Ricoh MPC6503SP

Symptom

White spots with “toner cores” appear inside solid images/patches when printing under hightemperature conditions.

Cause

• The machine is left unused for an extended time, and toner tends to clump inside the development unit. As a result, toner may not be transferred onto the paper correctly.
• The PCDU is subjected to strong vibration or shock. This may cause toner on the wall of the unit to fall inside the developer and form clumps.
• The toner is left outside the moisture bag too long. This may cause toner to form clumps.

Solution

Do the following, which will clear the toner clumps out of the development unit.

1. Make a test print and determine the affected color(s).
2. Print out 30-200 A3 sheets with solid images of the affected color(s).
3. If the symptom still occurs, replace the toner cartridge of the affected color.
4. Repeat Step 2.
5. If the symptom still occurs, replace the development unit/developer of the affected color.