Specifications

1.13 TONER DENSITY TOO LOW
- Phenomenon -
1. Light copy
2. Carrier is on the copy.
3. Light spots appear in black solid areas.
- Possible Causes -
1. Light intensity of the exposure lamp is too low.
2. Toner supply clutch does not rotate.
3. Copier is in the fixed toner supply mode.
4. Main board is defective.
5. ID sensor voltage is too high.
6. Charge corona current is too high.
7. ID sensor grid voltage is too high.
- Action -
Does an ID sensor abnormal condition occur?
No Yes
See the ID Sensor Abnormal Condition section.
Does the toner supply clutch rotate?
Yes No
Check the voltage at CN118-1 on the main board
24V 0V
Replace the toner supply clutch solenoid.
Replace the main board.
Go to A
1 December 1990
6-18