Toshiba 50A50 55A60, 50A60 Servicing Precautions, Adjusting Procedure in Replacing CRT

Page 5

TO REMOVE CRT (Same procedure for R, G, B)

1.Remove CRT DRIVE Board, S. V. M. COIL and DEF. YOKE from CRT.

2.Remove Lens Assembly.

3.Detach CRT Anode Cap from CRT.

4.Remove CRT Assembly from CRT Mounting.

CRT REPLACEMENT (Same procedure for R, G, B) Reverse the removal procedures except the followings.

1.Anode Cable should be replaced with new one. See “SERVICING PRECAUTIONS” shown below.

2.Install silicon (T461B) to the CRT, replace the Anode cable and put enough silicon again on around the An- ode Cap as illustrated.

CAUTION: Align the Anode cable as illustrated on page 4.

ADJUSTING PROCEDURE IN REPLACING CRT

1.R.G.B. FOCUS ADJUSTMENT (page 6.)

2.PICTURE TILT ADJUSTMENT (page 6.)

3.USER CONVERGENCE CENTER CHECK (See owner's manual.)

4.CENTERING ADJUSTMENT (page 6.)

5.CONVERGENCE ADJUSTMENT (page 13.)

6.WHITE BALANCE ADJUSTMENT (page 12.) Adjustments are complete.

Anode Cap

Silicon

(On shaded area) TSE3843W #23960136

2 ~ 5 mm

15 ~ 25 mm

SPECIFIC INFORMATIONS GENERAL ADJUSTMENTS

SERVICING PRECAUTIONS

Do not use a magnetized screw driver for screws of Deflection Yoke and Velocity Modulation Coil to avoid magnetization of electron gun.

Magnetization of electron gun will degrade basic function and result in unbalance of right and left shift of user static convergence, and result in no variable quantity.

When replacing the anode cap assembly (CRT) or anode lead assembly (F.B.T.), remove the anode lead holder from old one and attach the holder again to new anode lead.

Check the point of anode lead in a straight line, if it is winding, please revise it.

Screw for

D.Y

Screw for SVM coil

Anode lead holder

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Contents 50A60, 50A50 Table of Contents RAY Radiation Precaution General Adjustments Safety InstructionsSafety Precaution Product Safety NoticeLeakage will Occur CRT Assembly Replacement and MountingAdjusting Procedure in Replacing CRT Servicing PrecautionsB Focus Adjustment Picture Tube Components AdjustmentTilt Adjustment Centering AdjustmentScreen VR Focus VR Location of Screen and Focus VR’SReplacement of High Voltage Cable Replacement of the CRTEntering to Service Mode Service ModeDisplaying the Adjustment Menu KEY Function in the Service ModeAdjusting the Data Selecting the Adjusting ItemsExit from Service Mode Self Diagnostic FunctionAdjustment Procedure Electrical AdjustmentHIT HeightWidth WIDKEY Function Convergence Adjustment Convergence AdjustmentCentering Adjustment Picture Position AdjustmentReplacing Convergence Unit CRT ReplacementHOW to Clean Screen HOW to Clean Lens and MirrorScreen and Mirror Alignments Assembling Front ScreenHigh Voltage Check Circuit ChecksAnode Voltage Measuring Method FS Circuit CheckSafety Instructions Specific Informations Setting & Adjusting DataService Mode Adjusting Items and Data in the Service Mode Circuit ChecksTV/VIDEO Power Volume T S Exit Demo MenuRecall Power Timer TV/VIDEO ResetLight MuteTV/CABLE function Programming Channel MemoryCircuit Block Diagram Mechanical Disassembly OMF Chassis Replacement Parts ListCapacitors Specific Informations General Adjustments Specific Informations General Adjustments Specific Informations General Adjustments Resistors Specific Informations General Adjustments Specific Informations General Adjustments Specific Informations General Adjustments Specific Informations General Adjustments Specific Informations General Adjustments Coils & Transformers TFB3086AD SemiconductorsIC, MC14053BFEL Miscellaneous Tuner PC Board AssembliesPicture Tube Cabinet Parts AccessoriesBottom Foil Side SIGNAL/CON Board PB9450DEF/POWER Board PB9451 BACK/AV Board PB9452 DIGI-COMB Board PB9398 DIGI-CONV Board PB9453Drive Board PB9454-3 Drive Board PB9454-1Drive Board PB9454-2 REM Board PB9454-10 FRONT-CONV Board PB9454-5FRONT-IN Board PB9454-9 SVM Board PB9454-6 FRONT-CON Board PB9454-8 Terminal View of Transistors Memo Specifications Representative 50A60 Toshiba Corporation