JVC GR-SXM250US Service Manual

JVC GR-SXM250US Service Manual

Compact vhs camcorder
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SERVICE MANUAL
COMPACT VHS CAMCORDER
02
2003
86721
GR-SXM250U
GR-SXM750U
For disassembling and assembling of MECHANISM ASSEMBLY, refer to the SERVICE MANUAL No.86700 (MECHANISM ASSEMBLY).
SPECIFICATION
(The specifications shown pertain specifically to the model GR-SXM755)
Camcorder
General
Format
: S-VHS/VHS NTSC standard
Power source
: DC 11 V
DC 6 V
Power consumption
Viewfinder on
: 4.5 W
: 5.0 W
LCD monitor on
Video light
: 3.0 W
Signal system
: NTSC-type
Video recording system
Luminance
: FM recording
Colour
: Converted sub-carrier direct recording
Conforms to VHS standard
Cassette
:
Tape speed
SP
: 33.35 mm/sec. (1-5/16 ips)
LP
: 11.12 mm/sec. (7/16 ips)
Recording time (max.)
SP
: 40 minutes
LP
: 120 minutes (with TC-40 cassette)
Operating
temperature
: 0ºC to 40ºC (32ºF to 140ºF)
Operating humidity
: 35% to 80%
Storage temperature
: -20ºC to 50ºC (-4ºF to 122ºF)
Weight
: Approx. 870 g
Dimensions (W x H x D) : 113 mm x 117 mm x 199 mm
(4-1/2" x 4-5/8" x 7-7/8")
: 1/6" format CCD
Pickup
Lens
: F1.6, f = 2.7 mm to 43.2 mm,
16:1 power zoom lens with auto iris and
macro control, filter diameter 40.5 mm
Viewfinder
: Electronic viewfinder with 0.5" black/white CRT
White balance
: Auto/Manual adjustment
adjustment
,GR-SXM755U
S
(Using AC Adapter)
(Using battery pack)
/
cassette
GR-SXM250US,GR-SXM750UC,GR-SXM750US,GR-SXM755UC,GR-SXM755US M3C623,M3C643
COPYRIGHT © 2003 VICTOR COMPANY OF JAPAN, LTD.
,GR-SXM750U
S
,GR-SXM755U
C
: 3.5" diagonally measured, LCD
LCD monitor
: Monaural
Speaker
Connectors
:
Video
:
Audio
:
S-Video
Power requirement
:
U.S.A and Canada
:
Other countries
:
Output
Optional Accessories
• Battery Packs BN-V12U, BN-V20U, BN-V400U
• Compact S-VHS (
• Compact VHS (
) Cassettes TC-40/30/20
• Active Carrying Bag CB-V7U
• Cassette Adapter C-P7U
• A/V (Audio/Video) Cable
• S-Video cable
Some accessories are not available in some areas.
Please consult your nearest JVC dealer for details on accessories and
their availability.
C
S
1 V (p-p), 75
unbalanced, analog output
(via Video output connector)
300 mV (rms), 1 k
, analog output
(via Audio output connector)
Y: 1 V (p-p), 75
, analog output
C: 0.29 V (p-p), 75
, analog output
AC Adapter
AC 120 V ~, 60 Hz
AC 110 V to 240 V ~, 50 Hz/60 Hz
DC 11 V
, 1 A
) Cassettes ST-C-40/30/20
No.86721
2003/02

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Summary of Contents for JVC GR-SXM250US

  • Page 1 40.5 mm Some accessories are not available in some areas. Viewfinder : Electronic viewfinder with 0.5" black/white CRT Please consult your nearest JVC dealer for details on accessories and White balance : Auto/Manual adjustment their availability.
  • Page 2: Table Of Contents

    E.VF BOARD ASSEMBLY <60> ............. . . 3-16 GR-SXM250US...
  • Page 3: Precautions

    SECTION 1 PRECAUTIONS 1.1 SAFTY PRECAUTIONS Prior to shipment from the factory, JVC products are strictly in- ray tubes and other parts with only the specified parts. Under spected to conform with the recognized product safety and elec- no circumstances attempt to modify these circuits.Unautho-...
  • Page 4 1.1.2 Safety Check after Servicing Examine the area surrounding the repaired location for damage (4) Leakage current test or deterioration. Observe that screws, parts and wires have been Confirm specified or lower leakage current between earth returned to original positions, Afterwards, perform the following ground/power cord plug prongs and externally exposed ac- tests and confirm the specified values in order to verify compli- cessible parts (RF terminals, antenna terminals, video and...
  • Page 5: Specific Service Instructions

    SECTION 2 SPECIFIC SERVICE INSTRUCTIONS 2.1 BEFORE ASSEMBLY AND DISASSEMBLY 2.1.1 Precautions 2.1.4 Disconnection of connectors (Wires) 1. Be sure to disconnect the power supply unit prior to mount- Pull both ends of the connector in the arrow direction, remove the ing and soldering of parts.
  • Page 6: Assembly And Disassembly Of Cabinet Parts

    2.2 ASSEMBLY AND DISASSEMBLY OF CABINET PARTS 2.2.1 Disassembly flow chart 2.2.2 Disassembly method This flowchart indicates the disassembly step for the cabinet STEP Fig. parts and board assembly in order to gain access to item(s) to be PART POINT NOTE serviced.
  • Page 7 CN1a CN1b CN1c (S1) 9 (S2) 10 (S2) 11 (S2) (S1) (S1) (S1) (S1) (S1) (S1) (S1) Fig.C1 <SHOOTING MODEL> (S4) <MONITOR MODEL> Fig.C2 (No.86721)1-7...
  • Page 8 (S5a) <NOTE 5> <SHOOTING MODEL> (S5a) (S5a) (S5a) (S5a) <MONITOR MODEL> <NOTE 5> (S5a) (S5b) (S5a) (S5a) (S5a) (S5a) (S5a) Fig.C3 <MONITOR MODEL> (S7b) <NOTE 7a> (S7b) (S7a) <NOTE 7c> (S6) DO NOT MAKE FPC (S6) SLACKEN IN THIS PART. <NOTE 7d>...
  • Page 9 0.118N m (1.2kgf (S11) (S8) <NOTE 11> <NOTE 8a> [11] OP BLOCK ASSEMBLY (S11) <NOTE 8b> PASS THE WIRE BETWEEN THESE BOSSES. LIGHT WIRE CN8a DO NOT OBSTRUCT THE RECEIVING PART OF SENSOR CN8b BY WIRE . PASS THE WIRE OUTSIDE OF SCREWING SEQUENCE MIC WIRE...
  • Page 10: Assembly And Disassembly Of [2]Op Block Assemblyccd Board Assembly (Camera Section And Board Assembly)

    2.3 ASSEMBLY AND DISASSEMBLY OF CAMERA SECTION AND BOARD ASSEMBLY 2.3.1 Disassembly flow chart This flowchart indicates the disassembly step for the cabinet parts and board assembly in order to gain access to item(s) to be serviced. When reassembling, perform the step(s) in reverse or- der.
  • Page 11 (S4d) (S4c) <NOTE 4> CN1h FRAME ASSEMBLY CN1g C2 J CN1f CN1a SHIELD CASE (MAIN) CN1b CN1j CN1d CN1c (S4c) (S1) CN1e (S1) SHIELD Fig.D1 (S4a) (S4b) Fig.D3 (S2) (S2) <NOTE 3> FRAME ASSEMBLY (S5) (S5) Fig.D2 Fig.D4 (No.86721)1-11...
  • Page 12 2.4 ASSEMBLY AND DISASSEMBLY OF [7]MONITOR ASSEMBLY (CABINET PARTS) 2.4.1 Disassembly of MONITOR ASSEMBLY <2.5 TYPE> NOTE : Be careful not to soil or scratch the monitor screen through the disassembly/assembly work. (1) While removing the three screws 1 to 3 in numerical order and disengaging the two hooks (L7a and L7b) in alphabet- (S7a) ical order, remove the MONITOR COVER ASSEMBLY.
  • Page 13 2.4.2 Disassembly of MONITOR ASSEMBLY <3.5 TYPE> NOTE : Be careful not to soil or scratch the monitor screen through the disassembly/assembly work. (1) While removing the three screws 1 to 3 in numerical order MONITOR COVER and disengaging the two hooks (L7a and L7b) in alphabet- ASSEMBLY ical order, remove the MONITOR COVER ASSEMBLY.
  • Page 14 2.5 ASSEMBLY AND DISASSEMBLY OF [2]OP BLOCK ASSEMBLY CCD BOARD ASSEMBLY (CAMERA SECTION AND BOARD ASSEMBLY) 2.5.1 Precautions 2.5.3 Assembly of CCD BASE ASSEMBLY and CCD (1) Take care in handling the CCD IMAGE SENSOR, OP LPF BOARD ASSEMBLY and lens components when performing maintenance etc., (1) Set the OP LPF to the OP BLOCK ASSEMBLY so that the especially with regard to surface contamination, attached OP side touches the OP BLOCK ASSEMBLY.
  • Page 15: Emergency Display

    2.6 EMERGENCY DISPLAY Example (in case of the error number E01): Whenever some abnormal signal is input to the mechacon CPU, an error number (E01, as an example) is displayed in the elec- tronic view finder. In every error status, such the message as UNIT IN REMOVE AND shown below alternately appear over and over.
  • Page 16 2.7.1 Operation procedure 2.7.2 Flow chart NOTE: 1. Set the Power Switch to turn on TO S When demonstration is performed, some of the following func- the "M". EXPOSURE AUTO M. W. B . AUTO tions that a model does not have are omitted. Press the MENU Wheel once.
  • Page 17: Take Out Cassette Tape

    2.8 TAKE OUT CASSETTE TAPE In the event that the set enters the emergency mode as it is (4) While holding down the cassette housing by hand, con- loaded with a cassette tape and the cassette tape cannot be nect the jumper wires to a battery to run the mechanism ejected with the EJECT button, manually, take it out of the set to the EJECT position four unloading.
  • Page 18: Service Note

    2.9 SERVICE NOTE Use the following chart to manage screws 1-18 (No.86721)
  • Page 19: Adjustment

    MENT WITH PERSONAL COMPUTER is setup and it ad- PUJ50431-2 PTU94002-2 justs using a service support system. Please contact to JVC Service for detail information. • OP BLOCK • EEP ROM (IC102 of MAIN board) • MONITOR In the event of malfunction with electrical circuits, trouble- shooting with the aid of proper test instruments most be Conn.
  • Page 20 1,2. Alignment tape 10.Light box assembly To be used for check and adjustment of interchangeability of To be used for adjustment of the camera system. For the us- the mechanism. age of the Light box assembly, refer to the Service Bulletin No. (Video: Color bar signal, Audio: Non-signal) YA-SB-10035.
  • Page 21: Mechanism Adjustment

    3.3 MECHANISM ADJUSTMENT 3.3.1 TAPE TRANSPORT ADJUSTMENT Mechanism adjustment is needed when DRUM ASSEMBLY or a BACK TENSION part of the tape transport system is replaced. To protect tapes 0.97x10 - 1.71x10 • from damage, first clean the tape transport system, next confirm PLAY TORQUE (10-17gf·cm) 1.47x10...
  • Page 22 NOTE: 3.3.4 A/C head height & azimuth To prevent the tape from damage, turn the guide rollers Remove the exterior parts attached to the UPPER CASE slowly. ASSEMBLY so that the screws around the A/C HEAD (7) By operating the tracking button (both in + and - directions) ASSEMBLY can be tighten or loosen.
  • Page 23 3.3.5 Phase of control head (X value) Note: Remove the exterior parts attached to the UPPER CASE ASSEMBLY so that the screws around the A/C HEAD ASSEMBLY can be tighten or loosen. (1) Connect the JIG CONNECTOR CABLE to CN25 on the MAIN BOARD ASSEMBLY.
  • Page 24: Electrical Adjustment

    3.4 ELECTRICAL ADJUSTMENT 3.4.1 ELECTRICAL ADJUSTMENT WITH PERSONAL COMPUTER • Electrical adjustment except for B/W VF ASSEMBLY is per- • Remove the COVER (JIG) to perform adjustment. formed by using PERSONAL COMPUTER. As for the cable NOTE: connection, see Fig. 3-4-1. Read README.TXT file to use the For the connection of the JIG CONNECTOR CABLE, refer to software for SERVICE SUPPORT SYSTEM properly.
  • Page 25 3.4.2 B/W VF ASSEMBLY (E. VF) ADJUSTMENT Referring to “SEC. 2 SPECIFIC SERVICE INSTRUCTIONS” and 3.4.2.1 Tilt connect the E. VF WIRE to CN12 of the MAIN BOARD Subject • Alignment tape ASSEMBLY. • Stairstep Mode • PB (LY20701) Equipment •...
  • Page 26 1-26 (No.86721)
  • Page 27 JVC SERVICE & ENGINEERING COMPANY OF AMERICA DIVISION OF JVC AMERICAS CORP. www.jvcservice.com(US Only) JVC CANADA INC. Head office : 21 Finchdene Square Scarborough, Ontario M1X 1A7 (416)293-1311 (No.86721) Printed in Japan 200302WPC...
  • Page 28 PARTS LIST SAFETY PRECAUTION Parts identified by the  symbol are critical for safety. Replace only with specified part numbers. 1. EXPLODED VIEW 1.1 PACKING AND ACCESSORY ASSEMBLY <M1> The instruction manual to be provided with this product will differ according to the destination. FINAL ASSEMBLY <M2>...
  • Page 29 1.2 FINAL ASSEMBLY <M2> BEWARE OF BOGUS PARTS Parts that do not meet specifications may cause trouble in regard to safety and performance. We recommend that genuine JVC parts be used. ELECTRONIC VIEWFINDER ASSEMBLY <M4> MAIN BOARD ASSEMBLY <01> 121B...
  • Page 30 145A 145B 145E MECHANISM 145D ASSEMBLY 145G <M3> 145C 145D 145F 145F 145D 145D RATING LABEL MONITOR MODEL 101E 101C 261B 101A 101D 261A 101G 101E MONITOR ASSEMBLY <M5> 103A 101G 101B SHOOTING MODEL 101D 101E 101A 101C 101E 104E 101H 104F...
  • Page 31 1.3 MECHANISM ASSEMBLY <M3> BEWARE OF BOGUS PARTS Parts that do not meet specifications may cause trouble in regard to safety and performance. We recommend that genuine JVC parts be used. 469A 469B 469B 439A 429A 406B 406A Classification Part No.
  • Page 32 1.4 ELECTRONIC VIEWFINDER ASSEMBLY <M4> E.VF BOARD ASSEMBLY <60> 357A SERIAL NO. LABEL...
  • Page 33 1.5 MONITOR ASSEMBLY (2.5 INCH) <M5> [A] 501A MONITOR BOARD ASSEMBLY <07> 502C 502B 502A...
  • Page 34 1.6 MONITOR ASSEMBLY (3.5 INCH) <M5> [B, C, D, E] 501A MONITOR BOARD ASSEMBLY <07> 502C 502D 502B 502A...
  • Page 35 MODEL MARK MODEL MARK GR-SXM250US GR-SXM755UC GR-SXM750UC GR-SXM755US GR-SXM750US 2. PARTS LIST PACKING AND ACCESSORY ASSY <M1>  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local LY32981-001A QYSLSF2070D SPECIAL SCREW 2mm x 7mm...
  • Page 36 MODEL MARK MODEL MARK GR-SXM250US GR-SXM755UC GR-SXM750UC GR-SXM755US GR-SXM750US  Symbol No. Part No. Part Name Description Local MONITOR ASSEMBLY (2.5 INCH) <M5>  Symbol No. Part No. Part Name Description Local LY30162-002A POLE BASE(T)ASSY LY42523-001A DRIVE LEVER ASSY LY44000-001A SLANT ARM ASSY ...
  • Page 37 MODEL MARK MODEL MARK GR-SXM250US GR-SXM755UC GR-SXM750UC GR-SXM755US GR-SXM750US MAIN BOARD ASSEMBLY <01>  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local Q2071 2SC4617/QR/-X TRANSISTOR Q2071 or 2SC4783/5-6/-X TRANSISTOR YB10400UC1-03 MAIN BOARD ASSY...
  • Page 38 MODEL MARK MODEL MARK GR-SXM250US GR-SXM755UC GR-SXM750UC GR-SXM755US GR-SXM750US  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local D103 1SS355-X SI DIODE C2023 NBP21CM-105X TA E CAPACITOR 1uF 16V M D104...
  • Page 39 MODEL MARK MODEL MARK GR-SXM250US GR-SXM755UC GR-SXM750UC GR-SXM755US GR-SXM750US  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local C4209 NCB31CK-104X C CAPACITOR 0.1uF 16V K C6203 NBE40JM-476X TA E CAPACITOR 47uF 6.3V M...
  • Page 40 MODEL MARK MODEL MARK GR-SXM250US GR-SXM755UC GR-SXM750UC GR-SXM755US GR-SXM750US  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local R143 NRSA63J-105X MG RESISTOR 1MΩ 1/16W J R2012 NRSA63J-101X MG RESISTOR 100Ω 1/16W J...
  • Page 41 MODEL MARK MODEL MARK GR-SXM250US GR-SXM755UC GR-SXM750UC GR-SXM755US GR-SXM750US  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local R4257 NRSA63J-822X MG RESISTOR 8.2kΩ 1/16W J R6708 NRS016J-121X MG RESISTOR 120Ω 1W J...
  • Page 42 MODEL MARK MODEL MARK GR-SXM250US GR-SXM755UC GR-SXM750UC GR-SXM755US GR-SXM750US  Symbol No. Part No. Part Name Description Local MONITOR BOARD ASSEMBLY <07>  Symbol No. Part No. Part Name Description Local L6101 NQL64EM-330X COIL 33uH M L6201 NQL64EM-470X COIL 47uH M...
  • Page 43 MODEL MARK MODEL MARK GR-SXM250US GR-SXM755UC GR-SXM750UC GR-SXM755US GR-SXM750US  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local R7602 NRSA63D-752X MG RESISTOR 7.5kΩ 1/16W D B,C,D,E R7017 NRSA02J-472X MG RESISTOR 4.7kΩ 1/10W J...
  • Page 44 40.5 mm Some accessories are not available in some areas. Viewfinder : Electronic viewfinder with 0.5" black/white CRT Please consult your nearest JVC dealer for details on accessories and White balance : Auto/Manual adjustment their availability.
  • Page 45: Charts And Diagrams

    CHARTS AND DIAGRAMS NOTES OF SCHEMATIC DIAGRAM 4) Indication on schematic diagram 6. Signal path Symbols CIRCUIT BOARD NOTES Voltage Indications for REC and PB mode on the sche- The arrows indicate the signal path as follows. 1. Foil and Component sides Safety precautions matic diagram are as shown below.
  • Page 46: Board Interconnections

    BOARD INTERCONNECTIONS NOTES : The number of patch cords are indicated by interconnected. LCD_MODULE E.VF(BW) CN7602 (Page 2-29,30) BL_GND (Page 2-28) (Page 2-31,32) CN7601 YTU94074-14 YTU93082G YTU94077-14 CN5301 YUJ40095A-3 YTU94074-22 YTU94077-22 CN25 CN16 CN12 CN22 CN15 VDDSC PBLK PBLK AD_0 AD_0 AD_1 AD_1...
  • Page 47: Cpu Schematic Diagram

    CPU SCHEMATIC DIAGRAM NOTES : For the destination of each signal and further line connections that are cut off from this diagram, refer to "BOARD INTERCONNECTIONS". When ordering parts, be sure to order according to the Part Number indicated in the Parts List. 0 1 MAIN(CPU) UNREG R104...
  • Page 48: M.mda Schematic Diagram

    M.MDA SCHEMATIC DIAGRAM NOTES : For the destination of each signal and further line connections that are cut off from this diagram, refer to "BOARD INTERCONNECTIONS". When ordering parts, be sure to order according to the Part Number indicated in the Parts List. 0 1 MAIN(M.MDA) IC1602 TA75S393F-X...
  • Page 49: Asp Schematic Diagram

    ASP SCHEMATIC DIAGRAM NOTES : For the destination of each signal and further line connections that are cut off from this diagram, refer to "BOARD INTERCONNECTIONS". When ordering parts, be sure to order according to the Part Number indicated in the Parts List. 0 1 MAIN(ASP) CN25 V_OVL...
  • Page 50: Dsp Schematic Diagram

    DSP SCHEMATIC DIAGRAM NOTES : For the destination of each signal and further line connections that are cut off from this diagram, refer to "BOARD INTERCONNECTIONS". When ordering parts, be sure to order according to the Part Number indicated in the Parts List. DAC5 0 1 MAIN(DSP) BWYGAIN...
  • Page 51: F/Z/I/Mda Schematic Diagram

    F/Z/I/MDA SCHEMATIC DIAGRAM NOTES : For the destination of each signal and further line connections that are cut off from this diagram, refer to "BOARD INTERCONNECTIONS". When ordering parts, be sure to order according to the Part Number indicated in the Parts List. 0 1 MAIN(F/Z/I/MDA) IRIS_O/C TO OP BLOCK...
  • Page 52: Out Schematic Diagram

    V OUT SCHEMATIC DIAGRAM NOTES : For the destination of each signal and further line connections that are cut off from this diagram, refer to "BOARD INTERCONNECTIONS". When ordering parts, be sure to order according to the Part Number indicated in the Parts List. 0 1 MAIN(V OUT) L4701 TO REG...
  • Page 53: Tg/Cds Schematic Diagram

    TG/CDS SCHEMATIC DIAGRAM NOTES : For the destination of each signal and further line connections that are cut off from this diagram, refer to "BOARD INTERCONNECTIONS". When ordering parts, be sure to order according to the Part Number indicated in the Parts List. L5205 0 1 MAIN(TG/CDS) NQR0129-002X...
  • Page 54: Reg Schematic Diagram

    REG SCHEMATIC DIAGRAM NOTES : For the destination of each signal and further line connections that are cut off from this diagram, refer to "BOARD INTERCONNECTIONS". When ordering parts, be sure to order according to the Part Number indicated in the Parts List. 0 1 MAIN(REG) CN28 ADP_H...
  • Page 55: Lcd Schematic Diagram

    LCD SCHEMATIC DIAGRAM NOTES : For the destination of each signal and further line connections that are cut off from this diagram, refer to "BOARD INTERCONNECTIONS". When ordering parts, be sure to order according to the Part Number indicated in the Parts List. 0 1 MAIN(LCD) CN16 OPEN_SW...
  • Page 56: Bw/Vf Schematic Diagram

    BW/VF SCHEMATIC DIAGRAM NOTES : For the destination of each signal and further line connections that are cut off from this diagram, refer to "BOARD INTERCONNECTIONS". When ordering parts, be sure to order according to the Part Number indicated in the Parts List. 0 1 MAIN(BW/VF) (NC) BWBLEVEL...
  • Page 57: Jack Schematic Diagram

    JACK SCHEMATIC DIAGRAM NOTES : For the destination of each signal and further line connections that are cut off from this diagram, refer to "BOARD INTERCONNECTIONS". When ordering parts, be sure to order according to the Part Number indicated in the Parts List. CN9031 0 1 MAIN(JACK) R9402...
  • Page 58: Speaker Schematic Diagram

    SPEAKER SCHEMATIC DIAGRAM CCD SCHEMATIC DIAGRAM NOTES : For the destination of each signal and further line connections that are cut off from NOTES : For the destination of each signal and further line connections that are cut off from this diagram, refer to "BOARD INTERCONNECTIONS".
  • Page 59: Monitor Schematic Diagram

    MONITOR SCHEMATIC DIAGRAM NOTES : For the destination of each signal and further line connections that are cut off from this diagram, refer to "BOARD INTERCONNECTIONS". When ordering parts, be sure to order according to the Part Number indicated in the Parts List. 0 7 MONITOR J7501 NCB21EK-273X...
  • Page 60: Vf Chematic Diagram

    E. VF SCHEMATIC DIAGRAM NOTES : For the destination of each signal and further line connections that are cut off from this diagram, refer to "BOARD INTERCONNECTIONS". When ordering parts, be sure to order according to the Part Number indicated in the Parts List. 6 0 E.
  • Page 61: Top Ope Unit, Zoom Unit, Rear Unit And Sensor Schematic Diagrams

    TOP OPE UNIT, ZOOM UNIT, REAR UNIT AND SENSOR SCHEMATIC DIAGRAMS NOTES : For the destination of each signal and further line connections that are cut off from this diagram, refer to "BOARD INTERCONNECTIONS". The schematic diagram is only for reference. Avoid replacing individual parts. TOP OPE UNIT Replace the entire unit only.
  • Page 62: Main Circuit Board

    MAIN CIRCUIT BOARD CAUTION: ATTENTION: FOR CONTINUED PROTECTION AGAINST POUR UNE PROTECTION PERMANENTE FIRE HAZARD , REPLACE ONLY WITH SAME CONTRE LES RISQUE D'INCENDE , TYPE AND RATED FUSE ( S ) . REMPLACER LES FUSIBLES PAR UN AUTRE DE MEME TYPE ET DE MEME TENSION. <01>MAIN YB10400-01-03 FOIL SIDE (B)
  • Page 63 COMPONENT PARTS LOCATION GUIDE <MAIN> YB10400-01-03 (1/2) REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO CAPACITOR C2023 B C 1E C4049 B C 4D C6005 B C 2B C9315 B C 4A IC4001-...
  • Page 64 COMPONENT PARTS LOCATION GUIDE <MAIN> YB10400-01-03 (2/2) REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF. R6007 A C 1C R7009 A C 2E TL1617 B C 1F R6008 B C 2C R7010...
  • Page 65: Main Circuit Board

    MAIN CIRCUIT BOARD CAUTION: ATTENTION: FOR CONTINUED PROTECTION AGAINST POUR UNE PROTECTION PERMANENTE FIRE HAZARD , REPLACE ONLY WITH SAME CONTRE LES RISQUE D'INCENDE , TYPE AND RATED FUSE ( S ) . REMPLACER LES FUSIBLES PAR UN AUTRE DE MEME TYPE ET DE MEME TENSION. <01>MAIN YB10400-01-03 COMPONENT SIDE (A)
  • Page 66: Monitor Circuit Board

    MONITOR CIRCUIT BOARD CAUTION: ATTENTION: FOR CONTINUED PROTECTION AGAINST POUR UNE PROTECTION PERMANENTE FIRE HAZARD ,REPLACE ONLY WITH SAME CONTRE LES RISQUE D'INCENDE, TYPE AND RATED FUSE(S). REMPLACER LES FUSIBLES PAR UN AUTRE DE MEME TYPE ET DE MEME TENSION. <07>MONITOR YB20935 FOIL SIDE (B) COMPONENT PARTS LOCATION GUIDE...
  • Page 67 MONITOR CIRCUIT BOARD CAUTION: ATTENTION: FOR CONTINUED PROTECTION AGAINST POUR UNE PROTECTION PERMANENTE FIRE HAZARD ,REPLACE ONLY WITH SAME CONTRE LES RISQUE D'INCENDE, TYPE AND RATED FUSE(S). REMPLACER LES FUSIBLES PAR UN AUTRE DE MEME TYPE ET DE MEME TENSION. <07>MONITOR YB20936 FOIL SIDE (B) COMPONENT PARTS LOCATION GUIDE...
  • Page 68: Ccd Circuit Board

    CCD CIRCUIT BOARD WAVEFORMS — ASP — <02>CCD YB10400-01-03 IC3501-19 IC3501-20 IC3501-21 IC3501-25 FOIL SIDE (B) COMPONENT SIDE (A) REC 0.11 Vp-p REC 0.35 Vp-p 24 mVp-p 0.26 Vp-p 2 mV/10 µsec/DIV 10 mV/10 µsec/DIV 1 mV/5 msec/DIV 10 mV/5 msec/DIV —...
  • Page 69: Voltage Charts

    VOLTAGE CHARTS <CPU> <M.MDA> <ASP> <DSP> <F/Z/I/MDA> <V_OUT> <TG/CDS> <REG> MODE MODE MODE MODE MODE MODE MODE MODE MODE MODE MODE MODE MODE MODE MODE MODE PLAY PLAY PLAY PLAY PLAY PLAY PLAY PLAY PLAY PLAY PLAY PLAY PLAY PLAY PLAY PIN NO.
  • Page 70: Power System Block Diagram

    POWER SYSTEM BLOCK DIAGRAM REAR UNIT MAIN REG SECTION M. MDA SECTION DRM_PWR Q6401 L6002 F6008 UNREG DRM_PWR DRUM POWER L6001 CAP_PWR F6001 CN28 DRM_CTL BATT_+ CAP_PWR BATT_+ IC6001-6,39PIN Q6501 M_UNREG REG_3.2V ADP_DC POWER CAPSTAN ADP_DC F6002 M_UNREG ADP_H MOTOR ADP_H CAP_CTL CAPMR_BS...
  • Page 71: Cpu/Mda System Block Diagram

    CPU/M.MDA SYSTEM BLOCK DIAGRAM MAIN (CPU) (M. MDA) IC101(CPU) IC1601 DRUM ROTOR POSI POSITION CENTER IC103 RTC CS (RTC) AL SI START UP TIMMING SWITCHING DRUM CLK CONTROL CONTROL SCLK AL CLK D COIL U OSCIN D COIL U FORWARD DRUM ON C1617 C1619...
  • Page 72 CAMERA AND Y/C SYSTEM BLOCK DIAGRAM (1/2) 0 2 CCD MAIN V_PB_C IC5201 (TG/CDS) IC4001(DSP) (DSP) (CDS/AGC/AD/TG) IC5301 Q5301 CN5301 CN22 CCD_OUT CDSIN γ BLKSH PROCESS OP BLOCK CONV CLAMP γ T. G SEPA DSP CONTROL BLKFB (3LINE) OFFSET CDS_CLK INTER FACE SERIAL INTERFACE ADCLK...
  • Page 73 CAMERA AND Y/C SYSTEM BLOCK DIAGRAM (2/2) JIG_CONN. CN25 J504 A/V OUT V_PB_C IC4001(DSP) J505 S OUT IC4701 DA_R (V OUT) ∗ DA_B IC4702 Y/C MIX TO LCD/CVF &6dB AMP (V OUT) Q3502 IC3501 CH2_S DA_G (ASP) PB AMP TO BW/CVF CH2_F BWY0 BWYOUT...
  • Page 74: Monitor System Block Diagram

    CVF_R BULE BUF&SW Q7005 CVF_B CVF_B HCK1 BUF&SW REG+12V HCK2 REG+12V REG_3.2V REG_3.2V MODULE HDCVF HDCVF FROM/TO VDCVF VDCVF HRP2 HRP2 CVF_CS CVD_CS CVF_SCK3 FROM BW/CVF CVF_SCK3 CVF_SO3 CVF_SO3 MAIN FROM CPU BWYGAIN FROM DSP BWYGAIN (WPC)-M3C623,M3C643 GR-SXM250US,GR-SXM750UC,GR-SXM750US,GR-SXM755UC,GR-SXM755US 2-57 2-58...
  • Page 75 JVC SERVICE & ENGINEERING COMPANY OF AMERICA DIVISION OF JVC AMERICAS CORP. www.jvcservice.com(US Only) JVC CANADA INC. Head office : 21 Finchdene Square Scarborough, Ontario M1X 1A7 (416)293-1311 (No.86721) Printed in Japan 200302WPC...

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Gr-sxm750ucGr-sxm750usGr-sxm755ucGr-sxm755us

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