Philips-PET-740-Service-Manual电路原理图.pdf

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1、DVD Portable Player PET740 All version 3141 785 32870 Version 1.0 TABLE OF CONTENTS Chapter Technical Specification fr Reparaturen sind Original-Ersatzteile zu verwenden.ILe norme di sicurezza esigono che lapparecchio venga rimessonelle condizioni originali e che siano utilizzati i pezzi di ricambio

2、identici a quelli specificati.“After servicing and before returning set to customer perform aleakage current measurement test from all exposed metal parts toearth ground to assure no shock hazard exist. The leakage currentmust not exceed 0.5mA.“CLASS 1LASER PRODUCT3122 110 03420GB Warning !Invisible

3、 laser radiation when open.Avoid direct exposure to beam.S Varning !Osynlig laserstrlning nr apparaten r ppnad och sprrenr urkopplad. Betrakta ej strlen.SF Varoitus !Avatussa laitteessa ja suojalukituksen ohitettaessa olet alttiinankymttmlle laseristeilylle. l katso steeseen!DK Advarse !Usynlig lase

4、rstrling ved bning nr sikkerhedsafbrydere erude af funktion. Undg udsaettelse for strling.Whenthepowersupplyisbeingturnedon,youmaynotremovethislasercautionslabel.Ifitremoves,radiationoflasermaybereceived.2.1 ESD PROTECTIONPREPARATIONOFSERVICINGPickupHeadconsistsofalaserdiodethatisverysusceptibletoex

5、ternalstaticelectrocity.Althoughitoperatesproperlyafterreplacement,ifitwassubjecttoelectrostaticdischargeduringreplacement,itslifemightbeshortened.Whenreplacing,useaconductivemat,solderingironwithgroundwire,etc.toprotectthelaserdiodeformdamagebystaticelectricity.Andalso,theLSIandICaresameasabove.Sol

6、deringironwithgroundwireorceramictypeGroundconductivewriststrapforbody.ConductivematThegroundresistancebetweenthegroundlineandthegroundislessthan101MSAFTY NOTICEPlug the AC line cord directly into a 120V AC outlet (donot use an isolation transformer for this check). Use anAC voltmeter, having 5000 p

7、er volt or more sensitivity.Connect a 1500 10W resistor,paralleled by a 0.15uF150V AC capacitor between a knomn good earth ground(water pipe, conduit, etc.) and all exposed metal parts ofcabinet (antennas, handle bracket, metal cabinetscrewheads, metal overlays, control shafts, etc.).SAFTY PRECAUTIO

8、NSLEAKAGE CURRENT CHECKMeasure the AC voltage across the 1500 resistor.The test must be conducted with the AC switch on andthen repeated with the AC switch off. The AC voltageindicated by the meter may not exceed 0.3V.A readingexceeding 0.3V indicates that a dangerous potentialexists, the fault must

9、 be located and corrected.Repeat the above test with the DVD VIDEO PLAYERpower plug reversed.NEVER RETURN A DVD VIDEO PLAYER TO THECUSTOMER WITHOUT TAKING NECESSARYCORRECTIVE ACTION.READING SHOULD NOT EXCEED 0.3VDVD VIDEO PLAYERAC OUTLETAC VOLTMETERTest all exposed metal.Voltmeter Hook-up for Leakag

10、e Current Check0.15uF 150V AC150010W(5000 per voltor more sensitivity)Good earth groundsuch as a water pipe,conduit, etc.The lightning flash with arrowhead symbol, within anequilateral triangle, is intended to alert the user to thepresence of uninsulated “dangerous voltage“ within theproducts enclos

11、ure that may be of sufficient magnitude toconstitute a risk of electric shock to persons.The exclamation point within an equilateral triangle isintended to alert the user to the presence of importantoperating and maintenance (servicing) instructions in theliterature accompanying the appliance.CAUTIO

12、NUse of controls or adjustments or performance ofprocedures other than herein may result in hazardousradiation exposure or other unsafe operation.- VOL +Volume control. Press once to stop playback and store the stop position.Press twice to stop playbackcompletely.3.0 INSTRUCTIONS FOR USE 1 23128 910

13、Skip to previous/next track or fast search backward/forward. Power /remote sensor /chargingindicator. 11MAIN UNIT CONTROLPOWER/IR/CHRConfirm selection.OKSwitch the power on/off.POWEROPENAVOUT1 2Open the disc door to insert or remove disc.Audio/Video output.Headphones jacks.OPTIONMENUAccess additiona

14、l functions. Display MENU page.4Start / pause / resume play-back.RESETIReset the player when it is hanged up.1413 DC IN 12VPower supply socket./567Up / down / left / right cursor., ,1234567891011121314SUBTITLESubtitle language selector.REMOTE CONTROL17416128910For VCD menu page.11A - BTo repeat or l

15、oop a sequencein a title.RETURNSETUPOPTIONEnter SETUP menu.Access additional functions.0 - 9Access additional functions.VOL +/-Volume control.Numeric keypad.Up / down / left / rightnavigation key. Start / pause / resume playbackMENUDisplay MENU page.15OKConfirm seletion.Mute player volumeAUDIOAudio

16、language selector.ZOOMEnlarge video image.1413Skip to next chapter, track or title.56DISPLAYAdjust the display value of the system.Skip to previous chapter, track or title.32 ,253416789101112131415164.0 MECHNICAL INSTRUCTIONSFig.1Fig.2Fig.5Fig.61. Remove screws to remove the base coverdiscreteness a

17、nd battery assy.2. Broken connections and remove screws toremove loading assy and main board as Fig.5.3. Then to remove function board as Fig.6.4. Remove screws to remove hinge adorn panel as Fig.7.5. Remove the top cover discreteness.(1).Remove speaker grill and cushion at the display frame first as Fig.8. Fig.7Fig.8(1).Remove screws at the base as Fig.1. (4).Remove the base cover discreteness and battery assy as Fig.4. (3).Open the door ,remove screws in the middle cabinet discreteness as Fig.3. (2).Remove output jack PC in the side first, then remove the screws as Fig.2. Fig.3Fig.4