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HP LaserJet 6p/mp Service Manual - Page 183

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Index A AC bias 62 AC power See also power disconnecting 85 distribution 56 troubleshooting 116 accessories and supplies 23 accessories, ordering 145 acoustic emissions 18 agreements, maintenance 28 alcohol, cleaning with 51, 135 alignment, troubleshooting 132 alphabetical list, part numbers 167 ammonia-based cleaners, avoiding 51 amps, specifications 18 Asia-Pacific countries/regions toner cartridges 34 VCCI statement 180 assemblies locating 147 removing 70 replacing 22 Authorized Service Providers, HP 28 B back cover, removing 73 backgrounds, troubleshooting dark 131 scattered 129 Basic Hardware Training Course, ordering 22 battery backups 32, 123 BD failure, troubleshooting 132 Beam Detect signal 62 voltage 57 beam errors 124 bias, charging 62 bidirectional communications 58, 60 bins. See Paper Input Bin; Paper Output Bin Bi-Tronics interface 58 black pages, troubleshooting 129 black streaks, troubleshooting 127 blank pages, troubleshooting 129, 130 blank spots, troubleshooting 131 blinking indicator lights 38, 121 block diagram, functional 54 blurred areas, troubleshooting 126 buffer memory 60 buttons control panel 40 engine test 133 bypassing formatter 133 EN C cables control panel 114 DC Controller 156 parallel 21 part numbers 145 pins 141 power 21 canceling print jobs 45 capacity circuit 18 memory 14 paper 14 cards, memory incompatible 121 installing 72 cartridges. See toner cartridges character dropouts, troubleshooting 129 character voids, troubleshooting 128 charging rollers 57 charging, image formation system 62 checks. See tests circuitry AC power distribution 56 DC Controller loads 55 DC power distribution 57 overcurrent/overvoltage protection 57 specifications 18 cleaning connection points 135 printer 51 cleaning blade 62 clearing data 45 clips, grounding 94 clothing, washing toner off 52 Commercial Service and Support Organization-Americas (CSSO-A) 144 Commercial Service and Support Organization-Europe (CSSO-E) 144 communications 58, 60 complex pages errors 39 Page Protect 60 components DC Controller 119 internal 150 paper path 118 replacing 22 condensation specifications 32 conditioning, drum 62 configuration page, printing 43 connection points, cleaning 135 connectors DC Controller 113 J201 (DC Controller-to-Formatter) 66 parallel cable 21 power cable 21 troubleshooting 122 wiring 112 181

Section	Page
Contents	7
Figures	11
Tables	13
Product information	15
Chapter contents	15
Printer features	16
Identification	17
HP LaserJet 6L Gold	17
Model and serial	17
Specifications	20
Product overview	21
Service approach	24
Parts Exchange Program	24
Ordering parts	24
Ordering related documentation	24
Contacting HP to place an order	24
Technical assistance	25
HPCustomer Care	25
HP worldwide sales and service offices	27
Warranty	30
Hardware service during the warranty period	30
Hardware service after the warranty period	30
HP LaserJet Toner Cartridge warranty	31
Voltage conversions	31
Site requirements	33
Chapter contents	33
Site requirements	34
Operating environment	34
Printer space requirements	35
The HP C3906A/F Toner Cartridge	36
Storage conditions	36
Storing opened toner cartridges	36
Toner cartridge handling suggestions	37
Operating overview	39
Chapter contents	39
Using the Control Panel	40
Control Panel layout	40
Indicator lights	40
The Control Panel Button	42
Printing a self-test page	43
Continuous self test	46
Printing an engine test	46
Resetting the printer	47
To reset the printer	47
Printer maintenance	49
Chapter contents	49
Life expectancy of consumables	50
Toner cartridge life	51
Saving toner with EconoMode	51
Refilled toner cartridges	52
Recycling toner cartridges	52
Cleaning the printer	53
Cleaning printer components	53
Cleaning spilled toner	54
Functional overview	55
Chapter contents	55
Basic printer functions	56
DC Controller/power system	57
Print engine control system	58
Power system (on DC Controller PCA)	58
Formatter system	60
CPU	60
Read only memory (ROM)	60
Random access memory (RAM)	60
Parallel interface	60
Control Panel	60
Resolution Enhancement technology (REt)	61
EconoMode	61
Memory Enhancement technology (MEt)	61
Enhanced I/O	61
Page Protect	62
PJL overview	62
Image formation system	63
Toner cartridge	63
Step 1: Drum cleaning	64
Step 2: Drum conditioning	64
Step 3: Image writing	64
Step 4: Image developing	64
Step 5: Image transferring	64
Step 6: Image fusing	64
Paper feed system	65
Paper jam detection	67
Basic sequence of operation	68
Removal and replacement	71
Chapter contents	71
Removal and replacement strategy	72
Required tools	73
Installing memory cards (DRAM)	74
Covers and doors	75
Back Cover	75
EP Door Assembly	77
Memory Door	78
Main Cover and Paper Input Assembly	79
Internal assemblies	80
Control Panel	80
Exit Roller Assembly	81
Delivery Assembly	82
Fuser Pressure Plate	84
Heating Element	86
Pressure Roller	89
Face-Up/Face-Down Lever	90
Fuser Exit Roller Assembly	91
Paper Exit Sensor Flag	92
Top assemblies	93
Laser/Scanner Assembly	93
Solenoid	94
Pickup Roller Assembly	96
Paper Feed Frame	99
Transfer Roller Guide and Transfer Roller	103
Kick Plate	104
Separation Pad	106
Subpads	107
Feed Assembly	108
Bottom assemblies	111
Memory Door Guide	111
Motor	112
DC Controller	113
Formatter PCA	116
Troubleshooting	117
Chapter contents	117
General troubleshooting flowchart	118
Paper path and components	120
DC Controller diagram	121
Printer error troubleshooting	122
Priority of errors	122
Printer status messages	123
Service and error messages	125
Image formation troubleshooting	128
Check the toner cartridge	128
Image defect examples	129
Troubleshooting checks	135
Engine test	135
Half self-test functional check	136
Drum rotation functional check	136
High-voltage power supply check	137
Paper curl	139
Troubleshooting tools	140
Paper path check	140
Repetitive image defect ruler	141
Main wiring diagram	142
Parts and diagrams	145
Chapter contents	145
How to use the part lists and diagrams	146
Ordering parts	146
Ordering consumables	146
Accessories and supplies	147
Common hardware	148
Parts diagrams	149
Parts index	169
Alphabetical parts list	169
Numerical parts list	174
Regulatory information	179
Laser Safety (U.S.)	179
Laser Statement (Finland)	180
Toner safety	181
Ozone emission	181
FCC Statement (Class B)	182
VCCI Statement (Japan)	182

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181

Index

AC bias 62

AC power