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HP 1200 Service Manual - Page 103

Fuser assembly, If you need to realign the 69T gear, you must first remove the pressure

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Note Fuser assembly 1 Remove the left side, back, right side, and top covers (see pages 80 through 87). 2 Remove two screws (callout 1) from the right fuser plate. 3 Remove a third screw (callout 2) from behind the large gear on the right fuser plate. You can access the third screw through the holes in the 69Tgear. If you need to realign the 69T gear, you must first remove the pressure roller gear. Release the tab (callout 3) and remove the pressure roller gear from the printer. 4 Remove the bracket. 21 2 23 Figure 45. Removing the fuser assembly (1 of 4) EN Internal assemblies 101

Section	Page
Contents	5
Figures	9
Tables	13
Product information	15
Chapter contents	15
Introduction	16
Hardware description	16
Firmware description	17
Product specifications	18
Model and serial numbers	21
Overview of printer	22
Front and side view	22
Back and side view	23
Overview of optional copier/scanner	24
Top view	24
Warranty statement	25
Extended warranty	26
Toner cartridge information	27
Refilled toner cartridges	27
Recycling toner cartridges	27
Installation and operation	29
Chapter contents	29
Operating environment	30
Identifying printer components	31
Printer control panel	31
Control panel light patterns	32
Copier/scanner control panel	34
Selecting media	35
Selecting media to print	35
Selecting media to copy or scan	36
Loading media	37
Loading media to print	37
Loading media to copy or scan	38
Printer output paths	39
Maintenance	41
Chapter contents	41
Life expectancies of consumables	42
User-replaceable parts	42
Replacing the printer pickup roller	43
Replacing the printer separation pad	45
Replacing the copier/ scanner separation pad	47
Cleaning the equipment	48
Cleaning the print path	49
Cleaning the toner cartridge area	50
Cleaning the printer pickup roller	51
Cleaning the printer separation pad	52
Cleaning and recalibrating the copier/scanner	53
Cleaning the scanner path	53
Operational overview	55
Chapter contents	55
Basic functions	56
Formatter system	57
Control panel	58
Draft mode	58
MEt	58
Enhanced I/O	58
PJL overview	59
Printer functions	60
Engine control unit/power system	61
Image formation system	66
Printer paper-feed system	69
Jam detection	71
Optional copier/scanner	73
Optical system	73
Document pickup and feed systems	73
Basic sequence of operation (formatter-to- printer)	75
Removal and replacement	77
Chapter contents	77
Removal and replacement strategy	79
Required tools	79
Before performing service	80
Toner cartridge	80
Parts removal order	81
Covers	82
Left side cover	82
Optional copier/scanner	83
Back cover	84
Right side cover	86
Top cover	89
Control panel assembly	90
Front cover assembly	91
Internal assemblies	98
Transfer roller	98
Formatter	99
Laser/scanner assembly	101
Fuser assembly	103
Output rollers	107
Motor	109
Solenoid	110
Fan assembly	112
Right plate assembly	114
Pickup assembly	116
Pickup roller shaft	119
Paper lift plate assembly	120
Left plate assembly	121
Bottom assemblies	122
ECU pan	122
Paper-feed assembly	126
Troubleshooting	131
Chapter contents	131
Basic troubleshooting	132
Errors	134
Control panel light messages	134
Fatal error secondary messages	137
Checking the toner cartridge	139
Solving image-quality problems	140
Solving paper-feed problems	148
Solving print paper-feed problems	148
Solving copying and scanning paper-feed problems	150
Functional checks	151
Engine test	151
Half self-test functional check	152
Drum rotation functional check	153
Heating element check	154
High-voltage power supply check	155
Paper path check	157
Service mode functions	158
NVRAM initialization/cold reset	158
PJL software commands	158
Troubleshooting tools	161
Internal reports	161
Repetitive image defect ruler	163
Main wiring	164
Locations of connectors	166
Locations of LEDs, jumpers, and switches	167
Parts and diagrams	169
Chapter contents	169
Ordering parts and supplies	170
Parts	170
Related documentation and software	170
Consumables	170
Accessories	171
How to use the parts lists and diagrams	173
Common hardware	173
Assembly locations	174
Printer trays & optional copier/scanner	174
Covers	176
Internal assemblies	178
Internal components (1 of 2)	178
Internal components (2 of 2)	180
Electrical components	182
Paper pickup assembly (1 of 2)	184
Paper pickup assembly (2 of 2)	186
Fuser assembly	188
Alphabetical parts list	190
Numerical parts list	193
Index	197
Numerics	197
A	197
B	197
C	197
D	198
E	199
F	199
G	200
H	200
I	200
J	201
K	201
L	201
M	201
N	202
O	202
P	202
Q	204
R	204
S	204
T	205
U	206
V	206
W	206
Y	206