Zenith DVB352 Servisní příručka

SERVICE MANUALProduct Type: DVD VIDEO PLAYERChassis: DPM-4 (MD)Manual Series: DVB352Manual Part #: 3829RGN002KModel Line: DProduct Year: 2003Summary

2. Packing Accessory SectionBATTERY808PACKING SHEET804PACKING803811812OWNER'S MANUALPLUG ASS'Y 1WAY(YELLOW)PLUG ASS'Y 2WAY810CABLE SET

3-1SECTION 3ELECTRICALCONTENTSELECTRICAL TROUBLESHOOTING GUIDE...3-21. Power check

3-2ELECTRICAL TROUBLESHOOTING GUIDENo 5V_A .No 5.2VA.Is 5.2VA section working?Is 5.2V present at emitterof Q107?Replace Q107.Is there a DC voltage At(

3-32. System operation flowPower OnNoYesYesNoNoShow LOGOTray Closed?Tray Close to Closed positionJudge whether have disc in 5 trayRecieveOPEN/ CLOSEKe

3-43. Test & debug flowTESTCheck the POWER PARTNoYesNoYesNoNoNoYesYesCheck the POWER PARTCheck the regulators or diode( D670).Check the cable conn

3-5ABRESET or Power On.Show LOGO?FlashMemory operatesproperly?Check connecti on lines between FLASH& MT1379 and the FLASH access timewhether is su

3-6BNoYesYesYesNoYesYesYesNoYesNoNoNoDoesthe SLED moveto inner side when it is atoutter positi on?Motor Driver STBYPin is High?Motor Driver STBYPin is

3-7CNoNoNoNoNoNoNoYesYesYesYesYesYesYesYesYesNoNoLaser turns on whenreading disc?LD01 or LD02 outputproperly?Check the laser power circuiton MT1336 an

3-8DYesYesNo NoYesYesYesYesYesYesYesNoNoNoNoNoFocus ON OK?Track On OK?Disc is play?EPropersignals on A, B, C,D of MT1336Check connections betweenMT133

3-9ENormalAudio outputwhen disc playback?NormalIR. VFD & Frontpannel keyfunctions?TEST ENDAudioDAC receivedcorrect data stream?NormalAudio DACout?

DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING1. SYSTEM 27MHz CLOCK,RESET,FLASH R/W SIGNAL1) MT1379 main clock is at 27MHz(X501)3.8V, 27MHzFIG 1-1

3-113) RS232 waveform during procedure(Downloading)TXD(J6 PIN3)RXD(J6 PIN 2)FIG 1-34) Flash R/W enable signal during download(Downloading)FRD(IC5A1 PI

3-122. SDRAM CLOCK1) MT1379 main clock is at 27MHz(X501)(IC502,IC503 PIN 35)DCLK = 93MHz, Vp-p=2.2, Vmax=2.7VFIG 2-13. TRAY OPEN/CLOSE SIGNAL1) Tray o

3-132) Tray close status waveformMODE1(OPEN)MODE2(CLOSE)MODE3(CHECK)TROPENFIG 3-23) Tray exchage status waveformMODE1(OPEN)MODE2(CLOSE)MODE3(CHECK)TRO

3-144. SLED CONTROL RELATED SIGNAL (NO DISC CONDITION)FMSO(2.0V/1.4V/1.0V)(IC501 PIN 19)STBY(5V) – (IC201 PIN 50)SL+(4.7V/3.6V/1.9V)(IC202 PIN 12)SL-(

3-156. LASER POWER CONTROL RELATED SIGNAL(NO DISC CONDITION)MDI1(0V/180mV)(IC201 PIN 124)LD01(5.0V//3.5V)IC201 PIN 125)LD02(5.0V/3.6V)(IC201 PIN 126)F

3-16F+(IC202 PIN 9)FE(IC201 PIN 18)RFL(IC201 PIN 19)FIG 7-2 (DVD)F+(IC202 PIN 9)FE(IC201 PIN 18)RFL(IC201 PIN 19)FIG 7-3 (CD)

3-17F+(IC202 PIN 9)FE(IC201 PIN 18)RFL(IC201 PIN 19)FIG 7-4 (CD)8. FOCUS ON WAVEFORMFE(IC201 PIN 18)FOSO(IC501 PIN12)F+(IC202 PIN 9)F-(IC202 PIN 8)FIG

3-18FE(IC201 PIN 18)FOSO(IC501 PIN12)F+(IC202 PIN 9)F-(IC202 PIN 8)FIG 8-2 (CD)9. SPINDLE CONTROL WAVEFORM (NO DISC CONDITION)DMSO(1.4V/1.8V)(IC501 PI

3-1910. TRACKING CONTROL RELATED SIGNAL(System checking)TE(IC201 PIN 21)TRSO(IC501 PIN 13)T-(IC202 PIN 7)T+(IC202 PIN 6)FIG 10-1(DVD)TE(IC201 PIN 21)T

1-1SECTION 1SUMMARYCONTENTSPRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS ... 1-2SERVICING PRECAUTIONS ...

3-2011. RF WAVEFORMRFOP(2.3V/1.1V)(IC201 PIN 6)RFON(0.8V/2.0V)(IC201 PIN 7)FIG 11-112. MT1379 AUDIO OPTICAL AND COAXIAL OUTPUT (ASPDIF)(IC501 PIN 153)

3-2113. MT1379 VIDEO OUTPUT WAVEFORM1) Full colorbar signal(CVBS)(IC604 PIN 23)DCLK = 93MHz, Vp-p=2.2, Vmax=2.7VFIG 13-12) Y(IC604 PIN 21)FIG 13-2

3-223) C(IC604 PIN 26)DCLK = 93MHz, Vp-p=2.2, Vmax=2.7VFIG 13-314. AUDIO OUTPUT FROM AUDIO DAC1) Audio L/RFIG 14-1(JK601 PIN 4,5)

3-232) Audio related SignalASDAT3(IC501 PIN 157)ABCK(IC501 PIN 148)ALRCK(IC501 PIN 149)ASDATA3FIG 14-2

3-24BLOCK DIAGRAMS1. Overall Block DiagramMMDISCSPINDLEMOTORLOADINGMOTORDECK MECHANISMDVD:RF0,A,B,C,DCD:RF0,A,B,C,D,E,FPICKUPDIG901FLD DISPLAYKEY Inp

3-252. Power(SMPS) Block Diagram5V_A / 5V_D-29VAVF+RECTIFIERLINE FILTERSWITCHING ICTRANSFEED B.REG(8V)8V5.2VAVF-RECTIFIER(FLD)RECTIFIER(9V)RECTIFIER(5

3-26IC202IC202LA6560Motor DriverDVD: A,B,C,D, RFO CD: A,B,C,D, E, F,RFOSP+, SP-M/DPICKUPX501IC501MT1379DVDPLAYERCOMBOCHIPIC201MT1336ERF SignalProcesso

3-274. MPEG & MEMORY Block DiagramIC503SDRAM16MIC505EEPROMIIC501 (MPEG + DSP )MT1379IC5A1FLASH MEMORY(8 M )IC510 (74HCT244)Voltage level shiftVID

3-285. VIDEO & AUDIO Block DiagramIC604VIDEO 6dBAmpIC601AUDIO DAC(2CH)IC301AUDIO DAC(5.1CH)IC602(OP Amp)LPF&BufferIC302(OP Amp)LPF&BufferI

1-21-3IMPORTANT SAFETY NOTICEThis manual was prepared for use only by properly trained audio-video servicetechnicians.When servicing this product, und

3-29 3-30CIRCUIT DIAGRAMS1. POWER(SMPS) CIRCUIT DIAGRAMIMPORTANT SAFETY NOTICEWHEN SERVICING THIS CHASSIS, UNDER NO CIR-CUMSTANCES SHOULD THE ORIGINAL

3-31 3-32Program download failNo Power onDigitron all not displaySystem not workingSystem not working orscreen is abnormalSystem not working orDigitro

3-33 3-343. RF & SERVO CIRCUIT DIAGRAMCD/DVD LDwill not onSR5850BDM7912N

3-35 3-364. TIMER CIRCUIT DIAGRAMDigital abnormalSystem not operate orDigitron abnormal orKey not operate.System not operateRemocon not operateSR14171

3-37 3-385. 2CH, 5.1CH CIRCUIT DIAGRAM5.1CH Audio Bad2CH Audio Bad2CH Audio BadSR5850DDM7912N

3-39 3-406. AV/JACK CIRCUIT DIAGRAMAll Video signal isn'tappear or badSR5850CDM7912NVideo Signal YVideo Signal ColorVideo Signal CVBS2CH Audio2.5

3-41 3-42PIN STOP PLAY STOP PLAY STOP PLAY STOP PLAY STOP PLAY STOP PLAY1 1.03 2.99 0 0 1.22 1.22 3.27 3.28 00002 5.11 5.08 0 0 0 0 1.18 1.26 0 0 2.59

3-43 3-44PIN STOP PLAY STOP PLAY STOP PLAY STOP PLAY STOP PLAY STOP PLAY161 0 1.27162 0 2.35163 0 0164 0 0.73165 0 3.27166 0 0.5167 0 0168 0 0.53169 0

3-45 3-46PRINTED CIRCUIT DIAGRAMS1. MAIN P.C.BOARD (TOP SIDE)LOCATION GUIDE

3-47 3-482. MAIN P.C.BOARD (BOTTOM SIDE)LOCATION GUIDE

1-3SERVICING PRECAUTIONSCAUTION : Before servicing the DVD covered by this servicedata and its supplements and addends, read and follow theSAFETY PREC

3-49 3-503 KEY P.C.BOARDLOCATION GUIDE(Solder Side)(Solder Side)4. TIMER P.C.BOARDLOCATION GUIDE

3-51 3-525. POWER P.C.BOARD LOCATION GUIDE(Solder Side)

Top View...4-1Top View(without Tray Disc) ...4-1Bottom View ...

Starting No.11,21,2,31,2,3,4666,76,7,106,7,10,116,7,8,9,10,11,121111,171,1711,15,16,17,18,19,201,1466,246,246,24,266,24,266,24,26,286,281,6,14,23,24,2

4-2DECK MECHANISM DISASSEMBLYFig. 4-1 Fig. 4-2(A)(L1)(S1)(S1)(S1)HOLDER CLAMPPLATE CLAMPPLATE CLAMPMAGNET CLAMPUPPER CLAMPHOLDER CLAMPBASE MAINBASE AS

4-3DECK MECHANISM DISASSEMBLYFig. 4-3(S7)(S7)(S7)(S7)(S8)GEAR ASSEMBLY RACK RUBBER DAMPERGEAR MIDDLEGEAR ASSEMBLY FEEDRUBBER REARBASE PU(OUTSERT)RUBB

4-4DECK MECHANISM DISASSEMBLY(S10)Fig.(B)(S15)(S15)(S14)(S13)GEAR SLIDERGEAR MAINGEAR EXCHANGEGEAR LOADINGGEAR WHEEL MAINMOTOR ASSEMBLY MAINBASE MAIN

EXPLODED VIEWS1. Deck Mechanism Exploded View011031001003004026025002414415415413413413414414416032034033035416416416416037030022023021020036A01A02A04

1-4SPECIFICATIONS• GENERALPower requirements AC 120 V, 60 HzPower consumption 14W Dimensions (Approx.) 440 X 80 X 425 mm (17.3 x 3.1 x 16.7 inches) (w

5-1SECTION 5 REPLACEMENT PARTS LISTMODELS : A) DVB352(DM7912NM) HA1UZZ(ZENITH)RUN DATE:18.JULY.2003.MECHANICAL SECTION NSP:Not Service PartS AL LOCA N

5-2S AL LOCA NO LG PART NO A DESCRIPTION SPECIFICATION REMARKSSCREW413 4000R-0006A O SCREW Audio TAPTITE 3*8(353-025B)414 353-051E O SCREW SPECIAL (3X

5-3.ELECTRICAL SECTIONS AL LOCA NO LG PART NO A DESCRIPTION SPECIFICATION REMARKSBC101 636-004C O FILTER(CIRC),EMC BEAD CORE BFS3550R2FD8,R T/PBD101 0

5-4S AL LOCA NO LG PART NO A DESCRIPTION SPECIFICATION REMARKSC255 0CH1104K942 O CAPACITOR,CHIP[CERAMIC M/L HD 0.1UF 50V Z Y5V(F) 1508 R/TPC257 0CH110

5-5S AL LOCA NO LG PART NO A DESCRIPTION SPECIFICATION REMARKSC425 0CH1392K562 O CAPACITOR,FIXED CERAMIC(Temp.c 3900PF 50V K Z5U(E) 1608 R/TPC426 0CE2

5-6S AL LOCA NO LG PART NO A DESCRIPTION SPECIFICATION REMARKSC566 0CH4221K412 O CAPACITOR,CHIP[CERAMIC M/L TC 220P 50V J COG 1.6X0.8 R/TPC567 0CH4221

5-7S AL LOCA NO LG PART NO A DESCRIPTION SPECIFICATION REMARKSC901 0CN1040K948 O CAPACITOR,FIXED TUBULAR(High d 0.1UF D 50V 80%,-20% F(Y5V) TAC905 0CN

5-8S AL LOCA NO LG PART NO A DESCRIPTION SPECIFICATION REMARKSL103 633-088G O COIL,CHOKE CHOCK(22MH) 5MM TOKO TPL105 633-088G O COIL,CHOKE CHOCK(22MH

5-9S AL LOCA NO LG PART NO A DESCRIPTION SPECIFICATION REMARKSR124 0RD1800F608 O RESISTOR,FIXED CARBON FILM 180 OHM 1/6 W 5% TA26R125 0RD3901F608 O RE

5-10S AL LOCA NO LG PART NO A DESCRIPTION SPECIFICATION REMARKSR256 0RH1002C622 O RESISTOR,METAL GLAZED(CHIP) 10K OHM 1 / 16 W 1608 5.00% DR257 0RH100

2-1SECTION 2CABINET & MAIN CHASSISCONTENTS1. EXPLODED VIEWS ...

5-11S AL LOCA NO LG PART NO A DESCRIPTION SPECIFICATION REMARKSR527 0RH4701C622 O RESISTOR,METAL GLAZED(CHIP) 4.7K OHM 1 / 16 W 1608 5.00% DR528 0RH12

5-12S AL LOCA NO LG PART NO A DESCRIPTION SPECIFICATION REMARKSR6W4 0RH1100C622 O RESISTOR,METAL GLAZED(CHIP) 110 OHM 1 / 16 W 1608 5.00% DR6W5 0RH022

2-2EXPLODED VIEWS1. Cabinet and Main Frame Section465465250462462300DIG901465261260275463463465467463463463A00A47A46A48A43A42A49283280452452320261A261

2-3• Cabinet and Main Frame Section• Cabinet and Main Frame Section Part ListS AL LOCA NO LG PART NO A DESCRIPTION SPECIFICATION REMARKSASSEMBLY PARTS