Contents | Toshiba TW40F80 specification

Contents Page 1
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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Toshiba TW40F80 manual Contents

Contents

TW40F80 Contents Terminal FUNCTION, Description and Block Diagram Wide Aspect Conversion Circuit Failure Analysis Section X Deflection Distortion Correction Circuit Section XI Digital Convergence Circuit Outline Merits of BUS System Section FeatureImproved Serviceability Reduction of Parts Count Specifications Chassis Model Front View Video 3 Inputs Rear View IN-VIDEO Remote Control View 100 Chassis Layout Starsight Newosd FRO. Surr Construction of Chassis Outline Major FeaturesSection II TUNER, IF/MTS/S. PRO Module Circuit Block RF AGC Audio Multiplex Demodulation Circuit A.PRO block diagram A.PRO Section Audio Processor Configuration of the audio circuit and signal flow are given POP Tuner Terminal No Name Operation of Channel Selection Circuit Microcomputer SDA SCL Microcomputer Terminal Function Microcomputer Terminal Name and Operation Logic Terminal Name Function In/Out Logic Remarks SDA On Screen FunctionEEPROMQA02 System Block Diagram Local KEY Detection Method Local key assignment Function To TV set Remote Control Code AssignmentCode Function Custom codes are 40-BFH TV set for North U.S.A Code Function Optional Setting for Each Model OPT0 OPT1 Models HEX Service Adjustment Entering to Service ModeTest Signal Selection Executing Self Diagnosis Function Failure Diagnosis ProcedureContents to be Confirmed by Customer Understanding Self Diagnosis Indication Self Check Clearing method of self diagnosis result YES Troubleshooting ChartTV does Not Turned on No Acception of KEY-IN No Picture Snow Noise Memory Circuit Check No Indication On Screen Section IV DVD Switch Circuit DVD Switch Block Diagram Outline Circuit Operation ConfigurationSection V WAC Circuit Outline Operation Wide aspect conversion unit block diagram PB6348 Pin Function Pin function of TC9097F QFP 80 pin Names and functions of TC9097F Name Function VFL2 Block Diagram TC9097F system block diagram Wide Aspect Conversion Circuit Failure Analysis Procedures E2PROM OK? Adjustment Method Raster Horizontal One Screen multi-search process Section VI Dual Circuit OutlinePrinciples of Operation 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 QY01 Main IC Terminal FUNCTION, Description and Block DiagramDiagram MPC1832GT QY01 mPC1832GT pin layout QY03 TC9092AF internal block diagram QY03 TC9092AF pin layout QY03 TC9092AF pin list No Pin name Pin function CKW MRD1 QY10/QY11 M518221-30ZS internal block diagram Circuit Description Section VII 3-DIMENSION Y/C Separator Circuit OutlineConfiguration Circuit Description Terminal description PZ01 Section Viii Vertical Output Circuit Outline Theory of Operation Sawtooth Waveform Generation Output CircuitActual Circuit Circuit Operation Output Output stage power supply voltage Character Correction Up-and Down-ward Extension Correction Linearity Characteristic CorrectionProtection Circuit for V Deflection Stop Up-and Down-ward Linearity Balance UZ22BSD +35V Over Current Protection CircuitTheory of Operation UZ11BSB Raster Position Switching Circuit Ketsu Horizontal Drive Circuit SignalSection IX Horizontal Deflection Circuit Outline Basic Operation of Horizontal Drive On period OFF period Operation of Basic Circuit Signal DEF/POWER PCBHorizontal Output Circuit FBT T3~t4 Description of the basic circuit T1~t2T2~t3 T4~t6 Curve Correction S Capacitor Amplitude CorrectionLinearity Correction LIN Left-right Asymmetrical Correction LIN coil Linearity coil Operation Theory White Peak Bending Correction CircuitOutline EHT Blanking Low Voltage Protection Gate Protector ABL High Voltage Generation CircuitAFC High Voltage DPC Circuit Regulator High Voltage 1. +210V2. +35V Anode High Voltage CircuitCR-BLOCK ED’ ActualFBT CR-BLOCK E H RAY Protection Circuit 23 X-RAY protection circuit Over Current Protection Circuit Functions and Features Block Diagram Diode Modulator Circuit OUT Actual Circuit First Half Scanning Period Basic Operation and Current PathLater Half Scanning Period P.T Later Half of Flyback PeriodFirst Half of Scanning Period Section XI Digital Convergence Circuit Outline Prom ResetMemory PLL Picture Adjustment Service Mode Entering/Exiting Mode Sfull Initial screenFirst screen Second screen Key function of remote control unit ENT Normal/Full Operation procedureEach Screen Adjustment Method Theater Wide1 Theater Wide 269.5 Case Study When CRT is ReplacedWhen Convergence Unit is Replaced Adjusting Procedure in Replacing Convergence Unit/Main Def TroubleshootingAdjusting Procedure in Replacing CRT Convergence Output Circuit Convergence Block Diagram Convergence Troubleshooting Chart Main Unit