Sony KV-21SE43C, KV-20S90 service manual SET-UP Adjustments, Beam Landing, Adjustment Procedure

KV-20S90 / 21SE43C

SECTION 2: 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 supply	2.	Convergence
	3.	Focus
voltage unless otherwise noted.	4.	Screen (G2)
Set the controls as follows unless otherwise noted:	5.	White Balance
	Note Test Equipment Required:
VIDEO MODE: Standard	1.	Color Bar Pattern Generator
PICTURE CONTROL: Normal	2.	Degausser
BRIGHTNESS CONTROL: Normal	3.	DC Power Supply
	4.	Digital Multimeter
2-1. BEAM LANDING	6. Switch over the raster signal to red and blue and confi rm the
	condition.
Before beginning adjustment procedure:	7. When the position of the defl ection yoke is determined, tighten it with
	the defl ection yoke mounting screw.
1. Degauss the entire screen.
	8. If landing at the corner is not right, adjust by using the disk magnets.
2. Feed in the white pattern signal.
ADJUSTMENT PROCEDURE

1. Input a raster signal with the pattern generator.

2.Loosen the defl ection yoke mounting screw, and set the purity control to the center as shown below:

Purity Control

	orDiskrotatablemagnetsdik		correctsPuritycontrolthisarea
			a	b
	db		correctstheseareas
3. Turn the raster signal of the pattern generator to green.				d
	thesemagnetsareascorrect(a-d)
4. Move the defl ection yoke backward, and adjust with the purity control		Deflectionyokepositioning
so that green is in the center and red and blue are even on both					a
sides.				c
Blue Red
Green

5.Move the defl ection yoke forward, and adjust so that the entire screen becomes green.

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