Zenith-DVT316-cd-sm 维修电路原理图.pdf

RadioFans.CN 收音机爱 好者资料库- 1-1 -SECTION 1. GENERAL SERVICING PRECAUTIONS.1-2 ESD PRECAUTIONS.1-4 SPECIFICATIONS.1-5 LOCATION OF CUSTOMER CONTROLS.1-6SECTION 2. AUDIO PART BLOCK DIAGRAM.2-1 SCHEMATIC DIAGRAMS.2-3 WIRING DIAGRAM.2-15 VOLTAGE SHEET (IC&TR) . 2-17 PRINTED CIRCUIT DIARGAMS.2-21SECTION 3. DVD PART DVD PART ELECTRICAL TROUBLESHOOTING GUIDE .3-1 DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING . 3-8 DVD PART SCHEMATIC DIAGRAMS.3-21 VOLTAGE SHEET (IC & TR).3-27 PRINTED CIRCUIT DIAGRAM.3-29SECTION 4. EXPLODED VIEWS.4-1SECTION 5. SPEAKER PART.5-1SECTION 6. REPLACEMENT PARTS LIST.6-1CONTENTSRadioFans.CN 收音机爱 好者资料库SECTION 1. GENERAL PARTSERVICING PRECAUTIONSNOTES REGARDING HANDLING OF THE PICK-UP1. Notes for transport and storage1) The pick-up should always be left in its conductive bag until immediately prior to use.2) The pick-up should never be subjected to external pressure or impact.2. Repair notes1) The pick-up incorporates a strong magnet, and so should never be brought close to magnetic materials.2) The pick-up should always be handled correctly and carefully, taking care to avoid external pressure andimpact. If it is subjected to strong pressure or impact, the result may be an operational malfunction and/ordamage to the printed-circuit board.3) Each and every pick-up is already individually adjusted to a high degree of precision, and for that reasonthe adjustment point and installation screws should absolutely never be touched.4) Laser beams may damage the eyes!Absolutely never permit laser beams to enter the eyes!Also NEVER switch ON the power to the laser output part (lens, etc.) of the pick-up if it is damaged.5) Cleaning the lens surfaceIf there is dust on the lens surface, the dust should be cleaned away by using an air bush (such as usedfor camera lens). The lens is held by a delicate spring. When cleaning the lens surface, therefore, acotton swab should be used, taking care not to distort this.6) Never attempt to disassemble the pick-up.Spring by excess pressure. If the lens is extremely dirty, apply isopropyl alcohol to the cotton swab. (Donot use any other liquid cleaners, because they will damage the lens.) Take care not to use too much ofthis alcohol on the swab, and do not allow the alcohol to get inside the pick-up.- 1-2 -Storage in conductive bagDrop impactNEVER look directly at the laser beam, and dont letcontact fingers or other exposed skin.MagnetHow to hold the pick-upPressurePressureCotton swabConductive SheetNOTES REGARDING COMPACT DISC PLAYER REPAIRS 1. Preparations1) Compact disc players incorporate a great many ICs as well as the pick-up (laser diode). Thesecomponents are sensitive to, and easily affected by, static electricity. If such static electricity is highvoltage, components can be damaged, and for that reason components should be handled with care.2) The pick-up is composed of many optical components and other high-precision components. Care mustbe taken, therefore, to avoid repair or storage where the temperature of humidity is high, where strongmagnetism is present, or where there is excessive dust.2. Notes for repair1) Before replacing a component part, first disconnect the power supply lead wire from the unit2) All equipment, measuring instruments and tools must be grounded.3) The workbench should be covered with a conductive sheet and grounded.When removing the laser pick-up from its conductive bag, do not place the pick-up on the bag. (This isbecause there is the possibility of damage by static electricity.)4) To prevent AC leakage, the metal part of the soldering iron should be grounded.5) Workers should be grounded by an armband (1M)6) Care should be taken not to permit the laser pick-up to come in contact with clothing, in order to preventstatic electricity changes in the clothing to escape from the armband.7) The laser beam from the pick-up should NEVER be directly facing the eyes or bare skin.- 1-3 -ArmbandConductiveSheetResistor(1 Mohm)Resistor(1 Mohm)ESD PRECAUTIONSElectrostatically Sensitive Devices (ESD)Some semiconductor (solid state) devices can be damaged easily by static electricity. Such componentscommonly are called Electrostatically Sensitive Devices (ESD). Examples of typical ESD devices are integratedcircuits and some field-effect transistors and semiconductor chip components. The following techniques shouldbe used to help reduce the incidence of component damage caused by static electricity.1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain offany electrostatic charge on your body by touching a known earth ground. Alternatively, obtain and wear acommercially available discharging wrist strap device, which should be removed for potential shock reasonsprior to applying power to the unit under test.2. After removing an electrical assembly equipped with ESD devices, place the assembly on a conductivesurface such as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly.3. Use only a grounded-tip soldering iron to solder or unsolder ESD devices.4. Use only an anti-static solder removal device. Some solder removal devices not classified as anti-static cangenerate electrical charges sufficient to damage ESD devices.5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ESDdevices.6. Do not remove a replacement ESD device from its protective package until immediately before you are readyto install it. (Most replacement ESD devices are packaged with leads electrically shorted together byconductive foam, aluminum foil or comparable conductive materials).7. Immediately before removing the protective material from the leads of a replacement ESD device, touch theprotective material to the chassis or circuit assembly into which the device will by installed.CAUTION : BE SURE NO POWER IS APPLIED TO THE CHASSIS OR CIRCUIT, AND OBSERVE ALL OTHERSAFETY PRECAUTIONS.8. Minimize bodily motions when handing unpackaged replacement ESD devices. (Otherwise harmless motionsuch as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor cangenerate static electricity sufficient to damage an ESD device).CAUTION. GRAPHIC SYMBOLS- 1-4 -THE LIGHTNING FLASH WITH APROWHEAD SYMBOL. WITHIN AN EQUILATERALTRIANGLE, IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OFUNINSULATED “DANGEROUS VOLTAGE” THAT MAY BE OF SUFFICIENT MAGNITUDE TOCONSTITUTE A RISK OF ELECTRIC SHOCK.THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TOALERT THE SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETYINFORMATION IN SERVICE LITERATURE.- 1-5 -SPECIFICATIONS?- 1-6 -LOCATION OF CUSTOMER CONTROLSFRONT PANELDISPLAY WINDOW - 1-7 -REAR PANEL- 1-8 -AUDIO ELECTRICAL TROUBLESHOOTING GUIDEINSERTPOWER CORD.TURN ONTHE RED LED?IS POWER ON?CHECK POWER PLUGAND POWER SUPPLY CIRCUIT .DOES INITIALREAD WORK?DOES IT PLAY?YESNOYESYESOKNOYESNONOCHECK POWER SUPPLY CIRCUIT .CHECK LASER CIRCUIT .CHECK TRACKING SERVO CIRCUIT.TURN POWER ON.CHECK FOCUS CIRCUIT.CHECK DISC.DOES IT OUTPUTAUDIO?YESNOCHECK AUDIO CIRCUIT.1.1.1.1.- 1-9 -2. AUDIO . COM CIRCUITPOWER ONDoes CD/DVDappear at FLT?Does LOADINGappear at FLD?Does it appearDVD Error atFLD?Does Video1/2, TVAUDIO, FM 87.5appear at FLD?OK.CheckConnector(PN903)ifis normally.Reconnet it.Refer to SMPSRefer to oscillatorCircuit.Check DVD Reset Waveform.Check IC101 Reset Wavefrom.Check 3.3V line.Check Power dection Circuit.Check power partof Main B/D.Check oscillatorof x101.Check if PN200PINis High.Check if IC101PINis High.Check if IC101 PIN, , , is high(5V).Check if IC101PINis High .Replace IC101.Does no Dise orTime appear at FLD?Check if DVD an Audio Micom Interface is OK.Check power.Check DVD Module.Check SMPS.174672 9011526- 1-10 -3. FRONT CIRCUIT (1/2)POWER ONTURN ONTHE GREEN LED?CHECK IF THE FRONT POWERIS OK(*2).IS DIGITRON ON NORMALLY?CHECK IFTHE HEADPHONEIS OK.YESNOYESNOYESREFER TO SMPS PART.CHECK IF THE REMOCONIS OK.YESCHECK IF THE PN101/PN102IS OK?RECONNECT IT.(REFER TO NOTICE *1).CHECK IFALL BUTTENSARE OK.YESCHECK IFTHE VOLUME ISOK.YESFRONT B/D OK.YESCHECK IF THE VFD001 PINSARE OK.CHECK PATTERNAND RESOLDERING .NOYES*1: When it is needed to reconnect FPC cable into PN101/PN102,short ZD972 + and screw(chassis GND) near to ZD972.*2:PN101 PinsPIN2 : -23.0VPIN3 : -27.5VPIN4 : 5.0VPIN11 : -34.0VPIN20 : 12.0VNONO- 1-11 - 4. FRONT CIRCUIT (2/2)MEMO- 1-12 - 3-1 -SECTION 3. DVD PART ELECTRICALTROUBLESHOOTING GUIDE1. Power check flow- 3-2 -2. Test & debug flow- 3-3 - 3-4 - 3-5 - 3-6 - 3-7 - 3-8 -DETAILS AND WAVEFORMS ON SYSTEM TESTAND DEBUGGING1. SYSTEM 27MHz CLOCK,RESET,FLASH R/W SIGNAL1) MT1379 main clock is at 27MHz(X501)2) MT1336 reset is high active- 3-9 -3) RS232 waveform during procedure(Downloading)4) Flash R/W enable signal during download(Downloading)- 3-10 -2. SDRAM CLOCK1) MT1379 main clock is at 27MHz(X501)3. TRAY OPEN/CLOSE SIGNAL1) Tray open/close waveform- 3-11 -2) Tray close waveform3) Tray open waveform- 3-12 -4. SLED CONTROL RELATED SIGNAL (NO DISC CONDITION)5. LENS CONTROL RELATED SIGNAL(NO DISC CONDITION)- 3-13 -6. LASER POWER CONTROL RELATED SIGNAL(NO DISC CONDITION)7. DISC TYPE JUDGEMENT WAVEFORM- 3-14 - 3-15 -8. FOCUS ON WAVEFORM- 3-16 -9. SPINDLE CONTROL WAVEFORM (NO DISC CONDITION)- 3-17 -10. TRACKING CONTROL RELATED SIGNAL(System checking)- 3-18 -11. RF WAVEFORM12. MT1379 AUDIO OPTICAL AND COAXIAL OUTPUT (ASPDIF)- 3-19 -13. MT1379 VIDEO OUTPUT WAVEFORM1) Full colorbar signal(CVBS)2) Y- 3-20 -3) C14. AUDIO OUTPUT FORM AUDIO DAC1) Audio related Signal- 5-1 -SECTION 5. SPEAKER PARTMODEL: LHS-D6530W853851852850854855862LOCA.NO.PART NOABCDEFGHDESCRIPTIONSPECIFICATIONREMARKS8503720RMF060AOOOOOOOOPANEL,FRONTSPK LHS-D6530W MOLD SILVER SPR8513701RM0047AOOOOOOOONET ASSEMBLYSPK LHS-D6530W NET ASSY8526400WETN01AOOOOOOOOSPEAKER,WOOFER18P90EHC1391 EAW WOOFER 4 OHM8533091RMW058AOOOOOOOCABINET ASSEMBLYSPK LHS-D6530W WOOD CABINET8533091RMW058BOCABINET ASSEMBLYSPK LHS-D6530W CABINET ASSY (E8546871RU9271FOOOOOOOOPWB(PCB) ASSEMBLY,SUBSET(AUDIO LHS-D6230W SUB WOOFER 2.5M, OR8553610RM0002AOOOOOOOOFOOTRUBBER FE-5620WE STANDARD 4 EA862353M050COOOOOOOOSCREWBH 3.5X16 FBKRUN DATE : 16.JUNE.2003MODEL : LGEPS, LGEAP, LGEGF, LGECB ABANS, BROTHERS, LGEMC, LGEBN- 5-2 -MODEL: LHS-D6530C862854853A800855852851850LOCA.NO.PART NODESCRIPTIONSPECIFICATIONREMARKS8503720RMF058APANEL,FRONTSPK LHS-D6530CV MOLD SILVER SP8516400DBHX01ASPEAKER,TWEETERSN11AP06D BALHAE TWEETER(DOME)8526400WETC01ASPEAKER,WOOFER08P60EHC1390J EAW WOOFER 8 OHM8533110RMP019ACASELHS-D6530CV MOLD SILVER SPRAY8546871RU9272APWB(PCB) ASSEMBLY,SUBSET(AUDIOLHS-D6530V/C/T TERMINAL + 2.2U8553610RM0001FFOOTFE-5620 FOOT (PH 10 X 2T,EVA,2862353M050DSCREWWOOD DRC 3.5X 12 BK8656871RU9271CPWB(PCB) ASSEMBLY,SUBSET(AUDIOLHS-D6230T CENTER WIRE(5M)/ (GA8006401RM0064ASPEAKER ASSEMBLY08R60EHC3015 EAW LHS-D6530C(STRUN DATE : 16.JUNE.2003- 5-3 -MODEL: LHS-D6530T862854853864852851A800850LOCA.NO.PART NODESCRIPTIONSPECIFICATIONREMARKS8503720RMF059APANEL,FRONTSPK LHS-D6530S MOLD SILVER SPR8516400DBHX01ASPEAKER,TWEETERSN11AP06D BALHAE TWEETER(DOME)8526400WETC01BSPEAKER,WOOFER08R60EHC3015 EAW FULL-RANGE(HI8533110RMP020ACASELHS-D6530S MOLD SILVER SPRAY8546871RU9272APWB(PCB) ASSEMBLY,SUBSET(AUDIOLHS-D6530V/C/T TERMINAL + 2.2U862353M050DSCREWWOOD DRC 3.5X 12 BK864353M056DSCREWTRQ 3.5X8 FBK8656871RU9271DPWB(PCB) ASSEMBLY,SUBSET(AUDIOLHS-D6230T REAR WIRE(10M) R/CH8666871RU9271EPWB(PCB) ASSEMBLY,SUBSET(AUDIOLHS-D6230T REAR WIRE(10M)/ L/CA8006401RM0066ASPEAKER ASSEMBLY08R60EHC3015 EAW LHS-D6530T (SRUN DATE : 16.JUNE.2003- 5-4 -MODEL: LHS-D6530V853A800862854852851850LOCA.NO.PART NODESCRIPTIONSPECIFICATIONREMARKS8503720RMF057APANEL,FRONTSPK KHS-D6530 MOLD SILVER SPRA8516400DBHX01ASPEAKER,TWEETERSN11AP06D BALHAE TWEETER(DOME)8526400WETC01ASPEAKER,WOOFER08P60EHC1390J EAW WOOFER 8 OHM8533110RMP018ACASELHS-D6530V MOLD SILVER SPRAY8546871RU9272APWB(PCB) ASSEMBLY,SUBSET(AUDIOLHS-D6530V/C/T TERMINAL + 2.2U862353M050DSCREWWOOD DRC 3.5X 12 BK8656871RU9271APWB(PCB) ASSEMBLY,SUBSET(AUDIOLHS-D6230T FRONT WIRE(5M) R CH8666871RU9271BPWB(PCB) ASSEMBLY,SUBSET(AUDIOLHS-D6230T FRONT WIRE(5M)/ L CA8006401RM0065ASPEAKER ASSEMBLY08R60EHC3015 EAW LHS-D6530V (SRUN DATE : 16.JUNE.20032-1 2-2SECTION 2. AUDIO PARTBLOCK DIAGRAM2-32-4SHEMATIC DIAGRAMS FRONT & POWER SCHEMATIC DIAGRAM2-52-6 MICOM SCHEMATIC DIAGRAM2-72-8 I/O SCHEMATIC DIAGRAMNOTE: WarningParts that are shaded are critical With respectto risk of fire or electrical shock.NOTE:1. Shaded(I) parts are critical for safety.Replace onlywith specified part number.2. Voltages are DC-measured with a digital voltmeferduring Play mode.2-92-10 DAP SCHEMATIC DIAGRAM AMP SCHEMATIC DIAGRAM2-112-12 SMPS SCHEMATIC DIAGRAM2-132-14NOTE: WarningParts that are shaded are critical With respectto risk of fire or electrical shock.2-152-16 WIRING DIAGRAMNOTE: WarningParts that are shaded are critical With respectto risk of fire or electrical shock.2-172-181.LH-D6530(MAIN)1).IC101(LC876748C-52K, MICOM)PIN No.Volt(V)PIN No.Volt(V)PIN No.Volt(V)PIN No.Volt(V)PIN No.Volt(V)12.15V214.88V41-31.V618124.8V223.94V42-28.V628231.36V233.26V43-29.V63834243.26V44-25.V642.2V845250 45-32.V65853.3V6262.75V464.85V66861.8V7274.85V47-31.V67873.17V8284.85V48-31.V68883.3V92949-26.V69890 1030-31.V50-25.V703.26V904.88V1131-31.V51-32.V713.15V911.5V1232-31.V52-26.V725.V921333-31.V53-26.V734.95V93140 34-31.V54-26.V744.96V94152.68V(9.8304MHz)35-31.V55-26.V75950 162.94V(9.8304MHz)36-31.V56-32.V76960 174.89V37-31.V57-32.V77970 184.86V38-31.V58-32.V78982.7V1939-31.V59-25.V79992.6V204.88V40-31.V600 801002.6V2).IC201(AK5365VQ, ADC & FUCTION IC)PIN No.Volt(V)PIN No.Volt(V)PIN No.Volt(V)PIN No.Volt(V)1122.5V23LRCK340 20 132.5V24MCLK350 3ADATA4_L_IN142.5V253.3V36ADATA1_R_IN40 152.5V263.3V370 5ADATA3_L_IN165.V270 38ADATA2_R_IN60 170 280 390 7ADATA2_L_IN182.5V290 40ADATA3_R_IN80 190 300 410 9ADATA1_L_IN203.3V313.3V42ADATA4_R_IN102.5V21ADATA_OUT323.3V430 112.5V22BCK333.9V443).IC202(AK4117VF-E2, DIR IC)PIN No.Volt(V)PIN No.Volt(V)10 13ADATA_IN23.3V14MCLK3154165SPDIF_IN1763.3V1870 193.3V82.2V(12.288MHz)203.3V92110LRCK2211BCK233.3V12ADATA_OUT240 4).IC203(74VHC244MTCX, BUFFER IC)PIN No.Volt(V)PIN No.Volt(V)10 11ADATA120 12ADATA23LRCK13ADATA0414ADATA35BCK15BCK6ADATA3167ADATA017LRCK8ADATA2180 9ADATA1190 100 203.2V5).IC301(PS9818, DAP IC)PIN No.Volt(V)PIN No.Volt(V)PIN No.Volt(V)PIN No.Volt(V)PIN No.Volt(V)10 210 41PWM_OUT61PWM_OUT810 20 223.3V422.5V62PWM_OUT823.3V32.35V23ADATA0430 630 833.3V45.V24ADATA1440 640 840 52.35V25ADATA245PWM_OUT653.3V850 62.32V26ADATA346PWM_OUT662.5V862.27(12.288MHz)70.89V27473.3V67PWM_OUT873.3V80 280 48PWM_OUT68PWM_OUT8890 293.3V49PWM_OUT690 89103.3V30500 70PWM_OUT90110 3151PWM_OUT71PWM_OUT912.5V120 3252PWM_OUT723.3V920 132.5V33530 730 93140 342.5V54PWM_OUT74PWM_OUT943.3V150 350 55PWM_OUT75PWM_OUT950 160 36PWM_OUT563.3V763.2V964.89V170 37PWM_OUT570 770 97180 380 58PWM_OUT781.5V9819BCK393 59PWM_OUT791.8V9920LRCK40PWM_OUT600 802.5V1006).IC501(NJM4580M, OP AMP IC)PIN No.Volt(V)PIN No.Volt(V)1Au