LG-LMSU1060-cs-sm 电路图 维修手册.pdf

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1、3CD CHANGER MINI Hi-Fi SYSTEM SERVICE MANUAL MODEL : LM-U1060/LMS-U1060SERVICE MANUAL MODEL : LM-U1060/LMS-U1060P/NO : AFN30721349 JUNE,2006 RadioFans.CN 收音机爱 好者资料库 - 1-1 - CONTENTS SECTION 1. GENERAL SERVICING PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2、 . . . . . . . . 1-2 ESD PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 SPECIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5 SECTION 2. ELECTRICAL

3、ELECTRICAL TROUBLESHOOTING GUIDE(AUDIO PART) . . . . . . . . . . . . . . . . . . . . . . . . 2-1 INTERNAL BLOCK DIAGRAM of ICs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13 ELECTRICAL TROUBLESHOOTIHG GUIDE & WAVEFORM(CD PART) . . . . . . . . . . . . . . 2-22

4、WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-36 BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-38 SCHEMATIC DIAGRAMS . . . . . . . . . . . . .

5、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-40 PRINTED CIRCUIT DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-54 SECTION 3. EXPLODED VIEWS CABINET AND MAIN FRAME SECTION . . . . . . . . . . . . . . . . . . . . . . . .

6、. . . . . . . . . . . . . . . .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 . . . . . . . . . . . . . . . . . . . . . .

7、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-7 SPEAKER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9 SECTION 4. REPLACEMENT PARTS LIST REPLACEMENT PARTS LIST . . . . . . . . . . . . . . . .

8、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1 RadioFans.CN 收音机爱 好者资料库 - 1-2 - SECTION 1. GENERAL SERVICING PRECAUTIONS I NOTES REGARDING HANDLING OF THE PICK-UP 1. Notes for transport and storage 1) The pick-up should always be left in its conductive bag until immediately prior

9、 to use. 2) The pick-up should never be subjected to external pressure or impact. 2. Repair notes 1) 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 pr

10、essure and impact. If it is subjected to strong pressure or impact, the result may be an operational malfunction and/or damage to the printed-circuit board. 3) Each and every pick-up is already individually adjusted to a high degree of precision, and for that reason the adjustment point and installa

11、tion 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 surface If there is dust on the lens s

12、urface, the dust should be cleaned away by using an air bush (such as used for 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 exces

13、s pressure. If the lens is extremely dirty, apply isopropyl alcohol to the cotton swab. (Do not use any other liquid cleaners, because they will damage the lens.) Take care not to use too much of this alcohol on the swab, and do not allow the alcohol to get inside the pick-up. Storage in conductive

14、bagDrop impact NEVER look directly at the laser beam, and dont let contact fingers or other exposed skin. Magnet How to hold the pick-up Conductive Sheet Cotton swab Pressure Pressure RadioFans.CN 收音机爱 好者资料库 - 1-3 - I NOTES REGARDING COMPACT DISC PLAYER REPAIRS 1. Preparations 1) Compact disc player

15、s incorporate a great many ICs as well as the pick-up (laser diode). These components are sensitive to, and easily affected by, static electricity. If such static electricity is high voltage, components can be damaged, and for that reason components should be handled with care. 2) The pick-up is com

16、posed of many optical components and other high-precision components. Care must be taken, 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 repair 1) Before replacing a component part,

17、first disconnect the power supply lead wire from the unit 2) 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 i

18、s because 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

19、 to prevent static 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 MALFUNCTION You can reset your unit to initial status if malfunction occur(button malfunction, display, etc.). Using a

20、 pointed good conductor(such as driver), simply short the RESET jump wire on the inside of the 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

21、. If you wish to operate the RESET jump wire, it is necessary to unplug the power cord. Resistor (1 Mohm) Conductive Sheet Resistor (1 Mohm) Armband RESET jump wire VOLUME VOLUME KNOB DOWN UP - 1-4 - ESD PRECAUTIONS I Electrostatically Sensitive Devices (ESD) Some semiconductor (solid state) devices

22、 can be damaged easily by static electricity. Such components commonly 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 techniques should be used to help

23、reduce the incidence of component damage caused by static electricity. 1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any electrostatic charge on your body by touching a known earth ground. Alternatively, obtain and wear a commercially availa

24、ble discharging wrist strap device, which should be removed for potential shock reasons prior 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 cha

25、rge 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 can generate electrical charges sufficient to damage ESD devices. 5. Do no

26、t use freon-propelled chemicals. These can generate electrical charges sufficient to damage ESD devices. 6. Do not remove a replacement ESD device from its protective package until immediately before you are ready to install it. (Most replacement ESD devices are packaged with leads electrically shor

27、ted together by conductive foam, aluminum foil or comparable conductive materials). 7. Immediately before removing the protective material from the leads of a replacement ESD device, touch the protective material to the chassis or circuit assembly into which the device will by installed. CAUTION : B

28、E SURE NO POWER IS APPLIED TO THE CHASSIS OR CIRCUIT, AND OBSERVE ALL OTHER SAFETY PRECAUTIONS. 8. Minimize bodily motions when handing unpackaged replacement ESD devices. (Otherwise harmless motion such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floo

29、r can gen- erate static electricity sufficient to damage an ESD device). CAUTION. GRAPHIC SYMBOLS THE LIGHTNING FLASH WITH APROWHEAD SYMBOL. WITHIN AN EQUILATERAL TRIANGLE, IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF UNINSULATED “DAN- GEROUS VOLTAGE” THAT MAY BE OF SUFFICIENT MAGNI

30、TUDE TO CONSTITUTE A RISK OF ELECTRIC SHOCK. THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE LITERATURE. - 1-5 - SPECIFICATIONS GENERAL Power supply Refer to the back panel of the unit. Power c

31、onsumption Refer to the back panel of the unit. Net Weight 6.2 kg External dimensions (W x H x D) 273 x 321x 359 mm CD Frequency response 40 - 20000 Hz Signal-to-noise ratio 75 dB Dynamic range 75 dB TUNER FM Tuning Range 87.5 - 108.0 MHz Intermediate Frequency 10.7 MHz Signal to Noise Ratio 60/55 d

32、B Frequency Response 50 - 10000 Hz AM MW Tuning Range 522 - 1620 kHz or 520 - 1720 kHz Intermediate Frequency 450 kHz Signal to Noise Ratio 30 dB Frequency Response 140 - 1800 Hz AMPMPLIFIER(LH-W96s) Output Power 100W +100W+150W LM-U1560+LMS-U1560W(SUB WOOFER) 100W+100W LM-U1060 50W +50W LM-U560 30W

33、 + 30W LM-U360 T.H.D 0.5% Frequency Response 40 - 20000 Hz Signal-to-noise ratio 75 dB TAPE Tape Speed 4.75cm/sec Wow Flutter 0.25% (MTT -111, JIS-WTD) F.F/REW Time 120sec (C-60) Frequency Response 250 - 8000Hz Signal to Noise Ratio 43dB Channel Separation 50dB(P/B)/45dB(R/P) Erase Ratio 55dB (MTT-5

34、513) SPEAKERS MODELLMS-U1560LMS-U1560WLMS-U560LMS-U360 LMS-U1060(SUB WOOFER) Type 2way 2speaker 1way 1speaker 2way 2speaker 2way 2speaker Impedance 4344 Frequency Response 50-20000Hz 50-15000Hz 55-20000Hz 55-20000Hz Sound Pressure Level 85dB/W (1m) 84dB/W (1m) 86dB/W (1m) 86dB/W (1m) Rated Input Pow

35、er 100W 180W 50W 30W Max. Input Power 200W 360W 100W 60W Net Dimensions (W x H x D) 229X224X286mm 273x325x384mm 229X224X286mm 229X224X286mm Net Weight 3.8kg 6kg 3.9kg 3.8kg - 1-6 - - 2-1 - SECTION 2. ELECTRICAL ELECTRICAL TROUBLESHOOTING GUIDE(AUDIO PART) P7904 6PIN P-SENS check Refer to SMPS Troubl

36、eshooting Check if IC101 KIA7042 input is over 5V Check if IC101 KIA7042 input is over 4.3V IC101 KIA7042 relevant parts check relevant parts replacement normal IC101 KIA7042? IC100 78KO/KF2 1 PIN Power Check normal YES NO NO NONO YES YES YES YES I MICOM PART CHECK I - 2-2 - I MICOM PART CHECK II Q1

37、02 BASE PIN 0.6V HIGH check Q102 COLLECTOR 0.6V LOW check Check if IC101 KIA7042 output power is over 4.3V relevant parts check relevant parts replacement normal relevant parts replacement relevant parts check normal IC 103 8PIN IC 100 19,20,59 PIN 5V check X101:32.768KHz X100:9.8304MHz operation st

38、atus check normal P7904 5PIN 5.6V check Refer to SMPS Troubleshooting Output 5V operation check D101 1SR35 relevant parts check normal relevant parts replacement D101 1SR35 both terminal power check Q101 EMITTER 5V check and COLLECTO NO NO NO NO NO YES YES YES YES YES YES YES YES YES YES YES YES - 2

39、-3 - I IC103 KS4CD21CS CHECK IC100 78KOKF2 22,24 PIN Check I FLD DISPLAY CHECK 22 PIN DATAMICOM power 5V check Refer to MICOM Troubleshooting relevant parts replacement relevant parts check normal Refer to SMPS Troubleshooting P7302 assembly check Each PIN power check normal relevant parts replaceme

40、nt normal P7904 1,2,3 power check F1+, F2 both terminal: 5V and above VKK: power is over 26V P7302 connection status check and power check F+,F2- both termainal: 5V or above VKK:26V or above power check IC301 PT6324 Power check 50 PIN VKK:-26V 9, 51 PIN +5V YES YES YES YES YES YES YES YES YES YES NO

41、NO NO NO NO NO - 2-4 - IC100 IC301 DATA Communication check PIN 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 SR35 input and output power check relevant parts check 76 PIN DATA input check relevant parts check relevant parts replacemen

42、t normal relevant parts replacement normal FLT light on normal IC100 (STB)75 PIN (STB) (DO) 77 PIN 4PIN(DO) (CLK) 78 PIN 1PIN(CLK) Data output check YES YES YES YES YES YES YES YES NO NO NO NO - 2-5 - I PWM ALTERATION PART CHECK P7905 9PIN 3.3V check X601 12.288MHz operation check IC604 PS9829 86 PI

43、N CLK input check IC100 78KOKF2 21 PWM_CLK 22 PWM_DATA 23 PWM_REST output check IC604 PS9829 DATA input check 78 PIN DATA 79 PIN CLK 96 PIN REST PWM MODULATOR output check FL:75(+)74(-)FR:71(+)70(-) SW:68(+)67(-) normal IC604 PS9829 VDD PIN Power check (3.10.22.29.39.47.56.65.72. 87. 94) Refer to SM

44、PS Troubleshooting relevant parts check X604 12.288MHz normal R668(470) output check normal LINE resistance check DATA:R671 CLK:R670 RST:R665 normal CD ASSY PS9829 communi- cation status check(P7403) IC604 PS9829 DATA input check normal IC604 PS9829 parts check relevant parts replacement relevant pa

45、rts replacement relevant parts replacement Refer to CD Troubleshooting Check each line resistance check YES YES YES YES YES YES YES YES YES YES YES YES NO NO NO NO NO NO NO NO NO NO NO - 2-6 - I POWER AMP PART CHECK P7905 3 PIN+12 13.14.15 PIN LM-U1560 : 32V/LM-U1060 : 32V/LM-U560 : 22V/LM-U360 : 16

46、V Each IC700,701 34, 29, 26, 21 PIN input power check Each IC700, 701 1, 36.17, 18, 19 PIN +12V input power check PWM MODULATOR input power check Each IC 4.6.14.16 PIN POWER IC 700.701.702.703 34.29.27.20 PIN output check Output LINE COIL check normal Refer to SMPS Troubleshooting Each LINE resistan

47、ce output power check IC700:R702, 701, 726, 727, 724 IC701:R730, 729, 750 ,753, 752(Only LM-U1560) relevant parts replacement YES YES YES YES YES YES NO NO NO - 2-7 - I AUX FUNCTION Check whether JK800 contacts or not IC200 (BU4052)4,11PI N input waveform check IC200 (BU4052)3,13PIN output waveform

48、check IC801 (MC4580) 3, 5 PIN input waveform check IC801(MC4580) Pins 1, 7 output check IC603(CS5340) Pins10, 12 input check normal IC200 (BU4052)16PINVDD, 8PIN VSS power check -COM (IC100) 3, 6PIN Communication check Refer to SMPS Troubleshooting IC603 Pins2, 7, 8 check relevant parts replacement I

49、C801 (MC4580)4PIN VSS,8PIN VDD power check relevant parts replacement IC603 Pin4 SDout check Relevant Part repplacement YES YES YES YES YES YES YES YES YES NO NO NO NO NO NO - 2-8 - I TUNER FUNCTION CHECK Tuner module (TUN800) operation check I TAPE FUNCTION CHECK TUNER MODUEL power check (2PIN 9Vcheck) IC200 (BU4052)16PIN- VDD,8PIN VSS power check IC801(MC4580)4PIN VSS,8PIN VDD power check IC200 (BU4052)16PIN- VDD,8PIN VSS power check IC200(BU4052)1, 12PIN input waveform check IC200 (BU405