
2DA/2DB
1-5-28
(3) Image is too light.
Causes
1. Insufficient toner.
2. The transfer voltage is not output properly.
3. Dirty main charger wire.
4. Dirty main charger grid.
Causes
Check procedures/corrective measures
1. Insufficient toner.
If the display shows the message requesting toner replenishment,
replace the container.
2. The transfer voltage is not output properly. Clean or check the transfer roller (see page 1-6-42).
3. Dirty main charger wire.
Clean the main charger wire or, if it is extremely dirty, replace the main
charger unit (see page 1-6-40).
4. Dirty main charger grid.
Clean the main charger grid or, if it is extremely dirty, replace the main
charger unit (see page 1-6-40).
(4) Background is visible.
Causes
1. The developing bias voltage is not properly.
2. Dirty main charger wire.
Causes
Check procedures/corrective measures
1. The developing bias voltage is not prop-
erly.
Replace the high voltage PCB and check for correct operation.
2. Dirty main charger wire.
Clean the main charger wire or, if it is extremely dirty, replace the main
charger unit (see page 1-6-40).
(5) A white line appears longitudinally. Causes
1. Dirty main charger wire.
2. Foreign matter in the developing unit.
3. Dirty shading plate.
Causes
Check procedures/corrective measures
1. Dirty main charger wire.
Clean the main charger wire or, if it is extremely dirty, replace the main
charger unit (see page 1-6-40).
2. Foreign matter in the developing unit.
Check if the magnetic brush is formed uniformly. Replace the developing
unit if any foreign matter (see page 1-6-41).
3. Dirty shading plate.
Clean the shading plate.
Содержание KM-1650
Страница 1: ...SERVICE MANUAL Published in June 05 2DA70763 Revision 3 KM 1650 2050 ...
Страница 4: ...This page is intentionally left blank ...
Страница 10: ...This page is intentionally left blank ...
Страница 248: ...2DA 2DB 1 2 3 2 Figure 2 3 2 Power source PCB silk screen diagram 220 240 V AC 120 V AC ...
Страница 265: ...2DA 2DB 1 2 3 19 Figure 2 3 10 Operation unit PCB silk screen diagram ...
Страница 280: ......