JVC HR-J4020UB
Circuit Diagrams

VIDEO/N.AUDIO BLOCK DIAGRAM

0
TO SYSCON
I2C_DATA_AV I2C_CLK_AV Fsc

3

MAIN (VIDEO/N. AUDIO, TERMINAL)

TO VPS/PDC SLICER

2Fsc

IC1 (VIDEO & AUDIO SIGNAL PROCESSOR)
+5V

TP106 PB. FM

WF4
TP111 D. FF

TO SYSCON
BUF

Q12
51 53 55 57 58 59

NOT USED 61 62 63 64 65 66

X2 67 68 69 70 71

X1 72 73 74 75 76 77

NOT USED

D. FF

WF5
78 80

KILLER OUT

CLK DATA D.FF

CLOCK DRIVER

LCVCO

DOWN CONV

X-TAL VCO/OSC

CR DET B-Y INVERT

CHROMA ACC DET

ACC SW

ACC DET

DISCRI

REC AFC

PB APC

KILLER

REC APC

CCD CONT

COMP

CCD BLOCK
KINSEKI
MSM7470 Series
2fsc APC SW

TANK MESECAM DET

81 82 83

TO SYSCON
MESECAM_DET VIDEO_ENV

49 48

Y-CCD CCDCONT MODE CONTROL VCA R CLPF2 CLPF1 SW35 SW36 L-SECAM MIX LEVEL L-SECAM ADJUST SW30 P

HPF

ENVDET

C-ACC : ON
SW33 4PHASE

+
P

46 45

C-CCD

R SW29 CCD LPF P R SW51

P MAIN CONV2

R MAIN CONV1

C.K

CHROMA ACC C-ACC:THROUGH

WF6
B.E DET DET

85
SP2 CH2 SW42 SP2 SW44

+

SW31 P L-DET R

SW32 R P FH HPF CTL TRAP SW34 R P

REC TRAP
SW37

:ON

86 87

41
U.DRUM
CN1

LPF

SW39 L-SECAM REC MUTE SW40 EXT

CH1 SP1 VC SW46 SW41 SP SP1 SW45

+
REC
L-SECAM TRAP :OFF 2MLPF SW38 P ACC R HPF SD

SW27

VIDEO HEAD
6 5

+5V

NOT USED

43 42
R*L-SECAM

P C.K

CONV

NP

B.D

PILOT

ERASE

PILOT

ADD

6 89 5 4
SP2 SW47

6 5 4 3 2 1

C
BPF EXT INT SW26

P SW28 R

4.43PAL MPAL CONV. DELAY

C DELAY

REC TRAP HiFi TRAP

SP CH2 SP CH1

INT SD SW25 57 PIN 3.3k ADD EXT

SP

SP2 CH2 CH1 SP1 SW43

4 3 2 1

J7105 FRONT VIDEO IN J7101 (AV1 IN/OUT) REAR1 VIDEO IN
V.IN 20 V.GND 18
2 1

41 40

90 91

SP1

SW48

3 2 1

LP/EP_CH2 LP/EP_CH1

4HEAD MODEL ONLY

C

39 38 37 36
DO LPF SQPB EQ SQPB SW19 GCL YNR

SW17 SVHS+L-SECAM N.L. DE-EMPH SECAM DELAY +SSEQ Y-LPF

SW15 P R SQPB SW12 SQPB DL SW8 P SW9 P-EQ SW14 ET LPF R

SW49 INT EXT A.MUTE

79

A.MUTE

TO SYSCON

SQPB

SW20 P R

SVHS+L-SECAM

SQPB LPF

Y

DEH

N.L. EMPH

S-DET G-EQ

FM AGC

629 TRAP

REC FILTER

35 NOT USED 34

SW24

DO DET

C

GCL

DO/REC SW23

6dBAMP

HP-NC TRAP-NC

PC SW52 SW18 R

CH4 CH3

DLIM

DET

FM MOD

GCL

C-SQUELCH R*SVHS R*SDECK

P R

VIDEO AGC
ATP SW16

CH1 CH2

DEMO SW11 P SUB LPF

FO/DEV ADJ

33

REAR VIDEO OUT

C

V.OUT 15 V.GND 17
NOT USED

32 31

V-AMP

SQUE LCH

SYNC SEP

R*SDECK R*SDECK

SW21 PG

FEED BACK CLAMP

C

CLEAR SYNC

VIDEO ALC

R REC FBC+ALC PB AGC+APL

MAIN EMPHASIS CARRIER OFFSET W.C/D.C SW10

AGC DET 0.5Vp-p SW22 ATT -10dB ATT -10dB ATT -10dB ATT -4dB

R SW13 P MAIN

PG

R*SDECK

R*SDECK

35PinGCL

DE EMPHASIS ATT -6dB BAND GAP

TO TERMINAL
TU_VIDEO RF_VIDEO 30 29 28 27 26

GCL

GCL

25

24

23

21

20

19

18

17

16

15

14

12

11

10

9

8

7

TO SYSCON
V_FROM_OSD V.PULSE S DET SB_GAIN V_TO_OSD

Q7104

BUF

WF3

NOT USED

NOT USED

WF1

NOT USED

WF2

BUF Q2

2-27

2-28