JVC GR-SXM257UM User manual

SERVICE MANUAL
VIDEOCAMARA VHS COMPACTO
No. 86678
March 2002
This service manual is printed on 100% recycled paper.
COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD.
GR-SXM257UM,SXM357UM/UB,SXM757UM/UB
SPECIFICATIONS
Regarding service information other than these sections, refer to the GR-SXM340U and GR-SXM740U service
manual (No. 86656). Also, be sure to note important safety precautions provided in the service manual.
(The specifications shown pertain specifically to the model GR-AX787,SX887,SXM257,SXM357,SXM757,SXM957)
Adaptador de CA
Alimentación : 110 V a 240 V de CA, 50 Hz/60 Hz
Salida : CC 11 V
} , 1 A
Videocámara
Generalidades
Formato : Norma NTSC S-VHS
(GR-SXM957/SXM757/SXM357/SXM257/SX887 exclusivamente)/VHS
Alimentación: 11 V CC } (Empleando el adaptador de CA)
6 V CC
} (Utilizando la batería)
Consumo de energía
Visor conectado : 4.0 W (GR-SXM957/SXM757/SXM357/SXM257 exclusivamente)
3.7 W (GR-SX887/AX787exclusivamente)
Monitor LCD* conectado : 4.5 W (GR-SXM957/SXM757/SXM357/SXM257 exclusivamente)
Foco de video** : 3.0 W
*Sólo para modelos aplicables.
** GR-SXM957/SXM757/SXM357/SXM257/SX887 exclusivamente.
Sistema de señales : Tipo NTSC
Sistema de registro de video
Luminancia : Registro por FM
Color : Registro directo por subportadora convertida Según la norma VHS
Cassette : Videocassette
/
Velocidad de la cinta
SP : 33.35 mm/seg. (1-5/16 ips)
EP : 11.12 mm/seg. (7/16 ips)
Tiempo máximo de grabación
SP : 40 min.
EP : 120 min.
(con un cassette TC-40)
Temperatura de funcionamiento : 0°C a +40°C (32°F a 104°F)
Margen de humedadpara funcionamiento : 35% a 80%
Temperatura de almacenamiento : –20°C a +50°C (-4°F a 122°F)
Peso : Aprox. 930 g (2.1 lbs) (GR-SXM957 exclusivamente)
Aprox. 910 g (2.0 lbs) (GR-SXM757/SXM357/SXM257exclusivamente)
Aprox. 850 g (1.9 lbs) (GR-AX787 exclusivamente)
Aprox. 820 g (1.8 lbs) (GR-SX887 exclusivamente)
Dimensiones : 200 mm x 112 mm x 118 mm (7-7/8” x 4-7/16” x 4-11/16”)
(An x Al x Pr) (GR-SXM957/SXM757/SXM357/SXM257 exclusivamente)
200 mm x 112 mm x 115 mm (7-7/8” x 4-7/16” x 4-9/16”)
(GR-SX887/AX787 exclusivamente)
(con el monitor LCD* cerrado y con el visor totalmente inclinado hacia abajo)
*Sólo para modelos aplicables.
Fonocaptor : CCD de 1/4”
Objetivo : Objetivo zoom motorizado F1.6, f = 3.9 mm a 62.4 mm, objetivo de
zoom motorizado de 16:1 con diafragma automático y control de
macro, diámetro de filtro de 40.5 mm
Visor : Electrónico con pantalla catódica monocroma de 0.55” color LCD
(GR-SX887 exclusivamente)
Electrónico con pantalla catódica monocroma de 0.5”
(GR-SXM957/SXM757/SXM357/SXM257/AX787 exclusivamente)
Accesorios opcionales
•Baterías BN-V12U, BN-V20U, BN-V400U
•Cable A/V (Audio/Vídeo)
•Cable S-video QAM0004-004
•S-VHS ( ) Compacto (cassettes S-VHS-C)
ST-C40/30/20
•VHS ( ) Compacto (cassettes VHS-C) TC-40/30/20
•Bolso CB-V7U
Algunos accesorios no se encuentran disponibles en ciertas áreas. Por favor consulte
a su agente más cercano de JVC antes de comprar los accesorios opcionales.
Las especificaciones indicadas son para el modo SP a menos que se indique lo
contrario. E & O.E. El diseño y las especificaciones están sujetos a cambio sin aviso.
Ajuste del balance del blanco : Automático/manual
Monitor LCD : 3.5” medidas diagonalmente, sistema de matriz activa LCD/TFT
(sólo para (GR-SXM957 exclusivamente) 3” medidas diagonalmente,
modelos aplicables) sistema de matriz activa LCD/TFT (GR-SXM757
exclusivamente) 2.5” medidas diagonalmente, sistema de matriz
activa LCD/TFT (GR-SXM357/SXM257 exclusivamente)
Altavoz : Monofónico
(sólo para modelos aplicables)
Conectores
Video : 1 V (p-p), 75 Ødesequilibrada, salida analógica (vía conector de
salida de video)
Audio : Salida analógica de 300 mV (rms), 1 kØ (vía conector de salilda
de audio)
Digital : Jack con minicabeza
(GR-SXM957/SXM757 de ø3,5 mm, 4-polos
exclusivamente)
S-Video :Y: Salida analógica
(GR-SXM957/ 1 V (p-p), 75 Ø
SXM757/SXM357 C : Salida analógica
SXM257/SX887
exclusivamente) 0.29 V (p-p), 75 Ø

MODEL GR-SXM340U GR-SXM257UM GR-SXM357UM GR-SXM357UB
ITEM
TABLE OF CONTENTS
DIFFERENT TABLE .................................................................................................................................................................................... 1 to 3
5. PARTS LIST (5-1 to 5-6)
5.1 PACKING AND ACCESSORY ASSEMBLY <M1> ................................................................................................................................ 5-1
5.2 FINAL ASSEMBLY <M2> ...................................................................................................................................................................... 5-3
5.3 MONITOR ASSEMBLY <M5> [GR-SXM757UM/UB] ............................................................................................................................ 5-6
The following table indicate main different points between models GR-SXM340U, GR-SXM257UM, GR-SXM357UM
and GR-SXM357UB.
1
BODY COLOR METALLIC GRAY SILVER
TOTAL ZOOM RATIO 600X 700X
DIGITAL TERMINAL Used Not Used
AC ADAPTER AP-V12U AP-V12EG
REMOTE CONTROL UNIT Not Used Provided · RM-V715U Option
CASSETTE ADAPTER Provided · C-P7U Option
MODEL GR-SXM740U GR-SXM757UM GR-SXM757UB
ITEM
The following table indicate main different points between models GR-SX740U, GR-SXM757UM and GR-SXM757UB.
LCD MONITOR 3.5” 3.0”
TOTAL ZOOM RATIO 600X 700X
AC ADAPTER AP-V12U AP-V12EG
REMOTE CONTROL UNIT Not Used Provided · RM-V715U Option
CASSETTE ADAPTER Provided · C-P7U Option
PACKING AND ACCESSORY ASSEMBLY <M1> Note: As for IB (INSTRUCTIONS), refer to sec.5.
The following table indicate different parts number between models GR-SXM340U, GR-SXM257UM, GR-SXM357UM and GR-SXM357UB.
!
REF.
MODEL GR-SXM340U GR-SXM257UM GR-SXM357UM GR-SXM357UB
No. ITEM
1 PACKING CASE LY32545-001B LY32563-035A LY32563-025A —
6 REGIST.CARD BT-51028-1 — — —
7 WARRANTY INF. BT-51005-5 — — —
9 SHEET(AGREMENT) LYT0934-001A — — —
!11 AC ADAPTER LY20848-001B LY20847-001C
!12 POWER CORD — — — QMPS110-190-JR
16 BATTERY AA(R6) —
19 REMOTE CONTROL UNIT — — LY42129-001A —
20 BATTERY,X2 — — AAA(R03) —
21 CASSETTE ADAPTER YQ31963B-3 —
22 POLY BAG YQ43446 —
32 PC CONNECTION CABLE QAM0384-001 — — —
33 CORE FILTER QQR1266-001 — — —
34 CD ROM ASSY LY32210-020B — — —
36 SHEET(ATT.) LYT0974-001A — — —
37 SHEET(CORRECT.) — *LYT1039-001A * —
38 SHEET(CORRECT.) — *LYT1016-001A * —
Notes : Mark is same as left.
Mark — is not used.
Mark * reference model was also changed.

2
FINAL ASSEMBLY <M2>
!
REF.
MODEL GR-SXM340U GR-SXM257UM GR-SXM357UM GR-SXM357UB
No. ITEM
101 CASSETTE COVER(M)ASSY LY20694-012A LY20694-011A
103 UPPER CASE(M) LY10257-054A LY10257-067A LY10257-064A
110 LOWER CASE ASSY LY20684-023A LY20684-022A LY20684-023A
125 TOP OPERATION UNIT LY20614-012C LY20614-020B LY20614-009C
130 REAR UNIT LY20615-007B LY20615-005E
!135 FRONT COVER ASSY LY20683-036A LY20683-048A LY20683-044A
135H STICKER(C) LY32060-003A LY32060-005A LY32060-003A
139 TAP SCREW —*QYSPSTU1725M * *
142 SCREW QYSPSPU1720Z(,X2) *QYSPSPU1720Z(,X1) * *
MECHANISM ASSEMBLY <M3>
!
REF.
MODEL GR-SXM340U GR-SXM257UM GR-SXM357UM GR-SXM357UB
No. ITEM
400 MECHA(B)ASSY YMA0034A-E YMA0036A-E
444 CAPSTAN MOTOR QAR0212-001 QAR0212-002
MONITOR ASSEMBLY <M5>
!
REF.
MODEL GR-SXM340U GR-SXM257UM GR-SXM357UM GR-SXM357UB
No. ITEM
!500 MONITOR ASSY LY20836-005A LY20836-015A
!501 MONITOR COVER ASSY LY20834-004A LY20834-007A
505 HINGE COVER(UPPER) LY31939-004A LY31939-001A
MAIN BOARD ASSEMBLY <01>
!
REF.
MODEL GR-SXM340U GR-SXM257UM GR-SXM357UM GR-SXM357UB
No. ITEM
PW1 MAIN BOARD ASSY YB10356UB1-01 YB10356UO1-01 YB10356UG1-01
IC105 IC(DIGITAL) TC7S66FU-X ———
IC1801 IR DETECT UNIT ——PIC-26043S
IC4002 IC Z4C2973-32-X —Z4C2973-32-X
IC8001 IC MAX3221CAE —— —
D8001 ZENER DIODE EMZ6.8N —— —
D8002 ZENER DIODE EMZ6.8N —— —
R182 MG RESISTOR NRSA63J-105X —— —
R4013 MG RESISTOR NRSA63J-102X —NRSA63J-102X
R8001 MG RESISTOR NRSA63J-331X —— —
R8002 MG RESISTOR NRSA63J-0R0X —— —
R8003 MG RESISTOR NRSA63J-0R0X —— —
C140 CAPACITOR —*NDC31HJ-220X * *
C144 CAPACITOR —*NDC31HJ-101X * *
C4006 CAPACITOR —NDC31HJ-100X ——
C4024 CAPACITOR NCF31EZ-104X —NCF31EZ-104X
C4044 CAPACITOR NCB30JK-105X —NCB30JK-105X
C8001 CAPACITOR NCF31EZ-104X —— —
C8002 CAPACITOR NCF31EZ-104X —— —
C8003 CAPACITOR NCF31EZ-104X —— —
C8004 CAPACITOR NCF31EZ-104X —— —
C8005 T CAPACITOR NBE20JM-106X —— —
C8006 CAPACITOR NCF31EZ-104X —— —
L501 MG RESISTOR NRSA63J-0R0X —— —
L8001 COIL NQL365K-220X —— —
MONITOR BOARD ASSEMBLY <07>
!
REF.
MODEL GR-SXM340U GR-SXM257UM GR-SXM357UM GR-SXM357UB
No. ITEM
C7616 CAPACITOR NDC31HJ-330X *NDC31HJ-560X * *
Notes : Mark is same as left.
Mark —is not used.
Mark * reference model was also changed.

3
PACKING AND ACCESSORY ASSEMBLY <M1> Note: As for IB (INSTRUCTIONS), refer to sec.5.
The following table indicate different parts number between models GR-SXM740U, GR-SXM757UM and GR-SXM757UB.
!
REF.
MODEL GR-SXM740U GR-SXM757UM GR-SXM757UB
No. ITEM
1 PACKING CASE LY32545-006B LY32563-033A —
6 REGIST.CARD BT-51028-1 ——
7 WARRANTY INF. BT-51005-5 ——
!11 AC ADAPTER LY20848-001B LY20847-001C
!12 POWER CORD ——QMPS110-190-JR
16 BATTERY AA(R6) —
19 REMOTE CONTROL UNIT —LY42129-001A —
20 BATTERY,X2 —AAA(R03) —
21 CASSETTE ADAPTER YQ31963B-3 —
22 POLY BAG YQ43446 —
33 CORE FILTER QQR1266-001 ——
37 SHEET(CORRECT.) —*LYT1039-001A —
38 SHEET(CORRECT.) —*LYT1016-001A —
FINAL ASSEMBLY <M2>
!
REF.
MODEL GR-SXM740U GR-SXM757UM GR-SXM757UB
No. ITEM
101 CASSETTE COVER(M)ASSY LY20815-001A LY20694-011A
103 UPPER CASE(M) LY10257-056A LY10257-066A
130 REAR UNIT LY20764-010A LY20615-007B LY20615-007A
!135 FRONT COVER ASSY LY20683-035A LY20683-046A
139 TAP SCREW —*QYSPSTU1725M *
142 SCREW QYSPSPU1720Z(,X2) *QYSPSPU1720Z(,X1) *
MECHANISM ASSEMBLY <M3>
!
REF.
MODEL GR-SXM740U GR-SXM757UM GR-SXM757UB
No. ITEM
400 MECHA(B)ASSY YMA0034A-E YMA0036A-E
444 CAPSTAN MOTOR QAR0212-001 QAR0212-002
MONITOR ASSEMBLY <M5>
!
REF.
MODEL GR-SXM740U GR-SXM757UM GR-SXM757UB
No. ITEM
!500 MONITOR ASSY LY20836-007A LY20836-010A
!501 MONITOR COVER ASSY LY20816-001A LY20834-007A
501C SPACER(A) —LY30029-0R3A
501D SPACER(A) —LY30029-0R4A
502 MONITOR CASE ASSY LY32544-001A LY32035-001A
504 SHIELD CASE LY32334-001A LY32332-001A
518 LCD MODULE QLD0212-001 QLD0213-001
519 LIGHT SCREEN —LY43391-001A
520 LAMP —QLL0111-001
521 HOLDER,X2 —LY43394-001
522 SHEET —LY43395-001A
523 DIFFUSION SHEET(3) —LY43363-001A
528 LCD FRAME LY32335-001A LY32333-001A
530 BACK LIGHT QLL0113-001 ——
MAIN BOARD ASSEMBLY <01>
!
REF.
MODEL GR-SXM740U GR-SXM757UM GR-SXM757UB
No. ITEM
PW1 MAIN BOARD ASSY YB10356UK1-01 YB10356UC1-01
IC1801 IR DETECT UNIT —PIC-26043S
C140 CAPACITOR —*NDC31HJ-220X *
C144 CAPACITOR —*NDC31HJ-101X *
MONITOR BOARD ASSEMBLY <07>
PW MONITOR BOARD ASSY YB20913F YB20913E
Q7607 TRANSISTOR DTC144EE ——
R7622 MG RESISTOR NRSA63J-0R0X ——
R7647 MG RESISTOR —NRSA63J-0R0X
R7648 MG RESISTOR NRSA63J-103X ——
R7649 MG RESISTOR —NRSA63J-333X
R7650 MG RESISTOR NRSA63J-103X ——
!
REF.
MODEL GR-SXM740U GR-SXM757UM GR-SXM757UB
No. ITEM
Notes : Mark is same as left.
Mark —is not used.
Mark * reference model was also changed.

Printed in Japan
VICTOR COMPANY OF JAPAN, LIMITED
VIDEO DIVISION
S40894