LG-XHT7650-cdr-sm 电路图 维修手册.pdf

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1、DVD/CD RECEIVER SERVICE MANUAL MODELS : XH-T9650X/XH-T7650X/LH-T7652IA/XH-TK9650Q/LH-T9656IA/LH-T760IASERVICE MANUAL MODELS : XH-T9650X/XH-T7650X/LH-T7652IA/ XH-TK9650Q/LH-T9656IA/LH-T760IA 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 SERVICE INFORMATION FOR EEPROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5 S

3、PECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6 SECTION 2. AUDIO PART AUDIO TROUBLESHOOTING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 WIRING DIAGRAM . . . . . . . . . . .

4、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4 BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6 CIRCUIT DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5、 . . . . . . . . . . . . . . . . . . . . 2-8 PRINTED CIRCUIT DIARGAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-32 SECTION 3. DVD & AMP PART ELECTRICAL TROUBLESHOOTING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1 DVD &

6、 AMP CIRCUIT DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-22 PRINTED CIRCUIT DIARGAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-30 SECTION 4. EXPLODED VIEWS . . . . . . . . . . . . . . . . . . . . . . .

7、. . . . . . . . . . . . . .4-1 SECTION 5. SPEAKER PART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1 SECTION 6. REPLACEMENT PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1 RadioFans.CN 收音机爱 好者资料库 1-2 SERVICING PRECAUTIONS NOTES REGARDING HAN

8、DLING 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 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

9、 be brought close to magnetic materials. 2) The pick-up should always be handled correctly and carefully, taking care to avoid external pressure 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) Ea

10、ch and every pick-up is already individually adjusted to a high degree of precision, and for that reason the 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 th

11、e 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 surface, 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

12、, 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. (Do not use any other liquid cleaners, because they will damage the lens.)

13、 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 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 s

14、wab Pressure Pressure SECTION 1. GENERAL RadioFans.CN 收音机爱 好者资料库 1-3 NOTES REGARDING COMPACT DISC PLAYER REPAIRS 1. Preparations 1) Compact disc players incorporate a great many ICs as well as the pick-up (laser diode). These components are sensitive to, and easily affected by, static electricity. I

15、f 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 composed of many optical components and other high-precision components. Care must be taken, therefore, to avoid repair or storage where the temperature

16、 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, first disconnect the power supply lead wire from the unit 2) All equipment, measuring instruments and tools must be grounded. 3) The workbench should

17、 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 is because there is the possibility of damage by static electricity.) 4) To prevent AC leakage, the metal part of the soldering iron should be grounde

18、d. 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 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

19、 the eyes or bare skin. Resistor (1 Mohm) Conductive Sheet Resistor (1 Mohm) Armband 1-4 ESD PRECAUTIONS Electrostatically Sensitive Devices (ESD) Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive Dev

20、ices (ESD). Examples of typical ESD devices are integrated circuits and some field-effect transistors and semiconductor chip components. The following techniques should be used to help reduce the incidence of component damage caused by static electricity. 1. Immediately before handling any semicondu

21、ctor 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 available discharging wrist strap device, which should be removed for potential shock reasons prior to applying power to

22、the unit under test. 2. After removing an electrical assembly equipped with ESD devices, place the assembly on a conductive surface 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.

23、 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 not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ESD devices. 6. Do not re

24、move 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 shorted together by conductive foam, aluminum foil or comparable conductive materials). 7. Immediately before removing th

25、e 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 : BE SURE NO POWER IS APPLIED TO THE CHASSIS OR CIRCUIT, AND OBSERVE ALL OTHER SAFETY PRECAUTIONS. 8. Minimize bodily mo

26、tions 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 floor can gener- ate static electricity sufficient to damage an ESD device). CAUTION. GRAPHIC SYMBOLS THE LIGHTNING FLASH

27、 WITH APROWHEAD SYMBOL. WITHIN AN EQUILATERAL TRIANGLE, IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF UNINSULATED “DANGEROUS VOLTAGE” THAT MAY BE OF SUFFICIENT MAGNITUDE TO CONSTITUTE A RISK OF ELECTRIC SHOCK. THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT

28、THE SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE LITERATURE. 1-5 SERVICE INFORMATION FOR EEPROM POWER ON DVD LOGO Status (NO Disk status) Remotecontrol Pause key-1-4-7-2 in order. Press number 09, Press charater AF (16 for a while) Use arrow key ( ) to move to appropr

29、ite position and make changes Press pause key once Change will be applied when power OFF-ON. * OPTION NTSC model doesnt have VCR option and use DVD option BF as VCR option. (only DVD exist) PAL model has another separate VCR option. (Both VCR and DVD exist) NAMEHEX OPT 100 OPT 200 OPT 300 OPT 400 OP

30、T 500 OPT 600 OPT 700 OPT 800 OPT 900 OPT A00 OPT B00 OPT C00 OPT D00 OPT E00 OPT F00 OPT G00 DETECT NEW EEPROM (OPTION EDIT SCREEN) 1-6 SPECIFICATIONS (* Depending on the sound mode settings and the source, there may be no sound output.) GENERAL Power supply Refer to main label Power consumption Re

31、fer to main label Net Weight 3.9 kg External dimensions (W x H x D)430 x 57 x 295 mm Operating conditions Temperature: 5C to 35C, Operation status: Horizontal Operating humidity 5% to 85% CD/DVD Laser Semiconductor laser, wavelength 650 nm Signal system PAL 625/50, NTSC 525/60 Frequency response (au

32、dio) 150 Hz to 18 kHz Signal-to-noise ratio (audio) More than 75 dB (1 kHz, NOP -6 dB, 20 kHz LPF/A-Filter) Dynamic range (audio) More than 70 dB Harmonic distortion (audio) 0.5 % (1 kHz, at 1W position) (20 kHz LPF) VIDEO Video output 1.0 V (p-p), 75 , negative sync., SCART (TO TV) TUNER FM Tuning

33、Range 87.5 - 108.0 MHz or 65.0 - 74.0 MHz, 87.5 - 108.0 MHz Intermediate Frequency 10.7 MHz Signal-to Noise Ratio 60 dB (Mono) Frequency Response 140 - 8,000 Hz AM MW Tuning Range 522 - 1,620 kHz or 520 - 1,720 kHz Intermediate Frequency 450 kHz AMPLIFIER(LH-T36s) Stereo mode 45W + 45W (Rated Output

34、 Power 30W, 4 at 1 kHz, THD 10 %) Surround mode Front: 45W + 45W (Rated Output Power 30W, THD 10 %) Center*: 45W Surround*: 45W + 45W(Rated Output Power 30W, 4 at 1 kHz, THD 10 %) Subwoofer*: 75W (Rated Output Power 60W, 8 at 30 Hz, THD 10 %) InputAUX IN OutputsMONITOR, PHONES: (32 , 1.0 V) SPEAKERS

35、(LHS-36SE) Front/Rear/Center SpeakerPassive Subwoofer (LHS-36SES) (LHS-36SEW) Type 1 Way 1 Speaker 1 Way 1 Speaker Impedance 4 8 Frequency Response 150 - 20,000 Hz 65 - 1,500 Hz Sound Pressure Level 85 dB/W (1m) 87 dB/W (1m) Rated Input Power 45 W 75 W Max. Input Power 90 W 150 W Net Dimensions (W x

36、 H x D) 105 x 99 x 83 mm 175 x 351 x 270 mm Net Weight 0.45kg 3.4kg 1-7 (* Depending on the sound mode settings and the source, there may be no sound output.) AMPLIFIER(LH-T76s) Stereo mode100W + 100W (Rated Output Power 100W, 4 at 1 kHz, THD 10 %) Surround modeFront: 100W + 100W (Rated Output Power

37、 100W, THD 10 %) Centre*: 100W Surround*: 100W + 100W (Rated Output Power 100W, 4 at 1 kHz, THD 10 %) Subwoofer*: 200W (Rated Output Power 150W, 3 at 30 Hz, THD 10 %) Inputs AV IN, MIC (OPTIONAL) Outputs S-VIDEO, MONITOR, PHONES: (32 , 1.0 V) SPEAKERS(LHS-76IB) Front/Rear SpeakerCenter speaker Passi

38、ve Subwoofer (XHS-76IBS) (XHS-76IBC) (XHS-76IBW) Type 2 Way 3 Speaker 2 Way 3 Speaker 1 Way 1 Speaker Impedance 4 4 3 Frequency Response 150 - 20,000 Hz 150 - 20,000 Hz 40 - 1,500 Hz Sound Pressure Level 88 dB/W (1m) 88 dB/W (1m) 85 dB/W (1m) Rated Input Power 100 W 100 W 200 W Max. Input Power 200

39、W 200 W 400 W Net Dimensions(W x H x D) 1300 x 320 mm495 x 83 x 90 mm 240 x 450 x 390 mm Net Weight 4.9kg 1.6kg 10.5kg SPEAKERS(LHS-76PA) Front SpeakerRear SpeakerCenter SpeakerPassive Subwoofer (LHS-76PAF)(LHS-76PAS)(LHS-76PAC)(LHS-76PAW) Type2 Way 3 Speaker1 Way 1 Speaker2 Way 3 Speaker1 Way 1 Spe

40、aker Impedance4 4 4 3 Frequency Response80 - 18000 Hz120 - 20000 Hz80 - 18000 Hz40 - 1,500 Hz Sound Pressure Level86 dB/W (1m)82 dB/W (1m)86 dB/W (1m)82 dB/W (1m) Rated Input Power100W100W100W200W Max. Input Power200W200W200W400W Net Dimensions (W x H x D)300 x1350 x300 mm 120 x248x96 mm500 x160 x15

41、5 mm240 x450 x390 mm Net Weight5.35 kg0.87 kg1.73 kg10.5 kg SPEAKERS(LHS-76SA) Front/Rear Speaker Center speaker Passive Subwoofer (LHS-76SAS)(LHS-76SAC)(LHS-76SAW) Type 1 Way 1 Speaker 1 Way 1 Speaker 1 Way 1 Speaker Impedance 4 4 3 Frequency Response 120 - 20,000 Hz 120 - 20,000 Hz 40 - 1,500 Hz S

42、ound Pressure Level 82 dB/W (1m) 83 dB/W (1m) 82 dB/W (1m) Rated Input Power 100 W 100 W 200 W Max. Input Power 200 W 200 W 400 W Net Dimensions (W x H x D)120 x 248 x 96 mm 300 x 115 x 96 mm 240 x 450 x 390 mm Net Weight 0.87kg 0.78kg 10.5kg 1-8 (* Depending on the sound mode settings and the sourc

43、e, there may be no sound output.) AMPLIFIER(LH-T96s) Stereo mode 155W + 155W (Rated Output Power 130W, 4 at 1 kHz, THD 10 %) Surround mode Front: 155W + 155W (Rated Output Power 130W, THD 10 %) Centre*: 155W Surround*: 155W + 155W (Rated Output Power 130W, 4 at 1 kHz, THD 10 %) Subwoofer*: 225W (Rat

44、ed Output Power 180W, 3 at 30 Hz, THD 10 %) Inputs AV IN OutputsS-VIDEO, MONITOR, PHONES: (32 , 1.0 V) SPEAKERS(LHS-96IA) Front/Rear Speaker Center speaker Passive Subwoofer (LHS-96IAS) (LHS-96IAC) (LHS-96IAW) Type 2 Way 3 Speaker 2 Way 3 Speaker 1 Way 1 Speaker Impedance 4 4 3 Frequency Response 80

45、 - 18,000 Hz 80 - 18,000 Hz 40 - 1,500 Hz Sound Pressure Level 86 dB/W (1m) 86 dB/W (1m) 82 dB/W (1m) Rated Input Power 155 W 155 W 225 W Max. Input Power 310 W 310 W 450 W Net Dimensions(W x H x D) 300 x 1350 x 300 mm 500 x 160 x 155 mm 240 x 450 x 390 mm Net Weight 5.35kg 1.73kg 10.5kg 2-1 SECTION

46、 2. AUDIO PART AUDIO TROUBLESHOOTING GUIDE 1. POWER SUPPLY CIRCUIT 2-2 2. FRONT CIRCUIT (1/2) PIN2 PIN1 PIN3 PIN12 : -22 FL+ : -41 VKK : -26.5 FL- : +5.0 P1301 Short 1pin of CN901 with 4pin of CN901 in SMPS part. CHECK IF THE P1301 IS OK? CHECK IF THE DIS301 IS OK? 2-3 3. FRONT CIRCUIT (2/2) CHECK I

47、F R345 R350, R154 OK. REPLACE R345 R350, R154. Check if the Remocon waceform of the P3101 pin 10 is OK Check if the RM301 voltage is OK(5V) Resoldering or Replace RM301 2-42-5 WIRING DIAGRAM 2-62-7 BLOCK DIAGRAM 2-82-9 CIRCUIT DIAGRAMS 1. SMPS(POWER) CIRCUIT DIAGRAM (1000W, LH-T96s) NOTES) Symbol de

48、notes AC ground. NOTES) Symbol denotes DC chassis ground. NOTE) Warning NOTE) Parts that are shaded are critical NOTE) With respect to risk of fire or NOTE) electricial shock. A 1 2 3 4 5 6 7 8 9 10 11 12 BCDEFGHIJKLMNOPQRST 2-102-11 2. SMPS(POWER) CIRCUIT DIAGRAM (700W, LH-T76s) A 1 2 3 4 5 6 7 8 9

49、 10 11 12 BCDEFGHIJKLMNOPQRST NOTES) Symbol denotes AC ground. NOTES) Symbol denotes DC chassis ground. NOTE) Warning NOTE) Parts that are shaded are critical NOTE) With respect to risk of fire or NOTE) electricial shock. 2-122-13 3. SMPS(POWER) CIRCUIT DIAGRAM (300W, LH-T36s) NOTES) Symbol denotes AC ground. NOTES) Symbol denotes DC chassis ground. NOTE) Warning NOTE) Parts that are shaded are critical NOTE) With respect to risk of fire or NOTE) electricial shock. A 1 2 3 4 5 6 7 8 9