Kenwood 762G Service Manual

32TK-760G/762GDESCRIPTION OF COMPONENTSRef. No. Use/Function Operation/ConditionIC9 Shift/Store register HNC, 8RC, 8TC, SPMUTE, RX,PA/LI, AUX5, AUX6IC10 5V AVR 5C (TX/RX)IC11 9V AVR 9CIC12 8V AVR 8CIC13 AF amplifierIC14 Power supply logiccircuit controlIC15 DC amplifier APC controlIC400 Power moduleIC501 Flash ROMIC502 CPUIC503 Reset IC Low voltage output whenpowering upIC505 EEPROMIC507 Amplifier MIC, AFOIC508 Audio processor Compander, MIC amplifier,ALC, AF filter, IDCIC509 Analog switch MO, DEO, EMG, MI switchIC510 Shift/Store register W/N, MM2, MBL, LED0, LED1,AFREG1, AFREG2, BSHIFTIC511 DTMF decodeIC512 5V AVR 5C (control)IC513 Amplifier QT/DQT decodeIC514 Amplifier 2-Tone decodeQ1 DC switch HORQ2 DC switch 5SQ3 DC switch (W/N) Active while it is narrowQ4 DC switch (W/N) Active while it is wideQ5 DC switch HNCQ6 DC switch IGNQ7 Buffer amplifier 16.8MHz x 3Q8 Lipple filter 8CLQ9 Buffer amplifier PLL finQ10 Noise amplifier SquelchQ11 Charge pump øPQ12 Charge pump øRQ13 IF amplifier 49.95MHzQ14 Buffer amplifier HetetodyneQ15 MixerQ16 DC switch 8R cont, active while RXQ17 AF mute Active while AF muteQ18 DC switch 8R, active while RXQ19,20 DC switch SB switch, active whenpowering upRef. No. Use/Function Operation/ConditionQ21 DC switch Active while PS voltage is morethan 20VQ22 RF amplifier PredriveQ23 DC switch SB switch, active whenpowering upQ24 AF mute Active while power switch is offQ25 RF amplifier DriveQ26 Inverter Active while power switch is lowQ27 L.N.A.Q28 DC switch 8T, active while TXQ29 DC switch 8T cont, active while TXQ31 APC controllerQ32 APC controller DBQ33 APC controller Power protectionQ35 W/N switch Active on narrowQ36 DC switch Power protectionQ37 AF mute switch Inactive on muteQ38 DC switch 5SQ39 DC switch Output enableQ501 Clock switch shift Clock shift is on while BSHIFT is HQ502 AF mute Active while MUTE is HQ503 Inverter Active while PA2 is H,active while public addressQ504 LED switch (Red) Active while LED0 is H,active while TXQ505,506 Key backlight switch Active while MBL is HQ508 LED switch (Green) Active while LED1 is H,active while RXQ509 MIC mute Active while MM is H andMM2 is HPLL/VCO (X58-4670-XX) -10 : K,M -11 : K2Ref. No. Use/Function Operation/ConditionD101 RX VCOD102 TX VCOD103 RX VCOD104 TX VCOD105 ModulationQ101 Oscillator RXQ102 Inverter Active while ST is HQ103 Oscillator TXQ104 TX/RX switch (TX) Active while ST is HQ105 TX/RX switch (RX) Active while Q102 is offQ106 Buffer amplifier