cover (2 of 2) . 90
Figure 35. Removing the toner cartridge door (1 of 2)91
Figure 36. Removing the toner cartridge door (2 of 2)92
Figure 37. Removing the front guide assembly (1 of 3). 93
Figure 38. Removing the front guide assembly (2 of 3). 94
Figure 39. Removing the front guide assembly (3 of 3). 95
Figure 40. Removing the transfer roller . 96
Figure 41. Removing the formatter (1 of 2) 97
Figure 42. Removing the formatter (2 of 2) 98
Figure 43. Removing the laser/scanner (1 of 2) 99
Figure 44. Removing the laser/scanner (2 of 2) . 100
Figure 45. Removing the fuser assembly (1 of 4) 101
Figure 46. Removing the fuser assembly (2 of 4) 102
Figure 47. Removing the fuser assembly (3 of 4) 103
Figure 48. Removing the fuser assembly (4 of 4) 104
Figure 49. Removing the output rollers (1 of 2) 105
Figure 50. Removing the output rollers (2 of 2) 106
Figure 51. Removing the motor 107
Figure 52. Removing the solenoid (1 of 2)108
Figure 53. Removing the solenoid (2 of 2)109
Figure 54. Removing the fan (1 of 2) 110
Figure 55. Removing the fan (2 of 2) 111
Figure 56. Removing the right plate assembly (1 of 2) 112
Figure 57. Removing the right plate assembly (2 of 2) 113
Figure 58. Removing the pickup assembly (1 of 3) . 114
Figure 59. Removing the pickup assembly (2 of 3) . 115
Figure 60. Removing the pickup assembly (3 of 3) . 116
Figure 61. Removing the pickup roller shaft 117
Figure 62. Removing the paper lift plate assembly . 118
Figure 63. Removing the left plate assembly119
Figure 64. Removing the ECU pan (1 of 4) . 120
Figure 65. Removing the ECU pan (2 of 4) . 121
Figure 66. Removing the ECU pan (3 of 4) . 122
Figure 67. Removing the ECU pan (4 of 4) . 123
Figure 68. Removing the paper-feed assembly (1 of 4) . 124
Figure 69. Removing the paper-feed assembly (2 of 4) . 125
Figure 70. Removing the paper-feed mechanism (3 of 4) 126
Figure 71. Removing the paper-feed mechanism (4 of 4) 127
Figure 72. Control panel location. 132
Figure 73. Engine test switch149
Figure 74. Locating connectors for the heating element check 152
Figure 75. Toner cartridge high-voltage connection points (right side) 153
Figure 76. Toner cartridge high-voltage connection points (left side) . 153
Figure 77. High-voltage connector assembly (right side) 154
Figure 78. High-voltage connector assembly (left side)154
Figure 79. Overriding SW301 . 155
Figure 80. Self-test page . 160
Figure 81. Repetitive image defect ruler . 161
Figure 82. Main wiring (1 of 2) . 162
Figure 83. Main wiring (2 of 2) . 163
Figure 84. Locations of printer connectors . 164
Figure 85. Locations of copier/scanner connectors . 164
Figure 86. Locations of LEDs, jumpers, and switches. 165
Figure 87. Assembly locations. 172
Figure 88. Covers 174
Figure 89. Internal components (1 of 2)176
Figure 90. Internal components (2 of 2)178
Figure 91. Electrical components 180
Figure 92. Paper pickup assembly (1 of 2) . 182
Figure 93. Paper pickup assembly (2 of 2) . 184
Figure 94. Fuser assembly . 186



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