Sony KV-T29SN81 service manual Section SET-UP Adjustments, Beam Landing

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KV-T29SN81

RM-870

SECTION 3

SET-UP ADJUSTMENTS

The following adjustments should be made when a complete

Perform the adjustments in order as follows :

realignment is required or a new picture tube is installed.

1.

Beam Landing

These adjustments should be performed with rated power

2.

Convergence

supply voltage unless otherwise noted.

 

3.

Focus

 

 

 

4.

White Balance

Controls and switch should be set as follows unless otherwise noted:

 

Note : Test Equipment Required.

PICTURE control

normal

 

1.

Color-bar/Pattern Generator

BRIGHTNESS control

normal

 

2.

Degausser

 

 

 

3.

Oscilloscope

................................................................................................................................................................................................................................

Preparation :

In order to reduce the influence of geomagnetism on the set's picture tube face it east or west.

Switch on the set's power and degauss with the degausser.

3-1. BEAM LANDING

1.Input a white signal with the pattern generator.

Contrast }

normal

Brightness

2.Position neck assy as shown in Figure 3-1.

3.Set the pattern generator raster signal to green.

4.Move the deflection yoke to the rear and adjust with the purity control so that the green is at the center and the blue and the red take up equally sized areas on each side.

(See Figures 3-1 through 3-3.)

5.Move the deflection yoke forward and adjust so that entire screen is green. (See Figure 3-1.)

6.Switch the raster signal to blue, then to red and verify the condition.

7.When the position of the deflection yoke has been decided, fasten the deflection yoke with the screws.

8.If the beam does not land correctly in all the corners, use a magnet to adjust it. (See Figure 3-4.)

Neck assy

G1 G2 G3

Fig. 3-1

Purity control

Fig. 3-2

BLUE RED

GREEN

Fig. 3-3

Purity control corrects this area.

Disk magnets or rotatable

ab disk magnets correct these areas (a-d).

cd

Deflection yoke positioning corrects these areas.

a

c

b

d

Fig. 3-4

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Contents Trinitron Color TV Specifications KV-T29SN81Disassembly Table of ContentsDiagrams Electrical Parts List SET-UP AdjustmentsSelf Diagnosis Function Flickering FrequencySection General Connections Presetting channels Adjusting the picture and sound Selecting a stereo or bilingual program Troubleshooting Rear Cover Removal F1 Board Removal Section DisassemblyBoard Removal Service Position Replacement of Parts Demagnetization Coil Removal Replacement of Light Guide Power Button∙ Removal of ANODE-CAP ∙ Removing Procedures Picture Tube RemovalSection SET-UP Adjustments Beam LandingConvergence Horizontal and Vertical Static ConvergenceBlue Red Neck assy VM board Dynamic Convergence Adjustment Preparation Focus Adjustment G2 Screen and White Balance AdjustmentsSection Circuit Adjustments Adjustments with CommanderAdjustment Method Adjustment Item Table No OP0 * Input data are different according to models Item Number 00 Memo Semiconductors EL1Z GP08DChassis SectionExploded View Electrical Parts List PLUG, Connector 6P PIN, Connector 4PPLUG, Connector 5P CONNECTOR, Board to Board 12PDiode EL1Z Diode RU4DSDiode D1NL20-TA Diode LNK0220022GTransistor 2SC3209LK Transistor 2SC2410SNTransistor 2SA1091-O Transistor 2SC4927-01Metal Chip WirewoundCarbon FusibleVariable Resistor RES, ADJ, Carbon 2.2M SwitchSolid RES, ADJ, Carbon 470KSawf Transformer REF. NO. Part no Description Remark Spark GAPGAP, Spark Surface Wave Filter TRANSFORMER, Line FilterIC CXA1110BS Carbon Coil SwitchFilter IC MSP3410D-PP-B4Carbon Variable Resistor SOCKET, CRT CoilTransistor 2SC2611 FUSE, TIME-LAG 4A/250V Resistor CLIP, Fuse CapacitorFuse Diode RD3.6M-B2Transistor 2SD774-34 ConnectorPLUG, Connector 7P Crystal VibratorTransistor 2SA1837 IC NJM2903DIC NJM2904D Coil Transistor 2SC4793Battery COVER, Remote Commander Accessories and Packing MaterialsRemote Commander Miscellaneous COIL, Demagnetization