JVC GR-DVL310U Diagram

SECTION 4

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.

K: KØ (1000Ø), M: MØ (1000KØ)

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.

4. Voltage measurement

1) Regulator (DC/DC CONV) circuits
REC : Colour bar signal.
PB : Alignment tape (Colour bar).
— : Unmeasurable or unnecessary to measure.

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

REC mode

12 3

2.5

(5.0)

PB mode

1.8

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

Note: If the voltages are not indicated on the schematic

diagram, refer to the voltage charts.

5. Signal path Symbols

The arrows indicate the signal path as follows.

NOTE : The arrow is DVC unique object.

Playback signal path

3. Interpreting Connector indications

1

2

Removable connector

3

1

2

Wire soldered directly on board

3

1

Non-removable Board connector

2

3

1

2

4

Board to Board

3

Connected pattern on board
The arrows indicate signal path

Playback and recording signal path

Recording signal path
(including E-E signal path)

Capstan servo path

Drum servo path

(Example)

R-Y

Playback R-Y signal path

Y

Recording Y signal path

6. Indication of the parts for adjustments

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

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

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

S40889-01

R216

OPEN

4-1

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.

2. Parts location guides

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

LOCATION

IC

Category : IC

Horizontal “A” zone

Vertical “6” zone

(A : Component side)

D : Discrete component)

B : Foil side

C : Chip component

REF No.

IC101 B C 6 A

Note: For general information in service manual, please

refer to the Service Manual of GENERAL INFORMA­TION Edition 4 No. 82054D (January 1994).

4-2

S40889-01

4.1 BOARD INTERCONNECTIONS

)

NOTE

: The number of patch cords

are indicated by interconnected.

YTU94074-20
YTU94077-20

ZOOM UNIT

(

)

Page 4-37

YTU94074-6

VTR CPU

XI1645SEL

YTU94077-6

JUNCTION

XI164SEL

VTR CPU

(

)

Page 4-9

MDA 3.0V

(

)

5

YTU94074-24
YTU94077-24

OP DRIVE

(

)

Page 4-23

4

Page 4-33

OP DRIVE

TG/VDRV

(

)

Page 4-25

REG 2.5V

(

)

Page 4-21

VTR CPU

OP DRIVE

SREELLED

(

(

Page 4-13

MDA 3.0V

Page 4-11

VTR CPU

)

)

(

)

Page 4-34

(

)

VTR CPU

CAM
DSP

)

Page 4-17

ZOOM

GND/DR GND

(

Page 4-15

YTU94074-15
YTU94077-15

RESET

RESET

)

VTR CPU

(

Page 4-27

D GAIN

VTR CPU

D GAIN

)

3

(

)

Page 4-5

(

)

)

Page 4-31
(

2

MODULE

)

MONITOR

(

Page 4-29

(

Page 4-29

)

VFREG4.8

BW Y

MON G

REG 4.8V

SDTIN

JIG

CVF G

VD

HD

NSLEED

BW VDD

(

Page 4-7

)

JLIP RX

JLIP TX

S DETS DET

(

Page 4-19

LCD

VD

HD

NC

NC

BW Y

NSLEEP

NC

YTU94074-20

NCNCNC

YTU94077-20

(

Page 4-35

)

1

(

DC INPUT CONN.

)

DC LIGHT

y10195001a rev0

ABCD EFGH

4-3 4-4

4.2 SYSCON SCHEMATIC DIAGRAM

NOTES :

For the destination of each signal and further line connections that are cut off from
this diagram,refer to "4.1 BOARD INTERCONNECTIONS".
When ordering parts,be sure to order according to the Part Number indicated in the Parts List.

TO REG

TO VTR CPU

PC IF

JIG CONN.

5

TO JACK
CN501

TO JACK
CN502

TO REG

TO PC IF

10

10

MAIN(SYSCON

VOUT

VCC

GND

NC

4

TO PC IF

)

150

220

0.1

0.1

TO VTR CPU

TO CAM DSP

TO REG

TO MONITOR
CN761

3

2

TO CAM DSP
TG/VDRV
AUDIO
OP DRIVE

TO TG/VDRV

TO CAM DSP

TO REG

TO AUDIO

TO MONITOR
CN761

TO OP DRIVE

TO JUNCTION
CN571

TO ZOOM UNIT

UPD70F3040F1A01
UPD703039F1-A01

0.1

1.8M

MB90097PFV139

TO REAR UNIT
CN1

TO CAM DSP

TO AUDIO

TO CAM DSP

TO
VOUT

1

NO WEAR

4-5 4-6

10k

y10187001a reV0

HGFEDCBA

4.3 PC IF SCHEMATIC DIAGRAM

NOTES :

For the destination of each signal and further line connections that are cut off from
this diagram,refer to "4.1 BOARD INTERCONNECTIONS".
When ordering parts,be sure to order according to the Part Number indicated in the Parts List.

5

4

3

TO SYSCON

2

TO JACK
CN501

TO JACK
CN501

RB501V 40-X

JIG CONN.

1

NO WEAR

ABCD EFGH

4-7 4-8

y30122001a rev0

4.4 VTR CPU SCHEMATIC DIAGRAM

NOTES :

For the destination of each signal and further line connections that are cut off from
this diagram,refer to "4.1 BOARD INTERCONNECTIONS".
When ordering parts,be sure to order according to the Part Number indicated in the Parts List.

TO REG

MAIN(VTR CPU

)

TO REG

5

TO CAM DSP

TO DV MAIN

,

TO DV MAIN
PRE/REC

JIG CONN.

TO JUNCTION
CN571

4

YQ44880A
MN103016KJJ
MN1030F04KYBJJ

TO
ROTARY ENCODER SW

TO MDA

TO JUNCTION
CN571

TO PRE/REC

3

2

1

TO SYSCON

TO SYSCON

TO SYSCON

TO SYSCON

TO REG

TO MDA

TC7W66FK

DTC144EE

MN103016KJH

SN74AHC2G53T

TO DV MAIN

TO DV MAIN

TO TG/VDRV

JIG CONN.

TO
ROTARY ENCODER SW

NO WEAR

4-9 4-10

TO REG

y10188001a rev0

HGFEDCBA

4.5 MDA SCHEMATIC DIAGRAM

NOTES :

For the destination of each signal and further line connections that are cut off from
this diagram,refer to "4.1 BOARD INTERCONNECTIONS".
When ordering parts,be sure to order according to the Part Number indicated in the Parts List.

5

4

TO VTR CPU

TO REG

TO VTR CPU

TO JUNCTION
CN571

MAIN(MDA

)

TO REG

TO VTR CPU

TO REG

TO VTR CPU

TO
CAPSTAN MOTOR

3

270

TO JUNCTION
CN571

TO VTR CPU

TO JUNCTION
CN571

2

TO JUNCTION
CN571

1

NO WEAR

ABCD EFGH

4-11 4-12

y20123001a rev1

4.6

AUDIO SCHEMATIC DIAGRAM

NOTES :

For the destination of each signal and further line connections that are cut off from
this diagram,refer to "4.1 BOARD INTERCONNECTIONS".
When ordering parts,be sure to order according to the Part Number indicated in the Parts List.

TO MONITOR
CN761

MAIN(AUDIO

)

22

5

TO
DV MAIN

TO

R

3.3k

SYSCON

4

TO

R

C2123

0.022

R

L

R

R

L

R

L

R

TO
REG

3

L

L

R R

L

L

2

C2124

0.022

R

L

R

L

TO JACK
CN502

L

0.022

L

3.3k

TO SYSCON

TO
CAM DSP

TO SYSCON

1

NO WEAR

4-13 4-14

y20125001a rev0

HGFEDCBA

4.7 DV MAIN SCHEMATIC DIAGRAM

NOTES :

For the destination of each signal and further line connections that are cut off from
this diagram,refer to "4.1 BOARD INTERCONNECTIONS".
When ordering parts,be sure to order according to the Part Number indicated in the Parts List.

(

DV MAIN

)

5

TO REG

TO
CAM DSP

C

C

C

C

Y

Y

Y

Y

C

C

C

C

4

Y

Y

Y

Y

C

C

C

C

Y

Y

Y

Y

C

C

C

C

Y

Y

Y

Y

TO
AUDIO

TO
VTR CPU

TO TG/VDRV

3

2

TO
PRE/REC

TO
CAM DSP

JIG CONN.

1

NO WEAR

ABCD EFGH

4-15 4-16

y10189001a rev0

4.8 PRE/REC SCHEMATIC DIAGRAM

NOTES :

For the destination of each signal and further line connections that are cut off from
this diagram,refer to "4.1 BOARD INTERCONNECTIONS".
When ordering parts,be sure to order according to the Part Number indicated in the Parts List.

5

TO
VTR CPU

JIG CONN.

4

TO CAM DSP

TO HEAD

3

TO DV MAIN

2

TO REG

1

NO WEAR

4-17 4-18

y20126001a rev0

HGFEDCBA

4.9 V OUT SCHEMATIC DIAGRAM

NOTES :

For the destination of each signal and further line connections that are cut off from
this diagram,refer to "4.1 BOARD INTERCONNECTIONS".
When ordering parts,be sure to order according to the Part Number indicated in the Parts List.

5

TO REG

4

Y Y

3

Y

TO CAM DSP

C

Y

C

CC

TO JACK
CN502

2

TO SYSCON

1

NO WEAR

ABCD EFGH

4-19 4-20

y30124001a rev0