When servicing this product, under no circumstances should the original design be modified or altered without permission from JVC. All components should be replaced only with types identical to those in the original circuit and their physical location, wiring and lead dress must conform to original layout upon completion of repairs.
SERVICING PRECAUTIONS CAUTION: Before servicing the DVD covered by this service Electrostatically Sensitive (ES) Devices data and its supplements and addends, read and follow the Some semiconductor (solid state) devices can be damaged SAFETY PRECAUTIONS. NOTE: if unforeseen circumstances easily by static electricity. Such components commonly are create conflict between the following servicing precautions called Electrostatically Sensitive (ES) Devices.
SERVICE INFORMATION FOR EEPROM POWER ON DETECT NEW EEPROM DVD LOGO Status (NO Disk status) (OPTION EDIT SCREEN) MODEL: XV-N350B/XV-N352S NAME Remotecontrol OPT 1 Pause key-->1-->4-->7-->2 in order. OPT 2 OPT 3 OPT 4 OPT 5 OPT 6 Press number 0~8, Press charater...
SPECIFICATIONS • GENERAL Power requirements : AC 200 ~ 240V, 50/60Hz Power consumption : Dimensions (Approx.) : 430 x 35 x 202mm (17 x 1.4 x 7.9inches) (W x H x D) without foot Net Weight (Approx.) : 1.6kg (3.5lbs) Operating temperature : 5°C to 35°C (41°F to 95°F) Operating humidity :...
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SECTION 2 CABINET & MAIN CHASSIS CONTENTS EXPLODED VIEWS .............................2-2 1. CABINET AND MAIN FRAME SECTION ....................2-2 2. DECK MECHANISM SECTION (DP-11) ....................2-3 3. PACKING ACCESSORY SECTION......................2-4...
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SECTION 3 ELECTRICAL CONTENTS ELECTRICAL TROUBLESHOOTING GUIDE ..................3-2 1. POWER CHECK FLOW ..........................3-2 2. SYSTEM OPERATION FLOW.........................3-3 3. SYSTEM TEST FLOW..........................3-4 DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING .........3-10 1. SYSTEM 27MHZ CLOCK, RESET, FLASH R/W SIGNAL ..............3-10 2. SDRAM CLOCK.............................3-12 3.
ELECTRICAL TROUBLESHOOTING GUIDE 1. POWER CHECK FLOW No 5V No 3.3VA. Is 3.3VA Is 3.3VA section working? section working? Is 3.3V Is 5.6V present at present at emitter No 3.3VA collector of Q126? of Q121? Replace Q126. Check FR101 Replace Q121. Is there a DC voltage at Check D105/D106/D107/ cathode of D105 or D107?
ELECTRICAL TROUBLESHOOTING GUIDE 2. SYSTEM OPERATION FLOW Power on 1. 8032 initializes SERVO,DSP & RISC registers 2. Write RISC code to SDRAM 3. Reset RISC Show LOGO Tray closed ? Tray close to closed position SLED at inner side ? SLED moves to inner position 1.
ELECTRICAL TROUBLESHOOTING GUIDE 3. SYSTEM TEST FLOW TEST Check the AC Replace power PCBA or AC transformer. Voltage Power PCBA (110V or 220V) Switch on the power PCBA Is the DC voltage outputs OK? Repair or Replace power PCBA (5V, 3.3V, 12V, 5.6V MOTOR) Make sure the main PCBA don't short on VCCs and switch it on.
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ELECTRICAL TROUBLESHOOTING GUIDE RESET or power on. Check connection lines Flash between FLASH & ZR966 memory operates Show LOGO? and the FLASH access time properly? whether is suitable or not. Check connection lines SDRAM between SDRAM & ZR966 works properly? and the SDRAM is damaged.
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ELECTRICAL TROUBLESHOOTING GUIDE Does Motor Check the connection line the SLED move Driver DRVSB Pin to inner side when it is of DRVSB signal. is high? at outter position? Is sled_s Check the related DC Level higher than circuit of Sled_s. 1.4V? Check the amp circuit on SL+ and...
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ELECTRICAL TROUBLESHOOTING GUIDE Check the laser power circuit Laser DVD_LD, on ZR966 and connecting to turns on when reading CD_LD output properly? power transistor. disc? Collector Check the related circuit on voltage of power transistor laser power transistor is OK? Check cable connection between transistor ouput and pick-up head.
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ELECTRICAL TROUBLESHOOTING GUIDE Check connections between Proper signals on Focus on OK? ZR966 and pick-up head. A,B,C,D of ZR966 Check the focus_s connection Check focus_s on ZR966 and motor driver. signal on ZR966 Check the focus control F+ & F- output amp circuit on motor driver.
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ELECTRICAL TROUBLESHOOTING GUIDE Normal Audio Check connection between Audio output when disc DAC received correct ZR966 & Audio DAC. playback? data stream? Check the related Normal Audio circuit of Audio DAC. DAC out? Check Audio filter, amplify, mute circuit. Commu- Normal nications between Check communication...
DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING 1. SYSTEM 27MHz CLOCK, RESET, FLASH R/W SIGNAL 1) ZR966 main clock is at 27MHz (X601) FIG 1-1 2) ZR966 reset is active high. 3.3VA PWR_CTL RESET FIG 1-2 3-10...
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3) RS232 waveform during procedure (Downloading) FIG 1-3 4) Flash R/W enable signal during download (Downloading) IC602 FIG 1-4 3-11...
4. SLED CONTROL RELATED SIGNAL (NO DISC CONDITION) SLED_S(1.9V/1.4V/1.1V) DRVSB(3.3V) SLED+(4.2V/2.8V/1.2V) SLED-(4.2V/2.8V/1.5V) FIG 4-1 5. LENS CONTROL RELATED SIGNAL (NO DISC CONDITION) FOCUS_S(1.5V/1.4V/1.3V) FACT+(3.2V/2.7V/2.2V) FACT-(3.2V/2.7V/2.2V) FIG 5-1 3-13...
6. LASER POWER CONTROL RELATED SIGNAL (NO DISC CONDITION) CN201 MDI1(0V/180mV) CD_LD(3.3V//2.3V) DVD_LD(3.3V/2.3V) FIG 6-1 7. SPINDLE CONTROL WAVEFORM (NO DISC CONDITION) SPINDLE_S(1.4V/1.8V) SP-(3.6V/2.4V) SP+(3.6V/4.8V) FIG 7-1 3-14...
BE MODIFIED OR ALTERED WITHOUT PERMISSION CIRCUIT USED. THIS WAY, IMPLEMENTATION OF THE 2. Voltages are DC-measured with a digital voltmeter 1. POWER (SMPS) CIRCUIT DIAGRAM FROM THE JVC. ALL COMPONENTS SHOULD BE LATEST SAFETY PERFORMANCE during Play mode.
• CIRCUIT VOLTAGE CHART DC VOLTMETER MEASUREMENT METHOD No Disc Play No Disc Play No Disc Play No Disc Play No Disc Play No Disc Play 3.28 1.51 1.61 0.93 0.0002 0.0005 1.61 2.47 IC201 3.22 2.16 Playback 0.0001 0.001 1.59 1.91 0.0003...
DECK MECHANISM PARTS LOCATION • TOP VIEW (WITHOUT TRAY) Procedure Disass Fig- Parts Fixing Type embly Starting No. Main Base Clamp Assembly Disc 1, 2 Plate Clamp 1, 2, 3 Magnet Clamp 1, 2, 3, 4 Clamp Upper Tray Disc 1, 6 Base Assembly Sled 4 Screws,...
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DECK MECHANISM DISASSEMBLY FIG. 4-1 FIG. 4-2 1. MAIN BASE (FIG. 4-1) 2. TRAY DISC (FIG. 4-2) 1-1. Clamp Assembly Disc 1) Insert and push a Driver in the emergency eject hole(A) at the right side, or put the Driver on the 1) Place the Clamp Assembly Disc as Fig.
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FIG. 4-4 5. FRAME ASSEMBLY UP/DOWN (FIG. 4-4) 8. GEAR LOADING (FIG. 4-4) 9. GUIDE UP/DOWN (FIG. 4-4) Note Put the Base Main face down (Bottom Side) 1) Move the Guide Up/Down in direction of 1) Release the screw (S4) arrow(A) as Fig.(A) 2) Unlock the Locking Tab (L3) in direction of arrow 2) Push the Locking Tab(L5) down and then lift up...