AR-M550 (serv.man11). (6a) List of sections, Operation panel section, Paper feed transport duplex exit revserse sections. - Sharp Copying Equipment Service Manual (repair manual). Page 3

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AR-M550/M620  DETAILS OF EACH SECTION  6 - 3
C. Maintenance and parts replacement
(List of Replacement Parts)
(1) Maintenance and parts replacement
a. Operation panel unit
1) Remove the table glass.
2) Remove the operation section cover.
3) Remove each cable.
4) Remove the ground lead.
5) Remove the operation panel unit.
Code
Signal 
name
Name
Function/Operation
Type
Model
Note
LCD
LCD unit
Display the each memu and the information.
TOUCH
Touch panel
Various adjustments and setting operation are 
performed.
ORSLED
Document size detection light 
emitting PWB
Generates the document size detection signal.
ORSPD
Document size detection light 
receiving PWB
Generates the document size detection signal.
OCSW
OCSW
SPF open/close detector
Document size detection trigger
Transmission type
Sensor
/CCFT
/CCFT
LCD backlight
LCD backlight
CCFT cool CRT
No.
Name
Function
1
LVDS/INV PWB
Generates the LCD display signal and a high voltage for the backlight. 
2
Operation control PWB
Controls the display operation panel. 
No.
Unit
Parts
a
Operation panel unit
1
Operation control PWB
2
LVDS/INV PWB
b
LCD unit
1
Touch panel
a-2
a-1
a
b-1
b
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