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6-3. PA-239 Board Adjustment
6-3. PA-239 Board Adjustment
6-3-1. PA Balance Adjustment
Equipment: Oscilloscope
Object:
Grayscale chart
Preparation
Extend the VA-196 board with the extension board
(EX-738).
Adjustment Procedures
1. Setting for MSU-700A
CLOSE button → ON (lit)
2. Black balance adjustment
Adjust levels for R, G and B as follows.
Test point/
EX-738 board
R-ch
TP22
G-ch
TP14
B-ch
TP6
Specification:
Minimize the level at A (width).
A : Minimize
100mV
3. Setting for MSU-700A
CLOSE button → ON (dark)
4. Shoot the grayscale chart so that the chart frame is
aligned with the underscanned monitor frame (F10,
2000 lx, 3200 K).
6-8 (E)
Adj. point/
PA-239 board
1RV102
1RV202
1RV302
(GND: E1, Trigger: TP71)
5us
5. White balance adjustment
Adjust levels for R, G and B as follows.
Test point/
EX-738 board
R-ch
TP22
G-ch
TP14
B-ch
TP6
Specification:
Minimize the level (width) of the
stepped part.
Minimize
B
50mV
W
L
RV301
RV201
RV101
PA-239 Board
Adj. point/
PA-239 board
1RV101
1RV201
1RV301
(GND: E1, Trigger: TP71)
10us
RV302
RV202
RV102
HDC-900/950 MM
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