JVC HR-XVC25US Service Manual
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JVC HR-XVC25US Service Manual

Dvd/cd player hi-fi stereo video cassette recorder
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SERVICE MANUAL
DVD/CD PLAYER Hi-Fi STEREO VIDEO CASSETTE RECORDER
SPECIFICATIONS
GENERAL
Power supply:
AC 120V 60Hz
Power consumption:
Operation: 18W
Stand by: 2W
Weight:
7.9lbs (3.6 kg)
Dimensions:
Width : 16-15/16 inches (430 mm)
Height : 3-7/8 inches (99 mm)
Depth : 9-13/16 inches (249 mm)
Inputs/Outputs:
Video:
In: 1Vp-p/75 ohm
Out: 1Vp-p/75 ohm
In: – 8 dBm/50k ohm
Audio:
Out: – 8 dBm/1k ohm
Antenna:
UHF/VHF IN/OUT: 75 ohm coaxial
Hi-Fi Frequency Response:
20Hz to 20,000Hz
Hi-Fi Dynamic Range:
More than 90dB
VCR section
Video Head:
4 Rotary Heads
Audio Track:
Hi-Fi Sound - 2 Tracks / MONO Sound - 1 Track
Tuner:
181 Channel Freq. Synthesized
VHF
UHF
CATV
RF Channel Output:
Channel 3 or 4, Switchable
F.FWD/REW Time:
Approx. 1 minute 48 seconds (with T-120 Cassette Tape) (at+25°C)
HR-XVC25U
HR-XVC25U
(The specifications shown pertain specifically to the model HR-XVC25US.)
2-13
14-69
14-36 (A)-(W)
37-59 (AA)-(WW)
60-85 (AAA)-(ZZZ)
86-94 (86)-(94)
95-99 (A-5)-(A-1)
100-125 (100)-(125)
01 (5A)
,
S
C
DVD section
Signal system:
NTSC
Applicable disc:
DVD (12cm, 8cm), CD (12cm, 8cm)
Audio characteristics:
DVD: 4Hz - 22kHz
Frequency response:
CD: 4Hz - 20kHz
S/N Ratio:
90dB
Harmonic distortion:
0.02%
Wow and flutter:
Less than 0.01% Wrms
Dynamic range:
More than 90dB
Output:
Video :
Audio :
Digital Audio : 0.5Vp-p 75 ohm
Pickup:
CD :
Wavelength: 775 - 805 nm
Maximum output power: 0.5 mW
DVD : Wavelength: 640 - 660 nm
Maximum output power: 1.0 mW
ACCESSORIES:
Remote control x 1
Batteries (2 x AA)
75 ohm Coaxial Cable x 1
AUDIO/VIDEO Cable x 1
(RCA) 1 Vp-p/75 ohm
(RCA) – 8 dBm/1k ohm

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Summary of Contents for JVC HR-XVC25US

  • Page 1 SERVICE MANUAL DVD/CD PLAYER Hi-Fi STEREO VIDEO CASSETTE RECORDER HR-XVC25U HR-XVC25U SPECIFICATIONS (The specifications shown pertain specifically to the model HR-XVC25US.) GENERAL DVD section Power supply: AC 120V 60Hz Signal system: NTSC Power consumption: Operation: 18W Applicable disc: DVD (12cm, 8cm), CD (12cm, 8cm)

  • Page 2: Table Of Contents

    SERVICE MODE LIST .............. 1-15 REFERENCE WHEN “N” IS ALWAYS BEING DISPLAYED ON THE TV MONITOR . 1-15 GENERAL SPECIFICATIONS[HR-XVC25US] ......4-1 PARENTAL CONTROL - RATING LEVEL 4-DIGIT PASSWORD CANNCELLATION . 1-16 WHEN REPLACING EEPROM(MEMORY) IC ......1-16 PREVENTIVE CHECKS AND SERVICE INTERVALS ..... 1-17 CONFIRMATION OF HOURS USED ........

  • Page 3: Important Safety Precautions

    Important Safety Precautions Prior to shipment from the factory, JVC products are strictly inspected to conform with the recognized product safety and electrical codes of the countries in which they are to be sold. However, in order to maintain such compliance, it is equally important to implement the following precautions when a set is being serviced.

  • Page 4: Safety Check After Servicing

    Safety Check after Servicing Examine the area surrounding the repaired location for damage or deterioration. Observe that screws, parts and wires have been returned to original positions, Afterwards, perform the following tests and confirm the specified values in order to verify compli- ance with safety standards.

  • Page 5: Disassembly Instructions

    DISASSEMBLY INSTRUCTIONS 1-3: DVD DECK (Refer to Fig. 1-3) REMOVAL OF MECHANICAL PARTS AND P.C. BOARDS Make the short circuit on the position as shown Fig. 1-3 using a soldering. If you remove the DVD Deck with no 1-1: TOP CABINET AND FRONT CABINET soldering, the Laser may be damaged.

  • Page 6: Dvd Pcb

    DISASSEMBLY INSTRUCTIONS 1-4: DVD PCB (Refer to Fig. 1-4) 1-6: VCR PCB (Refer to Fig. 1-6) Remove the 3 screws 1. Remove the screw 1. Remove the 4 screws 2. Remove the screw 2. Remove the screw 3. Disconnect the following connectors: (CP4002 and CP8102).

  • Page 7: Removal Of Vcr Deck Parts

    DISASSEMBLY INSTRUCTIONS NOTE 2. REMOVAL OF VCR DECK PARTS In case of the Locker R installation, check if the one 2-1: TOP BRACKET (Refer to Fig. 2-1) position of Fig. 2-3-B are correctly locked. Extend the 2 supports 1. When you install the Cassette Side R, be sure to move Slide the 2 supports 2 and remove the Top Bracket.

  • Page 8: Loading Motor / Worm

    DISASSEMBLY INSTRUCTIONS 2-6: LOADING MOTOR/WORM (Refer to Fig. 2-6-A) 2-7: TENSION ASS’Y (Refer to Fig. 2-7-B) Remove the screw 1. Turn the Pinch Roller Cam clockwise so that the Tension Remove the Loading Motor. Holder hook is set to the position of Fig. 2-7-A to move Remove the Worm.

  • Page 9: T Brake Arm / T Brake Band

    DISASSEMBLY INSTRUCTIONS NOTE [OK] Tension Connect Take care not to damage the gears of the S Reel and T Reel. Tension Band The Polyslider Washer may be remained on the back of the reel. [NG] Tension Connect Tension Band Take care not to damage the shaft. Do not touch the section “A”...

  • Page 10: Cassette Opener / Pinch Roller Block / P5 Arm Ass'y

    DISASSEMBLY INSTRUCTIONS 2-10: CASSETTE OPENER/PINCH ROLLER BLOCK/P5 ARM ASS’Y (Refer to Fig. 2-10-A) Unlock the support 1 and remove the Cassette Opener. Remove the Pinch Roller Block and P5 Arm Ass’y. Cassette Opener Spring Position Fig. 2-11-B Pinch Roller Block 2-12: FE HEAD (RECORDER ONLY) (Refer to Fig.

  • Page 11: Loading Gear S/T Unit

    DISASSEMBLY INSTRUCTIONS 2-14: CAPSTAN DD UNIT (Refer to Fig. 2-14-A) 2-15: MAIN CAM/PINCH ROLLER CAM/JOINT GEAR (Refer to Fig. 2-15-A) Remove the Capstan Belt. Remove the 3 screws 1. Remove the E-Ring 1, then remove the Main Cam. Remove the E-Ring 2, then remove the Pinch Roller Remove the Capstan DD Unit.

  • Page 12: Clutch Ass'y / Ring Spring / Clutch Lever / Clutch Gear

    DISASSEMBLY INSTRUCTIONS NOTE 2-18: CASSETTE GUIDE POST/INCLINED BASE S/T UNIT/P4 CAP (Refer to Fig. 2-18-A) 1. When you install the Loading Arm S Unit, Loading Arm T Unit and Main Loading Gear, align each marker. (Refer Remove the P4 Cap. Unlock the support 1 and remove the Cassette Guide to Fig.

  • Page 13: Removal Of Dvd Deck Parts

    DISASSEMBLY INSTRUCTIONS 3. REMOVAL OF DVD DECK PARTS Main Chassis Ass’y NOTE 1. Do not disassemble the DVD DECK PARTS except listed Rack Loading parts here. Minute adjustments are needed if the disas- semble is done. If the repair is needed except listed parts, replace the DVD MECHA ASS’Y.

  • Page 14: Traverse Holder / Insulator(F)

    DISASSEMBLY INSTRUCTIONS NOTE Main Chassis Ass’y When installing the Clamper Magnet, install it with the green face up. When installing the wire of the Lever Switch, install it correctly as Fig. 3-4-B. When installing the Lever Switch, install it correctly as Traverse Holder Fig.

  • Page 15: Relay Pcb Ass'y

    DISASSEMBLY INSTRUCTIONS NOTE 3-9: GEAR (Refer to Fig. 3-9-A) Unlock the support 1. After the assembly of the Rack Feed, check if the Rack Feed 1/2 is moving smoothly. (Refer to Fig. 3-7-B) Remove the Middle Gear 1/2/3, Idler Gear and Feed Gear. In case of the Rack Feed Ass’y installation, install cor- rectly as Fig.

  • Page 16: Idler Arm

    DISASSEMBLY INSTRUCTIONS NOTE In case of the Idler Arm installation, install as the circled section of Fig. 3-10-B. In case of the Idler Arm Spring installation, install as the circled section of Fig. 3-10-C. In case of the Chassis Spring installation, install as the circled section of Fig.

  • Page 17: Key To Abbreviations

    KEY TO ABBREVIATIONS Audio/Control H.SW Head Switch Automatic Color Control Hertz Audio Erase Integrated Circuit Automatic Frequency Control Intermediate Frequency Automatic Fine Tuning Indicator AFT DET Automatic Fine Tuning Detect Inverter Automatic Gain Control Killer Amplifier Left Antenna Light Emitting Diode A.PB Audio Playback LIMIT AMP...
  • Page 18 KEY TO ABBREVIATIONS SYNC Synchronization SYNC SEP Sync Separator, Separation Transistor TRAC Tracking TRICK PB Trick Playback Test Point UNREG Unregulated Volt Voltage Controlled Oscillator Video Intermediate Frequency Vertical Pulse, Voltage Display V.PB Video Playback Variable Resistor V.REC Video Recording Visual Search Fast Forward Visual Search Rewind Voltage Super Source...

  • Page 19: Service Mode List

    If "N" is always being displayed on the TV monitor, can not control from provided remote controller since this product is other brand format. • How to return a JVC format. Turn off the power of the set and push the CHANNEL+ button and the REC button of the set simultaneously.

  • Page 20: When Replacing Eeprom(Memory) Ic

    PARENTAL CONTROL - RATING LEVEL (4 DIGIT PASSWORD CANCELLATION) If the stored 4 digit password in the Rating Level menu needs to be cancelled, please follow the steps below. Turn Unit ON. Press and hold the '7' key on the remote control unit. Simultaneously press and hold the 'STOP' key on the front panel.

  • Page 21: Preventive Checks And Service Intervals

    PREVENTIVE CHECKS AND SERVICE INTERVALS The following standard table depends on environmental conditions and usage. Parts replacing time does not mean the life span for individual parts. Also, long term storage or misuse may cause transformation and aging of rubber parts. The following list means standard hours, so the checking hours depends on the conditions.

  • Page 22: Servicing Fixtures And Tools

    SERVICING FIXTURES AND TOOLS (4 heads model) Torque Gauge Roller Driver X-JG153 X Value Adjustment VHS Alignment Tape PUJ48075-2 PTU94002-2 Screwdriver Torque Tape Short Jumper MECHANISM ADJUSTMENT PARTS LOCATION GUIDE Tension Connect Tension Arm Guide Roller Audio/Control Head X value adjustment driver hole P4 Post T Brake Spring T Reel...

  • Page 23: Mechanical Adjustments

    MECHANICAL ADJUSTMENTS TAPE REMOVAL METHOD AT NO POWER 1. CONFIRMATION AND ADJUSTMENT SUPPLY Read the following NOTES before starting work. Remove the Top Cabinet, Front Cabinet and DVD Block. • Place an object which weighs between 450g~500g on the (Refer to item 1 of the DISASSEMBLY INSTRUCTIONS.) Cassette Tape to keep it steady when you want to make Remove the screw 1 of the Deck Chassis and remove the the tape run without the Cassette Holder.

  • Page 24: Confirmation Of Reel Brake Torque

    MECHANICAL ADJUSTMENTS 1-4: CONFIRMATION OF REEL BRAKE TORQUE 2. CONFIRMATION AND ADJUSTMENT OF TAPE RUNNING MECHANISM (S Reel Brake) (Refer to Fig. 1-2-B) Once set to the Fast Forward mode then set to the Stop Tape Running Mechanism is adjusted precisely at the mode.

  • Page 25: Confirmation And Adjustment Of Audio/Control Head

    MECHANICAL ADJUSTMENTS 2-2: CONFIRMATION AND ADJUSTMENT OF AUDIO/ 2-3: TAPE RUNNING ADJUSTMENT CONTROL HEAD (X VALUE ADJUSTMENT) When the Tape Running Mechanism does not work well, Confirm and adjust the position of the Tension Post. adjust the following items. (Refer to item 1-1) Adjust the Guide Roller.

  • Page 26: Electrical Adjustments

    ELECTRICAL ADJUSTMENTS Read and perform this adjustment when repairing the circuits or replacing electrical parts or PCB assemblies. CH-2 1. BASIC ADJUSTMENT CAUTION When you exchange IC and Transistor for a heat sink, apply the silicon grease (YG6260M) on the contact section of the heat sink.

  • Page 27: Servo Timing Chart

    SERVO TIMING CHART VCR PCB IC3001 (OEC0138A) DPG 104 PIN DFG 104 PIN 24 Cycle CH 1 CH 2 H. SW. P 105 PIN V-SYNC (E-E) 111 PIN REC CTL (REC) 7 PIN V-SYNC (TRICK PB) 109 PIN • WAVEFORM CHANGES DEPENDED ON THE TAPE SPEED 1-23...

  • Page 28: Mechanism Timing Chart

    MECHANISM TIMING CHART Please see the list below for the operational timing and the mode sensor output of the main parts on each mechanism modes. MECHANISM MODE EJECT STBY UNLOAD STOP3 F.SLOW STOP2 FF/REW Mode Dealing Directions Revolutional Angle of 206.3 226.4 272.2...

  • Page 29: Ic Descriptions

    IC DESCRIPTIONS OEC0138A (IC3001) PORT PIN NAME DESCRIPRION SVSS SVSS Ground. CTL_REF CTL_REF Output terminal for CTL amp REF (1/2 SVCC) CTL-H(+) CTL-H(+) Input and output terminal of Control Head. CTL-H(-) CTL-H(-) Input terminal of Control Head. CTL_BIAS CTL_BIAS Output terminal for bias. CTL_FB CTL_FB Input terminal for CTL feedback...
  • Page 30 IC DESCRIPTIONS OEC0138A (IC3001) P13/IRQ3 VIDEO MUTE H OUT H for at AUTO_CLOCK in POWER OFF. P14/IRQ4 POWER ON L OUT For control the user power switch ON/OFF. P15/IRQ5 POWER ON-H OUT For control the user power switch ON/OFF. P16/IC REM_IN Receive the remote control signal.
  • Page 31 IC DESCRIPTIONS OEC0138A (IC3001) Ground. OSC2 OSC2 OUT Connect the main crystal(10MHz) Connect the capacitor FZTAT Write MODE. P34/PWM2 OUT not used. P33/PWM1 CAP_LIMIT OUT Switch the maximum output current of the Capstan Motor. P32/PWM0 TUNER AUDIO MUTE-H OUT Output low at tuner and output high at external input/play. P31/SV2 VCR-H OUT H for at PLAY in VCR MODE.

  • Page 32: Troubleshooting Guide

    TROUBLESHOOTING GUIDE (VCR SECTION) POWER DOES NOT TURN ON Is the voltage Check of T501 Does display light? linked to L506? and peripheral circuit. Check of V651 and peripheral circuit. Is the voltage at Check IC3001. pin 30 of IC 3001 Check of T501 and peripheral circuit.

  • Page 33: Troubleshooting Guide

    TROUBLESHOOTING GUIDE THE POWER SUPPLY CUT Inserting a casette and push play button. Does the power cut Check CAPSTAN DD UNIT after 3 seconds? and CYLINDER UNIT. Does the power cut Check Q3006,Q3008 after about 6 seconds? and CAPSTAN BELT. Check the POWER BLOCK.
  • Page 34 TROUBLESHOOTING GUIDE AUDIO SHAKES Is AUDIO HEAD Change AUDIO HEAD. scratched? At playback,is input about Change CAPSTAN DD UNIT. 4.5Vp-p of a rectangular wave at pin 9 of IC3001? At playback,is pin 32 of Check IC3001. CP3001 3.5V? Check AUDIO BLOCK. 1-30...
  • Page 35 TROUBLESHOOTING GUIDE The CASSETTE TAPE CAN NOT BE INSERTED Does WORM GEAR of Check WORM GEAR cassette loading block of cassette loading block. move? When a CASSETTE can Check LED of DECK, not inserted, is pin 25 of PHOTO SENSOR. IC3001 5V ? When a CASSETTE is Change...
  • Page 36 TROUBLESHOOTING GUIDE CAN NOT FF/REW At FF/REW, does voltage Check of IC3001. at pin98 of IC3001 change? Check DECK MECHANISM. WHEN INSERTING A CASSETTE, IT EJECTS IMMEDIATELY Defective CASSETTE Does another CASSETTE or cassette loading block. insert? Does SW3001 and Correctly SW3001 REC LEVER and REC LEVER set.
  • Page 37 TROUBLESHOOTING GUIDE TAPE LOADING IS OK, BUT UNLOADS IMMEDIATELY Is the voltage Does CYLINDER at pin 2 of CP3001 Check POWER BLOCK. rotate? 12V ? At play, is the voltage at pin 12 of CP3001 2.6V ? Change CYLINDER unit. Is PG PULSE signal Is there HEAD SW inputted to pin 104...
  • Page 38 TROUBLESHOOTING GUIDE AT PLAY, THE PICTURE JITTERS VERTICAL MINUTELY Is FG wave of CP3001 Change at pin 11 5V ? CYLINDER MOTOR. Change IC3001. Is pin 12 of CP3001 2.6V ? Change CYLINDER MOTOR. AUTO TRACKING DOES NOT OPERATE Does the CTL pulse signal (about 2.5Vp-p) In auto tracking, is the Check CONTROL HEAD.
  • Page 39 TROUBLESHOOTING GUIDE WHEN PLAYBACK, FF OR REW MODE IS ACTIVE, UNIT STOPS IMMEDIATELY Refer to section "CAPSTAN Does CAPSTAN DD DD MOTOR NOT MOTOR rotate? ROTAING". Is there REEL SENSOR PULSE signal at pin 38 Check Q3001 and Q3002. and pin 39 of IC3001. Change IC3001.
  • Page 40 TROUBLESHOOTING GUIDE AT PLAY, PICTURE JITTERS HORIZONTALLY Does a noise on the picture appear? By adjusting the MANUAL TRACKING UP/DOWN Check P/B ENVELOPE. BUTTONS, will the line disappear? The height of GUIDE POST Is a height of GUIDE POST readjust. maximum? Is PG SHIFTER Adjust PG SHIFTER.
  • Page 41 TROUBLESHOOTING GUIDE AT PLAYBACK, THE PICTUER DOES NOT APPEAR Is the voltage of IC101 at Does E-E picture Check POWER BLOCK. pin 44, 45, 52 and 68 5V? appear? Is there video signal Change IC101. of IC101 at pin 26? Is there video signal Change IC8005.
  • Page 42 TROUBLESHOOTING GUIDE AT PLAYBACK AND RECORDING, CYLINDER MOTOR UNLOAD Is the voltage at pin 8 of Check IC502. CP3001 about DC12.6V? In playback,is at pin 12 of Check IC3001. CP3001 about DC2.6V? Check the DECK BLOCK. PLAYBACK PICTURE IS NOISY (EVEN AFTER CLEANING HEADS) Is noisy a wave of video Check CYLINDER.
  • Page 43 TROUBLESHOOTING GUIDE AT PLAYBACK, THE COLER DOES NOT APPEAR Is there color signal in Is there video signal at pin Change X'tal. video signal at pin 26 of 26 of IC101. IC101. Change IC101. NO COLOR DURING SELF RECORDING AND PLAYBACK Check TU301, J8003, Is there CHROMA signal at circuit around it.
  • Page 44 TROUBLESHOOTING GUIDE AT PLAY, AUDIO DOES NOT APPEAR Refer to section"E-E DOES At E-E, does audio appear? NOT APPEAR". Is the voltage at pin 6 of Check A/C HEAD. IC101 about 2.5V? Check circuit around at pin Is there audio signal at pin 10 of IC101.
  • Page 45 TROUBLESHOOTING GUIDE THE AUDIO CAN NOT RECORD In startinAg recording, Check POWER BLOCK and is there sine wave at Is bias level at L101 OK? voltage of base of Q103. pin 11 of IC101? YESA Check disconnection and short of L101. Check IC701 and Is there audio signal at the circuit from TUNER...
  • Page 46 TROUBLESHOOTING GUIDE THE CASSETTE INSERT, BUT THE TAPE DOES NOT MOVE Check LOADING MOTOR and Does the mode MODE SENSOR appear at display? RELATION DEPARTMENT. Does operate with Check IC3001. remote control? Check operation PCB. CAPSTAN DD MOTOR NOT ROTATING In playback,is there voltage at Check POWER BLOCK.
  • Page 47 TROUBLESHOOTING GUIDE RECORDING MECHANISM WORKS, BUT NO VIDEO RECORD FROM INPUT JACK OR TUNER Check cricuit of video signal from Is there video signal at VIDEO IN or pin 30, 32 of IC 101? TUNER to IC101. Is the voltage at pin 96 Is the BASE of Change IC3001.
  • Page 48 TROUBLESHOOTING GUIDE E-E DOES NOT APPEAR (THE PICTURE DOES NOT APPEAR FROM TUNER) Does normality AUDIO JACK Connection is done over again. CONNECT? Are there thevoltage Check POWER BLOCK. of +B(5V),TU(32V) of TU301? Check the picture. Is there video signal at Change TU301.
  • Page 49 TROUBLESHOOTING GUIDE E-E AUDIO (MONO) DOES NOT APPEAR Refer to section "E-E AUDIO Does E-E AUDIO (STEREO) DOES NOT APPEAR". (STEREO) appear? Is the voltage at pin 77 Check POWER BLOCK. of IC101 5V? Is the voltage at pin 95 Change IC3001.
  • Page 50 TROUBLESHOOTING GUIDE E-E AUDIO (STEREO) DOES NOT APPEAR Is the voltage at pin Check POWER BLOCK. 25,40,51 of IC701 5V? Is the voltage at pin Check POWER BLOCK. 58 of IC701 12V? Is there Audio signal at Check J8004, J8005. pin 10, 15 of IC701? Is there Audio signal at Change IC701.
  • Page 51 TROUBLESHOOTING GUIDE TUNER AUDIO (MONO) DOES NOT APPEAR Refer to section "E-E AUDIO Does E-E AUDIO (MONO) DOES NOT APPEAR". (MONO) appear? Check circuit around of TU301 Is there signal at pin at pin 14. 48 of IC701? Is there audio signal at Change IC701.
  • Page 52 TROUBLESHOOTING GUIDE TUNER AUDIO (STEREO) DOES NOT APPEAR Does TUNER AUDIO Refer to section "TUNER AUDIO (MONO) DOES NOT APPEAR". (MONO) appear? Does E-E AUDIO Refer to section "E-E AUDIO (STEREO) appear? (STEREO) DOES NOT APPEAR". At the time of channel Change IC701.
  • Page 53 TROUBLESHOOTING GUIDE PB AUDIO (Hi-Fi) DOES NOT APPEAR Does E-E AUDIO Refer to section "E-E AUDIO (STEREO) appear? (STEREO) DOES NOT APPEAR". Refer to section "AT PLAY, Does NORMAL PB AUDIO DOES NOT APPEAR". AUDIO appear? Is there audio signal at Check circuit of HEAD AMP pin 22, 24 of IC701? and CYLINDER UNIT.
  • Page 54 TROUBLESHOOTING GUIDE Hi-Fi AUDIO CAN NOT RECORD Refer to section "E-E AUDIO Does E-E AUDIO appear? (MONO) DOES NOT APPEAR". AT state of video recording, Check circuit arounf of J8004, is there audio signal at J8005 and TU301. pin 10 and 15 of IC701? Is there audio signal at Change IC701.

  • Page 55: (Dvd Section)

    TROUBLESHOOTING GUIDE (DVD SECTION) DECK DOES NOT ACCEPT OPEN/CLOSE Is the voltage at pin 3 and Check P.CON 9V line of 14 of IC2301 about DC9V ? POWER BLOCK. Is the lose connection Check CD2602 & CD2603 at CD2602 & CD2603 to connection to DECK.
  • Page 56 TROUBLESHOOTING GUIDE NO PLAYBACK PICTURE OF AV JACK Is there a oltage (beam current) at Check loader block. TP40 and TP42? Is there a signal at Check CP2601 pin 9,10,11 and 12 and peripheral circuit. of IC2601? Is there a signal at Check IC2601 pin 9,10,11 and 12 of and peripheral circuit.
  • Page 57 TROUBLESHOOTING GUIDE NO COLOR PLAYBACK PICTURE OF S-VIDEO JACK Check J8013 and peripheral Is there C signal at circuit. pin 162 of IC4001 ? REFER TO "NO PLAYBACK Is there Y signal at PICTURE OF S-VIDEO JACK". pin 161 of IC4001? Is there VIDEO signal REFER TO "NO PLAYBACK at pin 162 of IC4001?
  • Page 58 TROUBLESHOOTING GUIDE NO AUDIO ON PLAYBACK Is there AUDIO signal at Check IC8101 and pin 1 and 7 of IC8101 ? peripheral circuit. Is there waveform at pin Check IC7301 and 7 and 8 of IC7301? peripheral circuit. Change IC4001. 1-54...
  • Page 59 <Reference> GENERAL SPECIFICATIONS [HR-XVC25US] Outline of the product DVD VIDEO PLAYER & VHS Player / Recorder DVD System Color System NTSC Disc DVD, CD-DA, CD-R/RW, VIDEO CD Disc Diameter 120 mm , 80 mm Deck Disc Loading System Front Disc Loading...
  • Page 60 <Reference> GENERAL SPECIFICATIONS [HR-XVC25US] Regulation Safety UL / CSA Radiation FCC / IC Laser DHHS Temperature Operation 5oC - 40oC Storage -20oC - 60oC Operating Humidity Less than 80% RH Signal Video Signal Output Level 1 V p-p/75 ohm (DVD,VCR)
  • Page 61 <Reference> GENERAL SPECIFICATIONS [HR-XVC25US] G-10 On Screen Menu Display (DVD) Menu Type Character Language Menu Sub Title Audio Picture TV Screen Size OSD Display On/Off JPEG Interval Select Files Sound DRC (Dynamic Range Control) dts Decode Output (5.1ch/2ch) Surround On/Off...
  • Page 62 <Reference> GENERAL SPECIFICATIONS [HR-XVC25US] On Screen Menu Display(VCR) Menu Type Character Timer Rec Set Auto Repeat On/Off SAP On/Off CH Set-Up TV/CATV Auto CH Memory Add/Delete System Set Up Clock Set Yes (Calendar 12H) Language No Noise Back Ground Auto Clock...
  • Page 63 <Reference> GENERAL SPECIFICATIONS [HR-XVC25US] G-14 Remote Unit RC-GA Control Glow in Dark Remocon Format Custom Code 43,53,6F,7F Power Source Voltage (D.C) UM size x pcs UM-3 x 2 pcs Total Keys 50 Keys Keys Power DISPLAY/CALL UP/CH+ DOWN/CH- LEFT/ SET- / TRACKING- / VOL-...
  • Page 64 <Reference> GENERAL SPECIFICATIONS [HR-XVC25US] G-15 Features Auto Power Off (DVD) Parental Lock Video CD Playback MP3 Playback WMA Playback JPEG Playback Progressive Scan Out Digital Out Dolby Digital MPEG Down Mix Out (Dolby Digital) (DTS) Spatializer (N-2-2) Screen Saver Auto Stop...
  • Page 65 <Reference> GENERAL SPECIFICATIONS [HR-XVC25US] G-17 Interface Switch Front Power Play Eject (VCR) Stop Rec/OTR Open/Close (DVD) CH + CH - FF/ Search(>>) Rew/Search(<<) Still/Pause Shuttle (Search/REV/FWD) DVD/VCR Main Power SW Rear Attenuator S-Video/Component Video Selector RF Out (Slide SW) Main Power SW...
  • Page 66 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 Printed in Japan 0305 VP...

  • Page 67: Charts And Diagrams Interconnection Diagram

    SECTION 2 The Parts Number , value and rated voltage etc. in the Schematic Diagram are for references only. Note : When replacing the parts , refer to the Parts List. CHARTS AND DIAGRAMS INTERCONNECTION DIAGRAM OPERATION PCB FULL ERASE HEAD ASS’Y PCB270 VEBA07 COMMAND TRANSMITTER...

  • Page 68: Y/C/Audio/Ccd/Head Amp Schematic Diagram

    The Parts Number , value and rated voltage etc. in the Schematic Diagram are for references only. Note : When replacing the parts , refer to the Parts List. Y/C/AUDIO/CCD/HEAD AMP SCHEMATIC DIAGRAM (VCR PCB) BUFFER Q109 KTC3875S_Y_RTK R129 1.8K FROM/TO POWER P.CON+5V FROM/TO TUNER/JACK...
  • Page 69 The Parts Number , value and rated voltage etc. in the Schematic Diagram are for references only. Note : When replacing the parts , refer to the Parts List. SYSCON SCHEMATIC DIAGRAM (VCR PCB) TP3002 H.SW C3025 FROM/TO Y/C/AUDIO/CCD/H.AMP FROM/TO POWER 12P CH DUMMY_V.SYNC RX DRIVE...

  • Page 70: Tuner/Jack Schematic Diagram

    The Parts Number , value and rated voltage etc. in the Schematic Diagram are for references only. Note : When replacing the parts , refer to the Parts List. TUNER/JACK SCHEMATIC DIAGRAM (VCR PCB) RF MUTE SW Q301 KTC3875S_Y_RTK TU301 115-V-H015AR REAR OUT JACK J8001...

  • Page 71: Operation/Display Schematic Diagram

    The Parts Number , value and rated voltage etc. in the Schematic Diagram are for references only. Note : When replacing the parts , refer to the Parts List. OPERATION/DISPLAY SCHEMATIC DIAGRAM (VCR PCB) V651 ELF-4M6SDRSOWB SEG1 SW Q664 KRC103SRTK R674 FROM/TO SYSCON 1G SW...

  • Page 72: Hi-Fi/Demodulator Schematic Diagram

    The Parts Number , value and rated voltage etc. in the Schematic Diagram are for references only. Note : When replacing the parts , refer to the Parts List. Hi-Fi/DEMODULATOR SCHEMATIC DIAGRAM (VCR PCB) C744 0.1 F C743 R716 3.3K 0.22 FROM/TO TUNER/JACK FRONT_A_IN_R...

  • Page 73: Power Schematic Diagram

    The Parts Number , value and rated voltage etc. in the Schematic Diagram are for references only. Note : When replacing the parts , refer to the Parts List. POWER SCHEMATIC DIAGRAM (VCR PCB) FROM/TO Y/C/AUDIO/CCD/H.AMP P.CON+5V W870 D506 C516 W806 AT+12.6_V 1N4005-EIC...

  • Page 74: Operation/Led Schematic Diagram

    The Parts Number , value and rated voltage etc. in the Schematic Diagram are for references only. Note : When replacing the parts , refer to the Parts List. OPERATION/LED SCHEMATIC DIAGRAM (OPERATION PCB) DVD LED D685 R685 R686 R687 R688 R689 13K 1/4W...

  • Page 75: Mpeg/Micom Schematic Diagram

    The Parts Number , value and rated voltage etc. in the Schematic Diagram are for references only. Note : When replacing the parts , refer to the Parts List. MPEG/MICON SCHEMATIC DIAGRAM (DVD PCB) FROM/TO AUDIO/VIDEO CP4003 A2001WV2-9P PP¢“ DEL DAC_VIDEO_C VCC+3V DAC_VIDEO_B...

  • Page 76: Memory Schematic Diagram

    The Parts Number , value and rated voltage etc. in the Schematic Diagram are for references only. Note : When replacing the parts , refer to the Parts List. MEMORY SCHEMATIC DIAGRAM (DVD PCB) FLASH IC4007 SST39VF800A-70-4C-EK FROM/TO MPEG/MICON HA16 HA15 SD_A0 SD_A1...

  • Page 77: Rf Amp/Dsp Schematic Diagram

    The Parts Number , value and rated voltage etc. in the Schematic Diagram are for references only. Note : When replacing the parts , refer to the Parts List. RF AMP/DSP SCHEMATIC DIAGRAM (DVD PCB) FROM/TO MPEG/MICON SPDL_SENS TOUT_SW MOT_SPDL+ R2625 4.7K TIN_SW...

  • Page 78: Audio/Video Schematic Diaram

    The Parts Number , value and rated voltage etc. in the Schematic Diagram are for references only. Note : When replacing the parts , refer to the Parts List. AUDIO/VIDEO SCHEMATIC DIAGRAM (DVD PCB) C8146 C8144 6.3V FROM/TO MPEG/MICON 6.3V C8145 6.3V W865...

  • Page 79: Waveforms

    WAVEFORMS WAVEFORMS MPEG/MICON POWER 10ns 10µs 500µs 100mV 100mV 100mV 5µs 500µs 200ms 500mV 500mV 1.0V MEMORY 200ns 10µs 5µs 20mV 20mV 100mV 5µs 5.0V 500mV Y/C/AUDIO/CCD/HEAD AMP RF AMP/DSP SYSCON 10µs 200ns 10µs 100mV 20mV 500mV 2.0V 1.0V Hi-Fi/DEMODULATOR 10µs 200ns 10mV...

  • Page 80: Printed Circuit Board Vcr

    PRINTED CIRCUIT BOARDS COMPONENT PARTS LOCATION GUIDE < REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION CAUTION : CAPACITOR C739 D701 VCR (CHIP MOUNTED PARTS) FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, REPLACE ONLY WITH SAME TYPE AND RATED FUSE(S). C103 C740 D702 ATTENTION : C104 C741...

  • Page 81: Printed Circuit Board Dvd

    <VCR> VMC300A PRINTED CIRCUIT BOARDS REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCAT R122 R3019 VCR (INSERTED PARTS) R123 R3020 R124 R3022 SOLDER SIDE R126 R3025 R127 R3026 R129 R3027 R131 R3028 R132 R3029 R133 R3030 R136 R3031 V651 R137 R3032 R138 R3033 J8003 J8004...
  • Page 82 PRINTED CIRCUIT BOARDS DVD (TOP SIDE) W811 CP2602 CP2603 CP2601 IC4005 D2601 C2633 C2625 C2628 C2624 C2635 C2629 R2614 L8106 Q2601 C2603 Q2602 C2604 C2605 L8105 C2606 C2616 C2607 R2643 C2618 R2644 C2649 R2604 C2654 R8111 R2603 D8108 D8107 D8106 C2617 R2635 W861...

  • Page 83: Printed Circuit Board Operation

    PRINTED CIRCUIT BOARDS PRINTED CIRCUIT BOARDS OPERATION DVD (BOTTOM SIDE) SOLDER SIDE SW690 SW686 R690 R685 R686 D8103 SW689 SW685 R688 R687 Q8104 Q8105 SW687 SW688 R689 W869 W874 CP681 W872 R2651 B7302 2-33 2-34...

  • Page 84: Y/C/Audio/Ccd/Head Amp Block Diagram

    Y/C/AUDIO/CCD/HEAD AMP BLOCK DIAGRAM AUDIO SIGNAL(REC) X101 AUDIO SIGNAL (PB) 3.578545M Hz PLAYBACK COLOR SIGNAL PLAYBACK LUMINANCE SIGNAL RECORD COLOR SIGNAL RECORD LUMINANCE SIGNAL Q109 Q107 TUNER VIDEO SIGNAL BUFFER Y/C/AUDIO/CCD/HEAD AMP IC BUFFER IC101 LA71206M VX01 PULL Y/C_CS SERIAL DRIVER CLAMP Y/C_DATA...

  • Page 85: System Control Block Diagram

    SYSTEM CONTROL BLOCK DIAGRAM PLAYBACK COLOR SIGNAL PLAYBACK LUMINANCE SIGNAL RECORD COLOR SIGNAL V.REC_ST-H RECORD LUMINANCE SIGNAL SYSCON/TIMER/SERVO IC3001 OEC0138A AUDIO_MUTE-H IIC_CLK HIFI/ DVD_POWER_CTL DVD_POWER_CTL IIC_DATA DEMODULATOR VCR_POWER_ON-L POWER ON-L HIFI ENV 32 HIFI_ENV.DET POWER_FAIL POWER FAIL HIFI H.SW 106 HIFI_H.SW POWER ST SELECT 31...

  • Page 86: Operation/Display Block Diagram

    OPERATION/DISPLAY BLOCK DIAGRAM V651 ELF-4M6SDRSOWB/S423 14 15 13 12 11 10 8 Q651 5G SW 5G/CS/BS_LED Q652 SEG10 SW SEG10 Q653 SEG9 SW SEG9 Q654 4G SW 4G/T_SHT_LED Q655 SEG8 SW SEG8 Q656 SEG7 SW SEG7 Q657 SEG6 SW SEG6 Q658 SEG5 SW SEG5...
  • Page 87 HiFi/DEMODULATOR BLOCK DIAGRM HIFI AUDIO/H.AMP/DEM IC IC701 AN3663FBP DVD_A_OUT-R DVD_A_OUT-L FRONT_A_IN-R FRONT_A_IN-L INPUT SW AUDIO_OUT_R HF_COM OUTPUT TUNER/JACK AUDIO_OUT_L RF_CONV_A.OUT Y/C/AUDIO/CCD /HEAD AMP VCO-FO LOGIC SIF OUT FM LIM FROM_NORMAL_A TO_NORMAL_A NOISE BLOCK REDUCTION V. REC_ST-H HIFI_ENV. DET HIFI_H.SW SYSCON AUDIO_MUTE-H P.CON+5V IIC_CLK...

  • Page 88: Tuner/Jack Block Diagram

    TUNER/JACK BLOCK DIAGRAM FRONT AV JACK AUDIO R REAR OUT JACK VIDEO AUDIO L J8005 AUDIO SIGNAL(REC) J8001 J8003 J8004 AUDIO SIGNAL (PB) PLAYBACK COLOR SIGNAL PLAYBACK LUMINANCE SIGNAL RECORD COLOR SIGNAL RECORD LUMINANCE SIGNAL TUNER VIDEO SIGNAL VIDEO MUTE H Q8004 DIGITAL AUDIO SIGNAL (PB) SYSCON...

  • Page 89: Power Block Diagram

    POWER BLOCK DIAGRAM Q508 AT+12.6V SYSCON 3.3V CTL L501 T501 D505, D506 Q510 D502, D503 P.CON+12V AC IN P.CON+12V TUNER/JACK Q509 P.CON SW VCR POWER ON-L SYSCON Q511 3.3V OUT OPERATION/DISPLAY AT+5.2V Q507 Q503 3.3V CTL P.CON+5V P.CON+5V Q506 Q504 M-CON M-CON+5V AT+5V (M-CON)

  • Page 90: Dvd Block Diagram

    ASDATA0 DVD AUDIO AMCLK ABCLK Y/U/V OUT ALRCLK J8101 J8103 STEREO DAC DVD AUDIO L AUDIO AMP AUDIO MUTE IC7301 IC8101 Q8101~Q8105 DVD AUDIO R PCM1742 NJM4580M KE-2K DIGITAL SPDIF AUDIO DRIVER Q8107 OPTICAL OS8101 (VP)-D2SP11 2-47 2-48 HR-XVC25US, HR-XVC25UC...

  • Page 91: Parts List

    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. 3.1.1 PACKING AND ACCESSORY ASSEMBLY <M1> The instruction manual to be provided with this product will differ according to the destination.

  • Page 92: 3.1.2 Final Assembly

    3.1.2 FINAL ASSEMBLY <M2> PCB010 (VCR PCB ASS'Y) PCB130 (DVD PCB ASS'Y) RATING LABEL 101C 101M 101L 101K 101D 101J 101L 101K 101F 101G 101H 101I PCB270 101N (OPERATION PCB ASS'Y) 101E 101A 101N 101B...

  • Page 93: 3.1.3 Mechanism Assembly(Dvd)

    3.1.3 MECHANISM ASSEMBLY(DVD) <MN> CD2302 Do not replace the parts. Because, minute adjustments are needed if this condition is disassembled CD2001 further more. PCB640 If the repair is needed, replace the (SW PCB ASS'Y) DVD MECHA ASS'Y. M2002 PCB68A (RELAY PCB ASS'Y) CD2301 NOTE: Applying positions AA, AB and AC for the...

  • Page 94: 3.1.4 Mechanism Assembly(Vcr)

    3.1.4 MECHANISM ASSEMBLY(VCR) <M4> [ TOP VIEW ] CD1501 M2003 UN4001 H5002 H5001 CD1502 M101 NOTE: Applying positions AA, AB, AC, AD and AE for CLASS PART NO. MARK the grease are displayed for this section. GREASE G-555G Check if the correct grease is applied for each MG-33 position.
  • Page 95 [ BOTTOM VIEW ] M2001 CD1501 CD1502 NOTE: Applying positions AA, AB, AC, AD and AE for CLASS PART NO. MARK the grease are displayed for this section. GREASE G-555G Check if the correct grease is applied for each MG-33 position.

  • Page 96: Packing And Accessory Parts List

    PARTS LIST REF No. PART No. PART NAME, DESCRIPTION REF No. PART No. PART NAME, DESCRIPTION - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -...

  • Page 97: Vcr Board Assembly<03

    REF No. PART No. PART NAME, DESCRIPTION REF No. PART No. PART NAME, DESCRIPTION - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -...
  • Page 98 REF No. PART No. PART NAME, DESCRIPTION REF No. PART No. PART NAME, DESCRIPTION - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -...
  • Page 99 REF No. PART No. PART NAME, DESCRIPTION REF No. PART No. PART NAME, DESCRIPTION - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -...
  • Page 100 REF No. PART No. PART NAME, DESCRIPTION REF No. PART No. PART NAME, DESCRIPTION - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -...
  • Page 101 REF No. PART No. PART NAME, DESCRIPTION REF No. PART No. PART NAME, DESCRIPTION - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -...

  • Page 102: Operation Board Assembly<28

    REF No. PART No. PART NAME, DESCRIPTION REF No. PART No. PART NAME, DESCRIPTION - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -...
  • Page 103 REF No. PART No. PART NAME, DESCRIPTION REF No. PART No. PART NAME, DESCRIPTION - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -...
  • Page 104 REF No. PART No. PART NAME, DESCRIPTION REF No. PART No. PART NAME, DESCRIPTION - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -...
  • Page 105 B4002 X-024HC31022 CORE,BEADS B4003 X-024HC31022 CORE,BEADS B4004 X-024HC31022 CORE,BEADS B4005 X-024HC31022 CORE,BEADS B4006 X-024HC31022 CORE,BEADS B4007 X-024HC31022 CORE,BEADS B4008 X-024HC31022 CORE,BEADS B7301 X-024HC31022 CORE,BEADS B7302 X-024HC31022 CORE,BEADS B8101 X-024HC31022 CORE,BEADS B8102 X-024HC31022 CORE,BEADS B8103 X-024HC31022 CORE,BEADS (VP)-D2SP11 3-15 HR-XVC25US, HR-XVC25UC...

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