Components Description - Kenwood TK-8108H Service Manual

TK-8108H
Display Unit (X54-3460-20)
Ref. No. Parts name
IC1 IC
Q4 Transistor
Q9,10 Transistor
D1~4 LED
D5 LED
D6 LED
D7~10 LED
D11 LED
D12 LED
D13 Diode
TX-RX Unit (X57-6710-24)
Ref. No. Parts name
IC31 IC
IC32 IC
IC33 IC
IC34 IC
IC35 IC
IC66 IC
IC101 IC
IC161 IC
IC201 IC
IC202 IC
IC203 IC
IC251 IC
IC252 IC
IC301 IC
IC401 IC
IC501 IC
Q1 Transistor
Q31,32 Transistor
Q33,34 Transistor
Q35,36 Transistor
Q61 Transistor
Q71 Transistor
Q86,87 Transistor
Q201 Transistor
Q202 FET
Q251 Transistor
Q252,253 FET
Q254 Digital transistor
20

COMPONENTS DESCRIPTION

Description
Shift register for LED & MICBL control
Busy light switch
Key backlit switch
Key backlit
Monitor key light
Programmable key light
Channel key light
Busy
Transmit
Surge protection
Description
Voltage regulator (8C)
Voltage regulator (5C)
Voltage regulator (5M)
Voltage detector reset
Voltage detector int
EEPROM
CPU
Digital potentiometer
MIC amplifier / IDC
MIC amplifier / Splatter filter
Buffer amplifier / SUM amplifier /
DC amplifier / 1/2 Vcc
Audio filter
Audio amplifier
FM demodulation
PLL synthesizer
APC controller
TX AF
DC switch (SB) / Active when power is on
DC switch (8R) / Active while RX
DC switch (8T) / Active while TX
Over voltage detection / Active when
PS voltage is more than18V
Ignition / Ignition sens
Beat shift / Active while beat shift is on
AF amplifier / MIC mute / Emergency MIC mute
Emergency MIC mute / Active when
MICEM is H
Buffer amplifier / RX audio
AF mute / Active while AFM is H
AF mute / Active while SPM is H
Ref. No. Parts name
Q255 Transistor AF mute / Active while AMPSW is H
Q301 Transistor SQL amplifier / Noie amplifier
Q302 Transistor Buffer amplifier / 16.8MHz 3rd over tone
Q351 Transistor IF amplifier
Q352 FET Mixer
Q353 FET RF amplifier / LNA
Q402,403 Transistor Charge pump
Q404 Transistor RF amplifier / PLL F in
Q405 FET RX VCO
Q406 FET TX VCO
Q407 FET T/R SW
Q408 Transistor T/R SW
Q410 Transistor Buffer amplifier / Output of VCO
Q411 Transistor RF amplifier / Output of VCO
Q440 Transistor Lipple filter
Q500 Transistor RF switch (TX/RX)
Q501 Transistor RF amplifier / Predrive amplifier
Q502 Transistor RF amplifier / Drive amplifier 1
Q503 FET RF amplifier / Drive amplifier 2
Q504 FET RF amplifier / Final amplifier
D1 Diode Surge absorption / CM
D2 Diode Surge absorption / HOOK
D3 Diode Surge absorption / PTT
D4~11 Diode Surge absorption / FNC1~8
D31 Diode Reverse connection protection
D32 Poly switch Current protection
D61 Diode Over voltage detection
D201 Diode OR gate / MIC mute, AGC
D202 Diode AGC
D251 Diode Limiter
D301 Diode Detection
D302,303 Diode IF switch (Wide/Narrow)
D351~355 Varicap RF BPF tuning
D401 Diode Lipple filter
D402 Diode Voltage dropped
D403,404 Varicap RX VCO
D405,406 Varicap TX VCO
D407 Varicap Modulation
D408 Diode Lipple filter
D409 Diode RF switch (TX/RX)
D502 Diode Temperature compensation
D503 Diode Voltage protectionV
D601,602 Diode ANT switch
D604,605 Diode ANT switch
D606,607 Diode APC voltage detectV
D608 Diode Temperature compensation
Description