Sharp UP-3300 Service Manual page 67

8 7
RS232
D
VCC
R115
R102 R130
10K X3
FB34
RCVDT3_1
TXD3
FB35
/DTR3
C
FB36
/DSR3_1
/RTS3
FB38
/CTS3_1
100pF X3
C132 C151
C141
IC44A
IC44B
4 3 2
RCVDT3
74LV14 74LV14
IC44D
IC44C
8 9 6
/DSR3
B
74LV14 74LV14
IC44E IC44F
10 11 12
/CTS3
74LV14 74LV14
IC44 14PIN - - - VCC
7PIN - - - GND
A
8 7
6
VCC
C37
C221
10uF/16V
0.1uF
to PRINTER
CN20
CD3
1
RD3
2
BLM31 FB33 SD3
3
BLM31 ER3
4
BLM31 GND
5
DR3
6
BLM31 FB37 RS3
7
BLM31 CS3
8 RCVDT1
BLM31 CI3
9
10
53014-1010
/DSR1
VCKDC
1
RCVDT3_1
RCVDT2
5
/DSR3_1
/DSR2
13
/CTS3_1
VCC
C220
0.1uF
IC44 VCC---GND
6
5 4
/CI1 8
/CI1
C63
100pF
/DCD1 11
/DCD1
C70
100pF
-12V
+12V
IC2
1
TXD1 14
TXD1
RCVDT1 15
/DTR1 12
/DTR1
/CTS1 13
/CTS1
/RTS1
10
/RTS1
/DSR1 11
8
C74
C68
100pF
100pF
MC145406
IC3
1
TXD2
14
TXD2
RCVDT2
15
/DTR2 12
/DTR2
/CTS2
13
/CTS2
/RTS2
10
/RTS2
/DSR2 11
8
C75
C69
100pF 100pF
MC145406
3
/CI2
/CI2
C71
100pF
/DCD2
6
/DCD2
C64
100pF
IC4 14PIN - - - VCC
7PIN - - - GND
5 4
3 2
C66
330pF
9
FB25
10
BLM31
IC4C
75189
C72
1 330pF
2
FB6
13
BLM31
IC4D
75189
VCC
16
FB17
3
FB10
BLM31
2
FB23
BLM31
5
FB20
BLM31
4
FB14
BLM31
7
FB1
BLM31
6
9 BLM31
16
FB18
3
FB11
BLM31
2
FB24
BLM31
5
FB21
BLM31
4
FB15
BLM31
7
FB7
6 BLM31
BLM31
9
C73
330pF
2
FB26
1
BLM31
IC4A
75189
C67
330pF
5
FB2
4
BLM31
IC4B
75189
2
3
1
7/16
D
C
CN18
GND 5
CI1 9
ER1 4
CS1 8
SD1 3
RS1 7
RD1 2
DR1 6
CD1 1
SDEB-9P
D-SUB 9PIN
CN19
GND 5
CI2 9
ER2 4
CS2 8
SD2 3
B
RS2 7
RD2 2
DR2 6
CD2 1
SDEB-9P
D-SUB 9PIN
A
1