Read Sharp AR-M351U / AR-M451U (serv.man11) Service Manual online
AR-M351U/M451U, AR-M355U/M455U MAINTENANCE AND DETAILS OF EACH SECTION 7 - 6
[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
DM
PSPS
+24V1
PSPS\
1
1
2
2
PHNR-02-H+BU02P-TR-P-H
8FE-BT-VK-N
DSW-L
DM-T
DM\
5
6
DSW-L
GND1
3
2
1
4
GND1
DMCLK\
(NC)
8
7
PCU PWB
1
2
3
4
5
6
7
8
DM-T
GND2
DM\
CN6
GND2
DSW-F
DSW-F
DMCLK\
9604S-08C
(NC)
1
2
3
4
5
6
7
8
CN5
+24V1
CRUCLK
+5VCRU
GND2
CRUSDA
PSPS\
(NC)
B8B-PH-K-S
+24V1
1
DVREM\
DHVREM
MHVREM\
THV+PWM\
6
4
13
14
12
GND2
3
7
8
9
10
5
GBPWM\
11
CN15
DSW-F
THin
DHVPWM\
THV-PWM\
THVREM\
2
DVPWM\
9604S-14F
GND2
MHV-T
RD
GR
BL
YL
WH
HV
1
DVREM\
DHVREM
MHVREM\
THV+PWM\
6
4
13
14
12
GND2
3
7
8
9
10
5
GBPWM\
11
DSW-F
THin
DHVPWM\
THV-PWM\
THVREM\
2
DVPWM\
1-84432-4(AMP)
GND2
MHV-T
PS-187
SRA-21T-4L
BIAS
PS-187
PS-187
PS-187
WH
WH
MHV
THV
GB
DHV
DV
RD
PS-187
SRA-21T-3
SRA-21T-4L
RD
SRA-21T-3
8
3
1
2
2
5
4
9
7
6
Code
Signal
name
Name
Function/Operation
Type
Note
DM
DM
OPC drum motor
Drives the OPC drum and the transfer section.
DC brushless motor
PSPS
PSPS
Drum separation pawl solenoid
Drives the OPC drum separation pawl
Solenoid
No.
Name
Operation
1
OPC drum
Forms electrostatic latent images by laser beams.
2
Drum separation pawl
Separates paper from the drum.
3
Sub blade (Cleaning seal)
Prevents against toner leakage from the cleaner section.
4
Screen grid
Helps to charge the OPC drum evenly with electric charges provided from the main charger.
5
Saw-teeth charger
Applies a high voltage to charge the OPC drum.
6
Separation pawl oscillation shaft
Moves in the front and rear frame direction to install the separation pawl.
7
Cleaning blade
Cleans remaining toner on the OPC drum.
8
Waste toner transport pipe
Transports toner from the cleaner unit to the waste toner box in the toner cartridge front section.
9
Cleaning unit
Saw teeth charger is cleaned.
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