Samsung ML-1200 Series Repair Manual page 20

3.3 HVPS Circuit Diagram (1/2)
5V
R411
R422
2.2K
5.6K
MHV-PWM
3 4
CN1-#6
U2-B
7407
5V
R501
5.6K
BIAS-PWM
1 2
R502
CN1-#7
U2-A
2.2K
7407
CN1
GIL-S-9P-S2T2-EF
1
2
3
4
5
6
7
8
9
Samsung Electronics
18V
R401
100
R405
220KF
R403 R404
110KF 33K
Q401
A708-Y
D111
1N4148
R402
56KF
R412
2K C408 C401
104
222 R406
2.2KF
VR401
50K
18V
R503 R508
100
86.6KF
Q501
A708-Y
R507
27K
R505
100KF R506
C501
100KF
104
R504 C502
2K 222 R509
12KF
VR501
50K
24VS
U3
24VS
KA7818
A-GND
THV-PWM
THV-EA IN OUT
THV-READ
GND
MHV-PWM
BIAS-PWM C1
104
5V
D-GND
- This Document can not be used without Samsung's authorization -
24VS
C402 R407
103 240K
T401
KAB-006
1 7
12
Q402
+
14 5 6
D526-Y
13 2
C405
-
2KV 680
R408
U1-D
47K
KA324
4
R409
430
C403
R410
333
1W 3
D403
1N4148
24VS
T501
KAB-006
1
R510
C503
47K
104
Q502
5
D526-Y
2
9
-
8 4
10
+
R511 R512
U1-C
47K 430
KA324
R513
C504
D501 1W 3
333
1N4148
18V
+
C2 C3
35V 47uF
104
D401
C404
R426
4KV
3KV 471
MGR1/2W 100KF
R413
MGR1/2W 6MF
C406
3KV 471 R416
D402
MGR1/2W 15MF
4KV
R414
MGR1/2W 6MF
ZD401
R417
1W 130V
MGR1/2W 15MF
D502
R516
R514
4KV
MGR1/2W 50K
MGR1/2W 15MF
7
6
C506
ZD501
3KV 471
C505
1W 100V
2KV 680
R515
R519
MGR1/2W 15MF
MGR1/2W 50K
R517
MGR1/2W 15MF
SAMSUNG ELECTRONICS TITLE
DESIGNED CHECKED APPROVED DRW. NO
REF. NO
JH.CHO
SIZE A4
SCHEMATIC DIAGRAMS
MHV
OPC
SUPPLY
DEV
SWALLOW-HVPS
REV.
1.0
JC
DATE 01/01/04 1 OF 2
Repair Manual
3-15