Canon imageRUNNER ADVANCE C5051 Series Service Manual page 89

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Technology■>■Image■Formation■System■>■Controls■>■Developing/drum
MEMO:
Fuse■cut■operation■is■executed■when■the■power■is■turned■ON■after■a■new■Drum■Unit■is■
installed.
Thus,■if■replacing■a■Drum■Unit■to■another■one■(new■one)■to■identify■a■cause■of■failure■at■
a■field,■fuse■is■blown■and■the■drum■thickness■data■is■cleared.
As■a■result,■even■though■the■original■Drum■Unit■is■installed■to■the■host■machine■again,■
the■host■machine■identifies■it■as■like-new■one■and■correct■print■image■may■not■be■output.
With■consideration■to■above■matter,■do■not■use■a■new■Drum■Unit■when■identifying■a■
cause■of■failure.
Related■service■mode
COPIER■>■FUNCTION■>■INSTALL■>■AINR-OFF■(fuse■cut■extend■on■new■drum■unit)
This■is■to■disable■the■Drum■Unit■initialization■to■be■executed■when■a■new■Drum■Unit■is■
inserted.■Also,■fuse■meltdown■after■Drum■Unit■initialization■will■not■be■executed.
This■is■used■when■replacing■a■Drum■Unit■temporarily■and■checking■the■image■to■identify■
a■cause■of■a■trouble■etc.
0:■Initialization■is■executed■when■a■new■one■is■installed.■Fuse■meltdown■is■executed.■
[Default]
1:■Initialization■is■not■executed■when■a■new■one■is■installed.■Fuse■melt■down■is■not■
executed.
Make■sure■to■set■this■service■mode■to■"1"■only■when■it■is■necessary■at■servicing.■Be■sure■
to■reset■this■service■mode■to■"0"■when■service■works■are■completed.
2 Technology■>■Image■Formation■System■>■Controls■>■Developing/drum
● Drum■life■detection ■
To■detect■life■of■the■Photosensitive■Drum.
The■life■data■is■stored■in■the■SRAM■(IC2)■of■the■DC■Controller.
The■drum■life■value■can■be■checked■from■the■service■mode.
Data■storage■
Target■drum Detection■items
Color■drum Primary■Charging■AC■Bias■ SRAM■(IC2)■
(YMC) Monitor■value■(For■details,■ of■the■DC■
refer■to■"Drum■film■thickness■ Controller
detection".)
Bk■drum Drum■rotation■time■+■Primary■
charging■AC■bias■applying■
time
Reference■service■mode Unit
location
Display■of■the■drum■life■ %■(In■
counter■value increments■
(COPIER■>■COUNTER■>■ of■approx.■
LF■>■Y-DRM-LF,■M-DRM- 7%)
LF,■C-DRM-LF)
Display■of■the■drum■life■ %■(In■
counter■value increments■
(COPIER■>■COUNTER■>■ of■1%)
LF■>■K-DRM-LF)
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