Ricoh FT4480 Field Service Manual page 208

BLANK AREA OR PATCHY IMAGE
- Possible Causes -
• Uneven PTC, transfer, or separation coronas.
- Action -
Are the PTC, transfer, and separation corona wires improperly installed?
Y N
I
Clean the PTC, transfer, and separation corona wires and adjust the
corona currents.
Clean and reset the wire(s).
UNFUSED COPY
IMAGE CAN BE EASILY RUBBED OFF
- Possible Causes -
Thermistor malfunction
Very low early morning
Copy paper has a very
- Action -
Does the problem occur only early in the morning?
Y N
I
Is the thermistor dirty or damaged?
Y N
I
Increase fusing temperature using SP mode 49. If the problem
still occurs, increase fusing pressure.
Clean or replace the thermistor.
Select the fusing idling mode using SP mode 29.
temperatures.
rough surface.
9-3
15 March 1987