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HP
All in One Printer
LaserJet M4345 MFP
Service Manual
Page 227 (Rear-side fans)
HP LaserJet M4345 MFP - Rear-side fans; Rear-side motors (1 of 2)
653 pages
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Rear-side fans
Figure 4-78
Rear-side fans
1
FN102, print-cartridge fan
2
FN104, DC controller fan
Rear-side motors (1 of 2)
Figure 4-79
Rear-side motors (1 of 2)
1
FN102, print-cartridge fan
210
Chapter 4 Theory of operation
ENWW
226
228
Table of Contents
Main Page
Product information
18
Device comparison
19
Features comparison
20
Walkaround
23
Accessories and supplies
24
Interface ports
25
Locking and unlocking optional accessories
25
Media specifications
27
Select print media
27
General media specifications
31
Media considerations
31
Envelopes
31
Envelopes with double side seams
32
Envelopes with adhesive strips or flaps
33
Envelope margins
33
Envelope storage
33
Labels
33
Label construction
33
Transparencies
33
Card stock and heavy media
34
Card stock construction
34
Card stock guidelines
34
Letterhead and preprinted forms
34
Select the correct fuser mode
35
Installation
38
Site preparation
39
Operating environment
39
Installation checklist
41
Optional output and input devices
43
Connect to a computer or network
44
USB configuration
44
Network connection
45
Fax connection
45
Analog faxing
45
Connecting the fax accessory to a phone line
45
Configuring and using the fax features
46
Digital faxing
46
Device software
47
Supported operating systems
47
Supported operating systems
48
Select the correct printer driver
49
Universal printer drivers
49
Driver Autoconfiguration
49
Update Now
50
HP Driver Preconfiguration
50
Priority for print settings
50
Open the printer drivers
51
Software for Macintosh computers
52
Remove software from Macintosh operating systems
52
Utilities
53
HP Web Jetadmin
53
Embedded Web server
53
HP Easy Printer Care software
54
Supported operating systems
54
Supported browsers
54
Other components and utilities
54
Network configuration
55
Configure TCP/IPv4 parameters
55
Change the IP address
55
Set the subnet mask
56
Set the default gateway
56
Configure TCP/IPv6 parameters
57
Disable network protocols (optional)
57
Disable IPX/SPX
57
Disable AppleTalk
58
Disable DLC/LLC
58
HP Jetdirect EIO print servers
58
Security features
59
Securing the embedded Web server
59
Foreign Interface Harness (FIH)
59
Requirements
59
Using the FIH
59
Secure Disk Erase
60
Data affected
61
Gaining access to Secure Disk Erase
61
Additional Information
61
Job-storage features
61
HP DSS authentication
61
Locking the control‑panel menus
61
Locking the formatter cage
62
Manage and maintain the device
64
Control-panel menus
65
Use the control panel
65
Control-panel layout
65
Home screen
66
Buttons on the touchscreen
67
Control-panel help system
67
Navigate the Administration menu
67
Information menu
68
Default Job Options menu
69
Default Options for Originals
70
Default Copy Options
71
Default Fax Options
72
Default E-mail Options
73
Default Send to Folder Options
74
Default Print Options
75
Time/Scheduling menu
75
Management menu
76
Initial Setup menu
77
Networking and I/O
77
Fax Setup
85
E-mail Setup
88
Send Setup menu
88
Device Behavior menu
88
Print Quality menu
92
Troubleshooting menu
94
Resets menu
96
Service menu
97
Use information pages
99
Configure e-mail alerts
101
HP Easy Printer Care software
102
Open the HP Toolbox FX
102
HP Toolbox FX sections
102
Use the embedded Web server
104
Open the embedded Web server by using a network connection
104
Embedded Web server sections
104
Use HP Web Jetadmin software
107
Use the HP Printer Utility for Macintosh
108
Open the HP Printer Utility
108
HP Printer Utility features
108
Manage supplies
110
Supplies life expectancy
110
Change the print cartridge
110
Manage the print cartridge
110
Print-cartridge storage
110
Use genuine HP print cartridges
110
HP policy on non-HP print cartridges
111
Print-cartridge authentication
111
HP fraud hotline and Web site
111
Clean the device
112
Clean the exterior
112
Clean the scanner glass
112
Clean the scanner lid backing
113
Clean the paper path
113
Clean the document feeder
113
Clean the document feeder delivery system
114
Clean the document feeder-rollers
115
Set the real-time clock
117
Set the date and time
117
Set the date format
117
Set the date
117
Set the time format
117
Set the time
117
Set the wake time
118
Set the sleep delay
118
Upgrading the firmware
119
Determining the current level of firmware
119
Downloading the new firmware from the HP Web site
119
Transferring the new firmware to the MFP
119
Using FTP to upgrade the firmware on a network connection
119
Using HP Web Jetadmin to upgrade the firmware
121
Using MS-DOS commands to upgrade the firmware
121
Upgrading the HP Jetdirect firmware
122
Calibrate the scanner
123
Calibrate the control panel
124
Disable Embedded Jetdirect I/O
125
Select the MFP language
126
Theory of operation
128
Basic operation
129
Sequence of operation (printer)
129
Sequence of operation (scanner)
130
Formatter system
131
Sleep mode
131
Resolution Enhancement technology (REt)
131
EconoMode
132
Input/output
132
CPU
132
Memory
132
Hard disk
132
Random-access memory
132
DIMM slot
132
Firmware
132
Nonvolatile memory
133
HP Memory Enhancement technology
133
PJL overview
133
PML
133
Control panel
133
Scanner interface
133
Engine-control system
134
DC controller PCA
134
Motors and fans
136
Motor and fan functions
136
Ambient-temperature detection
137
Engine power supply circuit
137
Fuser control
138
Fuser over-temperature protection
139
High-voltage power supply
141
Low-voltage power supply
142
Overcurrent/overvoltage protection
144
Toner detection
144
Cartridge detection
144
Laser/scanner system
145
Laser/scanner control
146
Image-formation system
148
Print cartridge
149
Cartridge memory
149
Image-formation process
150
Pickup, feed, and delivery system
152
Pickup-and-feed block
155
Printing from tray 1
156
Printing from tray 2
157
Media-size detection
158
Cassette media-size detection
158
Media-length detection
158
Media-width detection
158
Cassette pickup operation
158
Lifter-driver operation
160
Multifeed prevention
160
Distance-between-pages adjustment
161
Media-skew prevention
162
Feed-speed control
164
Fusing and reversing/delivery block
165
Fusing
165
Face-down delivery
165
Face-up delivery
166
Jam detection
168
Pickup delay jam from tray 1
168
Pickup delay jam from tray 2
168
Pickup stationary jam
168
Fuser-delivery delay jam
169
Fuser wrapping jam
169
Fuser-delivery stationary jam when feeding regular-size media
169
Fuser-delivery stationary jam when feeding custom-size media
169
Reversing delay jam (face-down delivery only)
169
Reversing stationary jam (face-down delivery only)
169
Delivery delay jam during face-down delivery
170
Delivery delay jam during face-up delivery
170
Delivery stationary jam during face-down delivery
170
Delivery stationary jam during face-up delivery
170
Door-open jam
170
Residual-media jam
170
Printing from the 500-sheet feeder
171
500-sheet feeder pickup and feeding
172
Duplex-printing unit
174
Reversing/duplexing pickup
174
Duplex-printing jam detection
175
Duplex-unit-pickup delay jam
175
Duplex-unit stationary jam
176
Duplex-unit delay jam
176
3-bin mailbox system
177
Stacker mode
179
Mailbox mode
179
Function-separator mode
179
Jam detection
179
Feed-delay jam
180
Feed-stationary jam
180
Residual-media jam
180
Power-on sequence
180
MBM driver
181
MBM switches and sensors
184
MBM PCBs
185
MBM list of signals
186
Stapler/stacker system
188
Power-on sequence
188
Staple mode
189
Jogger operation
195
Jogger home-position detection
199
Stacker mode
201
Jam detection
201
Stapler unit
202
Staple home position detection
203
Self-priming detection
203
Staple level detection
203
Stapler/stacker switches and sensors
204
Stapler/stacker motors, solenoid, and fan
206
Stapler/stacker PCBs
207
Stapler/stacker driver PCB
210
Stapler/stacker driver list of signals
212
Scanner system
215
Electrical system
215
Motors and fans
217
Optical assembly
217
ADF feed system
219
Jam detection
219
Residual-media jam
219
ADF pickup jam
220
ADF jam
220
Registration sensor jam
220
Read sensor jam
220
Exit sensor jam
220
ADF cover open jam
220
ADF open jam
220
Locations of major components
221
Sensors and switches
221
Cassette sensors
221
Sensors in the print-cartridge area
222
Sensors on the reversing unit (top side)
222
Sensors in the interior of the MFP
223
Output-bin detection switch, SW103
224
Tray 1 paper-present sensor, PS105
224
Top-cover switch, SW101
225
Tray 2 jam-access-cover switch, SW105
225
Motors, fans, solenoids, and clutch
225
Front-side fans
226
Rear-side fans
227
Rear-side motors (1 of 2)
227
Rear-side motors (2 of 2)
228
Rear-side solenoid
229
Reversing-unit motors and solenoids
230
Right, rear corner components (1 of 2)
231
Right, rear corner components (2 of 2)
232
Scanner and ADF components
232
ADF output-bin-full sensor
232
ADF pickup assembly sensors
233
ADF motors, solenoid, and sensors
233
Removal and replacement
236
Service approach
237
Removal and replacement strategy
238
Required tools
238
Before performing service
238
After completing service
239
Screws that are used in the MFP
239
User-replaceable parts
241
Print cartridge
241
Control-panel overlays
241
Control panel
242
Transfer roller
243
ADF input tray
244
ADF pickup and feed rollers
245
ADF separation pad
246
ADF delivery guide (clear mylar sheet)
248
Output-bin assembly
250
Duplex-printing unit
251
Fuser-entrance guide
252
Fuser
252
Tray 2, 3, 4, or 5 pickup and feed rollers
253
Tray 1 pickup roller
254
Scanner filter cover and scanner filter
255
ADF-hinge flap
256
Formatter cover and formatter
257
Hard drive
259
DIMM
260
Fax accessory
261
Covers, doors, and external panels
263
Top-cover flatbed flange
263
Front cover
264
Back cover
268
Internal assemblies
270
Reversing-separation-guide assembly
270
Reversing assembly
271
Main fan (FN101) and reversing-unit fan (FN103)
275
Thermistor (TH3)
280
Tray 2 jam-access-cover switch (SW105)
282
Tray 1 assembly
284
Front-cover support
286
Tray 1 feed-assembly
288
Feed-roller assembly
295
DC controller
297
Main motor (M101)
300
DC controller fan (FN104)
301
Print-cartridge fan (FN102)
302
Print-cartridge motor (M102)
304
Top-cover switch (SW101)
307
Registration assembly
309
Paper-pickup-drive assembly
312
Lifter-drive assembly
315
Power-factor-correction (PFC) power supply
318
Engine power supply
323
Paper-feed assembly
328
Tray 2 detection switch
329
Paper-size-detection switch (SW102)
330
Tray 2 paper-present sensor (PS101)
331
Laser/scanner
332
Output-bin-full sensor
333
ADF and scanner components
336
ADF assembly
336
Scanner assembly
338
Scanner-controller PCA
343
ADF components
344
ADF output-bin extension
344
ADF white mylar-backing
345
ADF front cover
347
ADF rear cover
348
ADF left-side cover
349
ADF jam-access cover and latch
351
ADF leading-edge and paper-present sensors
352
ADF hinges
354
500-sheet feeder components
356
500-sheet-feeder pickup and feed rollers
356
Stapler/stacker components
357
Delivery tray
357
Front cover
357
Rear cover
357
Left cover
358
Top cover
358
Bottom cover
359
Stapler unit
360
Jogger unit
361
Stapler/stacker driver PCB
365
3-bin mailbox components
367
Rear cover
367
Front cover
367
Delivery tray
367
Left cover
368
Upper cover
368
Right-door unit
369
Bottom cover
371
MBM driver PCB
372
Problem solving
374
Problem-solving checklist
376
Factors that affect performance
376
Problem-solving flowchart
377
Power-on checks
381
Power-on troubleshooting overview
381
Formatter lights
383
HP Jetdirect Inside LEDs
383
Heartbeat LED
383
Fax LED
384
Diagrams for troubleshooting
385
DC controller connections
385
Scanner-controller PCA connections
387
General timing chart
388
General circuit diagrams
390
Solve general device problems
396
Control-panel message types
399
Control-panel messages
400
Common causes of jams
416
Clear jams
417
Clear jams from the top-cover and print-cartridge areas
418
Clear jams from the optional envelope-feeder area
420
Clear jams from the tray 1 area
422
Clear jams from the tray 2, 3, 4, or 5 areas
423
Clear jams from the optional duplexer
425
Clear jams from the output areas
426
Clear jams from the fuser
427
Clear jams from the document feeder
430
Solve repeated jams
431
Paper-path test
432
Clear staple jams
433
Solve print-quality problems
435
Print-quality problems associated with media
435
Print-quality problems associated with the environment
435
Print-quality problems associated with jams
435
Overhead transparency defects
435
Image defect examples
436
Light print (partial page)
436
Light print (entire page)
436
Specs
437
Dropouts
437
Lines
438
Gray background
438
Toner smear
439
Loose toner
440
Repeating defects
440
Repeating image
441
Misformed characters
441
Page skew
442
Curl or wave
442
Wrinkles or creases
443
Vertical white lines
444
Tire tracks
444
White spots on black
445
Scattered lines
445
Blurred print
446
Random image repetition
446
Repetitive defect ruler
448
Solve network printing problems
450
Solve copy problems
451
Prevent copy problems
451
Image problems
451
Media-handling problems
452
Performance problems
454
Solve fax problems
455
Solve sending problems
455
Solve receiving problems
456
Solve e-mail problems
458
Validate the SMTP gateway address
458
Validate the LDAP gateway address
458
Solve network connectivity problems
459
Troubleshooting network printing problems
459
Loopback test
459
Ping test
460
Solve stapler/stacker problems
461
Solve 3-bin mailbox problems
468
Functional checks
471
Early boot diagnostic test
471
Engine test
471
Formatter test
472
Half self-test
472
Drum-rotation test
473
MFP resets
474
Cold reset
474
NVRAM initialization
474
Hard-disk initialization
475
Individual component diagnostics
476
Paper-path-sensor test
476
Manual sensor test
476
Scanner tests
477
Component test
478
Service ID
479
Restoring the Service ID
479
Converting the service ID to an actual date
479
Troubleshooting the embedded HP Jetdirect print server
480
Firmware-stack trace
481
Solve common Windows problems
482
Solve common Macintosh problems
483
Solve Linux problems
486
Solve PostScript problems
487
General problems
487
Parts and diagrams
488
Order parts, accessories, and supplies
489
Order directly from HP
489
Order through service or support providers
489
Order directly through the embedded Web server
489
How to use the parts lists and diagrams
489
Screws that are used in the MFP
490
Customer-replaceable parts and accessories
491
Accessories
491
Customer-replaceable components (print engine)
493
Customer-replaceable components (ADF and scanner)
495
Cables and interfaces
497
Control panel and control-panel overlays
500
Memory
502
Print cartridge and maintenance kits
504
Documentation, software, and training material
507
Assembly locations
509
External components
513
Print-engine internal components
515
Upper-plate assembly
515
Internal components (1 of 5)
517
Internal components (2 of 5)
519
Internal components (3 of 5)
521
Internal components (4 of 5)
523
Internal components (5 of 5)
525
Electrical/forward assembly
527
Main drive assembly
529
Paper-pickup-drive assembly
531
Lifter-drive assembly
533
Cassette
535
Paper-feed roller assembly
537
Registration assembly
539
Multipurpose assembly
541
Reverse assembly
543
Reverse-separation-guide assembly
545
Delivery assembly
547
Fuser
549
ADF components
551
ADF assembly
551
ADF internal components (1 of 3)
553
ADF internal components (2 of 3)
555
ADF internal components (3 of 3)
557
ADF input tray
559
ADF separation pad
561
ADF separation-pad case
563
ADF pickup-roller assembly
565
ADF pickup-roller cover
567
ADF mylar-holder assembly
569
ADF mylar replacement kit
571
Scanner components
573
Scanner-base components
573
Scanner flatbed-unit assembly
575
Scanner covers
577
Cassette
579
Optional devices
581
Duplex-printing accessory
581
Stapler/stacker
583
3-bin mailbox
585
Alphabetical parts list
587
Numerical parts list
603
Specifications
620
Physical specifications
621
Electrical specifications
621
Acoustic specifications
622
Operating environment
623
Product warranty statements
624
Hewlett-Packard limited warranty statement
624
Customer Self Repair Warranty Service
625
HP Customer Care
626
Online Services
626
Telephone support
626
Software utilities, drivers, and electronic information
626
Fax accessory support
626
HP direct ordering for accessories or supplies
626
HP service information
626
HP service agreements
626
HP Toolbox FX
627
HP support and information for Macintosh computers
627
HP maintenance agreements
628
On-site service agreements
628
Next-day on-site service
628
Weekly (volume) on-site service
628
Repacking the device
628
Extended warranty
629
Regulatory information
630
FCC regulations
631
Environmental product stewardship program
632
Protecting the environment
632
Ozone production
632
Power consumption
632
Toner consumption
632
Paper use
632
Plastics
632
HP LaserJet print supplies
633
HP print supplies returns and recycling program information
633
Paper
633
Material restrictions
634
Disposal of waste equipment by users in private households in the European Union
634
Material Safety Data Sheet (MSDS)
635
For more information
635
Telecom statement
636
Declaration of conformity
637
Safety statements
638
Laser safety
638
Canadian DOC regulations
638
VCCI statement (Japan)
638
Power cord statement (Japan)
638
EMI statement (Korea)
638
Laser statement for Finland
638
Index
640
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