10
March 2005 © TOSHIBA TEC e-STUDIO520/600/720/850 PROCESS RELATED SECTION
10 - 3
10.3 Charger Wire Cleaner Control Circuit
10.3.1 General description
The charger wire cleaner control circuit drives the main charger wire cleaner in a periodical reciprocat-
ing movement to clean the main charger wire, on purpose of eliminating defective or irregular charging
over the drum.
10.3.2 Configuration
The configuration of this control circuit is shown below.
• Wire cleaner drive motor:
Drives the wire cleaner in a reciprocating movement.
• Wire cleaner position detection switch:
Detects that the wire cleaner has reached to its home position (front side) or its stop position (rear
side).
• Control section (LGC board):
Outputs the drive signal to the wire cleaner drive motor and detects the input signal from the wire
cleaner position detection switch
Fig.10-2
Drive signal of wire cleaner drive motor
(L = Low level, H = High level)
Signal
Motor Status
WCLMTA-0A WCLMTB-0A
L L Off
H L Forward rotation (Stop position > Home position)
L H Reverse rotation (Home position > Stop position)
H H Brake
Input signal of wire cleaner position detection switch
Signal Low level High level
MCLSW-0A Cleaner detected
(Cleaner reached to its home position or its
stop position)
Cleaner not detected(During cleaning)
Wire cleaner position
detection switch
Main charger wire
Wire cleaner
Wire cleaner
drive motor
Main charger / wire cleaner drive unit
[Front]
[Rear]
LGC board
WCLMTA-0
WCLMTB-0
WCLMTA-0A
WCLMTB-0A
MCLSW-0A
IC9
Motor
driver
IC56
ASIC
IC58
Main CPU
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