Kenwood TK-860G Service Manual page 32

TK-860G/ ( N
Ref. No. Use/Function
IC10 5V AVR
IC11 9V AVR
IC12 8V AVR
IC13 AF amplifier
IC14 Power supply logic
circuit control
IC15 DC amplifier
IC400 Power module
IC501 Flash ROM
IC502 CPU
IC503 Reset IC
IC505 EEPROM
IC507 Amplifier
IC508 Audio processor
IC509 Analog switch
IC510 Shift/Store register
IC511 DTMF decode
IC512 5V AVR
IC513 Amplifier
IC514 Amplifier
Q1 DC switch
Q2 DC switch
Q5 DC switch
Q6 DC switch
Q7 Buffer amplifier
Q8 Lipple filter
Q9 Buffer amplifier
Q10 Noise amplifier
Q11 Charge pump
Q12 Charge pump
Q13 IF amplifier
Q14 Buffer amplifier
Q15 Mixer
Q16 DC switch
Q17 AF mute
Q18 DC switch
Q19,20 DC switch
Q21 DC switch
Q22 RF amplifier
Q23 DC switch
Q24 AF mute
32
) /862G/ ( N )
DESCRIPTION OF COMPONENTS
Operation/Condition
5C (TX/RX)
9C
8C
APC control
Low voltage output when
powering up
MIC, AFO
Compander, Mic amplifier,
ALC, AF filter, IDC
MO, DEO, EMG, MI switch
W/N, MM2, MBL, LED0, LED1,
AFREG1, AFREG2, BSHIFT
5C (Control)
QT/DQT decode
2-Tone and 5-Tone decode
HOR
5S
HNC
IGN
16.8MHz x 3
8CL
PLL fin
Squelch
øP
øR
49.95MHz
Heterodyne
8R cont, On at RX
Active while AF mute is active
8R, active while RX
SB switch, active when power up
Active while PS voltage is more
than 20V
SB switch, active hwile power on
Active while power switch is off
Ref. No. Use/Function
Q25 RF amplifier
Q26 Inverter
Q27 RF amplifier
Q28 DC switch
Q29 DC switch
Q31 APC controller
Q32 APC controller
Q33 APC controller
Q34 L.N.A.
Q36 DC switch
Q37 AF mute switch
Q38 DC switch
Q39 DC switch
Q501 Clock switch shift
Q502 AF mute
Q503 Inverter
Q504 LED switch (Red)
Q505,506 Key backlight switch
Q508 LED switch (Green)
Q509 MIC mute
PLL/VCO (X58-4670-15)
Ref. No. Use/Function
D101 RX VCO
D102 TX VCO
D103 RX VCO
D104 TX VCO
D105 Modulation
Q101 Oscillator
Q102 Inverter
Q103 Oscillator
Q104 TX/RX switch (TX)
Q105 TX/RX switch (RX)
Q106 Buffer amplifier
Operation/Condition
Predrive
Active while power switch is low
Drive
8T, active on TX
8T cont, active on TX
DB
Power protection
Power protection
Inactive on mute
5S
Output enable
Clock shift is active while
BSHIFT is H
Active while MUTE is H
Active while PA2 is H,
public address is active
Active while LED0 is H,
TX is active
Active while MBL is H
Active while LED1 is H,
RX is active
Active while MM is H and MM2 is H
Operation/Condition
RX
Active while ST is H
TX
Active while ST is H
Active while Q102 is off