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HP LaserJet 3300 Service Manual - Page 195

Large, amounts of, toner are, scattered, around the, characters., Vertical white, stripes, appear.

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Table 18. Solving print image-quality problems (continued) Problem Large amounts of toner are scattered around the characters. Cause The media resistivity is too high. Solution 1. Use a different media. Make sure that the media meets specifications detailed in the Print Media Guide for the HP LaserJet family. 2. Turn the stack of media over and put it back in the tray. 3. Use media that is designed for laser printers. Vertical white stripes appear. The media you are using does not meet HP's specifications (for example, it is too moist or too rough). The toner is low. Make sure that the media meets specifications detailed in the Print Media Guide for the HP LaserJet family. Gently shake the print cartridge back and forth to redistribute the toner. EN Errors 193

Section	Page
Contents	5
Figures	11
Tables	15
Product information	17
Chapter contents	17
Introduction	18
Overview of product	18
Front and side view	18
Back and side view	19
Hardware description	20
Firmware description	21
Product Specifications	21
Model and serial numbers	24
Warranty statement	25
Extended warranty	26
Print cartridge information	27
Refilled print cartridges	27
Recycling print cartridges	27
FCC Part 68 Requirements (US)	28
Telephone Consumer Protection Act (US)	29
IC CS-03 requirements	29
Regulatory information for EU countries	30
Operation	31
Chapter contents	31
Operating environment	32
Identifying the control panel components	33
Fax controls	33
To send a fax to one recipient	33
To receive faxes when you hear fax tones	34
Alphanumeric buttons	35
Menu and cancel controls	36
Copy, scan, and start controls	36
Control panel menu structure	37
To print the control panel menu structure	37
To use the control panel keys	37
Control panel error messages	40
Product media specifications	47
Supported media sizes (printer)	47
Guidelines for using media	48
Paper and Transparencies	48
Common media problems table	48
Labels	49
Envelopes	49
Card stock and heavy media	50
Loading media	51
Loading media to print	51
Selecting originals for the ADF	52
Media information for the flatbed	53
Loading originals to copy or scan	53
To load originals onto the flatbed scanner	53
To load originals into the ADF input tray	54
Printer output paths	56
Maintenance	57
Chapter contents	57
Life expectancies of parts that wear	58
Scanner calibration	58
Cleaning the product	59
Cleaning the exterior	59
Cleaning the glass	59
Cleaning the lid backing	60
Cleaning the print path	61
Cleaning the print cartridge area	62
Cleaning the printer pickup roller	63
Cleaning the printer separation pad	64
User-replaceable parts	65
Replacing the printer pickup roller	65
Replacing the printer separation pad	67
Installing a new ADF	69
To install a new or replacement ADF	69
Changing an ADF pick roller assembly	71
Removing and replacing the control panel bezel	73
Operational overview	75
Chapter contents	75
Basic functions	76
Formatter system	78
Central processing unit	78
Line Interface Unit (LIU)	78
Scanner formatter PCA	78
Flash memory or ROM	79
Standard Boot Process	79
RAM	80
Parallel interface or Universal Serial Bus interface	80
Control panel	80
Draft mode	80
MEt	80
Enhanced I/O	81
PJL overview	81
Scanner and ADF functions and operation	82
Scanner Functions	82
Scanner Operation	83
ADF Operation	83
ADF paper path and ADF sensors	84
ADF Jam Detection	85
Printer functions and operation	86
Engine control unit/power system	87
Image formation system	93
Printer paper-feed system	96
Jam detection	98
Basic sequence of operation (formatter-to- printer)	100
LIU (fax) functions and operation	102
PSTN operation	102
The fax subsystem	102
Formatter in the fax subsystem	103
LIU in the fax subsystem	103
Fax page storage in flash memory	107
Removal and replacement	109
Chapter contents	109
Removal and replacement strategy	111
Required tools	111
Before performing service	112
Print cartridge	112
Parts removal order	113
Separation of scanner from printer	115
Right side cover	115
Scanner side covers	117
Scanner assemblies	121
Flat lid or ADF assembly	121
The ADF pick roller assembly	122
ADF document feed guide	124
ADF separation pad	125
Control panel bezel	126
Control panel	127
Control panel chassis	128
Scanner formatter	129
ADF scanner glass	130
Printer covers	131
Left side door	131
Back cover	132
Printer top cover	134
Front cover assembly	135
Printer assemblies	139
Transfer roller	142
Line Interface Unit (LIU)	143
Formatter	144
Fuser assembly	146
Output rollers	150
Motor	152
Solenoid	153
Fan assembly	155
Pickup assembly	157
Paper lift-plate assembly and pickup roller shaft	159
Right plate assembly	162
Left plate assembly	164
Bottom assemblies	165
Left bottom frame support	165
ECU fuses and ECU pan	166
Paper-feed assembly	170
Troubleshooting	175
Chapter contents	175
Basic troubleshooting	176
Errors	180
Control panel messages	180
Critical error messages	187
Checking the print cartridge	189
Solving image-quality problems	190
Solving paper-feed problems	199
Solving print paper-feed problems	199
Solving scanner (copier) paper-feed problems	201
Functional checks	202
Engine test	202
Half self-test functional check	203
Drum rotation functional check	204
Heating element check	205
High-voltage power supply check	206
Paper path check	208
Updating or recovering the firmware code	209
Firmware update via flash executable	209
Firmware recovery DIMM	209
Troubleshooting tools	211
Internal reports	211
Printing all fax reports at once	211
T.30 protocol trace	212
Service mode functions	231
Secondary service menu	231
Developer’s menu	232
NVRAM init	235
PJL software commands	235
Repetitive image defect ruler	238
Main wiring	239
Locations of connectors	241
Locations of connectors and switches	242
Parts and diagrams	243
Chapter contents	243
Ordering parts and supplies	244
Parts	244
Related documentation and software	244
Parts that wear	244
Accessories	245
Common hardware	246
How to use the parts lists and diagrams	247
Scanner assemblies	248
Scanner and ADF	248
ADF rollers and separation pad	250
Control panel assembly	251
Printer assemblies	254
Printer covers	254
Paper tray	255
Internal assemblies	256
Internal components (1 of 2)	256
Internal components (2 of 2)	258
Electrical components	260
Paper pickup assembly (1 of 2)	262
Paper pickup assembly (2 of 2)	264
Fuser assembly	266
Alphabetical parts list	268
Numerical parts list	273
Index	279
Numerics	279
A	279
B	279
C	279
D	281
E	281
F	281
G	282
H	282
I	283
J	283
K	283
L	283
M	283
N	284
O	284
P	284
Q	286
R	286
S	287
T	288
U	288
V	288
W	289