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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
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
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TABLE OF CONTENTS
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
MODEL
GR-AX760U
–– LY42129-001A
–– USED
GR-AX777UM
GR-AX760U GR-AX777UM
–– WJM0167-001A
GR-SX877UM
GR-SX877UM
1
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MECHANISM ASSEMBL Y <M3>
REF
!
NO.
400 MECHA(B) ASSY YMA0030-E YMA0031A-E
406 C.GUIDE(R) ASSY –– YQ44339A-7
406A SW.LEVER(R) –– YQ32162-1-3
406B TORSION SPRING –– YQ44340-1-4
407 TAP SCREW –– LY42819-001A
466 ROTARY ENCODER QSW0888-001
ELECTRONIC VIEWFINDER ASSEMBLY <M4>
REF
!
NO.
! 300
! 350
ITEM
ITEM
ELECTRONIC VIEWFINDER ASSY(COLOR)
ELECTRONIC VIEWFINDER ASSY(B/W)
MODEL
MODEL
GR-AX760U GR-AX777UM
GR-AX760U GR-AX777UM
–– LYH20242-001A
LY20701-001A ––
GR-SX877UM
QSW0888-002
GR-SX877UM
MAIN BOARD ASSEMBLY <01>
REF
!
NO.
PW1 MAIN BOARD ASSY YB10310UA-03 YB10310UN-03 YB10310UO-04
IC1801 IR DETECT UNIT –– PIC-26043S
IC7001 IC –– CDX3518R
IC7005 IC –– BA4558F-X
IC7008 IC –– SN74LV4052APW-X
Q3006 DIGI TRANSISTOR –– DTC144EE-X
Q3505 DIGI TRANSISTOR –– DTC144EE-X
Q4705 TRANSISTOR –– 2SC4617/QR/-X
Q4706 TRANSISTOR –– 2SC4617/QR/-X
Q4707 TRANSISTOR –– 2SC4617/QR/-X
Q4711 PAIR TRANSISTOR –– PUMX1-W
Q4712 PAIR TRANSISTOR –– PUMT1-W
Q4713 PAIR TRANSISTOR –– PUMX1-W
Q4714 PAIR TRANSISTOR –– PUMT1-W
Q4715 PAIR TRANSISTOR –– HN1C01FU/G/-X
Q6306 MOS FET –– SSM3K02F-X
Q7001 PAIR TRANSISTOR –– PUMX1-W
Q7003 PAIR TRANSISTOR –– PUMX1-W
Q7005 PAIR TRANSISTOR –– PUMX1-W
Q7023 TRANSISTOR 2SA1774/QR/-X ––
D3001 SI DIODE –– DAN222-X
D7001 VARI CAP DIODE –– MA365-X
R3027 MG RESISTOR –– NRSA63J-103X
R4701 MG RESISTOR NRSA63J-0R0X ––
R4702 MG RESISTOR NRSA63J-680X NRSA63J-820X
R4711 MG RESISTOR –– NRSA63J-121X
R4712 CMF RESISTOR –– NRVA63D-561X
R4713 MG RESISTOR –– NRSA63J-681X
R4714 MG RESISTOR –– NRSA63J-122X
R4715 MG RESISTOR –– NRSA63J-0R0X
R4716 CMF RESISTOR –– NRVA63D-561X
R4717 CMF RESISTOR –– NRVA63D-222X
R4718 MG RESISTOR –– NRSA63J-104X
R4719 MG RESISTOR –– NRSA63J-222X
R4720 MG RESISTOR NRSA63J-0R0X ––
R4721 CMF RESISTOR –– NRVA63D-680X
R4723 CMF RESISTOR
Note: Mark –– is not used. Mark is same as left.
ITEM
MODEL
GR-AX760U GR-AX777UM
–– NRVA63D-680X
GR-SX877UM
2
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REF
!
NO.
R4735 MG RESISTOR –– NRSA63J-332X
R4736 MG RESISTOR –– NRSA63J-332X
R4737 MG RESISTOR –– NRSA63J-104X
R4738 MG RESISTOR –– NRSA63J-332X
R4739 MG RESISTOR –– NRSA63J-332X
R4741 CMF RESISTOR –– NRVA63D-152X
R4743 CMF RESISTOR –– NRVA63D-223X
R4744 CMF RESISTOR –– NRVA63D-222X
R4745 CMF RESISTOR –– NRVA63D-681X
R4746 CMF RESISTOR –– NRVA63D-222X
R4747 CMF RESISTOR –– NRVA63D-681X
R6306 MG RESISTOR –– NRS12BK-R47W
R6307 MG RESISTOR –– NRSA63J-104X
R7002 MG RESISTOR –– NRSA63J-102X
R7003 MG RESISTOR –– NRSA63J-103X
R7004 MG RESISTOR –– NRSA63J-333X
R7005 MG RESISTOR –– NRSA63J-103X
R7007 CMF RESISTOR –– NRVA63D-473X
R7008 CMF RESISTOR –– NRVA63D-913X
R7061 CMF RESISTOR –– NRVA63D-183X
R7062 CMF RESISTOR –– NRVA63D-334X
R7077 CMF RESISTOR –– NRVA63D-682X
R7078 CMF RESISTOR –– NRVA63D-822X
R7079 MG RESISTOR –– NRSA63J-0R0X
R7083 MG RESISTOR –– NRSA63J-105X
R7085 CMF RESISTOR –– NRVA63D-822X
R7086 CMF RESISTOR –– NRVA63D-123X
R7088 CMF RESISTOR –– NRVA63D-223X
R7090 CMF RESISTOR –– NRVA63D-822X
R7091 CMF RESISTOR –– NRVA63D-123X
R7093 CMF RESISTOR –– NRVA63D-223X
R7095 CMF RESISTOR –– NRVA63D-822X
R7096 CMF RESISTOR –– NRVA63D-123X
R7098 CMF RESISTOR –– NRVA63D-223X
R7099 CMF RESISTOR –– NRVA63D-103X
R7100 CMF RESISTOR –– NRVA63D-103X
R7101 CMF RESISTOR –– NRVA63D-103X
R7102 CMF RESISTOR –– NRVA63D-103X
R7103 CMF RESISTOR –– NRVA63D-103X
R7124 CMF RESISTOR –– NRVA63D-103X
R7137 CMF RESISTOR NRVA63D-911X ––––
R7138 CMF RESISTOR NRVA63D-271X ––––
R7212 MG RESISTOR –– NRSA63J-0R0X
C3033 C CAPACITOR –– NCB31CK-104X
C4708 C CAPACITOR –– NDC31HJ-820X
C4709 C CAPACITOR –– NDC31HJ-150X
C4710 C CAPACITOR –– NCB31EK-103X
C4711 C CAPACITOR –– NCB21CK-105X
C4715 C CAPACITOR –– NCB21CK-105X
C4719 C CAPACITOR –– NCB31EK-103X
C6307 E CAPACITOR –– NEA71CM-106X
C7003 TA E CAPACITOR –– NBE20JM-335X
C7004 C CAPACITOR –– NCB31HK-332X
C7005 C CAPACITOR –– NCB31EK-103X
C7006 C CAPACITOR –– NDC31HJ-390X
C7007 C CAPACITOR –– NCB31HK-102X
C7008 C CAPACITOR
Note: Mark –– is not used. Mark is same as left.
ITEM
MODEL
GR-AX760U GR-AX777UM
–– NCB31EK-103X
GR-SX877UM
3
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REF
!
NO.
C7012 C CAPACITOR –– NCB31CK-104X
C7021 TA E CAPACITOR –– NBP41EM-475X
C7022 C CAPACITOR –– NCB31EK-103X
C7024 TA E CAPACITOR –– NBP41EM-475X
C7041 TA E CAPACITOR –– NBE21AM-106X
C7045 C CAPACITOR NDC31J-100X ––
C7046 C CAPACITOR NDC31J-100X ––
C7047 C CAPACITOR NDC31J-100X ––
C7048 TA E CAPACITOR NBE20JM-106X ––
C7053 C CAPACITOR –– NCB31CE-103X
C7054 TA E CAPACITOR –– NBP41EM-475X
C7056 C CAPACITOR –– NCB21CK-104X
C7058 C CAPACITOR –– NCB31CK-104X
C7061 C CAPACITOR –– NCB11CK-475X
C7062 C CAPACITOR –– NCB11CK-475X
C7063 C CAPACITOR –– NCB11CK-475X
C7067 C CAPACITOR –– NCB31CK-104X
C7069 C CAPACITOR –– NCB31EK-103X
L6306 INDUCTOR –– NQL52EM-470X
L7002 INDUCTOR –– NQL085J-8R2X
L7005 P COIL –– NQL38DK-220X
L7007 P COIL –– NQL38DK-220X
L7008 P COIL –– NQL38DK-220X
L7012 P COIL NQL144K-100X ––
CN11 FPC CONNECTOR –– QGF0507F1-20X
CN12 W TO B CONNECTOR QGA1201F2-05X ––
J505 S JACK –– QND0068-001
ITEM
MODEL
GR-AX760U GR-AX777UM
GR-SX877UM
ELECTRONIC VIEWFINDER ASSEMBLY<M4>
REF
!
NO.
PW1 C-VF BL BOARD ASSY
Note: Mark –– is not used. Mark is same as left.
ITEM
MODEL
GR-AX760U GR-AX777UM
–– YB20901A
GR-SX877UM
4
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VICTOR COMPANY OF JAPAN, LIMITED
VIDEO DIVISION
S40894
Printed in Japan
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