Ricoh FW780 Service Manual page 458

     
SUBJECT: BLANK COPIES
SYMPTOM:
Intermittent blank copies, partially blank copies or blank copies.
POSSIBLE CAUSES:
1. Arcing from Charge Corona.
2. Arcing from the High Voltage Leads / Receptacles.
3. No voltage output from the C, G, B Power Pack.
4. Fuse 3 Open.
SOLUTION:
Inspect the following parts for proper operation and/or signs of arching. Replace the parts as necessary.
1. Relay Receptacle - Charge Corona (AD021113).
2. Charge Corona Receptacle (AD021114).
3. Charge Corona Assembly (A1632050).
4. Power Pack - C, G, B (AZ320079).
5. Power Supply (AZ230056).
6. Fuse 3 on Power Supply.
NOTE: Inspect Grid Wire routing (see illustration below). Ensure that wire junctions are positioned as
shown and staggered. If the wires cross or touch each other, arcing or copy quality problems may occur.