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1、- 1-1 - CONTENTS SECTION 1. GENERAL SERVICING PRECAUTIONS.1-2 ESD PRECAUTIONS.1-4 SPECIFICATIONS.1-5 LOCATION OF CUSTOMER CONTROLS.1-6 SECTION 2. AUDIO PART ELECTRICAL TROUBLESHOOTING GUDIE.2-1 DVD PLAYER PROGRAM DOWNLOAD METHOD.2-5 WAVEFORMS OF MAJOR CHECK POINT.2-7 INTERNAL BLOCK DIAGRAM OF ICs.2-
2、8 IC VOLTAGE SHEET .2-10 BLOCK DIAGRAM.2-14 SCHEMATIC DIAGRAMS.2-16 PRINTED CIRCUIT DIARGAMS.2-28 SECTION 3. DVD PART ELECTRICAL TROUBLESHOOTING GUIDE .3-1 BLOCK DIAGRAMS.3-9 SCHEMATIC DIAGRAMS.3-13 WAVEFORMS.3-21 PRINTED CIRCUIT DIAGRAM.3-27 SECTION 4. MECHANSIM.4-1 SECTION 5. EXPLODED VIEWS.5-1 SE
3、CTION 6. SPEAKER PART.6-1 SECTION 7. REPLACEMENT PARTS LIST.7-1 RadioFans.CN 收音机爱 好者资料库 SECTION 1. GENERAL PART 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.
4、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 pressure an
5、d 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 installation scre
6、ws 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 surface, t
7、he 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 cotton swab should be used, taking care not to distort this. 6) Never attempt to disassemble the pick-up. Spring by excess pressure.
8、 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. - 1-2 - Storage in conductive bag
9、Drop impact NEVER look directly at the laser beam, and dont let contact fingers or other exposed skin. Magnet How to hold the pick-up aPressure Pressure Cotton swab Conductive Sheet RadioFans.CN 收音机爱 好者资料库 NOTES REGARDING COMPACT DISC PLAYER REPAIRS 1. Preparations 1) Compact disc players incorporat
10、e 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 man
11、y 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 magnetism is present, or where there is excessive dust. 2. Notes for repair 1) Before replacing a component part, first disconne
12、ct 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 ther
13、e 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 prevent sta
14、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. - 1-3 - Armband Conductive Sheet Resistor (1 Mohm) Resistor (1 Mohm) RadioFans.CN 收音机爱 好者资料库 ESD PRECAUTIONS Electrostatically Sensitive Devic
15、es (ESD) Some semiconductor (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. T
16、he 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 semiconductor-equipped assembly, drain off any electrostatic charge on your body by touching a known earth ground. Alter
17、natively, 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. After removing an electrical assembly equipped with ESD devices, place the assembly on a conductive surface such a
18、s 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-static solder removal device. Some solder removal devices not classified as anti-static can generate electrical charg
19、es 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 device from its protective package until immediately before you are ready to install it. (Most replacement ESD devi
20、ces are packaged with 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 wh
21、ich 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 unpackaged replacement ESD devices. (Otherwise harmless motion such as the brushing together of your clothes fabric or
22、the lifting of your foot from a carpeted floor can generate 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
23、 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 TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE LITERATURE. - 1-4 - - 1-5 - SPECIFICATIONS Power supplyAC 2
24、20240V, 50/60Hz Power consumption70W General Mass4.6kg External dimensions (W x H x D)360 x 72 x 350mm Operating conditionsTemperature: 5C to 35C, Operation status: Horizontal Operating humidity5% to 85% LaserSemiconductor laser, wavelength 650nm Signal systemPAL 625/50, NTSC 525/60 CD/DVD Frequency
25、 range(audio)4 Hz to 20 kHz Signal-to-noise ratio(audio)More than 75dB (1kHz, NOP, 20kHz LPF/A-Fiter) Dynamic range (audio)More than 75dB Harmonic distortion(audio)0.5% (1kHz, at 12Q position) (20kHz LPF/A-Filter) Video input1.0V (p-p), 75, negative sync., RCA jack VideoVideo output1.0V (p-p), 75, n
26、egative sync., RCA jack S-video output(Y) 1.0V (p-p), 75, negative sync., Mini DIN 4-pin x 1 (C) 0.3V (p-p), 75 Tuning Range87.5108MHz FM Intermediate Frequency10.7MHz Signal-to Noise Ratio60dB Frequency Response15010,000Hz AM(MW) Tuning Range5221, 611kHz Intermediate Frequency450kHz Stereo mode35W
27、+ 35W(8 at 1kHz, THD 10%) Surround modeFront: 50W+50W (THD 10%) Center*: 35W Surround*: 50W +50W(8 at 1Hz, THD 10%)35W Subwoofer*: 35W(8 at 30Hz, THD 1%) Amplifier InputsVIDEO 1, 2, OPTICAL AUDIO OutputsVIDEO 1(AUDIO OUT): 2V WOOFER: 2V Satellite Speaker(FE-3620TE)Passive Subwoofer(FE-3620WE) Type1
28、Way 1Speaker1Way 1Speaker Impedance88 Frequency Response11040,000Hz45 1,500Hz SpeakersSound Pressure Level83dB/W(1m)82 dB/W(1m) Rated Inut Power35W35W Max. Input Power70W70W Net dimensions(W x H x D)90 x 70 x 106.5mm160 x 350 x 325mm Net Weight0.65kg4.5kg Supplied Accessories Audio cable. 1 Speakers
29、 . 6 Remote control. 1 AM Ioop antenna. 1 Video cable. 1 Speaker cables. 5 Batteries (AAA). 2 FM antenna . 1 * Depending on the sound mode settings and the source, there may be no sound output. Tuner - 1-6 - LOCATION OF CUSTOMER CONTROLS FRONT PANEL DISPLAY WINDOW SOUND MODE INDICATOR ANGLE ICON IND
30、ICATOR DISC INDICATOR PLAY/PAUSE INDICATOR REC/RDS INDICATOR REPEAT PLAY BACK MODE INDICATOR TOTAL PLAYING TIME/ELAPSED TIME/FREQUENCY/DELAY TIME/VOLUME. INDICATORS SLEEP INDICATOR TUNED INDICATOR STEREO INDICATOR CD/DVD RECEIVERDA-3620 PHONES FM/AM PLAY/PAUSE FUNCTIONSTANDBY/ONTUNING/SKIP MEMORY ST
31、OP/CLEAR ENTERMONO/ST. OPEN/CLOSE OPEN/CLOSEDISC TRAY FUNCTION BUTTON MENU (MONO/STERO) BUTTON VOLUME CONTROLLER PHONE CONNECTOR TITLE (FM/AM) BUTTON ENTER BUTTON STOP (MEMORY /CLEAR) BUTTON SKIP/TUNE BUTTONS PALY/PAUSE BUTTON POWER BUTTON AND INDICATOR - 1-7 - REAR PANEL Y SPEAKER CONNECTORS VIDEO
32、SELECTOR SWITCH VIDEO1 (INPUT/OUT PUT) CONNECTORS S-VIDEO OUT CONNECTOR AM ANTENNA CONNECTOR FM75 COAXAL ANTENNA CONNECTOR S-VIDEO COMPONENT SWITCH VIDEO 2(INPUT) CONNECTOR WOOFER OUT CONNECTOR - 2-1 - SECTION 2. AUDIO PART ELECTRICAL TROUBLESHOOTING GUDIE Turn power on. Is power on? Does initial re
33、ad work? Does it play? Does it output audio? Check power supply circuit. Check laser circuit. Check focus circuit. Check disc. Check tracking servo circuit. Check audio circuit. OK YES YES YES YES NO NO NO NO 1. - 2-2 - 2. AUDIO . COM Circuit POWER ON Does CD/DVD appear at FLT? Does LOADING appear a
34、t FLD? Does it appear DVD Error at FLD? Does Video1/2 FM 87.5 appear at FLD? OK. Check Connector(PN103)if is normally. Reconnet it. Refer to SMPS Refer to oscillator Circuit. Check DVD Reset Waveform. Check IC101 Reset Wavefrom. Check 3.3V line. Check Power dection Circuit. Check power part of Main
35、B/D. Check oscillator of x101. Check if CN103 Pin is High. Check if IC101 Pin is High. Check if IC101 Pin , , , is high (5V). Check if IC101 Pin is High . Replace IC 101. Does no Dise or Time appear at FLD? Check if DVD an Audio Micom Interface is OK. Check power. Check DVD Module. Check SMPS. 17467
36、2 90 11 5 26 - 2-3 - 3. Front Circuit (1/2) POWER ON LED OFF. Is digitron on normally? Check if the PN101/PN102 is OK. Check if the Front power is OK(*1). Refer to SMPS Part. Reconnec it. Check if the VFD001 Pins are OK. Check Patten and Resoldering. Check if all Buttens are OK. Check if the Volume
37、is OK. Check if the Headphone is OK. Check if the Remocon is OK. Front B/D OK. * 1: PN101 Pins Pin 1: -32V Pin 8: -28V Pin 9: -32V Pin 20: 12V - 2-4 - Front Circuit (2/2) Check if the Power part of the Front is OK. Check if the Power part of the Front is OK. Check if R027R036 OK. Check if PN101 pin
38、12, 13 Waverfrom OK. Check if R023, R024 OK. Refer to Micom Circuit Refer to Micom Circuit. Refer to power(SMPS). Refer to power(SMPS). Refer to SMPS part. Refer to SMPS. Replace R027R036 Replace R023, R024. Check if the Power part of the Front is OK. Check if the Power Part of the Front is OK. Check if the RMC001Volume is OK (5V). Check if the Remocon waveform of the PN101 pin 11. Check if the PN101 pin19 is Low. Check if headphoneJack in JK001 is OK. R
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