Ricoh FT 4015 Service Manual page 201

20 December 1996
1.9 JITTER
- Problem -
Jitter appears on the copy.
- Possible Causes -
1. Drum not turning smoothly
2. Scanner not moving smoothly
- Action -
Does the jitter interval change when a reduction copy is made?
Yes No
Check drum drive mechanisms such as the drum drive gears and drum
pulleys.
No Good
Reinstall them correctly or replace the defective parts.
Are the scanner drive belts correctly installed?
Yes No
Reinstall them correctly or replace the defective parts.
Does the voltage at CN103-2 through 5 on the main board stay at 24 volts
when the key is pressed?
24 volts Not always 24 volts
Replace the scanner motor or check the scanner operation.
Replace the main board.
7-11
COPY QUALITY