Zenith-DVD5201-cd-sm 维修电路原理图.pdf

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1、SERVICE MANUALProduct Type:DVD PlayerChassis:DVD2Manual Series: VR166Manual Part #: 923-03461Model Line:DProduct Year:2001OVERVIEW .5DISASSEMBLY .8MECHANISM .10ELECTRICAL. 14PARTS.28DIAGRAMS .37SCHEMATICS .38Published by Technical PublicationsZenith Electronics CorporationP.O. Box 240007Huntsville,

2、Alabama 35824Copyright June 2001 by Zenith Electronics CorporationMade/Printedin the U.S.A.Model Series:CONTENTSDVD5201DVD5591RadioFans.CN 收音机爱 好者资料库VR166 - 923-03461 2 DVD2 - SAFETYPRODUCT SAFETY GUIDELINESIMPORTANT SAFETY NOTICEThis manual was prepared for use only by properly trained audio-visual

3、 servicetechnicians.When servicing this product, under no circumstances should the originaldesign be modified or altered without permission from Zenith ElectronicsCorporation. All components should be replaced only with types identical tothose in the original circuit and their physical location, wir

4、ing and lead dressmust conform to original layout upon completion of repairs.Special components are also used to prevent x-radiation, shock and fire hazard.These components are indicated by the letter “x” included in their componentdesignators and are required to maintain safe performance. No deviat

5、ions areallowed without prior approval by Zenith Electronics Corporation.Circuit diagrams may occasionally differ from the actual circuit used. This way,implementation of the latest safety and performance improvement changes intothe set is not delayed until the new service literature is printed.CAUT

6、ION: Do not attempt to modify this product in any way. Never performcustomized installations without manufacturers approval. Unauthorizedmodifications will not only void the warranty, but may lead to property damageor user injury.Service work should be performed only after you are thoroughly familia

7、r withthese safety checks and servicing guidelines.GRAPHIC SYMBOLSThe exclamation point within an equilateral triangle is intendedto alert the service personnel to important safety information inthe service literature.The lightning flash with arrowhead symbol within an equilateraltriangle is intende

8、d to alert the service personnel to the presenceof noninsulated “dangerous voltage” that may be of sufficientmagnitude to constitute a risk of electric shock.The pictorial representation of a fuse and its rating within anequilateral triangle is intended to convey to the service personnelthe followin

9、g fuse replacement caution notice:CAUTION: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE,REPLACE ALL FUSES WITH THE SAME TYPE AND RATING AS MARKEDNEAR EACH FUSE.SERVICE INFORMATIONWhile servicing, use an isolation transformer for protection from AC line shock.After the original service problem has b

10、een corrected, make a check of thefollowing:FIRE AND SHOCK HAZARD1. Be sure that all components are positioned to avoid a possibility ofadjacent component shorts. This is especially important on items trans-ported to and from the repair shop.2. Verify that all protective devices such as insulators,

11、barriers, covers,shields, strain reliefs, power supply cords, and other hardware have beenreinstalled per the original design. Be sure that the safety purpose of thepolarized line plug has not been defeated.3. Soldering must be inspected to discover possible cold solder joints, soldersplashes, or sh

12、arp solder points. Be certain to remove all loose foreignparticles.4. Check for physical evidence of damage or deterioration to parts and compo-nents, for frayed leads or damaged insulation (including the AC cord), andreplace if necessary.5. No lead or component should touch a receiving tube or a re

13、sistor rated at1 watt or more. Lead tension around protruding metal surfaces must beavoided.6. After reassembly of the set, always perform an AC leakage test on all exposedmetallic parts of the cabinet (the channel selector knobs, antenna terminals,handle and screws) to be sure that set is safe to o

14、perate without danger ofelectrical shock. DO NOT USE A LINE ISOLATION TRANSFORMER DURING THISTEST. Use an AC voltmeter having 5000 ohms per volt or more sensitivity inthe following manner: Connect a 1500 ohm, 10 watt resistor, paralleled bya .15 mfd 150V AC type capacitor between a known good earth

15、groundwater pipe, conduit, etc.) and the exposed metallic parts, one at a time.Measure the AC voltage across the combination of 1500 ohm resistor and.15 mfd capacitor. Reverse the AC plug by using a non-polarized adaptorand repeat AC voltage measurements for each exposed metallic part. Voltagemeasur

16、ed must not exceed 0.75 volts RMS. This corresponds to 0.5 milliampAC. Any value exceeding this limit constitutes a potential shock hazard andmust be corrected immediately.X-RADIATION1.Be sure procedures and instructions to all service personnel cover thesubject of x-radiation. The only potential so

17、urce of x-rays in current TVreceivers is the picture tube. However, this tube does not emit x-rays whenthe HV is at the factory-specified level. The proper value is given in theapplicable schematic. Operation at higher voltages may cause a failure ofthe picture tube or high-voltage supply and, under

18、 certain circumstancesmay produce radiation in excess of desirable levels.2.Only factory-specified CRT anode connectors must be used.3.It is essential that the service personnel have available an accurate andreliable high-voltage meter.4.When the high-voltage circuitry is operating properly, there i

19、s no possibilityof an x-radiation problem. Every time a color chassis is serviced, thebrightness should be run up and down while monitoring the high voltagewith a meter, to be certain that the high voltage does not exceed thespecified value and that it is regulating correctly.5.When troubleshooting

20、and making test measurements in a product with aproblem of excessively high voltage, avoid being unnecessarily close tothe picture tube and the high voltage power supply. Do not operate theproduct longer than necessary to locate the cause of excessive voltage.6.Refer to HV, B+, and shutdown adjustme

21、nt procedures described in theappropriate schematics and diagrams (where used).IMPLOSION1.All direct view picture tubes are equipped with an integral implosionprotection system; take care to avoid damage during installation.2.Use only the recommended factory replacement tubes.TIPS ON PROPER INSTALLA

22、TION1.Never install any receiver in a closed-in recess, cubbyhole, or closelyfitting shelf space over, or close to, a heat duct, or in the path of heatedair flow.2.Avoid conditions of high humidity such as: outdoor patio installationswhere dew is a factor, near steam radiators where steam leakage is

23、 a factor,etc.3.Avoid placement where draperies may obstruct venting. The customershould also avoid the use of decorative scarves or other coverings thatmight obstruct ventilation.4.Wall- and shelf-mounted installations using a commercial mounting kitmust follow the factory-approved mounting instruc

24、tions. A product mountedto a shelf or platform must retain its original feet (or the equivalentthickness in spacers) to provide adequate air flow across the bottom. Boltsor screws used for fasteners must not touch any parts or wiring. Performleakage tests on customized installations.5.Caution custom

25、ers against mounting a product on a sloping shelf or in atilted position, unless the receiver is properly secured.6.A product on a roll-about cart should be stable in its mounting to the cart.Caution the customer on the hazards of trying to roll a cart with smallcasters across thresholds or deep pil

26、e carpets.7.Caution customers against using a cart or stand that has not been listedby Underwriters Laboratories, Inc. for use with its specific model oftelevision receiver or generically approved for use with TVs of the same orlarger screen size.8.Caution customers against using extension cords. Ex

27、plain that a forest ofextensions, sprouting from a single outlet, can lead to disastrousconsequences to home and family.A.C. Voltmeter1500 OHM10 WATTPlace this probeon each exposedmetal part.Good Earth Groundsuch as the WaterPipe, Conduit, etc.0.15uFRadioFans.CN 收音机爱 好者资料库VR166 - 923-03461 3 DVD2 -

28、TOCTABLE OF CONTENTSOVERVIEW .5FEATURES .5SPECIFICATIONS .5OUTPUTS .5PACKAGE CONTENTS.6SERVICING PRECAUTIONS.7GENERAL SERVICING PRECAUTIONS .7INSULATION CHECKING PROCEDURE.7ELECTROSTATICALLY SENSITIVE (ES) DEVICES .7DISASSEMBLY .8MECHANISM .10ELECTRICAL. 14BLOCK DIAGRAMS . 14TROUBLESHOOTING . 18PART

29、S.28DIAGRAMS .37DVD5201/5591 EXPLODED VIEW .37SCHEMATICS .38DVD5201/5591 POWER SUPPLY CIRCUIT .38DVD5201/5591 DVD AND DSP CIRCUIT .39DVD5201/5591 DRIVE AND RF CIRCUIT .40DVD5201/5591 MICRO CIRCUIT.41DVD5201/5591 MEMORY CIRCUIT .42DVD5201/5591 TIMER CIRCUIT .43DVD5201 AUDIO/VIDEO CIRCUIT.44DVD5591 AU

30、DIO/VIDEO CIRCUIT.45DVD5201 JACK CIRCUIT .46DVD5591 JACK CIRCUIT .47DVD5201/5591 MAIN PCB LAYOUT .48DVD5201/5591 PCB LAYOUTS.49OVERVIEWVR166 - 923-03461 5 DVD2 - OVERVIEWFEATURES5 Disc ChangerMP3 DecodingDTS/Dolby Digital CapableComponent Video OutputUniversal Remote Control with ShuttleZoom (4X, 16

31、X)Still Pause and Frame AdvanceEZ Search, EZ Scan with MarkerAutomatic Aspect Ratio ControlParental ControlSPECIFICATIONSPower supply . AC120V, 60HzPower consumption . 16WMass . 5.7kg(12.6lbs)External dimensions . 430 x 118 x 381 (W x H x D)Signal system. NTSCLaser Semiconductor. lDVD Semiconductor

32、laser, wavelength 650nmFrequency range (audio). 4Hz - 20kHzSignal-to-noise ratio (audio) . More than 100dB (EIAJ)Audio dynamic range (audio). More than 90dB (EIAJ)Harmonic distortion (audio) . 0.008%Wow and flutter . Below measurable level (less than +0.001%(W.PEAK)(EIAJ)Operations Temperature : . 5

33、C(41F) to 35C(95F),Operation status : . HorizontalOUTPUTSVideo outputs. 1.0V(p-p), 75W, negative sync., RCA jack x 1S video outputs . (Y)1.0V(p-p), 75W, negative sync, Mini DIN 4-pin x 1(C)0.286V(p-p), 75WComponent video output. (Y)1.0V(p-p), 75W,negative sync., RCA jack x 1 (Pb)/(Pr) 0.7V(p-p), 75W

34、Audio output (digital audio) . 0.5V(p-p), 75W, RCA jack X 1Audio output (analog audio) . 2.0Vrms (1kHz, 0dB), 330W, RCA jack (L, R) x 2*Designs and specifications are subject to change without notice.*Weight and dimensions shown are approximate.OVERVIEWVR166 - 923-03461 6 DVD2 - OVERVIEWOVERVIEWPACK

35、AGE CONTENTSBATTERY 808 PACKING SHEET 804 PACKING OPTIONAL PARTS 803 811 812 OWNERS MANUAL 810 CABLE SET ASSY 801 REMOCON 900 BOX CARTONX 802 PACKING 803 VR166 - 923-03461 7 DVD2 - SERVICINGSERVICINGSERVICING PRECAUTIONSBefore servicing the DVD covered by this service data(and its supplements and ad

36、dendums), read and followthe safety precautions. If unforeseen circumstances createconflict between the following servicing precautions andany of the safety precautions in this publication, alwaysfollow the safety precautions. Remember, safety first.GENERAL SERVICING PRECAUTIONS1) Always unplug the

37、DVD AC power cord from the ACpower source before:a) Removing or reinstalling any component, circuitboard, module, or any other assembly.b) Disconnection or reconnecting any internal elec-trical plug or other electrical connection.c) Connecting a test substitute in parallel with an elec-trolytic capa

38、citor.Caution: A wrong part substitution or incorrect polarityinstallation of electrolytic capacitors may result inan explosion hazard.2) Do not spray chemicals on or near this DVD or any ofits assemblies.3) Unless specified otherwise in this service data, cleanelectrical contacts by applying an app

39、ropriate con-tact cleaning solution to the contacts with a pipecleaner, cotton-tipped swab, or comparable soft ap-plicator. Unless specified otherwise in this servicedata, lubrication of contacts is not required.4) Do not defeat any plug/socket B+ voltage interlockswith which instruments covered by

40、this service manualmight be equipped.5) Do not apply AC power to this DVD and/or any of itselectrical assemblies unless all solid-state device heatsinks are correctly installed.6) Always connect test instrument ground lead to theappropriate ground before connection the test in-strument positive lead

41、. Always remove the test in-strument ground lead last.INSULATION CHECKING PROCEDUREDisconnect the attachment plug from the AC outlet andturn the power on. Connect an insulation resistance meter(500V) to the blades of the attachment plug. Theinsulation resistance between each blade of theattachment p

42、lug and accessible conductive parts shouldbe more than 1M-ohm. Accessible Conductive Partsincluding Metal pan-els, Input terminals, Earphone jacks,etc.ELECTROSTATICALLY SENSITIVE (ES) DEVICESSome semiconductor (solid state) devices can bedamaged easily by static electricity. Such componentscommonly

43、are called Electrostatically Sensitive (ES)Devices. Examples of typical ES devices are integratedcircuits and some field effect transistors andsemiconductor chip components. The followingtechniques should be used to help reduce the incidenceof component damage caused by static electricity.1) Immedia

44、tely before handling any semiconductor com-ponent or semiconductor-equipped assembly, drainoff any electrostatic charge on your body by touch-ing a known earth ground. Alternatively, obtain andwear a commercially available discharging wrist strapdevice, which should be removed for potential shockrea

45、sons prior to applying power to the unit undertest.2) After removing an electrical assembly equipped withES devices, place the assembly on a conductive sur-face such as aluminum foil, to prevent electrostaticcharge buildup or exposure of the assembly.3) Use only a GROUNDED-tip soldering iron to sold

46、er orunsolder ES devices.4) Use only an anti-static solder removal device. Somesolder removal devices not classified a “anti-static”can generate electrical charges sufficient to damageES devices.5) Do not use freon-propelled chemicals. These can gen-erate electrical charge sufficient to damage ES de

47、-vices.6) Do not remove a replacement ES device from its pro-tective package until immediately before you are readyto install it. (Most replacement ES devices are pack-aged with leads electrically shorted together by con-ductive foam, aluminum foil, or comparable conduc-tive material).7) Immediately

48、 before removing the protective materialfrom the leads of a replacement ES device, touch theprotective material to the chassis or circuit assemblyinto which the device will be installed.Caution: Be sure no power is applied to the chassis orcircuit, and observe all other safety precautions.8) Minimiz

49、e bodily motions when handling unpackagedreplacement ES devices. (Normally harmless motion suchas the brushing together of your clothes fabric or thelifting of your foot from a carpeted floor can gener-ate static electricity sufficient to damage an ES de-vice.)VR166 - 923-03461 8 DVD2 - SERVICINGCHA

50、SSISDISASSEMBLY(L1)(L1)(B)(B)(C)(C)(C)(F)(F)(F)(F)(B)(B)(D)(E)(D)(D)(D)(E)(E)(B)(B)(G)(G)(G)(G)(G)(G)Fig. 2-4Fig. 2-51. Disassemble Main circuit board, Jackcircuit board, Power circuit board andMD Assy DPM1. 1. Remove the top case.(See Fig. 2-1)2. Remove 10 screws (B).3. Disassemble Main circuit boa