Canon NP6320 Service Manual page 232

CHAPTER 10 TROUBLESHOOTING
27. indicator does not go ON
Cause Step
1
Jam sensor 2
DC controller
PCB
Control panel 3
DC controller
PCB
28. indicator goes ON when paper feeding is normal
Cause Step
Jam sensor 1
DC controller
PCB
29. indicator does not go ON when there is no toner
Cause Step
J39 connec- 1
tion
Black 2
toner level
sensor (TS1)
Control panel 3
DC controller
PCB
10-54
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Checks
Does the copying operation stop when a
jam occurs?
Are the following sensors functioning nor-
mally?
(See p.10-19.)
• Pre-registration paper sensor (Q2)
• Delivery paper sensor (Q5)
Does the trouble disappear when the con-
trol panel is replaced?
Checks
Are the following sensors functioning nor-
mally?
(See p. 10-19.)
• Pre-registration paper sensor (Q2)
• Delivery paper sensor (Q5)
Checks
Is the connector J39 of the pin inside the
upper front cover connected?
Set the meter to the 12VDC range. Con-
nect the (+) lead to J306-2 (BTEP*) and
the (−) lead to J306-1 (GND) on the DC
controller PCB. Is the voltage approx. 0V?
Does the problem disappear when the con-
trol panel is replaced?
COPYRIGHT © 1999 CANON INC.
YES/
NO
YES
NO
YES
YES
NO
YES/
NO
NO
YES
YES/
NO
NO
NO
YES
NO
CANON NP6320 REV.0 DEC. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
Action
Continue from step 3.
Replace the jam sensor.
Replace the DC control-
ler PCB.
End.
Replace the DC
contorller PCB.
Action
Replace the jam sensor.
Replace the DC control-
ler PCB.
Action
Connect J39 securely.
Check the wiring from
the DC controller PCB to
TS1 and check the
movement of the stirring
rod inside the black de-
veloping assembly. If
these are normal, replace
the black toner level sen-
sor (TS1).
End.
Replace the DC control-
ler PCB.