Standard Horizon HX851, Service Manual

Page: 17 / 34

17
MAIN Unit
Circuit Diagram
RX: 2.4 V
RX: 3.1 V
RX: 4.0 V
RX: 0.8 V
TX: 4.4 V
TX: 2.2 V
TX: 1.5 V
TX: 1.7 V
TX: 1.7 V
TX: 1.8 V
TX: 1.8 V
TX: 1.5 V
TX: 1.4 V
TX: 1.5 V
TX: 1.7 V
RX: 4.5 V
RX: 2.4 V
RX: 0.9 V
RX: 2.3 V
RX: 4.1 V
RX: 3.5 V
RX: 1.4 V RX: 2.0 V
RX: 0.8 V
RX: 2.2 V
RX: 5.0 V
RX: 4.8 V
TX: 4.8 V
5.0 V
3.2 V
3.3 V
3.3 V
3.1 V
2.5 V
TX: 3.1 V
RX: 3.1 V
2.4 V
DIMMER “OFF”: 6.1 V
DIMMER “HIGH”: 5.3 V
DIMMER “OFF”: 0 V
DIMMER “HIGH”: 2.3 V
DIMMER “OFF”: 0 V
DIMMER “HIGH”: 3.0 V
RX: 0.7 V
RX: 4.0 V
TX: 2.5 V
3.2 V
0.1 ~ 3.2 V
1.6 ~ 3.2 V
RX: 0.1 V
RX: 3.3 V
RX: 0.7 V
RX: 0.8 V
RX: 0.2 V
RX: 2.3 V
RX: 0.4 V
RX: 1.0 V
RX: 1.9 V RX: 1.8 V
RX: 3.6 V
RX: 1.2 V
7.4 V MUTE “OFF”: 7.2 V
MUTE “ON”: 0 V
MUTE “OFF”: 6.6 V
MUTE “ON”: 7.4 V
MUTE “OFF”: 3.3 V
MUTE “ON”: 0 V
PTT “OFF”: 3.8 V
PTT “ON”: 1.2 V
PTT “OFF”: 3.8 V
PTT “ON”: 0 V
PTT “OFF”: 0 V
PTT “ON”: 3.2 V
5.0 V
1.8 V
4.9 V
1.7 V
1.8 V
1.8 V
1.6 V
1.8 V
1.7 V
1.7 V
1.8 V
1.6 V
LOCK: 3.3 V
UNLOCK: 0 V
3.3 V