MX-1800N (serv.man22). Details of each Section - B Operation Panel Section. - Sharp Copying Equipment Service Manual (repair manual). Page 2

MX-1800N  OPERATION PANEL  B – 2

The operation panel unit is composed of the MFP OPE-P PWB, the
LCD INV PWB/LVDS PWB, the LCD unit, and the operation keys,
and is used to operate the machine and to set and display the
machine status.
The MFP OPE-P PWB is connected to the document detection light
receiving PWB for detecting the document size. It receives light
from the document detection light emitting PWB attached to the
rear frame, detecting the document size.
The power switch of the operation panel supplies the ON/OFF con-
trol signal of the DC power source.

1)

Remove the paper exit cover and the upper cabinet left.

2)

Remove the front cabinet upper and the operation panel base
plate.

3)

Remove each cables and the grounding sheet.

4)

Remove the operation panel unit.

b. LVDS PWB
1)

Remove the operation panel unit.

2)

Remove the LCD INV PWB (A). Remove the LVDS PWB (B).

OCSW

Original cover SW

Timing switch for document size detection

PWRSW

Operaton panel power supply switch

Outputs the DC power supply ON/OFF control signal.

1

MFP OPE-P PWB

Detects the key pressed on the operation panel.

2

LCD INV PWB/LVDS PWB

Drives LCD and the backlight, and controls the touch-panel.

3

Document detection light receiving PWB

Receives the light from the document detection light emitting PWB, and detects the document size.

4

Document detection light emitting PWB

Emits light for document size detection.

(1)

Operation panel unit

a

LCD INV PWB

b

LVDS PWB

c

LCD module

d

Touch panel

e

POWER SW PWB

f

MFP OPE-P PWB

(1)-e

(1)-f

(1)-a

(1)-d

(1)-c

(1)-b

(1)

B

A