Operation Malfunction Countermeasures - Canon GP160DF Service Manual

CHAPTER 13 TROUBLESHOOTING
C.

Operation malfunction countermeasures

1 No power
Cause Steps
Power plug 1
No power sup- 2
plied from out-
let
Fuse 3
DC power sup-
ply PCB
2 No LCD display on the control panel
Cause Steps
Monitor/Display 1
contrast
Poor connector 2
contact
Control panel 3
Image proces-
sor PCB
13-26
Checks
Is the power plug connected?
Is the prescribed voltage being sup-
plied to the outlet?
Are fuses F3, F4 or F5 on the DC
power supply PCB blown?
Checks
Is the control panel display contrast
adjustment volume properly set?
Are connectors J41 and J42 on the
control panel PCB and connector
J203 on the image processor PCB
properly connected?
Is the trouble resolved when the con-
trol panel is replaced?
COPYRIGHT © 1999 CANON INC.
Yes/No
NO
NO
YES
Yes/No
NO
NO
YES
NO
CANON GP160 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
Action
Connect the power
plug.
Explain to the customer
that the trouble is not
caused by the
machine.
Investigate why the
fuse blew.
Replace the DC power
supply PCB.
Action
Reset the contrast vol-
ume.
Reconnect the connec-
tors.
End
Replace the image
processor PCB.