HarmanKardon-DVD50-cd-sm维修电路原理图.pdf

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1、 harman kardon Model DVD 50 5 Disc DVD/CD/CD-R/CD-RW/VCD MP3 Changer Service Manual - Contents - PRODUCT SAFETY SERVICE GUIDELINES.2 SERVICE PRECAUTIONS.3 SPECIFICATIONS.4 FRONT PANEL CONTROLS.5 INFORMATION DISPLAY.6 REAR PANEL CONNECTIONS.8 REMOTE CONTROL.9 INSTALLATION/CONNECTIONS.12 BASIC TROUBLE

2、SHOOTING GUIDE.17 DISASSEMBLY18 OVERALL EXPLODED VIEWS.20 DECK MECHANISM EXPLODED VIEW.22 DECK MECHANISM PARTS LOCATOR.23 DECK MECHANISM DISASSEMBLY.24 DECK MECHANISM ADJUSTMENT.27 MECHANICAL PARTS LIST29 DETAILED TROUBLESHOOTING GUIDE30 BULLETIN HK2001-05.40 BULLETIN HK2002-02.43 BLOCK DIAGRAMS.45

3、WAVEFORMS.50 VOLTAGE CHART.51 PCB DRAWINGS52 ELECTRICAL PARTS LIST.57 SCHEMATICS.68 PACKING76 harman/kardon, Inc. 250 Crossways Park Dr. Woodbury, New York 11797 Rev1 9/2005 RadioFans.CN 2 CAUTION : DO NOT ATTEMPT TO MODIFY THIS PRODUCT IN ANY WAY, NEVER PERFORM CUSTOMIZED INSTALLATIONS WITHOUT MANU

4、FAC- TURERS APPROVAL. UNAUTHORIZED MODIFICATIONS WILL NOT ONLY VOID THE WARRANTY, BUT MAY LEAD TO YOUR BEING LIABLE FOR ANY RESULTING PROPERTY DAMAGE OR USER INJURY. SERVICE WORK SHOULD BE PERFORMED ONLY AFTER YOU ARE THOROUGHLY FAMILIAR WITH ALL OF THE FOLLOWING SAFETY CHECKS AND SERVICING GUIDELIN

5、ES. TO DO OTHERWISE, INCREASES THE RISK OF POTENTIAL HAZARDS AND INJURY TO THE USER. WHILE SERVICING, USE AN ISOLATION TRANSFORMER FOR PROTEC- TION FROM A.C. LINE SHOCK. SAFETY CHECKS AFTER THE ORIGINAL SERVICE PROBLEM HAS BEEN CORRECTED. A CHECK SHOULD BE MADE OF THE FOLLOWING. SUBJECT : FIRE CONNE

6、CT 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, 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

7、.C. PLUG AND REPEAT A.C. VOLTAGE MEASUREMENTS FOR EACH EXPOSED 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 MUST BE CORRECTED IMMEDIATELY. SUBJECT: GRAPHIC SYMBOLS THE LIGH

8、TNING 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 MAG- NITUDE TO CONSTITUTE A RISK OF ELECTRIC SHOCK. THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIAN- GLE IS INT

9、ENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE LITERATURE. SUBJECT : X-RADIATION 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

10、 PIC- TURE TUBE. HOWEVER, THIS TUBE DOES NOT EMIT X-RAYS WHEN THE HIGH VOLTAGE IS AT THE FACTORY SPECIFIED LEVEL. THE PROPER VALUE 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,

11、 MAY PRODUCE RADIATION IN EXCESS OF DESIR- ABLE LEVELS. 2. ONLY FACTORY SPECIFIED C.R.T. ANODE CONNECTORS MUST BE USED. DEGAUSSING SHIELDS ALSO SERVE AS AN X-RAY SHIELD IN COLOR SETS, ALWAYS RE-INSTALL THEM. 3. IT IS ESSNTIAL THAT SERVICE PERSONNEL HAVE AVAILABLE AN ACCURATE AND RELIABLE HIGH VOLTAG

12、E METER. THE CALIBRA- TION OF THE METER SHOULD BE CHECKED PERIODICALLY AGAINST A REFERENCE STANDARD, SUCH AS THE ONE AVAILABLE AT YOUR 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

13、BRIGHTNESS SHOULD BE RUN UP AND DOWN WHILE MONITORING THE HIGH VOLTAGE WITH A METER TO BE CERTAIN THAT THE HIGH VOLTAGE DOES NOT EXCEED 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

14、ALWAYS CHECKED AS A STANDARD SERVICING PROCE- DURE AND THAT THE HIGH VOLTAGE READING BE RECORDED ON EACH CUSTOMERS INVOICE. 5. WHEN TROUBLESHOOTING 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 VOL

15、TAGE SUPPLY. DO NOT OPERATE THE PRODUCT LONGER THAN IT IS NECESSARY TO 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. ALL DIRECT VIEWED PICTURE TUBES ARE EQUIPPED W

16、ITH AN INTE- GRAL IMPLOSION PROTECTION SYSTEM, BUT CARE SHOULD BE TAKEN TO AVOID DAMAGE DURING INSTALLATION, AVOID SCRATCHING THE TUBE. IF 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

17、, 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 HUMIDITY SUCH AS: OUTDOOR PATIO INSTALLATIONS WHERE DEW IS A FACTOR, NEAR STEAM RADIA- TORS WHERE STEAM LEAKAGE IS A FACTOR, ETC. 3. AVOID PLACEMENT WHERE DRAPERIE

18、S MAY OBSTRUCT REAR VENTING. THE CUSTOMER SHOULD ALSO AVOID THE USE OF DEC- ORATIVE SCARVES OR OTHER COVERINGS WHICH MIGHT OBSTRUCT VENTILATION. 4. WALL AND SHELF MOUNTED INSTALLATIONS USING A COMMER- CIAL MOUNTING KIT, MUST FOLLOW THE FACTORY APPROVED MOUNTING INSTRUCTIONS. A PRODUCT MOUNTED TO A S

19、HELF OR PLATFORM MUST RETAIN ITS ORIGINAL FEET (OR THE EQUIVALENT THICKNESS IN SPACERS) TO PROVIDE ADEQUATE AIR FLOW ACROSS THE BOTTOM. BOLTS OR SCREWS USED FOR FASTENERS MUST NOT TOUCH ANY PARTS OR WIRING. PERFORM LEAKAGE TEST ON CUSTOMIZED INSTALLATIONS. 5. CAUTION CUSTOMERS AGAINST THE MOUNTING O

20、F 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 STABLE 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. CAUT

21、ION CUSTOMERS AGAINST THE USE OF A CART OR STAND WHICH HAS NOT BEEN LISTED BY UNDERWRITERS LABORATORIES, INC. FOR USE WITH THEIR SPECIFIC MODEL 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

22、. EXPLAIN THAT A FOREST OF EXTENSIONS SPROUTING FROM A SIN- GLE OUTLET CAN LEAD TO DISASTROUS CONSEQUENCES TO HOME AND FAMILY. PRODUCT SAFETY 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 Radi

23、oFans.CN 3 SERVICING PRECAUTIONS CAUTION : Before servicing the DVD covered by this service data and its supplements and ADDENDUMS, read and fol- low the SAFETY PRECAUTIONS. NOTE : if unforeseen cir- cumstances create conflict between the following servicing precautions and any of the safety precaut

24、ions in this publi- cations, always follow the safety precautions. Remember Safety First: General Servicing Precautions 1. Always unplug the DVD AC power cord from the AC power source before: (1)Removing or reinstalling any component, circuit board, module, or any other assembly. (2)Disconnection or

25、 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 polarity installation of electrolytic capacitors may result in an explosion hazard. 2. Do not spra

26、y 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 appropriate contact cleaning solution to the contacts with a pipe cleaner, cotton-tipped swab, or comparable soft applicator. Unless specified otherw

27、ise in this service data, lubrication of contacts is not required. 4. Do not defeat any plug/socket B+ voltage interlocks with whitch instruments covered 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 devi

28、ce heat sinks are cerrectly installed. 6. Always connect test instrument ground lead to the appropriate ground before connection 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

29、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 the attachment plug and acces- sible conductive parts (Note 1) should be more than 1M- ohm. Note 1 : Accessible Conductive Parts including Metal pan

30、- els, 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 circ

31、uits 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- nent or semiconductor-equipped assembly, drain off

32、any electrostatic charge on your body by touching a known earth ground. Alternatively, obtain and wear a commer- cially 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 assemb

33、ly 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 solde

34、r removal devices not classified a “anti-static” can generate electrical charges sufficient to damage ES devices. 5. Do not use freon-propelled chemicals. These can generate electrical charge sufficient to damage ES devices. 6. Do not remove a replacement ES device from its protec tive package until

35、 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,

36、 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

37、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.) SHIPPING PRECAUTION: If power is removed from the unit before the “NO DISC” message, then the carousel has not

38、reached the home position, and movement of the laser assembly during shipping can cause the mechanism to jam. Before the unit is shipped, the mechanism should be set to its home position performing following steps: Power on unit. Wait until unit displays “NO DISC”. Power unit off. RadioFans.CN 250 C

39、rossways Park Drive,Woodbury, New York 11797 2001 Harman Kardon, Incorporated Applicable Discs:5-inch (12cm) or 3-inch (8cm) DVD-Movie, CD,Video CD, MP3-CD, HDCD, CD-R or CD-RW discs Region 1 DVD-Movie discs DVD: Single/Single Layer, Single Side/Dual Layer, Dual Side/Dual Layer Linear PCM, Dolby Dig

40、ital or DTS Audio Video Signal System:NTSC Composite Video Output:1Vp-p/75 Ohms, sync, negative polarity S-Video:Y/Liminace: 1Vp-p/75 Ohms, sync, negative polarity C/Chrominance: 0.286Vp-p Component Video Output:Y: 1Vp-p/75 Ohms, sync, negative polarity Pr: 0.7Vp-p/75 Ohms Pb: 0.7Vp-p/75 Ohms Progre

41、ssive Scan Output:Y: 1Vp-p/75 Ohms, sync, negative polarity Pr: 0.7Vp-p/75 Ohms Pb: 0.7Vp-p/75 Ohms Analog Audio Output:HDCD: 2.0V RMS +/ 0.2V Others: 1.0Vp-p RMS +/ 0.2V Coaxial Digital Audio Output:0.5Vp-p/75 Ohms Frequency Response:4Hz 22kHz +/ 0.5dB (48kHz sampling) Dynamic Range:DVD: 97dB (20-b

42、it) CD: 97dB Channel Separation:106dB THD:DVD: 0.0035% CD: 0.0035% Signal-to-Noise Ratio:106dB WOW 5,638,074; 5,640,161; 5,808,574; 5,838,274; 5,854,600; 5,864,311; 5,872,531; and in Australia: 669114. Other patents pending. Technical Specifications www.freeservicemanuals.info 4 5 FRONT PANEL CONTRO

43、LS 1 Power Switch: Press the button once to turn the DVD 50 on; press it again to put the unit in the Standby mode. 2 Status Indicator: When the DVD 50 is in the On mode, this indicator will glow green. When the unit has been placed in the Standby mode by pressing the Power-Off Button on the remote,

44、 the indicator will glow amber, indicating that the unit is still connected to the AC main supply and is ready to be turned on from the remote control. 3 Headphone Jack: Connect standard head- phones to this jack for private listening. 4 Headphone Level Control: Turn this control to adjust the volum

45、e level to the head- phones. Note that the use of this control will not change the analog output levels at the rear panel audio outputs. 5 Disc Tray: This tray holds as many as five compatible discs that can be played one at a time in the DVD 50. 6 Direct Access Buttons: Press one of these buttons t

46、o play any of up to five discs loaded in the Disc Tray. 7 Disc Skip: Press this button to change the disc being played. Each press of the button will move the tray forward to the next occupied position in the tray. Note that the unit will skip over the empty disc positions. 8 Search Forward/Reverse:

47、 Press this but- ton to move forward or backward through a CD or DVD at one of four speeds. Each press and release will increase the search speed, as indi- cated in the on-screen display. Once you have selected the desired speed, release the button and the disc will continue to search at fast speed.

48、To resume normal playback speed, press the Play Button #. 9 Open/Close Button: Press this button to open or close the Disc Tray 5. ) Skip Forward/Reverse: Press this button to move forward or backward through the music tracks on a CD disc or the chapters on a DVD disc. ! Stop: Press this button once

49、 to place the disc in the Resume mode, which means that playback will stop, but as long as the tray is not opened or the disc changed, DVD playback will continue from the same point on the disc when the Play button is pressed again. Resume will also work if the unit was turned off.To stop a disc and have play start from the beginning, press the button twice. Pause: Press this button to momentarily pause playback.To resume playback, press the Play Button #. If a DVD is playing, action will fr