Sony KV-14FV1B, Руководство по обслуживанию

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SECTION 3
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 the rated
power supply voltage, unless otherwise noted.
The PICTURE and Brightness controls should be set as follows
unless otherwise noted:
CONTRAST .......................... 100% (LIVE)
BRIGHTNESS control .......... 50%
COLOUR .............................. 50%
HUE ....................................... 50%
SHARPNESS ........................ 50%
Perform the adjustments in the following order:
1. Beam Landing
2. Convergence
3. Focus
4. Screen (G2)
5. White Balance
6. Picture Distortion
Note: Test Equipment Required.
1. Color bar/Pattern Generator
2. Degausser
3. Oscilloscope
Preparation:
• In order to reduce the influence of external magnetic
forces on the picture tube, face the TV set in an easterly
or westerly direction.
• Turn the power switch for the unit ON and erase the magnetic
force using a degausser.
3-1. BEAM LANDING
1. Degauss CRT screen.
2. Inut all-green pattern.
3. Adjust roughly landing at the centre of the screen by moving
the purity magnet.
4. Adjust toughly landing at both right and left sides of the screen
by sliding the DY forward or backward.
5. Adjust landing according to the lupe method or the allowance
mothod.
6. Adjust DY so the horizontal tilt of DY is within the standard.
Product standard is as follows.
Purity control
B
G
R
Fig.3-1
Fig.3-2
Fig.3-3
a b
c d
b
d
a
c
Purity control
corrects this area.
Disk magnets or rotatable
disk magnets correct these
areas (a-d).
Deflection yoke positioning
corrects these areas.
Fig.3-4
7. Use disk magnet, if landing at the corner is not good.
Disk mg shold be applyied on the funnel. Don't use mag if
possible because of picture distortion.
8. Screw down the DY.
±
1
°
±
1
°