LG-LMSU1060-cs-sm 维修电路原理图.pdf

3CD CHANGERMINI Hi-Fi SYSTEMSERVICE MANUALMODEL : LM-U1060/LMS-U1060SERVICE MANUALMODEL : LM-U1060/LMS-U1060P/NO : AFN30721349 JUNE,2006RadioFans.CN 收音机爱 好者资料库- 1-1 -CONTENTS SECTION 1. GENERAL SERVICING PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 ESD PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 SPECIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5 SECTION 2. ELECTRICAL ELECTRICAL TROUBLESHOOTING GUIDE(AUDIO PART) . . . . . . . . . . . . . . . . . . . . . . . . 2-1 INTERNAL BLOCK DIAGRAM of ICs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13 ELECTRICAL TROUBLESHOOTIHG GUIDE & WAVEFORM(CD PART) . . . . . . . . . . . . . . 2-22 WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-36 BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-38 SCHEMATIC DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-40 PRINTED CIRCUIT DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-54 SECTION 3. EXPLODED VIEWS CABINET AND MAIN FRAME SECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1 TAPE DECK MECHANISM (A/R & A/S : RIGHT A/R DECK) . . . . . . . . . . . . . . . . . . . . . . . . . .3-3 TAPE DECK MECHANISM (A/R & A/S : LEFT A/S DECK) . . . . . . . . . . . . . . . . . . . . . . . . . . .3-5 CD MECHANISM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-7 SPEAKER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9 SECTION 4. REPLACEMENT PARTS LIST REPLACEMENT PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1RadioFans.CN 收音机爱 好者资料库- 1-2 -SECTION 1. GENERAL SERVICING PRECAUTIONSI NOTES 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, a cot-ton 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.Storage in conductive bagDrop impactNEVER look directly at the laser beam, and dont let contact fingers or other exposed skin.MagnetHow to hold the pick-upConductive SheetCotton swabPressurePressure- 1-3 -I NOTES REGARDING COMPACT DISC PLAYER REPAIRS1. Preparations1) Compact disc players incorporate a great many ICs as well as the pick-up (laser diode). These componentsare sensitive to, and easily affected by, static electricity. If such static electricity is high voltage, componentscan 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 must betaken, therefore, to avoid repair or storage where the temperature of humidity is high, where strong magnet-ism 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.CLEARING MALFUNCTIONYou can reset your unit to initial status if malfunction occur(button malfunction, display, etc.).Using a pointed good conductor(such as driver), simply short the RESET jump wire on the inside ofthe volume knob for more than 3 seconds.If you reset your unit, you must reenter all its settings(stations, clock, timer)NOTE: 1. To operate the RESET jump wire, pull the volume rotary knob and release it.2. If you wish to operate the RESET jump wire, it is necessary to unplug the power cord.Resistor(1 Mohm)ConductiveSheetResistor(1 Mohm)ArmbandRESET jump wireVOLUMEVOLUME KNOBDOWNUP- 1-4 - ESD PRECAUTIONSI Electrostatically 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 integrat-ed circuits and some field-effect transistors and semiconductor chip components. The following techniquesshould be 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 conductive sur-face 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-staticcan generate 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 areready to 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 ALLOTHER SAFETY 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 can gen-erate static electricity sufficient to damage an ESD device).CAUTION. GRAPHIC SYMBOLSTHE LIGHTNING FLASH WITH APROWHEAD SYMBOL. WITHIN AN EQUILATERAL TRIANGLE, ISINTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF UNINSULATED “DAN-GEROUS VOLTAGE” THAT MAY BE OF SUFFICIENT MAGNITUDE TO CONSTITUTE A RISK OFELECTRIC SHOCK.THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THESERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICELITERATURE.- 1-5 - SPECIFICATIONSGENERALPower supply Refer to the back panel of the unit.Power consumption Refer to the back panel of the unit.Net Weight 6.2 kgExternal dimensions (W x H x D) 273 x 321x 359 mmCDFrequency response 40 - 20000 HzSignal-to-noise ratio 75 dBDynamic range 75 dBTUNERFMTuning Range 87.5 - 108.0 MHzIntermediate Frequency 10.7 MHzSignal to Noise Ratio 60/55 dB Frequency Response 50 - 10000 HzAM MWTuning Range 522 - 1620 kHz or 520 - 1720 kHzIntermediate Frequency 450 kHzSignal to Noise Ratio 30 dBFrequency Response 140 - 1800 HzAMPMPLIFIER(LH-W96s)Output Power 100W +100W+150W LM-U1560+LMS-U1560W(SUB WOOFER)100W+100W LM-U1060 50W +50W LM-U56030W + 30W LM-U360T.H.D 0.5%Frequency Response 40 - 20000 HzSignal-to-noise ratio 75 dBTAPETape Speed 4.75cm/secWow Flutter 0.25% (MTT -111, JIS-WTD)F.F/REW Time 120sec (C-60)Frequency Response 250 - 8000HzSignal to Noise Ratio 43dBChannel Separation 50dB(P/B)/45dB(R/P)Erase Ratio 55dB (MTT-5513)SPEAKERSMODELLMS-U1560LMS-U1560WLMS-U560LMS-U360LMS-U1060(SUB WOOFER)Type 2way 2speaker 1way 1speaker 2way 2speaker 2way 2speakerImpedance 4344Frequency Response 50-20000Hz 50-15000Hz 55-20000Hz 55-20000HzSound Pressure Level 85dB/W (1m) 84dB/W (1m) 86dB/W (1m) 86dB/W (1m)Rated Input Power 100W 180W 50W 30WMax. Input Power 200W 360W 100W 60WNet Dimensions (W x H x D) 229X224X286mm 273x325x384mm 229X224X286mm 229X224X286mmNet Weight 3.8kg 6kg 3.9kg 3.8kg- 1-6 - 2-1 -SECTION 2. ELECTRICALELECTRICAL TROUBLESHOOTING GUIDE(AUDIO PART)P7904 6PIN P-SENS checkRefer to SMPSTroubleshootingCheck if IC101 KIA7042input is over 5VCheck if IC101 KIA7042input is over 4.3VIC101 KIA7042 relevant parts checkrelevant parts replacementnormalIC101 KIA7042?IC100 78KO/KF2 1 PINPower ChecknormalYESNONONONOYESYESYESYESI MICOM PART CHECK I- 2-2 -I MICOM PART CHECK IIQ102 BASE PIN0.6V HIGH checkQ102 COLLECTOR 0.6V LOW checkCheck if IC101KIA7042 outputpower is over 4.3Vrelevant parts checkrelevant parts replacementnormalrelevant parts replacementrelevant parts checknormalIC 103 8PIN IC 100 19,20,59PIN 5V checkX101:32.768KHzX100:9.8304MHz operationstatus checknormalP7904 5PIN 5.6V checkRefer to SMPSTroubleshootingOutput 5V operation check D101 1SR35relevant parts checknormalrelevant parts replacementD101 1SR35 both terminalpower checkQ101 EMITTER 5V checkand COLLECTONONONONONOYESYESYESYESYESYESYESYESYESYESYESYES- 2-3 -I IC103 KS4CD21CS CHECKIC100 78KOKF2 22,24 PIN CheckI FLD DISPLAY CHECK22 PIN DATAMICOM power 5V checkRefer to MICOMTroubleshootingrelevant parts replacementrelevant parts checknormalRefer to SMPSTroubleshootingP7302 assembly checkEach PIN power checknormalrelevant parts replacementnormalP7904 1,2,3 power checkF1+, F2 both terminal: 5V andabove VKK: power is over 26V P7302 connection statuscheck and power checkF+,F2- both termainal: 5V orabove VKK:26V or abovepower checkIC301 PT6324 Power check50 PIN VKK:-26V 9, 51 PIN +5VYESYESYESYESYESYESYESYESYESYESNONONONONONO- 2-4 -IC100 IC301 DATACommunication checkPIN PIN(ST8)75 PIN 3PIN(STB)(DO) 76 PIN 2PIN(DO)(DI) 77 PIN 4PIN(DI)(CLK)78 PIN 1PIN(CLK)If 5V defective D321 SR35input and output power checkrelevant parts check76 PIN DATA input checkrelevant parts checkrelevant parts replacementnormalrelevant parts replacementnormalFLT light onnormalIC100(STB)75 PIN (STB)(DO) 77 PIN 4PIN(DO)(CLK) 78 PIN 1PIN(CLK)Data output checkYESYESYESYESYESYESYESYESNONONONO- 2-5 -I PWM ALTERATION PART CHECKP7905 9PIN 3.3V checkX601 12.288MHz operationcheckIC604 PS982986 PIN CLK input checkIC100 78KOKF221 PWM_CLK22 PWM_DATA23 PWM_RESToutput checkIC604 PS9829 DATA inputcheck78 PIN DATA79 PIN CLK96 PIN RESTPWM MODULATOR outputcheckFL:75(+)74(-)FR:71(+)70(-)SW:68(+)67(-)normalIC604 PS9829 VDD PINPower check(3.10.22.29.39.47.56.65.72.87. 94)Refer to SMPSTroubleshootingrelevant parts check X60412.288MHznormalR668(470) output checknormalLINE resistance checkDATA:R671 CLK:R670RST:R665normalCD ASSY PS9829 communi-cation status check(P7403)IC604 PS9829 DATA input checknormalIC604 PS9829 parts checkrelevant parts replacementrelevant parts replacementrelevant parts replacementRefer to CDTroubleshootingCheck each line resistance checkYESYESYESYESYESYESYESYESYESYESYESYESNONONONONONONONONONONO- 2-6 -I POWER AMP PART CHECKP7905 3 PIN+12 13.14.15 PIN LM-U1560 : 32V/LM-U1060 : 32V/LM-U560 : 22V/LM-U360 : 16V Each IC700,701 34, 29, 26,21 PIN input power checkEach IC700, 701 1, 36.17, 18, 19 PIN +12V input powercheckPWM MODULATOR inputpower check Each IC4.6.14.16 PINPOWER IC 700.701.702.703 34.29.27.20 PIN outputcheckOutput LINE COIL checknormalRefer to SMPSTroubleshootingEach LINE resistance outputpower checkIC700:R702, 701, 726, 727,724IC701:R730, 729, 750 ,753,752(Only LM-U1560)relevant parts replacementYESYESYESYESYESYESNONONO- 2-7 -I AUX FUNCTIONCheck whether JK800 contacts or notIC200(BU4052)4,11PIN input waveform checkIC200(BU4052)3,13PIN outputwaveform checkIC801 (MC4580) 3, 5 PINinput waveform checkIC801(MC4580) Pins 1, 7 output checkIC603(CS5340) Pins10, 12input checknormalIC200 (BU4052)16PINVDD,8PIN VSS power check-COM (IC100) 3, 6PINCommunication checkRefer to SMPSTroubleshootingIC603 Pins2, 7, 8 checkrelevant parts replacementIC801 (MC4580)4PINVSS,8PIN VDD power checkrelevant parts replacementIC603 Pin4 SDout checkRelevant Part repplacementYESYESYESYESYESYESYESYESYESNONONONONONO- 2-8 -I TUNER FUNCTION CHECKTuner module (TUN800) operation checkI TAPE FUNCTION CHECKTUNER MODUEL powercheck (2PIN 9Vcheck)IC200 (BU4052)16PIN-VDD,8PIN VSS power checkIC801(MC4580)4PINVSS,8PIN VDD power checkIC200 (BU4052)16PIN-VDD,8PIN VSS power checkIC200(BU4052)1,12PIN input waveform checkIC200 (BU4052)3,13PIN output waveform checkIC601(BU4052)2,15PIN input waveform checkIC801 (MC4580)2,6PIN inputwaveform check.TAPE PCB ASSYIC801 (MC4580)2,6PIN inputcheck IC200(BU4052)2,15PIN input waveform checkIC200 (BU4052)3,13PIN output check IC601(BU4052)2,15PIN input waveformcheckYESYESYESIC801(MC4580) Pins 1, 7input checkYESIC603(CS95340) Pins10, 12input checkYESIC801(MC4580) Pins 1, 7input checkIC603(CS95340) Pins10, 12input checkYESYESYESYESYESNONOYESNONOrelevant parts replacementYESrelevant parts replacementYESrelevant parts replacementIC200 (BU4052)16PIN-VDD,8PIN VSS power checkNOYESrelevant parts