Sharp AR-M455N

AR-M355N/M455N MAINTENANCE AND DETAILS OF EACH SECTION 7 - 64
C. Maintenance and parts replacement
a. Original detection unit
a-1. Original size detection PWB (Light emitting side)
1) Remove the rear cabinet.
2) Remove the original detection unit (Light emitting side).
3) Remove the document size detection PWB (Light emitting
side)
a-2. Original size detection PWB (Light receiving side)
1) Remove the operation panel lower cabinet.
2) Remove the original size detection PWB (Light receiving side)
b. Operation panel unit
1) Remove the original exit tray.
Code
Signal
name
Name Function/Operation Type 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 Original detection
unit
1 Original size detection PWB
(Light emitting side)
2 Original size detection PWB
(Light receiving side)
b Operation panel
unit
1 LVDS PWB
2 MFP operation PWB
a-1
b-2
b-1
a-2
b
1)
2)
3)
4)
1)
1)
1)
2)
3)
3)
2)
1)
2)
2)
1)
2)