Samsung ML-4600/XET Service Manual page 95

Schematic Diagrams
Main Circuit Diagram(7/9)
SMPS
5V
CN3-1
1
2
C167
3
100uF
4
5
6
7
8
9
10
11
12
13
14
15
5V
HVPS
CN2-1
1
2
3
4
5
6
7
8
9
C178
100nF
GND24
PAPER SENSOR
CN6-1
1
2
3
4
Samsung Electronics
24V
+24VS
C106 C111
C109
100nF 100nF
16V
100nF
GND24 GND24
FUSER_ON
P_EXIT*
GND24
+24VS 5V 5V 5V 5V 5V
D7
U40-3
R74 R78
R75 R76
74F14
C177 10K 10K 10K
10K
100nF
MMSD914T1
6
5
R101 33K
U40-4
74F14
8
9
U40-5
74F14
10
11
MMSD914T1
C65 C66
C46 D6 C14 C47
1nF 1nF 1nF
1nF 1nF
5V
P_EMPTY*
FEED_SENSOR*
C110 C113
C179
100nF 100nF
100nF
+24VS
R35
5.1K
R96
1.2K
DCU_DIN
THV_PWM
THV_EN*
THVREAD
DCU_DOUT
DCU_CLK
MHV*
BIAS_PWM
PTL
CN4-1
35303-0250
5V
D1
RB420D T147
TnRST
COVER_OPEN TDI
TMS
C21
TCK
1nF
TDO
5V
TO DCU
R39 R38
5.1K 5.1K
1
CN9-1
2
CN9-2
3
CN9-3
4
CN9-4
C149 C148
100pF 100pF
5V
R32
33
Q2
1
KSC1623-G
2
R110
3
100
1
PTL
2
C180
C181
100nF
100nF
5V 5V 5V
R14 R24 R25
10K 10K 10K
R47
0
10-7