Kenwood TK-8102 Service Manual

TK-8102
22
Display Unit (X54-3460-20)
Ref. No. Parts name Description
IC1 IC Shift register for LED & MICBL control
Q4 Transistor Busy light switch
Q9,10 Transistor Key backlit switch
D1~4 LED Key backlit
D5 LED Monitor key light
D6 LED Programmable key light
D7~10 LED Channel key light
D11 LED Busy
D12 LED Transmit
D13 Diode Surge protection
TX-RX Unit (X57-6920-XX)
Ref. No. Parts name Description
IC31 IC Voltage regulator (8C)
IC32 IC Voltage regulator (5C)
IC33 IC Voltage regulator (5M)
IC34 IC Voltage detector reset
IC35 IC Voltage detector int
IC66 IC EEPROM
IC101 IC CPU
IC161 IC Digital potentiometer
IC201 IC MIC amplifier / IDC
IC202 IC MIC amplifier / Splatter filter
IC203 IC Buffer amplifier / SUM amplifier /
DC amplifier / 1/2 Vcc
IC251 IC Audio filter
IC252 IC Audio amplifier
IC301 IC FM demodulation
IC401 IC PLL synthesizer
IC501 IC APC controller
IC502 IC Power module
Q1 Transistor TX AF
Q31 Transistor DC switch (SB) / Active when power is on
Q32 FET DC switch (SB) / Active when power is on
Q33,34 Transistor DC switch (8R) / Active while RX
Q35,36 Transistor DC switch (8T) / Active while TX
Q61 Transistor Over voltage detection / Active when
PS voltage is more than18V
Q71 Transistor Ignition / Ignition sens
Q86,87 Transistor Beat shift / Active while beat shift is on
Q201 Transistor AF amplifier / MIC mute / Emergency MIC mute
Q202 FET Emergency MIC mute / Active when
MICEM is H
Q251 Transistor Buffer amplifier / RX audio
Ref. No. Parts name Description
Q252,253 FET AF mute / Active while AFM is H
Q254 Digital transistor AF mute / Active while SPM is H
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)
Q501,502 Transistor RF 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
D602 Diode ANT switch
D604,605 Diode ANT switch
D606,607 Diode APC voltage detectV
D608,609 Diode Temperature compensation
COMPONENTS DESCRIPTION

Kenwood TK-8102 Specifications

Frequency and Channels

frequency range M	450 to 490MHz
frequency range M2	485 to 520MHz
frequency range M3	400 to 430MHz
number of channels	4 channels
channel spacing wide	25kHz
channel spacing narrow	12.5kHz
PLL channel stepping	5, 6.25kHz

Power

operating voltage	13.6V DC ±15%
current drain standby	Less than 0.4A
current drain receive	Less than 1.0A
current drain transmit	Less than 8.0A

Operating Environment

operating temperature range	–30°C to +60°C
dimensions	160 (W) x 43 (H) x 107 (D) mm
weight	Approx 1.0kg

Receiver Specifications

sensitivity 12dB SINAD wide	0.28µV
sensitivity 12dB SINAD narrow	0.35µV
selectivity wide	75dB
selectivity narrow	65dB
intermodulation wide	70dB
intermodulation narrow	60dB
spurious response	75dB
audio power output	4.0W
frequency stability	±2.5ppm

Transmitter Specifications

RF power output	25W
spurious and harmonics	70dB
modulation wide	16K0F3E
modulation narrow	11K0F3E
FM noise wide	45dB
FM noise narrow	40dB
audio distortion	Less than 3%
frequency stability	±2.5ppm