Kenwood LZ-651W Service Manual

Also see for LZ-651W: Instruction manual

Contents

LZ-651W3COMPONENTS DESCRIPTION● MAIN UNIT (X09-7161-00/7162-00)Ref No. Parts No. Specification / FunctionIC101 FA7703V Switching power supply control IC (Main system and the power supply for inverters arecontrolled. It has the regulator of 2.2V in an inside.)IC201 TSOP1838-NK Remote control IC (In response to the infrared signal from remote control data istransmitted to a microprocessor).IC202 TC7SH08F-TE85L Remote control signal buffer (When the microprocessor pin No. 14 is H, remote controlsignal is sent to NAVI unit)IC301 TMP88CP38AF-NK System control microprocessor (In addition to the demand processing from remote controletc., OSD is displayed on a liquid crystal display monitor by the RGB output data)IC302 S-80845CNNB-NK System reset ICIC303 S-24CS02AFB-NK E2PROM (Such as a user setup data is back up for E2PROM memory)IC401 TC4053BF (N) C-mos analog switch (Selector of Input audio signals)IC402 BA3121F Reduces of in-phase of noise for input signalIC405 TDA7052BT Monophonic power amplifier of an audio power amplifier BTL system. Volume is controlledon the voltage of VC terminal.IC501 TDA4665T Base band delay line (One-line delay line)IC502 AN2546FH-A Video signal processing IC for liquid crystal display monitorIC503 LZ9GJ25 Timing control IC for liquid crystal display monitorIC504 NJM2107F VCO low path filterIC505 MM1108XFFE Vertical synchronies separation IC (PAL/NTSC automatic distinction)IC506 NJM4580VVCOM signal is received from the dual operational amplifier IC 502, and gain adjustmentand a level shift are performed.Q101 2SJ377 Switching regulatorQ105 2SK3416TL-NK Switching regulator (Main power supply : Power MOS FET)Q106 2SD1766 Power supply for COM signal line (7.5V)Q107 2SB1203-FA Power supply for microprocessor (5V)Q108,118 2SC4081Q112 DTC124EUA PWM signal buffer (from microprocessor)Q113 DTA143EUA Switching for inverter circuit (receiving to PWM signal from microprocessor)Q115,116 2SC3518-Z-T1LK Inverter voltage circuit (Switching frequency 55KHz)Q201 2SC4081 ACC voltage detectorQ202 DTA124EUA Packing detectorQ203 DTC124EUA Muting detectorQ204 2SA1576A (R,S) ACC voltage detector (detect voltage=9.5V)Q205 DTC124EUA ACC voltage high detector (17V)Q401 DTC124EUA Switching transistor (select to input signal NAVI or AV IN)Q403 DTC124EUA Audio muting transistorQ404 DTC124EUA Buzzer driver (BZ401)Q501 2SC4081 Vertical synchronize separationQ503,504 2SC4081 Composite synchronize buffer amp (Voltage shift 3V to 5V)