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HP 1300 Service Manual - Page 131

Removing the ECU 5 of 5,

UPC - 808736419819

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15 Remove five screws (callout 10). 16 Lift the ECU out of the ECU pan. 10 Figure 72. Removing the ECU (5 of 5) ENWW Bottom assemblies 131

Section	Page
Contents	3
Figures	7
Tables	11
Product information	13
Chapter contents	13
Introduction	14
Hardware description	14
Firmware description	15
Product specifications	16
Model and serial numbers	19
Overview of printer	20
Front and side view	20
Back and side view	21
Warranty statement	22
Extended warranty	23
Limited warranty for print cartridge life	24
Print cartridge information	24
Print cartridge date stamp	24
Refilled print cartridges	25
HP LaserJet printing supplies	25
HP printing supplies returns and recycling program information	25
Material safety data sheet	26
Installation and operation	27
Chapter contents	27
Operating environment	28
Identifying printer components	29
Printer control panel	29
Control panel light patterns	30
Selecting media	33
Loading media	35
Printer output paths	36
Maintenance	37
Chapter contents	37
Life expectancies of components	38
User-replaceable parts	38
Replacing the printer pickup roller	39
Replacing the printer separation pad	42
Cleaning the equipment	45
Cleaning the print path	46
Cleaning the print cartridge area	47
Cleaning the printer pickup roller	49
Cleaning the printer separation pad	50
Operational overview	53
Chapter contents	53
Basic functions	54
Formatter system	55
Control panel	56
EconoMode	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
Basic sequence of operation (formatter-to- printer)	71
Removal and replacement	73
Chapter contents	73
Removal and replacement strategy	75
Required tools	75
Before performing service	76
Print cartridge	76
Parts removal order	77
Differences between the printers	78
Locating the printer differences	78
Covers	81
Left side cover	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 (hp LaserJet 1300 series)	97
Formatter (hp LaserJet 1150 printer)	99
Laser/scanner assembly	101
Fuser assembly	103
Output rollers	107
E-label assembly (hp LaserJet 1300 only)	109
Motor	110
Solenoid	111
Fan assembly	113
Right plate assembly	115
Pickup assembly	118
Pickup roller shaft	121
Paper lift plate assembly	123
Left plate assembly	125
Bottom assemblies	127
ECU	127
Paper feed assembly	132
Paper-feed roller	133
Troubleshooting	139
Chapter contents	139
Basic troubleshooting	140
Errors	142
Control panel light messages	142
Fatal error secondary messages	145
Accessory error secondary messages	147
Checking the print cartridge	148
Solving image-quality problems	149
Solving paper-feed problems	154
Functional checks	156
Engine test	156
Half self-test functional check	157
Drum rotation functional check	158
Heating element check	159
High-voltage power supply check	160
Paper path check	162
Service mode functions	163
NVRAM initialization	163
Cold reset	164
PJL software commands	165
Troubleshooting tools	167
Internal reports	167
Repetitive image defect ruler	170
Main wiring	171
Locations of connectors	174
Locations of LEDs, jumpers, and switches	175
Parts and diagrams	177
Chapter contents	177
Ordering parts and supplies	178
Parts	178
Related documentation and software	178
Consumables	178
Accessories	179
How to use the parts lists and diagrams	183
Common hardware	183
Assembly locations	184
Covers	186
Internal assemblies	188
Internal components (1 of 2)	188
Internal components (2 of 2)	190
Left side plate assembly	192
Right side plate assembly	194
Electrical components	196
Paper pickup assembly	198
Paper feed guide assembly	200
Fuser assembly	202
Alphabetical parts list	204
Numerical parts list	208
Index	213
A	213
B	213
C	213
D	214
E	215
F	215
G	216
H	216
I	216
J	216
K	216
L	216
M	217
N	217
O	217
P	217
Q	219
R	219
S	220
T	220
U	221
V	221
W	221

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ENWW

Bottom assemblies

131

Remove five screws (callout 10).

Lift the ECU out of the ECU pan.

Figure 72.

Removing the ECU (5 of 5)