JVC HR-J686EN, HR-J686M 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

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).

OPEN

4-2

S40884-03

4.1

BOARD INTERCONNECTIONS

(

OPEN

REAR OUT

5

BIT IN/OUT DET IN/OUT

J6201

J6202

VIDEO

AUDIO(R

J2

)

AUDIO(L

REAR1 IN

AUDIO(R

J1

)

AUDIO(L

)

VIDEO

60

AV.COMPU

J7104

Page 4-15

BACKUP

4

J7105

C.BOXCTL

LEDRETURN

OPEN

(

VIDEO/AUDIO

(

SYSCON

(

SW.REG

(

TUNER/DEMOD

(

DISPLAY

(

BS CONNECTION

(

TERMINAL

Page 4-5 Page 4-7

Page 4-9 Page 4-11 Page 4-13 Page 4-15 Page 4-16

) ) ) ) ) ) )

)

AC110-220V

50/60Hz

OPEN

BSP.CTL

I2CDATA

I2CCLK

BITIN(H

ANTCTL(L

BSANT

CN7102

BS VIDEO

BS AUDIO(L

BS AUDIO(R

CN6204

DET OUT

BIT GND

BIT OUT

DET GND

DET IN

BIT GND

BIT IN

CN7001

BS-IF

OUT

IN

CN6203

BSP.CTL

I2CDATA

I2CCLK )

)

1

2

3

4

5

6

7

BITIN(H

ANTCTL(L

BS ANT

CN6201

BSVIDEO

BSAUDIO(L

BSAUDIO(R

CN6202

7

DET OUT

6

BIT GND

5

BIT OUT

DET GND

4

DET IN

3

BIT GND

2

1

BIT IN

)

58

SHUTTLE

(

Page 4-14

)

ANT IN

ANT OUT

)

) H

(

SW5V

(

CONV.CTL

MOD B

2627282930313233343536373839404142

TUNER (

Page 4-11

TP

43

4445464748

FRONT VIDEO

FRONT AUDIO

J7101

)

49

3

OPEN

ONLY USED FOR HR-J686EN

MINI FRONT

(

Page 4-14

OPEN

2

) L

(

CAP REV

CAP FG

EP/LP

DRUM CTL V

EP/LP

CAP CTL V

M12V

9

8

7

6

5

4

3

2

1

ONLY USED FOR HR-J686M

CON1

93

LT BATTERY

85

1

SHUTTLE

28

MINI FRONT

EP/LPEP/LP

)

4-44-3

HGFEDCBA

4.2 VIDEO/AUDIO SCHEMATIC DIAGRAM

NOTE :

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

5

4

3

2

TO BS CONNECTION

TO TERMINAL

TO TUNER/DEMOD

TO SYSCON

TO SW.REG

TO U.DRUM

OPEN

EP/LP CH2

EP/LP CH1

TO SYSCON

TO A/C HEAD CN1

TO FULL ERASE HEAD

TO SYSCON

MAIN(VIDEO/AUDIO

L

R

L

R

1SS133

L

R

)

1k

#

1k

#

L

R

#

3.3k

#

3.3k

L

JCP8020-MSB

OPEN

WF1

OPEN

R

L

R

L

R

Y

#

0.01

R

A.PB.FM

WF13

WF11

#

Q2

#

Q1 2SC4081/S

##

# Q3 2SC4081/S

WF15

2SC4081/S

Q4 2SC4081/S

PB.FM

#

WF14

OPEN

#

C70

C69

470p

WF12

#

OPEN

WF10

OPEN

R

L

R

C

Y

WF3

WF2

Y

L

OPEN

L

R

HIFI MODEL HIFI MODEL

C

Y

2.2M

C

OPEN

2.2M

0.1/50

L

0.1/50

#

R

#

WF9

R

L

C

Y

C

WF6

C

WF4

WF5

C

#

2.2k1k2.2k

#

1k

#

0.47/50 0.47/50

R

L

1/50

WF8

WF7

#

100k

C

0

330

68

15p

UN521E

OPEN

#

SHORT

B36 OPEN

0.01

OPEN

#

DTC144WUA

#

DTC144WUA

#

0.047

OPEN

#

OPEN

Q12 2SA1576A /QR

#

0

R

TO SYSCON

L

R-Y REV

KILLER OUT

(NC)

0

1SS133

1

NOTES : 1. For VIDEO/AUDIO waveforms,please refer to page 4-20.

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

REF.NO

M

HR-J686M

O

D E

HR-J686EN

L

R21,R22

NOT USED

USED

R67,R2004

USED

NOT USED

ABCD EFGH

1SS133

R2015 R2017

180

120

R2053

15k

22k USED

4.7k

6.8k

4-5 4-6

R2202 R2205

NOT USED

R2207

USED

NOT USED NOT USED NOT USED NOT USED

Y

C1-C4

C29

0.0681

0.01 0.033

C35

0.01

0.1

C69,C70,C2209-C2212

C55 L2

USED

NOT USED

SHORT

USED

100

Q1 Q4

NOT USED

USED

Q13,Q25,Q27

USED

D3

USED

4.3 SYSTEM CONTROL SCHEMATIC DIAGRAM

TO SW.REG

NOTE :

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

TO CAP MDA

WF3

5

ICP-N25

AL5V

TO DISPLAY

4

TO TUNER/DEMOD

NC

3

TO MV ADV

TO VIDEO/AUDIO

0.01

#

10k10k

L

R

L

R

2SC4081 2SC4081

DTC114EUA

OPEN OPEN

OPEN

/QRS

R

L

1k

1SS133

1k

4.7k

OPEN

#

OPEN

SHORT

OPEN

1k

#

OPEN

#

1k

OPEN

#

1k

#

1k

4.7k

OPEN

0.01

1k

#

WF7

WF6

WF5

WF4

33/6.3

47/6.3

SHORT

OPEN

100

100p

0.0022

OPEN

0.01

0

0.01

OPEN

Vref

OPEN

OUT 2

W9 0

RD33ES/B2

GND

1SS1355

1000/6.3

OUT 1

/QRS

OPEN

1k

RB721Q-40

BA6956AN

IN 2

IN 1

GND

Vcc

UN521K

TO DRUM MOTOR CON1

WF2

WF1

TO LT BATTERY FW7106

BACK UP

TO R.PAUSE FW7104

TO C.BOX CTL FW7105

OPEN

0.01

2

0.01

TO BS CONNECTION

0.01

1SS133

OPEN

0.01

(

14.32MHz

(

)

18p

32KHz

C3018 : Timer clock

C3055

OPEN

)

10p

18p

OPEN

M24C02-BN6

4.7k

KILLER OUT

TO VIDEO/AUDIO

TO TERMINAL

TO VIDEO/AUDIO

1

NOTES : 1. For SYSCON waveforms,please refer to page 4-20.

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

REF.NO.

M

HR-J686M

O D

E

HR-J686EN

L

IC3001

MN101D02GJK

MN101D02GJT

R3013,R3078

USED

NOT USED

ABCD EFGH

R3019,R3020,R3088,R3089 R3099,R3100,R3240,R3241

NOT USED

USED

4-7 4-8

R-Y REV

I2C CLK I2C DATA