Canon NP6251 Service Manual page 629

CHAPTER 11 TROUBLESHOOTING
28. E800
Cause Step
Malfunction
J716
Power switch
(SW1)
DC controller
PCB
29. E802
Cause Step
Malfunction
DC controller
PCB
Power supply
unit
11-98
COPYRIGHT © 1997 CANON INC.
Checks
1 Turn off and then on the power
switch. Is the problem corrected?
2 Is the relay connector J716 under
the power switch (SW1)
connected securely?
3 Set the meter to the
Disconnect the relay connector
J716, and connect the probe of
the meter to the connector
terminal on the power switch side.
Is the voltage about 30 ?
Checks
1 Turn off and on the power switch.
Is the problem corrected?
2 Replace the DC controller PCB. Is
the problem corrected?
YES/NO
YES
NO
1 range. NO
YES
YES/NO
YES
YES
NO
CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
Action
End.
Connect it securely.
Replace the power
switch (SW1).
Check the wiring from
the DC controller PCB to
the power switch (SW1);
if normal, replace the DC
controller PCB.
Action
End.
End.
Check the wiring and
electrical continuity from
the DC controller to the
power switch (SW1); if
normal, replace the DC
controller PCB.