SONY KV-21FW150
Instrukcja Serwisowa

KV-21FW150

SECTION 2: SET-UP ADJUSTMENTS

The following adjustments should be made when a complete realignment is required or a new picture tube is installed. These adjustments should be performed with rated power supply voltage unless otherwise noted. Set the controls as follows unless otherwise noted: Picture control NORMAL Brightness control NORMAL

Perform the adjustments in order as follows: 1. Beam Landing 2. Convergence 3. Focus 4. Screen (G2) 5. White Balance Note Test Equipment Required: 1. Color Bar Pattern Generator 5. Oscilloscope 2. Degausser 6. Landing Checker 3. DC Power Supply 7. XCV Adjuster 4. Digital Multimeter 6. 7. 8. Switch over the raster signal to red and blue and con�rm the condition. When the position of the de�ection yoke is determined, tighten it with the de�ection yoke mounting screw. If landing at the corner is not right, adjust by using the disk magnets.
Purity control corrects this area. Disc magnets or rotatable disc magnets correct these areas (a-d).

2-1. BEAM LANDING
Before beginning adjustment procedure: 1. Feed in the white pattern signal. 2. In order to reduce the geomagnetism on the set�s picture tube, face it east or west.

Adjustment Procedure
1. 2. Input a raster signal with the pattern generator. Loosen the de�ection yoke mounting screw, and set the purity control to the center as shown below:

b c

a d

Purity control
Deflection yoke positioning corrects these areas.

b c

a d

3. 4.

Turn the raster signal of the pattern generator to green. Move the de�ection yoke backward, and adjust with the purity control so that green is in the center and red and blue are even on both sides.

Blue Red Green

5.

Move the de�ection yoke forward, and adjust so that the entire screen becomes green.

KV-21FW150

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