Kenwood TK-190 Service Manual

Also see for TK-190: Pricing and specification manual Service manual Service manual Instruction manual Instruction manual

Contents

23TK-190DESCRIPTION OF COMPONENTSTX-RX Unit (X57-608X-XX)Ref. No. Use / Function Operation / ConditionRef. No. Use / Function Operation / ConditionIC1 D/A converterIC2 APC comparatorIC101 PLL IC containing two circuitsIC200 1st mixer IC receptionIC300 FM IF SYSTEM IC 2nd mixer, detector, AFamplifier, noise amplifierIC301 Audio switch Operate (ON) whenreceivedIC400 Shift register Expansion output portIC401 5V voltage power supply 5CMIC402 5V voltage power supply 5C, 5RIC403 Shift register Qutput expanderIC404 Shift register Qutput expanderIC405 Shift register Qutput expanderIC406 MicroprocessorIC409 Reset voltage detectionIC412 EEPROMIC413 LPF filter For HSD, LSD outputIC414 Flash ROMIC415 Address decode latch NOR gateIC416 Clock reverse, buffer amplifier InverterIC417 Clock reverse InverterIC600 DTMF decode ICIC601 Buffer amplifierIC602 Active low pass filter For LSD inputIC603 D/A converter Audio adjustmentIC604 Mixed, buffer amplifier For AF, TONEIC606 Mixed amplifier For MODIC607 Audio processorQ1 RF drive amplifier Operate when transmittedQ2 RF drive amplifier Operate when transmittedQ4 APC circuit movement SW Operate when transmittedQ5 APC reference voltage SW Operate when transmittedQ7 ANT_SWcircuit control SW Operate when transmittedQ8 Transmission power control Operate when transmittedvoltage SWQ32 RF pre-drive amplifier Operate when transmittedQ101 Ripple filterQ102 Transmission mixer Operate when transmittedQ103 RF amplifierQ104 RF amplifierQ105 RF amplifierQ106 RF amplifierQ200 RF amplifier Operate when transmittedQ302 IF amplifier Operate when transmittedQ304 Noise amplifier Operate when transmittedQ400 DC SWITCH 5T controlQ401 DC SWITCH 5T controlQ402 DC SWITCH 5TBQ403 DC SWITCH MIC muteQ404 DC SWITCH MIC SWQ405 DC SWITCH 5TQ406 DC SWITCH 5RBQ407 DC SWITCH 5RQ408 DC SWITCH TX LED (RED) driverQ409 DC SWITCH BUSY LED (GREEN) driverQ410 DC SWITCH LAMPQ411 Current driver LAMP :Back lightQ413 DC SWITCH Battery voltage detectionQ414 DC SWITCH Power supply circuit SWQ415 DC SWITCH SBQ416 DC SWITCH SBQ601 MUTE SWITCH MIC muteQ602 DC SWITCHD1 Constant voltage circuitD2 Antenna switchD3 Antenna switchD102 RF switchD201 VARACTOR TUNING For L201D203 VARACTOR TUNING For L202D207 VARACTOR TUNING For L206D301 AM detector Noise squelchD400 Reverse connect preventionD401 Over voltage protectionD402 Surge voltage protectonD403 Surge voltage protectonD404 CommutationD405 CommutationD409 Constant voltage circuitD601 Voltage clamp