akira CT-21TF9, Service Manual

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Model No: CT-21TF9A_21TF9C_21TF9CP_21TF9CP(IKD)_21TF9CP(SKD)_21TF9CP(M)_21TF9N_21TF9R
Version 1.0
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4.6. Go to factory mode “MENU2” according to 4-4-2. Obtain Low Bright area to
x=281and y=311 by adjusting R.bias and B.bias. Obtain High Bright area to
x=281and y=311 by adjusting R.drive and B.drive. Obtain both area to x=281
and y=311 by adjusting the two status repeatedly.
5.
SUB-BRIGHT ADJUSTMENT
Receive GREY SCALE signal. (PHILIPS PM54200, 11 STEP)
5.1. Set TV at normal mode.
5.2. Get into factory mode, adjust sub-bright option to make the picture same as
below.
4.
Totally dark Can be seen the brightness
6. VERTICAL SIZE AND PINCUSHION ADJUSTMENT.
6.1. Receive monoscope pattern. Set TV standard status. Adjust V.size to obtain
picture’s vertical redisplay ratio more than 90% in factory mode “MENU1”.
6.2. Receive cross hatch pattern. Set TV standard status. Adjust V.LINE and V.SC
to obtain picture’s vertical pin cushion a good status in factory mode
“MENU1”.
6.3. Receive cross hatch pattern. Set TV standard status. In factory mode
“MENU1” adjust V.POSITION to obtain picture’s vertical center at the center
of CRT screen.
7. HORIZONTAL CENTERING ADJUSTMENT.
7.1. Receive PHILIPS PATTERN. Set TV standard status. Adjust H.PHASE to
obtain horizontal center at the center of CRT screen.
8. SECAM COLOR DECODER ALIGNMENT.
8.1. Receive the GREY SCALE /COLOR BAR signals. Enter into the factory
mode. Adjust the values of Secam R-Y DC and Secam B-Y DC to make the
gray scale to the normal color.
9. COLOR PURITY ADJUSTMENT
9.1. Before color purity adjustment, Warm up the TV set over 15 minutes and
fully degauss.
9.2. Receive pure white signal in AV status and set the TV receiver dynamic.
9.3. Go to factory mode “MENU2”. After write down the values of R-BIAS and
B-BIAS, set the values of R-BIAS and B-BIAS zero.
9.4. Loosen the clamp screw of the deflection yoke and pull the deflection yoke
towards color purity magnetic loop.
9.5. Adjust color purity magnetic loop to make the green area at the center of CRT
screen.
9.6. 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.
9.7. Restore the values of R-BIAS, G-BIAS and B-BIAS