JVC GRDVM90U - Service Manual Immediate Download

JVC SERVICE & ENGINEERING COMPANY OF AMERICA

DIVISION OF JVC AMERICAS CORP.

Head office

East Coast

Midwest

West Coast

Atlanta

Hawaii

1700 Valley Road Wayne, New Jersey 07470-9976

10 New Maple Avenue Pine Brook, New Jersey 07058-9641

705 Enterprise Street Aurora, Illinois 60504-8149

5665 Corporate Avenue Cypress, California 90630-0024

1500 Lakes Parkway Lawrenceville, Georgia 30043-5857

2969 Mapunapuna Place Honolulu, Hawaii 96819-2040

(973)315-5000

(973)396-1000

(630)851-7855

(714)229-8011

(770)339-2582

(808)833-5828

JVC CANADA INC.

Head office

Montreal

Vancouver

21 Finchdene Square Scarborough, Ontario M1X 1A7

16800 Rte Trans-Canadienne, Kirkland, Quebec H9H 5G7

13040 Worster Court Richmond, B.C. V6V 2B3

(416)293-1311

(514)871-1311

(604)270-1311

Printed in Japan

S40895-03

DIGITAL VIDEO CAMERA

GR-DVM90U

No. 86565

June 2000

This service manual is printed on 100% recycled paper.

SPECIFICATIONS

For Connectors

Video output

:1 V (p-p), 75

, analog

Audio output

: 300 mV (rms), 1 k

, analog, stereo

DV Input/output

: 4-pin, IEEE 1394 compliant

Headphone output

: ø3.5 mm, stereo

AC Power Adapter/Charger AA-V51U

Power requirement

U.S.A. and Canada

: AC 120 V`, 60 Hz

Other countries

: AC 110 V to 240 V`, 50 Hz/60 Hz

Power consumption

: 23 W

Output

Charge

: DC 7.2 V

, 0.77 A

VTR

: DC 6.3 V

, 1.8 A

Dimensions (W x H x D)

: 68 mm x 45 mm x 110 mm (2-11/16" x 1-13/16" x 4-3/8")

Weight

: Approx. 254.5 g (0.57 lbs)

Docking Station

For General

Dimensions (W x H x D)

: 55 mm x 36 mm x 107 mm (2-3/16" x 1-7/16" x 4-1/4")

Weight

: Approx. 89.9 g (0.2 lbs)

For Connectors

S-Video

: Y: 1 V (p-p), 75

, analog output

C: 0.29 V (p-p), 75

, analog output

Video

: 1 V (p-p), 75

, analog output

Audio

: 300 mV (rms), 1 k

, analog output

JLIP/EDIT

: ø3.5 mm, 4-pole, mini-head jack (compatible with RC-5325

plug)

: ø2.5 mm, 3-pole

External microphone input

: 506

µV (rms), high impedance unbalanced with ø3.5 mm

(stereo)

PRINTER

: For an optional video printer equipped with a PRINT DATA

connector

Specifications shown are for SP mode unless otherwise indicated. E & O.E. Design and specifications

subject to change without notice.

Camcorder

For General

Power supply

: DC 6.3 V

(Using AC Power Adapter/Charger)

DC 7.2 V

(Using battery pack)

Power consumption

LCD monitor off, viewfinder on

: Approx. 4.6 W

LCD monitor on, viewfinder off

: Approx. 5.5 W

Dimensions (W x H x D)

: 51 mm x 125 mm x 97 mm (2-1/16" x 4-15/16" x 3-7/8")

(with the LCD monitor closed and the viewfinder pushed

back in)

Weight

: Approx. 510 g (1.2 lbs)

(without cassette, MultiMediaCard and battery)

Approx. 585 g (1.3 lbs)

(incl. cassette, MultiMediaCard and battery)

Operating temperature

°C to 40°C (32°F to 104°F)

Operating humidity

: 35% to 80%

Storage temperature

: 20

°C to 50°C (4°F to 122°F)

Pickup

: 1/4" CCD (Progressive Scan)

Lens

: F 1.8, f = 3.8 mm to 38 mm, 10:1 power zoom lens

Filter diameter

: ø27 mm

LCD monitor

: 2.5" diagonally measured, LCD panel/TFT active matrix

system

Viewfinder

: Electronic viewfinder with 0.55" color LCD

Speaker

: Monaural

For Digital Video Camera

Format

: DV format (SD mode)

Signal format

: NTSC standard

Recording/Playback format

: Video: Digital component recording

: Audio: PCM digital recording, 32 kHz 4-channel (12-bit),

48 kHz 2-channel (16-bit)

Cassette

: Mini DV cassette

Tape speed

: SP: 18.8 mm/s

LP: 12.5 mm/s

Maximum recording time

: SP: 80 min.

(using 80 min. cassette)

LP: 120 min.

For Digital Still Camera

Storage media

: MultiMediaCard

Compression system

: JPEG (compatible)

File size

: 2 modes (XGA: 1024 x 768 pixels/VGA: 640 x 480 pixels)

Picture quality

: 2 modes (FINE/STANDARD)

Approximate number of storable images

(with the provided MultiMediaCard [8 MB], with Sound Effects pre-stored)

FINE

: 46 (VGA), 21 (XGA)

STANDARD

: 133 (VGA), 64 (XGA)

(with an optional MultiMediaCard [4 MB])

FINE

: 26 (VGA), 12 (XGA)

STANDARD

: 76 (VGA), 36 (XGA)

(with an optional MultiMediaCard [8 MB])

FINE

: 54 (VGA), 24 (XGA)

STANDARD

: 155 (VGA), 75 (XGA)

GR-DVM90U

No.

86565

TABLE OF CONTENTS

Section

Title

Page

Important Safety Precautions

INSTRUCTIONS

1. DISASSEMBLY

1.1

BEFORE ASSEMBLY AND DISASSEMBLY ................................. 1-1

1.1.1

Precautions .......................................................................... 1-1

1.1.2

Assembly and disassembly ................................................. 1-1

1.1.3

Destination of connectors .................................................... 1-1

1.1.4

Disconnection of Connectors (Wires) .................................. 1-1

1.2

JIGS AND TOOLS REQUIRED FOR DISASSEMBLY,

ASSEMBLY AND ADJUSTMENT ................................................. 1-2

1.2.1

Tools required for adjustments ............................................. 1-2

1.3

DISASSEMBLY/ASSEMBLY OF CABINET PARTS AND

BOARD ASSEMBLY ..................................................................... 1-3

1.3.1

Disassembly flow chart ........................................................ 1-3

1.3.2

Disassembly method (I) ....................................................... 1-4

1.4

DISASSEMBLY OF 4 MONITOR ASSEMBLY ............................ 1-8

1.4.1

4 Monitor assembly/Hinge assembly .................................. 1-8

1.4.2

Hinge assembly ................................................................... 1-8

1.5

DISASSEMBLY 0 E VF ASSEMBLY ........................................... 1-9

1.5.1

0 E. VF assembly ............................................................... 1-9

1.6

DISASSEMBLY OF 7 OP BLOCK ASSEMBLY/CCD

BOARD ASSEMBLY ................................................................... 1-10

1.6.1

Precautions ........................................................................ 1-10

1.6.2

How to remove OP block assembly and CCD board

assembly ............................................................................ 1-10

1.6.3

How to install OP block assembly and CCD board

assembly ............................................................................ 1-10

1.6.4

Replacement of service parts ............................................ 1-10

1.7

HOW TO TAKE OUT CASSETTE TAPE MANUALLY ................ 1-11

1.8

SERVICE NOTE ......................................................................... 1-12

1.9

EMERGENCY DISPLAY ............................................................. 1-13

2. MECHANISM ADJUSTMENT

2.1

PRELIMINARY REMARKS ON ADJUSTMENT AND REPAIR ..... 2-1

2.1.1

Precautions .......................................................................... 2-1

2.1.2

Notes on procedure for disassembly/assembly ................... 2-1

2.2

DISASSEMBLY/ASSEMBLY OF MECHANISM ASSEMBLY ........ 2-2

2.2.1

General statement ............................................................... 2-2

2.2.2

Explanation of mechanism mode ......................................... 2-2

2.2.3

Mechanism timing chart ....................................................... 2-3

2.2.4

Disassembly/assembly of mechanism assembly ................. 2-4

2.2.5

Disassembly/assembly ........................................................ 2-7

2.2.6

List of procedures for disassembly .................................... 2-13

2.2.7

Checkup and adjustment of mechanism phase ................. 2-14

2.2.8

Assembling slide deck assembly and main deck

assembly ............................................................................ 2-15

2.2.9

Locating tension pole ......................................................... 2-16

2.3

SERVICE NOTE ......................................................................... 2-17

2.4

JIG CONNECTOR CABLE CONNECTOR ................................. 2-19

3. ELECTRICAL ADJUSTMENT

3.1

PREPARATION ............................................................................ 3-1

3.2

SETUP .......................................................................................... 3-1

3.3

FUSE LOCATION ......................................................................... 3-2

3.3.1

MAIN PWB (FOIL SIDE) ...................................................... 3-2

3.3.2

MAIN PWB (COMPONENT SIDE) ...................................... 3-2

3.3.3

MONITOR PWB (COMPONENT SIDE) ............................... 3-3

4. CHARTS AND DIAGRAMS

NOTES OF SCHEMATIC DIAGRAM ............................................ 4-1

CIRCUIT BOARD NOTES ............................................................ 4-2

4.1

BOARD INTERCONNECTIONS ................................................... 4-3

4.2

CPU SCHEMATIC DIAGRAM ...................................................... 4-5

4.3

MSD CPU SCHEMATIC DIAGRAM ............................................. 4-7

4.4

A/HP SEL SCHEMATIC DIAGRAM .............................................. 4-9

4.5

DVMAIN SCHEMATIC DIAGRAM .............................................. 4-11

4.6

PHY SCHEMATIC DIAGRAM ..................................................... 4-13

4.7

DVEQ/DVANA SCHEMATIC DIAGRAM ..................................... 4-15

4.8

PRE/REC SCHEMATIC DIAGRAM ............................................ 4-17

4.9

VIDEO SCHEMATIC DIAGRAM ................................................. 4-19

4.10 CDS SCHEMATIC DIAGRAM .................................................... 4-21

4.11 DSP SCHEMATIC DIAGRAM ...................................................... 4-23

4.12 TG/VDR SCHEMATIC DIAGRAM .............................................. 4-25

4.13 REG CTL SCHEMATIC DIAGRAM ............................................. 4-27

4.14 REGULATOR SCHEMATIC DIAGRAM ...................................... 4-29

4.15 STROBE SUB SCHEMATIC DIAGRAM ..................................... 4-31

4.16 DSC SCHEMATIC DIAGRAM .................................................... 4-33

4.17

AU DSP SCHEMATIC DIAGRAM .............................................. 4-35

4.18

B/W AND IR/TALLY SCHEMATIC DIAGRAMS .......................... 4-37

4.19 MDA SCHEMATIC DIAGRAMS .................................................. 4-39

4.20 IRIS & AF/ZOOM SCHEMATIC DIAGRAM ................................ 4-41

4.21 CCD SCHEMATIC DIAGRAM .................................................... 4-43

4.22 MONITOR A SCHEMATIC DIAGRAM ........................................ 4-45

4.23 MMC, W/B SENS AND EJECT SCHEMATIC DIAGRAMS ......... 4-47

4.24 STROBE SCHEMATIC DIAGRAM ............................................. 4-49

4.25 AUDIO AD/DA SCHEMATIC DIAGRAM ..................................... 4-51

4.26 MAIN AUDIO SCHEMATIC DIAGRAM ....................................... 4-53

4.27 AU NR SCHEMATIC DIAGRAM ................................................. 4-55

4.28 VF A SCHEMATIC DIAGRAM .................................................... 4-57

4.29 JACK SCHEMATIC DIAGRAM ................................................... 4-59

4.30 CAMERA OPE UNIT, SUB OPE ASSY, ZOOM UNIT

AND DECK OPE UNIT SCHEMATIC DIAGRAMS .................... 4-61

4.31 MAIN CIRCUIT BOARD ............................................................. 4-63

4.32 MDA AND CCD CIRCUIT BOARD ............................................. 4-69

4.33 MONITOR CIRCUIT BOARD ..................................................... 4-71

4.34 MMC AND STROBE CIRCUIT BOARD ...................................... 4-73

4.35 AUDIO VF CIRCUIT BOARD ..................................................... 4-75

4.36 JACK, W/B AND EJECT CIRCUIT BOARD ................................ 4-77

4.37 POWER SYSTEM BLOCK DIAGRAM ....................................... 4-79

4.38 VIDEO SYSTEM BLOCK DIAGRAM .......................................... 4-81

4.39 REGULATOR SYSTEM BLOCK DIAGRAM ............................... 4-83

4.40 VOLTAGE CHARTS .................................................................... 4-85

5. PARTS LIST

5.1

PACKING AND ACCESSORY ASSEMBLY <M1> ........................ 5-1

5.2

FINAL ASSEMBLY <M2> .............................................................. 5-3

5.3

MECHANISM ASSEMBLY <M3> .................................................. 5-6

5.4

ELECTRONIC VIEWFINDER ASSEMBLY <M4> ......................... 5-8

5.5

MONITOR ASSEMBLY <M5> ....................................................... 5-9

5.6

ELECTRICAL PARTS LIST ........................................................ 5-10

MAIN BOARD ASSEMBLY <01> ................................................ 5-10

MDA BOARD ASSEMBLY <02> ................................................. 5-20

CCD BOARD ASSEMBLY <03> ................................................ 5-21

MONITOR BOARD ASSEMBLY <04> ........................................ 5-22

MMC BOARD ASSEMBLY <06> ................................................ 5-23

STROBE BOARD ASSEMBLY <07> .......................................... 5-23

AUDIO VF BOARD ASSEMBLY <08> ........................................ 5-24

JACK BOARD ASSEMBLY <09> ................................................ 5-26

W/B BOARD ASSEMBLY <11> ................................................. 5-26

EJECT BOARD ASSEMBLY <12> .............................................. 5-26

6. AC POWER ADAPTER (AA-V51U)

6.1

CABINET ASSEMBLY <MA> ........................................................ 6-1

6.2

SCHEMATIC DIAGRAM ............................................................... 6-2

6.3

CIRCUIT BOARD ......................................................................... 6-4

6.4

ELECTRICAL PARTS LIST .......................................................... 6-5

Section

Title

Page

Important Safety Precautions

Prior to shipment from the factory, JVC products are strictly inspected to conform with the recognized product safety and electrical codes

of the countries in which they are to be sold. However, in order to maintain such compliance, it is equally important to implement the

following precautions when a set is being serviced.

1. Locations requiring special caution are denoted by labels and

inscriptions on the cabinet, chassis and certain parts of the

product. When performing service, be sure to read and com-

ply with these and other cautionary notices appearing in the

operation and service manuals.

2. Parts identified by the

symbol and shaded (

) parts are

critical for safety.

Replace only with specified part numbers.

Note: Parts in this category also include those specified to com-

ply with X-ray emission standards for products using

cathode ray tubes and those specified for compliance

with various regulations regarding spurious radiation

emission.

3. Fuse replacement caution notice.

Caution for continued protection against fire hazard.

Replace only with same type and rated fuse(s) as specified.

4. Use specified internal wiring. Note especially:

1) Wires covered with PVC tubing

2) Double insulated wires

3) High voltage leads

5. Use specified insulating materials for hazardous live parts.

Note especially:

1) Insulation Tape

3) Spacers

5) Barrier

2) PVC tubing

4) Insulation sheets for transistors

6. When replacing AC primary side components (transformers,

power cords, noise blocking capacitors, etc.) wrap ends of

wires securely about the terminals before soldering.

10. Also check areas surrounding repaired locations.

11. Products using cathode ray tubes (CRTs)

In regard to such products, the cathode ray tubes themselves,

the high voltage circuits, and related circuits are specified for

compliance with recognized codes pertaining to X-ray emission.

Consequently, when servicing these products, replace the cath-

ode ray tubes and other parts with only the specified parts.

Under no circumstances attempt to modify these circuits.

Unauthorized modification can increase the high voltage value

and cause X-ray emission from the cathode ray tube.

12. Crimp type wire connector

In such cases as when replacing the power transformer in sets

where the connections between the power cord and power

transformer primary lead wires are performed using crimp type

connectors, if replacing the connectors is unavoidable, in or-

der to prevent safety hazards, perform carefully and precisely

according to the following steps.

1) Connector part number : E03830-001

2) Required tool : Connector crimping tool of the proper type

which will not damage insulated parts.

3) Replacement procedure

(1) Remove the old connector by cutting the wires at a point

close to the connector.

Important : Do not reuse a connector (discard it).

Fig.7

Fig.3

(2) Strip about 15 mm of the insulation from the ends of

the wires. If the wires are stranded, twist the strands to

avoid frayed conductors.

Fig.4

(3) Align the lengths of the wires to be connected. Insert

the wires fully into the connector.

Fig.5

(4) As shown in Fig.6, use the crimping tool to crimp the

metal sleeve at the center position. Be sure to crimp fully

to the complete closure of the tool.

Precautions during Servicing

7. Observe that wires do not contact heat producing parts

(heatsinks, oxide metal film resistors, fusible resistors, etc.)

8. Check that replaced wires do not contact sharp edged or

pointed parts.

9. When a power cord has been replaced, check that 10-15 kg of

force in any direction will not loosen it.

Fig.6

(5) Check the four points noted in Fig.7.

Not easily pulled free

Crimped at approx. center

of metal sleeve

Conductors extended

Wire insulation recessed

more than 4 mm

S40888-01

Fig.1

Power cord

Fig.2

cut close to connector

15 mm

Connector

Metal sleeve

1.25

2.0

5.5

Crimping tool

Safety Check after Servicing

Examine the area surrounding the repaired location for damage or deterioration. Observe that screws, parts and wires have been

returned to original positions, Afterwards, perform the following tests and confirm the specified values in order to verify compli-

ance with safety standards.

1. Insulation resistance test

Confirm the specified insulation resistance or greater between power cord plug prongs and

externally exposed parts of the set (RF terminals, antenna terminals, video and audio input

and output terminals, microphone jacks, earphone jacks, etc.). See table 1 below.

2. Dielectric strength test

Confirm specified dielectric strength or greater between power cord plug prongs and exposed

accessible parts of the set (RF terminals, antenna terminals, video and audio input and output

terminals, microphone jacks, earphone jacks, etc.). See table 1 below.

3. Clearance distance

When replacing primary circuit components, confirm specified clearance distance (d), (d') be-

tween soldered terminals, and between terminals and surrounding metallic parts. See table 1

below.

4. Leakage current test

Confirm specified or lower leakage current between earth ground/power cord plug prongs

and externally exposed accessible parts (RF terminals, antenna terminals, video and audio

input and output terminals, microphone jacks, earphone jacks, etc.).

Measuring Method : (Power ON)

Insert load Z between earth ground/power cord plug prongs and externally exposed accessi-

ble parts. Use an AC voltmeter to measure across both terminals of load Z. See figure 9 and

following table 2.

5. Grounding (Class 1 model only)

Confirm specified or lower grounding impedance between earth pin in AC inlet and externally exposed accessible parts (Video in,

Video out, Audio in, Audio out or Fixing screw etc.).

Measuring Method:

Connect milli ohm meter between earth pin in AC inlet and exposed accessible parts. See figure 10 and grounding specifications.

Region

USA & Canada

Europe & Australia

Grounding Impedance (Z)

0.1 ohm

0.5 ohm

AC inlet

Earth pin

Exposed accessible part

Milli ohm meter

Grounding Specifications

Fig. 10

Clearance Distance (d), (d')

d, d'

3 mm

d, d'

4 mm

d, d'

3.2 mm

1 M

R 12 M/500 V DC

Dielectric Strength

AC 1 kV 1 minute

AC 1.5 kV 1 miute

AC 1 kV 1 minute

AC Line Voltage

100 V

100 to 240 V

110 to 130 V

200 to 240 V

Japan

USA & Canada

Europe & Australia

10 M

/500 V DC

Region

Insulation Resistance (R)

1 M

/500 V DC

AC 3 kV 1 minute

(Class

AC 1.5 kV 1 minute

(Class

4 mm

8 mm (Power cord)

6 mm (Primary wire)

Table 1 Specifications for each region

a, b, c

Leakage Current (i)

AC Line Voltage

100 V

110 to 130 V

220 to 240 V

Japan

USA & Canada

1 mA rms

Exposed accessible parts

Antenna earth terminals

Other terminals

0.5 mA rms

0.7 mA peak

2 mA dc

0.7 mA peak

2 mA dc

Europe & Australia

Region

Load Z

1 k

2 k

1.5 k

0.15

µF

50 k

Table 2 Leakage current specifications for each region

Note: These tables are unofficial and for reference only. Be sure to confirm the precise values for your particular country and locality.

S40888-01

Chassis

Power cord,

primary wire

Fig. 8

Externally

exposed

accessible part

Fig. 9

1-1

1.1.4 Disconnection of Connectors (Wires)

Connector

Pull both ends of the connector in the arrow direction, re-

move the lock and disconnect the flat wire.

Fig. 1-1-1 Connector 1

Extend the locks in the direction of the arrow for unlocking

and then pull out the wire. After removing the wire, immedi-

ately restore the locks to their original positions because the

locks are apt to come off the connector.

Fig. 1-1-2 Connector 2

(1)

Indicate the disassembly steps. When assembling, per-

form in the reverse order of these steps. This number

corresponds to the number in the disassembly diagram.

(2)

Indicates the name of disassembly/assembly parts.

(3)

Indicates the number in the disassembly diagram.

(4)

Indicates parts and points such as screws, washers,

springs which must be removed during disassembly/

assembly.

Symbol

Name, Point

Screw

Lock, Pawl, Hook

Soldering

(Others) Connector, Cover, Bracket, etc.

(Example)

· 2 (S1): Remove the two screws (S1) for removing the

part 1.

· CN A : Disconnect the connector A.

· SD1 : Unsolder at the point SD1.

(5)

Precautions on disassembly/assembly.

SECTION 1

DISASSEMBLY

1.1 BEFORE ASSEMBLY AND DISASSEMBLY

1.1.1 Precautions

1. Be sure to remove the power supply unit prior to mount-

ing and soldering of parts.

2. When removing a component part that needs to disconnect

the connector and to remove the screw for removing itself,

first disconnect the connecting wire from the connector and

then remove the screw beforehand.

3. When connecting and disconnecting the connectors, be

careful not to damage the wire.

4. Carefully remove and handle the part to which some

spacer or shield is attached for reinforcement or

insulation.

5. When replacing chip parts (especially IC parts), desolder

completely first (to prevent peeling of the pattern).

6. Tighten screws properly during the procedures.

Unless specified otherwise, tighten screws at a torque

of 0.078N·m (0.8kgf·cm).

1.1.2 Assembly and disassembly

Connector

Flat wire

Connector

Flat wire

Fig. 1-1-4 Connector 4

B-B connector

Pull the board by both the sides in the direction of the ar-

row for disconnecting the B-B connector

Connector

Fig. 1-1-3 Connector 3

1.1.3 Destination of connectors

Note:

Three kinds of double-arrows in connection tables re-

spectively show kinds of connector/wires.

: Wire

: Flat wire

: Board to Board connector

[Example]

CONN.

CONNECTOR

Pin No.

No.

DECK OPE ASSY

AUDIO VF

CN803

(1)

(2)

(3)

(4)

(5)

DECK OPE ASSY

Fig.1-3-1

2(S1), (L1)

CN A

FRONT COVER

(S2a), (S2b), 2(S2c), (S2d)

ASSY

(S2e), (S2f), (L2)

CN B

STEP

PART

Fig No.

POINT

NOTE

No.