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HP P3005 Service Manual - Page 111

Remove seven screws callout 8 from the ECU pan, and remove the grounding screw callout 9.

UPC - 882780566361

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7. Remove seven screws (callout 8) from the ECU pan, and remove the grounding screw (callout 9). 8 9 Figure 5-26 Removing the ECU (6 of 8) ENWW Engine control unit (ECU) 93

Section	Page
Device information	19
Chapter contents	19
Device configurations	20
Features	21
Walkaround	23
Device parts	23
Interface ports	24
Control-panel layout	25
Device software	27
Minimum system requirements	27
Supported operating systems	27
Supported printer drivers	28
Software for Windows computers	28
HP Web Jetadmin	28
HP Easy Printer Care software	28
Supported operating systems	28
Supported browsers	29
Software for Macintosh computers	29
Other software	29
Embedded Web server	29
Uninstall software	30
Remove software from Windows operating systems	30
Remove software from Macintosh operating systems	30
Media specifications	31
Select print media	31
Supported media sizes	32
Supported media types	33
Paper to avoid	34
Installation and configuration	35
Chapter contents	35
Site preparation	36
Location specifications	36
Operating environment	36
Load input trays	37
Load tray 1 (multipurpose tray)	37
Load tray 2 and optional tray 3	39
Install supplies	41
Supply replacement guidelines	41
Change the print cartridge	41
Install accessories	44
Install memory	44
Install device memory	44
Check DIMM installation	47
Enable memory for Windows	48
Use HP Jetdirect print server cards	48
Install an HP Jetdirect print server card	48
Remove an HP Jetdirect print server card	49
Maintenance	51
Chapter contents	51
Manage supplies	52
Supplies life	52
Approximate print-cartridge replacement intervals	52
Manage the print cartridge	52
Print-cartridge storage	52
Use genuine HP print cartridges	52
HP policy on non-HP print cartridges	52
Print-cartridge authentication	53
HP fraud hotline and Web site	53
Clean the device	54
Clean the exterior	54
Clean the paper path	54
Clean spilled toner	54
Clean the fuser	54
Management tools	56
Use information pages	56
Use the HP Easy Printer Care software	57
Open the HP Easy Printer Care software	57
HP Easy Printer Care software sections	58
Use the embedded Web server	59
Open the embedded Web server by using a network connection	59
Embedded Web server sections	59
Use HP Web Jetadmin software	61
Use the HP Printer Utility for Macintosh	61
Open the HP Printer Utility	62
HP Printer Utility features	62
Theory of operation	63
Chapter contents	63
Basic operation	64
Formatter	64
Engine control unit (ECU)	65
Pickup/feed/delivery system	68
Laser/scanner system	69
Image-formation system	70
Step 1: Primary charging	71
Step 2: Laser beam exposure	71
Step 3: Developing	71
Step 4: Transfer	72
Step 5: Separation	72
Step 6: Fusing	72
Step 7: Drum cleaning	73
Internal components	74
Timing	76
Print cartridge memory system	79
Removal and replacement	81
Chapter contents	81
Overview	83
Removal and replacement strategy	83
Electrostatic discharge	83
Required tools	83
Types of screws	84
Service approach	85
Before performing service	85
Pre-service procedures	85
Parts removal order	86
After performing service	86
Covers	87
Right-side cover	87
Left-side cover	88
Back cover	90
I/O cover	90
Top, right cover	91
Top cover	92
Front, right cover	93
Control panel	96
Formatter	98
Fuser	101
Laser/scanner	104
Engine control unit (ECU)	106
Access plate	114
High-voltage power supply	115
Paper feed guide assembly	122
Main motor	124
Gear assembly	126
Reinstallation notes for the gear assembly	128
Tray 1 solenoid	129
Tray 2 solenoid	130
E-label reader (memory tag)	131
Face-down-roller shaft	133
Cartridge door	135
Transfer roller	138
Registration assembly	139
Tray 1 pickup roller	142
Tray 2 pickup roller	143
Separation pad	145
Troubleshooting	147
Chapter contents	147
Troubleshooting process	148
Basic troubleshooting	148
Control-panel messages	149
Control-panel message types	149
Resolve control-panel messages	149
Clear jams	166
Avoid jams	166
Typical jam locations	167
Jam detection	168
Clear jams from the input-tray areas	169
Clear jams from the print-cartridge area	171
Clear jams from the output-bin areas	172
Clear jams from the optional duplexer	173
Interface troubleshooting	175
Communications checks	175
Computer direct connect (parallel) test	175
EIO troubleshooting	175
Jetdirect page	176
Network printing problems	176
Service mode functions	178
Cold reset	178
NVRAM initialization	178
Hard-disk initialization	179
Skip disk-load	179
Self test	179
Service menu (service PIN codes)	179
Service ID	180
Restoring the service ID	180
Convert the service ID to an actual date	181
Troubleshooting tools	182
Control-panel menus	182
Diagnostics menu	182
Test pages	183
Engine-test page	183
Formatter test page	184
Image defect ruler	185
Upgrade the firmware	186
Determine the current firmware version	186
Download the new firmware from the HP Web site	186
Transfer the new firmware to the device	186
Use FTP to upgrade the firmware on a network connection	186
Use HP Web Jetadmin to upgrade the firmware	187
Use MS-DOS commands to upgrade the firmware	188
Upgrade the HP Jetdirect firmware	189
Troubleshoot general printing problems	190
Troubleshoot media handling problems	193
Multiple pages feed	193
Pages are wrinkled or folded	193
Pages are skewed	193
Troubleshoot print-quality problems	195
Print-quality checklist	195
Image-defect examples	196
Light print (partial page)	197
Light print (entire page)	198
Specks	198
Dropouts	199
Lines	199
Gray background	200
Toner smear	200
Loose toner	201
Repeating defects	201
Repeating image	202
Misformed characters	202
Page skew	203
Curl or wave	203
Wrinkles or creases	204
Vertical white lines	204
Tire tracks	205
White spots on black	205
Scattered lines	206
Blurred print	206
Random image repetition	207
Diagrams	208
Device component locations	208
Main assemblies	208
Main parts	209
Sensors and switches	210
Motors, fans, and solenoids	211
PCAs	212
Wiring diagrams	212
Parts and diagrams	217
Chapter contents	217
Order parts, accessories, and supplies	218
Order directly from HP	218
Order through service or support providers	218
Order directly through the embedded Web server (for printers that are connected to a network)	218
Order directly through the HP Easy Printer Care software	218
Part numbers	219
Paper-handling accessories	219
Print cartridge	219
Memory	219
Cables and interfaces	220
Covers	222
Internal components	224
Tray 2 pickup assembly	240
Alphabetical parts list	242
Numerical parts list	251
Specifications	261
Physical specifications	262
Electrical specifications	263
Acoustic specifications	264
Operating environment	264
Service and support	265
Hewlett-Packard limited warranty statement	265
Customer self repair warranty service	266
Print cartridge limited warranty statement	267
HP Customer Care	268
Online Services	268
Telephone support	268
Software utilities, drivers, and electronic information	268
HP direct ordering for accessories or supplies	268
HP service information	268
HP service agreements	268
HP Easy Printer Care software	269
HP support and information for Macintosh computers	269
HP maintenance agreements	270
On-site service agreements	270
Next-day on-site service	270
Weekly (volume) on-site service	270
Repacking the device	270
Extended warranty	271
Regulatory information	273
FCC regulations	274
Environmental product stewardship program	275
Protecting the environment	275
Ozone production	275
Power consumption	275
Toner consumption	275
Paper use	275
Plastics	275
HP LaserJet print supplies	275
HP print supplies returns and recycling program information	276
Paper	276
Material restrictions	276
Disposal of waste equipment by users in private households in the European Union	277
Material Safety Data Sheet (MSDS)	277
For more information	277
Declaration of conformity	279
Safety statements	280
Laser safety	280
Canadian DOC regulations	280
VCCI statement (Japan)	280
Power cord statement (Japan)	280
EMI statement (Korea)	280
Laser statement for Finland	281

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Remove seven screws (callout 8) from the ECU pan, and remove the grounding screw (callout 9).

Figure 5-26

Removing the ECU (6 of 8)

ENWW

Engine control unit (ECU)