Vertex Standard VX-4200 Series Service Manual page 15

RX: 2.8 V
TX: 0 V
–121.0 dBm
RX: 1.2 V
TX: 0 V
–120 dBm
RX: 0 V
RX: 0 V
TX: 1.6 V
TX: 8.0 V
PWR OFF: 0 V
PWR ON: 13.6 V
8.0 V
RX: 4.9 V
RX: 7.6 V TX: 0 V
TX: 7.4 V
13.6 V
RX: 0 V
TX: 8.0 V RX: 0 V
TX: 8.0 V
RX: 0 V
TX: 4.8 V
RX: 2.0 V
TX: 0.4 V
PWR OFF: 0.5 V
PWR ON: 5.0 V
COMP OFF: 5.0 V
COMP ON: 0 V
Q1016
9 BAL ADJ: 0 V
DTMF: 5.0 V
10 NOMAL AF: 0 V
FLAT AF: 5.0 V
11 FRONT MIC: 0 V
EXT MIC: 5.0 V
5.0 V
Q1014
9 PA: 0 V
2.5 V
RX: 0 V
10 RX OUT: 0 V
DISC OUT: 5.0 V
11 EMPH ON: 0 V
EMPH OFF: 5.0 V
AF OFF: 5.0 V
AF ON: 0 V
PWR OFF: 6.6 V HOOK OFF: 5.0 V
PWR ON: 0 V HOOK ON: 0 V
RX: 6.4 V
TX: 0 V
RX: 6.9 V
TX: 0 V
–108.5 dBm
–113 dBm (C1127 removed)
RX: 0.4 V
TX: 0 V
RX: 2.5 V
TX: 8.0 V
+17 dBm
RX: 13.6 V
TX: 13.5 V
45 W: 3.8 V
10 W: 3.4 V
RX: 4.9 V
TX: 0 V
COMP OFF: 0 V
COMP ON: 5.0 V
5.0 V
5.0 V
2.5 V
2.5 V
4.5 V @25 °C
5.0 V
RX: 5.0 V
TX: 0 V
EMPHASYS OFF: 5.0 V
5.0 V EMPHASYS ON: 0 V
SHIFT OFF: 5.0 V
SHIFT ON: 0 V
0 V
RX: 0.9 V
50.85 MHz
TX: 0 V
–107.5 dBm
–120 dBm (C1194 removed)
RX: 4.1 V
TX: 0 V
RX: 2.0 V
TX: 0 V
2.6 V
RX: 0 V
RX: –2.8 V
0.9 V
TX: 4.8 V TX: 0 V
0.7 V
0.2 V
RX: –4.2 V
RX: 3.2 V
TX: 0 V
TX: 3.5 V
RX: 0 V
TX: 0.6 V
RX: –4.3 V
TX: –4.7 V
RX: 0 V
TX: 8.0 V
RX: –4.2 V
TX: –4.6 V
5.0 V
RX: –4.9 V
TX: –5.0 V
0.8 V
MAIN RX: 4.0 V
SUB RX: 0 V
2.9 V
5.0 V
MUTE: 0 V
UNMUTE: 5.0 V
OPTION: 0 V
NON OPTION: 5.0 V
3.5 V
8.0 V
INT DTMF: 0 V
EXT DTMF: 5.0 V
50.85 MHz
–94.1 dBm
50.85 MHz
–99.5 dBm (C1302 removed)
–111 dBm
–117.5 dBm (C1236 removed)
RX: 2.8 V
TX: 0 V
RX: 1.4 V
TX: 0 V
RX: 0.7 V
RX: 8.0 V TX: 0 V
TX: 0 V
7.2 V 8.0 V
RX: 6.9 V
TX: 7.2 V
RX: 7.1 V
TX: 6.6 V
RX: 5.1 V
TX: 4.7 V
5.0 V
RX: 4.6 V
TX: 4.2 V
1.7 V
2.3 V
1.6 V
0.1 V
5.0 V
MAIN RX: 4.0 V
SUB RX: 0 V
12.9 V
5.0 V
SHIFT ON: 0 V
5.0 V
SHIFT OFF: 5.0 V
13.6 V
5.0 V
5.5 V
8.0 V
RX: 0 V
TX: 4.9 V
RF Unit
Circuit Diagram
RX: 4.8 V
TX: 0 V
RX: 3.2 V
TX: 0 V
RX: 0.6 V
TX: 0 V
RX: 1.3 V
0 V
TX: 0 V
WIDE: 3.3 V
NARROW: 0 V
WIDE: 0 V
NARROW: 4.5 V
5.0 V
2.5 V
4.9 V
LOCK: 5.0 V
UNLOCK: 0 V
MAIN RX: 5.0 V
SUB RX: 0 V
RX: 5.0 V
TX: 0.1 V
5.0 V
RX: 0 V
TX: 4.9 V
H-1