Service manual

8 7 6 5 4
3
2 1
A B
C D
12345678
D C
B A
RS232
1
2
3
SW2
SSSS312
R9
0
C63 100pF
/CI1
/DCD1
/CI1 /DCD1
VCC
PF1
POLY SW
C58 330pF
FB22
BLM31
C49 330pF
10 8
9
IC3C SN75189
13 11
1 2
IC3D SN75189
FB19
BLM31
C52 100pF
RCVDT1
/DSR1
RCVDT2
14 15 12 13 10 11 8 116
3 2 5 4 7 6 9
IC2
MC145406
/RTS1
+12V -12V
/CTS2
/CTS1
TXD1
/DTR1
TXD2 /DTR2
/CTS1 /DTR1 /DSR1 /RTS1 /CTS2 /DTR2 TXD1 TXD2
RCVDT1 RCVDT2
VCC
14 15 12 13 10 11 8 116
3 2 5 4 7 6 9
IC4
MC145406
FB18
BLM31
FB30
BLM31
FB23
BLM31
FB29
BLM31
FB32
BLM31
FB28
BLM31
C61
100pF
C56
100pF
GND CI1 ER1 CS1 SD1 RS1 RD1 DR1 CD1 GND CI2 ER2 CS2 SD2 RS2
CHANNEL 1
CHANNEL 8
FOR DSUB 9PIN
FOR DSUB 9PIN
FB24
BLM31
FB17
BLM31
FB27
BLM31
9 8 7 6 5 4 3 2 1
CN4
MLX 53014-0910
9 8 7 6 5 4 3 2 1
CN58
MLX 53014-0910
FB26
BLM31
FB25
BLM31
RD2 DR2 CD2
FB31
BLM31
7PIN - - - GND
IC3 14PIN - - - VCC
C69
100pF
/RTS2
/CI2
/DCD2
/DSR2 /RTS2
/CI2 /DCD2
FB20
BLM31
FB21
BLM31
C57 330pF
C48 330pF
1 3
2
IC3A SN75189
4 6
5
IC3B SN75189
C62 100pF C51 100pF
C71
100pF
/DSR2
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