Canon GP405 Service Manual page 419

You will find troubleshooting steps organized in tables which are modified versions of general
flow charts. Study the following for an idea of how to consult them.
EX.AC power is absent.
Cause
Power plug
Covers
Power supply
If you want to find out the cause (possible faulty part), see the column under "Cause."
In the case of "AC power is absent," the power plug may be disconnected, the covers may not
be closed firmly, or the main power supply is absent.
If you want to find out the action to take or the steps to correct a specific problem, go through
the steps in order. Answer YES or NO to the questions under "Checks," and take the action
indicated accordingly.
COPYRIGHT © 1999 CANON INC. CANON 405/335 REV.0 JAN. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
Step Checks
1 Is the power plug connected to the
power outlet?
2 Are the front door and the delivery
cover closed firmly?
3 Is the specified voltage present at
the power outlet?
4 Is the specified voltage present
between J1-1 and J1-2? (J1 is found
near the power cord mount.)
CHAPTER 14 TROUBLESHOOTING
YES/NO
NO Connect the power plug.
NO Close the door and the
cover.
NO The problem is not of
the machine. Advise the
user.
YES Go to step 6.
Action
14-1