E210; E220; E240 - Canon NP6218 Service Manual

CHAPTER 10 TROUBLESHOOTING

10. E210

Cause Step
Lens home
position sensor
(PS2)
DC controller
PCB

11. E220

Cause Step
DC
controller
Composite
power supply
PCB

12. E240

Cause Step
DC controller
PCB
10-68
Checks
1 Turn on the power switch. Does
the lens move?
2 Is the lens home position sensor
(PS2) normal? (See the
instructions on how to check
photointerrupters.)
3 Replace the DC controller PCB. Is
the problem corrected?
Checks
1 Does the scanning lamp turn on?
2 Replace the DC controller PCB. Is
the problem corrected?
Checks
1 Turn on and off the power switch.
COPYRIGHT © 1997 CANON INC.
Results
NO
NO
YES
Results
NO
YES
NO
Results
YES
NO
CANON NP6218 REV. 0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
Action
See "The lens fails to
move."
Check the wiring
between the connector
(J307) on the DC
controller PCB and the
lens home position
sensor (PS2); if normal,
replace PS2.
End.
Action
See "The scanning lamp
fails to turn on."
Replace the DC
controller PCB.
Check the wiring
between the DC
controller PCB and the
composite power supply
PCB; if normal, replace
the composite power
supply PCB.
Action
End.
Replace the DC
controller PCB.