Samsung SCX-1100 Service Manual page 104

Main Circuit Diagram (7/8)
1
A
C149
100nF
3.3V
C138
22uF
16V
B
C135
1nF
DGND
3.3V
R109
10K
_MODEM_IRQ
_MODEM_RST
C
R122
4.7K
DGND
D
11.75V 11.75VA
BD9
CIM21J121NES
C156
22uF
25V
C169
100nF
AGND
E
1
Samsung Electronics
2 3
5V
L4 10uH
C155 C157
100nF 100nF
C150
C134
22uF
100nF
16V
AGND
DGND
C137 C146 C136
100nF 100nF 100nF
C147 C133 C145
100nF 100nF 100nF
DATA(0:7)
ADDR(0:4)
Q3
U19
2SC2812L6-TA
5V _RD
_WR
R112 10K FM336R6719-12
_MODEM_CS
R113
10K
DGND
C148
100nF
DGND
R110
100
X2
28.224MHz
C122 C123
27pF 27pF
DGND AGND DGND
U23-4
MC14053BD
TONE_OUT
C214
R379 1M C132 100nF
KEYCLICK
TONE_CTL
D7
MMSD914T1
C166
1nF
DGND
KEYTONE
DGND
2 3
4
MODEM_TX2
MODEM_TX1
C174 100nF R133 47K
MODEM_RX
+3.0V
D4
U23-2
MMSD914T1
5V
MC14053BD
C183 100nF
R372 R114 R121
10K 10K 10K
DGND
C144
1nF
DGND
U23-3
MC14053BD
C154
1nF
+3.0V
D6
MMSD914T1
5V
C213 1nF R165
10K
R166 150K
5V _SPK_CTL
C210
1nF
DGND
SPK_OUT+
100nF R167 47K
SPK_OUT-
C211
1uF
U34
C212 MC34119DR2
1uF
+3.0V DGND
(Unused)
4
- This Document can not be used without Samsung's authorization -
5 6
C175 1nF
+3.0V R132 91K
R131 330K C188 100nF
C189 1nF
KA358D-T/F
R143 130K
U25-2
11.75VA
C173
+3.0V
100nF
U25-1
RX
KA358D-T/F
C185 100nF R140 3K AGND
C184 100nF R139
RX_CTL
AGND C186 1nF
+3.0V
R142 300K
U24-2
KA358D-T/F
C187
R141
100nF
47K
R130 120K C171
TX
DGND
5V
C206
100nF
AGND
R159 4.7K C199 100nF
5V
11.75VA +3.0V
U23-1
MC14053BD
11.75VA
R127
U24-1
24K
KA358D-T/F
C170
100nF
C172 R129
100nF 8.2K
C167
C168
10uF
100nF
16V
AGND
AGND
AGND
AGND AGND
ED. 1 01.08.06
DATE
SIGN
C
A E
H
R N
E
P G
C
. .
K
REF NO SEC
5 6
SCHEMATIC DIAGRAMS
7
A
TX
120K
REMOTE
B
100nF
RX
TX_CTL
C
TONE_OUT
VOL_0
VOL_1
VOL_2
D
E
2 3
D SCX-1100
W Main Board
G
REV 0.2
.
MODEM
7/8
Repair Manual
4-7