Toshiba TW40F80 User Manual

TECHNICAL TRAINING MANUALN5SS CHASSISNTDPJTV05TW40F80PROJECTION TELEVISIONOnly the different points from the training manual “N5SS chassis” with its f

107. CHASSIS LAYOUT-3:CRT-D(B)5-2:CRT-D(G)5-1:CRT-D(R)5- 6 : SVM5FOCUS PACK- 4 : FRONT-LED5- 5 : FRONT-CON5: POWER 16F.B.TJ-BOXTo CRTTo FOCUSPACK3302

1007. CONVERGENCE TROUBLESHOOTING CHARTFig. 11-6Pump-upConvergence output signals correction wave+30V-15V0VVerticalQ751(R/G/B)HorizontalQ752(R/G/B)Rer

RFSWH003ANT1ANT2HY01TUNER/IFSCLSDA ATF2TV2-VTUNERSCL SDAH001 H002TUNERSDASCLATF1RWL L RTV1-V, L, RFRONTSURROUNDUNITLRLRSURROUNDSWAFT2AFT1I C STOPSCL

118. CONSTRUCTION OF CHASSISA110A110B2pcs K601A520PP 5x184pcsA110AA126A505BIDT24x12 2pcsA101A401A522BIDT24X12 18pcsA517A353A517PBI 4X168pcsB202A351A

121. CIRCUIT BLOCKFig. 2-1 Block diagram1-1. Outline(1) RF signals sent from an antenna are converted into in-termediate frequency band signals (vide

131-3. Audio Multiplex Demodulation CircuitThe sound multiplex composite signal FM-detected in thePIF circuit enters pin 12 of HIC (hybrid IC) in pass

141-4. A.PRO Section (Audio Processor)The S.PRO section has following functions.(1) Woofer processing (L+R output)(2) High band, low band, balance con

15Fig. 2-4Configuration of the audio circuit and signal flow are givenin Fig. 2-4A/V PCBICV01VIF+MTS+S.PROMODULERLRLLRLRLRLRLRMOTHERTVCHILDTVPIPOUTPUT

162. POP TUNERTUNERSECTIONSAWFILTERVIF/SIFCIRCUITRF AGCAFTOUTPUTVIDEOOUTPUTAUDIOOUTPUTFig. 2-52-1. OutlineThe POP tuner (EL922L) consists of a tuner a

17POP and Double Window signal processing (QY03), IC forclosed caption control (QM01), IC for WAC control (QX01),IC for 3D-YCS (QZ01), IC for AUTOLIVE

18Fig. 3-13. MICROCOMPUTERMicrocomputer TMP87CS38N-3320 has 60k byte of ROMcapacity and equipped with OSD function inside.The specification is as foll

19Fig. 3-24. MICROCOMPUTER TERMINAL FUNCTIONTMP87CS38N3320 (QA01)IOOOOOOOIOIOI 0IIIIOOIIIIOOIIIIOIIOII 0OIOOGNDP40 (PWM0)P41 (PWM1)P42 (PWM2)P43 (PWM

ContentsSECTION I: OUTLINE... 61. FEATURE...

20<< MICROCOMPUTER TERMINAL NAME AND OPERATION LOGIC >>No. Terminal Name Function In/Out Logic Remarks1 GND 0V2 BAL INPUT BALANCE Out PWM

215. EEPROM (QA02)EEPROM (Non volatile memory) has function which, in spiteof power-off, memorizes the such condition as channel se-lecting data, last

227. SYSTEM BLOCK DIAGRAMSCL 011SDA 012VSYNC27INT440RMT OUT3MUTE4SP MUTE5V.sync pulseAudio muteSpeaker muteRemote controlleroutput65QA02Memory24L

238. LOCAL KEY DETECTION METHODLocal key detection in the N5SS chassis is carried out byusing analog like method which detects a voltage appears atloc

249. REMOTE CONTROL CODE ASSIGNMENTCustom codes are 40-BFH (TV set for North U.S.A.)CodeApplicableApplicable Conti-Function to remoteto TV set nuityco

25Custom codes are 40-BFH (TV set for North U.S.A.)Code Applicable Conti-Functionto TV set nutyD0HD1HD2H Do not use. Old type core power OND3HD4HD5HD6

26MODELSCN35F90CN35F95CX35F70TW56F80TW40F80TP61F90TP61F80TP55F80TP55F81TP50F90TP50F60TP50F61D7001010000011D6************D5000000000000D4001010111011D2

2710. ENTERING TO SERVICE MODE1. PROCEDURE(1) Press once MUTE key of remote hand unit to indicateMUTE on screen.(2) Press again MUTE key of remote han

2813. FAILURE DIAGNOSIS PROCEDUREModel of N5SS chassis is equipped with self diagnosis func-tion inside for trouble shooting.13-1. Contents to be Conf

2913-4. Understanding Self Diagnosis IndicationIn case that phenomenon always arises. See Fig. 3-7 .(Example of screen display)SELF CHECKPart coce of

SECTION V: WAC CIRCUIT ... 371. OUTLINE...

3013-4-1. Clearing method of self diagnosis resultIn the error count state of screen, press “CHANNEL DOWN”button on TV set pressing “DISPLAY” button o

3114. TROUBLESHOOTING CHART14-1. TV does Not Turned ONTV does not turned on.Relay soundCheck of voltage at pin 7 of QA01(DC 5V).8MHz oscillation wavef

3214-2. No Acception of KEY-IN14-3. No Picture (Snow Noise)NGOKNo pictureVoltage at pins of +5V, and 32V.Check H001. Check tuner power circuit.Key on

3314-5. No Indication On Screen14-4. Memory Circuit CheckNGNGOKOKOKNo indication on screen.Check of RESET at 5V.Check of CLK, CS, BUSY, DATA at pin 22

341. DVD SWITCH BLOCK DIAGRAM5352514561315CYYQIYQIDVD SWITCH UNITQW01 TC4053BPLHLHLHWAC UNITYQ (B - Y)I (R- Y)YQIYQIYCDUAL UNITSub V.Sub Y.Sub C.ZY01

352. OUTLINEIn this model, the DVD input terminals are provided in or-der to receive the color difference signals (Y, Cr, Cb) out-put from a DVD play

361. OUTLINEA wide aspect conversion (hereafter called WAC) process (3/4compression process in 4:3 mode and 1/2 compression processon left screen in d

37LPFAMPQX28QX29LX14 etcQX26QX27LX13 etcQX10QX15ISIQSIY WAI WAQ WAI THQ THY THYSIIBCQSOISOYSOHREVMORCKVDIVBLIBDQX13QX11QX06LX12 etc115117139VDP57NCS61

38• Pin FunctionFig. 5-2 Pin function of TC9097F (QFP 80 pin)251ISIVRA2YSINCVBCVRD2VBD4VDD3(DA2)QSONCVBD3VSS3(DA2)ISOVRD1NCVDD2(DA1)YSOVBD2VSS2(DA1)V

39Table 5-1 Names and functions of TC9097FI/OI–I–––––O–––O–––O–––––I––––I–II––III–NameISIVRA2YSINCVBCVBD2VBD4AVDDQSONCVBD3AGNDISOVRD1NCAVDDYSOVBD2AGN

SECTION X: DEFLECTION DISTORTION CORRECTION CIRCUIT (SIDE DPC CIRCUIT)...

40No.3839404142434445464748495051525354555657585960616263646566676869707172737475I/OI––I–––––O–––O–––O–––––I––––I–II––III–NameHDFGNDAVDDVFL2NCAGNDCKSE

41I/O––I––No.7677787980NameNCVBMQSIVBAAGNDFunction–Bias for MPX, clamp 2Q color signal inputBias for AD1, AD2Analog ground3. BLOCK DIAGRAM1/2MPX&C

424. WIDE ASPECT CONVERSION CIRCUIT FAILURE ANALYSISPROCEDURES4-1. Left Screen Picture Failure in Normal Mode/Double Window Modes(No Picture, Sync Dis

434-2. Raster Horizontal One4-2-1. Adjustment Method(1) Disconnect any video inputs(2) Open RX-40.(3) Connect frequency counter to QX19 emitter.(4) Ad

441. OUTLINEDUAL circuit performs the signal process, etc. on the subscreen and is composed of the followings as shown in Fig. 6-1.• Video/color/defle

453. SYSTEM COMPONENT DIAGRAM OF DUAL UNITFrom tunerSYSCVideo/color/deflectionprocess ICµPC1832GTR- YB- YR- YB- YYIQControl YIQOSDON-screendisplay su

464. CIRCUIT OPERATION4-1. Video/Color/Deflection Process SectionThe video/color/deflection section is shown in Fig. 6-2.The luminance signal is suppl

47Y13Y14SCLSDAY08PIP VIDEOY15PIP CL.P.FB.P.F4947SCL2SDA250SCLP48SDAP46BLK43B53COL54TIN51S.COL52CON62fsc SEL61PAL/NTSC23.5820 COLOR21 TINT37 SUB CO

484-2. Sub Screen Process SectionThe sub screen process section is shown in Fig. 6-3.The Y, I and Q signals from the video/color/deflection pro-cess s

494-3. Main/Sub Screen Superimposing SectionIn normal mode (with only the main screen picture displayed),the YS signal voltage always goes low and the

52. MERITS OF BUS SYSTEM2-1. Improved ServiceabilityMost of the adjustments previously made by resetting vari-able resistors and/or capacitors can be

505. TERMINAL FUNCTION, DESCRIPTION AND BLOCK DIAGRAM OFMAIN IC42Mode SWSeparate / Composite SW, ACC amp., Sub color control41 40 39 38 37 36 35 34 33

51123456789101112131415161718192021424140393837363534333231302928272625242322PAL/NTSC SWfsc SWH. sync det. filterSync sepa input Contrast controlSab

52Fig. 6-7 QY03 TC9092AF internal block diagramCLAMPMPXADADSub screenvideo inputFILTER FACTOR OPERATION/GENERATION (KGEN)HORIZONTALINTERPORATIONFILTE

53MRD1MRD2MRD3MRD4MRD5MRD6MRD7MRD8MRD9MRD10RMD11RMD12MRD13MRD14MRD15RERSTRCKRCKRIYSOUTVSSOSCMIOSCMOVDDFHMHFHMFVMVSSSCLSDASDAINOVSSPROMDIPROMCKPROMRESM

54No. Pin name I/O Pin function1 DAVSS D/A GND2 DABIAS3 D/A bias condenser connection terminal3 DABIAS2 D/A bias condenser connection terminal4 ADVDD

55No. Pin name I/O Pin function51 MRD1 I Data input terminal52 MRD2 I Data input terminal53 MRD3 I Data input terminal54 MRD4 I Data input terminal55

56Dout (X8) OE RE RSTR SRCKData - outbuffer (X8)Serial Read Controller512 Word serial read register (X8)Read line bufferLow-Half (X8)Read line bufferH

572-2. Circuit DescriptionFig. 7-1 shows a block diagram of the YCS circuit.(1) A video signal sent through the AV switching circuitpasses the input t

58• Terminal description (PZ01)No.DHDCDEDDDBDGDADFDIDJSignal nameComb throughY-Comb9VC-CombGNDV-AV5VfscSDA1SCL1VoltageComb through pulse for ED2 ID si

591. OUTLINEThe sync separation circuit, V pulse circuit, and blankingcircuit are provided inside Q501 (TA1222AN). The saw toothwave generation circui

6C-Chassis Model TW56F80 TW40F80 TP61F90 TP61F80 TP55F80 TP55F81 TP50F90 TP50F60 TP50F61 TP50F50 TP50F51CRT 7" 7" 7

602. V OUTPUT CIRCUIT2-1. Actual Circuit311514133687641523C322R329Q501C321R320Q302+9VD309+35VR301R330C319C314Q301C309C311R308 C308D301C313R303L3

612-3. V Output2-3-1. Circuit OperationThe V output circuit consists of a V driver circuit Q302,Pump-up circuit and output circuit Q301, and external

62(4) To decrease the collector loss of Q3, the power supplyvoltage is decreased during scanning period as shownin Fig. 8-7, and VCE1 decreases and th

632-4. V Linearity Characteristic Correction2-4-1. S-character Correction(Up-and Down-ward Extension Correction)A parabola component developed across

643-1. +35V Over Current Protection CircuitThe over current protection circuit cuts off the power supplyrelay when it detects abnormal current increas

654. RASTER POSITION SWITCHING CIRCUIT4-1. OutlineWhen the vertical screen position adjustment is carried outon the projection TV, DC current is direc

661. OUTLINEThe H deflection circuit works to deflect a beam from left toright by flowing a sawtooth waveform of 15.625 kHz/15.735kHz into the DY H de

67(4) To shorten the storage time and the falling time, a suf-ficiently high reverse bias voltage must be applied toallow a heavy reverse current to f

684. HORIZONTAL OUTPUT CIRCUITThe horizontal output circuit applies a 15.625 kHz/15.734kHz sawtooth wave current to the deflection coil with mu-tual a

69Description of the basic circuit1. t1~t2:A positive pulse is applied to base of the output transistorfrom the drive circuit, and a forward base curr

74. FRONT VIEWFig. 1-1Note: [No] Owner's manual page.POWERDEMOMENUANT/VIDEOENTERVOLUME CHANNELPOWER indicatorPOWER buttonPress to openthe door.B

70Amplitude CorrectionTo vary horizontal amplitude, it is necessary to vary asawtooth wave current flowing into the deflection coil. Theseare two meth

71(2) Left-right Asymmetrical Correction (LIN coil)In the circuit shown in Fig. 9-9 (a), the deflection coilcurrent iH does not flow straight as shown

724-2. White Peak Bending Correction Circuit4-2-1. OutlineWhite peak area in screen picture may sometimes cause bend-ing in picture. See figure below.

734-3. H Blanking4-3-1. OutlineThe H blanking circuit applies a blanking precisely for thehorizontal flyback period so that undesirable pictures fold-

744-4. 200V Low Voltage Protection4-4-1. OutlineWhen the video output power supply 200V is stopped bysome abnormality occurence, the current inside CP

755. HIGH VOLTAGE GENERATION CIRCUITFig. 9-15The high voltage generation circuit develops an anode volt-age for the picture tube, focus, screen, CRT h

765-1-1. +210VFor the flyback period, pulses are stacked up to DC +125Vwith FBT, and the voltage is rectified by D406 and filteredby C446.5-1-2. +35V,

776. HIGH VOLTAGE CIRCUIT6-1. High Voltage Regulator6-1-1. OutlineGenerally, four kinds of methods exist to stabilize a highvoltage in high voltage ou

786-1-3. ActualFig. 9-22 shows the actual circuit used in the unit.A resonant capacitor C0 is also split into two capacitors C443and C444 in this circ

79Then Q463 turns on. By this Tr6 and Tr6 turn on to makeON/OFF pulse at pin 7of QA01 in low level, Q846 and Q845turns off, then relay SR81 turns off.

85. REAR VIEWS-VIDEO VIDEOL/MCNO RAUDIOIN-VIDEO 3VIDEO / AUDIO INPUT jacks (VIDEO 3)S-VIDEO INPUT jack (VIDEO 3)Behind the doorTV frontFig. 1-2EXT S

808. OVER CURRENT PROTECTION CIRCUIT8-1. OutlineIf main power (125V) current increases abnormally due tocomponents failure, there is possible danger o

81(4) V picture position (neutral voltage setting)(5) V M-character correction(6) V EHT correction(7) H amplitude(8) L and R pin-cushion distortion co

82When the negative pulse developed at the point B is inte-grated with Lm and Csm, its average value appears at Csmas a negative voltage.By modulating

833. ACTUAL CIRCUITIn the actual circuit, the resonant capacitor is split into twoas shown in Fig. 10-7. One, C440, is inserted between thecollector o

843-1. Basic Operation and Current Path3-1-1. Later Half Scanning PeriodWhen the power is turned on, the power supply voltage VBis applied to CS and C

853-1-3. Later Half of Flyback PeriodAll energy in the coil has been transferred to the resonantcapacitors at the center of the flyback period, and th

861. OUTLINEThe digital convergence circuit develops outputs to correctscreen distortion and perform color matching. The digitalconvergence circuit u

87Fig. 11-1 Block diagramFilterFilterFilterFilterFilterFilterD/AD/AD/ARGBYsRAM (8∗8∗12bit)∗3Q715Q717Q719Q705Q704Q703GHGVBHBVRVRHCounterPLLHDVDQ707Q71

883. PICTURE ADJUSTMENTFour screens for Normal/Full, Theater wide 1, Theater Wide2, Theater Wide 3 are provided for the adjustments. Whenmaking the ad

893-2. Service Mode3-2-1. OutlineThe service mode, one of the functions this unit provides, iscontrolled by the microprocessor QA01 and .This mode is

96. REMOTE CONTROL VIEWADV/POP CHADV/POP CH23568947¥0ENTPIC -SIZETV/VIDEORECALLPOWERCHVOLCH RTNEDS MENUFAV FAVEXITRESETSTOP SCURCE PLAY POPRECTV/VCR

903-2-3. Initial screenThe screen mode is Normal/Full screen mode.Correction point: Vertical 8 * Horizontal 7 (® and - marksare the adjusting points.

913-2-4. Key function of remote control unitADV/POP CHADV/PCB CH23568947¥0ENTPIC SIZETV/VIDEORECALLPOWERCHVOLCH RTNEDS MENUFAV FAVEXITRESETSTOP SCURC

923-2-5. Operation procedure(1) Set the screen to Normal or Full mode using the PIC-SIZE key on the remote controller.(2) Set the unit to the service

933-3-2. Theater Wide1Fig. 11-70428.535120566.5428.535120566.5249213103.50115217.52497.5Screen center40 inches 16:9 Screen size: Horizontal 885mm x Ve

943-3-3. Theater Wide 2Fig. 11-9Fig. 11-1000298.9256.2128.1435217.5362.572.572.5217.5362.5435Screen center40 inches 16:9 Screen size: Horizontal 885mm

953-3-4. Theater Wide 3Fig. 11-1100269.5231115.5115.5231269.5435217.5362.572.572.5217.5362.5435Screen center40 inches 16:9 Screen size: Horizontal 885

964. CASE STUDYIn many cases, a color deviation will be corrected by return-ing the HIT and WID data for the main deflection side to theinitial values

975. TROUBLESHOOTING5-1. Adjusting Procedure in Replacing CRTCut offLens focusElectrical focusYoke horizontalUser convergence enter checkCenteringConv

986. CONVERGENCE OUTPUT CIRCUIT6-1. OutlineThis circuit current-amplifies digital convergence correctionsignal at output circuit, and drives by conver

996-3. Convergence Block DiagramFig. 11-14DIGITAL CONVERP708RVGVBVRHGHBH+9V-9V+5VHDVDRGBI2CSSCLVSDAUSCLMSDAM(REGULATER)Q754+5VQ755+9VQ756-9VQ764TC74HC