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1、MODEL : HT302SD(SH32SD-S/SH32SD-W)SERVICE MANUAL P/NO : AFN31640725NOVEMBER, 2006 DVD/CD RECEIVER SERVICE MANUAL MODEL : HT302SD(SH32SD-S/SH32SD-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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-24 SECTION 3. DVD & AMP PART ELECTRICAL TROUBLESHOOTING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1 DVD & AMP CIRCUIT DIAGRAMS . . . . . . . .
6、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-23 SECTION 4. EXPLODED VIEWS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1 SECTION 5. SPEAKER PART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1 SECTION 6. REPLACEME
7、NT 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. Notes for transport and storage 1) The pick-up should always be left in its conductive bag until immediately prior to use. 2) The pi
8、ck-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 pressure and impact.
9、 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 installation screws should
10、 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 surface, the dust s
11、hould 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 cotton swab should be used, taking care not to distort this. 6) Never attempt to disassemble the pick-up. Spring by excess pressure. If the le
12、ns 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 bagDrop impact NEVER
13、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 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 incorp
14、orate 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 composed of
15、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, first dis
16、connect 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 is because
17、 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 preve
18、nt sta- tic 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. Resistor (1 Mohm) Conductive Sheet Resistor (1 Mohm) Armband 1-4 ESD PRECAUTIONS Electrostatically Sensitive Devices (ESD) Some semico
19、nductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive Devices (ESD). Examples of typical ESD devices are integrated circuits and some field-effect transistors and semiconductor chip components. The following techniq
20、ues should 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 off any electrostatic charge on your body by touching a known earth ground. Alternatively, obtain and
21、 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. After removing an electrical assembly equipped with ESD devices, place the assembly on a conductive surface such as aluminum foil, to
22、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-static can generate electrical charges sufficient to dam
23、age 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 device from its protective package until immediately before you are ready to install it. (Most replacement ESD devices are packaged wit
24、h leads electrically shorted 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
25、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 unpackaged replacement ESD devices. (Otherwise harmless motion such as the brushing together of your clothes fabric or the lifting of your
26、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.WITHIN AN EQUILATERAL TRIANGLE, IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF UNINSULATED “DANGEROUS VOLTAGE” THAT MAY
27、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 TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE LITERATURE. 1-5 SERVICE INFORMATION FOR EEPROM (DVD PART) POWER ON DVD LOGO St
28、atus (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 changes Press pause key once Change will be applied when power OFF-ON. NAME OPT 1 OPT 2 OPT 3 OPT 4 OPT 5 OPT 6 OPT 7 OPT 8 OP
29、T 9 OPT A OPT B OPT C OPT D OPT E OPT F OPT G HEX 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 DETECT NEW EEPROM (OPTION EDIT SCREEN) Refer to page 6-1 1-6 SERVICE INFORMATION FOR EEPROM (MICOM PART) POWER ON FLD no disc status Remotecontroller 2 + Front STOP push same timing during 5s FLD 00. Us
30、e arrow key ( ) move to appropriate position and make changes Press ENTER key once FLD write ok or up ok Remotecontroller 2 + Front STOP push same timing FLD display E2P CLR or EP CLR Auto power off NAMEHEX 0086 01C2 0210 0300 0400 DETECT NEW EEPROM (OPTION EDIT SCREEN) 1-7 SPECIFICATIONS GENERAL Po
31、wer supplyRefer to main label Power consumptionRefer to main label Net Weight2.4 kg External dimensions (W x H x D)360 x 63 x 307 mm Operating conditionsTemperature: 5C to 35C, Operation status: Horizontal Operating humidity5% to 85% CD/DVD LaserSemiconductor laser, wavelength 650 nm Signal systemPA
32、L 625/50, NTSC 525/60 Frequency response (audio)160 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 output1.0 V (p-p), 75 , negativ
33、e sync./ SCART (TO TV) COMPONENT VIDEO OUT(Y) 1.0 V (p-p), 75 ohms, negative sync, RCA jack x 1 (Pb)/(Pr) 0.7 V (p-p), 75 ohms, RCA jack x 1 TUNER FM Tuning Range87.5 - 108.0 MHz or 65.0 - 74.0 MHz, 87.5 - 108.0 MHz Intermediate Frequency10.7 MHz Signal-to Noise Ratio60 dB (Mono) Frequency Response1
34、60 - 8,000 Hz AM MW Tuning Range522 - 1,620 kHz or 520 - 1,720 kHz Intermediate Frequency450 kHz AMPLIFIER Stereo mode45W + 45W (Rated Output Power 30W, 4at 1 kHz, THD 10 %) Surround modeFront: 45W + 45W (Rated Output Power 30W, THD 10 %) Centre*: 45W Surround*: 45W + 45W (Rated Output Power 30W, 4a
35、t 1 kHz, THD 10 %) Subwoofer*: 75W (Rated Output Power 60W, 8at 30 Hz, THD 10 %) InputsAUX IN, MIC SPEAKERS Front/Center/Rear SpeakerPassive Subwoofer (SH32SD-S)(SH32SD-W) Type1 Way1 Speaker1 Way1 Speaker Impedance4 8 Frequency Response160 - 20,000Hz 65 - 1,500 Hz Sound Pressure Level84 dB/W (1m)87
36、dB/W (1m) Rated Input Power45 W75 W Max. Input Power90 W150 W Net Dimensions (W x H x D)98 x 101 x 105 mm181 x 351 x 278 mm Net Weight0.52kg3.4kg (* 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 SUPP
37、LY CIRCUIT 2-2 2. FRONT CIRCUIT (1/2) CHECK IF THE P1301 IS OK? CHECK IF THE RM301 IS OK? 2-3 3. FRONT CIRCUIT (2/2) CHECK IF R345 R350 OK. REPLACE R345 R350. Check if the Remocon waceform of the P3101 pin 11 is OK Check if the RM301 voltage is OK(5V) Resoldering or Replace RM301 2-42-5 WIRING DIAGR
38、AM 061026 2-62-7 BLOCK DIAGRAM 061026 061026 IMPORTANT SAFETY NOTICE WHEN SERVICING THIS CHASSIS, UNDER NO CIR- CUMSTANCES SHOULD THE ORIGINAL DESIGN BE MODIFIED OR ALTERED WITHOUT PERMISSION FROM THE LG CORPORA TION. ALL COMPONENTS SHOULD BE REPLACED ONLY WITH TYPES IDENTICAL TO THOSE IN THE ORIGIN
39、AL CIR- CUIT. SPECIALCOMPONENTS 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 THE SET IS NOT DELAYED UNTILTHE NEW SERVICE LITERAT
40、URE 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. NOTE) Warning NOTE) Parts that are shaded are critical NOTE) With respect to risk of fire or NOTE) electricial shock. NOT
41、ES) Symbol denotes AC ground. NOTES) Symbol denotes DC chassis ground. 2-82-9 CIRCUIT DIAGRAMS 1. SMPS(POWER) CIRCUIT DIAGRAM 2-102-11 2. -COM(MAIN) CIRCUIT DIAGRAM 061026 2-122-13 3. MOTOR & SERVO CIRCUIT DIAGRAM 061026 2-142-15 4. I/O CIRCUIT DIAGRAM 061026 2-162-17 5. MIC CIRCUIT DIAGRAM 061026 2
42、-182-19 6. FRONT JACK CIRCUIT DIAGRAM 061026 2-202-21 7. FRONT CIRCUIT DIAGRAM(WITH RDS) 061026 2-222-23 8. FRONT CIRCUIT DIAGRAM(WITHOUT RDS) 061026 2-242-25 PRINTED CIRCUIT BOARD DIAGRAMS 1. MAIN P.C. BOARD DIAGRAM ( TOP VIEW ) 2-262-27 2. MAIN P.C. BOARD DIAGRAM ( BOTTOM VIEW ) 2-282-29 3. SMPS P
43、.C. BOARD NOTE:Warning Parts that are shaded are critical With respect to risk of fire or electrical shock. 2-302-31 4. FRONT JACK P.C BOARD 5. FRONT P.C. BOARD(WITH RDS) 3-1 ELECTRICAL TROUBLESHOOTING GUIDE 1. System operation flow Power On No Yes Yes Yes No No No Show LOGO Tray Closed? Tray Close
44、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 have disc and disc type 2. Jump to related disc reading proc
45、edure SLED at Inner Side? 1. 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 PART Check the regulators or diode. 1. Check 27MHz system clock. 2. C
46、heck 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? (12V, 5.6V, 3.5V, 5V,7V, 34V) Are 3.5V and 5V DC outputs normal on main PCBA? Update FLASH
47、 successfully? Replace FLASH A 3-3 A ES8380 Check the related circuit of ES8380 IC501 Pins133, 134, 137, 138, 139, 140 Check the Tray control IO pins on ES8380. Check the Tray control amplifyung circuit IC401. Check connection lines between SDRAM(IC502) & ES8380 and the SDRAM is damaged. ES8381 VIDE
48、O 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 ES8380.
49、Check the laser power circuit on ES8380 and connecting to power transistor.(Q405, Q406) Collector voltage of power transistor is OK? (Q405, Q406) Proper RF signal on ES8380 Proper SPINDLE signal on ES8380 SPNP SPNN output properly? Check the related circuit on ES8380 RF signal. Check the RF connection between IP9009 and ES8380. 3-6 D Proper signals on A, B, C, D of ES8380 Proper CD-DVDCT signal on ES8380 Proper CD-DVDCT signal on ES8380 Proper TRACK signal on ES8380 TR+ & TR- output properly? Check
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