Jvc-THL-1-A-Service-Manual电路原理图.pdf

SERVICE MANUALCOPYRIGHT © 2007 Victor Company of Japan, LimitedNo.MB6232007/7DIGITAL MEDIA SYSTEMMB62320077SERVICE MANUALTH-L1A, TH-L1US, TH-L1UB, TH-L1UJ, TH-L1UG, TH-L1UNCOPYRIGHT © 2007 Victor Company of Japan, LimitedLead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)Lead free solder used in the board (material : Sn-Cu, melting point : 230 Centigrade)TABLE OF CONTENTS1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-42 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-53 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-54 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-145 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14AX-THL1SP-THL1WSP-THL1FSP-THL1FSP-THL1CSP-THL1SSP-THL1S1-2 (No.MB623)SPECIFICATIONCenter unit* Corresponding to Linear PCM Dolby Digital and DTS Digital Surround (with sampling frequency - 32 kHz 44.1 kHz 48 kHz)Output power Front/Surround 40 W per channel RMS at 3 at 1 kHz with 10% total harmonic distortion.Center 100 W RMS at 4 at 1 kHz with 10% total harmonic distortion.Subwoofer 100 W RMS at 4 at 30 Hz with 10% total harmonic distortion.Audio section Analog Input VIDEO 1 IN,VIDEO 2 IN,VIDEO 3500 mV/50 k Digital Input* VIDEO 1, VIDEO 3-21 dBm to -15 dBm (660 nm ± 30 nm)VIDEO 2 0.5 V(p-p)/75 Video section Video System NTSC/PALHorizontal Resolution 500 linesSignal-to-Noise Ratio 60 dBVideo output level Composite 1 V(p-p)/75 S-video-Y 1 V(p-p)/75 S-video-C NTSC 0.286 V(p-p)/75 PAL 0.3 V(p-p)/75 Component(Interlace/Progressive)Y 1 V(p-p)/75 PB/PR 0.7 V(p-p)/75 HDMI HDMI Input VIDEO 1 IN, VIDEO 2 INHDMI Output MONITOR OUTMax capability 1920 × 1080 at 60 Hz / Deep color 4:4:4 / color depth 24 bit.USB storage USB specification Compatible with USB 2.0 Full SpeedCompatible device Mass Storage ClassCompatible file system FAT16, FAT32Bus power supply 5 V/500 mASpeaker impedance Front and Surround 3 to 16 Center and Subwoofer 4 to 16 General Power Requirements For HongKong AC 220 V , 50 HzFor Australia AC 240 V , 50 HzFor other countries AC 110 V - 240 V , 50/60 HzPower supply to iPod 5 V/500 mAPower Consumption 50 W (at operation)1.5 W (in standby mode)Dimensions (W × H × D) 118 mm × 276 mm × 246 mmMass 2.9 kg(No.MB623)1-3Subwoofer (SP-THL1W)Front speakers (SP-THL1F)Center speaker (SP-THL1C)Surround speakers (SP-THL1S)Designs & specifications are subject to change without notice.Type 1-way Bass-Reflex Type (Magnetically-Shielded Type)Speaker 16 cm cone × 1Power Handling Capacity 100 WImpedance 4 Frequency Range 30 Hz to 1.5 kHzSound Pressure Level 84 dB/WmDimensions (W × H × D) 266 mm × 270 mm × 157 mmMass 2.9 kgType Full-Range Bass-Reflex Type (Magnetically-shielded Type)Speaker 6.5 cm cone × 1Power Handling Capacity 40 WImpedance 3 Frequency Range 90 Hz to 20 kHzSound Pressure Level 77 dB/WmDimensions (W × H × D) 100 mm × 104 mm × 105 mmMass 0.42 kg eachType Full-Range Bass-Reflex Type (Magnetically-shielded Type)Speaker 6.5 cm cone × 1Power Handling Capacity 100 WImpedance 4 Frequency Range 90 Hz to 20 kHzSound Pressure Level 77 dB/WmDimensions (W × H × D) 100 mm × 104 mm × 105 mmMass 0.42 kgType Full-Range Bass-Reflex TypeSpeaker 6.5 cm cone × 1Power Handling Capacity 40 WImpedance 3 Frequency Range 90 Hz to 20 kHzSound Pressure Level 76 dB/WmDimensions (W × H × D) 100 mm × 104 mm × 105 mmMass 0.5 kg each1-4 (No.MB623)SECTION 1PRECAUTION1.1 Safety Precautions(1) This design of this product contains special hardware andmany circuits and components specially for safety purpos-es. For continued protection, no changes should be madeto the original design unless authorized in writing by themanufacturer. Replacement parts must be identical tothose used in the original circuits. Services should be per-formed by qualified personnel only.(2) Alterations of the design or circuitry of the product shouldnot be made. Any design alterations of the product shouldnot be made. Any design alterations or additions will voidthe manufacturers warranty and will further relieve themanufacture of responsibility for personal injury or propertydamage resulting therefrom.(3) Many electrical and mechanical parts in the products havespecial safety-related characteristics. These characteris-tics are often not evident from visual inspection nor can theprotection afforded by them necessarily be obtained by us-ing replacement components rated for higher voltage, watt-age, etc. Replacement parts which have these specialsafety characteristics are identified in the Parts List of Ser-vice Manual. Electrical components having such featuresare identified by shading on the schematics and by ( ) onthe Parts List in the Service Manual. The use of a substitutereplacement which does not have the same safety charac-teristics as the recommended replacement parts shown inthe Parts List of Service Manual may create shock, fire, orother hazards.(4) The leads in the products are routed and dressed with ties,clamps, tubings, barriers and the like to be separated fromlive parts, high temperature parts, moving parts and/orsharp edges for the prevention of electric shock and firehazard. When service is required, the original lead routingand dress should be observed, and it should be confirmedthat they have been returned to normal, after reassem-bling.(5) Leakage shock hazard testingAfter reassembling the product, always perform an isola-tion check on the exposed metal parts of the product (an-tenna terminals, knobs, metal cabinet, screw heads,headphone jack, control shafts, etc.) to be sure the productis safe to operate without danger of electrical shock.Do notuse a line isolation transformer during this check. Plug the AC line cord directly into the AC outlet. Using a“Leakage Current Tester“, measure the leakage currentfrom each exposed metal parts of the cabinet, particular-ly any exposed metal part having a return path to thechassis, to a known good earth ground. Any leakage cur-rent must not exceed 0.5mA AC (r.m.s.). Alternate check methodPlug the AC line cord directly into the AC outlet. Use anAC voltmeter having, 1,000 per volt or more sensitivityin the following manner. Connect a 1,500 10W resistorparalleled by a 0.15µF AC-type capacitor between an ex-posed metal part and a known good earth ground.Measure the AC voltage across the resistor with the ACvoltmeter. Move the resistor connection to each exposed metalpart, particularly any exposed metal part having a returnpath to the chassis, and measure the AC voltage acrossthe resistor. Now, reverse the plug in the AC outlet andrepeat each measurement. Voltage measured any mustnot exceed 0.75 V AC (r.m.s.). This corresponds to 0.5mA AC (r.m.s.). 1.2 Warning(1) This equipment has been designed and manufactured tomeet international safety standards.(2) It is the legal responsibility of the repairer to ensure thatthese safety standards are maintained.(3) Repairs must be made in accordance with the relevantsafety standards.(4) It is essential that safety critical components are replacedby approved parts.(5) If mains voltage selector is provided, check setting for localvoltage.1.3 CautionBurrs formed during molding may be left over on some partsof the chassis. Therefore, pay attention to such burrs in the case of pre-forming repair of this system.1.4 Critical parts for safetyIn regard with component parts appearing on the silk-screenprinted side (parts side) of the PWB diagrams, the parts that areprinted over with black such as the resistor ( ), diode ( )and ICP ( ) or identified by the “ “ mark nearby are criticalfor safety. When replacing them, be sure to use the parts of thesame type and rating as specified by the manufacturer. (This regulation dose not Except the J and C version)Good earth groundPlace this probe on each exposedmetal part.AC VOLTMETER(Having 1000 ohms/volts,or more sensitivity)1500 10W0.15 F AC TYPE(No.MB623)1-5SECTION 2SPECIFIC SERVICE INSTRUCTIONSThis service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.SECTION 3DISASSEMBLY3.1 Main body3.1.1 Removing the SIDE PANEL (See Fig.1, 2)(1) Remove the nine screws A attaching the SIDE PANEL.(See Fig.1)(2) Remove the three screws B attaching the SIDE PANEL.(See Fig.2)Fig.1Fig.2AABBB1-6 (No.MB623)3.1.2 Removing the FRONT PANEL assembly (See Fig.3, 4)(1) Remove the two screws C attaching the both side ofFRONT PANEL assembly. (See Fig.3)(2) Disengage the six hooks a engaged both side of FRONTPANEL assembly. (See Fig.3)(3) Disconnect the card wire from MAIN BODY connected toconnector CN860 of the FL BOARD assembly. (See Fig.4)Fig.3Fig.4Chook a(both side)CN860(No.MB623)1-73.1.3 Removing the TOP CHASSIS (See Fig.5 to 8)(1) From the back side of main body, remove the two screwsD attaching the TOP CHASSIS. (See Fig.5)(2) From the top side of main body, remove the one screw Eattaching the TOP CHASSIS. (See Fig.6)(3) From the right side of main body, remove the four screwsF attaching the TOP CHASSIS. (See Fig.7)(4) From the front side of main body, remove the three screwsG attaching the TOP CHASSIS. (See Fig.8)Fig.5Fig.6Fig.7Fig.8DDEF FFFGGG1-8 (No.MB623)3.1.4 Removing the HDMI assembly (See Fig.9, 10)(1) Disconnect the card wire from HDMI assembly connectedto connector CN901 of the VIDEO 2 BOARD assembly.(See Fig.9)(2) Remove the two screws H and three screws J attaching theHDMI BOARD assembly. (See Fig.10)Fig.9Fig.10CN901HHJJJ(No.MB623)1-93.1.5 Removing the VIDEO 2 BOARD assembly (See Fig.11, 12)(1) Disconnect the card wire from VIDEO 2 BOARD assemblyconnected to connector CN905 of the MAIN BOARD as-sembly. (See Fig.11)(2) Remove the two screws K attaching the VIDEO 2 BOARDassembly. (See Fig.12)Fig.11Fig.123.1.6 Removing the HEAT SINK (See Fig.13)(1) Remove the three screws L attaching the HEAT SINK.Fig.13CN905KKL1-10 (No.MB623)3.1.7 Removing the POWER BOARD assembly (See Fig.14 to 17)(1) Remove the four screws M attaching the POWER BOARDassembly. (See Fig.14)(2) Remove the one screw N attaching the DUMMY BOARD.(See Fig.15)(3) Disconnect the connector wires from POWER BOARD as-sembly connected to connector CN200, CN201 andCN202 of the MAIN BOARD assembly. (See Fig.16)(4) Lift up the POWER BOARD assembly with POWERCORD, and then disconnect the POWER CORD from con-nector CN101 of the POWER BOARD assembly. (SeeFig.17)Fig.14Fig.15Fig.16Fig.17MMMMNCN200CN201CN202CN101