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HP 2600n Service Manual - Page 61

Transfer belt (ETB),

UPC - 829160809366

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Figure 4-7 Print cartridge structure Transfer belt (ETB) The ETB unit feeds paper as well as transfers toner onto the paper. The ETB unit consists of the ETB, ETB feed roller, ETB driven roller, and color misregistration/ density sensor unit. As the main motor rotates the ETB feed roller, the ETB feed roller rotates the ETB belt. The transfer roller and the ETB driven roller are engaged with the ETB. During printing, the picked up paper is conveyed in between the ETB and the photosensitive drum, and simultaneously the toner image is transferred onto the paper. The ETB is also used for color misregistration corrective control and the image stabilization control. The pattern image for the color misregistration or image density determination is transferred onto the belt. This pattern image is read in the color misregistration/density sensor unit. The following is the diagrammatic sketch of the ETB unit. ENWW Image formation system 47

Section	Page
Product information	15
Quick access to printer information	16
Printer configuration	17
Printer features	18
Walk around	20
Front view (shown with optional Tray 3)	20
Back and side view	21
Control panel	22
Understanding supplies status	22
Understanding printer status	22
Understanding control panel layout	23
Software	25
Supported drivers	25
Software and supported operating systems	25
Software for Windows	25
Software for Macintosh	26
Network software	26
Uninstalling software	26
Windows software	26
Macintosh software	27
Print-media specifications	28
General guidelines	28
Paper and print media	28
Printing and storage environment	28
Envelopes	29
Labels	31
Transparencies	31
Media support tables	31
Supported print media for Tray 1, Tray 2, and optional Tray 3	31
Unsupported media (media to avoid)	32
Installation	35
Site preparation	36
Operating environment	36
Minimum system requirements	37
Requirements for PC systems	37
Requirements for Macintosh systems (non-PostScript)	37
Package contents	38
Install input devices	39
Installing optional Tray 3	39
Loading Tray 1	39
Installing supplies	41
Print cartridges	41
Managing and maintenance	45
Managing supplies	46
Life expectancies of supplies	46
Checking and ordering supplies	46
To check status using the control panel	46
To check and order supplies using HP Toolbox	46
Storing supplies	47
Replacing and recycling supplies	47
Replacing the print cartridges	47
HP policy on non-HP supplies	47
HP anti-counterfeit website	47
Cleaning the printer	48
To clean the printer at the printer	48
To clean the fuser using HP Toolbox	49
Cleaning spilled toner	49
Calibrating the printer	50
To calibrate the printer at the printer	50
To calibrate the printer from the HP Toolbox	50
Operational theory	51
Engine control system	52
Basic sequence of operation	52
Power-on sequence	53
Motors and fans	53
Main motor failure detection	54
Fan motor failure detection	54
Image formation system	55
Image formation process	57
Latent image formation	58
Laser/scanner system	59
Developing stage	59
Print cartridge	60
Transfer belt (ETB)	61
Transfer stage	62
Separation stage	63
Fusing stage	63
Pickup and feed system	65
Manual feed slot pickup mechanism	67
Paper feed mechanism	67
Skew correction by the registration shutter	67
Jam detection	68
Solenoid, motor, and fan locations	69
Printed circuit assembly locations	69
250-sheet tray solenoid and printed circuit locations	70
Service-only tools (SERVICE ONLY)	72
General timing chart	72
Printer calibration	73
Removal and replacement	75
Overview	76
Service approach	77
Pre-service procedures	77
Removal and replacement procedures	78
Print cartridge replacement	78
ETB removal and replacement	80
Fuser removal and replacement	88
Formatter removal and replacement	96
DC controller removal and replacement	100
Separation pad removal and replacement	102
Paper pickup roller removal and replacement	103
Control panel removal and replacement	105
Troubleshooting	111
Troubleshooting process	112
Troubleshooting checklist	112
Clearing jams	113
Paper path	113
Common causes of paper jams	114
Where to look for jams	115
Jams inside the printer	116
Input jams	117
Tray 1	117
Tray 2	118
Output jams	118
Jams in the top bin	118
Pickup delay jam	119
Pickup stationary jam	119
Delivery delay jam	119
Wrapping jam	119
Delivery stationary jam	119
Start-up residual paper jam	119
Door open jam	120
Print problems	121
Getting information	121
Control panel messages	121
Alert and warning messages	121
Critical error messages	122
Supplies messages	123
Status messages	126
Status log only messages	126
Reports menu	127
Configuration page	128
Supplies Status page	130
Status log	130
Service menu settings	132
Secondary service menu	132
Printed image quality problems	133
Improving print quality	133
Paper Types menu	133
Print Modes menu	134
Print quality menu	135
Understanding print-quality settings	135
To temporarily change print-quality settings	136
To change print-quality settings for all future jobs	136
Identifying and correcting printed image defects	136
Print-quality checklist	136
Paper handling issues	137
Wrong size/type media	137
Cannot select a tray or feature to use	137
Performance problems	137
Functional tests (SERVICE ONLY)	139
Engine test print	139
Service mode functions (SERVICE ONLY)	140
Cold reset	140
NVRAM initializer	140
Super NVRAM initializer	140
Restoring page counts and serial number	141
Cleaning the ETB	141
Troubleshooting tools	142
Printer pages and reports	142
Demo page	142
Configuration page	143
Event log	145
Supplies Status page	145
Fuser cleaning page	146
Print quality troubleshooting pages	146
Control panel messages (error codes)	146
Alert and warning messages	146
Critical error messages	147
Supplies messages	148
Status messages	151
Status log only messages	151
Service menu	151
Restoring the factory-set defaults	152
To restore the factory-set defaults	152
General print quality issues	152
Solving issues with color documents	156
HP Toolbox	158
HP Toolbox	158
To view HP Toolbox	158
Troubleshooting tab	158
Print quality troubleshooting pages	158
Printer calibration	158
Cleaning page	158
Configuration page	159
Diagnostic resources	160
Reports menu	160
Network/Web diagnostics tools	160
Repetitive image defect ruler	161
Firmware and software updates	162
Parts and diagrams	163
Overview	164
Assembly locations	168
Covers	174
Internal assemblies	176
Input devices	200
Diagrams	222
Alphabetical parts list	223
Numerical parts list	244
Product specifications	265
Physical specifications	266
Supplies specifications	267
Print cartridge life	267
Electrical specifications	268
Environmental specifications	269
Acoustical specifications	270
Product warranty statements	271
Hewlett-Packard limited warranty statement	272
Print Cartridge Limited Warranty Statement	273
Regulatory statements	275
Declaration of Conformity	276
Laser safety statement	277
Canadian DOC statement	278
VCCI statement (Japan)	279
Korean EMI statement	280
Finnish laser statement	281

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Figure 4-7

Print cartridge structure

Transfer belt (ETB)

The ETB unit feeds paper as well as transfers toner onto the paper.

The ETB unit consists of the ETB, ETB feed roller, ETB driven roller, and color misregistration/

density sensor unit.

As the main motor rotates the ETB feed roller, the ETB feed roller rotates the ETB belt. The transfer

roller and the ETB driven roller are engaged with the ETB.

During printing, the picked up paper is conveyed in between the ETB and the photosensitive drum,

and simultaneously the toner image is transferred onto the paper. The ETB is also used for color

misregistration corrective control and the image stabilization control. The pattern image for the color

misregistration or image density determination is transferred onto the belt. This pattern image is read

in the color misregistration/density sensor unit.

The following is the diagrammatic sketch of the ETB unit.

ENWW

Image formation system