Flow E: 12V Power Supply System Flow - Canon imageRUNNER ADVANCE C5255 Series Service Manual

Flow E: 12V Power Supply System Flow

■ Status Check
If 12V is not output to the orange and blue Lead Wires of the 12V Power Supply Connector,
identify the location of the failure according to the flow.
■ Flow for narrowing down troubles
Description
To check the output of the 12V Power Supply, check the following two points.
• Check the output from the 12V Power Supply
• Check the output from the AC Power Supply
● 12V Power Supply System Flow
12V is not supplied to
the Main Controllers.
- Check the connection of the
*1:
Relay PCB connectors.
Check whether 12V is supplied between the orange and
- Disconnect and then connect all
blue Lead Wires of the 12V Power Supply Connector.
the connectors, and restart
(2)
1.Turn OFF the Main Power Supply Switch.
2.If the FU10 and FU11 of the Relay PCB are
(1)
Check the output from
3.If any of the cables are trapped between J421 of the
the 12V Power Supply
Yes
*1
4.If no cable is trapped, replace all of the following:
No
(3)
(4)
Is the AC Power Supply
Check whether the following Harnesses
being output?
Yes
No
1.Replace the AC Driver PCB
[Replacement work after check]
2.Replace the Main Controller PCB1
3.Check the harnesses of the
AC Driver (three points)
6
Troubleshooting > Startup System Failure Diagnosis > Flow E: 12V Power Supply System Flow > Flow for narrowing down troubles
disconnected, check whether the cables are trapped.
Relay PCB and J104 of the Riser PCB, correct them.
Main Controller 1, Main Controller 2, Riser PCB,
and Relay PCB.
of the Relay PCB are trapped
- J401(pins 8)
- J411(pins 1, pins 3 - pins 5)
- J431(pins 5)
- Replace the 12V Power Supply
- Replace the Relay PCB
6 Troubleshooting > Startup System Failure Diagnosis > Flow E: 12V Power Supply System Flow > Flow for narrowing down troubles
● Check item
Check the output from the 12V Power Supply
Item Check item
(1) 12V Power
Supply
Connector
on the cable
side
Lead Wire:
Orange
Lead Wire:
Blue
Normal
value: 12V
Orange Lead Wire (+12V) and blue Lead Wire > Normal value: 12V
(2) Disconnect
J421 of the
Relay PCB
and check
the following
resistance:
Relay PCB
FU10
FU11
F-6-147
Location
Lead Wire: Orange
Lead Wire: Blue
6-118
FU11
FU10
6-118