Description Of Components - Kenwood TK-190 Service Manual

TX-RX Unit (X57-608X-XX)
Ref. No. Use / Function
IC1 D/A converter
IC2 APC comparator
IC101 PLL IC containing two circuits
IC200 1st mixer IC reception
IC300 FM IF SYSTEM IC
IC301 Audio switch
IC400 Shift register
IC401 5V voltage power supply
IC402 5V voltage power supply
IC403 Shift register
IC404 Shift register
IC405 Shift register
IC406 Microprocessor
IC409 Reset voltage detection
IC412 EEPROM
IC413 LPF filter
IC414 Flash ROM
IC415 Address decode latch
IC416 Clock reverse, buffer amplifier Inverter
IC417 Clock reverse
IC600 DTMF decode IC
IC601 Buffer amplifier
IC602 Active low pass filter
IC603 D/A converter
IC604 Mixed, buffer amplifier
IC606 Mixed amplifier
IC607 Audio processor
Q1 RF drive amplifier
Q2 RF drive amplifier
Q4 APC circuit movement SW
Q5 APC reference voltage SW
Q7 ANT_SWcircuit control SW
Q8 Transmission power control Operate when transmitted
voltage SW
Q32 RF pre-drive amplifier
Q101 Ripple filter
Q102 Transmission mixer
Q103 RF amplifier
Q104 RF amplifier

DESCRIPTION OF COMPONENTS

Operation / Condition
2nd mixer, detector, AF
amplifier, noise amplifier
Operate (ON) when
received
Expansion output port
5CM
5C, 5R
Qutput expander
Qutput expander
Qutput expander
For HSD, LSD output
NOR gate
Inverter
For LSD input
Audio adjustment
For AF, TONE
For MOD
Operate when transmitted
Operate when transmitted
Operate when transmitted
Operate when transmitted
Operate when transmitted
Operate when transmitted
Operate when transmitted
Ref. No. Use / Function
Q105 RF amplifier
Q106 RF amplifier
Q200 RF amplifier
Q302 IF amplifier
Q304 Noise amplifier
Q400 DC SWITCH
Q401 DC SWITCH
Q402 DC SWITCH
Q403 DC SWITCH
Q404 DC SWITCH
Q405 DC SWITCH
Q406 DC SWITCH
Q407 DC SWITCH
Q408 DC SWITCH
Q409 DC SWITCH
Q410 DC SWITCH
Q411 Current driver
Q413 DC SWITCH
Q414 DC SWITCH
Q415 DC SWITCH
Q416 DC SWITCH
Q601 MUTE SWITCH
Q602 DC SWITCH
D1 Constant voltage circuit
D2 Antenna switch
D3 Antenna switch
D102 RF switch
D201 VARACTOR TUNING
D203 VARACTOR TUNING
D207 VARACTOR TUNING
D301 AM detector
D400 Reverse connect prevention
D401 Over voltage protection
D402 Surge voltage protecton
D403 Surge voltage protecton
D404 Commutation
D405 Commutation
D409 Constant voltage circuit
D601 Voltage clamp
TK-190
Operation / Condition
Operate when transmitted
Operate when transmitted
Operate when transmitted
5T control
5T control
5TB
MIC mute
MIC SW
5T
5RB
5R
TX LED (RED) driver
BUSY LED (GREEN) driver
LAMP
LAMP :Back light
Battery voltage detection
Power supply circuit SW
SB
SB
MIC mute
For L201
For L202
For L206
Noise squelch
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