Loop control
The product controls the loop of paper to prevent print-quality and paper-feed defects.
●
If the fuser film/pressure roller rotates slower than the photosensitive drum/transfer roller, the
paper loop increases.
●
If the fuser film/pressure roller rotates faster than the photosensitive drum/transfer roller, the paper
loop decreases.
The DC controller detects the loop amount by monitoring the loop sensor and controls the rotational
speed of the fuser motor.
Figure 1-35
Loop control
M1
M3
DC controller
SR6
Loop sensor
Pressure roller
Loop sensor lever
Fuser film/Pressure roller rotates slower than photosensitive drum/transfer roller.
Paper
Photosensitive
drum
Fuser motor
Drum motor
Fuser film
Transfer roller
Fuser film/Pressure roller rotates faster than photosensitive drum/transfer roller.
48
Chapter 1 Theory of operation
ENWW
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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