Opc Drum Section] - Sharp MX-M350 Service Manual

[OPC drum section]

A. General
In this section the laser beam expose's the drum. The latent image
is formed on the OPC drum. Then is sent to the development unit.
B. Major parts and signal functions
DM
SRA-21T-4L
SRA-21T-3
SRA-21T-4L
SRA-21T-3
Signal
Code
name
DM DM OPC drum motor
PSPS PSPS Drum separation pawl solenoid Drives the OPC drum separation pawl
No. Name
1 OPC drum
2 Drum separation pawl
3 Sub blade (Cleaning seal)
4 Screen grid
5 Saw-teeth charger
6 Separation pawl oscillation shaft Moves in the front and rear frame direction to install the separation pawl.
7 Cleaning blade
8 Waste toner transport pipe
9 Cleaning unit
MX-M350/M450 N/U MAINTENANCE AND DETAILS OF EACH SECTION 7 - 6
8FE-BT-VK-N
DSW-L 8
DSW-L 7
GND2 6
GND2 5
DM\
4
DM-T
3
DMCLK\
2
(NC)
1
PHNR-02-H+BU02P-TR-P-H
PSPS\
2
PSPS
+24V1
1
3
2
1-84432-4(AMP)
DSW-F
PS-187
RD
GND2
MHV RD
GND2
PS-187
DHVREM
WH
THV WH
MHVREM\
THV+PWM\
PS-187
GBPWM\
WH
HV
GB
YL
DHVPWM\
PS-187 THV-PWM\
RD
DHV BL DVREM\
DVPWM\
PS-187
THVREM\
DV
BIAS GR
MHV-T
THin
Name
Drives the OPC drum and the transfer section. DC brushless motor
Forms electrostatic latent images by laser beams.
Separates paper from the drum.
Prevents against toner leakage from the cleaner section.
Helps to charge the OPC drum evenly with electric charges provided from the main charger.
Applies a high voltage to charge the OPC drum.
Cleans remaining toner on the OPC drum.
Transports toner from the cleaner unit to the waste toner box in the toner cartridge front section.
Saw teeth charger is cleaned.
1
2
9
4
5
7
2
1
CN15
9604S-14F
1 1 DSW-F
2 2 GND2
3 3 GND2
4 4 DHVREM
5 5 MHVREM\
6 6 THV+PWM\
7 7 GBPWM\
8 8 DHVPWM\
9 9 THV-PWM\
10 10 DVREM\
11 11 DVPWM\
12 12 THVREM\
13 13 MHV-T
14 14 THin
Function/Operation
Operation
6
8
CN5
B8B-PH-K-S
GND2
1
+5V2
2
CRUCLK
3
CRUSDA
4
PSPS\
5
+24V1
6
(NC)
7
+24V1 8
PCU PWB
CN6
9604S-08C
DSW-F 1
DSW-F 2
GND2 3
GND2
4
DM\
5
DM-T
6
DMCLK\
7
(NC)
8
Type
Solenoid
Note