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TC-14A12P / TC-20B12
Service Adjustments and Calibrations
5. VERTICAL HEIGHT (V-AMP 50HZ) CALIBRATION
5.1. Receive a PAL-N Philips pattern.
5.2. Adjust V-AMP-50Hz so that the Philips pattern’s circle height
be the same dimension of the width.
6. VERTICAL HEIGHT (V-AMP 60HZ) CALIBRATION
6.1. Receive a monoscope pattern.
6.2. Adjust V-AMP-60Hz so that:
[C] and [D] (see below) be 1.9~2.2 (typical 2.0) for 14 inches and
1.5~2.0 for 20 inches.
[A] and [B] be 1.5~2.3 (typical 2.0) for 14 inches and 1.5~1.6 for
20 inches.
6.3. Memorize in EEPROM.
CRT CUT OFF CALIBRATION
1. PREPARATION:
1.1. Receive a monoscope pattern.
1.2. Position DACs with the data below:
• BRT AND S-BRT = 32H.
• RGB CONTRAST = 06H for 14 inches and 07H for 20 inches.
• SUB-CONTRAST = 21H
• R,G,B DRIVE = 31H
• R,G CUT = 31H
1.3. Press “5” (AKB OFF) and confirm that OSD becomes blue.
1.4. Connect the oscilloscope in TPL7 and adjust BRT to obtain
130V in the figure below.
1.5 Adjust screen to minimum.
1.6. Press “5” (AKB ON) and confirm that OSD becomes white.
WHITE BALANCE CALIBRATION
1. PREPARATION:
1.1. This adjustment should be accomplished after 30 minutes of
heating.
1.2. Receive a white balance. (This sign should contain burst sign).
1.3. Position DAC of MENU OF IMAGE for DYNAMIC NORMAL.
1.4. Fully degauss the CRT by using an external degaussing coil.
1.5. Position the color analyzer in contact with the face of CRT.
• Assure that the CUT OFF voltage calibration has been done.
• If the value in the color analyzer is below Y(H) date, adjust
CONTRAST for 32 and connect a short circuit jumper between
TPA10 and TPA20.
AB
CD
130V
0V
2. CALIBRATION:
[1] LOW LIGHT CALIBRATION
1. Adjust S-BRT, so that Y = Y(L).
2. Adjust R-CUT OFF, so that x = x(L).
3. Adjust G-CUT OFF, so that y = y(L).
[2] HIGH LIGHT CALIBRATION
1. Adjust S-BRT, so that Y = Y(H).
2. Adjust R-DRIVE, so that x = x(H).
3. Adjust B-DRIVE, so that y = y(H).
[3] Repeat the procedures [1] and [2].
SUB-BRIGHTNESS CALIBRATION
1. PREPARATION:
1.1. Receive a windows pattern.
1.2. Position MENU OF IMAGE in DYNAMIC NORMAL.
2. CALIBRATION:
2.1. Position the color analyzer in an low light image area of CRT.
2.2. Adjust S-BRT <CHK 5>, so that Y=5.5 ± 0.2.
SUB-CONTRAST CALIBRATION
1. PREPARATION:
1.1. Receive a windows pattern.
1.2. Position MENU OF IMAGE in DYNAMIC NORMAL.
2. CALIBRATION:
2.1. Position the color analyzer in an hight light image area of CRT.
2. Adjust the SUB-CONTRAST <CHK 4>, so that Y=300±10 for
14 inches and Y=160±10 for 20 inches.
3. If it is impossible to obtain the adjustment above, adjust the
SUB-CONTRAST <CHK 4> and confirm the SUB-BRIGHTNESS
adjustment.
FOCUS CALIBRATION
1. PREPARATION:
• Assure that the SUB-BRIGHTNESS adjustment has been
done.
1.1. Receive a Philips or monoscope pattern.
1.2. Position MENU OF IMAGE in DYNAMIC NORMAL.
2. CALIBRATION:
2.1. Adjust the FOCUS variable resistor.
1 2 3 3 2 1
4
Using the Philips pattern:
• Take as reference to 3rd vertical
line.
Using the monoscope pattern:
• In the number 4