E210; E220; E240 - Canon NP6621 Service Handbook

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TROUBLESHOOTING MALFUNCTIONS
8

E210

Cause
Step
1
Lens home
2
position
sensor
(PS2)
DC control-
3
ler PCB
9

E220

Cause
Step
1
DC
2
controller
Composite
power
supply PCB
10

E240

Cause
Step
DC controller
1
PCB
4–6
Checks
Does the lens move when the power
switch is turned ON?
Is the lens home position sensor (PS2)
normal? (See the descriptions on how
to check the photointerrupters.)
Replace the DC controller PCB. Is the
problem corrected?
Checks
Does the scanning lamp turn ON?
Replace the DC controller PCB. Is the
problem corrected?
Checks
Turn OFF/ON the power switch. Is the
problem corrected?
Yes/No
Remedy
NO
See "The lens fails to move."
NO
Check the wiring from the
connector J310 on the DC
controller to the lens home
position sensor (PS2). If
normal, replace PS2.
YES
End.
Yes/No
Remedy
NO
See "The scanning lamp fails
to turn ON."
YES
Replace the DC controller
PCB.
NO
Check the wiring between
the DC controller PCB and
the composite power supply
PCB; if normal, replace the
composite power supply
PCB.
Yes/No
Remedy
YES
End.
NO
Replace the DC controller
PCB or the composite power
supply PCB.

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