LG-LHT361SE-cdr-sm 电路图 维修手册.pdf

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1、DVD/CD RECEIVER SERVICE MANUAL MODELS : LH-T360SE/LH-T3602SE/LH-T3600SE/LH-T361SE/LH-T360XSERVICE MANUAL MODELS : LH-T360SE/LH-T3602SE/LH-T3600SE/ LH-T361SE/LH-T3630X 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 SPECIFICATIONS . . . . .

3、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .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 & AMP CIRCUIT DIAGRAMS .

6、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .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 HANDLING OF THE PICK-UP 1.

8、 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 be brought close to ma

9、gnetic 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) Each and every pick-up is

10、 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 the power to the laser ou

11、tput 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, therefore, a cot- ton

12、 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.) Take care not to use t

13、oo 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 swab Pressure Pressure S

14、ECTION 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. If such static electrici

15、ty 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 of humidity is high, w

16、here 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 be covered with a cond

17、uctive 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 grounded. 5) Workers should be

18、 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 the eyes or bare skin.

19、 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 Devices (ESD). Examples of

20、 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 semiconductor component or semic

21、onductor-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 the unit under test. 2.

22、 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. 4. Use only an anti-st

23、atic 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 remove a replacement ESD

24、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 the protective material f

25、rom 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 motions when handing unpa

26、ckaged 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 WITH APROWHEAD SYMBOL.

27、 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 THE SERVICE PERSONNEL T

28、O 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 approprite position and make c

29、hanges 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 OPT 500 OPT 600 OPT 700 O

30、PT 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 Refer to main label Net W

31、eight 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 (audio) 150 Hz to 18 kHz S

32、ignal-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 Range 87.5 - 108.0 MHz

33、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 Power 30W, 4 at 1 kHz,

34、 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(LHS-36SE) Front/Rear/C

35、enter 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 H x D) 105 x 99 x 83 m

36、m 175 x 351 x 270 mm Net Weight 0.45kg 3.4kg 2-1 SECTION 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

37、 IF THE DIS301 IS OK? 2-3 3. FRONT CIRCUIT (2/2) CHECK IF 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(

38、POWER) CIRCUIT DIAGRAM (1000W, LH-T96s) 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 10 11 12 BCDEFGHIJKLMNOPQRST 2-102-11 2. SMPS(PO

39、WER) CIRCUIT DIAGRAM (700W, LH-T76s) A 1 2 3 4 5 6 7 8 9 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

40、) 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 10 11 12 BCDEFGHIJKLMNOPQRST 2-142-15 4. POWER INTERFA

41、CE CIRCUIT DIAGRAM A 1 2 3 4 5 6 7 8 9 10 11 12 BCDEFGHIJKLMNOPQRST 2-162-17 5. -COM(MAIN) CIRCUIT DIAGRAM A 1 2 3 4 5 6 7 8 9 10 11 12 BCDEFGHIJKLMNOPQRST 2-182-19 6. SERVO CIRCUIT DIAGRAM A 1 2 3 4 5 6 7 8 9 10 11 12 BCDEFGHIJKLMNOPQRST 2-202-21 7. I/O CIRCUIT DIAGRAM A 1 2 3 4 5 6 7 8 9 10 11 12

42、BCDEFGHIJKLMNOPQRST 2-222-23 8. MIC CIRCUIT DIAGRAM A 1 2 3 4 5 6 7 8 9 10 11 12 BCDEFGHIJKLMNOPQRST 2-242-25 9. USB CIRCUIT DIAGRAM A 1 2 3 4 5 6 7 8 9 10 11 12 BCDEFGHIJKLMNOPQRST 2-262-27 10. MIC & USB CIRCUIT DIAGRAM A 1 2 3 4 5 6 7 8 9 10 11 12 BCDEFGHIJKLMNOPQRST 2-282-29 11. HDMI CIRCUIT DIAG

43、RAM(OPTIONAL PART) A 1 2 3 4 5 6 7 8 9 10 11 12 BCDEFGHIJKLMNOPQRST 2-302-31 12. FRONT CIRCUIT DIAGRAM A 1 2 3 4 5 6 7 8 9 10 11 12 BCDEFGHIJKLMNOPQRST 2-322-33 PRINTED CIRCUIT BOARD DIAGRAMS 1. MAIN P.C. BOARD DIAGRAM ( TOP VIEW ) 2-342-35 2. MAIN P.C. BOARD DIAGRAM ( BOTTOM VIEW ) 2-362-37 3. SMPS

44、 P.C. BOARD (1000W, LH-T96S) ( TOP VIEW ) ( BOTTOM VIEW ) 5. SMPS P.C. BOARD (300W, LH-T36S) 4. SMPS P.C. BOARD (700W, LH-T76S) 2-382-39 6. KEY P.C. BOARD 7. TIMER P.C. BOARD ( BOTTOM VIEW ) ( TOP VIEW ) ( TOP VIEW )( BOTTOM VIEW ) 3-1 ELECTRICAL TROUBLESHOOTING GUIDE 1. System operation flow Power

45、On No Yes Yes Yes No No No Show LOGO Tray Closed? Tray Close to Closed position SLED Moves to Inner Position Recieve OPEN/ CLOSE Key? Receive CLOSE Key? 1. Stop Playback & Open Tray 2. Display tray open message & LOGO 1. Execute Pressed Key & IR Key 2. Systemoperati on Routi ne Loop 1. Judge whether

46、 have disc and disc type 2. Jump to related disc reading procedure SLED at Inner Side? 1. 8082 initializes SERVO, DSP & RISC registers 2. Write RISC code to SDRAM 3. Reset RISC SECTION 3. DVD & AMP PART 3-2 2. Test & debug flow TEST Check the POWER PART No Yes No Yes No No Yes Yes Check the POWER PA

47、RT Check the regulators or diode. 1. Check 27MHz system clock. 2. Check systemreset circuit. 3. Check FLASH R/Wenable signal PRD, RWR. 4. Check FLASH Memory related circuit. Check the AC Vol tage Power PCBA (110V or 220V) Switch on the Power PCBA Is the DC Voltage outputs OK? (-41V, -22V, -26.5V, 12

48、V, 5.6V, 3.3V, 5V, 7V, 32.5V) Are 3.3V and 5V DC outputs normal on main PCBA? Update FLASH successfully? Replace FLASH A 3-3 A ES8381 Check the related circuit of ES8381 IC501 Pins133, 134, 137, 138, 139, 140 Check the Tray control IO pins on ES8381. Check the Tray control amplifyung circuit IC401.

49、Check connection lines between SDRAM(IC502) & ES8381 and the SDRAM is damaged. ES8381 VIDEO outputs properly? Normal OPEN_SW, CLOSE_SW signal? 3-4 B Motor Driver DRV_MUTE pin is High? Motor Driver DRV_MUTE pin is High? SLED+ and SLED- output properly? Check the connection line of DRV_MUTE Check the related circuit of SLEGN Check Focus connection on ES8381 and motor driver. 3-5 C ES8381. Check the laser power circuit on ES8381 and connecting to power transistor.(Q405,