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HP LaserJet 6p/mp Service Manual - Page 191

HP LaserJet 6L Pro 112, ROM/RAM errors 123

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troubleshooting beam errors 124 connectors 122 control panel 116 curled pages 130, 137 drum 126 engine errors 124 errors 120, 121 flags, sensor 122 flowchart 116 formatter errors 125 fuser errors 123 image defects 126, 127 incompatible memory cards 121 memory errors 121 motor 116 paper 137 paper curl 130, 137 paper jams 121 paper out errors 121 paper path 138 persistent errors 122 power 116 processor errors 125 repetitive defects 128, 139 ROM/RAM errors 123 scanner errors 125 self test 44, 117 sensors 122 service errors 123 SleepMode 122 status messages 121 toner cartridges 126 unclearable errors 122 trus head screws 146 typefaces. See fonts U unclearable errors, troubleshooting 122 uninterruptible power supplies (UPS) 32, 123 unplugging before servicing 70 upgrading memory 145 User's Guides, ordering 22 V vacuuming toner 52 VCCI statement 180 ventilation requirements 32 vertical lines, troubleshooting black 127 white 127, 128 VIDEO signals 58 voids, character 128 voltage AC power distribution 56 conversions, not supported 29 DC power distribution 57 electrical specifications 18 heating element, disconnecting 85 overvoltage protection 57 part numbers 144 W WAIT 66 waking printer 40 warranty post-warrant assistance 24 product 28 refilled toner cartridges 50 toner cartridges 29 waste toner, cleaning 62 watts, specifications 18 websites product information 23 weight printer 33 toner cartridge 33, 126 white areas, troubleshooting 128 white lines, troubleshooting horizontal 132 vertical 127, 128 white pages, troubleshooting 130 width, printer 33 wiring control panel 78 HP LaserJet 6L Pro 112 main diagram 140 worldwide customer care options 24 wrinkled pages, troubleshooting 130 writing stage 62 EN 189

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

Match case Limit results 1 per page

189

troubleshooting

beam errors 124

connectors 122

control panel 116

curled pages 130, 137

drum 126

engine errors 124

errors 120, 121

flags, sensor 122

flowchart 116

formatter errors 125

fuser errors 123

image defects 126, 127

incompatible memory cards 121

memory errors 121

motor 116

paper 137

paper curl 130, 137

paper jams 121

paper out errors 121

paper path 138

persistent errors 122

power 116

processor errors 125

repetitive defects 128, 139

ROM/RAM errors 123

scanner errors 125

self test 44, 117

sensors 122

service errors 123

SleepMode 122

status messages 121

toner cartridges 126

unclearable errors 122

trus head screws 146

typefaces.

See

fonts

unclearable errors, troubleshooting 122

uninterruptible power supplies (UPS) 32, 123

unplugging before servicing 70

upgrading memory 145

User’s Guides, ordering 22

vacuuming toner 52

VCCI statement 180

ventilation requirements 32

vertical lines, troubleshooting

black 127

white 127, 128

VIDEO signals 58

voids, character 128

voltage

AC power distribution 56

conversions, not supported 29

DC power distribution 57

electrical specifications 18

heating element, disconnecting 85

overvoltage protection 57

part numbers 144

WAIT 66

waking printer 40

warranty

post-warrant assistance 24

product 28

refilled toner cartridges 50

toner cartridges 29

waste toner, cleaning 62

watts, specifications 18

websites

product information 23

weight

printer 33

toner cartridge 33, 126

white areas, troubleshooting 128

white lines, troubleshooting

horizontal 132

vertical 127, 128

white pages, troubleshooting 130

width, printer 33

wiring

control panel 78

HP LaserJet 6L Pro 112

main diagram 140

worldwide

customer care options 24

wrinkled pages, troubleshooting 130

writing stage 62