Ricoh FT 4015, Service Manual

Page: 182 / 229

8.6 TRANSFER CURRENT ADJUSTMENT
ADJUSTMENT STANDARD Adjusting VR SP Mode
DC –350
±
4
µ
A
VRT SP9-3
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 drum current.
Make sure that the machine is unplugged before connecting the
multimeter.
1. Remove the rear cover. (See Rear Cover Removal.)
2. Disconnect the connector from the T corona current terminal [A]. Then
connect the ground terminal of the multimeter to the connector [B], and
connect the positive terminal to the T terminal of the high voltage supply
board as shown in the illustration.
NOTE: Make sure that the connector [B] is not in contact with the T
terminal [A].
4. Turn on the transfer corona using SP9-3.
5. Adjust the drum current by turning VRT on the high voltage supply board.
[A]
[B]
A219R563.wmf
COPY QUALITY ADJUSTMENT 20 December 1996
6-56