Canon NP6317 Service Manual page 217

26. 8 indicator does not go ON
Cause/Problem
Procedure
area
1
Jam sensor 2
DC controller
PCB
Control panel 3
DC controller
PCB
27. 8 indicator goes ON when paper feeding is normal
Cause/Problem
Procedure
area
Jam sensor 1
DC controller
PCB
28. indicator does not GO on when there is no toner
Cause/Problem
Procedure
area
Connector 1
connection
Black 2
toner level
sensor (TS1)
Control panel 3
DC controller
PCB
COPYRIGHT © 1999 CANON INC.
Check
Does the copying operation stop when a
jam occurs?
Are the following sensors functioning nor-
mally?
(See p. 10-20.)
• Pre-registration paper sensor (Q2)
• Delivery paper sensor (Q8)
Does the trouble disappear when the con-
trol panel is replaced?
Check
Are the following sensors functioning nor-
mally?
(See p. 10-20.)
• Pre-registration paper sensor (Q2)
• Delivery paper sensor (Q8)
Check
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 J304-2 (BTEP) and the
(-) lead to J304-1 (GND) on the DC con-
troller PCB. Is the voltage approx. 0V?
Does the problem disappear when the con-
trol panel is replaced?
CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 10 TROUBLESHOOTING
Result
Yes Continue from step 3.
No Replace the jam sensor.
Yes Replace the DC control-
ler PCB.
Yes End.
No Replace the DC
contorller PCB.
Result
No Replace the jam sensor.
Yes Replace the DC control-
ler PCB.
Result
No Connect J39 securely.
No 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).
Yes End.
No Replace the DC control-
ler PCB.
Action
Action
Action
10-53