Sony KV-21FX30E, KV-21FX30B service manual SET-UP Adjustments

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SECTION 3 SET-UP ADJUSTMENTS

•When complete readjustment is necessary or a new picture tube is installed, carry out the following adjustments.

•Unless there are specific instructions to the contrary, carry out these adjustments with the rated power supply.

•Unless there are specific instructions to the contrary, set the controls and switches to the following settings :

Contrast

80% [or remote control ormal]

Brightness

50%

Carry out the adjustments in the following order :

3-1. Beam Landing.

3-2. Convergence.

3-3. Focus.

3-4. White Balance.

Note : Test equipment required.

1.Color bar/pattern generator.

2.Degausser.

3.Oscilloscope.

4.Digital multimeter.

Preparation:

Fig. 3-2.

Purity

1.In order to reduce the influence of geomagnetism on the set’s picture tube, face it in an easterly or westerly direction.

2.Switch on the set’s power and degauss with the degausser.

3-1. Beam Landing

1.Input an all white signal from the pattern generator. Set the Contrast and Brightness to normal.

2.Set the pattern generator raster signal to Red.

3. Move the deflection yoke forward and adjust with the

Fig. 3-3.

purity control so that the Red is at the centre and the Blue

 

and Green take up equally sized areas on each side of the

 

screen. [See Fig.3-1 - 3-3].

 

4.Move the deflection yoke backwards and adjust so that the entire screen becomes Red. [See Fig.3-1]

5.Switch the raster signal to Blue, then to Green and verify the condition.

6.When the position of the deflection yoke has been determined, fasten the deflection yoke with the screws.

7.If the beam does not land correctly in all the corners, use a magnet to correct it. [See Fig.3-4]

Fig. 3-1.

Caution :

High voltages are present on the Deflection yoke terminals

-take care when handling the Deflection yoke whilst carrying out adjustments.

GREEN

RED

BLUE

Fig.3-4

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Contents FE-2CHASSIS Table of Contents Item Model Front Connection Panel Pin connector Rear Connection PanelHow to enter into Table Flash Timing Example e.g. error numberGeneral Introducing and Using the Menu System Sleep Timer Level Level 3 / Function Teletext Specifications Troubleshooting Speaker Box Removal Speaker Connector DisconnectionSpeaker Box Disassembly Rear Cover RemovalService Position Wire DressingBoard PWB Removal Step How to handle the Anode-Cap Picture Tube RemovalRemoval of the Anode-Cap SET-UP Adjustments Preparation Horizontal and Vertical Static ConvergenceOperation of the BMC Hexapole magnet TLV Adjustment Geometry Adjustment PreparationHtil Adjustment YCH AdjustmentFocus Screen G2 adjustmentWhite balance adjustment for TV mode Layout of each controlHow to enter into the Service Mode Sub Brightness AdjustmentSub Contrast Adjustment Print side of a board Sub Colour AdjustmentTuner AGC Adjustment Deflection System AdjustmentTest Mode Memo Block Diagrams Reference Information Circuit Board LocationSemiconductor Voltage Table Board WaveformsSemiconductor Location Table KV-21FX30 Power SUPPLY, DEFLECTION, Audio Amplifier Page 1/2Board Waveforms Power SUPPLY, DEFLECTION, Audio Amplifier Page 2/2Semiconductors DAN202K Board IC1201 TDA7497 IC Block DiagramsBRACKET, Main Cord PowerDescription Remark PART.NO DescriptionCATCHER, Push CLIP, Lead WireBeznet Assy SPRING, TensionSection Electrical Parts List Film PART.NOElect CapacitorShort Ceramic2KV MylarDiode MM3Z6V8T1 ConnectorPART.NO Description Remark Diode DAN202KDiode P6KE200ASY Diode D2SB60A-F04Diode D4SBL20UF1 JackJR9 ResistorJR4 JR7Carbon Fusible SolidMetal SWITCH, Tactil ThermistorVaristor TAB Contact DiodeSocket REF.NO PART.NO Description Remark £ 1-453-314-31 Transformer ASSY, FlybackIndividual Carton Service Promotions Dept
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