Canon imageRUNNER ADVANCE C5051 Series Service Manual page 464

● In■case■that■the■Paper■Setting■for■the■Poor■Image■is■"Plain■Paper■1"■ ■
Setting■of■the■ITOP■temperature■in■the■plain■paper■1■(COPIER>OPTION>IMG-FIX>FX-S-TMP)■
<Level1>■
Set■the■setting■value■of■the■applicable■service■mode■to■"-1",■and■turn■OFF■and■then■ON■the■
main■power.■If■not■improved,■set■the■setting■value■to■"-2."■
[Notes■about■remedy]■
If■the■applicable■service■mode■is■changed■and■a■heavy■paper■is■fed,■fixing■capability■may■
deteriorate.
■ Missing■color■due■to■the■laser■exposure■failure■ ■
[Occurrence■area]■
Developing■Assembly■
[Cause]■
If■pushing■the■drum■unit■to■the■Developing■Assembly■in■installation,■there■is■a■possibility■to■
catch■the■Mylar■sheet■of■the■Developing■Assembly■downward.■
As■a■result,■since■an■optical■path■is■shut■when■the■laser■for■the■applicable■color■is■irradiated,■
the■image■may■become■light.■
[Occurrence■condition]■
The■installation■failure■of■the■drum■unit■
6
Troubleshooting■>■Troubleshooting■items■>■Image■Faults■>■Missing■color■due■to■the■laser■exposure■failure■
F-6-11
6 Troubleshooting■>■Troubleshooting■items■>■Image■Faults■>■Missing■color■due■to■the■laser■exposure■failure■
[Remedy]■
When■installing■the■Drum■Unit■(Bk)■to■the■host■machine,■perform■the■following■procedures.■
1)Pull■out■the■Process■Unit.
2)Remove■a■dummy■Drum■or■Drum■Unit.
3)Place■the■half■fold■paper■on■the■Developing■Assembly■(Bk).
4)■While■the■paper■is■set,■install■the■Drum■Unit■(Bk)■to■the■host■machine.
6-10
Paper
F-6-12
Drum Unit (BK)
F-6-13
6-10