Toshiba TW40F80 manual Entering to Service Mode, Test Signal Selection, Service Adjustment

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10. ENTERING TO SERVICE MODE

1. PROCEDURE

(1)Press once MUTE key of remote hand unit to indicate MUTE on screen.

(2)Press again MUTE key of remote hand unit to keep pressing until the next procedure.

(3)In the status of above (2), wait for disappearing of in- dication on screen.

(4)In the status of above (3), press MENU (Channel set- ting) key on TV set.

2.Service mode is not memorized as the last-memory.

3.During service mode, indication S is displayed at upper right corner on screen.

11.TEST SIGNAL SELECTION

1.In OFF state of test signal, SGA terminal (Pin 20) and SGV terminal (Pin 21) are kept “L” condition.

2.The function of VIDEO test signal selection is cyclically changed with VIDEO key (remote unit).

	Table 3-2

Test Signal No.	Name of Pattern

0	Signal OFF

1	All black signal + R single color (OSD)

2	All black signal + G single color (OSD)

3	All black signal + B single color (OSD)

4	All black signal

5	All white signal

6	W/B

7	Black cross bar

8	White cross bar

9	Black cross hatch

10	White cross hatch

11	White cross dot

12	Black cross dot

13	H signal (bright area)

14	H signal (dark area)

15	Black cross + G signal color

(3)SGA (audio test signal) output should be square wave of 1 kHz.

12. SERVICE ADJUSTMENT

1.ADJUSTMENT MENU INDICATION ON/OFF : MENU key (on TV set)

2.During display of adjustment menu, the followings are effective.

a)Selection of adjustment item :

	POS UP/DN key (on TV/remote unit)
b)	Adjustment of each item :
	VOL UP/ DN key (on TV / remote unit)
c) Direct selection of adjustment item
	R CUTOFF		: 1 POS (remote unit)
	G CUTOFF		: 2 POS (remote unit)
	B CUTOFF		: 3 POS (remote unit)
d)	Data setting for PC unit adjustment
	SUB CONTRAST		: 4 POS (remote unit)
	SUB COLOR	:	5 POS (remote unit)
	SUB TINT		: 6 POS (remote unit)
e)	Horizontal line ON/OFF		: VIDEO (on TV set)
f)	Test signal selection	:	VIDEO (remote unit)

*In service mode, serviceable items are limited.

3.Test audio signal ON / OFF : 8 POS (remote unit)

*Test audio signal : 1 kHz

4. Self check display

: 9 POS (remote unit)

*Cyclic display (including ON/OFF)

5.Initialization of memory :

CALL (remote unit) + POS UP (on TV set)

6. Initialization of self check data :

CALL (remote unit) + POS DN (on TV set)

7. BUS OFF :

CALL (remote unit) + VOL UP (on TV set)

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Contents TW40F80 Contents Wide Aspect Conversion Circuit Failure Analysis Terminal FUNCTION, Description and Block DiagramSection XI Digital Convergence Circuit Section X Deflection Distortion Correction CircuitReduction of Parts Count Section FeatureImproved Serviceability Outline Merits of BUS SystemChassis Model SpecificationsVideo 3 Inputs Front ViewIN-VIDEO Rear View100 Remote Control ViewStarsight Newosd FRO. Surr Chassis LayoutConstruction of Chassis RF AGC Major FeaturesSection II TUNER, IF/MTS/S. PRO Module Circuit Block OutlineAudio Multiplex Demodulation Circuit A.PRO Section Audio Processor A.PRO block diagramConfiguration of the audio circuit and signal flow are given Terminal No Name POP TunerOperation of Channel Selection Circuit SDA SCL MicrocomputerMicrocomputer Terminal Function Terminal Name Function In/Out Logic Remarks Microcomputer Terminal Name and Operation LogicOn Screen Function EEPROMQA02SDA System Block Diagram Local key assignment Function Local KEY Detection MethodRemote 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 ModelEntering to Service Mode Test Signal SelectionService Adjustment Failure Diagnosis Procedure Contents to be Confirmed by CustomerExecuting Self Diagnosis Function Self Check Understanding Self Diagnosis IndicationClearing method of self diagnosis result Troubleshooting Chart TV does Not Turned onYES No Picture Snow Noise No Acception of KEY-INNo Indication On Screen Memory Circuit CheckSection IV DVD Switch Circuit DVD Switch Block Diagram Outline Operation ConfigurationSection V WAC Circuit Outline Circuit OperationWide aspect conversion unit block diagram PB6348 Pin function of TC9097F QFP 80 pin Pin FunctionName Function Names and functions of TC9097FVFL2 TC9097F system block diagram Block DiagramE2PROM OK? Wide Aspect Conversion Circuit Failure Analysis ProceduresRaster Horizontal One Adjustment MethodSection 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 SectionMain/Sub screen superimposing section Main/Sub Screen Superimposing SectionMPC1832GT Main IC Terminal FUNCTION, Description and Block DiagramDiagram QY01QY01 mPC1832GT pin layout QY03 TC9092AF internal block diagram QY03 TC9092AF pin layout CKW QY03 TC9092AF pin list No Pin name Pin functionMRD1 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 OutlineCircuit Operation Output CircuitActual Circuit Sawtooth Waveform GenerationOutput 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 CorrectionUZ11BSB +35V Over Current Protection CircuitTheory of Operation UZ22BSDKetsu Raster Position Switching CircuitBasic Operation of Horizontal Drive SignalSection IX Horizontal Deflection Circuit Outline Horizontal Drive CircuitOn period OFF period FBT Signal DEF/POWER PCBHorizontal Output Circuit Operation of Basic CircuitT4~t6 Description of the basic circuit T1~t2T2~t3 T3~t4Amplitude Correction Linearity Correction LINCurve Correction S Capacitor Linearity coil Left-right Asymmetrical Correction LIN coilEHT White Peak Bending Correction CircuitOutline Operation TheoryBlanking Gate Protector Low Voltage ProtectionHigh Voltage DPC Circuit Regulator High Voltage Generation CircuitAFC ABL1. +210V 2. +35VHigh Voltage High Voltage Circuit CR-BLOCKAnode Actual FBT CR-BLOCK E HED’ 23 X-RAY protection circuit RAY Protection CircuitOver Current Protection Circuit Block Diagram Functions and FeaturesOUT Diode Modulator CircuitActual 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 PromPicture Adjustment Entering/Exiting Mode Service ModeInitial screen First screen Second screenSfull ENT Key function of remote control unitOperation 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