Philips-DVP-3350-Service-Manual(1) 电路图 维修手册.pdf

VCR+DVD PLAYER SECTION 1 SUMMARY1-1 PRODUCT SAFETY SERVICING GUIDELINES FOR VCR+DVD PRODUCTS1-3 SERVICING PRECAUTIONS1-4 INFORMATION ABOUT LEAD-FREE SOLDERING1-5 SERVICE INFORMATION FOR EEPROM IC SETTING(VCR)1-6 SERVICE INFORMATION FOR EEPROM (DVD)1-7 SPECIFICATIONS1-8 SECTION 2 CABINET CONNECTA1500 OHM 10 WATT RESISTOR, PARALLELED BYA.15 MFD. 150.V A.C TYPE CAPACITOR BETWEEN A KNOWN GOOD EARTH GROUND (WATER PIPE, CONDUIT, 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 MUSTNOTEXCEED 75 VOLTS R.M.S. THIS CORRESPONDS TO 0.5 MILLIAMPA.C ANY VALUE EXCEEDING THIS LIMIT CONSTITUTES APOTENTIAL SHOCK HAZARD AND MUSTBE 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 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 PERSONNELTO THE PRESENCE OF IMPORTANTSAFETYINFORMATION IN SERVICE LITERATURE. SUBJECT: X-RADIATION 1.BE SURE PROCEDURES AND INSTRUCTIONS TO ALLSERVICE PERSONNELCOVER THE SUBJECTOF X-RADIATION. THE ONLYPOTENTIALSOURCE OF X-RAYS IN CURRENTT.V. RECEIVERS IS THE PICTURE TUBE. HOWEVER, THIS TUBE DOES NOT EMIT X-RAYS WHEN THE HIGH VOLTAGE IS ATTHE FACTORYSPECIFIED LEVEL. THE PROPER VALUE IS GIVEN IN THE APPLICABLE SCHEMATIC. OPERATION AT HIGHER VOLTAGES MAY CAUSE A FAILURE OF THE PICTURE TUBE OR HIGH VOLTAGE SUPPLY AND, UNDER CERTAIN CIRCUMSTANCES, MAY PRODUCE RADIATION IN EXCESS OF DESIRABLE LEVELS. 2.ONLYFACTORYSPECIFIED C.R.T. ANODE CONNECTORS MUSTBE USED. DEGAUSSING SHIELDS ALSO SERVE AS X-RAYSHIELD IN COLOR SETS, ALWAYS RE-INSTALLTHEM. 3.IT IS ESSNTIAL THAT SERVICE PERSONNEL HAVE AVAILABLE AN ACCURATE AND RELIABLE HIGH VOLTAGE METER. THE CALIBRATION OF THE METER SHOULD BE CHECKED PERIODICALLY AGAINST A REFERENCE STANDARD, SUCH AS THE ONE AVAILABLE ATYOUR 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 UPAND DOWN WHILE MONITORING THE HIGH VOLTAGE WITH A METER TO BE CERTAIN THAT THE HIGH VOLTAGE DOES NOT EXCEED THE SPECIFIED VALUE AND THATITIS REGULATING CORRECTLY, WE SUGGEST THATYOU AND YOUR SERVICE ORGANIZATION REVIEW TESTPROCEDURES SO THAT VOLTAGE REGULATION IS ALWAYS CHECKED AS ASTANDARD SERVICING PROCEDURE. AND THAT THE HIGH VOLTAGE READING BE RECORDER ON EACH CUSTOMERS INVOICE. 5.WHEN TROUBLESHOOTING AND MAKING TESTMEASUREMENTS IN APRODUCTWITH A PROBLEM OF EXCESSIVE HIGH VOLTAGE, AVOID BEING UNNECESSARILY CLOSE TO THE PICTURE TUBE AND THE HIGH VOLTAGE SUPPLY. DO NOTOPERATE THE PRODUCT LONGER THAN IS NECESSARYTO LOCATE THE CAUSE OF EXCES SIVE VOLTAGE. 6.REFER TO HV. B+ AND SHUTDOWN ADJUSTMENT PROCEDURES DESCRIBED IN THE APPROPRIATE SCHEMATIC AND DIAGRAMS (WHERE USED). SUBJECT: IMPLOSION 1.ALLDIRECT VIEWED PICTURE TUBES ARE EQUIPPED WITH AN INTE GRALIMPLOSION PROTECTION SYSTEM, BUT CARE SHOULD BE TAKEN TO AVOID DAMAGE DURING INSTALLATION, AVOID SCRATCHING THE TUBE. IF SCRATCHED REPLACE IT. 2.USE ONLYRECOMMENDED FACTORYREPLACEMENTTUBES. SUBJECT: TIPS ON PROPER INSTALLATION 1.NEVER INSTALL ANY PRODUCT IN A CLOSED-IN RECESS, CUBBYHOLE OR CLOSELY FITTING SHELF SPACE. OVER OR CLOSE TO HEAT DUCT, OR IN THE PATH OF HEATED AIR FLOW. 2.AVOID CONDITIONS OF HIGH HUMIDITY SUCH AS: OUTDOOR PATIO INSTALLATIONS WHERE DEW IS A FACTOR, NEAR STEAM RADIATORS WHERE STEAM LEAKAGE IS A FACTOR, ETC. 3.AVOID PALCEMENT WHERE DRAPERIES MAY OBSTRUCT REAR VENTING. THE CUSTOMER SHOULD ALSO AVOID THE USE OF DECORATIVE SCARVES OR OTHER COVERINGS WHICH MIGHTOBSTRUCTVENTILATION. 4.WALL AND 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 EQUIVALENTTHICKNESS IN SPACERS) TO PROVIDE ADEQUATE AIR FLOW ACROSS THE BOTTOM, BOLTS OR SCREWS USED FOR FASTENERS MUSTNOTTOUCH ANYPARTS OR WIRING. PERFORM LEAKAGE TESTON CUSTOMIZED INSTALLATIONS. 5.CAUTION CUSTOMERS AGAINST THE MOUNTING OF APRODUCT ON SLOPING SHELF OR ATILTED POSITION, UNLESS THE PRODUCTIS PROPERLYSECURED. 6.APRODUCT ON AROLL-ABOUT CART SHOULD BE STABLE ON ITS MOUNTING TO THE CART. CAUTION THE CUSTOMER ON THE HAZARDS OF TRYING TO ROLLACARTWITH SMALLCASTERS ACROSS THRESHOLDS OR DEEPPILE CARPETS. 7.CAUTION CUSTOMERS AGAINSTTHE USE OF ACARTOR STAND WHICH HAS NOTBEEN LISTED BY UNDERWRITERS LABORATORIES, INC. FOR USE WITH THEIR SPECIFIC MODELOF TELEVISION 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 FOREST OF EXTENSIONS SPROUTING FROM A SINGLE OUTLET CAN LEAD TO DISASTROUS CONSEQUENCES TO HOME AND FAMILY. PRODUCT SAFETY SERVICING GUIDELINES FOR DVD+VCR PRODUCTS 1-4 SERVICING PRECAUTIONS CAUTION: Before servicing the VCR+DVD covered by this service data and its supplements and addends, read and follow the SAFETY PRECAUTIONS. NOTE: if unforeseen circumstances create conflict between the following servicing precautions and any of the safety precautions in this publications, always follow the safety precautions. Remember Safety First : General Servicing Precautions 1.Always unplug the VCR+DVD AC power cord from the AC power source before: (1) Removing or reinstalling any component, circuit board, module, or any other assembly. (2) Disconnecting or reconnecting any internal electrical plug or other electrical connection. (3) Connecting a test substitute in parallel with an electrolytic capacitor. 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 VCR+DVD or any of its assemblies. 3.Unless specified otherwise in this service data, clean electrical contacts by applying an 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 which instruments covered by this service manual might be equipped. 5.Do not apply AC power to this VCR+DVD and/or any 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 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 resistance between each blade of the attachment plug and accessible conductive parts (Note 1) should be more than 1Mohm. 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. 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 component or semiconductor-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.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 unsolder ES 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 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 replacement ES device from its protective 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 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 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 electricity sufficient to damage an ES device.) 1-5 INFORMATION ABOUT LEAD-FREE SOLDERING Philips CE is producing 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 30Hztape. (only for SP)PAL:SW 25Hz Driver (+) Type 4 Head switching output point RF Envelope output point Adjustment Procedure 1) After releasing the auto tracking, lightly turn the fixing screw. Turn the (+) type driver ( 3 4) on the X- distance adjusting hole to the right or left. Adjust the RF envelope level to the maximum point and then fix the fixing screws. 2) For the 31mm head, adjust it with the SP tape recorded in the width of 31mm since the head travels on the tape track only for SP with the width of 58mm. Purpose of adjustment: To maintain compatibility with other VCR (VCP). 4-19 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 DECK MECHANISM ADJUSTMENT 7. Adjustment after Drum Assembly (Video Heads) Fixtures and tools usedConnection positionVCR (VCP) statusAdjustment position Oscilloscope CH-1: PB RF Envelope Play the blank tape. Fine adjustment of Standard test tape CH-2: NTSC : SW 30Hz Play the standard testguide roller (only for SP)PAL:SW 25Hztape. Switching Point Post Height Adjusting Head switching output Tracking Preset Driverpoint X-distance Driver (+) Type 5 RF Envelope output point 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 flat, and adjust the height of the guide roller while playing the standard test tape. 3) Adjust the switching point. 4) Check if the RF envelope output is the maximum when the tracking control locates at the center. If not maximum, set up to ensure that RF envelope output becomes the maximum by turning the (+) type driver ( 3 4) on the base A/C groove. Purpose of adjustment : To adjust and stabilize the height change, X-distance change, etc depending on the guide roller after assembling the drum. 8. Check of Traveling Device after Deck Assembly 8-1. Audio, RF Normalization Time (Locking Time) Check in Play after CUE or REV Fixtures and tools usedMeasuring standardConnection positionVCR (VCP) status Oscilloscope RF Locking Time: Within CH-1: PB RF Envelope Play the 6H 3KHz 6H 3KHz Color Bar5 seconds CH-2: Audio outputColor Bar Standard Standard Test tape Audio Locking Time: RF Envelope outputTest tape. Stop WatchWithin 10 secondspoint Audio output jack Checking Procedure 1) Check that the locking time of the RF and Audio waveform has fallen within the measuring standard in conversion of the play mode from the CUE or the REV mode. 2) Perform sections 5 and 6 if it deviates from the standard. 8-2. Check of Tape Curl and Jam Status Fixtures and tools usedFixtures and tools usedFixtures and tools used T-160 Tape There must be no jam or curl at the Travel the tape at the position T-120 Tapefirst, middle and end position of tape.of its first and end. Checking Procedure 1) Check that there is no abnormality of traveling post status. 2) There must be no abnormal operation of the counter in if bottom tape folds. There must be no abnormality of audio signal top tape is damaged. 3) If there is abnormality, perform the adjustment in sections 4 and 5. 4-20 PROTECTION, MAINTENANCE AND CHECK OF VIDEO FUNCTION (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 Full-Erase Heado S/N, Color FadedPollution of Video Heado Horizontal, Vertical Jitteo (7) A/C Head (8) P4 Post (10) Pinch Roller (11) Take-up 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 Pollution 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 Device 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 if oiling is required or cleaning status is required. Determine that necessity of checking and repair. 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. CAUTIONS 4-21 About 1 year One hour Table 1 Two hours Three hours Time Requiring Checking Average hours used per day About 18 months About 3 years Fig. C-9-4 Drum (Turning Cylinder) Head Tip Soak alcohol (Isopropyl Alcohol). Cleaning Patch (Cloth) Smoothly turn the drum (turning cylinder) touching the soft surface to the head tip surface. PROTECTION, MAINTENANCE AND CHECK OF VIDEO FUNCTION 2. Essential Check and Repair Recording density of the video is far higher than the audio. Therefore video parts are ve