Wide Aspect Conversion Circuit Failure Analysis | Toshiba TW40F80

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SECTION V: WAC CIRCUIT	37
1. OUTLINE	37
2. CIRCUIT OPERATION	37
3. BLOCK DIAGRAM	42
4. WIDE ASPECT CONVERSION CIRCUIT FAILURE ANALYSIS
PROCEDURES	43
SECTION VI: DUAL CIRCUIT	45
1. OUTLINE	45
2. PRINCIPLES OF OPERATION	45
3. SYSTEM COMPONENT DIAGRAM OF DUAL UNIT	46
4. CIRCUIT OPERATION	47
5. TERMINAL FUNCTION, DESCRIPTION AND BLOCK DIAGRAM OF
MAIN IC	51
SECTION VII: 3-DIMENSION Y/C SEPARATOR CIRCUIT	58
1. OUTLINE	58
2. CIRCUIT DESCRIPTION	58
SECTION VIII: VERTICAL OUTPUT CIRCUIT	60
1. OUTLINE	60
2. V OUTPUT CIRCUIT	61
3. PROTECTION CIRCUIT FOR V DEFLECTION STOP	64
4. RASTER POSITION SWITCHING CIRCUIT	66
SECTION IX: HORIZONTAL DEFLECTION CIRCUIT	67
1. OUTLINE	67
2. HORIZONTAL DRIVE CIRCUIT	67
3. BASIC OPERATION OF HORIZONTAL DRIVE	67
4. HORIZONTAL OUTPUT CIRCUIT	69
5. HIGH VOLTAGE GENERATION CIRCUIT	76
6. HIGH VOLTAGE CIRCUIT	78
7. X-RAY PROTECTION CIRCUIT	80
8. OVER CURRENT PROTECTION CIRCUIT	81

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Toshiba TW40F80 manual Wide Aspect Conversion Circuit Failure Analysis, Terminal FUNCTION, Description and Block Diagram

Contents

TW40F80 Contents Wide Aspect Conversion Circuit Failure Analysis Terminal FUNCTION, Description and Block Diagram Section XI Digital Convergence Circuit Section X Deflection Distortion Correction Circuit Reduction of Parts Count Section FeatureImproved Serviceability Outline Merits of BUS System Chassis Model Specifications Video 3 Inputs Front View IN-VIDEO Rear View 100 Remote Control View Starsight Newosd FRO. Surr Chassis Layout Construction of Chassis RF AGC Major FeaturesSection II TUNER, IF/MTS/S. PRO Module Circuit Block Outline Audio Multiplex Demodulation Circuit A.PRO Section Audio Processor A.PRO block diagram Configuration of the audio circuit and signal flow are given Terminal No Name POP Tuner Operation of Channel Selection Circuit SDA SCL Microcomputer Microcomputer Terminal Function Terminal Name Function In/Out Logic Remarks Microcomputer Terminal Name and Operation Logic On Screen Function EEPROMQA02SDA System Block Diagram Local key assignment Function Local KEY Detection Method Remote Control Code Assignment Code FunctionTo TV set Custom codes are 40-BFH TV set for North U.S.A Code Function OPT0 OPT1 Models HEX Optional Setting for Each Model Entering to Service Mode Test Signal SelectionService Adjustment Failure Diagnosis Procedure Contents to be Confirmed by CustomerExecuting Self Diagnosis Function Self Check Understanding Self Diagnosis Indication Clearing method of self diagnosis result Troubleshooting Chart TV does Not Turned onYES No Picture Snow Noise No Acception of KEY-IN No Indication On Screen Memory Circuit Check Section IV DVD Switch Circuit DVD Switch Block Diagram Outline Operation ConfigurationSection V WAC Circuit Outline Circuit Operation Wide aspect conversion unit block diagram PB6348 Pin function of TC9097F QFP 80 pin Pin Function Name Function Names and functions of TC9097F VFL2 TC9097F system block diagram Block Diagram E2PROM OK? Wide Aspect Conversion Circuit Failure Analysis Procedures Raster Horizontal One Adjustment Method Section VI Dual Circuit Outline Principles of OperationScreen multi-search process System Component Diagram of Dual Unit Video/Color/Deflection Process Section OSD Sub screen process section Sub Screen Process Section Main/Sub screen superimposing section Main/Sub Screen Superimposing Section MPC1832GT Main IC Terminal FUNCTION, Description and Block DiagramDiagram QY01 QY01 mPC1832GT pin layout QY03 TC9092AF internal block diagram QY03 TC9092AF pin layout CKW QY03 TC9092AF pin list No Pin name Pin function MRD1 QY10/QY11 M518221-30ZS internal block diagram Section VII 3-DIMENSION Y/C Separator Circuit Outline Configuration Circuit DescriptionCircuit Description Terminal description PZ01 Theory of Operation Section Viii Vertical Output Circuit Outline Circuit Operation Output CircuitActual Circuit Sawtooth Waveform Generation Output Output stage power supply voltage Up-and Down-ward Linearity Balance Linearity Characteristic CorrectionProtection Circuit for V Deflection Stop Character Correction Up-and Down-ward Extension Correction UZ11BSB +35V Over Current Protection CircuitTheory of Operation UZ22BSD Ketsu Raster Position Switching Circuit Basic Operation of Horizontal Drive SignalSection IX Horizontal Deflection Circuit Outline Horizontal Drive Circuit On period OFF period FBT Signal DEF/POWER PCBHorizontal Output Circuit Operation of Basic Circuit T4~t6 Description of the basic circuit T1~t2T2~t3 T3~t4 Amplitude Correction Linearity Correction LINCurve Correction S Capacitor Linearity coil Left-right Asymmetrical Correction LIN coil EHT White Peak Bending Correction CircuitOutline Operation Theory Blanking Gate Protector Low Voltage Protection High Voltage DPC Circuit Regulator High Voltage Generation CircuitAFC ABL 1. +210V 2. +35VHigh Voltage High Voltage Circuit CR-BLOCKAnode Actual FBT CR-BLOCK E HED’ 23 X-RAY protection circuit RAY Protection Circuit Over Current Protection Circuit Block Diagram Functions and Features OUT Diode Modulator Circuit Actual Circuit Basic Operation and Current Path Later Half Scanning PeriodFirst Half Scanning Period Later Half of Flyback Period First Half of Scanning PeriodP.T Section XI Digital Convergence Circuit Outline PLL ResetMemory Prom Picture Adjustment Entering/Exiting Mode Service Mode Initial screen First screen Second screenSfull ENT Key function of remote control unit Operation procedure Each Screen Adjustment MethodNormal/Full Theater Wide1 Theater Wide 269.5 When CRT is Replaced When Convergence Unit is ReplacedCase Study Troubleshooting Adjusting Procedure in Replacing CRTAdjusting Procedure in Replacing Convergence Unit/Main Def Convergence Output Circuit Convergence Block Diagram Convergence Troubleshooting Chart Main Unit