Canon imageRUNNER ADVANCE C5051 Series Service Manual page 474

Flow■A:■Execution■Flow■for■Control■Panel■Startup■
Failure■
■ Status■Check ■
If■nothing■is■displayed■on■the■Control■Panel■when■the■power■of■the■host■machine■is■turned■
ON,■identify■the■location■of■the■failure■according■to■the■flow.
● Flow■for■narrowing■down■troubles ■
If■the■Main■Power■LED■is■ON,■the■All-night■Power■Supply■(3.3V)■is■being■supplied.
If■the■12V■Power■Supply■is■activated,■the■Control■Panel■Backlight■can■be■activated.
If■the■power-on■signal■(3.3V)■is■supplied■to■the■12V■Power■Supply,■the■12V■can■still■activate■
the■Control■Panel■Backlight.
If■the■power-on■signal■is■blocked,■the■12V■Power■Supply■stops■supplying■power.
If■the■Main■Controller■LED■is■momentarily■activated■or■the■fan■momentarily■rotates■and■then■
stops■after■the■Main■Power■SW■is■turned■ON,■the■overcurrent■protection■may■be■active■and■
stopping■the■supply■of■power.
Consult■this■flow■when■checking■the■3.3V■and■12V■power■supplies■and■identifying■the■
location■of■the■failure■in■"Execution■Flow■for■Control■Panel■Startup■Failure"■described■below.
6
Troubleshooting■>■Startup■System■Failure■Diagnosis■>■Flow■A:■Execution■Flow■for■Control■Panel■Startup■Failure■■>■Status■Check
6 Troubleshooting■>■Startup■System■Failure■Diagnosis■>■Flow■A:■Execution■Flow■for■Control■Panel■Startup■Failure■■>■Status■Check
The Control Panel does not display
Check if the Leakage
Breaker is turned OFF
Does the
Yes
host machine start warm-up
rotation?
No
To Control Panel 12V Check Flow
(1)
Yes
Is the Control Panel LED
ON?
No
(2)
Yes
Is the Main Controller 1
LED8 ON?
No
To Control Panel 12V Check Flow
(3)
Yes
Is 3.3V supplied to the
Riser PCB C26?
No
Flow D :
To All-night Power Supply
(3.3V) System Flow
(4b)
Is 12V supplied to
Ｙｅｓ
Main Controller 1 and
Main Controller 2?
No
(4a)
(4a)
(4b)
At the time of startup,
does the LED of Main Controller Yes
1 or 2 momentarily turn ON
or do the fans of the Main
Controllers rotate?
No
Flow E :
To 12V Power Supply System Flow
6-20
Flow B :
Flow B :
Replace Main Controller 1
Flow C : To Main Controller Analysis Flow
[Check points]
1. - Activation of Main Controller 1 LED8
- Activation of Main Controller 2 LED4
2. RISER PCB J104 pins 1 - pins 4(12V)
Flow F :
To Connector Disconnection Flow
(Model Specific)
F-6-26
6-20