Read Sharp AR-M550 (serv.man12) Service Manual online
AR-M550/M620 DETAILS OF EACH SECTION 6 - 74
[OPC drum section]
A. General
In this section, laser beams are radiated to the OPC drum surface
which was negatively charged, making electrostatic latent images.
which was negatively charged, making electrostatic latent images.
B. Major parts and signal functions
Code
Signal
name
Name
Function/Operation
Type
Model
Note
DMS
DMS
OPC drum marking sensor signal
OPC drum mark detection
Reflection type
Analog detector
PCS
PCS
Image density sensor
Detection of density of toner patch on the OPC
drum
drum
Reflection type
Analog detector
TH-CL
TH-CL
OPC drum cleaner temperature
sensor
sensor
OPC drum cleaner peripheral temperature
detection
detection
Thermistor
Analog detector
DM
DM
OPC drum motor
Drives the OPC drum and the transfer section.
DC brushless
motor
motor
PSPS
PSPS
Drum separation pawl solenoid
Drives the OPC drum separation pawl
Solenoid
DL
DL
Discharge lamp
Discharges electric charges on the OPC drum.
Lamp
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
PCS-LED
PCS
DMS-LED
DMS
/DL
/PTDL
/PSPS
HUS-TC
GND2
TH-CL
GND2
TLS
GND2
B20B-PHDSS-B
/PWM-RSV1
+24V1
+5V2
+24V1
+12V2
+12V2
+12V2
CN-8
+24V-DL
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
16
15
14
12
11
10
PCU PWB
B18B-PHDSS-B
CN-6
GND2
GND2
/DM
DMCLK
DM-T
+5V2
GND2
/DVM
DVMCLK
DVM-T
+5V2
GND2
+5V2
/FUM
FUMCLK
FUM-T
+24V1
/VFM-BKR
AC PWB
5
4
3
2
1 GND2
/DVM
DVMCLK
DVM-T
DVMCLK
DVM-T
B2PS-VH
S5B-PH-K-S
+5V2
+38V
+38V
GND1
GND1
+38V
GND1
2
1 +38V
GND1
CN-5
B16B-PADSS-1
PCS
DMS
DL
TH-CL
9
8
7
6
5
4
3
2
1
9
8
7
6
5
4
3
2
1
20
19
18
17
16
15
14
13
12
11
10
20
19
18
17
16
15
14
13
12
11
10
4
3
2
1
2
1
1
2
2
2
3
2
1
2
3
2
1
1
3
1
3
3
2
1
/PSPS
GND2
TH-CL
(NC)
(NC)
(NC)
PCS-LED
PCS
PCS
DMS-LED
DMS
DMS
/DL
/PTDL
/PSPS
TH-CL
GND2
TH-CL
GND2
(NC)
(NC)
+24V1
+24V1
+24V1
S4B-PH-K-S
DRAWER
TSDR-20V-K/TSDP-20V-K
+12V2
+12V2
(NC)
(NC)
(NC)
SRA-01T-3.2
SRA-01T-3.2
GND2
+24V-DL
SMP-02V-BC/SMR-02V-B
PCS
DMS
SMR-03V-B/SMP-03V-BC
SMR-03V-B/SMP-03V-BC
+12V2
PCS-LED
+12V2
DMS-LED
PHR-3
+24V-DL
/DL
(NC)
PROCESS UNIT
DM
1
2
3
4
5
7
6
PSPS
8
9
No.
Name
Operation
1
OPC drum
Forms electrostatic latent images by laser beams.
2
Cleaning blade
Cleans remaining toner on the OPC drum.
3
CL brush roller
Cleans remaining toner on the OPC drum.
4
Sub blade (Cleaning seal)
Prevent against toner leakage from the cleaner section.
5
Side seal F, R
Prevents against toner dispersion.
6
Drum separation pawl
Separates paper from the drum.
7
Separation pawl oscillation shaft
Moves in the front and rear frame direction to install the separation pawl.
8
Waste toner transport screw
Transports toner from the cleaner unit to the waste toner transport pipe.
9
Waste toner transport pipe
Transports toner from the cleaner unit to the waste toner box in the toner cartridge front section.
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