Ricoh FAX7000L, Field Service Manual

Page: 245 / 377

Symptom
Action
Low image density
Check that the following connectors are not loose: SPU CN5 - DRU CN3,
(continued) DRU CN1. Does the development clutch operate?
Y N
Replace either the development clutch, the
DRU,
the SPU, or the SCU.
Does the power pack send trigger signals to the transfer and
charge corona wires? (Charge corona wire operation can be checked
with service function 09, mode 6.)
Y N
Change the SCU or SPU.
Is there any power at the corona units?
Y N
Change the power pack.
Is there any toner in the toner cartridge?
Y N
Check the toner end sensor mechanism. Does SPU CN17-3 go
low if the actuator leaves the toner end sensor?
Y
N
Replace the sensor.
If the Add Toner indicator does not light when there is no toner,
replace the SCU, SPU, or OPU.
2. Clean the white plate used for auto-shading. Check the SBU white level voltage
(see page 3-13).
3. Check the transfer guide plate adjustment (page 3-35).
5-10