JVC GRDVM75U - Service Manual Immediate Download

SERVICE MANUAL

No. 86615

March 2001

GR-DVM55U/DVM75U

SPECIFICATIONS

DIGITAL VIDEO CAMERA

Printed in Japan

This service manual is printed on 100% recycled paper.

GR-DVM55U/DVM75U

No.

86615

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

S40895-03

Camcorder

For General

Power supply

: DC 11.0 V } (Using AC Adapter)

DC 7.2 V } (Using battery pack)

Power consumption

LCD monitor off, viewfinder on

: Approx. 4.4 W (GR-DVM75), Approx. 4.0 W (GR-DVM55)

LCD monitor on, viewfinder off

: Approx. 5.2 W (GR-DVM75), Approx. 4.8 W (GR-DVM55)

Dimensions (W x H x D)

: 97 mm x 120 mm x 51 mm (3-7/8" x 4-3/4" x 2-1/16")

(with the LCD monitor closed and the viewfinder pushed back in)

Weight

: Approx. 500 g (1.1 lbs) (GR-DVM75)

Approx. 470 g (1.1 lbs) (GR-DVM55)

Operating temperature

: 0°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

Lens

: F 1.8, f = 3.6 mm to 36 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 0.44" colour 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 (GR-DVM75 only)

Storage media

: SD Memroy Card/MultiMediaCard

Compression system

: Still image : JPEG (compatible)

Moving image : MPEG4 (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 memory card [8 MB], with Sound Effects pre-stored)

FINE

: 40 (VGA), 20 (XGA)

STANDARD

: 130 (VGA), 60 (XGA)

(with an optional memory card [16 MB])

FINE

: 100 (VGA), 40 (XGA)

STANDARD

: 290 (VGA), 140 (XGA)

(with an optional memory card [32 MB])

FINE

: 210 (VGA), 90 (XGA)

STANDARD

: 610 (VGA), 290 (XGA)

(with an optional memory card [64 MB])

FINE

: 430 (VGA), 190 (XGA)

STANDARD

: 1230 (VGA), 600 (XGA)

For Connectors

Video output

: 1 V (p-p), 75

, analog

Video input (GR-DVM75 only)

: 0.8 V (p-p) 1.2 V (p-p), 75

, analog

Audio output

: 300 mV (rms), 1 k

, analog, stereo

Audio input (GR-DVM75 only)

: 300 mV (rms), 50 k

, analog, stereo

Headphone output (GR-DVM75 only) : Stereo

Input/output

: 4-pin, IEEE 1394 compliant

AC adapter AP-V10U

Power requirement

U.S.A. and Canada

: AC 120 V`, 60 Hz

Other countries

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

Output

: DC 11 V }, 1 A

Dimensions (W x H x D)

: 59 mm x 31 mm x 84 mm (2-3/8" x 1-1/4" x 3-5/16")

Weight

: Approx. 130 g (0.29 lbs)

Jack Box

For General

Dimensions (W x H x D)

: 52 mm x 22 mm x 73 mm (2-1/16" x 7/8" x 2-7/8")

Weight

: Approx. 35 g (0.78 lbs)

For Connectors

USB (GR-DVM75 only)

: Type B

EDIT (GR-DVM75 only)

: ø3.5 mm, 2-pole

S-Video

Output

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

, analog

C : 0.29 V (p-p), 75

, analog

Input (GR-DVM75 only)

: Y : 0.8 V (p-p) 1.2 V (p-p), 75

, analog

C : 0.2 V (p-p) 0.4 V (p-p), 75

, analog

JLIP (GR-DVM55 only)

: ø3.5 mm, 4-pole

PC (DIGITAL PHOTO)

(GR-DVM55 only)

: ø2.5 mm, 3-pole

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

to change without notice.

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

1.3.1

Disassembly flow chart ......................................................... 1-2

1.3.2

Disassembly method ............................................................ 1-3

1.4 DISASSEMBLY OF 5 MONITOR ASSEMBLY ............................. 1-8

1.4.1

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

1.4.2

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

1.5 DISASSEMBLY OF 7 OP BLOCK ASSEMBLY/CCD BOARD

ASSEMBLY .................................................................................. 1-9

1.5.1

Precautions ........................................................................... 1-9

1.5.2

How to remove OP block assembly and CCD board assembly 1-9

1.5.3

How to install OP block assembly and CCD board assembly 1-9

1.5.4

Replacement of service parts ............................................... 1-9

1.6 DISASSEMBLY OF 9 E VF ASSEMBLY .................................... 1-10

1.6.1

9 E VF assembly ................................................................ 1-10

1.7 EMERGENCY DISPLAY ............................................................ 1-11

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

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 disassemby/assembly ..................... 2-1

2.2 JIGS AND TOOLS REQUIRED FOR DISASSEMBLY, ASSEMBLY

AND ADJUSTMENT .................................................................... 2-2

2.2.1

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

2.3 DISASSEMBLY/ASSEMBLY OF MECHANISM ASSEMBLY ........ 2-3

2.3.1

General statement ................................................................ 2-3

2.3.2

Explanation of mechanism mode .......................................... 2-3

2.3.3

Mechanism timing chart ........................................................ 2-4

2.4 DISASSEMBLY/ASSEMBLY OF MECHANISM ASSEMBLY ........ 2-5

2.4.1

Follow chart .......................................................................... 2-5

2.4.2

Disassembly/assembly ......................................................... 2-8

2.4.3

List of procedures for disassembly ..................................... 2-14

2.5 CHECKUP AND ADJUSTMENT OF MECHANISM PHASE ...... 2-15

2.6 MECHANISM ADJUSTMENTS .................................................. 2-16

2.6.1

Assembling slide deck assembly and main deck assembly 2-16

2.6.2

Locating tension pole .......................................................... 2-17

2.7 SERVICE NOTE ......................................................................... 2-18

2.8 JIG CONNECTOR CABLE CONNECTION ................................ 2-20

3. ELECTRICAL ADJUSTMENT

3.1 PRECAUTION .............................................................................. 3-1

3.2 SETUP ......................................................................................... 3-2

4. CHARTS AND DIAGRAMS

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

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

4.1 BOARD INTERCONNECTIONS [GR-DVM55U] .......................... 4-3

4.2 BOARD INTERCONNECTIONS [GR-DVM75U] .......................... 4-5

TABLE OF CONTENTS

Section

Title

Page

Section

Title

Page

4.3 SYSCON SCHEMATIC DIAGRAM [GR-DVM55U] .......................... 4-7

4.4 SYSCON SCHEMATIC DIAGRAM [GR-DVM75U] .......................... 4-9

4.5 PC IF SCHEMATIC DIAGRAM [GR-DVM55U] ............................. 4-11

4.6 PC IF SCHEMATIC DIAGRAM [GR-DVM75U] ............................. 4-13

4.7 DVMAIN SCHEMATIC DIAGRAM [GR-DVM55U] ......................... 4-15

4.8 DVMAIN SCHEMATIC DIAGRAM [GR-DVM75U] ......................... 4-17

4.9 SERVO SCHEMATIC DIAGRAM ...................................................... 4-19

4.10

PRE/REC SCHEMATIC DIAGRAM ............................................... 4-21

4.11

V OUT SCHEMATIC DIAGRAM [GR-DVM55U] ........................ 4-23

4.12

V OUT SCHEMATIC DIAGRAM [GR-DVM75U] ........................ 4-25

4.13

CAM DSP SCHEMATIC DIAGRAM [GR-DVM55U] ................... 4-27

4.14

CAM DSP SCHEMATIC DIAGRAM [GR-DVM75U] ................... 4-29

4.15

ANA IN SCHEMATIC DIAGRAM [GR-DVM75U] ........................... 4-31

4.16

TG/V.DRV SCHEMATIC DIAGRAM .............................................. 4-33

4.17

REG SCHEMATIC DIAGRAM ....................................................... 4-35

4.18

STO SENS SCHEMATIC DIAGRAM [GR-DVM75U] .................... 4-37

4.19

VF MAIN SCHEMATIC DIAGRAM ................................................ 4-39

4.20

DSC SCHEMATIC DIAGRAM [GR-DVM75U] ............................... 4-41

4.21

USB DRV SCHEMATIC DIAGRAM [GR-DVM75U] ....................... 4-43

4.22

MP3 SCHEMATIC DIAGRAM [GR-DVM75U] ............................... 4-45

4.23

W/B SCHEMATIC DIAGRAM ........................................................ 4-47

4.24

CCD SCHEMATIC DIAGRAM ....................................................... 4-48

4.25

MDA SCHEMATIC DIAGRAM ....................................................... 4-49

4.26

IR TALLY SCHEMATIC DIAGRAM ............................................... 4-51

4.27

OP DRIVER SCHEMATIC DIAGRAM ........................................... 4-53

4.28

MONITOR SCHEMATIC DIAGRAM .............................................. 4-55

4.29

JUNCTION SCHEMATIC DIAGRAM ............................................. 4-57

4.30

STROBE SCHEMATIC DIAGRAM [GR-DVM75U] ........................ 4-59

4.31

AUDIO AD/DA SCHEMATIC DIAGRAM ....................................... 4-61

4.32

MAIN AUDIO SCHEMATIC DIAGRAM ......................................... 4-63

4.33

A/HP SEL. SCHEMATIC DIAGRAM .............................................. 4-65

4.34

JACK SCHEMATIC DIAGRAM ...................................................... 4-67

4.35

WB SENS, CAMERA OPE. UNIT, DECK OPE. ASSY AND

SUB OPE. UNIT SCHEMATIC DIAGRAMS .................................. 4-69

4.36

MAIN CIRCUIT BOARD [GR-DVM55U] ........................................ 4-71

4.37

MAIN CIRCUIT BOARD [GR-DVM75U] ........................................ 4-77

4.38

MDA CIRCUIT BOARD .................................................................. 4-83

4.39

CCD AND JUNCTION CIRCUIT BOARDS ................................... 4-85

4.40

MONITOR CIRCUIT BOARD ......................................................... 4-87

4.41

AUDIO CIRCUIT BOARD .............................................................. 4-89

4.42

STROBE, W/B AND JACK CIRCUIT BOARDS ............................ 4-91

4.43

VOLTAGE CHARTS ...................................................................... 4-93

4.44

POWER SYSTEM BLOCK DIAGRAM .......................................... 4-97

4.45

VIDEO SYSTEM BLOCK DIAGRAM ............................................. 4-99

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> ..................................................... 5-19

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

MONITOR BOARD ASSEMBLY <04> ............................................ 5-21

JUNCTION BOARD ASSEMBLY <06> .......................................... 5-22

STROBE BOARD ASSEMBLY (DVM75U) <07> ............................ 5-22

AUDIO BOARD ASSEMBLY <08> ................................................. 5-23

JACK BOARD ASSEMBLY <09> ................................................... 5-25

W/B BOARD ASSEMBLY <11> ...................................................... 5-25

GR-DVM55U

GR-DVM75U

VIDEO FLASH

NOT USED

USED

DSC FLASH MEMORY

NOT USED

USED

ANLOG INPUT

NOT USED

USED

AV INPUT/S INPUT

NOT USED

USED

HEAD PHONE OUTPUT

NOT USED

USED

DIGITAL STILL OUTPUT

NOT USED

USED

MEMORY CARD

NOT USED

USED (8MB)

JACK BOX

CU-V505

CU-V506

USB TERMINAL

NOT USED

USED

JLIP/EDIT TERMINAL

NOT USED

USED

EDIT CONTROL OUTPUT

NOT USED

USED

The following table lists the differing points between Models GR-DVM55U and GR-DVM75U in this series.

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.

Fig.1

1. Locations requiring special caution are denoted by labels and in-

scriptions on the cabinet, chassis and certain parts of the product.

When performing service, be sure to read and comply with these

and other cautionary notices appearing in the operation and serv-

ice 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.

Power cord

Fig.2

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 compli-

ance 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 trans-

former primary lead wires are performed using crimp type connec-

tors, if replacing the connectors is unavoidable, in order 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

cut close to connector

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.

15 mm

Fig.4

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

wires fully into the connector.

Connector

Metal sleeve

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.

1.2

2.0

5.5

Crimping tool

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

·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 compliance with safety

standards.

1. Insulation resistance test

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

nally 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 acces-

sible 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 accessible

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.

Fig. 10

Fig. 9

Fig. 8

Table 1 Specifications for each region

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

Externally

exposed

accessible part