5–3
TROUBLESHOOTING FEEDING FAULTS
Cause
Delivery assembly
separation claw
Lower fixing
roller, Upper
fixing roller
Paper guide
Nip
Delivery lever
Delivery sensor
(PS8)
Leading edge
margin
Cause
Transfer charging
Copy paper
Feeding belt
Remedy
Check the charging
assembly.
Remove the burrs.
Advise the user to use
recommended paper.
Check the belt pulley.
Check the feeding belt
for deformation and
wear.
2
Separation/Feeding Assembly
Remedy
1. Replace the separa-
tion claw.
2. If dirt is found, clean it
with solvent.
Replace the roller.
Clean it with solvent.
Adjust it.
Adjust it so that it moves
smoothly.
Replace the sensor.
Check if there is margin
along the leading edge of
the copy.
3
Fixing/Delivery Assembly
Yes/No
YES
YES
YES
NO
NO
NO
NO
Fixing
Yes/No
NO
YES
YES
NO
YES
Checks
Is the transfer charging assembly
installed properly?
Are there burrs on the paper guide
of the transfer charging assembly?
Try recommended paper. Is the
problem corrected?
Are the two feeding belts moving
properly?
Step
1
2
3
4
Step
1
2
3
4
5
6
7
Checks
Is wear or deformation noted on
the separation claw?
Is the lower fixing roller or the
upper fixing roller deformed or
scratched?
Is the paper guide soiled with
toner?
Is the nip within specification?
Does the delivery detection lever
operate smoothly?
Is the operation of the delivery
sensor normal? (See the descrip-
tions on how to check the
photointerrupters.)
Is there margin?
Delivery assembly
Содержание NP6621
Страница 4: ...ii ...
Страница 8: ...vi ...
Страница 48: ...3 2 IMAGE FAULTS ...
Страница 49: ...3 3 IMAGE FAULTS NOT USED ...
Страница 50: ...3 4 IMAGE FAULTS B Image Fault Samples not available ...
Страница 80: ...4 16 TROUBLESHOOTING MALFUNCTIONS ...
Страница 98: ...6 8 ARRANGEMENT AND FUNCTIONS OF THE ELECTRICAL PARTS D PCBs Figure 6 603 1 2 3 4 5 6 7 8 9 10 11 12 ...
Страница 108: ...6 18 ARRANGEMENT AND FUNCTIONS OF THE ELECTRICAL PARTS 4 Fixing Heater Driver PCB Figure 6 611 J402 1 J401 W1 W2 ...
Страница 134: ...A 4 APPENDIX ...
Страница 135: ...A 5 APPENDIX C GENERAL CIRCUIT DIAGRAM not available ...
Страница 136: ...A 6 APPENDIX ...
Страница 144: ...A 14 APPENDIX ...