akira CT-29TP9An, Service Manual

Page: 29 / 38

29
Model No: CT-29TP9AS-5P60
Version 1.0
PURITY ADJUSTMENT
1. Before color purity adjustment, warm up the TV set over 15 minutes and fully degauses.
2. Receive pure white signal in AV status and set the TV receiver dynamic.
3. Go to factory mod MENU2. After write down the values of R-BIAS and B-BIAS, set the
values of R-BIAS and B-BIAS zero.
4. Loosen the clamp screw of the deflection yoke and pull the deflection yoke towards color
purity Magnetic loop.
5. Adjust color purity magnetic loop to make the green area at the center of CRT screen.
6. Slowly push the deflection yoke toward the front of CRT and set it where a uniform green
field is obtained. Tighten the clamp screw of the deflection yoke.
7. Restore the values of R-BIAS, G_BIAS and B-BIAS.
CONVERHENCE ADJUSTMENT
1. Receive a dotted pattern. Set the TV receiver dynamic.
2. Loose the convergence magnet clamper and align red with blue dots at the center of the screen
by rotating (R, B) static convergence magnets.
3. Align Red/Blue with green dots at the center of the screen by rotating (RB-G) static
convergence magnet.
4. Remove the DY wedges and slightly tilt the deflection yoke horizontally and vertically to
obtain the good.