List of figures
Figure 1-1
Function structure ................................................................................................................... 2
Figure 1-2
Engine control system ............................................................................................................. 4
Figure 1-3
DC controller PCA ................................................................................................................. 5
Figure 1-4
Motor locations ..................................................................................................................... 7
Figure 1-5
Fan locations ........................................................................................................................ 9
Figure 1-6
Low-voltage power-supply PCA ............................................................................................. 11
Figure 1-7
High-voltage power-supply PCA ............................................................................................ 14
Figure 1-8
Fuser components ................................................................................................................ 16
Figure 1-9
Fuser control system ............................................................................................................. 17
Figure 1-10
Laser scanner system .......................................................................................................... 21
Figure 1-11
Image-formation system ...................................................................................................... 23
Figure 1-12
Image-formation components .............................................................................................. 24
Figure 1-13
Image-formation process .................................................................................................... 25
Figure 1-14
Primary charging ............................................................................................................... 26
Figure 1-15
Laser-beam exposure ......................................................................................................... 26
Figure 1-16
Developing ....................................................................................................................... 27
Figure 1-17
Image transfer ................................................................................................................... 27
Figure 1-18
Separation from the drum ................................................................................................... 28
Figure 1-19
Fusing .............................................................................................................................. 29
Figure 1-20
Drum cleaning .................................................................................................................. 29
Figure 1-21
Toner cartridge components ................................................................................................ 30
Figure 1-22
Drum discharge ................................................................................................................. 31
Figure 1-23
Transfer roller cleaning ...................................................................................................... 32
Figure 1-24
Pickup, feed, and delivery system ........................................................................................ 33
Figure 1-25
Pickup, feed, and delivery system sensors and switches .......................................................... 34
Figure 1-26
Pickup, feed, and delivery-system solenoid and motors ........................................................... 36
Figure 1-27
Pickup-and-feed block ........................................................................................................ 37
Figure 1-28
Cassette pickup mechanism ................................................................................................ 38
Figure 1-29
Cassette lift operation ........................................................................................................ 40
Figure 1-30
Cassette multiple-feed prevention ......................................................................................... 41
Figure 1-31
MP tray pickup .................................................................................................................. 42
Figure 1-32
MP tray multiple-feed prevention .......................................................................................... 43
ENWW
xxv
Summary of Contents for LASERJET ENTERPRISE MFP M725dn
Page 1: ...LASERJET ENTERPRISE MFP M725 Troubleshooting Manual M725z M725dn M725f M725z ...
Page 2: ......
Page 3: ...HP LaserJet Enterprise MFP M725 Troubleshooting Manual ...
Page 6: ...iv Conventions used in this guide ENWW ...
Page 32: ...xxx ENWW ...
Page 142: ...110 Chapter 1 Theory of operation ENWW ...
Page 457: ...4 Close the fuser jam access cover 5 Close the fuser door ENWW Clear jams 425 ...
Page 475: ...1 Lift the document feeder latch 2 Open the document feeder cover ENWW Clean the product 443 ...
Page 516: ...484 Appendix A Service and support ENWW ...
Page 545: ......
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