Sharp AR-280 Service Manual page 54

(AR-501/505/507)
(Measurement at the high voltage PWB check point)
3) Remove the rear cabinet.
4) Connect the digital multi-meter to the grid voltage output check pin
(CN2-5 pin).
5) Set the digital multi-meter range to the DCV range.
(Use a digital multi-meter which allows measurement up to
DC1000 V.)
6) Manually turn on the door switch.
7) Turn on the main switch, and execute SIM 8-2 to check.
8) If the output voltage is not in the specified range, change the
displayed value and adjust. (1 step: about 1V)
AR-280/
285/335
–642 ±5V
Grid voltage (Auto)
–642 ±5V
Grid voltage (Character)
Grid voltage (Character,
–642 ±5V
Photo)
–642 ±5V
Grid voltage (Photo)
Grid voltage (Toner save)
–642 ±5V
Grid voltage (Printer)
(The value and the output may not coincide.)
7/13/2000
Adjustment range
AR-250/281/
AR-501/
286/287/336/
505/507
337/405/407
–602 ±5V –570 ±5V
–602 ±5V –645 ±5V
–602 ±5V –645 ±5V
–602 ±5V –645 ±5V
–552 ±5V –645 ±5V
—
–602 ±5V –645 ±5V
(5) Transfer charger current adjustment
a. Special measurement tool
Electrode sheet (UKOG-0110FCZZ)
Electrode sheet harness (DHAI-0304FCZZ)
(Microswitch)
(QSW-M0118FCZZ)
PHOG-0007FCZZ
QTIPH0017FCZZ
(Parts arrangement)
Orange
White
(VRN-RT2EK304F)
b. Adjustment procedure
1) Remove the developing unit, the transfer/separation charger unit,
and the main charger unit from the copier.
2) Remove the process unit from the copier.
3) Remove the OPC drum from the process unit, and install the
electrode sheet by using a rubber band, tape, etc.
4) Install the OPC drum with the electrode sheet installed to the
process unit, and install the process unit to the copier.
5) Install the drum holder unit to the copier so that the electrode
sheet lead wire can be taken out from the developing unit side.
AR-280/285/335
6 – 4
UKOG-0110FCZZ
Orange
A
Orange Green
Blue
Blue
Black
White
Black
Yellow
White
Red
Red
Blue
300KΩ X 2
Black
(QCLIZ0005FCZZ)
(QCLIZ0006FCZZ)
(QCLIZ0010FCZZ)
(QCLIZ0004FCZZ)
(QCLIZ0002FCZZ)