HYT TR-800, Service Manual

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TR-800 Service Manual
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36 KEYBL O Keypad backlight control Active: H
37 Rx Tone/I I Slave radio signal input Active: L
(external pull-up resistor connected)
38 SETUP/I I SETUP signal input On: H (rising edge trigger)
39 OPT/I I OPT key input Active: L (external pull-up resistor connected)
40 RPT/I I RPT key input Active: L (external pull-up resistor connected)
41 DN I DN key input Active: L (external pull-up resistor connected)
42 UP I UP key input Active: L (external pull-up resistor connected)
43 SCAN I SCAN key input Active: L (external pull-up resistor connected)
44 MONI I MONI key input Active: L (external pull-up resistor connected)
TR-800 Accessory Connector
Pin Description Comments Remark
1 Channel Select 1 Channel select bit 1, binary selection Low Active for Logic “1”
2 Channel Select 2 Channel select bit 2, binary selection Low Active for Logic “1”
3 Mic Audio
External Microphone Audio Input 120mV
RMS @60% Deviation 600 Ω Input
4 Channel Select 3 Channel select bit 3, binary selection Low Active for Logic “1”
5 Rx Filtered Audio Filtered Audio Output 780mV RMS 600 Ω Output
6 Rx Tone(Carrier) Programmable Input/Output (Slave) Low Active
7 Rx Flat Audio Flat Audio Output 400mV RMS 600 Ω Output
8 PTT External or Data PTT (Main) Low Active
9 GND GND
10 Channel Select 4 Channel select bit 4, binary selection Low Active for Logic “1”
11 DI Flat Tx Audio Input
12 SP+ External Speaker Output
13 GND GND
14 Switch B+ Switch B+ Sense 1.1A Max
15 Ign Control Ignition control Input High Active