JVC GR-AX777UM Service Manual

SERVICE MANUAL

COMPACT VHS CAMCORDER

GR-AX777UM,SX877UM

Regarding service information other than these sections, refer to the GR-AX760U service manual (No.86596). Also, be sure to note important safety precautions provided in the service manual.

SPECIFICATIONS

Camcorder

General

Format : S-VHS (GR-SXM747UM/

Power source : DC 11 V

Power consumption

Viewfinder on : 4.0 W (GR-SXM747UM/

LCD monitor* on : 4.5 W (GR-SXM747UM/

Video light** : 3.0 W

* Models equipped with LCD monitor only. ** GR-SXM747UM/SXM347UM/SXM247UM/SX877UM

only.

Signal system : NTSC-type Video recording system

Luminance : FM recording Color : Converted sub-carrier

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

SXM347UM/SXM247UM/ SX877UM only)/VHS NTSC standard

(Using AC Adapter) DC 6 V

(Using battery pack)

SXM347UM/SXM247UM only)

3.7 W (GR-SX877UM/ AX777UM only)

SXM347UM/SXM247UM only)

direct recording Conforms to VHS standard

/ cassette

(–4°F to 122°F)

(The specifications shown pertain specifically to the model GR-AX777UM,GR-SX877UM)

Weight : Approx. 910 g (2.0 lbs)

Dimensions : 206 mm x 112 mm x 118 mm (W x H x D) (8-1/8" x 4-7/16" x 4-11/16")

*Models equipped with LCD monitor only. Pickup : 1/4" format CCD

Lens : F1.6, f = 3.9 mm to 62.4 mm,

Viewfinder : Electronic viewfinder with

White balance

adjustment : Auto/Manual adjustment LCD monitor : 3" diagonally measured, LCD (models equipped with

LCD monitor only)

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

without notice.

(GR-SXM747UM only) Approx. 900 g (2.0 lbs) (GR-SXM347UM/SXM247UM only) Approx. 730 g (1.6 lbs) (GR-SX877UM only) Approx. 720 g (1.6 lbs) (GR-AX777UM only)

(GR-SXM747UM/SXM347UM/ SXM247UM only) 206 mm x 112 mm x 115 mm (8-1/8" x 4-7/16" x 4-9/16") (GR-SX877UM/AX777UM only) (with the LCD monitor* closed and with the viewfinder full tilted downward)

16:1 power zoom lens with auto iris and macro control, filter diameter 40.5 mm

0.55" color LCD (GR-SX877UM only)

Electronic viewfinder with 0.5" black/white CRT (GR-SXM747UM/SXM347UM/ SXM247UM/AX777UM only)

panel/TFT active matrix system (GR-SXM747UM only)

2.5" diagonally measured, LCD panel/TFT active matrix system (GR-SXM347UM/SXM247UM only)

Speaker : Monaural (models equipped with LCD monitor only)

Connectors

Video : 1 V (p-p), 75 Ω unbalanced,

Audio : 300 mV (rms), 1 kΩ analog

S-Video : Y : 1 V (p-p), 75 Ω, (

GR-SXM747UM/ SXM347UM/SXM247UM/ SX877UM only

analog output (via Video output connector)

output (via Audio output connector)

C : 0.29 V (p-p), 75 Ω,

)

analog output

AC Adapter AP-V10U

Power requirement : AC 110 V to 240 V`,

Output : DC 11 V , 1 A Dimensions : 59 mm x 31 mm x 69 mm

(W x H x D) (2-3/8" x 1-1/4" x 2-3/4") Weight : Approx. 130 g (0.29 lbs)

Optional Accessories

• Battery Packs BN-V12U, BN-V20U, BN-V400U

• A/V (Audio/Video) Cable

• S-Video Cable QAM0004-004

• Compact S-VHS (

• Compact VHS (

• Active Carrying Bag CB-V7U

Some accessories are not available in some areas. Please consult your nearest JVC dealer for details on accessories and their availability.

50 Hz/60 Hz

) Cassettes ST-C-40/30/20

) Cassettes TC-40/30/20

No.86611

January 2001

DIFFERENT TABLE ..................................................................................................................................................... 1 to 4

4. CHARTS AND DIAGRAM

4.1 LCD CTL SCHEMATIC DIAGRAM ........................................................................................................................4-1

4.2 C-VF BL SENSOR SCHEMATIC DIAGRAM ..........................................................................................................4-3

4.3 MAIN CIRCUIT BOARD ........................................................................................................................................ 4-5

4.4 C-VF CIRCUIT BOARD ....................................................................................................................................... 4-11

5. PARTS LIST

5.1 PACKING AND ACCESSORY ASSEMBLY <M1> ................................................................................................. 5-1

5.2 ELECTRONIC VIEWFINDER ASSEMBLY <M4> ................................................................................................... 5-3

The following table indicate main different points between models GR-AX760U,GR-AX777UM and GR-SX877UM.

ITEM

VIEW FINDER B/W COLOR VIDEO LIGHT NOT USED USED IR RECEVER NOT USED USED BODY COLOR MOLD BLACK SILVER TOTAL ZOOM RATIO 400 X 600 X LIGHT SW NOT USED USED DIGITAL ZOOM 50 X/400 X/OFF 50 X/600 X/OFF S-VHS ON/OFF NOT USED USED S OUT PUT NOT USED USED REMOTE CONTROL UNIT(RM-V715U) NOT USED USED

Note: Mark is same as left.

MODEL

GR-AX760U

GR-AX777UM

GR-SX877UM

The following table indicate different parts number between models GR-AX760U,GR-AX777UM and GR-SX877UM. PACKING AND ACCESSORY ASSEMBL Y <M1>

REF

NO.

1 PACKING CASE LY32179-001A LY32054-0A4A LY32054-0A6A

! 5 IB(EN) LYT0689-001B LYT0731-001A ! IB(SP) LYT0731-002A

7 REGIST.CARD BT-51020-2 –– 16 18 BATTERY,X2,AAA(R03)

FINAL ASSEMBL Y <M2>

REF

NO.

! 101 LOWER CASE ASSY LY20684-001B LY20684-003B

104 FRONT COVER ASSY LY20683-002B LY20683-006B LY20683-018A 104E DC LIGHT –– LY32040-001A

104F SPACER(A) –– LY30029-0B4A

! 104H CAUTION LABEL –– YQ44341-6

104J STICKER(A) LY32058-001A LY32058-002A 105 CASS.COVER(S) ASSY LY20680-002A LY20680-009A 105D WINDOW(S) LY32023-002A LY32023-003A 105E STICKER(B) LY32059-001A LY32059-002A 106 UPPER CASE(S) LY10272-007A LY10272-011A LY10272-012A 109 TOP OPE UNIT LY20614-004B LY20614-001B 130 FRAME ASSY LY20678-002A LY20678-001A 130E CONTACT(LIGHT) –– YQ43810-1-1 130F E-SI C WIRE C-F

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

ITEM

REMOTE CONTROLLER

ITEM

COVER(LIGHT) LY30934-015A LY30934-017A ––

MODEL

GR-AX760U

–– LY42129-001A –– USED

GR-AX777UM

GR-AX760U GR-AX777UM

–– WJM0167-001A

GR-SX877UM

+ 4 hidden pages

JVC GR-AX777UM Service Manual

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