JVC HR-J271MS, HR-J471MS, HR-J677MS, HR-J777MS Schematics

SECTION 4

24

C331 11/10

22201816

WF25

C329

0.1/50

C330

0.1/50

R344 47K

R343 18K

R345 10K

R346 15K

Measurement point

Waveform number

12 3

2.5

(5.0)

1.8

PB and REC modes (Voltage of PB and REC modes are the same)

PB mode

REC mode

CHARTS AND DIAGRAMS

NOTES OF SCHEMATIC DIAGRAM

Safety precautions The Components identified by the symbol are

critical for safety. For continued safety, replace safety critical components only with manufacturer's recommended parts.

1. Units of components on the schematic diagram

Unless otherwise specified.

1) All resistance values are in ohm, 1/6 W, 1/8 W (refer to parts list). Chip resistors are 1/16 W.

(1000 ), M: M (1000K )

K: K

2) All capacitance values are in µF, (P: PF).

3) All inductance values are in µH, (m: mH).

4) All diodes are 1SS133, MA165 or 1N4148M (refer to parts list).

2. Indications of control voltage

AUX : Active at high

AUX or AUX(L) : Active at low

3. Interpreting Connector indications

1

2

Removable connector

3

1

2

Wire soldered directly on board

3

4) Indication on schematic diagram Voltage Indications for REC and PB mode on the schematic diagram are as shown below.

Note: If the voltages are not indicated on the schematic

diagram, refer to the voltage charts.

5. Waveform measurement

1) Video circuits REC : Colour bar signal in SP mode, normal VHS mode PB : Alignment tape, colour bar SP mode, normal VHS

mode

2) Audio circuits REC : 1KHz, –8 dBs sine wave signal in SP mode, normal

VHS mode

PB : REC then playback it

3) Movie Camera circuits Measured using a correctly illuminated gray scale or colour bar test chatrs in the E-E mode

4) Indication on schematic diagram Waveform indications on the schematic diagram are as shown below.

1

2

3

2

4

4. Voltage measurement

1) Video circuits REC : Colour bar signal in SP mode, normal VHS mode PB : Alignment tape, colour bar SP mode, normal VHS

mode

— : Unmeasurable or unnecessary to measure

2) Audio circuits REC : 1KHz, –8 dBs sine wave signal in SP mode, Nor-

mal VHS mode

PB : REC then playback it

3) Movie Camera circuits Measured using a correctly illuminated gray scale or colour

S40884-03

bar test charts in the E-E mode

Non-removable Board connector

1

Board to Board

3

Connected pattern on board The arrows indicate signal path

5) Waveform indications

Waveform number

WF25

REC/PB 1.2 Vp-p

50 mV/2 msec/DIV

Oscilloscope Volts and Time/Division, Probe 10 : 1

Mode : REC or PB modes

Waveform name or measurement point

ALC OUT

Level : 1.2 Vp-p

4-1

6. Signal path Symbols

The arrows indicate the signal path as follows.

Playback signal path

Playback and recording signal path

Recording signal path (including E-E signal path)

Capstan servo path

CIRCUIT BOARD NOTES

1. Foil and Component sides

1) Foil side (B side) : Parts on the foil side seen from foil face (pattern face) are indicated.

2) Component side (A side) : Parts on the component side seen from component face (parts face) indicated.

Drum servo path

(Example)

R-Y

Playback R-Y signal path

Y

Recording Y signal path

7. Indication of the parts for adjustments

The parts for the adjustments are surrounded with the circle as shown below.

8. Indication of the parts not mounted on the circuit board

“OPEN” is indicated by the parts not mounted on the circuit board.

R216

OPEN

2. Parts location guides

Parts location are indicated by guide scale on the circuit board.

REF No. LOCATION

Category: IC

Horizontal “A” zone

Vertical “6” zone

(A : Component side)

(D : Discrete component)

B : Foil side

C : Chip component

IC

IC101 B C 6A

Note:

For general information in service manual, please refer to the Service Manual of GENERAL INFORMATION Edition 4 No. 82054D (January 1994).

4-2

S40884-03

4.1

BOARD INTERCONNECTIONS [HR-J271MS,HR-J471MS]

(

Page 4-15

)

OPEN

AC110-240V

50/60Hz

OPEN

BS-IF

OUT

IN

BIT IN/OUT DET IN/OUT

REAR OUT

)

AUDIO(R

VIDEO VIDEO

AUDIO AUDIO

REAR IN

AUDIO(R

)

ANT OUT

ANT IN

FRONT VIDEO

FRONT AUDIO

5

J6201

J6202

J2

OPEN

06

AV.COMPU

J7104

4

J7105

C.BOX CTL

LED RETURN

OPEN

J1

OPEN

BACK UP

MAIN

(

VIDEO/N.AUDIO

(

SYSCON

(

SW. REG

(

TUNER

(

DISPLAY

(

BS CONNECTION Page 4-15

(

TERMINAL

Page 4-5 Page 4-7

Page 4-9 Page 4-11 Page 4-13

Page 4-16

J7101

OPEN

BS P.CTL

I2C DATA

I2C CLK

BIT IN(H

ANT CTL(L

BS ANT

CN7102

BS VIDEO

BS AUDIO(L

BS AUDIO(R

CN6204

DET OUT BIT GND

BIT OUT

DET GND

DET IN

BIT GND

BIT IN

CN6203

BS P.CTL

I2C DATA

I2C CLK )

)

1

2

3

4

5

6

7

BIT IN(H

ANT CTL(L

BS ANT

CN6201

BS VIDEO

BS AUDIO(L

BS AUDIO(R

CN6202

7

DET OUT

6

BIT GND

5

BIT OUT

DET GND

4

DET IN

3

BIT GND

2

1

BIT IN

)

AL5V

)

(

MOD SDA

30V

( TU

MOD B

MOD SCL

AL5V

( BB

2627282930313233343536373839404142

TP

43

TUNER

(

Page 4-11

SW1

SW2

4445464748

)

SIF OUT

49

ONLY USED FOR HR-J471MS

) )

)

) ) )

)

CN7001

35

SHUTTLE

3

OPEN

MINI FRONT (

Page 4-14

OPEN

2

DRUM CTL V

CON1

93

LT BATTERY

1

28

MINI FRONT

ONLY USED

FOR

EP/LP

EP/LP EP/LP

EP/LP

OPEN

) L

(

M12V

CAP REV

CAP FG

CAP CTL V

)

ONLY USED

FOR

HR-J471MS HR-J471MS

4-3 4-4

HGFEDCBA

4.2

VIDEO/N.AUDIO SCHEMATIC DIAGRAM [HR-J271MS,HR-J471MS]

NOTE :

When ordering parts, be sure to order according to

the Part Number indicated in the Parts List.

5

4

3

2

OPEN

TO FULL ERASE HEAD

TO BS CONNECTION

TO TERMINAL

TO TUNER

TO SYSCON

TO SW.REG

TO U.DRUM

##

CN1

TO SYSCON

TO A/C HEAD CN1

TO SYSCON

MAIN(VIDEO/N.AUDIO

1SS133

)

WF10

OPEN

4.7k

15k

56k

##

56k

10k

##

0

##

OPEN

WF8

HIFI MODEL HIFIMODEL

WF9

C89

#

0 C90

#

0

180

0.0015

18k

1

JCP8021-MVC

WF1

Y

47p

C

Y

WF3

WF2

OPEN

C

OPEN

1/50

OPEN

WF7

NC

C

WF6

C

WF5

WF4

100/6.3

SHORT

1/50

0.01

0.22

SHORT

680

0.033

OPEN

W24

OPEN

Q26

OPEN

Q12 2SA1576A /QR

OPEN

TO SYSCON

0.1

OPEN

C

0

330

33

22p

68p

OPEN

#

OPEN

OPENOPEN

4.7k

#

0.1

OPEN

220/6.3

#

0.1

WF11

PB.FM

0.1

OPEN

Y

0

##

1

NOTES : 1. For VIDEO/N.AUDIO waveforms,please refer to page 4-35.

2. Comparison chart of models & marks (#).

##

REF.NO. CN1 D4,D5 C1,C2 C3,C4 C51 C89,C90 R71

M

O

HR-J271MS PIN5-8 NOT USED NOT USED NOT USED USED USED NOT USED

D

E

HR-J471MS PIN1-8 USED USED USED NOT USED NOT USED USED

L

1SS133

ABCD EFGH

##

1SS133

4-5 4-6

0.01 F

0.1

F

6.8k

2.2k

1.5k

0.22

0.01

C112

C113

C114

180p

27

68

820p

82p

OPEN

560

390

Q39 UN521E

12p

Q40

UN521E

Q42 UN521E

R95 10k

R2006,R2009

4.3

SYSTEM CONTROL SCHEMATIC DIAGRAM [HR-J271MS,HR-J471MS]

TO SW.REG

NOTE :

When ordering parts,be sure to order according to

the Part Number indicated in the Parts List.

TO CAP MDA

5

WF3

TO

WF2

WF1

DRUM MOTOR CON1

TO LT BATTERY FW7106

BACK UP

TO C.BOX CTL FW7105

)

MESECAM(H

TO R.PAUSE FW7104

TO VIDEO/N.AUDIO

OPEN

ICP-N25

AL5V

TO DISPLAY

4

TO TUNER

3

NC

TO MV ADV

TO VIDEO/N.AUDIO

2

0.01

TO BS CONNECTION

0.01

R3241

R3240

OPEN

2SC4081 2SC4081 /QRS

Vref

OPEN

OUT 2

W9 0

RD33ES/B2

GND

1SS1355

0.01

)

WF4

33/6.3

R3058 1k

100p

Q202 2SC4083/NP

M24C04-BN6

WF5

OPEN

47/6.3

SHORT

OPEN

0.0022

100

OPEN

0.01

0

0.01

4.7k

1k

4.7k

OPEN

0.01

(

14.32MHz

OPEN

1SS133

0.01

)

18p

(

TIMER CLOCK

OPEN

32KHz

OPEN

DTC114EUA

OPEN OPEN

OPEN

1SS133

0.01

MN101D02GJW

OPEN

1k

OPEN

4.7k

OPEN

1k

OPEN

MESECAM(H

WF7

WF6

4.7

SHORT

OPEN

270p

0

5.6

##

OPEN

C3055

OPEN

)

10p

18p

1000/6.3

OUT 1

/QRS

OPEN

RB721Q-40 1k

BA6956AN

IN 2

IN 1

Vcc

GND

UN521K

OPEN

TO TERMINAL

TO VIDEO/N.AUDIO

1

I2C CLK I2C DATA

NOTES : 1. For SYSCON waveforms,please refer to page 4-35.

2. Comparison chart of models & marks (#).

REF.NO. R210

M

O

HR-J271MS

D

E

HR-J471MS

L

5.6k

3.3k

4-7 4-8

HGFEDCBA

4.4

SWITCHING REGULATOR SCHEMATIC DIAGRAM [HR-J271MS,HR-J471MS]

NOTE :

When ordering parts,be sure to order according to the Part Number indicated in the Parts List.

SHORT

TO DISPLAY

5

0

AC110-240V

50/60Hz

2A/250

VA5001

OPEN

0.068 /250

OPEN

4

SG5001

OPEN

VA5002

OPEN

3

D5001

S1WB/A/60-4102

OPEN

82/400

2SK2632

220k

OPEN

1SS133

68k 2W

SHORT

AU01Z

TO SYSCON

OPEN

33p /1k

GROUND POINT FOR SECONDARY VOLTAGE

220

OPEN

D5203

D5204

D5205

AU01Z

680/10

OPEN

R5306 56k

0.056

OPEN

##

C5321

OPEN

1

220

OPEN

2SD2144S/UV

OPEN

0

OPEN

0

TO SYSCON

SW12V

RF5V

SW12V

TO DISPLAY

TO VIDEO/N.AUDIO

TO TUNER

TO TERMINAL

TO TUNER

TO SYSCON

TO BS CONNECTION

TO SYSCON

#

47/10

100/10

820

OPEN

2.2k 2W

OPEN

270p

2

GROUND POINT FOR PRIMARY VOLTAGE

0.0022 /250

D5208 OPEN

C5206 180/25

OPEN

##

0

OPEN

DENGEROUS VOLTAGE

OPEN

TO BS CONNECTION

TO SYSCON

TO TUNER

TO DISPLAY

NOTE : Comparison chart of models & marks (#).

REF.NO.

M

O

HR-J271MS

D E

HR-J471MS USED 11ES2 USED USED

L

Q5301,Q5302

NOT USED

D5305 C5321

SHORT

NOT USED NOT USED

R5308,R5309

1

ABCD EFGH

4-9 4-10

TUNER SCHEMATIC DIAGRAM [HR-J271MS,HR-J471MS]

4.5

NOTE :

When ordering parts,be sure to order according to the Part Number indicated in the Parts List.

MAIN [TUNER]

TO SYSCON

TO

5

10

OPEN

R6552 OPEN

OPEN

R6551 OPEN

0

OPEN

0.047

OPEN

UN5211

OPEN

4

0.01

0

B6051

OPEN

3

10

OPEN

100

OPEN

100/16

100

OPEN

100

OPEN

0

100P

0

100p

0

100p

100/16

OPEN

0

OPEN

UPC1854AGT

10/16

1/50

OPEN

L+R

LPF

0

OPEN

3.3/16

ST LPF

ST VCO

Off-set Absorption

10/16

OPEN

1/50

SAP

BPF

OPEN

0

OPEN

3k

OPEN

SW.REG

TO VIDEO/N.AUDIO

OPEN

4.7/25

OPEN

R6032

10/16

3.3k

2

0

TO SYSCON

0

OPEN

2SB1218A/RS

OPEN

0

OPEN

1k

OPEN

R6033

1.8k

OPEN

SHORT

270

OPEN

TO VIDEO/N.AUDIO

TO TERMINAL

1

OPEN

4-11 4-12

HGFEDCBA

DISPLAY AND MINI FRONT SCHEMATIC DIAGRAMS [HR-J271MS,HR-J471MS]

4.6

NOTE :

D7012 SLR-34DU3F

When ordering parts,be sure to order according to the Part Number indicated in the Parts List.

LED

330

D7013 SLR-342MG3F

TO SW.REG

TO SYSCON

OPEN

MAIN(DISPLAY

)

5

OPEN

1SS133

OPEN

SLR-325VC REC LINK

0.001

OPEN

330

4

OPEN

0.1

OPEN

SHORT

MINI FRONT

2.7k

4.7k

6.8k

FF

OPEN

REW

OPEN

3

FDP

0.022 47/6.3

0.022

GP1U291Q

220/6.3

OPEN

PLAY

OPEN

2

REC LINK

CH

SP/LP/EP

OPEN

0

OPEN

REC

OPEN

CH

OPEN

0

OPEN

0

PAUSEC.SYSTEM

OPEN

STOP/EJECT

KEY OUT

T6

GND T4

T3 T2

T1

JSB JSA

CN7008

SHUTTLE

1

UN7001

ABCD EFGH

4-13 4-14

4.7 BS CONNECTION AND LITHIUM BATTERY SCHEMATIC DIAGRAMS [HR-J271MS,HR-J471MS] 4.8 TERMINAL SCHEMATIC DIAGRAM [HR-J271MS,HR-471MS]

NOTE :

5

TO SW.REG

TO SYSCON

TO BS TUNER CN6203

4

TO BS TUNER

TO

VIDEO/AUDIO

CN6201 CN7102

BS AUDIO(L

BS AUDIO(R

When ordering parts,be sure to order according to the Part Number indicated in the Parts List.

TO SYSCON FW3002

06

)

TO SYSCON FW3001

PAUSE/COMP

TO SYSCON CN3007

OPEN

NOTE :

When ordering parts,be sure to order according to the Part Number indicated in the Parts List.

##

5

OPEN

##

OPEN

##

MAIN(TERMINAL

)

TO VIDEO/N.AUDIO

4

OPEN

100

OPEN

3

TO BS TUNER CN6202

BTT IN

BIT GND

DET IN

DET GND

BIT OUT

BIT GND

DET OUT

OPEN

BIT IN

BIT OUT

DET IN

DET OUT

3

TO SW.REG

TO TUNER

TO SYSCON

OPEN

2

2SA1576A/QRS

TO SYSCON

NOTE : Comparison chart of models & marks (#).

REF.NO. J7101 R912,R2602

M O

HR-J271MS NOT USED NOT USED

D E

HR-J471MS USED USED

L

1

DCBA

4-15 4-16

1

ABCD