akira CT-21DS9A, Service Manual

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Model No: CT-21DS9A_21DS9CP_21DS9CP(IKD)_21DS9CP(SKD)_21DS9N_21DS9R
Version 1.0
10
4. (A) White Balance Adjustment (Applied in factory only)
4.1. Set the TV set to AV mode. Receive black white pattern (Color Temperature test pattern).
4.2. Insert 6 Pin Service flat cable into CN002. Press adjustment keys, and then go to automatic white
balance adjustment.
4.3. After adjusting well, remove the 6 Pin Service flat cable.
4. (B) White Balance adjustment (Applied when servicing)
4.1. Set the TV set to AV mode. Receive black white pattern (Color Temperature test pattern).
4.2. Put the test probe 1 of CRT color analyzer (CA-100) on the Low Bright area and the test probe 2
on the High Bright area. Adjust bright and contrast to get 5nit of low bright area and 80 nit of high
bright area.
4.3. 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
5.1. Receive GREY SCALE signal. (PHILIPS PM54200, 11 STEP)
5.2. Set TV at normal mode.
5.3. 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.