Canon GP335 Service Manual page 492

CHAPTER 14 TROUBLESHOOTING
15 E191 (The serial communication between DC controller PCB and
composite power supply PCB has a fault.)
Cause
Connector
Harness
DC controller
PCB, Composite
power supply
PCB
14-74
Step
1 Turn off and then on the power.
2 Is the connection of J103 on the
DC controller PCB normal? Is the
connection of J209 on the
composite power supply normal?
3 Is there continuity on the harness
between DC controller PCB and
composite power supply PCB?
• J103-A1 to J209-A12
• J103-A3 to J209-A10
• J103-A6 to J209-A17
• J103-A7 to J209-A16
COPYRIGHT © 1999 CANON INC. CANON 405/335 REV.0 JAN. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
Check Yes/No Action
YES End.
NO Correct the connection.
NO Replace the harness.
YES Replace the DC
controller PCB and the
composite power supply
PCB.