Canon imageRUNNER ADVANCE C5255, Руководство по обслуживанию, Страница: 645 / 1443

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Troubleshooting > Startup System Failure Diagnosis > The viewpoint of this Startup System Failure Diagnosis > Useful Operations
Troubleshooting > Startup System Failure Diagnosis > The viewpoint of this Startup System Failure Diagnosis > Useful Operations
Startup System Failure Diagnosis
The viewpoint of this Startup System Failure Diagnosis
The goal of the startup system failure diagnosis is to be able to solve troubles associated
with a Control Panel display failure by performing the following steps.
It is assumed that the users have already learned the following items:
• How to use a tester
• Roles of the All-night Power Supply (3.3V) and Non-all-night Power Supply (12V)
• How to back up data (HDD and Main Controller)
CAUTION:
AC power supply is always supplied to the AC Driver PCB. Pay attention not to cause
short circuit when accessing the PCB.
■
Useful Operations
The items of detailed procedure explanation start with a description of the flow diagram.
The items and procedures checked in the flow diagram are described separately in a check
item table. The flow diagram contains numbers (e.g. (1)) corresponding to the check items
so that the readers can grasp the relevant parts of the check item table.
Flow
Check item list
The location of each check item
can be referenced by the
corresponding number in the flow
diagram.
Has only
the backlight gone off?
(Can you hear the operation sound
of the Hard Key?)
Is 12V supplied to C1005
of the Control Panel CPU PCB?
Start
[Assumed failure location]
1. Control Panel CPU PCB
2. Main Controller PCB1
3. 12V Connector of the Control Panel
4. Control Panel Unit
(1)
No
No
Yes
Yes
[Assumed failure location]
1. Control Panel Unit
2. 12V Connector of the Control Panel
3. Main Controller PCB1
Turn OFF the Main Power Supply Switch
(2)
(3)
(2)
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