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VT-G14
VT-G21
Ë Ë Ë Ë Ë CRT CUT-OFF, BACKGROUND AND SUB-CONTRAST ADJUSTMENT (2)
3. SUB-CONTRAST
2
(I
C bus data adjustment)
1. Receive the crosshatch pattern signal.
2. Put the set in the service mode and select the SUB-CONTRAST mode (CONT).
3. Adjust the sub-contrast data to "10" (VT-G21)/ "0" (VT-G14).
4. Exit from the service mode.
Ë Ë Ë Ë Ë HORIZONTAL AND VERTICAL CIRCUIT ADJUSTMENT
1. SERVICE MODE DATA ADJUSTMENT
Put the set in the service mode.
Turn up or down the data for this adjustment.
I
2
C bus data adjustment
» V-AMP 50 Hz
A) Select the V-AMP mode (V-AMP). Adjust the
overscan to 10% .
» V-LINEARITY 50 Hz
B) Select the V-LIN mode (V-LIN). Adjust to get the
best linearity.
» V-OUT PHASE 50 Hz (V-CENTER)
C) Select the V-OUT POS mode (V-POS). Align the
screen center with the cathode ray tube's geo-
metrical center.
» H-POS 50 Hz (H-CENTER)
D) Select the H-POS mode (H-POS). Make the dis-
tances "A" and "B" on both sides equal.
Exit from the service mode.
For the V-AMP 60 Hz, V-LINEARITY 60 Hz, V-OUT PHASE 60 Hz, and H-POS 60 Hz adjustments, their corrected
data are automatically entered when the corresponding 50 Hz mode adjustments are made. Check these data on
the 60 Hz mode screen. Readjust any of them if required. (The 50 Hz and 60 Hz modes are selected on the
screen.)
Once the adjustment has been made in the 60 Hz mode, do not change it in the 50 Hz mode.
2. FOCUS ADJUSTMENT
1. Receive the monoscope pattern signal.
2. Make the PICTURE ADJUST setting to NORMAL.
3. Adjust the focus control so that the middle areas
between the pattern's center and the screen's both
ends be in the best focus.
Note :
The selected channels in parentheses have the
following signals.
Monoscope pattern (50 Hz) signal
A
18
B
Fig.6
Adjust point
Fig.7
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