Figure 3-1. Transmitter Pcb Schematic Diagram - Hitachi ATT-20 Installation, Operation, Troubleshooting

F1
B+ TP4
1-1/2 A
TL1
L3
C11
.01uf
D7
VSK130
POWER
TL2
R1
1K
R2
820K
R3
390K
D1 D2
LVA450 1N914
R10
5.1K
R9
3.3K
R11
8.2K
TL3
L2
B-
TL4
GND
Copyright 2019 SM 6299 Rev. 3, March 2019
TP2
R6
1328T
T1 1K
332T
Q1
2N3117
+ C1
1.0uf
R4
C2
R7
5.1K
.15uf
10K
R5
10K
R22
3.6M
TP1
Q7
2N3964
26T
T2 R12
258T
470K
D3
C3
1N914
TAB.
TP5

Figure 3-1. Transmitter PCB Schematic Diagram

Q2
2N3117
R15
1K
R8
10K
TP3
R14
R13 R16
C4
1M .22uf
33K 10K
L1
C5 R23
R17
10K
TAB. TAB.
Q3
2N3117
C12 R19
47uf 3.0K
3-3
ATT-20 Audio Track Transceiver
C10
.01uf
C7
47uf
Q4
2N3117
Q8
2N2270
Q5
2N6059
D4
1N914
T3
D5 R20
1N914 0.5 C8
C6
.47uf
C13
15T 26T
6.8uf
100uf
D8 R21
1N914 0.5
6T
D6
1N914
Q6
2N6052
R18
470
L5
SHUNT
J2
C9
TL6
TRACK
.47uf
L6
J1 COM
SERIES
TL5
TRACK