NOTE STi600, STi400 Schematic
I/P - A
I/P + A
I/P 0V
R1
3k3
R2
3k3
C1
82p
C2
33p
C3
33p
R3
10k
R4
3k3
3k3
R5
10p
C4
R6
6k2
C5
4p7
CMRR
+15
RV1
1k
2
3
8 4
-15
1
IC1A
NE5532
C6
100u
R7
220R
BOTTOM
WIPERTOP
C7
100u
R8
10k
6
5
C20
15p
R9
120k
IC1B
NE5532
NOTE
CIRCUIT SHOWN APPLIES TO ST600
FOR ST400 TR4 & TR8 ARE NOT FITTED AND
R10 = 12k
R19 & R20 = 30k
R36
7
110k
BRIDGE OUT
0dB Sensitivity Modification
Change R5 from 3k3 to 6k65
Change R6 from 6k8 to 13k
F
E
C8
10u
DMOD1
IN4148
x2
R10
10k
C9
4p7
R12
68k
3
2
R11
1k
+15
-15
7
4
R13
10k
BIAS
RV2
1k
C18
100n
IC2
NE5534
6
C10
100p
C19
100n
R14
10k
R15
150R
R16
150R
C11
100u
D2
IN4148
TR10
BC184L
ZD2
9v1
TR9
BC214L
ZD1
9v1
D1
IN4148
R18
5k1
R17
5k1
R21
5k1
R22
5k1
SEE NOTE
D4
IN4148
D3
IN4148
R19
39k
SEE NOTE
R20
39k
C13
deleted
560R
C61
680p
C60
680p
R120
8k2
R27
R121
8k2
deleted
C12
C71
10p
TR5
K1058
D41
IN4004
RMOD
390k
D40
IN4004
TR1
J162
R23
560R
560R
R28
TR6
K1058
C70
10p
TR2
J162
R24
560R
560R
R29
TR7
K1058
TR3
J162
R25
560R
C69
10p
R30
560R
CMOD
220p
1kV
J162
R26
560R
TR8
K1058
TR4
C68
10p
D6
IN4004
C14
4700u
D5
IN4004
FS1
T10A
FS2
T10A
R31
10k
R35
10R
R32
10k
2.5W
2.5W
C16
47n
C15
4700u
2.5W 2.5W
R33
10R
2.5W
L1
CHOKE
R108
10R
C17
22n
-VE A
+VE A
R34
10R
RL1
RL4
OP/A
+15
D9
IN4148
OP/A 0V
C/T A
RLY CNTRL
D
C
B
OP/A MON
Title
A3
Date: 1-Jul-1999 Sheet of
ST 600/400 PCB
Number RevisionSize
C1022
A
3
3 4
I/P - B
I/P + B
I/P 0V
R37
3k3
R38
3k3
C21
82p
C22
33p
C23
33p
R39
10k
R40
3k3
R41
3k3
C24
10p
R42
6k2
C25
4p7
CMRR
+15
IC3B
NE5532
RV3
1k
7
C26
100u
R43
220R
4
5
6
8
-15
WIPERTOP
BOTTOM
BRIDGESTEREO
INOUT
C27
100u
R44
10k
3
2
IC3A
NE5532
120k
84
C28
15p
R45
NOTE
CIRCUIT DIAGRAM SHOWN APPLIES TO ST600
FOR ST400 :
TR14 & TR18 ARE NOT FITTED
R46 = 12k
R55 & R56 = 30k
1
0dB Sensitivity Modification
Change R41 from 3k3 to 6k65
Change R42 from 6k8 to 13k
F
E
C29
10u
DMOD2
1N4148
x2
R46
10k
C30
4p7
R47
68k
3
2
R48
1k
+15
7
4
R49
10k
BIAS
RV4
1k
C31
100n
IC4
NE5534
6
C32
100p
C33
100n
R50
10k
R52
150R
R51
150R
C34
100u
D11
IN4148
BC184L
BC214L
ZD3
9v1
D10
IN4148
TR20
ZD4
9v1
TR9
R54
5k1
R53
5k1
R57
5k1
R58
5k1
SEE NOTE
IN4148
D12
IN4148
SEE NOTE
Deleted
R56
39k
D13
R55
39k
C36
C63
680p
560R
R122
C62
680p
R123
8k2
R63
8k2
C67
10p
TR15
K1058
D42
IN4004
RMOD
390k
IN4004
D43
R59
560R
R64
560R
C66
10p
TR11
J162
TR16
K1058
TR12
J162
R60
560R
R65
560R
C65
10p
TR17
K1058
TR13
J162
R61
560R
R66
560R
CMOD
220p
1kV
R62
560R
C64
10p
J162
TR18
K1058
TR14
D15
IN4004
C37
4700u
D14
IN4004
FS4
T10A
C38
4700u
R69
10R
R67
10k
2.5W
R68
10k
2.5W
C39
47n
R70
10R
2.5W
L2
CHOKE
R109
10R
2.5W2.5W
C40
22n
+VE B
R71
10R
RL2
RL4
OP/B
+15
D18
IN4148
OP/B 0V
C/T B
RLY CNTRL
D
C
B
OP/A MON
-15
Deleted
C35
FS3
T10A
Title
A3
Date: 1-Jul-1999 Sheet of
STi 600/400 PCB
Number RevisionSize
C1022
-VE B
A
3
2 4
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