Xerox Phaser 3120 Service Manual page 79

SCHEMATIC DIAGRAMS
HVPS Circuit Diagram (2/2)
5V
D401
1N4148
MHV-sen
MHV-PWM
CON2-19 R401 R402
47K 22K
C401 C402 D402
473 102 1N4148
5V
D501
1N4148
BIAS-sen
BIAS-PWM
R502
R501 22K
CON2-20
47K
C501 C502
D502
473 102
1N4148
U103
KA7805
24VS
IN
+
C112
50V 10uF
Service Manual
8-16
C404
R403
1.5M
472
R406
Q401
5.6K
A708-Y
12
+
14
13
R404
-
U102-D
10K
KA324
C403
331
R405
10K
Q402
C945C-Y
C504
R503
330KF
472
R506
Q501
5.6K
A708-Y
10
+
8
9
R504
-
U102-C 10K
KA324
C503
R505
681
10K
Q502
C945C-Y
5V
OUT
C113
+
25V 47uF
24VS
ZD401
2.7V
C406
R407 103
100K
R408
C405
470
104
C407
Q403
103
C2316
D403
D1NL20U
ZD402
2.7V
R409
1/4W 4.7
24VS
ZD501
2.7V
C506
103
R507
100K
R508
C505
470
104
C507
Q503
103
C2316
D503
R509
D1NL20U
ZD502
1/4W 10
2.7V
D404
R410
IT401
4KV
1/2W 560K
4
C409
2 ¡
6
3KV 471 R411
MGR1/2W 20MF
5 ¡ 7
1 ¡
MHV-sen
IT-01
R412
5V
30KF
C410
C408 221
103
MHV
20K
D504
IT501 R510
4KV
1/2W 1.8M
4
R511
2 ¡
C510
6
C509
3KV 101
3KV 471
7
5 ¡
1 ¡
BIAS-sen
IT-01
5V
R512
30KF
R515
C508
MGR1/2W 15MF
103
DEV
20K
MHV
R413
1/2W 100K
R414
MGR1/2W 15MF
OPC
ZD403
130V
SUPPLY
R513
1/2W 50K
ZD503
200V
DEV
R514
1/2W 50K