8.5 GRID VOLTAGE ADJUSTMENT
ADJUSTMENT STANDARD Adjusting VR SP Mode
DC –910
±
15 V
VRG SP9-2
NOTE:
Normally, each High Voltage Supply Board spare part is adjusted in
the factory before shipment. This adjustment is not required when
the board is replaced.
+
WARNING
Very high voltage is applied from the high voltage supply unit
terminals. Pay extreme attention when adjusting the grid voltage.
Make sure that the machine is unplugged before connecting the
multimeter.
1. Remove the rear cover. (See Rear Cover Removal.)
2. Set the multimeter range to dc 1,500 V, and connect the multimeter leads
as shown.
3. Turn on the charge corona using SP9-2.
4. Adjust the grid voltage by turning VRG on the high voltage supply unit.
A219R562.wmf
Replacement
Adjustment
20 December 1996 COPY QUALITY ADJUSTMENT
6-55
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