LG-LGHTW316-cdrec-sm 维修电路原理图.pdf

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1、DVD/CD RECEIVERSERVICE MANUALMODEL:LGHTW316FE-6100CVE, FE-6100TE, FE-6100WEFA-W6100SL, FA-W6100SR, ACC-W6100P/N : 3829RAT091DSEPTEMBER, 2003SERVICE MANUALMODEL: LH-DW6530 FE-6100CVE, FE-6100TE, FE-6100WE FA-W6100SL, FA-W6100SR, ACC-W6100CD-R/RWRadioFans.CN 收音机爱 好者资料库- 1-1 -SECTION 1. GENERAL SERVICI

2、NG PRECAUTIONS.1-2 ESD PRECAUTIONS.1-4 SPECIFICATIONS.1-5 LOCATION OF CUSTOMER CONTROLS.1-6SECTION 2. AUDIO PART ELECTRICAL TROUBLESHOOTINGGUIDE. 2-1 BLOCK DIAGRAM.2-6 SCHEMATIC DIAGRAMS.2-8 WIRING DIAGRAM.2-20 VOLTAGE SHEET (IC&TR) . 2-22 PRINTED CIRCUIT DIARGAMS.2-26SECTION 3. DVD PART ELECTRICAL

3、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. REPLACEMENT PARTS LIST.5-1SECTION 6. SPEAKER PART.6-1 ELECTRICAL TROUBLESHOOTINGGUIDE.

4、6-1 BLOCK DIAGRAM .6-7 SHEMATICDIAGRAMS .6-9 WIRING DIAGRAM.6-15 PRINTED CIRCUIT DIAGRAM . 6-17 SPEAKER EXPLODED VIEWS.6-21 REPLACEMENT PARTS LIST. 6-29CONTENTSRadioFans.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 storage

5、1) 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 shou

6、ld 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

7、 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

8、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 t

9、his.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

10、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. Preparation

11、s1) 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

12、) 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 co

13、mponent 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 b

14、ag. (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

15、 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 se

16、miconductor (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 techn

17、iques 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

18、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 preve

19、nt 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

20、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 elec

21、trically 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.CA

22、UTION : 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 carpete

23、d 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 M

24、AGNITUDE 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

25、 -REAR PANEL- 2-1 -SECTION 2. AUDIO PART ELECTRICAL TROUBLESHOOTING GUIDE- 2-2 -2. AUDIO . COM CIRCUITPOWER ONDoes CD/DVDappear at FLT?Does LOADINGappear at FLD?Does it appearDVD Error atFLD?Does Video1/2, TVAUDIO, FM 87.5 appearat FLD?OK.CheckConnector(PN903)ifis normally.Reconnet it.Refer to SMPSR

26、efer 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.

27、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- 2-3 -3. FRONT CIRCUIT (1/2) - 2-4 - 4. FRONT CIRCUIT (2/2)- 2-5 -MEMO2-62-7BLOCK DIAGRAM2-82-9SHEMATIC DIAGRAMS FRONT & POWER SCHEMATIC DIAGRAM2-102-11 MICOM SCHEMATI

28、C DIAGRAM2-122-13 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.2-142-15

29、DAP SCHEMATIC DIAGRAM AMP SCHEMATIC DIAGRAM2-162-17 SMPS SCHEMATIC DIAGRAM2-182-19NOTE: WarningParts that are shaded are critical With respectto risk of fire or electrical shock.2-202-21 WIRING DIAGRAMNOTE: WarningParts that are shaded are critical With respectto risk of fire or electrical shock.2-2

30、22-231.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.V688

31、83.3V92949-26.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.V59-2

32、5.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 40ADATA

33、3_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,

34、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

35、.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 7

36、30 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)1Audio1_L_OUT5Audio1_R+_IN2Audio1_L-_IN6

37、Audio1_R-_IN3Audio1_L+_IN7Audio1_R_OUT4-11.8V87).IC502(NJM4580M, OP AMP IC)PIN No.Volt(V)PIN No.Volt(V)1S/W_OUT5S/W_OUT2S/W-_IN6S/W_OUT3S/W+_IN7S/W_OUT4-11.8V811.9V8).IC503(NJM4580M, OP AMP IC)PIN No.Volt(V)PIN No.Volt(V)1H/Phone_L_OUT5H/Phone_R+_IN2H/Phone_L-_IN6H/Phone_R-_INVOLTAGE SHEET (IC&TR)2-

38、242-253H/Phone_L+_IN7H/Phone_R_OUT4-11.8V811.9V9).IC601(NJM2296M, VIDEO SWITCHING IC)PIN No.Volt(V)PIN No.Volt(V)1Video_OUT 925.V105.V3Video2_IN11Video_OUT4120 5Video1_IN136145.V7COMPOSITE_IN15Video_OUT8-12.V165.V10).IC710(STA505, DIGITAL AMP IC)PIN No.Volt(V)PIN No.Volt(V)PIN No.Volt(V)PIN No.Volt(

39、V)10 10REAR_L+_OUT190 283.28V2FRONT_L+_OUT11REAR_L+_OUT200 29REAR_L-_IN3FRONT_L+_OUT1231.5V214.89V30REAR_L+_IN431.5V130 224.89V31FRONT_L-_IN50 140 233.3V32FRONT_L+_IN60 1531.5V240 3326.36V731.5V16REAR_L-_OUT253.18V3426.36V8FRONT_L-_OUT17REAR_L-_OUT263.16V3531.42V9FRONT_L-_OUT18273.16V3631.42V11).IC7

40、30(STA505, DIGITAL AMP IC)PIN No.Volt(V)PIN No.Volt(V)PIN No.Volt(V)PIN No.Volt(V)10 10FRONT_R+_OUT190 283.28V2REAR_R+_OUT11FRONT_R+_OUT200 29sFRONT_R-_IN3REAR_R+_OUT1231.5V214.89V30FRONT_R+_IN431.5V130 224.89V31REAR_R-_IN50 140 233.3V32REAR_R+_IN60 1531.5V240 3326.36V731.5V16FRONT_R-_OUT253.18V3426

41、.36V8REAR_R-_OUT17FRONT_R-_OUT263.16V3531.42V9REAR_R-_OUT18273.16V3631.42V12).IC750(STA501, DIGITAL AMP IC)PIN No.Volt(V)PIN No.Volt(V)PIN No.Volt(V)PIN No.Volt(V)10 10190 283.28V2CENTER+_OUT11200 293CENTER+_OUT1231.5V214.89V30431.5V130 224.89V31CENTER-_IN50 140 233.3V32CENTER+_IN60 1531.5V240 3326.

42、36V731.5V16253.18V3426.36V8CENTER-_OUT17263.16V3531.42V9CENTER-_OUT18273.16V3631.42V13).IC770(STA505, DIGITAL AMP IC)PIN No.Volt(V)PIN No.Volt(V)PIN No.Volt(V)PIN No.Volt(V)10 10WOOFER-_OUT190 283.28V2WOOFER+_OUT11WOOFER-_OUT200 29WOOFER-_IN3WOOFER+_OUT1231.5V214.89V30WOOFER-_IN431.5V130 224.89V31WO

43、OFER+_IN50 140 233.3V32WOOFER+_IN60 1531.5V240 3326.36V731.5V16WOOFER-_OUT253.18V3426.36V8WOOFER+_OUT17WOOFER-_OUT263.16V3531.42V9WOOFER+_OUT18273.16V3631.42V2.LH-D6530(SMPS)1).IC901(KA5M0365R-YDTU, PWM IC)PIN No.Volt(V)1GND2300V312V40 6V2).IC902(KA5Q1265RF-YDTU, PWM IC)PIN No.Volt(V)1300V2GND315V40

44、 6.5V50 3V3).IC921(KA378R05-TSTU, REGULATOR IC)PIN No.Volt(V)15.6V25V3GND42.5V4).IC922(KA78R12TSTU, REGULATOR IC)PIN No.Volt(V)113V212V3GND43.3V5).IC923(KA78R33TSTU, REGULATOR IC)PIN No.Volt(V)14.5V23.3V3GND42.5V6).IC924(KIA7808API-CU, REGULATOR IC)PIN No.Volt(V)112V2GND38V7).IC941(KA431AZ, REGULATO

45、R IC)PIN No.Volt(V)12.5V2GND34.8V8).IC942(KA431AZ, REGULATOR IC)PIN No.Volt(V)12.5V2GND330V2-262-27PRINTED CIRCUIT DIAGRAMS MAIN P.C BOARD (SOLDER SIDE)2-282-29 MAIN P.C BOARD (COMPONENT SIDE)2-302-31 FRONT P.C. BOARD 2-322-33 SMPS P.C. BOARD - 3-1 -SECTION 3. DVD PART 1. Power check flowELECTRICAL

46、TROUBLESHOOTING GUIDE- 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)

47、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

48、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. MT1

49、379 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 Signal3-213-22DVD PART SCHEMATIC DIAGRAMS MPEG SCHEMATIC DIAGRAM3-243-23 SERVO SCHEMATIC DIAGRAM INTERFACE SCHEMATIC DIAGR

50、AM3-263-253-273-28VOLTAGE SHEET (IC&TR)3-293-30PRINTED CIRCUIT DIAGRAM DVD P.C. BOARD(SOLDER SIDE)3-313-32 DVD P.C. BOARD (COMPONENT SIDE)4-1 4-2 351301268302303A46A41A26275266267A43270272264265250260269305A47TUNER454454SECTION 4. EXPLODED VIEWS CABINET AND MAIN FRAME SECTIONNOTE) Refer to “SECTION