Vertex Standard VX-820 series, Service Manual

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33
Display Unit
Circuit Diagram
PWR ON: 0 V
PWR OFF: 3.6 V
7.4 V
MUTE: 7.4 V
BUSY: 1.3 V
TX: 7.4 V
MUTE: 7.4 V
BUSY: 0 V
TX: 7.4 V
MUTE: 0 V
BUSY: 3.4 V
TX: 0 V
INT MIC: 1.9 V
EXT MIC: 0 V
MUTE: 0.6 V
BUSY: 9.4 V
TX: 0.6 V
INT SP: 7.4 V
EXT SP MUTE: 0.2 V
EXT SP BUSY: 0.6 V
TX: 0.2 V
PWR ON: 3.2 V
PWR OFF: 0 V
INT MIC: 7.4 V
EXT MIC: 0 V INT MIC: 0 V
EXT MIC: 2.7 V
3.5 V
INT MIC: 1.9 V
EXT MIC: 0 V
PWR ON: 5.0 V
PWR OFF: 0 V
7.4 V
3.8 V @25 °C
6.9 V
2.8 V @25 °C
3.0 V
LED ON: 4.4 V
LED OFF: 4.7 V
LED ON: 3.3 V
LED OFF: 0 V
PWR ON: 3.5 V
PWR OFF: 0 V
RX: 2.7 V
TX: 0.7 V
9.2 V p-p
@0.7 W
0.1 V p-p
@0.7 W
0.1 V p-p
@0.7 W
LED [B] OFF: 2.8 ~ 3.3 V
LED [B] LOW: 1.6 V
LED [B] HI: 1.4 V
LED [G] OFF: 2.7 ~ 3.3 V
LED [G] LOW: 1.8 V
LED [G] HI: 1.6 V
LED [R] OFF: 3.5 ~ 3.8 V
LED [R] LOW: 2.6 V
LED [R] HI: 2.5 V
LAMP ON: 3.1 V
LAMP OFF: 3.7 V
LAMP ON: 1.2 V
LAMP OFF: 2.4 V
LAMP ON: 0 V
LAMP OFF: 2.4 V
LAMP ON: 3.1 V
LAMP OFF: 4.0 V
LAMP ON: 1.2 V
LAMP OFF: 2.6 V
LAMP ON: 0.1 V
LAMP OFF: 2.6 V