Ricoh FW830, Service Manual

Page: 169 / 227

5.6 DEVELOPMENT BIAS VOLTAGE ADJUSTMENT
ADJUSTMENT STANDARD Adjusting VR
DC –200
±
2 V
VR301
1. Remove the middle right and left cover.
2. Set the multimeter range to dc 1500 V and connect the multimeter leads
as shown.
3. Turn on the main switch.
4. Turn on DPS101-7 and 101-8 on the main board to enter the output
check mode.
5. Enter output check No. 29. (See Output Check Mode Access Procedure.)
6. Press the Plus (+) key until "9" is displayed in the Copy Counter indicator.
Then, press the Copy Exit Way key to apply the bias voltage.
7. Adjust the bias voltage to –200
±
2 V by turning VR301 on the
Charge/Bias/Grid power pack [A].
8. Press the Copy Exit Way key and turn off DPS101-7, 101-8, and the main
switch.
[A]
31 December 1992 DEVELOPMENT
5-29