Zenith-ZDA311-dvd-sm电路图 维修手册.pdf

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1、SERVICE MANUAL Product Type: DVD VIDEO PLAYER Chassis: DP9 (MD) Manual Series: ZDA-311 Manual Part #: 3829RHN004T Model Line: D Product Year: 2005 Summary 1 Cabinet CONNECT A 1500 OHM 10 WATT RESIS- TOR, PARALLELED BY A .15 MFD. 150.V A.C TYPE CAPACITOR BETWEEN A KNOWN GOOD EARTH GROUND (WATER PIPE,

2、 CON- DUIT, ETC.) AND THE EXPOSED METALLIC PARTS, ONE AT A TIME. MEASURE THE A.C. VOLTAGE ACROSS THE COMBINATION OF 1500 OHM RESISTOR AND .15 MFD CAPACITOR. REVERSE THE A.C. PLUG AND REPEAT A.C. VOLTAGE MEASUREMENTS FOR EACH EXPOSED METALLIC PART. VOLTAGE MEASURED MUST NOT EXCEED 75 VOLTS R.M.S. THI

3、S CORRESPONDS TO 0.5 MILLIAMP A.C ANY VALUE EXCEEDING THIS LIMIT CONSTITUTES A POTENTIAL SHOCK HAZARD AND MUST BE CORRECTED IMMEDIATELY. SUBJECT: GRAPHIC SYMBOLS THE LIGHTNING FLASH WITH APROWHEAD SYMBOL. WITHIN AN EQUILATERAL TRIANGLE, IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF U

4、NINSULATED “DANGEROUS VOLTAGE” THAT MAY BE OF SUFFICIENT MAG- NITUDE TO CONSTITUTE A RISK OF ELECTRIC SHOCK. THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIAN- GLE IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE LITERATURE. SUBJECT : X-RADIATION

5、1. BE SURE PROCEDURES AND INSTRUCTIONS TO ALL SERVICE PER- SONNEL COVER THE SUBJECT OF X-RADIATION. THE ONLY POTEN- TIAL SOURCE OF X-RAYS IN CURRENT T.V. RECEIVERS IS THE PIC- TURE TUBE. HOWEVER, THIS TUBE DOES NOT EMIT X-RAYS WHEN THE HIGH VOLTAGE IS AT THE FACTORY SPECIFIED LEVEL. THE PROPER VALUE

6、 IS GIVEN IN THE APPLICABLE SCHEMATIC. OPERA- TION AT HIGHER VOLTAGES MAY CAUSE A FAILURE OF THE PIC- TURE TUBE OR HIGH VOLTAGE SUPPLY AND, UNDER CERTAIN CIR- CUMSTANCES, MAY PRODUCE RADIATION IN EXCESS OF DESIR- ABLE LEVELS. 2. ONLY FACTORY SPECIFIED C.R.T. ANODE CONNECTORS MUST BE USED. DEGAUSSING

7、 SHIELDS ALSO SERVE AS X-RAY SHIELD IN COLOR SETS, ALWAYS RE-INSTALL THEM. 3. IT IS ESSNTIAL THAT SERVICE PERSONNEL HAVE AVAILABLE AN ACCURATE AND RELIABLE HIGH VOLTAGE METER. THE CALIBRA TION OF THE METER SHOULD BE CHECKED PERIODICALLY AGAINST A REFERENCE STANDARD, SUCH AS THE ONE AVAILABLE AT YOUR

8、 DISTRIBUTOR. 4. WHEN THE HIGH VOLTAGE CIRCUITRY IS OPERATING PROPERLY THERE IS NO POSSIBILITY OF AN X-RADIATION PROBLEM. EVERY TIME A COLOR CHASSIS IS SERVICED. THE BRIGHTNESS SHOULD BE RUN UP AND DOWN WHILE MONITORING THE HIGH VOLTAGE WITH A METER TO BE CERTAIN THAT THE HIGH VOLTAGE DOES NOT EXCEE

9、D THE SPECIFIED VALUE AND THAT IT IS REGULATING CORRECTLY, WE SUGGEST THAT YOU AND YOUR SERVICE ORGA- NIZATION REVIEW TEST PROCEDURES SO THAT VOLTAGE REGU- LATION IS ALWAYS CHECKED AS A STANDARD SERVICING PROCE- DURE. AND THAT THE HIGH VOLTAGE READING BE RECORDER ON EACH CUSTOMERS INVOICE. 5. WHEN T

10、ROUBLESHOOTING AND MAKING TEST MEASUREMENTS IN A PRODUCT WITH A PROBLEM OF EXCESSIVE HIGH VOLTAGE, AVOID BEING UNNECESSARILY CLOSE TO THE PICTURE TUBE AND THE HIGH VOLTAGE SUPPLY. DO NOT OPERATE THE PRODUCT LONGER THAN IS NECESSARY TO LOCATE THE CAUSE OF EXCES SIVE VOLTAGE. 6. REFER TO HV. B+ AND SH

11、UTDOWN ADJUSTMENT PROCEDURES DESCRIBED IN THE APPROPRIATE SCHEMATIC AND DIAGRAMS (WHERE USED). SUBJECT: IMPLOSION 1. ALL DIRECT VIEWED PICTURE TUBES ARE EQUIPPED WITH AN INTE GRAL IMPLOSION PROTECTION SYSTEM, BUT CARE SHOULD BE TAKEN TO AVOID DAMAGE DURING INSTALLATION, AVOID SCRATCHING THE TUBE. IF

12、 SCRATCHED REPLACE IT. 2. USE ONLY RECOMMENDED FACTORY REPLACEMENT TUBES. SUBJECT : TIPS ON PROPER INSTALLATION 1. NEVER INSTALL ANY PRODUCT IN A CLOSED-IN RECESS, CUBBY- HOLE OR CLOSELY FITTING SHELF SPACE. OVER OR CLOSE TO HEAT DUCT, OR IN THE PATH OF HEATED AIR FLOW. 2. AVOID CONDITIONS OF HIGH H

13、UMIDITY SUCH AS: OUTDOOR PATIO INSTALLATIONS WHERE DEW IS A FACTOR, NEAR STEAM RADIA- TORS WHERE STEAM LEAKAGE IS A FACTOR, ETC. 3. AVOID PALCEMENT WHERE DRAPERIES MAY OBSTRUCT REAR VENTING. THE CUSTOMER SHOULD ALSO AVOID THE USE OF DEC- ORATIVE SCARVES OR OTHER COVERINGS WHICH MIGHT OBSTRUCT VENTIL

14、ATION. 4. WALL AND SHELF MOUNTED INSTALLATIONS USING A COMMER- CIAL MOUNTING KIT. MUST FOLLOW THE FACTORY APPROVED MOUNTING INSTRUCTIONS A PRODUCT MOUNTED TO A SHELF OR PLATFORM MUST RETAIN ITS ORIGINAL FEET (OR THE EQUIVALENT THICKNESS IN SPACERS) TO PROVIDE ADEQUATE AIR FLOW ACROSS THE BOTTOM, BOL

15、TS OR SCREWS USED FOR FASTENERS MUST NOT TOUCH ANY PARTS OR WIRING. PERFORM LEAKAGE TEST ON CUSTOMIZED INSTALLATIONS. 5. CAUTION CUSTOMERS AGAINST THE MOUNTING OF A PRODUCT ON SLOPING SHELF OR A TILTED POSITION, UNLESS THE PRODUCT IS PROPERLY SECURED. 6. A PRODUCT ON A ROLL-ABOUT CART SHOULD BE STAB

16、LE ON ITS MOUNTING TO THE CART. CAUTION THE CUSTOMER ON THE HAZ- ARDS OF TRYING TO ROLL A CART WITH SMALL CASTERS ACROSS THRESHOLDS OR DEEP PILE CARPETS. 7. CAUTION CUSTOMERS AGAINST THE USE OF A CART OR STAND WHICH HAS NOT BEEN LISTED BY UNDERWRITERS LABORATORIES, INC. FOR USE WITH THEIR SPECIFIC M

17、ODEL OF TELEVISION RECEIVER OR GENERICALLY APPROVED FOR USE WITH T.V.S OF THE SAME OR LARGER SCREEN SIZE. 8. CAUTION CUSTOMERS AGAINST THE USE OF EXTENSION CORDS, EXPLAIN THAT A FOREST OF EXTENSIONS SPROUTING FROM A SIN- GLE OUTLET CAN LEAD TO DISASTROUS CONSEQUENCES TO HOME AND FAMILY. PRODUCT SAFE

18、TY SERVICING GUIDELINES FOR VIDEO PRODUCTS A.C. VOLTMETER GOOD EARTH GROUND SUCH AS THE WATER PIPE. CONDUIT. ETC PLACE THIS PROBE ON EACH EXPOSED METAL PART 1-4 SERVICING PRECAUTIONS CAUTION : Before servicing the DVD covered by this service data and its supplements and addends, read and follow the

19、SAFETY PRECAUTIONS. NOTE : if unforeseen circum- stances create conflict between the following servicing pre- cautions and any of the safety precautions in this publica- tions, always follow the safety precautions. Remembers Safety First: General Servicing Precautions 1. Always unplug the DVD AC pow

20、er cord from the AC power source before: (1)Removing or reinstalling any component, circuit board, module, or any other assembly. (2)Disconnection or reconnecting any internal electrical plug or other electrical connection. (3)Connecting a test substitute in parallel with an elec- trolytic capacitor

21、. Caution : A wrong part substitution or incorrect polarity installation of electrolytic capacitors may result in an explosion hazard. 2. Do not spray chemicals on or near this DVD or any of its assemblies. 3. Unless specified otherwise in this service data, clean electrical contacts by applying an

22、appropriate contact cleaning solution to the contacts with a pipe cleaner, cotton-tipped swab, or comparable soft applicator. Unless specified otherwise in this service data, lubrication of contacts is not required. 4. Do not defeat any plug/socket B+ voltage interlocks with whitch instruments cover

23、ed by this service manual might be equipped. 5. Do not apply AC power to this DVD and/or any of its electrical assemblies unless all solid-state device heat sinks are cerrectly installed. 6. Always connect test instrument ground lead to the appropriate ground before connection the test instrument po

24、sitive lead. Always remove the test instrument ground lead last. Insulation Checking Procedure Disconnect the attachment plug from the AC outlet and turn the power on. Connect an insulation resistance meter(500V) to the blades of the attachment plug. The insulation resis- tance between each blade of

25、 the attachment plug and acces- sible conductive parts (Note 1) should be more than 1M- ohm. Note 1 : Accessible Conductive Parts including Metal pan- els, Input terminals, Earphone jacks, etc. Electrostatically Sensitive (ES) Devices Some semiconductor (solid state) devices can be damaged easily by

26、 static electricity. Such components commonly are called Electrostatically Sensitive (ES) Devices. Examples of typical ES 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 compo

27、nent damage caused by static electricity. 1. Immediately before handling any semiconductor compo- nent or semiconductor-equipped assembly, drain off any electrostatic charge on your body by touching a known earth ground. Alternatively, obtain and wear a commer- cially available discharging wrist str

28、ap 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 ES devices, place the assembly on a conductive surface such as aluminum foil, to prevent electrostatic charge buildup or exposure of t

29、he assembly. 3. Use only a grouned-tip soldering iron to solder or unsolder ES devices. 4. Use only an anti-static solder removal device. Some solder removal devices not classified a “anti-static” can generate electrical charges sufficient to damage ES devices. 5. Do not use freon-propelled chemical

30、s. These can generate electrical charge sufficient to damage ES devices. 6. Do not remove a replacement ES device from its protec tive package until immediately before you are ready to install it. (Most replacement ES devices are packaged with leads electrically shorted together by conductive foam,

31、aluminum foil, or comparable conductive material). 7. Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material to the chassis or circuit assembly into which the device will be installed. Caution : Be sure no power is applied to the

32、chassis or circuit, and observe all other safety precautions. 8. Minimize bodily motions when handling unpackaged replacement ES devices. (Normally harmless motion such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static elec- tricity

33、 sufficient to damage an ES device.) 1-5 SPECIFICATIONS GENERAL Power requirements: AC 120 V , 60 Hz Power consumption: 8W Dimensions (Approx.):360 x 35 x 242 mm (W x H x D) without foot Weight (Approx.): 1.7 kg Operating temperature:5 C to 35 C (41 F to 95 F) Operating humidity: 5 % to 90 % OUTPUTS

34、 VIDEO OUT:1 Vp-p 75 , sync negative, RCA jack x 1 COMPONENT VIDEO OUT:(Y) 1.0 V (p-p), 75 ,negative sync, RCA jack x 1 (Pb)/(Pr) 0.7 V (p-p), 75 , RCA jack x 2 AUDIO OUT:2.0 Vrms (1 KHz, 0 dB), 600 , RCA jack (L, R) x 1 DIGITAL OUT (COAXIAL):0.5 V (p-p), 75 , RCA jack x 1 SYSTEM Laser:Semiconductor

35、 laser, wavelength 650 nm Signal system: PAL / NTSC Frequency response:DVD (PCM 96 kHz): 8 Hz to 44 kHz DVD (PCM 48 kHz): 8 Hz to 22 kHz CD: 8 Hz to 20 kHz Signal-to-noise ratio:More than 100 dB (ANALOG OUT connectors only) Harmonic distortion: Less than 0.02% Dynamic range:More than 95 dB (DVD/CD)

36、2-1 SECTION 2 CABINET & MAIN CHASSIS CONTENTS EXPLODED VIEWS.2-2 1. Cabinet and Main Frame Section.2-2 2. Deck Mechanism Section(DP-9).2-3 3. Packing Accessory Section.2-4 2-2 EXPLODED VIEWS 1. Cabinet and Main Frame Section 463 A00 283 463 463 250 463 463 A48 5.1CH Model ONLY A47 A46 463 465 A44 26

37、0 261 280 A43 A42 A49 452 452 261 467 320 300 A 5 4 3 2 1 BCD 2. Deck Mechanism Section(DP-9) 2-3 A00 439 014 018 001 002 003 A01 A02 020 013 017 012 435 015 019 026 A03 036 021 430 438 035 025 024 010 431 435 012A 035A 012A 015A 015B 432 030 016 440 012 2-4 3. Packing Accessory Section BATTERY808 A

38、C ADAPTOR823 PACKING SHEET804 PACKING OPTIONAL PARTS 803 806 820 OWNERS MANUAL RF CABLE 810 CABLE SET ASSY 801 REMOCON900 BOX CARTON802 PACKING803 811 812 PLUG ASSY 1WAY(YELLOW) PLUG ASSY 1WAY(BLACK) PLUG ASSY 2WAY 3-1 SECTION 3 ELECTRICAL CONTENTS ELECTRICAL TROUBLESHOOTING GUIDE.3-2 1. Power check

39、 flow.3-2 2. System operation flow .3-3 3. Test & debug flow.3-4 DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING.3-10 1. SYSTEM 27MHz CLOCK, RESET, FLASH R/W SIGNAL.3-10 2. SDRAM CLOCK.3-12 3. TRAY OPEN/CLOSE SIGNAL.3-12 4. SLED CONTROL RELATED SIGNAL(NO DISC CONDITION).3-13 5. LENS CONTROL RELAT

40、ED SIGNAL(NO DISC CONDITION).3-13 6. LASER POWER CONTROL RELATED SIGNAL(NO DISC CONDITION).3-14 7. DISC TYPE JUDGEMENT WAVEFORM.3-14 8. FOCUS ON WAVEFORM.3-16 9. SPINDLE CONTROL WAVEFORM(NO DISC CONDITION.3-17 10. TRACKING CONTROL RELATED SIGNAL(System checking).3-18 11. MT1389D AUDIO OPTICAL AND CO

41、AXIAL OUTPUT (SPDIF).3-19 12. MT1389D VIDEO OUTPUT WAVEFORM.3-19 13. AUDIO OUTPUT FROM AUDIO DAC .3-20 BLOCK DIAGRAMS.3-21 1. Overall Block Diagram .3-21 2. Power(SMPS) Block Diagram.3-22 3. SERVO Block Diagram.3-23 4. MPEG & MEMORY Block Diagram.3-24 5. VIDEO & AUDIO Block Diagram.3-25 CIRCUIT DIAGRAMS.3-26 1. Power(SMPS) Circuit DIAGRAM.3-26 2. AV/JACK Circuit DIAGRAM.3-28 3. SYSTEM Circuit DIAGRAM .