Zenith-DVB413-dvd-sm 维修电路原理图.pdf

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1、SERVICE MANUALProduct Type: DVD VIDEO PLAYERChassis: DP-8Manual Series: DVB413Manual Part #: 3829RHP027DModel Line: DProduct Year: 2004SummaryCabinet & Main ChassisElectricalMechaunismParts List12345Published April 2004by Technical PublicationsZenith Electronics Corporation201 James Record RoadHunts

2、ville, Alabama 35824-1513Copyright 2004 by Zenith Electronics CorporationPrinted in U.S.AModel Series: CONTENTSDVB413.RadioFans.CN 收音机爱 好者资料库CONTENTSSECTION 1 . . . .SUMMARYSECTION 2 . . . .CABINET & MAIN CHASSISSECTION 3 . . . .ELECTRICALSECTION 4 . . . .MECHANISMSECTION 5 . . . .REPLACEMENT PARTS

3、LISTRadioFans.CN 收音机爱 好者资料库SECTION 1SUMMARYCONTENTSPRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS. 1-3SERVICING PRECAUTIONS. 1-4 General Servicing Precautions Insulation Checking Prodedure Electrostatically Sensitive DevicesSPECIFICATIONS. 1-51-21-3IMPORTANT SAFETY NOTICEThis manual was prep

4、ared for use only by properly trained audio-video 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

5、original circuit and their physical location, wiring and lead dressmust conform to original layout upon completion of repairs.Special components are also used to prevent x-radiation, shock and fire haz-ard. These components are indicated by the letter “x” included in their compo-nent designators and

6、 are required to maintain safe performance. No deviationsare allowed 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 changesinto the set is not del

7、ayed until the new service literature is printed.CAUTION: Do not attempt to modify this product in any way. Never performcustomized installations without manufacturers approval. Unauthorized modi-fications will not only void the warranty, but may lead to property damage oruser injury.Service work sh

8、ould be performed only after you are thoroughly familiar withthese safety checks and servicing guidelines.GRAPHIC SYMBOLSThe exclamation point within an equilateral triangle is intended toalert the service personnel to important safety information in theservice literature.The lightning flash with ar

9、rowhead symbol within an equilateral tri-angle is intended to alert the service personnel to the presence ofnoninsulated “dangerous voltage” that may be of sufficient magni-tude to constitute a risk of electric shock.The pictorial representation of a fuse and its rating within an equi-lateral triang

10、le is intended to convey to the service personnel thefollowing fuse replacement caution notice: CAUTION: FOR CONTINUED PROTECTION AGAINST RISKOF FIRE, REPLACE ALL FUSES WITH THE SAME TYPE ANDRATING AS MARKED NEAR EACH FUSE.SERVICE INFORMATIONWhile servicing, use an isolation transformer for protecti

11、on from AC line shock.After the original service problem has been corrected, make a check of the fol-lowing:FIRE AND SHOCK HAZARD1. Be sure that all components are positioned to avoid a possibility of adjacentcomponent shorts. This is especially important on items trans-ported to andfrom the repair

12、shop.2. Verify that all protective devices such as insulators, barriers, covers, shields,strain reliefs, power supply cords, and other hardware have been reinstalledper the original design. Be sure that the safety purpose of the polarized lineplug has not been defeated.3. Soldering must be inspected

13、 to discover possible cold solder joints, soldersplashes, or sharp solder points. Be certain to remove all loose foreign par-ticles.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 necess

14、ary.5. No lead or component should touch a high current device or a resistor ratedat 1 watt or more. Lead tension around protruding metal surfaces must beavoided.6. After reassembly of the set, always perform an AC leakage test on allexposed metallic parts of the cabinet (the channel selector knobs,

15、 antennaterminals, handle and screws) to be sure that set is safe to operate withoutdanger of electrical shock. DO NOT USE A LINE ISOLATION TRANS-FORMER DURING THIS TEST. Use an AC voltmeter having 5000 ohms pervolt or more sensitivity in the following manner: Connect a 1500 ohm, 10watt resistor, pa

16、ralleled by a .15 mfd 150V AC type capacitor between aknown good earth ground water pipe, conduit, etc.) and the exposed metal-lic parts, one at a time. Measure the AC voltage across the combination of1500 ohm resistor and .15 mfd capacitor. Reverse the AC plug by using anon-polarized adaptor and re

17、peat AC voltage measurements for eachexposed metallic part. Voltage measured must not exceed 0.75 volts RMS.This corresponds to 0.5 milliamp AC. Any value exceeding this limit consti-tutes a potential shock hazard and must be corrected immediately.TIPS ON PROPER INSTALLATION1. Never install any rece

18、iver in a closed-in recess, cubbyhole, or closely fittingshelf space over, or close to, a heat duct, or in the path of heated air flow.2. Avoid conditions of high humidity such as: outdoor patio installations wheredew is a factor, near steam radiators where steam leakage is a factor, etc.3. Avoid pl

19、acement 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 kit mustfollow the factory-approved mounting instructions. A product mounte

20、d to ashelf or platform must retain its original feet (or the equivalent thickness inspacers) to provide adequate air flow across the bottom. Bolts or screwsused for fasteners must not touch any parts or wiring. Perform leakage testson customized installations.5. Caution customers against mounting a

21、 product on a sloping shelf or in a tilt-ed 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 small cast-ers across thresholds or deep pile carpets.7. Caut

22、ion customers against using extension cords. Explain that a forest ofextensions, sprouting from a single outlet, can lead to disastrous conse-quences to home and family.A.C. Voltmeter1500 OHM10 WATTPlace this probeon each exposedmetal part.Good Earth Groundsuch as the WaterPipe, Conduit, etc.0.15uFP

23、RODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS1-4SERVICING PRECAUTIONSCAUTION : Before servicing the DVD covered by this servicedata and its supplements and addends, read and follow theSAFETY PRECAUTIONS. NOTE : if unforeseen circum-stances create conflict between the following servicing pre-

24、cautions and any of the safety precautions in this publica-tions, always follow the safety precautions.Remembers Safety First:General Servicing Precautions1. Always unplug the DVD AC power cord from the ACpower source before:(1)Removing or reinstalling any component, circuit board, module, or any ot

25、her assembly.(2)Disconnection or reconnecting any internal electricalplug 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 resultin an explo

26、sion 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 appropriate contact cleaning solution to the contacts with a pipe cleaner,cotton-tipped swab, or comparable soft applicator.Un

27、less specified otherwise in this service data, lubricationof contacts is not required.4. Do not defeat any plug/socket B+ voltage interlocks withwhitch instruments covered by this service manual mightbe equipped.5. Do not apply AC power to this DVD and/or any of itselectrical assemblies unless all s

28、olid-state device heatsinks are cerrectly installed.6. Always connect test instrument ground lead to theappropriate ground before connection the test instrumentpositive lead. Always remove the test instrument ground lead last.Insulation Checking ProcedureDisconnect the attachment plug from the AC ou

29、tlet and turnthe 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

30、pan-els, Input terminals, Earphone jacks, etc.Electrostatically Sensitive (ES) DevicesSome semiconductor (solid state) devices can be damagedeasily by static electricity. Such components commonly arecalled Electrostatically Sensitive (ES) Devices. Examples oftypical ES devices are integrated circuit

31、s and some fieldeffect transistors and semiconductor chip components.The following techniques should be used to help reduce theincidence of component damage caused by static electricity.1. Immediately before handling any semiconductor compo-nent or semiconductor-equipped assembly, drain off anyelect

32、rostatic charge on your body by touching a knownearth 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 assembly equipped

33、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 grouned-tip soldering iron to solder or unsolderES devices.4. Use only an anti-static solder removal device. Somesolder removal devices

34、 not classified a “anti-static” cangenerate electrical charges sufficient to damage ES devices.5. Do not use freon-propelled chemicals. These cangenerate electrical charge sufficient to damage ESdevices.6. Do not remove a replacement ES device from its protective package until immediately before you

35、 are ready toinstall it. (Most replacement ES devices are packaged withleads electrically shorted together by conductive foam,aluminum foil, or comparable conductive material).7. Immediately before removing the protective material fromthe leads of a replacement ES device, touch the protectivemateria

36、l to the chassis or circuit assembly into which thedevice will be installed.Caution : Be sure no power is applied to the chassis orcircuit, and observe all other safety precautions.8. Minimize bodily motions when handling unpackaged replacement ES devices. (Normally harmless motion such as the brush

37、ing together of your clothes fabric or the liftingof your foot from a carpeted floor can generate static elec-tricity sufficient to damage an ES device.)1-5SPECIFICATIONS GENERALPower requirements:AC 120 V , 60 HzPower consumption:12W Dimensions (Approx.):430 x 39 x 242 mm (W x H x D) without foot W

38、eight (Approx.): 2.2 kgOperating temperature:5 C to 35 C (41 F to 95 F)Operating humidity: 5 % to 90 % OUTPUTSVIDEO OUT:1 Vp-p 75 , sync negative, RCA jack x 1/ SCART (TO TV)AUDIO OUT:2.0 Vrms (1 KHz, 0 dB), 600 , RCA jack (L, R) x 1/ SCART (TO TV)DIGITAL OUT (COAXIAL):0.5 V (p-p), 75 , RCA jack x 1

39、 SystemLaser: Semiconductor laser, wavelength 650 nmSignal system: PAL / NTSCFrequency response:DVD (PCM 96 kHz): 8 Hz to 44 kHz DVD (PCM 48 kHz): 8 Hz to 22 kHzCD: 8 Hz to 20 kHzSignal-to-noise ratio:More than 100 dB (ANALOG OUT connectors only)Harmonic distortion: Less than 0.008%Dynamic range:Mor

40、e than 90 dB (DVD/CD) AccessoriesVideo cable (1), Audio cable (1), Remote control (1), Batteries (2)2-1SECTION 2CABINET & MAIN CHASSISCONTENTS1. EXPLODED VIEWS.2-21. Cabinet and Main Frame Section.2-22. Packing Accessory Section.2-32-2EXPLODED VIEWS1. Cabinet and Main Frame Section463A00283A41279A47

41、261261261261260A49A43A44A42280A48A46467320463463300452452465463463250KARAOKE MODELONLYSCART, 5.1CHMODELONLYA54321BCD2-32. Packing Accessory SectionBATTERY808PACKING SHEET804PACKINGOPTIONAL PARTS803806820OWNERS MANUALRF CABLE810 CABLE SET ASSY801REMOCON900BOX CARTON802PACKING803811812PLUG ASSY 1WAY(Y

42、ELLOW)PLUG ASSY 1WAY(BLACK)PLUG ASSY 2WAY3-1SECTION 3ELECTRICALCONTENTSELECTRICAL TROUBLESHOOTING GUIDE.3-21. Power check flow.3-22. System operation flow .3-33. Test & debug flow.3-44. KARAOKE Flow (KARAOKE MODEL ONLY).3-10DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING.3-111. SYSTEM 27MHz CLOCK

43、, RESET SIGNAL.3-112. SDRAM CLOCK.3-123. TRAY OPEN/CLOSE SIGNAL.3-124. SLED CONTROL RELATED SIGNAL(NO DISC CONDITION).3-145. LENS CONTROL RELATED SIGNAL(NO DISC CONDITION).3-146. LASER POWER CONTROL RELATED SIGNAL(NO DISC CONDITION).3-157. DISC TYPE JUDGEMENT WAVEFORM.3-168. FOCUS ON WAVEFORM.3-179.

44、 SPINDLE CONTROL WAVEFORM(NO DISC CONDITION.3-1810. TRACKING CONTROL RELATED SIGNAL(System checking).3-1911. RF WAVEFORM .3-2012. M3355 AUDIO OPTICAL AND COAXIAL OUTPUT(ASPDIF).3-2013.M3355 VIDEO OUTPUT WAVEFORM.3-2114. AUDIO OUTPUT FROM AUDIO DAC .3-22BLOCK DIAGRAMS.3-241. Overall Block Diagram .3-

45、24 2. Power(SMPS) Block Diagram.3-25 3. SERVO Block Diagram.3-264. MPEG & MEMORY Block Diagram.3-275. VIDEO & AUDIO Block Diagram.3-28 6. KARAOKE Block Diagram(KARAOKE MODEL ONLY).3-29CIRCUIT DIAGRAMS.3-301. Power(SMPS) Circuit DIAGRAM.3-302. AV/JACK Circuit DIAGRAM.3-323. SYSTEM Circuit DIAGRAM .3-

46、344. DRIVER Circuit DIAGRAM.3-365. TIMER Circuit DIAGRAM.3-386. 5.1CH, SCART Circuit DIAGRAM .3-407. KARAOKE Circuit DIAGRAM(KARAOKE MODEL ONLY).3-42 CIRCUIT VOLTAGE CHART .3-44PRINTED CIRCUIT DIAGRAMS.3-501. MAIN P.C.BOARD.3-502. KEY P.C.BOARD.3-523. TIMER P.C.BOARD.3-534. SMPS P.C.BOARD.3-543-2ELE

47、CTRICAL TROUBLESHOOTING GUIDENo 5V_ANo 5.2VAIs 5.2VA section working?Is 5.2V present at emitterof Q107?Replace Q107.Is there a DC voltage At(+) terminal of BD101?Is there a DC voltage atR101?Replace IC101.Check F1011. Power check flowNo VF+Is 5.2VA section working?Replace D102.Check F102NONOYESYESYE

48、SYESReplace R101.YESReplace BD101.YESYESA.B.NONONONO3-33-32. System operation flowPower on1.initializes SERVO, DSP and RISC registers2.write RISC code to SDRAM 3.Reset RISCShow LOGOSLED at Inner Side?SLED Moves to Inner PositionTray Closed?Tray Close to closed position1.Judge whether have disc and d

49、isc type 2.Jump to related disc reading procedure ReceivedOpen/close key?1.Execute Pressed Key and IR Key2.System operation on routine loop 1.Stop playback and open tray2.Display tray open message and LOGOReceiveclose key?noyesnoyesnoyesnoyes3-43. Test & debug flowTestCheck the AC Voltage(110V or 22

50、0V)Switch on the Power PCBACheck the Power PARTIs the DC Voltage Outputs OK? (5.2V,5V,1.8V,3.3V,8V,12V)Check the Power PARTIs 3.3V, 1.8V,5V,12V and 8V outputs normal on main PCBCheck the IC105 or diodeConnect to PC RS232 Cable andUpdate the flash memory codeUpdateFlash(IC502)Successfully?A1.Check 27