Service manual

AR-651/810 PROCESS SECTION 10 - 3
10. 3. Charger Wire Cleaner Operational Circuit
(1) Role of the charger wire cleaner circuit
This circuit is for cleaning the main charger wire. It reciprocates the wire cleaner regularly to avoid
a poor charging and irregularities of the drum.
(2) Configuration of the charger wire cleaning circuit
• Wire cleaner drive motor : Driving of the wire cleaner
• Wire cleaner stop position switch : Detection of the wire cleaner reaching the limit (rear side)
• Control section : Controlling of the cleaner drive unit and cleaning of the wire
[Front side] [Rear side]
Drive unit control signal
IC9
IC56
IC58
PWA-F-LGC-340/341/342
CLMTA-0
CLMTB-0
MCLSW-0
Signal Status
CLMTA-0 CLMTB-0
Wire cleaner “L” level “L” level OFF
drive motor “H” level “L” level Reverse rotation (Home position  limit)
“L” level “H” level Forward rotation (Limit  Home position)
“H” level “H” level Brake
Signal Status
“H” level “L” level
MCLSW-0 (Stop position switch) Not detected Detected
Wire cleaner
drive motor
Wire cleaner
Main charger wire
Wire cleaner
stop position
switch
Control section
Motor
driver
Gate
array
Main
CPU
Stop position switch input signal