Board Unit (Schematics, Layouts & Parts); Main Unit - Vertex Standard VXA-150 Service Manual

3.3 V
0 V
(0.7 V) (0 V)
(1.9 V)
1.3 V
0.9 V
(1.3 V)
(0.9 V)
3.3 V
(0 V)
0 V
(0 V)
0 V
(6.9 V)
7.0 V
(6.9 V)
6.6 V
(0 V)
0 V 1.3 V
(0 V)
(3.0 V) 0.6 V
3.5 V
(0.4 V)
(3.1 V)
3.5 V
(2.5 V)
3.3 V 7.1 V
(0.4 V) (0 V)
0 V
6.6 V
(0 V)
(6.7 V)
1.5 V
3.3 V
(0 V)
(0 V)
0 V
(3.4 V)
3.5 V
(3.5 V)
1.8 V
(1.8 V)
7.0 V
(7.0 V)
7.3 V
(7.3 V)
3.5 V
(3.5 V)
3.4 V
(3.4 V)
3.4 V
SAVE ON: 3.5 V 3.5 V
(0 V) (3.5 V)
SAVE OFF: 0 V
(0 V)
(2.6 V)
0 V
0 V 0 V 0 V
(0 V) (1.7 V) (1.7 V)
0 V
(1.7 V)
0 V
0 V
0 V (1.7 V)
(1.7 V) (1.7 V)
1.0 V
(1.4 V)
6.4 V
(6.4 V)
4.7 V
(4.7 V)
3.6 V
(3.7 V)
0.9 V 4.3 V
(0 V) SQL OPEN: 3.4 V (4.4 V)
SQL CLOSE: 0 V
2.6 V
(3.5 V)
(0 V)
0 V
(3.4 V)
0 V
(0 V)
1.6 V
(1.6 V)
AM ANL OFF: 0 V
AM ANL ON: 3.5 V
3.3 V
(0 V)
0 V
(3.4 V)
0 V (0 V)
0 V (0 V)
0 V (0 V)
0 V (0 V)
0 V (0.6 V)
0 V (0 V)
0 V
0 V
(0 V)
(0 V)
1.4 V
(1.3 V)
1.7 V 3.5 V
(1.7 V) 3.3 V
(3.5 V)
(3.3 V)
0.4 V (0.6 V)
2.6 V
0.9 V (0 V)
0.9 V (0.9 V)
2.5 V
3.6 V
(2.6 V)
(3.7 V)
1.8 V
(1.8 V)
2.2 V
(2.2 V)
1.6 V
(1.5 V)
1.4 V
1.0 V
0.7 V
(1.5 V)
(1.0 V)
(1.3 V)
0 V
(3.7 V)
0.5 V
(0.4 V)
4.7 V
(0 V)
0 V
(0.6 V)
3.3 V
(3.3 V)
1.5 V
(1.4 V)
0 V
(0 V)
3.3 V (3.3 V)
1.4 V
(1.4 V)
0 V
0 V
(0 V)
(0 V)
0 V
(0 V)
1.5 V
(0 V)
1.5 V
(0 V)
1.5 V
0 V
FM: 0 V
(0 V)
(0 V)
1.5 V
(0 V)
(0 V)
1.5 V
1.5 V
(0 V)
(0 V) 1.5 V (0 V)
FM: 3.5 V
AM: 0 V
(0 V)
LAMP OFF: 3.5 V
LAMP ON: 0.2 V
(3.5 V)
LAMP OFF: 0 V
LAMP ON: 3.4 V
(0 V)
7.2 V
(6.9 V)
6.3 V
(6.3 V)
3.5 V
(3.5 V)
4.8 V 2.9 V
3.5 V 2.9 V
(4.8 V) (2.9 V)
(2.9 V)
(3.5 V)
2.9 V
3.5 V
(2.9 V)
(3.5 V)
6.7 V
(6.6 V)
3.5 V
(3.5 V)
0 V
(0 V)
0 V
6.9 V
(2.0 V) 0 V
(6.6 V)
(1.3 V)
0 V
(4.0 V)
0 V
(1.8 V)
1.2 V
(0 V) 0 V
6.9 V
(0.7 V)
0 V
(6.6 V)
(4.8 V) 6.4 V
(6.0 V)
0 V (0.8 V)
0 V
(2.1 V)
0 V (0.8 V)
0 V
(4.7 V)
4.8 V
(0 V)
4.6 V
(0 V)
4.0 V
(0 V)
4.5 V
FM: 1.7 V
3.2 V (0 V)
(0 V)
(0 V)
1.0 V
4.5 V
(0 V)
(0 V)
AM: 3.3 V AM: 1.5 V 4.5 V
FM: 0 V (0 V) (0 V)
(0 V)
1.1 V
(0 V)
1.2 V
(0 V)
0.7 V
4.8 V
(0 V)
(4.8 V)
3.3 V
(3.3 V)
1.1 V
(1.1 V)
0.6 V
(0.6 V)
2.9 V
(2.9 V)
6.5 V
(6.0 V)
4.9 V
(4.9 V)
3.5 V
(3.5 V)

MAIN Unit

Circuit Diagram
0 V
(1.6 V) 0 V
6.9 V
(0.9 V)
(6.6 V)
0 V
(0.8 V)
3.5 V
(0 V)
0.7 V
(0 V)
0.7 V
(0 V)
0.7 V
(0 V)
0.7 V
3.3 V (0 V)
(0 V)
RX (TX)
TRX Frequency: 120.000 MHz
RX Input Level: 40 dBµV with ±3.0 kHz @ 1 kHz tone
Audio Output Level: 400 mW
Supply Voltage: 7.2 V
17