Irregular Density; White Spot - Ricoh FAX1120L Service Manual

TROUBLESHOOTING FLOW CHART

4.5.14 IRREGULAR DENSITY

OK after taking
out and rocking
the AIO?
YES
It is over the guaranty
life of AIO (Check the
counter and replace it)

4.5.15 WHITE SPOT

Is it regular interval
of 75.4 mm
YES
Obstacles stuck on OPC's
surface
→ Clean the OPC and
machine or replace
AIO
When putting in/out the
AIO, scratch is made
→ Replace the AIO
When gray
NO
pattern printing,
irregular density
persists?
YES
Bad images
around the no
image area?
YES
Light distortion due to the
mirror ruined or LSU's
diffused reflection
→ Replace LSU
NO
Transfer voltage is
D/R in developing unit has
the defect
→ Replace the AIO
Transfer/charge/
NO
developing voltage
drops while printing?
YES
Check high voltage output
and repair/replace
terminals, HVPS
Irregularity of toner supply
NO
from the AIO
→ Replace the AIO
NO
normal?
YES
4-18
10 October, 2002
Defective agitator in the
toner supplying part of AIO
→ Replace the AIO
NO
Check if the "guide deve
spring" works OK and
repair/replace
H911T924.WMF
Too high voltage supplied
due to the setting error of
transfer voltage
→ Adjust/replace HVPS
H911T925.WMF