Sharp AR-C172M (serv.man4) Service Manual ▷ View online
AR-C172M DESCRIPTIONS OF EACH SECTION 7 - 48
e. PS roller
f. Paper feed paper guide lower
Note: When assembling, check to insure that the paper feed
paper guide lower is set to the rib A and the boss B.
g. Paper feed paper guide upper
h. Paper exit roller
i. Gate solenoid
Note: When assembling, check to insure that the hook of the
paper exit gate is set in the concave section of the solenoid.
When assembling, check to insure that the D-cut surface of
the bearing faces downward.
the bearing faces downward.
2
1
1
1
1
1
1
2
B
A
1
2
2
1
1
1
Bearing
AR-C172M DESCRIPTIONS OF EACH SECTION 7 - 49
7. Operation panel
A. Operational descriptions
(1) Outline
The operation panel unit is composed of the operation key PWB,
the inverter/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 inverter/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 operation key PWB is connected to the ORS light receiving
PWB for detecting the document size. It receives light from the
ORS light emitting PWB attached to the rear frame, detecting the
document size.
PWB for detecting the document size. It receives light from the
ORS light emitting PWB attached to the rear frame, detecting the
document size.
(2) Electrical section and mechanical section
(3) major parts functions and operations
RW: Abbreviation of Related Wiring, which means the said load is specified in the related figure of the mechanical and the electrical sec-
tions.
CN4 (20pin)
CN1 (30pin)
CN3 (2pin)
CN2 (5pin)
Inverter/LVDS PWB
1
2
5
6
3
4
7
8
9
12
13
10
11
14
15
16
19
20
17
18
Vss (GND2)
NC
NC
Vss (GND2)
NC
NC
LCD_D3
LCD_D2
LCD_D1
LCD-VEE
3.3V
LCD_D0
Vss (GND2)
LCD-DIS
Vss (GND2)
LCD-CP2
LCD_M
LCD_S
FLS
Vss (GND2)
LCD_CP1
1
2
5
6
3
4
7
8
9
12
13
10
11
14
15
16
19
20
17
18
LCDS+
LCDS-
LCDCP1+
LCDCP1-
LCDM+
LCDM-
GND2
LCDCP2+
LCDCP2-
LCD-VCC
LCD-VEE
GND2
LCDDIS
LCDD0+
LCDD0-
LCDD1+
LCDD2-
LCDD3+
LCDD1-
LCDD2+
22
23
21
24
25
26
29
30
27
28
GND2
TH
LCDD3-
GND2
+24V
/CCFT
/YL
XH
FMZ
YH
/XL
1
2
3
4
/YL
FM
XH
YH
/XL
2
1
BH
HV
/CCFT
CN2 (6pin)
CN1 (26pin)
Operation key PWB
1
2
5
6
3
4
PDSEL0
PDSEL1
PD
GND2
PDSEL2
+5V
PH
1
2
5
6
3
4
7
8
9
12
13
10
11
14
15
16
19
20
17
18
GND2
SCAN0
SCAN3
SCAN4
SCAN1
SCAN2
SENSE0
SENSE1
SENSE2
SEG0\
SEG1\
SENSE3
SENSE4
SEG2\
SEG3\
COM0
FRDY
/BZR
COM1
COM2
22
23
21
24
25
26
PDSEL1
PDSEL2
PDSEL0
+5V
PD
GND2
FAZ
CN6 (6pin)
CN5 (26pin)
2
1
GND2
3
OCSW
4
+24V
5
/LED0
6
/LED1
+5V
CN3 (30pin)
MFP PWB
LCD unit
LCD
OCSW
ORS light
emitting PWB
emitting PWB
ORS light
receiving PWB
receiving PWB
Operation panel unit
Touch panel
Backlight
Document size
detection
detection
No.
Name
Code, signal name
Function
RW
Operation key PWB
—
Detects a pressed key on the operation panel.
RW
Inverter/LVDS PWB
—
Drives the LCD and the backlight, and controls the touch panel.
RW
ORS light receiving PWB
—
Receives light from the ORS light emitting PWB to detect the document size.
RW
ORS light emitting PWB
—
Emits light for detecting the document size.
RW
OC switch
OCSW
Timing switch for detecting the document size
AR-C172M DESCRIPTIONS OF EACH SECTION 7 - 50
B. Disassembly/assembly/maintenance
a. ORS light emitting PWB
1) Remove the upper cabinet rear cover and the upper cabinet
rear unit.
2) Remove the screw, and remove the document size sensor
unit. Remove the screw and the document size sensor, and
remove the ORS light emitting PWB.
remove the ORS light emitting PWB.
b. OCSW
1) Remove the upper cabinet rear cover and the upper cabinet
rear unit.
2) Remove the connector and the screw, and remove the
OCSW.
c. ORS light receiving PWB
1) Remove the FD connection cabinet, the front cabinet upper,
the FD paper exit port cabinet, and the operation panel plate.
2) Remove the connector and the screw, and remove the ORS
light receiving PWB.
d. Operation key PWB
1) Remove the FD connection cabinet, the front cabinet upper,
the FD paper exit port cabinet, and the operation panel plate.
2) Remove the screw, and remove A and B.
3) Remove the screw and the connector, and remove the opera-
tion unit.
4) Remove the screw and remove the operation key PWB.
e. Inverter/LVDS PWB
1) Remove the FD connection cabinet, the front cabinet upper,
the FD paper exit port cabinet, the operation panel plate, and
the operation panel unit.
the operation panel unit.
2) Remove the connector and the screw, and remove the
inverter/LVDS PWB.
B
A
AR-C172M DESCRIPTIONS OF EACH SECTION 7 - 51
8. External fitting
A. Disassembly
(1) Cabinet disassembly 1
1) Open the front cabinet.
2) Remove the front cabinet band. Pull out the slide pin (B), and
remove the front cabinet (C).
(2) Cabinet disassembly 2
1) Remove the front cabinet.
2) Open the left cabinet. Remove the screw and remove the front
frame cover.
(3) Cabinet disassembly 3
1) Remove the screw, and slide the paper exit tray cabinet right
to the right to remove.
(4) Cabinet disassembly 4
1) Remove the screw, and remove the rear cabinet (A). Remove
the screw, and remove the DC power CFM unit (B) and the
connector. Remove the screw, and remove the upper cabinet
rear cover (C).
connector. Remove the screw, and remove the upper cabinet
rear cover (C).
∗
When assembling, insert the boss in section D into the hole
in the frame.
in the frame.
(5) Cabinet disassembly 5
1) Remove the manual paper feed unit.
2) Pull out the cassette and the knob.
3) Open the front cabinet.
4) Remove the screw.
5) Lift the cabinet, and slide and remove the front right cabinet
(A) upward.
C
A
A
B
B
A
B
C
D
A
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