AR-M620 (serv.man16). (6b) Laser scan unit, Image process section, Scanner section, Fusing section, SPF section - Sharp Copying Equipment Service Manual (repair manual). Page 28

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AR-M550/M620  DETAILS OF EACH SECTION  6 - 87
[Main charger section]
A. General
The OPC drum surface is negatively charged in this section.
B. Major parts and signal functions
C. Maintenance and parts replacement 
(1) Maintenance and parts replacement
(Replacement parts)
a. Main charger unit
1) Remove the front door. 
2) Remove the process cover.
3) Loosen the screw.
No.
Name
Operation
1
Screen grid
Charges the OPC drum evenly. / Charges the OPC drum.
2
Saw teeth charging plate
Charges the OPC drum.
1
1
2
2
14
13
12
11
10
1
9
8
7
6
5
4
3
2
19
18
17
16
15
12
11
10
9
8
7
6
5
4
3
2
1
13
14
15
16
PCU PWB
MHV
THV
GB
PS-187(RD)
PS-187(YL)
Bias
PS-187(GR)
HV
CN-15
GND2
GND2
/GBPWM
/MHVREM
MHV-T
/THV+PWM
/CHV-PWM
/CHV-REM
/CHVACPWM
/CHVACREM
/DVPWM
/DVREM
HVREM
CN-1
B16B-PH-K-S
(NC)
GND2
GND2
/GBPWM
/MHVREM
MHV-T
/THV+PWM
/CHV-PWM
/CHV-REM
/CHVACPWM
/CHVACREM
/DVPWM
/DVREM
HVREM
+24V1
DSW-F
DSW-F
+24V1
(NC)
THV+REM
THV+REM
GND2
B34B-PHDSS-B
FPS-187(WH)
No.
Unit
Parts
a
Main charger unit
1
Screen grid
2
Saw teeth plate
3
MC cleaner
a-1
a
a-2
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