Sharp SF-1014 Service Manual page 87

Purpose/kind Section
Operation Optical unit
check
Operation unit
Fuser unit
Process
Operation
check
Main Sub
code code
1 1 Used to check the operation of the scanner unit and its control circuit.
(Operation/procedure)
When the print button is pressed, scanning is performed at the speed cor-
responding to the currently set copy magnification ratio.
The copy magnification ratio can be set arbitrarily.
2 Used to check the operations of the sensors and detectors in the optical unit
and their related circuits.
(Operation/procedure)
ON/OFF of the sensors and detectors in the optical unit can be monitored with
the lamps on the operation panel.
Mirror home position sensor (MHPS)
Lens home position sensor (LHPS)
3 Used to check the operation of the lens unit and its control circuit.
(Operation/procedure)
The lens unit moves to each position of the following copy magnification ratios
continuously, and stops at each position for about 0.5 sec.
The copy magnification ratio corresponding to each stop position of the lens is
displayed on the operation panel.
10% → Reduction 1 → Reduction 2 → Enlargement 1 → Enlargement 2 →
100%
4 Used to check the operation of the optical unit and its control circuit.
(Operation/procedure)
The operation of simulation 1-3 is repeatedly performed.
5 3 Used to check the operation of the copy lamp and its control circuit.
(Operation/procedure)
The copy lamp lights up for first one sec at full power, and lights for 4 sec at
the currently set exposer level (copy density).
5 1 Used to check the operations of the lamps on the operations panel and their
control circuits.
(Operation/procedure)
All display lamps on the operation panel turns on for 5 sec.
5 2 Used to check the operation of the heater lamp and its control circuit.
(Operation/procedure)
The heater lamp turns on for 500ms, and off for 500ms five times repeatedly.
5 4 Used to check the operation of the discharge lamp and its control circuit.
(Operation/procedure)
The discharge lamp lights up for 30 sec.
5 Used to check the operation of the blank lamp and its control circuit.
(Operation/procedure)
The blank lamps lights up sequentially from the rear frame side to the front
frame side, and all the lamps light up for 10 sec.
6 2 Used to check the operation of the OPC separation pawl solenoid and its
control circuit.
(Operation/procedure)
The OPC separation pawl solenoid repeats 0.5 sec ON and 0.5 sec OFF
twenty times.
Contents
Description
Sensor name
OPC drum lamp
Toner empty lamp
Full power
CLV
1sec 4sec
8 – 10
Display lamp
EXP1~5 voltage
Ref. page
3-4