JVC GR-DVF11U Service Manual
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JVC GR-DVF11U Service Manual

JVC GR-DVF11U Service Manual

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GR-DVF11U/DVF21U/DVF31U
SPECIFICATIONS
(The specifications shown partain specifically to the model GR-DVF31U)
Camcorder
General
Power supply
: DC 6.3 V
DC 7.2 V
Power consumption
LCD monitor off, viewfinder on : Approx. 4.6 W
LCD monitor on, viewfinder off : Approx. 5.7 W
Video light
: Approx. 3.9 W
Format
: DV Format (SD mode)
Signal format
: NTSC Standard
Video signal recording format
: Digital Component Recording
Cassette
: Mini DV Cassette
Tape Speed
: SP: 18.8 mm/s
LP: 12.5 mm/s
Maximum recording time
: SP: 60 min.
LP: 90 min. (using M-DV60ME cassette)
Pickup
: 1/4" CCD
Lens
: F 1.6, f = 3.9 to 62.4 mm, 16:1 Power Zoom Lens
Filter diameter
: ø40.5 mm
LCD monitor
: 3.0" diagonally measured, LCD panel/TFT active matrix system
Viewfinder
: Electronic viewfinder with 0.55" color LCD
Speaker
: Monaural
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)
Dimensions
: 188 (W) x 118 (H) x 88 (D) mm (7-7/16" x 4-11/16" x 3-1/2")
(with the LCD monitor closed and the viewfinder pushed down)
Weight
: Approx. 700 g (1.6 lbs)
DIGITAL VIDEO CAMERA
(Using AC Power Adapter/Charger)
(Using battery pack)
©
COPYRIGHT
1999 VICTOR COMPANY OF JAPAN, LTD.
Connectors
: Y: 1 Vp-p, 75 Ω, analog output
S-Video
C: 0.29 Vp-p, 75 Ω, analog output
JLIP
: ø3.5 mm, 4-pole, mini-head jack (compatible with RC-5325 plug)
PC
: ø2.5 mm, 3-pole
: 1 Vp-p, 75 Ω unbalanced, analog output
Video output
Audio output
: –8 dBs, 1 kΩ analog output, stereo
DV input/output
: 4-pin, IEEE1394 compliant
AC Power Adapter/Charger AA-V20U
Power requirement
U.S.A. and Canada
: AC 120 V`, 60 Hz
Other countries
: AC 110 V to 240 V`, 50/60 Hz
Power consumption
: 23 W
Output
Charge
: DC 7.2 V
VTR
: DC 6.3 V
Dimensions
: 68 (W) x 38 (H) x 110 (D) mm (2-11/16" x 1-1/2" x 4-3/8")
Weight
: Approx. 255 g (0.57 lbs)
Specifications shown are for SP mode unless otherwise indicated. E & O.E. Design and specifications subject to
change without notice.
, 0.77 A
, 1.8 A
No. 86503
May 1999

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Summary of Contents for JVC GR-DVF11U

  • Page 1 DIGITAL VIDEO CAMERA GR-DVF11U/DVF21U/DVF31U SPECIFICATIONS (The specifications shown partain specifically to the model GR-DVF31U) Camcorder General Connectors : Y: 1 Vp-p, 75 Ω, analog output Power supply : DC 6.3 V (Using AC Power Adapter/Charger) S-Video C: 0.29 Vp-p, 75 Ω, analog output DC 7.2 V...

  • Page 2: Table Of Contents

    CIRCUIT BOARD ..............6-4 PREPARATION ................. 3-1 ELECTRICAL PARTS LIST ............6-5 E. VF SECTION ADJUSTMENT (B/W VF ONLY) ..... 3-1 The following table lists the differing points between Models GR-DVF11U, GR-DVF21U and GR-DVF31U in this series. GR-DVF11U GR-DVF21U GR-DVF31U...

  • 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 compli- ance with safety standards.

  • Page 5: Disassembly

    SECTION 1 DISASSEMBLY 1.1 BEFORE ASSEMBLY AND DISASSEMBLY 1.1.3 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 6: Main Screws To Deal With Disassembly/Assembly

    1.1.4 Main screws to deal with disassembly/assembly 1.2 TOOLS AND EQUIPMENTS REQUIRED FOR ADJUSTMENTS Table 1-1-1 lists screws by their symbols correspond to 1.2.1 Tools required for adjustments those shown in figures of this section “Disassembly”. ALIGHMENT TAPE GUIDE DRIVER Note: Screw that are asterisked (marked with ) in the MC-1...

  • Page 7: Equipments Required For Adjustments

    SERVICE SUPPORT SYSTEM PC CABLE 11. Light box YTU94057-41 QAM0099-002 To be used for adjustment of the camera system. 12. Camera stand To be used together with the INF adjustment lens holder. 13. Patch cord To be used to connect electrical parts, P.C. boards, etc. for servicing.

  • Page 8: Disassembly/Assembly Of Cabinet Parts

    1.3 DISASSEMBLY/ASSEMBLY OF CABINET PARTS 1.3.2 Disassembly method 1.3.1 Disassembly flow chart REMOVAL STEP Fig. This flowchart indicates the disassembly step for the cabi- UNLOCK/RELEASE/ /LOC PART UNPLUG/UNCLAMP/ Note net parts and board assembly in order to gain access to UNSOLDER item(s) to be serviced.
  • Page 9 Top cover Upper case (1) NOTE2 (L2) HINGE ASSY NOTE4 NOTE4 NOTE1 (S1) (L4) (S2) NOTE3 (S2) E.VF ASSY NOTE1 (S1) MONITOR ASSY (L3) Note 1: When dismantling, spread the upper case (1) slightly outwards not to get it touching the hinge (L1) assembly.
  • Page 10 MAIN board assembly MIC / DC light assembly : 0.07N·m (0.7kgf·cm) NOTE9 NOTE9 LUG WIRE MONITOR ASSY (S1) (S1) LUG WIRE (L11) (L10) (S1) (S4) LUG WIRE NOTE 11 NOTE11 NOTE10 CAP (REAR JACK) (S1) (S1) Note 9: Remove the lug wire fastened together with the bracket (monitor).
  • Page 11 Monitor assembly Frame assembly NOTE15 (L1) (S1) NOTE14 (S1) (L3) (S1) ASSY (S1) (S1) FRAME (S1) ASSY (S1) Note 14: Bay head to the FPC wire not to damage it. Note 15: For disassembling the Monitor assembly, refer to "1.5 DISASSEMBLY/ASSEMBLY OF MONITOR ASSEMBLY"...
  • Page 12 SECOND board assembly Mechanism assembly (S10) HOLDER (L14) (S8) (S10) (L15) SHIELD COVER (L17) (L16) : 0.07N·m (0.7kgf·cm) : 0.07N·m (0.7kgf·cm) Fig. 1-3-14 Fig. 1-3-15...

  • Page 13: Disassembly/Assembly Of Op Block

    DISASSEMBLY/ASSEMBLY OF OP BLOCK 1.4.3 Assembly 1. As the optical LPF is fitted with the spacer rubber, set it 1.4.1 Precautions in the holder located in the center of the lens of the OP block assembly. 1. Throughout disassembly/assembly of the OP block as- Note 4: When mounting the optical LPF, pay heed to its ori- sembly, pay careful attention to the CCD image sensor, entation because it has different surfaces in the front...

  • Page 14: Disassembly/Assembly Of Monitor Assembly

    1.5 DISASSEMBLY/ASSEMBLY OF MONITOR ASSEMBLY <Disassembly of hinge assembly block> Remove one screw (5) and then remove the SWITCH Note 1: For a convenience of explanation, the monitor assem- (open/closed) board assembly. bly is roughly divided into two blocks as mentioned 10.
  • Page 15 (L4) (L3) (L1) MONITOR COVER ASSY (L6) (L2) NOTE5,6 (S15) (S14) (L5) (S14) (S15) MONITOR BOARD ASSY NOTE6 BRACKET NOTE7 (L17) WIRE (L15) (L13) (L16) (L10) (L9) HOLDER(PWB) NOTE7 BACK LIGHT (L14) HINGE COVER(U) NOTE10 FPC ASSY (L12) (S19) (S18) (L19) (S19) (L18)

  • Page 16: Disassembly/Assembly Of Electronic Viewfinder (Vf)

    1.6 DISASSEMBLY/ASSEMBLY OF ELECTRONIC VIEWFINDER (VF) Note 2: When assembling, move the FPC inwards with a wire paying careful attention to it not to break it. 1.6.1 Disassembly/Assembly of B/W VF 3. Pull the wire out of the connector V. Note 1: When remove the B/W VF, leave the hinge assem- 4.

  • Page 17: Disassembly/Assembly Of Color Vf

    1.6.2 Disassembly/assembly of COLOR VF 3. While holding the holder (LCD) by hand, remove the VF Note 1: When remove the color VF, leave the hinge as- BL board assembly. sembly (VF), bracket (VF) and VF case (L) as Note 3: When assembling, set the bosses (L3, L4) of the they are fitted to the VF.
  • Page 18 Fig. 1-7-1...

  • Page 19: How To Take Out Cassette Tape Manually

    1.8 HOW TO TAKE OUT CASSETTE TAPE MANUALLY operation takes place, the part of the tape remaining out- side is caught in the cassette lid and the tape may be On the occasion that the cassette tape cannot be ejected damaged partially.
  • Page 20 1.9 EXTENTION CABLE CONNECTION Connected point Pin No. Note/Patch cord MAIN PWB CN101 SECOND PWB CN301 YTU94126A-100 MAIN PWB CN106 CCD PWB YTU94077-18/YTU94074-18 MAIN PWB CN107 OP BLOCK YTU94077-22/YTU94074-22 MAIN PWB CN104 VF (B/W) CN7001 YTU94077-10/YTU94074-10 MAIN PWB CN104 VF (COLOR) CN7301 YTU94077-20/YTU94074-20 MAIN PWB CN110 OPE.
  • Page 21 Screw Management Table Fig. 1-10-1...

  • Page 22: Precautions On Handling The Lithium Secondary Battery (J506/Main Board Assy)

    1.11 PRECAUTIONS ON HANDLING THE LITHIUM SECONDARY BATTERY (J506/MAIN BOARD ASSY) This unit is equipped with a button-type lithium secondary battery. Improper handling of this battery may cause heat to be generated, damaged, fires or leakage. Always follow the precautions below. Be sure not to shortcircuit, disassemble, deform and heat it.

  • Page 23: Demonstration Mode

    1.13 DEMONSTRATION MODE This model has the DEMONSTRATION mode. 1) How to set the DEMONSTRATION mode. The camera can be entered into the DEMONSTRA- MENU/BRIGHT TION mode by setting on the DISPLAY screen appear- Dial Power Switch ing on the LCD monitor (or in the viewfinder). When entering the camera into the DEMONSTRATION mode, pay heed to the following matters.
  • Page 24 <Flow chart> 1. CLASSIC FILM 2. STROBE 1/60 1/100 1/250 SEPIA 7. B/W MONOTONE 8. TWILIGHT (with WHITE BALANCE) 9. SLOW 4X (SLOW SHUTTER) 10. VIDEO ECHO 11. AUTO RELEASE Fig. 1-13-2 2) How to cancel the DEMONSTRATION mode. To cancel the DEMONSTRATION mode, turn the POWER switch off (“POWER OFF”).

  • Page 25: Mechanism Adjustment

    SECTION 2 MECHANISM ADJUSTMENT (2) This column shows part names corresponding to circled 2.1 PRELIMINARY REMARKS ON ADJUSTMENT AND RE- numbers in the left column. PAIR (3) The symbol (T or B) appearing in this column shows the 2.1.1 Precautions side which the objective part is mounted on.

  • Page 26: Disassembling/Reassembling Mechanism Assembly

    2.2 DISASSEMBLING/REASSEMBLING MECHANISM ASSEMBLY 2.2.1 General statement The mechanism should generally be disassembled/reassembled in the EJECT mode (ASSEMBLY mode). (Refer to Fig. 2-2-1.) However, when the mechanism is removed from the main body, it is set in the STOP mode. Therefore, it is required to shift the mechanism mode from the STOP mode to the EJECT mode after the mechanism is removed from the main body.

  • Page 27: Mechanism Timing Chart

    2.2.3 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 SLIDE END SLIDE START <SLIDE DECK>...

  • Page 28: Disassembling/Reassembling Mechanism Assembly

    2.2.4 Disassembling/reassembling mechanism assembly 1. Configuration Mechanism assembly Cassette housing assembly Slide deck assembly Main deck assembly Fig. 2-2-8 2. Procedures for disassembly Mechanism assembly Cassette housing assembly Slide deck assembly Main deck assembly ¤ Fig. 2-2-9...
  • Page 29 3. Disassembling procedure table Fig. Step Note Remoarks Part Name Point Cassette housing assembly 3(S1),(L1)-(L4) 1,28,29,30 Adjustment Reel disk (SUP) assembly (W1) Reel disk (TU) assembly (W1) Reel cover assembly (S2),2(S1),(W1) Tension arm assembly (W1) Release guide assembly Idler arm assembly (W2) Guide arm assembly Pinch roller arm assembly...
  • Page 30 10 37 36 Main deck assembly Slide deck assembly 15 14 17 18 27 6 5 21 2 Fig. 2-2-10 Top view Main deck assembly Slide deck assembly Fig. 2-2-11 Bottom view...

  • Page 31: Disassembling/Reassembling

    2.2.5 Disassembling/reassembling <STOP mode> Note 1: Shift the mechanism mode Cassette housing assembly from the STOP mode to the EJECT mode. Cassette housing (L2) assembly Note 28: (S1) Reassemble the cassette housing assembly to the mechanism as the cancel le- ver is moved in the direction of the arrow.
  • Page 32 Tension arm assembly/ Release guide assembly Idler arm assembly/ Guide arm assembly Pinch roller arm assembly Note 4: When removing the reel cover assembly, pay heed to release (W1) guide assembly and guide arm assembly. For, the guide arm assembly is just inserted into the slide deck assembly from the upside and it is apt to come off after the reel cover as- sembly is removed.
  • Page 33 Guide roller (SUPPLY) assembly/ Rail assembly Note 7: When removing the rail assembly, remove the guide roller Note 7 (SUPPLY) assembly beforehand. (P3) Note 8 Note 8: (W1) Pay careful attention to the spring not to lose it. Note 9 (W1) (W1) Note 9:...
  • Page 34 Loading brake assembly/ Guide pin (S) Note 11: & Don’t remove these parts unreasonably. If they are removed Pad arm assembly/ Slide guide plate assembly for some reason, be very careful not to lose them. Collar/ Collar/ Sub brake assembly Control plate assembly Note 20: When reinstalling the sub brake assembly, set the control plate...
  • Page 35 Loading guide/ Timing belt Center gear assembly/ Motor bracket assembly Worm wheel/ Gear holder Note 12: Note 16 Note 12 Carefully handle the DEW sensor. (Don’t touch the sensor sur- face in particular.) Note 16: When engaging the timing belt, make sure that it securely en- (S2) gages with the gears of both the center gear assembly and (S2)
  • Page 36 Catcher (T) assembly/ Capstan motor Charge arm assembly/ Sub cam gear PWB holder Note 14: The following figure shows how to put the charge arm assem- (S2) bly and sub cam gear assembly together. (S2) Note 14 (W1) (S2) (S2) (S2) (S2) (S2)

  • Page 37: List Of Procedures For Disassembly

    2.2.6 List of procedures for disassembly (W1) Cassette housing assembly (W1) (W1) (L2) (S2) (S2) (W2) (S1) (W2) (L4) (L1) (S2) (P3) (S2) (S2) (S1) (L3) (S1) (S2) (W1) (S2) (S2) (S2) (W1) (S2) (S2) (S2) (W1) (W1) (P2) (P1) (S2) (W1) (P5)

  • Page 38: Checkup And Adjustment Of Mechanism Phase

    2.2.7 Checkup and adjustment of mechanism phase <Connect gear> (Note 2) Set the connect gear so <Rotary encoder> that its locating hole meets Set the “ ” of the rotary the hole on the main deck part at the tapped hole assembly.

  • Page 39: Reassembling Slide Deck Assembly And Main Deck Assembly

    2.2.8 Reassembling slide deck assembly and main deck assembly œ Œ Fig. 2-2-14 Reassembling procedure 1. Loosen the screw A. 2. Set the mechanism in the PLAY mode. (Refer to page 2-2.) 3. Press the end face B of the slide deck assembly (reel disk side) and the end face C of the main deck assembly (drum assembly side) with uniform force so that the two assemblies are tightly pressed to each other.

  • Page 40: Locating Tension Pole

    2.2.9 Locating tension pole <PLAY mode> Fig. 2-2-15 Locating procedure 1. Enter the mechanism assembly into the PLAY mode. (Re- fer to page 2-2.) 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 41: Procedure Of Compatibility And P.b. Eq

    2.3 PROCEDURE OF COMPATIBILITY AND P.B. EQ. 2.3.2 Adjustment standard (ERROR RATE) ADJUSTMENTS Note : For details of the test instruments, tools and jigs re- 2.3.1 Precautions quired for adjustment, refer to pages 1-2, 1-3 and 2-1 Prior to starting disassembling and adjusting work, be sure to of this manual.

  • Page 42: Linearity Adjustment

    2.3.3 Linearity adjustment head. When the ATF of the DVC is off, its tracking op- eration is effectuated only for the speed control sys- Procedure of linearity adjustment is shown by the following tem. Therefore, as time elapses, the DVC gradually flowchart.

  • Page 43: Eq. (Error Rate) Adjustment (For Sp And Lp)

    If the minimum error rate does not approximate to the stand- Note 7: IIt is advised to use a new cassette tape or an unre- ard value (see Note 7) in spite of repeated adjustments, clean corded part of a used cassette tape for recording. If a the head and tape transport system.
  • Page 44 A Cassette housing assembly S1×3 1 Reel disk (SUP) assembly 3 Reel cover assembly W1×1 2 Reel disk (TU) assembly W1×1 S2×1 S1×2 W1×1 4 Tension arm assembly 5 Release guide assembly 6 Idler arm assembly 7 Guide arm assembly 8 Pinch roller arm assembly W1×1 W2×1...
  • Page 45 $ Loading brake assembly % Guide pin (SUPPLY) ^ Pad arm assembly & Slide guide plate B Slide deck assembly assembly × × 1 @ @P4 S2×1 W1×1 P5×1 S3×1 * Collar ( Collar ) Sub brake assembly q Control plate assembly ×...

  • Page 46: Jig Connector Cable (Ytu93082C) Connection

    2.5 JIG CONNECTOR CABLE (YTU93082C) CONNECTION Remove one screw (1) first and the ciover (JIG) next. CN105 (S5) Cover(JIG) Jig connector cable (YTU93082C) Fig. 2-5-1 MAIN BOARD CN105 JIG CONNECTOR CABLE PWR_CTL REC_MON REC_MON FS_PLL FS_PLL ATFI ATFI AL_3V AL_3V MAIN_VCO MAIN_VCO ENV_OUT...

  • Page 47: Electrical Adjustment

    And if parts such as the following need replacement, special computerized adjustment are required (Refer to sec. 3.1.1- 3. Required adjustment tools 3). Please contact to JVC Service for detaile information. For detsails of special jigs necessary for adjustment, refer to • OP block page 1-2 and 1-3 of the Section 1.
  • Page 48 2. Setup with patch cords and jig connector cables NOTE: Fig. 3-3-2 shows an example of expansion setup that facilitates inspection of major boards because main components are connected by means of patch cords and jig cables. For proceeding to electrical adjustment in such the setup, disassemble the set at a certain level required for the current adjustment objectives referring to the section 1 “DISASSEMBLY”...

  • Page 49: Electronic Viewfinder (E. Vf) Adjustment

    ELECTRONIC VIEWFINDER (E. VF) ADJUSTMENT "A" = 2.5±0.05VDC Notes: Unless otherwise specified, all measurement points and adjustment parts are located on E. VF board. CN7003 "A" GND(0V) IC7001 1 0 B/W H.rate YB20861-01-01 ZP7008 Fig. 3-4-3 Black level CN7001 CN7002 3.4.2 Gain Subject •...

  • Page 50: Fuse Location For Main

    3.5 FUSE LOCATION FOR MAIN COMPONENT SIDE CN104 CN109 CN106 CN107 IC7802 IC7803 IC7801 F7801 IC5501 CN105 IC7804 IC4851 IC3301 IC3201 IC3401 0 1 MAIN YB10260-01-01 IC3202 91 29 IC3701 IC1012 IC3703 IC1006 IC1010 F6003 F6001 F6004 F6002 IC1001 IC1002 IC1003 IC1007 IC1004...

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