Charger Wire Cleaner Control Circuit - Toshiba e-STUDIO520 Service Manual

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
[Front]
Main charger / wire cleaner drive unit
Wire cleaner position
Wire cleaner
detection switch
drive motor
Wire cleaner
WCLMTA-0A
WCLMTB-0A
Drive signal of wire cleaner drive motor
(L = Low level, H = High level)
Signal
WCLMTA-0A WCLMTB-0A
L
H
L
H
Input signal of wire cleaner position detection switch
Signal
MCLSW-0A Cleaner detected
(Cleaner reached to its home position or its
stop position)
March 2005 © TOSHIBA TEC
[Rear]
LGC board
Main charger wire
Fig.10-2
L Off
L Forward rotation (Stop position > Home position)
H Reverse rotation (Home position > Stop position)
H Brake
Low level
10 - 3
MCLSW-0A
IC56
ASIC
IC9 WCLMTA-0
WCLMTB-0
Motor
driver
Motor Status
High level
Cleaner not detected(During cleaning)
e-STUDIO520/600/720/850 PROCESS RELATED SECTION
10
IC58
Main CPU