Philips-DVP-3304-V-Service-Manual(1) 电路图 维修手册.pdf

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1、S Se er rv vi ic ce e S Se er rv vi ic ce e Service Service Manual SECTION 1 SUMMARY1-1 PRODUCT SAFETY SERVICING GUIDELINES FOR VCR+DVD COMBO PRODUCTS1-3 SERVICING PRECAUTIONS1-4 SERVICE INFORMATION FOR EEPROM1-5 SPECIFICATIONS1-6 SECTION 2 CABINET CONNECTA1500 OHM 10 WATTRESISTOR, PARALLELED BYA.15

2、 MFD. 150.V A.C TYPE CAPACITOR BETWEEN A KNOWN GOOD EARTH GROUND (WATER PIPE, CONDUIT, ETC.) AND THE EXPOSED METALLIC PARTS, ONE ATATIME. MEASURE THE A.C. VOLTAGE ACROSS THE COMBI- NATION OF 1500 OHM RESISTOR AND .15 MFD CAPACITOR. REVERSE THE A.C. PLUG AND REPEATA.C. VOLTAGE MEASUREMENTS FOR EACH E

3、XPOSED METALLIC PART. VOLTAGE MEASURED MUST NOT EXCEED 75 VOLTS R.M.S. THIS CORRESPONDS TO 0.5 MILLIAMP A.C ANY VALUE EXCEEDING THIS LIMIT CONSTITUTES A POTENTIAL SHOCK HAZARD AND MUSTBE CORRECTED IMMEDIATELY. SUBJECT: GRAPHIC SYMBOLS THE LIGHTNING FLASH WITH APROWHEAD SYMBOL. WITHIN AN EQUI- LATERA

4、LTRIANGLE, IS INTENDED TO ALERTTHE SERVICE PERSONNEL TO THE PRESENCE OF UNINSULATED “DANGEROUS VOLTAGE” THAT MAY BE OF SUFFICIENT MAGNITUDE TO CONSTITUTE ARISK OF ELEC- TRIC SHOCK. THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERTTHE SERVICE PERSONNELTO THE PRESENCE OF IMPORT

5、ANTSAFETYINFORMATION IN SERVICE LITERATURE. SUBJECT: X-RADIATION 1.BE SURE PROCEDURES AND INSTRUCTIONS TO ALL SERVICE PERSONNEL COVER THE SUBJECT OF X-RADIATION. THE ONLY POTENTIAL SOURCE OF X-RAYS IN CUR- RENTT.V. RECEIVERS IS THE PICTURE TUBE. HOWEVER, THIS TUBE DOES NOTEMIT X-RAYS WHEN THE HIGH V

6、OLTAGE IS ATTHE FACTORYSPECIFIED LEVEL. THE PROP- ER VALUE IS GIVEN IN THE APPLICABLE SCHEMATIC. OPERATION AT HIGHER VOLT- AGES MAYCAUSE AFAILURE OF THE PICTURE TUBE OR HIGH VOLTAGE SUPPLYAND, UNDER CERTAIN CIRCUMSTANCES, MAYPRODUCE RADIATION IN EXCESS OF DESIR- ABLE LEVELS. 2.ONLY FACTORY SPECIFIED

7、 C.R.T. ANODE CONNECTORS MUST BE USED. DEGAUSS- ING SHIELDS ALSO SERVE AS X-RAY SHIELD IN COLOR SETS, ALWAYS RE-INSTALL THEM. 3.ITIS ESSNTIALTHATSERVICE PERSONNELHAVE AVAILABLE AN ACCURATE AND RELI- ABLE HIGH VOLTAGE METER. THE CALIBRATION OF THE METER SHOULD BE CHECKED PERIODICALLY AGAINST A REFERE

8、NCE STANDARD, SUCH AS THE ONE AVAILABLE ATYOUR DISTRIBUTOR. 4.WHEN THE HIGH VOLTAGE CIRCUITRY IS OPERATING PROPERLY THERE IS NO POS- SIBILITYOF AN X-RADIATION PROBLEM. EVERYTIME ACOLOR CHASSIS IS SERVICED. THE BRIGHTNESS SHOULD BE RUN UP AND DOWN WHILE MONITORING THE HIGH VOLTAGE WITH AMETER TO BE C

9、ERTAIN THATTHE HIGH VOLTAGE DOES NOTEXCEED THE SPECIFIED VALUE AND THATITIS REGULATING CORRECTLY, WE SUGGESTTHAT YOU AND YOUR SERVICE ORGANIZATION REVIEW TESTPROCEDURES SO THATVOLT- AGE REGULATION IS ALWAYS CHECKED AS A STANDARD SERVICING PROCEDURE. AND THAT THE HIGH VOLTAGE READING BE RECORDER ON E

10、ACH CUSTOMERS INVOICE. 5.WHEN TROUBLESHOOTING AND MAKING TESTMEASUREMENTS IN APRODUCTWITH APROBLEM OF EXCESSIVE HIGH VOLTAGE, AVOID BEING UNNECESSARILYCLOSE TO THE PICTURE TUBE AND THE HIGH VOLTAGE SUPPLY. DO NOT OPERATE THE PROD- UCTLONGER THAN IS NECESSARYTO LOCATE THE CAUSE OF EXCES SIVE VOLTAGE.

11、 6.REFER TO HV. B+ AND SHUTDOWN ADJUSTMENT PROCEDURES DESCRIBED IN THE APPROPRIATE SCHEMATIC AND DIAGRAMS (WHERE USED). SUBJECT: IMPLOSION 1.ALLDIRECTVIEWED PICTURE TUBES ARE EQUIPPED WITH AN INTE GRALIMPLOSION PROTECTION SYSTEM, BUT CARE SHOULD BE TAKEN TO AVOID DAMAGE DURING INSTALLATION, AVOID SC

12、RATCHING THE TUBE. IF SCRATCHED REPLACE IT. 2.USE ONLYRECOMMENDED FACTORYREPLACEMENTTUBES. SUBJECT: TIPS ON PROPER INSTALLATION 1.NEVER INSTALLANY PRODUCT IN A CLOSED-IN RECESS, CUBBYHOLE OR CLOSELY FITTING SHELF SPACE. OVER OR CLOSE TO HEATDUCT, OR IN THE PATH OF HEATED AIR FLOW. 2.AVOID CONDITIONS

13、 OF HIGH HUMIDITY SUCH AS: OUTDOOR PATIO INSTALLATIONS WHERE DEW IS AFACTOR, NEAR STEAM RADIATORS WHERE STEAM LEAKAGE IS A FACTOR, ETC. 3.AVOID PALCEMENT WHERE DRAPERIES MAY OBSTRUCT REAR VENTING. THE CUS- TOMER SHOULD ALSO AVOID THE USE OF DECORATIVE SCARVES OR OTHER COV- ERINGS WHICH MIGHTOBSTRUCT

14、VENTILATION. 4.WALLAND SHELF MOUNTED INSTALLATIONS USING A COMMERCIAL 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, B

15、OLTS OR SCREWS USED FOR FASTENERS MUST NOT TOUCH ANY PARTS OR WIRING. PERFORM LEAKAGE TESTON CUSTOMIZED INSTALLATIONS. 5.CAUTION CUSTOMERS AGAINSTTHE MOUNTING OF APRODUCTON SLOPING SHELF OR ATILTED POSITION, UNLESS THE PRODUCTIS PROPERLYSECURED. 6.APRODUCTON AROLL-ABOUTCARTSHOULD BE STABLE ON ITS MO

16、UNTING TO THE CART. CAUTION THE CUSTOMER ON THE HAZARDS OF TRYING TO ROLLACARTWITH SMALLCASTERS ACROSS THRESHOLDS OR DEEPPILE 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 SPE- CIFIC MODELOF TELEVISION

17、RECEIVER OR GENERICALLYAPPROVED 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 FORESTOF EXTENSIONS SPROUTING FROM ASINGLE OUTLETCAN LEAD TO DISAS- TROUS CONSEQUENCES TO HOME AND FAMILY. PRODUCT SAFETY SERVICING GUIDELINES

18、FOR VCR+DVD COMBO PRODUCTS 1-4 SERVICING PRECAUTIONS CAUTION: Before servicing the VCR+DVD Combo covered by this service data and its supplements and addends, read and follow the SAFETY PRECAUTIONS. NOTE: if unfore- seen circumstances create conflict between the following servicing precautions and a

19、ny of the safety precautions in this publications, always follow the safety precautions. Remember Safety First : General Servicing Precautions 1.Always unplug the VCR+DVD Combo AC power cord from the AC power source before: (1) Removing or reinstalling any component, circuit board, module, or any ot

20、her assembly. (2) Disconnecting or reconnecting any internal electrical plug or other electrical connection. (3) Connecting a test substitute in parallel with an elec- trolytic capacitor. Caution : A wrong part substitution or incorrect polari- ty installation of electrolytic capacitors may result i

21、n an explosion hazard. 2.Do not spray chemicals on or near this VCR+DVD Combo or any of its assemblies. 3.Unless specified otherwise in this service data, clean elec- trical contacts by applying an appropriate contact cleaning solution to the contacts with a pipe cleaner, cotton-tipped swab, or comp

22、arable 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 which instruments covered by this service manual might be equipped. 5.Do not apply AC power to this VCR+DVD Combo and / or any

23、of its electrical assemblies unless all solid state device heat sinks are correctly installed. 6.Always connect the test instrument ground lead to an appropriate ground before connecting the test instrument positive lead. Always remove the test instrument ground lead last. Insulation Checking Proced

24、ure 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 resist- ance between each blade of the attachment plug and acces- sible conductive parts (Note 1) should be more than 1Mohm.

25、 Note 1: Accessible Conductive Parts include Metal panels, Input terminals, Earphone jacks,etc. Electrostatically Sensitive (ES) Devices Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive (ES) Devices.

26、 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 component damage caused by static electricity. 1.Immediately before handling any semiconductor compo- n

27、ent or semiconductor-equipped assembly, drain off any electrostatic charge on your body by touching a known earth ground. Alternatively, obtain and wear a commercial- ly available discharging wrist strap device, which should be removed for potential shock reasons prior to applying power to the unit

28、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 the assembly. 3.Use only a grounded-tip soldering iron to solder or unsol- der ES devices. 4.Use only

29、 an anti-static solder removal device. Some solder removal devices not classified as “anti-static” can generate electrical charges sufficient to damage ES devices. 5.Do not use freon-propelled chemicals. These can generate an electrical charge sufficient to damage ES devices. 6.Do not remove a repla

30、cement 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, aluminum foil,or comparable conductive material). 7.Immediately before removing the protective m

31、aterial 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 chassis or cir- cuit, and observe all other safety precautions. 8.Minimize bodily motions when hand

32、ling 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 sufficient to damage an ES device.) 1-5 INFORMATION ABOUT LEAD-FREE SOLDERING Philips CE is produ

33、cing lead-free sets from 1.1.2005 onwards. INDENTIFICATION: Regardless of special logo (not always indicated) one must treat all sets from 1 Jan 2005 onwards, according next rules: Example S/N: Bottom line of typeplate gives a 14-digit S/N. Digit 5 SW 30Hz PAL:SW 25Hz Head switching output point RF

34、Envelope output point Play the standard test tape. 6. X-distance Adjustment Left X-distance Adjusting Hole Tilt Adjusting Screw (C) Fixing Screw Height Adjusting Screw (B) Right Grove of Base A/C Purpose of adjustment : To maintain compatibility with other VCR (VCP). RF ENVELOPE OUTPUT POINT HEAD RF

35、 SWITCHING OUTPUT POINT OSCILLOSCOPE Connection Diagram CH-2CH-1 Azimuth Adjustment Screw(A) Checking/Adjustment Procedure 1) Play the blank tape (empty tape) and check whether the guide roller crumbles or wrinkles the tape and adjust it if necessary. 2) Check that the RF envelope output waveform is

36、 flat, and adjust the height of the guide roller while playing the standard test tape. 3) Adjust the switching point. 4) Check the RF envelope output is the maximum when the tracking control locates at the center. If not maxi- mum, set up to ensure that RF envelope output becomes the maximum by turn

37、ing the (+) type driver ( 3 4) on the base A/C groove. 4-18 DECK MECHANISM ADJUSTMENT 8-2. Check of Tape Curl and Jam Status Fixtures and tools usedConnection positionVCR (VCP) statusAdjustment position Oscilloscope Standard test tape (only for SP) Post Height Adjusting Driver Driver (+) Type 5 CH-1

38、: PB RF Envelope CH-2: NTSC : SW 30Hz PAL:SW 25Hz Head switching output point RF Envelope output point Play the blank tape. Play the standard test tape. Fine adjustment of guide roller Switching Point Tracking Preset X-distance 7. Adjustment after Drum Assembly (Video Heads) Purpose of adjustment :

39、To adjust and stabilize the height change, X-distance change, etc depending on the guide roller after assembling the drum. RF ENVELOPE OUTPUT POINT V2V1V1 V1/V MAX = 0.7 V1/V MAX = 0.8 RF ENVELOPE OUTPUT HEAD RF SWITCHING OUTPUT POINT OSCILLOSCOPE Connection Diagram Waveform CH-2CH-1 Checking Proced

40、ure 1) Check that locking time of the RF and Audio waveform is fallen within the measuring standard in conversion of the play mode from the CUE or the REV mode. 2) Readjust the paragraph 5 and 6 if it deviates from the standard. Fixtures and tools usedMeasuring standardConnection positionVCR (VCP) s

41、tatus Oscilloscope 6H 3KHz Color Bar Standard Test tape Stop Watch RF Locking Time: Within 5 seconds Audio Locking Time : Within 10 seconds CH-1: PB RF Envelope CH-2: Audio output RF Envelope output point Audio output jack Play the 6H 3KHz Color Bar Standard Test tape. 8. Check of Traveling Device a

42、fter Deck Assembly 8-1. Audio, RF Normalization Time (Locking Time) Check in Play after CUE or REV Checking Procedure 1) Check there is no abnormality of every traveling post status. 2) There must be no abnormal operation of the counter in occurrence of folding of the bottom tape. There must be not

43、abnormality of audio signal in damage of the top tape. 3) If there is abnormality, readjust the adjustment para- graph 4 and 5. Fixtures and tools usedFixtures and tools usedFixtures and tools used T-160 Tape T-120 Tape There must be no jam or curl at the first, middle and end position of tape. Trav

44、el the tape at the position of its first and end. PROTECTION, MAINTENANCE AND CHECK OF VIDEO FUNCTION 4-19 (3) F/E Head (5) Drum Assembly (Video Head) (4) Base Assembly P2 (2) Tension Post (1) Supply Reel (6) Base Assembly P3 Phenomena Replace- ment Checking Points and Cause Color beatPollution of F

45、ull-Erase Heado S/N, Color FadedPollution of Video Heado Horizontal, Vertical Jitteo CAUTIONS If operation of the position with (O) mark is abnormal even after removing cause, replace it with substitute product since it shows damage or wearing. (7) A/C Head (8) P4 Post (10) Pinch Roller (11) Take-up

46、 Guide Post (9) Capstan Shaft (12) Take-up Reel * No. (1) (12) shows sequence that the tape moves from the supply reel to the take-up reel.) Fig. C-9-1 TOP VIEW Fig. C-9-2 BOTTOM VIEW F/E Head Video Head A/C Head Pinch Roller Belt Capston Clutch Assembly A37 Fig. C-9-3 Tape Transport System Pollutio

47、n of Video Head or Tape Transport System Poor Sound, Low Soundo Pollution of Audio/Control Head o Pollution of Pinch Roller or Belt Capstan Belt No tape wound or tape wound loosely. FF or REW impossible, or slow turning Deterioration of Clutch Assembly D37 Torque Pollution of Drum and Traveling Devi

48、ce Tape loosely wound in REV or Unloading o Fig. C-9-3 1. Checking Points prior to Repair Following abnormal phenomena may be repaired by removal of foreign materials and oil supply. Check oiling is required at the checking set or cleaning status is complete. Determine that necessity of checking and

49、 repair the set exists after checking the using period of the set together with the user. In this case, followings must be checked: PROTECTION, MAINTENANCE AND CHECK OF VIDEO FUNCTION 4-20 2. Essential Check and Repair Recording density of the video is far higher than the audio. Therefore video parts are very precise so as to allow only error of 1/1000mm or so in order to maintain compatibility with other videos. If one of these parts is polluted or old, same phenomena will appear as they are damaged. To maintain clear screen, regular check,