LG-HT552TH-sur-sm 电路图 维修手册.pdf

《LG-HT552TH-sur-sm 电路图 维修手册.pdf》由会员分享，可在线阅读，更多相关《LG-HT552TH-sur-sm 电路图 维修手册.pdf（62页珍藏版）》请在收音机爱好者资料库上搜索。

1、DVD/CD RECEIVER SERVICE MANUAL MODEL : HT552TH SH52TH-C, SH52TH-S, SH52TH-WSERVICE MANUAL P/NO : AFN31640733DECEMBER, 2006 MODEL : HT552TH SH52TH-C, SH52TH-S, SH52TH-W 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、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-28 SECTION 3. DVD & AMP PART ELECTRICAL TROUBLESHOOTING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1 DVD & AMP CIRCUIT DIAGRAMS

6、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-22 PRINTED CIRCUIT DIARGAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-28 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 m

9、agnetic 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 i

10、s 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 o

11、utput 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- to

12、n 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

13、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 swab Pressure Pressure

14、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. If such static electric

15、ity 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,

16、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 be covered with a con

17、ductive 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 b

18、e 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 o

20、f 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 semi

21、conductor-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-s

23、tatic 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

25、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 motions when handing unp

26、ackaged 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

28、TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE LITERATURE. 1-5 SERVICE INFORMATION FOR EEPROM(DVD PART) 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

29、 and make changes Press pause key once Change will be applied when power OFF-ON. NAMEHEX OPT 100 OPT 200 OPT 300 OPT 400 OPT 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) *Refer to page 6-1. 1-6 SERVICE INFORMATION

30、FOR EEPROM (AMP PART) POWER ON FLD no disc status Remotecontrol 2 + Front STOP push same timing during 5s FLD 00. Use arrow key ( ) move to appropriate position and make changes Press ENTER key once FLD write ok or up ok Remotecontrol 2 + Front STOP push same timing FLD display E2P CLR or EP CLR Aut

31、o power off NAMEHEX 0086 01FA 0223 0300 0400 DETECT NEW EEPROM (OPTION EDIT SCREEN) 1-7 SPECIFICATIONS GENERAL Power supply Refer to main label. Power consumption Refer to main label. Net Weight 3.6 kg External dimensions (W x H x D) 430 x 70 x 311 mm Operating conditions Temperature: 5C to 35C, Ope

32、ration status: Horizontal Operating humidity 5% to 85% Laser Semiconductor laser, wavelength 650 nm CD/DVD Signal system PAL 625/50, NTSC 525/60 Frequency response (audio) 200 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) Mor

33、e than 70 dB Harmonic distortion (audio) 0.5 % (1 kHz, at 1W position) (20 kHz LPF) VIDEO Video input 1.0 V (p-p), 75 , negative sync., RCA jack x 1 Video output 1.0 V (p-p), 75 , negative sync., RCA jack x 1/ SCART (TO TV) COMPONENT VIDEO OUT(Y) 1.0 V (p-p), 75 ohms, negative sync, RCA jack x 1 (PB

34、)/(PR) 0.7 V (p-p), 75 ohms, RCA jack x 1 TUNER FM Tuning 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

35、kHz AMPLIFIER Stereo mode 70 W + 70 W (4 at 1 kHz, THD 10 %) Surround mode Front: 70 W + 70 W (THD 10 %) Center*: 70 W Surround*: 70 W + 70 W (4 at 1 kHz, THD 10 %) Subwoofer*: 150 W (3 at 30 Hz, THD 10 %) Inputs AUDIO IN, OPTICAL IN Outputs MONITOR OUT, EURO AV (TO TV) OUT COMPONENT VIDEO OUT SPEAK

36、ERS Front/Rear Speaker Center speaker Passive Subwoofer (SH52TH-S)(SH52TH-C)(SH52TH-W) Type 2 Way 3 Speaker2 Way 3 Speaker1 Way 1 Speaker Impedance 4 4 3 Frequency Response 100 - 20000 Hz150 - 20000 Hz40 - 1500 Hz Sound Pressure Level 82 dB/W (1m)82 dB/W (1m)80 dB/W (1m) Rated Input Power 70 W70 W15

37、0 W Max. Input Power 140 W140 W300 W Net Dimensions(W x H x D) 260 x 1100 x 260 mm330 x 86 x 121 mm212 x 395 x 341 mm Net Weight 3.0 kg1.15 kg6.0 kg (* Depending on the sound mode settings and the source, there may be no sound output.) 2-1 SECTION 2. AUDIO PART AUDIO TROUBLESHOOTING GUIDE 1. POWER S

38、UPPLY CIRCUIT Insert power cord YES YES YES YES YES YES YES Turn power on. NO Check power plug and power supply circuit. NO Check power supply circuit. NO Check laser circuit. Check focus circuit. Check disc. NO NO Check tracking servo circuit. Check audio circuit. Does red power led turn on? Is pow

39、er on? Does initial read work? Does it play? Does it output audio? OK 2-2 2. FRONT CIRCUIT (1/2) YES YESYES YES YES YES YES NONO Reconnect it. (Refer to notice *1) Tuner off the red led?Check if the PN301 is ok? NO NO NO Refer to smps part. Check pattern and resoldering Is digitron on normally? Chec

40、k if all buttons are ok? Check if the front power is ok?(*2) Check if the DIS301 is ok? NO 1 Check if the remotecontrol is ok? NO 2 Power on. Front b/d ok. *1 : When it is needed to reconnected FFC cable into PN301 Short 1pin of PN103 with 18pin of CN901 in amp part *2 : PN603 Pins. PIN1 : -35 VKK P

41、IN2 : -30 FL+ PIN3 : -33 FL- PIN7 : +5V PIN13 : +5VA 2-3 3. FRONT CIRCUIT (2/2) YES YES YES NO Reffer to power(SMPS). NO Replack R345 R350, R154. Check if the power part of the front is ok? Check if R345R350, R150 ok? Refer to micom circuit. 1 YES YES YES NO Reffer to power(SMPS). NO Reffer to micom

42、 circuit. NO Check rm circuit Check if the power part of the front is ok? Check if the remotecontrol waveform of the PN301 pin11 is ok? Check if the RC2 voltage is ok(5V)? YES Resoldering or replace RC2. 2 2-42-5 WIRING DIAGRAM FAN VOLUME DC ACK MD SMPS PCB FRONT PCB VFD AMP PCB SPEAKER TERMINAL MAI

43、N PCB HDMI JACK SCART JACKAV JACK COMPONENT S/W OPTICAL IN HEAT SINK PN602 PN203 PN601 CN602 PN603 PN202 PN206 PN302 PN2026630R-FB05K 6630XE00111 PN204 11PIN MIC1 CN301 EAD35219301 MIC2 USB STEREO PN301 PN103 P4401 6630XE00123 23PIN CN902CN901 P4402 6630XE00109 3PIN 15PIN 9PIN 14PIN TUNER KEY PCB 56

44、1-711O 6630XE00120 6630XE001206630XE00124 EAD35214501 EAD35219501 561-715N 561-661B 6630XE01224 6630XE00118 561-711C 6630R-FB05R CABLE3 EAD35201502 CABLE1 EAD35201101 CABLE4 EAD35201302 CABLE2 EAD35632101 EAD35214501 EAD35219501 2-62-7 BLOCK DIAGRAM IC508 PORTA BLE IC204 AK5358 ADC IC203 NJM4580 OPA

45、MP DVD_DI DVD_CLK DVD_CE DVD_DO IC501 IP9009A IC601 TAS5152 TAS5152 TAS5152 TAS5152 FL FR WF C RL RR 2-82-9 CIRCUIT DIAGRAMS 1. SMPS(POWER) CIRCUIT DIAGRAM 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) P

46、arts that are shaded are critical NOTE) With respect to risk of fire or NOTE) electricial shock. IMPORTANT SAFETY NOTICE WHEN SERVICING THIS CHASSIS, UNDER NO CIR- CUMSTANCES SHOULD THE ORIGINAL DESIGN BE MODIFIED OR ALTERED WITHOUT PERMISSION FROM THE LG CORPORATION. ALL COMPONENTS SHOULD BE REPLAC

47、ED ONLY WITH TYPES IDENTI- CAL TO THOSE IN THE ORIGINAL CIRCUIT. SPECIAL COMPONENTS ARE SHADED ON THE SCHEMATIC FOR EASY IDENTIFICATION. THIS CIRCUIT DIAGRAM MAY OCCASIONALLY DIF- FER FROM THE ACTUAL CIRCUIT USED. THIS WAY, IMPLEMENTATION OF THE LATEST SAFETY AND PERFORMANCE IMPROVEMENT CHANGES INTO

48、 THE SET IS NOT DELAYED UNTILTHE NEW SERVICE LITERATURE IS PRINTED. NOTE : 1. Shaded( ) parts are critical for safety. Replace only with specified part number. 2. Voltages are DC-measured with a digital voltmeter during Play mode. 2-102-11 2. POWER INTERFACE CIRCUIT DIAGRAM A 1 2 3 4 5 6 7 8 9 10 11

49、 12 BCDEFGHIJKLMNOPQRST 2-122-13 3. -COM(MAIN) CIRCUIT DIAGRAM A 1 2 3 4 5 6 7 8 9 10 11 12 BCDEFGHIJKLMNOPQRST 2-142-15 4. SERVO CIRCUIT DIAGRAM A 1 2 3 4 5 6 7 8 9 10 11 12 BCDEFGHIJKLMNOPQRST 2-162-17 5. I/O CIRCUIT DIAGRAM A 1 2 3 4 5 6 7 8 9 10 11 12 BCDEFGHIJKLMNOPQRST 2-182-19 6. MIC & USB & PTB CIRCUIT DIAGRAM A 1 2 3 4 5 6 7 8 9 10 11 12 BCDEFGHIJKLMNOPQRST 2-202-21 7. POWER KEY CIRCUIT DIAGRAM A 1 2 3 4 5 6 7 8 9 10 11 12 BCDEFGHIJKLMNOPQRST 2-222-23 8. TIMER CIRCUIT DIAGRAM A 1 2 3 4 5 6 7 8 9