Manuals / Toshiba / TV and Video / Projection Television

Toshiba TW40F80 Contents, Section Ii Tuner, If/Mts/S. Pro Module, Microcomputer Terminal Function

Models: TW40F80

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Contents
SECTION I: OUTLINE	6
1. FEATURE	6
2. MERITS OF BUS SYSTEM	6
3. SPECIFICATIONS	7
4. FRONT VIEW	8
5. REAR VIEW	9
6. REMOTE CONTROL VIEW	10
7. CHASSIS LAYOUT	11
8. CONSTRUCTION OF CHASSIS	12
SECTION II: TUNER, IF/MTS/S. PRO MODULE	13
1. CIRCUIT BLOCK	13
2. POP TUNER	17
SECTION III: CHANNEL SELECTION CIRCUIT	18
1. OUTLINE OF CHANNEL SELECTION CIRCUIT SYSTEM	18
2. OPERATION OF CHANNEL SELECTION CIRCUIT	18
3. MICROCOMPUTER	19
4. MICROCOMPUTER TERMINAL FUNCTION	20
5. EEPROM (QA02)	22
6. ON SCREEN FUNCTION	22
7. SYSTEM BLOCK DIAGRAM	23
8. LOCAL KEY DETECTION METHOD	24
9. REMOTE CONTROL CODE ASSIGNMENT	25
10. ENTERING TO SERVICE MODE	28
11. TEST SIGNAL SELECTION	28
12. SERVICE ADJUSTMENT	28
13. FAILURE DIAGNOSIS PROCEDURE	29
14. TROUBLESHOOTING CHART	32
SECTION IV: DVD SWITCH CIRCUIT	35
1. DVD SWITCH BLOCK DIAGRAM	35
2. OUTLINE	36

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Contents

TECHNICAL TRAINING MANUAL N5SS CHASSIS TW40F80PROJECTION TELEVISION SECTION IV DVD SWITCH CIRCUIT Contents9. REMOTE CONTROL CODE ASSIGNMENT SECTION II TUNER, IF/MTS/S. PRO MODULE3. SYSTEM COMPONENT DIAGRAM OF DUAL UNIT 5. TERMINAL FUNCTION, DESCRIPTION AND BLOCK DIAGRAM OF4. WIDE ASPECT CONVERSION CIRCUIT FAILURE ANALYSIS SECTION VII 3-DIMENSION Y/C SEPARATOR CIRCUIT1. DEFLECTION DISTORTION CORRECTION IC TA8859CP SECTION X DEFLECTION DISTORTION CORRECTION CIRCUIT7. CONVERGENCE TROUBLESHOOTING CHART SECTION XI DIGITAL CONVERGENCE CIRCUIT2-1. Improved Serviceability SECTION 1. FEATUREOUTLINE 2. MERITS OF BUS SYSTEM 2-2. Reduction of Parts CountModel 3. SPECIFICATIONSC-Chassis TW56F80 TW40F804. FRONT VIEW Note No Owners manual page5. REAR VIEW IN-VIDEO6. REMOTE CONTROL VIEW TOSHIBA7. CHASSIS LAYOUT 6 DUALBRT TBS 8. CONSTRUCTION OF CHASSISA517 Fig. 2-1 Block diagram SECTION II TUNER, IF/MTS/S. PRO MODULE 1. CIRCUIT BLOCK1-2. Major Features 1-1. Outline1-3. Audio Multiplex Demodulation Circuit Fig. 2-2 Block diagram of MVUS34SSwitching Table 2-1 Matrix for broadcasting conditions and reception modeFig. 2-3 A.PRO block diagram 1-4. A.PRO Section Audio ProcessorVIDEO Configuration of the audio circuit and signal flow are given in FigMOTHER FRONT INPUTTerminal No 2. POP TUNER2-1. Outline Name2. OPERATION OF CHANNEL SELECTION CIRCUIT SECTION III CHANNEL SELECTION CIRCUIT1. OUTLINE OF CHANNEL SELECTION CIRCUIT SYSTEM 3. MICROCOMPUTER 4. MICROCOMPUTER TERMINAL FUNCTION Function MICROCOMPUTER TERMINAL NAME AND OPERATION LOGICTerminal Name In/Out5. EEPROM QA02 6. ON SCREEN FUNCTION7. SYSTEM BLOCK DIAGRAM Function 8. LOCAL KEY DETECTION METHODFig. 3-6 Local key assignment Table 3-1 Local key assignment FunctionFunction 9. REMOTE CONTROL CODE ASSIGNMENTCode to TV setFunction Custom codes are 40-BFH TV set for North U.S.ACode Custom codes are 40-BFH TV set for North U.S.AOPT1 9-1. Optional Setting for Each ModelOPT0 MODELS12. SERVICE ADJUSTMENT 10. ENTERING TO SERVICE MODE11. TEST SIGNAL SELECTION 13-3-1. Procedure 13. FAILURE DIAGNOSIS PROCEDURE13-1. Contents to be Confirmed by Customer Contents of self diagnosisExample of screen display Contents13-4. Understanding Self Diagnosis Indication SELF CHECKVIDEO INPUT 1 terminal should be open 13-4-2. Method utilizing inner signal13-4-1. Clearing method of self diagnosis result 14. TROUBLESHOOTING CHART 14-1. TV does Not Turned ONNG Check key-in circuit NG Check tuner power circuit Key on TV Voltage change at pins 17, 18 of QA01 5V to OK Replace QA01When remote unit key is pressed OK Replace QA01 No picture NG Voltage at pins of +5V, and OK14-4. Memory Circuit Check 14-5. No Indication On ScreenSECTION IV DVD SWITCH CIRCUIT 1. DVD SWITCH BLOCK DIAGRAM RV27 10k 2. OUTLINEOpen at Cb input Cb to DVD SW unit Cb input RV28 100k QV01 TA1218N2-1. Configuration SECTION V WAC CIRCUIT 1. OUTLINE2. CIRCUIT OPERATION 2-2-1. Signal FlowFig. 5-1 Wide aspect conversion unit block diagram PB6348 VDD5VCO2 Pin FunctionFig. 5-2 Pin function of TC9097F QFP 80 pin Function Table 5-1 Names and functions of TC9097FName Name FunctionName 3. BLOCK DIAGRAMFig. 5-3 TC9097F system block diagram Function4. WIDE ASPECT CONVERSION CIRCUIT FAILURE ANALYSIS PROCEDURES 4-2-1. Adjustment Method 4-2. Raster Horizontal One2. PRINCIPLES OF OPERATION SECTION VI DUAL CIRCUIT1. OUTLINE 9-screen multi-search process3. SYSTEM COMPONENT DIAGRAM OF DUAL UNIT 4. CIRCUIT OPERATION 4-1. Video/Color/Deflection Process SectionSignalreception 4-2. Sub Screen Process Section Fig. 6-3 Sub screen process section4-3. Main/Sub Screen Superimposing Section Fig. 6-4 Main/Sub screen superimposing sectiondiagram MAIN IC5. TERMINAL FUNCTION, DESCRIPTION AND BLOCK DIAGRAM OF QY01Blanking pulse output Power supply videoFig. 6-6 QY01 mPC1832GT pin layout PROGRAMDATA Fig. 6-7 QY03 TC9092AF internal block diagramMULTIPLEX MEMORYFig. 6-8 QY03 TC9092AF pin layout ADVREFYPin function Table 6-1 QY03 TC9092AF pin list NoPin name Pin function Table 6-2 QY03 TC9092AF pin list NoPin name Fig. 6-10 QY10/QY11 M518221-30ZS pin layout Fig. 6-9 QY10/QY11 M518221-30ZS internal block diagramPower supply +5V Terminal name2-1. Configuration SECTION VII 3-DIMENSION Y/C SEPARATOR CIRCUIT2. CIRCUIT DESCRIPTION 1. OUTLINETerminal description PZ01 Fig. 7-1 3-dimension Y/C separator unit block diagramSignal name VoltageSECTION VIII VERTICAL OUTPUT CIRCUIT 1. OUTLINE 1-1. Theory of Operation2-2. Sawtooth Waveform Generation 2. V OUTPUT CIRCUIT2-1. Actual Circuit 2-2-1. Circuit Operation2-3. V Output 2-3-1. Circuit OperationFig. 8-7 Output stage power supply voltage 2-4-1. S-character Correction Up-and Down-ward Extension Correction 3. PROTECTION CIRCUIT FOR V DEFLECTION STOP2-4. V Linearity Characteristic Correction 2-4-2. Up-and Down-ward Linearity Balance3-1. +35V Over Current Protection Circuit 3-1-1. Theory of Operation4-2. Operation 4. RASTER POSITION SWITCHING CIRCUIT4-1. Outline 3. BASIC OPERATION OF HORIZONTAL DRIVE SECTION IX HORIZONTAL DEFLECTION CIRCUIT2. HORIZONTAL DRIVE CIRCUIT Fig. 9-1 H drive circuit block diagramOFF period + ibOn period current4-1-1. Operation of Basic Circuit 4. HORIZONTAL OUTPUT CIRCUIT4-1. Theory of Operation 3. t2~t3 Description of the basic circuit 1. t1~t22. t2 4. t3~t41 S-curve Correction S Capacitor Amplitude Correction4-1-2. Linearity Correction LIN 2 Left-right Asymmetrical Correction LIN coil Fig. 9-9 Linearity coil4-2-2. Operation Theory 4-2. White Peak Bending Correction Circuit4-2-1. Outline Fig. 9-11 White peak bending correction circuit4-3-2. Theory of Operation 4-3. H Blanking4-3-1. Outline 4-3-3. Circuit Operation4-4-2. Theory of Operation 4-4. 200V Low Voltage Protection4-4-1. Outline 5. HIGH VOLTAGE GENERATION CIRCUIT 5-1. Theory of Operation5-1-3 5-1-1. +210V5-1-2. +35V 5-1-4. High Voltage6-1-1. Outline 6. HIGH VOLTAGE CIRCUIT6-1. High Voltage Regulator Fig. 9-19 Basic circuit for high voltage regulator6-1-3. Actual Fig. 9-22 Actual high voltage regulator circuit7-2. Operation 7. X-RAY PROTECTION CIRCUIT7-1. Outline Fig. 9-23 X-RAY protection circuit8-2. Operation 8. OVER CURRENT PROTECTION CIRCUIT8-1. Outline Fig. 9-24 Over current protection circuit1-2. Functions and Features SECTION X DEFLECTION DISTORTION CORRECTION CIRCUIT SIDE DPC CIRCUIT1. DEFLECTION DISTORTION CORRECTION IC TA8859CP Block Diagram2. DIODE MODULATOR CIRCUIT 3. ACTUAL CIRCUIT 3-1-2. First Half Scanning Period 3-1. Basic Operation and Current Path3-1-1. Later Half Scanning Period 3-1-3. Later Half of Flyback Period 3-1-4. First Half of Scanning Period1. OUTLINE SECTION XI DIGITAL CONVERGENCE CIRCUIT2-1. Configuration 2. CIRCUIT DESCRIPTIONFig. 11-1 Block diagram ∗∗∗812bit83. PICTURE ADJUSTMENT 3-2-2. Entering/Exiting Mode 3-2. Service Mode3-2-1. Outline 2 Second screen 3-2-3. Initial screen1 First screen 3-2-4. Key function of remote control unit TOSHIBA3-3-1. Normal/Full 3-2-5. Operation procedure3-3. Each Screen Adjustment Method 3-3-2. Theater Wide1 3-3-3. Theater Wide 3-3-4. Theater Wide 4-2. When Convergence Unit is Replaced 4. CASE STUDY4-1. When CRT is Replaced 5-2. Adjusting Procedure in Replacing Convergence Unit/Main Def 5. TROUBLESHOOTING5-1. Adjusting Procedure in Replacing CRT 4 To adjust from outside of digital convergence 6. CONVERGENCE OUTPUT CIRCUIT6-2-1. Signal flow 6-1. Outline6-3. Convergence Block Diagram 7. CONVERGENCE TROUBLESHOOTING CHART VerticalVOLTAGEREG WIDEF BP DV DH

Contents

SECTION II: TUNER, IF/MTS/S. PRO MODULE

SECTION III: CHANNEL SELECTION CIRCUIT

1. OUTLINE OF CHANNEL SELECTION CIRCUIT SYSTEM

2. OPERATION OF CHANNEL SELECTION CIRCUIT

4. MICROCOMPUTER TERMINAL FUNCTION

9. REMOTE CONTROL CODE ASSIGNMENT

SECTION IV: DVD SWITCH CIRCUIT