CD KENWOOD KDC-9026R KDC-PSW9527 KDC-W9027 KDC-X979 SERVICE

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KDC-9026R/PSW9527 KDC-W9027/X979

COMPONENTS DESCRIPTION
Ref No. Q5 Q6,200 Q7,8 Q9 Q10 Q11 Application / Functions 3.3V SW FL 3.3V SW Remote control ON SW FL BLK SW Display blackout LED SW Red LED SW Operation / Condition / Compatibility SW3.3V is turned on when Q5 base level goes L FL +3.3V (VDD1) is turned on when Q200 base level goes H The power supply of IC8, 10 is turned on when Q10 base level goes H VFD is turned on when Q9 base level goes H Green LED is turned on when Q10 base level goes H Red LED is turned on when Q11 base level goes H

SWITCH UNIT (X16-2560-10)
Ref No. Q1 Q2 Q3 Q4 Application / Functions DSI LED SW KEY Illumination SW (Green) KEY Illumination SW (Red) KEY Illumination SW (Blue) Operation / Condition / Compatibility DSI LED blinks when Q1 base level goes H/L KEY Illumination SW "ON" when the Q2 base level goes H KEY Illumination SW "ON" when the Q3 base level goes H KEY Illumination SW "ON" when the Q4 base level goes H

CD PLAYER UNIT (X32-5520-00)
Ref No. IC1 IC2 IC4 IC5 IC6 IC7 IC8 IC9 IC10 Q1 Q2 Q6 Q7 Q8 Q9 Q10 Q11 Q12 Q13 AVR AVR Mechanism control micro processor PWM driver DSP EDO DRAM AVR LPF Switching TR Switching TR Switching TR Switching TR APC Driver Switching TR Switching TR Switching TR Switching TR Application / Functions Motor driver BU3.3V AVR SW3.3V AVR (When CNTL is goes H, IC3 is actives) Focus, Tracking coil, Feed and Spindle motor driver IC CD signal processor, RF amp, Servo control, MP3 & WMA decoder Date buffer (16MB) Audio 3.3V AVR (When P-ON level goes H, Q12, 13 are turned ON) Audio LPF When MRST goes L, Q1 is turned ON When Q1 goes ON, Q2 is turned ON When Q7 goes ON, Q6 is turned ON When P-On goes H, Q7 is turned ON Auto power control & A 5V constant current circuit 1.6V AVR driver Loading & Eject motor drive voltage selector Guarantee of proper operation for between IC's Low level voltage When Q13 base level goes H, Q12 is turned ON When P-On goes H, Q13 is turned ON Operation / Condition / Compatibility Loading & Eject moto
r driver

ELECTRIC UNIT (X34-3050-11/21, X34-3052-71/72)
Ref No. IC1 IC2 IC3 IC4 IC7 IC8 IC9 IC10 IC11~13 IC14 Application / Functions System control IC E-VOL & tuner IC Power supply IC Audio power IC Power supply IC Reset IC Muting logic IC Buffer IC OP AMP RDS decoder Operation / Condition / Compatibility System control microprocessor E-VOL. FM/AM tuner & stereo decoder For A8V AVR Audio power amplifier -9V AVR (For 4.5V Pre-out) When BU5V line voltage is less than 3.5V, this IC output line is "L" Control for MUTE, P-ANT & RESET muting For spectrum analyzer For 4.5V Pre-out Decode for RDS signal

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COMPONENTS DESCRIPTION
Ref No. IC15,16 IC18 IC19 IC20 Q1,2 Q3,601 Q4,5 Q6~8 Q9,602 Q11~14 Q15,16 Q17~19 Q20~22 Q23,24 Q25 Q26 Q27 Q29 Q30,31 Q32,33 Q34 Q201 Q202 Q210 Q303,304 Application / Functions Motor driver P-CON IC Power supply IC Analog SW BU 5V AVR SW5V AVR SW14V AVR Audio 8V AVR Servo +B AVR Illumination & DC/DC +B AVR Audio 10.5V AVR Pre Amp & -9V AVR Pre Amp & +9V AVR P-ANT SW Buffer Small lamp det. SW BU detector ACC detector Muting driver Surge DET. Muting driver Buffer E-VOL muting SW AGC AM +B SW Power control IC Switching regulator IC for CD4.7V Logic IC for muting control While BU is applied when BU5V regulator output is +5V When Q601base level goes H, SW5V regulator output is +5V When Q5 base level goes H, SW14V regulator output is +14V When Q6 base level goes H, A8V regulator output is +8.3V When Q602 base level goes H, S+B regulator output is +7.5V When Q11 base level goes H, AVR output is +9.2V When Q16 base level goes H, AVR output is +10.5V Q18, 19 work as differential amplifier, Q17 wark as driver and -9.1
V is supplied to OP AMP for Pre-out Q20, 22 work as differential amplifier, Q21 wark as driver and +9.4V is supplied to OP AMP for Pre-out When Q23 base level goes H, P-ANT SW output is +14V EX amp control buffer When Q26 base level goes H, Q26 turned ON When Q27 base level goes H, Q27 turned ON When Q29 base level goes H, Q29 turned ON When base level goes L, muting driver is turned ON When Q32 base level goes H, Q32, 33 are turned ON When Q34 base level goes L, muting driver is turned ON Noise detect buffer amp When Q202 base level goes H, muting SW is turned ON When base level goes H, Pre-output is muted For AGC for spectrum analyzer When Q303 base level goes H, AM +B is out to tuner unit Operation / Condition / Compatibility Control for Panel mechanism motor

Q203~208 Pre-out muting SW

ELECTRIC UNIT (X34-3060-10, X34-3062-71)
Ref No. IC1 IC2 IC3 IC4 IC5 IC6 IC7 IC8 IC9 IC10 IC11 IC12 IC13 IC14 Q1 Q2 Application / Functions OP AMP OP AMP OP AMP OP AMP OP AMP OP AMP Analog SW OP AMP OP AMP DSP SRAM Buffer IC AVR AVR AVR AVR Operation / Condition / Compatibility Buffer amp for ADC input (DSP Lch) Buffer amp for ADC input (DSP Rch) LPF for DAC output (DSP Front) LPF for DAC output (DSP Rear) LPF for DAC output (DSP Sub & Center) Sub output amp Bus management SW (Dolby prologic II) Bus management accumulator (Dolby prologic II) Reference AVR Audio DSP (24bit 2ch ADC & 6ch DAC) For DSP Level shift buffer IC(5V3.3V) D 3.3V AVR (For DSP) A 3.3V AVR (For DSP) 3.3V regulator 3.3V regulator

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KDC-9026R/PSW9527 KDC-W9027/X979

MICROCOMPUTER'S TERMINAL DESCRIPTION
SYSTEM MICROPROCESSOR : 703030YGCJ07-A (X34-305 : IC1)
Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32,33 34 35,36 37 38 39 40 41 Pin Name CD SDA TUN SCL RDS AFS M NC CD SCL EVDD EVSS RDS AFS L PWIC BEEP REMO BMS DSP RQ DSP SI DSP CLK I/O I/O I/O I/O I/O I/O O I O O O O Description / Processing Operation CD mechanism, IC2, IC5, ROM correction DATA line Clock input/ output to Tuner front-end RDS control for MPX PLL hold NC CD mechanism, IC2, IC5, ROM correction CLOCK line VDD 5V GND RDS control for MPX PLL hold BEEP audio output terminal Remote control input terminal PL2 BMS control terminal (H : BMS ON, L : BMS OFF) DSP chip select output terminal ( L : Active) DSP serial data output terminal DSP serial data clock output terminal Reset for DSP (AD/DA & DSP, L : RESET) Reset for DSP (System reset, L : RESET) DSP input muting control (L : Mute ON, H : Mute OFF) NC (GND) Audio power IC muting control terminal (POWER OFF, ALL OFF, TEL MUTE : L) Audio power IC Stand-by terminal (POWER IC ON, ALL OFF : H, POWER IC OFF : L
) Power control terminal (POWER ON : H, POWER OFF, ALL OFF : Hi-Z) Over voltage/Over current detection terminal (Normal : H, Bad condition : L) Muting control terminal (ON : OPEN, OFF : L) PREOUT (Rch) muting control terminal PREOUT (Lch) muting control terminal External amplifier control terminal Momentary power dropped detection terminal (No Backup, Momentary power dropped : H, Backup : L) ACC detection terminal (With ACC : L, Without ACC : H) Small lamp detection terminal (ON : L, OFF : H) Antenna control/ Destination select terminal (TUNER ON : H) Reset input terminal Sub clock (32.768kHz) Connect to 1u capacitor Main clock (20MHz) GND AVR 5V NC Communication request to external slave unit (Request : L) Mute request from external slave unit (MUTE : H) Fig.

DSP CODEC RST O DSP INT RST DSP MUTE TEST PWIC MUTE P STBY P CON DIAG MUTE MUTE PRE R MUTE PRE L EXT AMP CONT BU DET ACC DET ILLUMI DET O O O O I/O I O O O O I I I

ANT CONT (TYPE2) I/O RESET XT1/XT2 REGC X2/X1 VSS VDD CLKOUT LX REQ M LX MUTE I O I

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