JVC MX-K3
Circuit Diagrams

MX-K3

Block diagram
7

MAIN board
AUX IN JA301 L R AM ANT-TERMINAL JA302 MIC JACK J850 FM
1 7 28 LIN4 RIN4

POWER AMP. board
CN1101
IC304 Power amp.
15 L OUT 27 3 1 IN 2 OUT2+/10, 11 R OUT 26 5

Head Phone
L R

6

L2 LC1
BPF
3

1 24

16

L OUT R OUT

5 2

IC101 Source Select
LIN2 RIN2

J303 SP L
6, 7

IC1 AM/FM DET

17

MIC AMP. board
IC852
Mic amp.

IC102 AMP

7

1

IN 1

OUT1+/-

SP R

IC851

Mic

2

FW852 CN605 CN308a CN307a

LPF & ECHO mix

IC301 Mic mixer

13 3 6 1 LIN3 RIN3 MUXO_L IN(L) MUXO_R IN(R) CH1_A PREOUT1 5 14 REC_IN2 PB R REC L REC R MPX 4 3 LIN1 RIN1 VCK, VDATA

Power& supply Control CN901 CN951
POWER TRANS. board / VOLTAGE SELECTOR board

CN602 CN601 CN603 CN604 CN305 CN308 CN307 CN306

5
PB HEAD (A cassette)

IC401
PB L PB R 24 1

REC/PB AMP.
CH2_A PREOUT2 20 PB L

8 9 10 11

T951

S999

L N

AC IN

RB L

23

REC/PB HEAD (B cassette)

REC L RB R REC R

Q405 Q505

CH2_B CH1_B

11 REC_IN1

(For US/UX/UT)

2

4
Q403 Q404 Q503 Q504
A/B, TPA, TPB SOLA, SOLB, MOT 16 9 REC_OUT2 REC_OUT1 A/B_SW 19 A/B

IC2 PLL Q402 Q502 Q401 Q501

POWER TRANS. board

FW951

AC IN T951 L N
(For UY)

Cassette Deck Main Motor Head/Half/High/Rec FWD switch Turn Table Motor (Disk Motor) Disk count /Table position switch Tray Motor Tray switch

M

RPHD

IC402 Shift Register

CN701
SCK, SDO

3

M

FW701

DCNT, TPSW

DM+ DM-

IC601 Digital servo & Processor
UPSW, DWSW, CLSW, OPSW

75 73

SCK, SDI, SDO, TUCE

IC701 CPU & FL driver

SW SW Volume

CN301 CN302 FW303

MDATA, MCLK

CN703 CN702 CN902

M

RECM, PBM

LED

TM+

CW, CCW, CNTT

SWITCH board

Pick Up

TMT+ TF+ F-

2

Feed/Spindle Motor Rest switch

M

IC621 CD DRIVER

FOD, TRD, KICK, TRV TVD, ECM, ECS

FL display

FW702 FW701

Focusing/Tracking

IC611 RF&SERVO

ARF, RFENV, BDO OFT, /RFDET

A.BASS switch

CONTROL/FL board

Active bass EX. switch board

1

A

B

C

D

E

F

G

H

I

J

2-3