Sony KV-27V40 service manual Section SET-UP Adjustments, Beam Landing

KV-27V40 / 27V45 / 27V65 / 29VL40 / 29VL65A / 29VL65C / 29VL85 / 29VL95

SECTION 3

SET-UP ADJUSTMENTS

The following adjustments should be made when a	Perform the adjustments in order as follows:
complete realignment is required or a new picture	1.	Beam Landing
tube is installed. These adjustments should be performed
with rated power supply voltage unless otherwise noted.	2.	Convergence
	3.	Focus
	4.	Screen (G2) and White Balance
The controls and switch should be set as follows	Note: Test Equipment Required
unless otherwise noted:
PICTURE control ................. normal		1.	Color Bar Pattern Generator
		2.	Degausser
BRIGHTNESS control ......... normal		3.	DC Power Supply
		4.	Digital Multimeter

3-1. BEAM LANDING

Preparation:

•Feed in the white pattern signal.

•Before starting, degauss the entire screen.

1.Input a raster signal with the pattern generator.

2.Loosen the deflection yoke mounting screw, and set the purity control to the center as shown in Fig.2.

3.Turn the raster signal of the pattern generator to green.

4.Move the deflection yoke backward, and adjust with the purity control so that green is in the center and red and blue are at the sides evenly. (Fig.3)

5.Move the deflection yoke forward, and adjust so that the entire screen becomes green. (Fig.1)

6.Switch over the raster signal to red and blue and confirm the condition.

7.When the position of the deflection yoke is determined, tighten it with the deflection yoke mounting screw.

8.When landing at the corner is not right, adjust by using the disk magnets. (Fig.4)

Fig. 2

Fig. 3

Disk magnets or rotatable disk magnets correct these areas (a-d).

Fig. 1 Fig. 4

— 24 —