Copy Quality; Blank Copy (White Copy) - Ricoh Robin Service Manual

24 June 1994

1. COPY QUALITY

1.1 BLANK COPY (WHITE COPY)

- Problem -
White or almost white copy.
- Possible Causes -
1. Charge is not applied.
CC/Grid/bias power pack (charge or grid) failure
•
• Poor contact of power pack lead wires
Broken charge corona wire
•
Leak in insulator or endblock
•
2. Copy image is not transferred to the paper.
TC/SC power pack (transfer) failure
•
Poor contact of the power pack lead wires
•
• Poor contact of the transfer corona wire
Leak in the insulator or endblocks
•
3. The development roller does not rotate.
• Broken drive gear
4. The development roller is not properly grounded.
5. Poor drum sensitivity.
The drum was exposed to fluorescent light or direct sunlight for a long
•
period of time.
The drum was exposed to ammonia gas or corrosive fumes for a long
•
period of time.
6. The drum does not rotate.
6-1
COPY QUALITY