Sharp AR-M550 (serv.man11) Service Manual ▷ View online
AR-M550/M620 DETAILS OF EACH SECTION 6 - 36
(2) Maintenance and parts replacement
(List of Replacement Parts)
a. Resist roller unit
1) Open the front door, and open the process cover. Remove the pro-
cess unit.
2) Remove the paper dust removing unit.
3) Remove the rear frame side cover, and disconnect the connector.
4) Remove the resist roller unit.
No.
Unit
Parts
a
Resist roller unit
1
Resist roller (Idle)
✕❍
2
Resis roller break clutch
✕❍
3
Transport roller 15
✕❍
4
Resist roller (Drive)
✕❍
5
Resist roller front paper
pass detector
pass detector
✕
b-1
a-1
a-2
a-4
a-3
a-5
a
AR-M550/M620 DETAILS OF EACH SECTION 6 - 37
a-1. Resist roller (Idle)
1) Remove the resist roller unit. (See “a. Resist roller unit” in this sec-
tion)
2) Remove the cover.
3) Remove the follower roller tension spring.
4) Remove the resist roller (Idle) unit.
5) Remove the bearing, and remove the E-ring, the gear, and the pin.
a-2. Resist roller break clutch
1) Remove the resist roller unit. (See “a. Resist roller unit” in this sec-
tion)
2) Remove the cover. (See “a-1. Resist roller (Idle)” in this section)
3) Remove the resist roller break.
4) Remove the E-ring and the resist roller break clutch.
b-3. Transport roller 15
1) Remove the resist roller unit. (See “a. Resist roller unit” in this sec-
tion)
2) Remove the front side cover.
3) Remove the E-ring, the gear, and the bearing.
4) Remove the coupling bearing on the rear side.
5) Remove the transport roller 15.
AR-M550/M620 DETAILS OF EACH SECTION 6 - 38
a-4. Resist roller (Drive)
1) Remove the resist roller unit. (See “a. Resist roller unit” in this sec-
tion)
2) Remove the follower roller and the tension spring.
3) Remove the cover on the front side.
4) Remove the transport roller 15.
5) Remove the paper guide.
6) Remove the E-ring, the gear, and the bearing.
7) Remove the coupling on the rear side.
8) Remove the resist roller (Drive).
a-5. Resist roller front paper pass detector
1) Remove the resist roller unit. (See “a. Resist roller unit” in this sec-
tion)
2) Remove the cover. (See “a-1. Resist roller (Idle)” in this section)
3) Remove the sensor.
b. Paper dust cleaner
1) Open the front cabinet. Open the process DV cover.
2) Remove the paper dust cleaner.
AR-M550/M620 DETAILS OF EACH SECTION 6 - 39
(Horizontal transport section)
A. Major parts and signal functions
14
13
12
11
10
9
8
7
6
5
4
3
2
1
6
5
4
3
2
1
6
5
4
3
2
1
6
5
4
3
2
1
6
5
4
3
2
1
3
2
1
3
2
1
MPFD2
MPRD1
MPRD2
LPPD
GND2
TXD-LCC
RXD-LCC
/DTR-LCC
/DSR-LCC
RES-LCC
/TRC-LCC
PHR-3
PHR-3
(NC)
B14B-PHDSS-B
CN-18
SMP-06V-NC/SMR-06V-N
+5V-MPFD2
GND2
MPFD2
+5V-LPPD
GND2
LPPD
+5V-MPFD2
GND2
MPFD2
+5V-LPPD
GND2
LPPD
GND2
MPFD2
+5V-LPPD
GND2
LPPD
+5V-MPFD2
GND2
MPFD2
+5V-LPPD
GND2
LPPD
GND2
MPFD2
+5V-LPPD
GND2
LPPD
SMR-06V-N/SMP-06V-NC
+5V-MPFD2
GND2
GND2
GND2
+5V-LPPD
LPPD
MPFD2
14
13
12
11
10
1
9
8
7
6
5
4
3
2
24
23
22
21
20
19
18
17
16
15
25
26
27
28
29
30
26
27
28
29
30
PCU PWB
CN-17
M2LUM
GND2
+24V1
/T1PFC
+24V1
+24V1
/M2PFC
+24V1
/DSKPFC2
GND2
GND2
TXD-FIN
RXD-FIN
RES-FIN
/DTR-FIN
/DSR-FIN
GND2
+5V2
/MM
MMCLK
MM-T
GND2
TANSET
+5V2
GND2
GND2
DSW-DSK
+5V2
(NC)
TSW-LED
TSW
(NC)
B30B-PHDSS-B
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
2
2
1
1
GND2
TH-DV
GND2
HUS-DV
MPRD2
GND2
+5V2
+5V-MPRD2
+5V-MPRD2
MPRD1
+5V-MPRD1
GND2
TSGOUT
GND2
TCS
+24V1
GND2
PPD
+5V2
DVCH4
DVCH3
DVCH2
DVCH1
+24V1
/PSBC
+24V1
+24V1
/T2PFC
+24V1
/HPFC
CN-12
B30B-PHDSS-B
/HPLS
+24V1
PHNR-02-H+BU02P-TR-P-H
/HPFC
HPFC
MM
5
6
2
3
1
4
5
4
3
2
1
S5B-PH-K-S
GND2
+5V2
/MM
MMCLK
MM-T
+5V2
/MM
MMCLK
MM-T
T1PPD
Code
Signal
name
Name
Function/Operation
Type
Model
Note
LPPD
LPPD
LCC paper pass detector
Detection of paper entry from LCC
Transmission
type
type
Paper transport system
sensor
sensor
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