Kenwood NX-820H Service Manual

Also see for Nexedge NX-820H: Instruction manual Instruction manual Instruction manual

NX-820H(G)/820H56TERMINAL FUNCTIONDisplay unit (X54-3830-10)Pin No. Name I/O FunctionCN1 (to TX-RX unit CN514)1 SB I Battery voltage DC supply2 SB I Battery voltage DC supply3 SP– I Speaker input –4 SP– I Speaker input –5 SP+ I Speaker input +6 SP+ I Speaker input +7 BLC I LCD backlight control signal input8 MBL I MIC backlight control signal input9 RLED I Red LED control signal input10 GLED I Green LED control signal input11 BLED I Blue LED control signal input12 GND - Ground13 GND - Ground14 GND - Ground15 EMG O Emergency key detection16 GND - Ground17 NC - No connection18 50C I 5V DC power supply19 LCDDI I LCD data input20 LCDCE I LCD enable input21 LCDCL I LCD clock input22 LCDDO O LCD data output23 GND - Ground24 GND - Ground25 MIC O MIC signal output26 ME - MIC ground27 HOOK/RXD O HOOK/PC serial data28 PTT/TXD I/O PTT/PC serial data29 MKEY I/O MIC data detection30 POWER O Detection output of power switchJ1 (MIC jack)1 MBL O MIC backlight control2 SB O Battery voltage DC supply3 GND - Ground4 PTT I/O PTT/ PC serial data from radio5 ME - MIC ground6 MIC I MIC signal input7 HOOK I HOOK/ PC serial data to radio8 DM I/O MIC data detectionTX-RX unit (X57-8240-1x)Pin No. Name I/O FunctionCN514 (to Disply unit CN1)1 SB O Battery voltage DC supply2 SB O Battery voltage DC supply3 SP– O Speaker output –4 SP– O Speaker output –5 SP+ O Speaker output +6 SP+ O Speaker output +7 BLC O LCD backlight control signal output8 MBL O MIC backlight control signal output9 RLED O Red LED control signal output10 GLED O Green LED control signal output11 BLED O Blue LED control signal output12 GND - Ground13 GND - Ground14 GND - Ground15 EMG I Emergency key detection16 GND - Ground17 NC - No connection18 50C O 5V DC power supply19 LCDDI O LCD data output20 LCDCE O LCD enable output21 LCDCL O LCD clock output22 LCDDO I LCD data input23 GND - Ground24 GND - Ground25 MIC I MIC signal input26 ME - MIC ground27 HOOK/RXD I HOOK/PC serial data28 PTT/TXD I/O PTT/PC serial data29 MKEY I/O MIC data detection30 POWER I Detection input of power switch