JVC KD-SX998R
Circuit Diagrams

KD-SX998R,KD-SX997R

Block diagram
CN251
L, R

5
J1 ANT TU1 FM/AM TUNER
FM VT AM VT FM/AM OSC TU.R TU.L

IC251 SUBWOOFER
SWL SWR

IC161 E.VOL

OUTLF OUTRF

VA,VB VE,VF MD,LD

IC601 RWSEL IC571 CD RF IOP 24bit DAC
DACML SEL TEB RFGC DACMC DACMD DACCS DSPRST SDO

VOUTL VOUTR

IC572 CD LPF
CD.L-CH CD.R-CH

IC361 Lch LINE AMP

INLF INLR

IC301 POWER AMP

SEEK/STOP SD/ST FM/AM MONO SM SQ AFCK OUTRF OUTRR INRF INRR

4

TE,FE RFDC RF RFRP

LRCK BCK

IC653 SRAM
IO0~IO7 AD0~AD16 OE,CE,WR

IC31 PLL
PLLCE PLLDA PLLCL PLLDI

CN601

IC381 Rch LINE AMP
FRONTL REARL FRONTR REARR OUTLF+ OUTLFOUTRF+ OUTRFOUTLR+ OUTLROUTRR+ OUTRR-

REST REST SWITCH LOAD/FEED LOAD/FEED+ MOTOR LOAD/FEEDSPINDLE SPINDLE+

IC621 D.SERVO & DSP
BUS0 BUS1 BUS2 BUS3 BUCK CCE DSPRST

BCK LRCK DATA

IC652 MP3 DEC
CD.L-CH CD.R-CH

3

MOTOR

SPINDLE-

SW1,SW2 SW1,SW2
A,B,E,F

LOAD/FEED+ LOAD/FEEDSPINDLE+ SPINDLEFMO TRACKING+ DMC TRACKINGTRO FOCUS+ FOO FOCUS-

MP3RST MP3DA MP3CK CDRESET DISCSEL CDMUTE CDREQ B.DET P.DET /BUSIO BUSIO BUSSI BUSSO BUSSCK

CDMUTE CDREQ CDRESET B.DET P.DET BUSSI/SO BUSSI/SO BUSCLK

VOLDA VOLCL

SUBWMUTE

IC701 CPU
RESET BUSSO I/O BUSINT BUSSCK

EPROMCLK EPROMDO EPROMDI

IC771 EPROM IC702 RESET

PICKUP VR,MD,LD
FOCUS+ FOCUSTRACKING+ TRACKING-

IC681 LOAD CD DRIVER LD/FE
CDON SW1,SW2,RESET

IC501 CPU

IC503 J-BUS BUFF
BUSSI/SO BUSCLK

J321 LINE OUT

CN901 SPK BATT

2
IC601 LCD DRIVER EN601 ENCODER
LCDCE LCDDA LCDCL KEY0~KEY2 REMOCON ENC1 ENC2

CN501 CN601

LCD

COM1~COM3 S1~S68

CN101 CN701

AUX.L AUX.R REMOCON ENC1,ENC2 LCDCE,LCDDA LCDCL KEY0,KEY1,KEY2

IC801 JVC BUS
SI/SO SCK

AUX,L AUX,R

S601~S617 KEY MATRIX

IC602 REMOCON

J601 AUX IN

J801 CH.L CH.R CHANGER CONTROL

1

A

B

C

D

E

F

G

2-1