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JVC GR-DVM55U Service Manual

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JVC SERVICE & ENGINEERING COMPANY OF AMERICA
DIVISION OF JVC AMERICAS CORP.
Head office
:
1700 Valley Road Wayne, New Jersey 07470-9976
East Coast
:
10 New Maple Avenue Pine Brook, New Jersey 07058-9641
:
705 Enterprise Street Aurora, Illinois 60504-8149
Midwest
:
5665 Corporate Avenue Cypress, California 90630-0024
West Coast
:
1500 Lakes Parkway Lawrenceville, Georgia 30043-5857
Atlanta
:
2969 Mapunapuna Place Honolulu, Hawaii 96819-2040
Hawaii
JVC CANADA INC.
Head office
:
21 Finchdene Square Scarborough, Ontario M1X 1A7
:
Montreal
16800 Rte Trans-Canadienne, Kirkland, Quebec H9H 5G7
:
Vancouver
13040 Worster Court Richmond, B.C. V6V 2B3
(973)315-5000
(973)396-1000
(630)851-7855
(714)229-8011
(770)339-2582
(808)833-5828
(416)293-1311
(514)871-1311
(604)270-1311
S40895-03
Printed in Japan
SERVICE MANUAL

DIGITAL VIDEO CAMERA

GR-DVM55U/DVM75U
SPECIFICATIONS
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)
This service manual is printed on 100% recycled paper.
COPYRIGHT © 2001 VICTOR COMPANY OF JAPAN, LTD.
For Connectors
AV
: 1 V (p-p), 75 Ω, analog
Video output
: 0.8 V (p-p) – 1.2 V (p-p), 75 Ω, analog
Video input (GR-DVM75 only)
Audio output
: 300 mV (rms), 1 kΩ, analog, stereo
Audio input (GR-DVM75 only)
: 300 mV (rms), 50 kΩ, analog, stereo
Headphone output (GR-DVM75 only) : Stereo
DV
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
: Y : 1 V (p-p), 75 Ω, analog
Output
C : 0.29 V (p-p), 75 Ω, analog
: Y : 0.8 V (p-p) – 1.2 V (p-p), 75 Ω, analog
Input (GR-DVM75 only)
C : 0.2 V (p-p) – 0.4 V (p-p), 75 Ω, 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.
No. 86615
March 2001

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Summary of Contents for JVC GR-DVM55U

  • Page 1: Digital Video Camera

    : 300 mV (rms), 50 kΩ, analog, stereo Power consumption Headphone output (GR-DVM75 only) : Stereo JVC SERVICE & ENGINEERING COMPANY OF AMERICA LCD monitor off, viewfinder on : Approx. 4.4 W (GR-DVM75), Approx. 4.0 W (GR-DVM55) LCD monitor on, viewfinder off : Approx.

  • Page 2: Table Of Contents

    JACK BOARD ASSEMBLY <09> ........... 5-25 4.1 BOARD INTERCONNECTIONS [GR-DVM55U] ......4-3 W/B BOARD ASSEMBLY <11> ............5-25 4.2 BOARD INTERCONNECTIONS [GR-DVM75U] ......4-5 The following table lists the differing points between Models GR-DVM55U and GR-DVM75U in this series. GR-DVM55U GR-DVM75U VIDEO FLASH...

  • Page 3: Important Safety Precautions

    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.
  • Page 4 • 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.

  • Page 6: Disassembly

    SECTION 1 DISASSEMBLY 1.1 BEFORE ASSEMBLY AND DISASSEMBLY 1.1.4 Disconnection of Connectors (Wires) 1.1.1 Precautions Connector Pull both ends of the connector in the arrow direction, re- 1. Be sure to remove the power supply unit prior to mount- move the lock and disconnect the flat wire. ing and soldering of parts.

  • Page 7: Jigs And Tools Required For Disassembly, Assembly And Adjustment

    1.2 JIGS AND TOOLS REQUIRED FOR DISASSEMBLY, 1.3 DISASSEMBLY/ASSEMBLY OF CABINET PARTS ASSEMBLY AND ADJUSTMENT AND BOARD ASSEMBLY 1.2.1 Tools required for adjustments 1.3.1 Disassembly flow chart This flowchart indicates the disassembly step for the cabi- Torque Driver YTU94088 YTU94088-003 net parts and board assembly in order to gain access to item(s) to be serviced.

  • Page 8: Disassembly Method

    1.3.2 Disassembly method NOTE Beware of electrical shock due to the capacitor during work. STEP Fig.No. PART POINT NOTE (GR-DVM75U ONLY) DECK OPE ASSY Fig.1-3-1 2(S1), (L1) — NOTE a: When disassembling the Front Cover Assembly, remove CN 1a the screws, pull out the studs and free the grip belt. MIC UNIT 2(S2), 2(L2) NOTE2...
  • Page 9 LOCK (MONITOR) NOTE NOTE NOTE NOTE Fig. 1-3-3 Fig. 1-3-1 NOTE : 0.118N·m (1.2kgf·cm) : 0.098N·m (1.0kgf·cm) NOTE GRIP BELT NOTE COVER STUD (DV) (HOOK) HOOK Fig. 1-3-2...
  • Page 10 NOTE : 0.198N·m (2.0kgf·cm) Fig. 1-3-4 TAPE NOTE NOTE Fig. 1-3-5...
  • Page 11 : 0.147N·m (1.5kgf·cm) NOTE NOTE NOTE NOTE Fig. 1-3-6 Fig. 1-3-7 NOTE NOTE SWITCH NOTE <TOP VIEW> NOTE NOTE NOTE NOTE CN803(AUDIO) : 0.098N·m (1.0kgf·cm) Fig. 1-3-8...
  • Page 12 BRACKET (TOP) NOTE SWITCH SPACER NOTE : 0.098N·m (1.0kgf·cm) Fig. 1-3-9 NOTE BRACKET (MECHA) NOTE NOTE NOTE SHIELD PLATE NOTE Fig. 1-3-10...

  • Page 13: Disassembly Of 5 Monitor Assembly

    1.4 DISASSEMBLY OF 5 MONITOR ASSEMBLY b: Remove the MONITOR board assembly and Note backlight together unless it is needed to separate 1.4.1 5 Monitor assembly/Hinge assembly them from each other for part replacement, etc., 1. Remove the four screws (1-4). While opening the moni- because the two are soldered to each other.

  • Page 14: Disassembly Of 7 Op Block Assembly/Ccd Board Assembly

    1.5 DISASSEMBLY OF 7 OP BLOCK ASSEMBLY/CCD 1.5.3 How to install OP block assembly and CCD board BOARD ASSEMBLY assembly 1.5.1 Precautions 1. Install the optical LPF with the space rubber fitted to its CCD side in the OP block assembly. 1.

  • Page 15: Disassembly Of 9 E Vf Assembly

    1.6 DISASSEMBLY OF 9 E VF ASSEMBLY 1.6.1 9E VF assembly Note a: When disassembling the E VF assembly, remove <Frame (VF)> the frame (VF) from the case/cap assembly de- 5. Remove the screw (5) first and then LCD module/holder pending on the situation.

  • Page 16: Emergency Display

    1.7 EMERGENCY DISPLAY Whenever some abnormal signal is input to the syscon CPU, Example (in case of the error number E01): an error number (E01, as an example) is displayed on the LCD monitor or (in the electronic view finder). In every error status, such the message as shown below alternately appear over and over.

  • Page 17: Service Note

    1.8 SERVICE NOTE 1-12...

  • Page 18: Mechanism Adjustment

    SECTION 2 MECHANISM ADJUSTMENT 2.1 PRELIMINARY REMARKS ON ADJUSTMENT AND (3) The symbol (T or B)appearing in this column shows the REPAIR side which the objective part is mounted on. T =the upper side, B =the lower side 2.1.1 Precautions (4) Symbols appearing in this column indicate drawing 1.

  • Page 19: Jigs And Tools Required For Disassembly, Assembly And Adjustment

    2.2 JIGS AND TOOLS REQUIRED FOR DISASSEMBLY, ASSEMBLY AND ADJUSTMENT 2.2.1 Tools required for adjustments 1. Torque Driver Torque Driver YTU94088 YTU94088-003 Be sure to use to fastening the mechanism and exterior parts because those parts must strictly be controlled for tightening torque.

  • Page 20: Disassembly/Assembly Of Mechanism Assembly

    2.3 DISASSEMBLY/ASSEMBLY OF MECHANISM <SUB CAM GEAR> ASSEMBLY 2.3.1 General statement The mechanism should generally be disassembled/assem- bled in the EJECT mode (ASSEMBLY mode). (Refer to Fig. 2-3-1.) TOP VIEW BOTTOM VIEW However, when the mechanism is removed from the main body, it is set in the STOP mode.

  • Page 21: Mechanism Timing Chart

    2.3.3 Mechanism timing chart MODE EJECT C IN SHORT FF STOP PLAY PARTS MAIN CAM (ø10.4) 31.7 45.6 49.5 74.04 129.5 156.6 169.2 211.5 280.3 SUB CAM (ø11) 43.1 46.8 122.5 148.1 ENCODER (ø10) 47.4 51.5 134.7 162.9 291.5 ROTARY ENCODER CAM SW SLIDE END...

  • Page 22: Disassembly/Assembly Of Mechanism Assembly

    2.4 DISASSEMBLY/ASSEMBLY OF MECHANISM ASSEMBLY 2.4.1 Follow chart 1. Configuration Mechanism assembly Cassette housing assembly Slide deck assembly Main deck assembly Fig. 2-4-1 2. Procedures for disassembly Mechanism assembly Cassette housing assembly Slide deck assembly Main deck assembly Fig. 2-4-2...
  • Page 23 3. Disassembling procedure table PART NAME FIG. POINT NOTE REMARKS A Cassette housing assembly Fig. 2-4-5 3(S1),(L1a)-(L1d) 1a, 1b, 1c, 1d Adjustment Reel disk (SUP) assembly Fig. 2-4-6 (W2) 2a, 2b Reel disk (TU) assembly Fig. 2-4-6 (W2) 2a, 2b Reel cover assembly Fig.
  • Page 24 < TOP VIEW > 4b 11b 11a Main deck assembly Slide deck assembly 7b 7a 7d 7e 9c 3c 3b 7h 2b Fig. 2-4-3 < BOTTOM VIEW > Main deck assembly Slide deck assembly Fig. 2-4-4...

  • Page 25: Disassembly/Assembly

    2.4.2 Disassembly/assembly Note 1a: <STOP mode> Shift the mechanism mode 1. A Cassette housing assembly from the STOP mode to the EJECT mode. Cassette Note 1b: housing Reassemble the cassette (L1b) assembly housing assembly to the (S1) mechanism as the cancel lever is moved in the direc- tion of the arrow.
  • Page 26 3. 3a Tension arm assembly/ 3b Release guide assembly 3c Idler arm assembly/ 3d Guide arm assembly 3e Pinch roller arm assembly Note 3a: When removing the reel cover assembly, pay heed to re- lease guide assembly and guide arm assembly. For, the (W3a) guide arm assembly is just inserted into the slide deck as- sembly from the upside and it is apt to come off after the...
  • Page 27 5. 5a Guide roller (SUPPLY) assembly/ 5b Rail assembly Note 5a: When reassembling, insert the tip Guide roller of the guide roller with the coil (s) assembly spring put on it into the hole on the main deck. Tighten the guide roller by about 6 turns so that the Note 5a (P5)
  • Page 28 Note 7a: 7. 7a Loading brake assembly/ 7b Guide pin (S) Don’t remove these parts unreasonably. If they are removed 7c Pad arm assembly/ 7d Slide guide plate assembly for some reason, be very careful not to lose them. 7e Collar/ 7f Collar/ 7g Sub brake assembly 7h Control plate assembly Note 7b: When reinstalling the sub brake assembly, set the control...
  • Page 29 9. 9a Loading guide/ 9b Timing belt 9c Center gear assembly/ 9d Motor bracket assembly 9e Worm wheel/ 9f Gear holder Note 9a: Carefully handle the DEW sensor. (Don’t touch the sensor Note 9b Note 9a surface in particular.) Note 9b: When engaging the timing belt, make sure that it securely (S9) engages with the gears of both the center gear assembly and...
  • Page 30 11. 11a Catcher (T) assembly/ 11b Capstan motor 11c Charge arm assembly/ 11d Sub cam gear 11e PWB holder Note 11: The following figure shows how to put the charge arm as- sembly and sub cam gear assembly together. (S11) (S11) Note 11 (W11)

  • Page 31: List Of Procedures For Disassembly

    2.4.3 List of procedures for disassembly Cassette housing assembly (P5) (L1b) (S9) (W5a) (S9) (W5b) (W5a) (W3b) (S1) (W5a) (W10b) (L1d) (L1a) (S4) (S4) (S4) (S1) (L1c) (S1) (S11) (W10a) (S10) (S11) (S10) (W10a) (S11) (S9) (S11) (W9) (W4) (P4b) (P4a) (S9) (W7)

  • Page 32: Checkup And Adjustment Of Mechanism Phase

    2.5 CHECKUP AND ADJUSTMENT OF MECHANISM PHASE <Connect gear> (Note 2) Set the connect gear so <Rotary encoder> that its locating hole meets Set the “I” of the rotary the hole on the main deck part at the tapped hole assembly.

  • Page 33: Mechanism Adjustments

    2.6 MECHANISM ADJUSTMENTS 2.6.1 Assembling slide deck assembly and main deck assembly œ Œ Fig. 2-6-1 Assembling procedure 1. Loosen the screw A. 2. Set the mechanism in the PLAY mode. (Refer to “2.3.2 Explanation of mechanism mode”.) 3. Press the end face B of the slide deck assembly (reel disk side) and the end face C of the main deck assem- bly (drum assembly side) with uniform force so that the two assemblies are tightly pressed to each other.

  • Page 34: Locating Tension Pole

    2.6.2 Locating tension pole <PLAY mode> Fig. 2-6-2 Locating procedure 1. Enter the mechanism assembly into the PLAY mode. (Refer to “2.3.2 Explanation of mechanism mode”.) 2. When the “ ” part is positioned down, make sure that the part “a” of the tension arm assembly is located within the range of “b”.

  • Page 35: Service Note

    2.7 SERVICE NOTE Use the following chart to manage mechanism parts that are removed for disassembling the mechanism. A Cassette housing assembly S1×3 Reel disk (SUP) assembly Reel cover assembly W2×1 Reel disk (TU) assembly W2×1 S2b×1 S2a×2 W2×1 Guide arm Tension arm Pinch roller arm Release guide...
  • Page 36 B Slide deck assembly Loading Slide guide Guide pin Pad arm brake plate (SUPPLY) assembly assembly assembly W7×1 P7a×1 W7×1 S7a×1 W7×1 P7b×1 S7b×1 Control Collar Collar Sub brake plate assembly assembly W7×1 P7c×1 W7×2 P7d×1 W6×1 C Main deck assembly Slide lever Tension lever Brake control...

  • Page 37: Jig Connector Cable Connection

    2.8 JIG CONNECTOR CABLE CONNECTION Remove one screw (1) first and the cover (JIG) next. GUIDE ROLLER (SUP) ASSY CN105 SHEET GUIDE ROLLER (TU) ASSY COVER (JIG) EXTENSION CONNECTOR NOTE) For supplying the power through the coupler by removing the cover (for jig), use this extension connector double for connecting the jig connector cable.

  • Page 38: Electrical Adjustment

    SECTION 3 ELECTRICAL ADJUSTMENT 3.1 PRECAUTION 3. Tools required for adjustments 1. Precaution Torque Driver Both the camera and deck sections of this model needs a YTU94088 YTU94088-003 personal computer for adjustment except simple adjustment with potentiometers. If some of the following parts is replaced for repair or other reason, the repaired set must be adjusted with a personal computer.

  • Page 39: Setup

    Torque driver PC cable Be sure to use to fastening the mechanism and exte- To be used to connect the VideoMovie and a personal rior parts because those parts must strictly be control- computer with each other when a personal computer led for tightening torque.

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Gr-dvm75u

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