Canon LASER CLASS 730i Service Manual page 93

LASER CLASS 730i/720i/710 Chapter 4: Maintenance and Service
White horizontal lines
Faulty registration
Distortion/BD signal failure
Partially compressed/stretched image
Poor fixing
• Scanning problems (Evaluation criteria: Test printing is good, but the copied
image is poor.)
• The document is not fed.
The document feed motor does not run.
The document skews.
Two or more documents are fed at the same time
• The scanning image is abnormal.
Noting is printed.
The image has vertical stripes.
The image has thick vertical stripes.
• Test mode function problems
• Faulty control panel test
The LCD panel does not display correctly.
The LED lamp fails to go ON.
The keys on the operation panel fails to work properly.
• Faulty contact sensor test
The LED of the contact sensor fails to go ON properly.
• Faulty DRAM test
The indication "READ & COMPARE NG" appears.
• Faulty sensor test
DES sensor fails to operate properly.
DS sensor fails to operate properly.
DWS sensor fails to operate properly.
DFS sensor fails to operate properly.
Cassette 1 paper sensor fails to operate properly.
Cassette 2 paper sensor fails to operate properly.
Cassette 3 paper sensor fails to operate properly.
MP tray paper sensor fails to operate properly.
Tray full sensor fails to operate properly.
Face-up sensor fails to operate properly.
Printer cover sensor fails to operate properly.
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