JVC GR-AX640U Bedienungsanleitung

January 1999

GR-AX640U/AX840U

SPECIFICATIONS

( The specifications shown pertain specifically to the model GR-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.

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

Provided Accessories

pg. 6

Optional Accessories

• Battery Packs BN-V12U, BN-V20U, BN-V856U

• Car Battery Charger BH-V3U

• Battery Charger BH-VC10U

• Car Battery Cord AP-V7U

• 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

• Brush Kit

Some accessories are not available in some areas. Please

consult your nearest JVC dealer for details on accessories

and their availability.

Specifications shown are for SP mode unless otherwise

indicated. E & O.E. Design and specifications subject to

change without notice.

Connectors

JLIP : ø3.5 mm, 4-pole, mini-head

jack

(compatible with RC-5325 plug)

Video : 1 Vp-p, 75 Ωunbalanced,

analog output

(via Video output connector)

Audio : –8 dBs, 1 kΩanalog output

(via Audio output connector)

AC Power Adapter/Charger AA-V15U

Power requirement

U.S.A. and Canada : AC 120 V`, 60 Hz

Other countries : AC 110 V to 240 V`, 50/60

Power consumption : 23 W

Output

Charge : DC 8.5 V , 1.3 A

VTR : DC 6.3 V , 1.8 A

Charging system : Constant current, peak

detection, timer controlled

Dimensions : 140 (W) x 42 (H) x 68 (D) mm

(5-9/16” x 1-11/16” x 2-11/16”)

Weight : Approx. 300 g (0.71 lbs)

Cassette Adapter C-P7U

Dimensions : 188 (W) x 25 (H) x 104 (D) mm

(7-7/16” x 1” x 4-1/8”)

Weight : Approx. 240 g (0.53 lbs)

Accessory : “AA (R6)”-size battery x 1

COMPACT VHS CAMCORDER

TABLE OF CONTENTS

The following table indicate main different points between models GR-AX940U, AX940UC, AX840U, AX840UC, AX640U

and GR-AX640UC.

3. ELECTRICAL ADJUSTMENT

3.1 ELECTRICALADJUSTMENT ..................................................................................................................................... 3-1

3.2 ELECTRONIC VIEWFINDER (E. VF) ADJUSTMENT (For GR-AX640U/UC) ............................................................3-3

4. CHARTS AND DIAGRAMS

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

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

4.6 Y/C & AUDIO SCHEMATIC DIAGRAM..................................................................................................................... 4-11

4.10 REGULATOR SCHEMATIC DIAGRAM .................................................................................................................... 4-19

4.11 LCD CTL SCHEMATIC DIAGRAM............................................................................................................................ 4-22

4.12 MAIN CIRCUIT BOARD............................................................................................................................................4-23

4.17 POWER SYSTEM BLOCK DIAGRAM...................................................................................................................... 4-37

4.23 ELECTRONIC VIEWFINDER SCHEMATIC DIAGRAM (For AX640U/UC) .............................................................. 4-55

4.24 ELECTRONIC VIEWFINDER CIRCUIT BOARD (ForAX640U/UC)......................................................................... 4-57

5. PARTS LIST

5.6 ELECTRONIC VIEWFINDER ASSEMBLY <M4> [GR-AX640U/UC] ........................................................................ 5-19

5.5 ELECTRICAL PARTS LIST

E.VF BOARD ASSEMBLY (GR-AX640U/UC) <60>.................................................................................................. 5-18

VIEW FINDER Color Black/White

CASSETTE COVER Black Dark Glay

DC LIGHT

– – – –

GR-AX940U GR-AX940UC GR-AX840U GR-AX840UC GR-AX640U GR-AX640UC

MODEL

ITEM

Note: Mark – is not used. Mark Q is used. Mark is same as left.

The following table indicate different parts number between models GR-AX940U, AX940UC, AX840U, AX840UC, AX640U and

GR-AX640UC.

PACKING ASSEMBLY <M1>

2 PACKING CASE LY30905-018A LY30905-039A LY30905-011A LY30905-021A LY30905-017A LY30905-020A

5 INST. BOOK (EN) LYT0259-001A LYT0251-001A LYT0255-001B

7 REGIST. CARD BT-51006-1 – BT-51006-1 – BT-51006-1 –

13 WARRANTY CARD – BT-52002-1 – BT-52002-1 – BT-52002-1

14 INST. BOOK (FR) – LYT0321-001A – LYT0286-001A – LYT0286-001A

15 SER. NET CARD – BT-20071B – BT-20071B – BT-20071B

GR-AX940U GR-AX940UC GR-AX840U GR-AX840UC GR-AX640U GR-AX640UC

MODEL

ITEM

REF No.

FINAL ASSEMBLY <M2>

101 LOWER CASE ASSY LY10122-009B LY10122-008B

106 FRONT COVERASSY LY10124-010C LY10124-005C LY10124-005D LY10124-004C

106R COVER (LIGHT) – – LY30934-004A LY30934-003A

107 CASSETTE COVER ASSY LY10126-002A LY10126-001A

108 BUTTON (PUSH) ASSY LY30899-002B LY30899-002B LY30899-001B

110 TOP COVER LY10129-016B LY10129-009B LY10129-015B

116 DC LIGHTASSY LY30860-001A ––––

116A LAMP YQ44266 ––––

137 FRAMEASSY LY20372-001A LY20372-002A

137F CONTACT (LIGHT),X2 YQ43810 ––––

137G E-SI C WIRE C-F WJM0003-003A ––––

146 KNOB (LIGHT) LY41083-001B ––––

GR-AX940U GR-AX940UC GR-AX840U GR-AX840UC GR-AX640U GR-AX640UC

MODEL

ITEM

REF No.

ELECTRONIC VIEWFINDER ASSEMBLY <M4>

360 EVF ASSY LYH20038-002A ––

381 EVF ASSY – – – – LY20374-001A

GR-AX940U GR-AX940UC GR-AX840U GR-AX840UC GR-AX640U GR-AX640UC

MODEL

ITEM

REF No.

MAIN BOARD ASSEMBLY <01>

PW MAIN BOARD ASSY YB10243UC-01 YB10243UB-02 YB10243UA-02

IC3103 IC – – – – NJM2535V

IC4006 IC

TMS4C2973-28-X

––––

IC6002 IC MM1257AM ––

IC7101 IC (DIGITAL) TC7SET02FU ––

IC7102 IC (DIGITAL) TC7SET08FU ––

Q2061 TRANSISTOR 2SC4617/QR/-X –––`–

GR-AX940U GR-AX940UC GR-AX840U GR-AX840UC GR-AX640U GR-AX640UC

MODEL

ITEM

REF No.

Note: Mark – is not used. Mark is same as left.

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 ––––

D7101 SB DIODE RB715F ––

R142 MG RESISTOR – – – – NRSA63J-273X

R143 MG RESISTOR – – – – NRSA63J-393X

R144 MG RESISTOR NRSA63J-0R0X NRSA63J-153X

R501 MG RESISTOR NRSA63J-105X ––––

R2061 MG RESISTOR NRSA63J-103X ––––

R2062 MG RESISTOR NRSA63J-104X ––––

R2063 MG RESISTOR NRSA63J-104X ––––

R2064 MG RESISTOR NRSA63J-104X ––––

R2065 MG RESISTOR NRSA63J-183X NRSA63J-0R0X

R3125 MG RESISTOR – – – – NRSA63J-562X

R3126 MG RESISTOR – – – – NRSA63J-472X

R3127 MG RESISTOR – – – – NRSA63J-472X

R3128 MG RESISTOR – – – – NRSA63J-272X

R3132 MG RESISTOR NRSA63J-222X ––

R3134 MG RESISTOR NRSA63J-222X ––

R6201 MG RESISTOR NRSA63J-103X ––––

R6202 MG RESISTOR NRSA63J-103X ––––

R6203 MG RESISTOR NRSA63J-103X ––––

R6204 MG RESISTOR NRSA63J-103X ––––

R6205 MG RESISTOR NRSA63J-100X ––––

R6206 MG RESISTOR NRSA63J-102X ––––

R7102 MG RESISTOR NRSA63J-0R0X ––

R7103 MG RESISTOR NRSA63J-563X ––

R7106 MG RESISTOR NRSA63J-0R0X ––

R7107 MG RESISTOR NRSA63J-101X ––

R7108 CMF RESISTOR NRVA63D-182X ––

R7109 MG RESISTOR NRSA63J-0R0X ––

R7111 CMF RESISTOR NRVA63D-332X ––

R7112 CMF RESISTOR NRVA63D-561X ––

R7113 MG RESISTOR NRSA63J-0R0X ––

R7115 MG RESISTOR NRSA63J-0R0X ––

C2061 CAPACITOR NCB21EK-104X ––––

C2062 CAPACITOR NCF21CZ-105X ––––

C3107 CAPACTIOR – – – – NCB21AK-105X

C3108 CAPACITOR – – – – NCB31EK-103X

GR-AX940U GR-AX940UC GR-AX840U GR-AX840UC GR-AX640U GR-AX640UC

MODEL

ITEM

REF No.

Note: Mark – is not used. Mark is same as left.

GR-AX940U GR-AX940UC GR-AX840U GR-AX840UC GR-AX640U GR-AX640UC

MODEL

ITEM

REF No.

C4037 CAPACITOR NCF31EZ-104X ––––

C4038 CAPACITOR NCF31EZ-104X ––––

C6051 CAPACITOR NCB11CK-105X ––

C6052 T CAPACITOR NBP41DM-475X ––

C6053 CAPACITOR NCB11CK-105X ––

C6201 E CAPACITOR NEA71CM-106X ––––

C7101 CAPACITOR NCF31CZ-104X ––

C7102 CAPACITOR NCF31CZ-104X ––

C7103 CAPACITOR NCB31HK-102X ––

C7105 CAPACITOR NDC31HJ-270X ––

C7108 T CAPACTIOR NBE40JM-226X ––

C7112 T CAPACITOR NBE20JM-106X ––

L7101 COIL NQL144K-100X ––

L7103 COIL NQL144K-100X ––

SW503 SLIDE SWITCH NSW0092-001X ––––

CN11 FPC CONNECTOR QGF0507F1-20X ––

CN12 CONNECTOR – – – –

QGA1201F2-05X

CN14 CONNECTOR

QGA1201C2-02X

––––

F6004 MG RESISTOR/FUSE NRSA02J-0R0X

NMFZ006-R50X-K

F7101 FUSE

NMFZ006-R20X-K

––

BL BOARD ASSEMBLY <06>

PW2 BL BOARD ASSY YB20838B2-01 ––

GR-AX940U GR-AX940UC GR-AX840U GR-AX840UC GR-AX640U GR-AX640UC

MODEL

ITEM

REF No.

VF BOARD ASSEMBLY <10>

PW1 VF BOARD ASSY YB20838B1-01 ––

GR-AX940U GR-AX940UC GR-AX840U GR-AX840UC GR-AX640U GR-AX640UC

MODEL

ITEM

REF No.

E. VF BOARD ASSEMBLY <60>

PW VF BOARDASSY – – – – LY41289-001A

GR-AX940U GR-AX940UC GR-AX840U GR-AX840UC GR-AX640U GR-AX640UC

MODEL

ITEM

REF No.

Note: Mark – is not used. Mark is same as left.

SECTION 3

ELECTRICAL ADJUSTMENT

3.1 ELECTRICAL ADJUSTMENT

3.1.1 PREPARATION

1. Precaution

This model does not contain adjustment controls (VR).

General deck system, camera system and monitor system

adjustment are not required. However, if MAIN board need

replacement, please use original E2PROM on to new board.

Then adjustment are not required. And if parts such as the

following need replacement, special computerized adjust-

ment are required (Refer to sec. 3.1.1-4). Please contact to

JVC Service for detaile information.

• OP block

• E2PROM (IC105 of MAIN board)

In the event of malfunction with electrical circuits, trouble-

shooting with the aid of proper test instruments most be

done first, and then commence necessary repair, replace-

ment and adjustment, etc.

1. In case of wiring to chip test points for measurement, use

IC clips, etc. to avoid any stress.

2. Since connectors are fragile, carefully handle them in

disconnecting and connecting.

3. Shortcircuit between operation un it and DECK chassis.

2. Required test equipment

1. Color TV monitor.

2. AC power adapter

3. Oscilloscope (dual-trace type, observable 100 MHz or

higher frequency)

* It is recommended to use one observable 300 MHz or

higher frequency.

4. Digital voltmeter

5. Frequency counter (with threshold level adjuster)

6. Personal computer

3. Required adjustment tools

For detsails of special jigs necessary for adjustment, refer to

page 1-2 and 1-3 of the Section 1.

4. Setup for E. VF section adjustment

(For GR-AX640U/UC)

Referring to “SEC. 1 DISASSEMBLY” and connect the E.VF

WIRE to CN12 of the MAIN board.

Note:

•

Thisadjustmentfallsintoaspecialadjustment thatrequires

a personal computer.

For details, refer to “3.1.1 Preparation”.

SERIAL NO.

LABEL

Bottom case assy

Parts NO.

Adjustment ltem : 3.2

LY20374 SCREW

(LY20374)

Fig. 3-1-1 Connection for Service support system

JLIP

STOP

SP/EP

EJECT

REW

PUSH

PLAY/PAUSE

MENU/

DISPLAY

Service Support

System software

RS232C

COM Port

PC CABLE

QAM0099-002 Personal Computer

3-1

3.2 ELECTRONIC VIEWFINDER (E. VF) ADJUSTMENT

(For GR-AX640U/UC)

Notes:

•

Unless otherwise specified, all measurement points and

adjustment parts are located on E. VF board.

•

After adjustment or replacement of the deflection yoke or

thecenteringmagnet,fixitbythebandasshownthefigure

below.

CENTERING

MAGNET

CRT

TOP VIEW

STOPPER

Fig. 3-2-1 E. VF

•

Afteradjustmentiscompleted,comparethepictureonthe

E. VF screen with the monitor TV.

CENTERING

MAGNET

CRT

F.B.T

STOPPER

Fig. 3-2-2 E. VF

Fig. 3-2-3 E. VF board

Subject •Alignment tape

•Stairstep

Mode •PB

Equipment •E. VF

Measurement point •E. VF screen

Adjusting part •Deflection yoke

Specification •The picture is visible as

same as monitor TV.

3.2.1 Tilt

1) Put the deflection yoke to the most inner side of CRT neck

first. Then fix the stopper temporary.

2) Adjust the tilt of picture on the E. VF screen by tilting the

deflection yoke.

3) Fix the stopper completely.

3.2.2 Centering

Subject •Alignment tape

•Stairstep

Mode •PB

Equipment •E. VF

Measurement point •E. VF screen

Adjusting part •Centering magnet (CRT assy)

Specification •The center of the E. VF screen

1) While observing the viewfinder screen, adjust the centering

magnet to locate the stairstep in the center of the view-

finder screen.

Subject •Camera picture

Mode •EE

Equipment •E. VF

Measurement point •E. VF screen

Adjusting part •VR7001 (V. SIZE)

Specification •Normal picture amplitude

3.2.3 Vertical scanning

1) Observing the viewfinder screen, adjust VR7001 for

normal picture amplitude.

3.2.4 Brightness

Subject •–

Mode •EE

•Lens closed

Equipment •E. VF

Measurement point •E. VF screen

Adjusting part •VR7002 (BRIGHT)

Specification •The CRT raster is just barely

visible

1) Close the lens with the cap and adjust VR7002 so that

the raster of the CRT is just visible in the E. VF.

3.2.5 Focus

Subject •Camera picture

Mode •EE

Equipment •E. VF

Measurement point •E. VF screen

Adjusting part •VR7003 (FOCUS)

Specification •The center area is clear and

defined

1) While observing the viewfinder screen, adjust VR7003

so that the picture at the central area of the screen is

clear and defined.

VR7001

V. SIZE VR7002

BRIGHT

60E. VF PWB ASSY

CN7001

T7001

CN7002 VR7003

FOCUS

3-3

SECTION 4

CHARTS AND DIAGRAMS

4.1 BOARD INTERCONNECTIONS

4-3

ABCD

4-4

EFGH

4-5

4.2 CPU SCHEMATIC DIAGRAM

ABCD

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