JVC GR-AX640U Service Manual
JVC GR-AX640U Service Manual

JVC GR-AX640U Service Manual

Compact vhs camcorder
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COMPACT VHS CAMCORDER
GR-AX640U/AX840U
Regarding service information other than these sections, refer to the GR-AX940U service manual (No. 86446).
Also, be sure to note important safety precautions provided in the service manual.

SPECIFICATIONS

( The specifications shown pertain specifically to the model GR-AX840U)
Camcorder
General
Format
: VHS NTSC standard
Power source
: DC 6.0 V
Power consumption
: 5.4 W
Signal system
: NTSC-type
Video recording system
Luminance
: FM recording
Color
: Converted sub-carrier
direct recording
Conforms to VHS standard
Cassette
:
cassette
Tape speed
SP
: 33.35 mm/sec. (1-5/16 ips)
EP
: 11.12 mm/sec. (7/16 ips)
Recording time (max.)
SP
: 40 minutes
EP
: 120 minutes (with TC-40)
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)
Weight
: Approx. 710 g (1.6 lbs)
Dimensions
: 91 (W) x 119 (H) x 198 (D) mm
(3-8/5" x 4-11/16" x 7-13/16")
(with the viewfinder fully tilted
downward)
Pickup
: 1/4" format CCD
Lens:
F1.6, f = 3.9 to 62.4 mm, 16:1
power zoom lens with auto iris
and macro control, filter
diameter 40.5 mm
Viewfinder
: Electronic viewfinder
with 0.55" color LCD
White balance
adjustment
: Auto/Manual adjustment
Connectors
JLIP
Video
Audio
AC Power Adapter/Charger AA-V15U
Power requirement
U.S.A. and Canada
Other countries
Hz
Power consumption
Output
Charge
VTR
Charging system
detection, timer controlled
Dimensions
(5-9/16" x 1-11/16" x 2-11/16")
Weight
Cassette Adapter C-P7U
Dimensions
Weight
Accessory
©
COPYRIGHT
1999 VICTOR COMPANY OF JAPAN, LTD.
Provided Accessories
: ø3.5 mm, 4-pole, mini-head
jack
Optional Accessories
(compatible with RC-5325 plug)
: 1 Vp-p, 75 Ω unbalanced,
• Battery Packs BN-V12U, BN-V20U, BN-V856U
analog output
• Car Battery Charger BH-V3U
(via Video output connector)
• Battery Charger BH-VC10U
: –8 dBs, 1 kΩ analog output
• Car Battery Cord AP-V7U
(via Audio output connector)
• Compact VHS-C Cassettes TC-40/30/20
• Active Carrying Bag CB-V7U
• Audio/Video Cable
• JLIP-to-PC Cable VC-VJ49WU
• JLIP Video Producer
: AC 120 V`, 60 Hz
: AC 110 V to 240 V`, 50/60
• Brush Kit
: 23 W
Some accessories are not available in some areas. Please
consult your nearest JVC dealer for details on accessories
: DC 8.5 V
, 1.3 A
and their availability.
: DC 6.3 V
, 1.8 A
: Constant current, peak
Specifications shown are for SP mode unless otherwise
indicated. E & O.E. Design and specifications subject to
: 140 (W) x 42 (H) x 68 (D) mm
change without notice.
: Approx. 300 g (0.71 lbs)
: 188 (W) x 25 (H) x 104 (D) mm
(7-7/16" x 1" x 4-1/8")
: Approx. 240 g (0.53 lbs)
: "AA (R6)"-size battery x 1
pg. 6
No. 86447
January 1999

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Summary of Contents for JVC GR-AX640U

  • Page 1: Specifications

    Power consumption : 23 W Some accessories are not available in some areas. Please : 40 minutes Output consult your nearest JVC dealer for details on accessories : 120 minutes (with TC-40) Charge : DC 8.5 V , 1.3 A and their availability.
  • Page 2: Table Of Contents

    TABLE OF CONTENTS ELECTRICAL ADJUSTMENT ELECTRICAL ADJUSTMENT ............................. 3-1 ELECTRONIC VIEWFINDER (E. VF) ADJUSTMENT (For GR-AX640U/UC) ............3-3 CHARTS AND DIAGRAMS BOARD INTERCONNECTIONS ..........................4-3 CPU SCHEMATIC DIAGRAM ............................. 4-5 Y/C & AUDIO SCHEMATIC DIAGRAM ........................4-11 4.10 REGULATOR SCHEMATIC DIAGRAM ........................4-19 4.11...
  • Page 3 The following table indicate different parts number between models GR-AX940U, AX940UC, AX840U, AX840UC, AX640U and GR-AX640UC. PACKING ASSEMBLY <M1> MODEL REF No. GR-AX940U GR-AX940UC GR-AX840U GR-AX840UC GR-AX640U GR-AX640UC ITEM PACKING CASE LY30905-018A LY30905-039A LY30905-011A LY30905-021A LY30905-017A LY30905-020A INST. BOOK (EN)
  • Page 4 MODEL REF No. GR-AX940U GR-AX940UC GR-AX840U GR-AX840UC GR-AX640U GR-AX640UC ITEM Q2062 TRANSISTOR 2SC4617/QR/-X – – – – Q3106 PAIR TRANSISTOR HN1B01FU/G/-X – – Q6201 TRANSISTOR 2SD1628/FG/-X – – – – Q6202 TRANSISTOR 2SA1774/QR/-X – – – – Q6203 TRANSISTOR 2SC4617/QR/-X –...
  • Page 5 MODEL REF No. GR-AX940U GR-AX940UC GR-AX840U GR-AX840UC GR-AX640U GR-AX640UC ITEM C4037 CAPACITOR NCF31EZ-104X – – – – C4038 CAPACITOR NCF31EZ-104X – – – – C6051 CAPACITOR NCB11CK-105X – – C6052 T CAPACITOR NBP41DM-475X – – C6053 CAPACITOR NCB11CK-105X – –...
  • Page 6: Electrical Adjustment

    (For GR-AX640U/UC) ment are required (Refer to sec. 3.1.1-4). Please contact to JVC Service for detaile information. Referring to “SEC. 1 DISASSEMBLY” and connect the E.VF • OP block WIRE to CN12 of the MAIN board.
  • Page 7: Electronic Viewfinder (E. Vf) Adjustment (For Gr-Ax640U/Uc)

    ELECTRONIC VIEWFINDER (E. VF) ADJUSTMENT 1) Put the deflection yoke to the most inner side of CRT neck (For GR-AX640U/UC) first. Then fix the stopper temporary. 2) Adjust the tilt of picture on the E. VF screen by tilting the Notes: deflection yoke.
  • Page 8: Charts And Diagrams

    SECTION 4 CHARTS AND DIAGRAMS 4.1 BOARD INTERCONNECTIONS...
  • Page 10: Cpu Schematic Diagram

    4.2 CPU SCHEMATIC DIAGRAM...
  • Page 12: Y/C & Audio Schematic Diagram

    4.6 Y/C & AUDIO SCHEMATIC DIAGRAM 4-11...
  • Page 13 4-12...
  • Page 14: Regulator Schematic Diagram

    4.10 REGULATOR SCHEMATIC DIAGRAM 4-19...
  • Page 15 4-20...
  • Page 16: Lcd Ctl Schematic Diagram

    4.11 LCD CTL SCHEMATIC DIAGRAM 4-22...
  • Page 18: Main Circuit Board

    4.12 MAIN CIRCUIT BOARD FOIL SIDE (B) 4-23...
  • Page 19 ATTENTION: CAUTION: POUR UNE PROTECTION PERMANENTE FOR CONTINUED PROTECTION AGAINST CONTRE LES RISQUE D’INCENDE, FIRE HAZARD, REPLACE ONLY WITH SAME REMPLACER LE FUSIBLE PAR UN AUTRE TYPE AND RATED FUSE. DE MEME TYPE ET DE MEME TENSION. 4-24...
  • Page 20 COMPONENT PARTS LOCATION GUIDE (MAIN PWB) REF.No. LOCATION REF.No. LOCATION REF.No. LOCATION REF.No. LOCATION REF.No. LOCATION REF.No. LOCATION REF.No. LOCATION CAPACITOR C3043 C2001 C4006 C6006 D3202 L5204 C3044 C101 C2002 C4007 C6007 D3251 L6001 C3045 C102 C2003 C4008 C6008 D3252 L6002 C3046 C103...
  • Page 21 REF.No. LOCATION REF.No. LOCATION REF.No. LOCATION REF.No. LOCATION REF.No. LOCATION REF.No. LOCATION REF.No. LOCATION Q4006 R179 R2026 R3119 RA108 R3530 R4516 R180 R2027 R3120 VR3301 A Q4007 R3531 R5201 R181 R2028 R3121 VR3302 A Q4201 R3532 R5202 R182 R2029 R3122 Q4202 R3533 R5203...
  • Page 22 COMPONENT SIDE (A) 4-27...
  • Page 23 4-28...
  • Page 24: Power System Block Diagram

    4.17 POWER SYSTEM BLOCK DIAGRAM 4-37...
  • Page 25 4-38...
  • Page 26: Electronic Viewfinder Schematic Diagram (For Ax640U/Uc)

    4.23 ELECTRONIC VIEWFINDER SCHEMATIC DIAGRAM (For AX640U/UC) 4-55...
  • Page 27 4-56...
  • Page 28: Electronic Viewfinder Circuit Board (For Ax640U/Uc)

    4.24 ELECTRONIC VIEWFINDER CIRCUIT BOARD (For AX640U/UC) FOIL SIDE (B) C7010 C7008 D7001 R7012 C7014 R7026 R7022 R7018 C7011 R7015 R7017 R7011 Q7002 VR7001 R7002 4-57...
  • Page 29 L7002 VR7003 CN7002 5.5M B5B-ZR C7006 100u 0.015 C7007 (3216) C7004 T7001 220 10V QQH0011-001 – L7001 PELN1175 R7003 – C7002 R7031 C7009 C7015 220 10V – C7003 220 10V C7012 150P 1000V – CN7001 – 100 10V IL-Y-4P-S15...
  • Page 30: Parts List

    SECTION 5 PARTS LIST SAFETY PRECAUTION Parts identified by the symbol are critical for safety. Replace only with specified part numbers. ELECTRONIC VIEWFINDER ASSEMBLY <M4> [GR-AX640U/UC] ELECTRONIC VIEWFINDER <60> SERIAL NO. LABEL REF No. PART No. PART NAME, DESCRIPTION REF No.
  • Page 31: Electrical Parts List

    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - E. VF BOARD ASSEMBLY (GR-AX640U/UC) <60>...
  • Page 32 JVC SERVICE & ENGINEERING COMPANY OF AMERICA DIVISION OF JVC AMERICAS CORP. Head office 1700 Valley Road Wayne, New Jersey 07470-9976 (973)315-5000 East Coast 107 Little Falls Road Fairfield, New Jersey 07004-2105 (973)808-9279 705 Enterprise Street Aurora, Illinois 60504-8149 (630)851-7855...

This manual is also suitable for:

Gr-ax840u

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