Pioneer PRO-730HDI Service Manual page 114

1
7 Panel Adjustment for 480i
A
Start
B
C
Procedures
1 Send the black-burst signal to the INPUT 1 connector.
Enter Adjustment mode by following the procedures described above.
2 With BRIGHT, adjust the gray part (panel) of the screen.
By observing TP5151 of the GREEN CRT DRIVE assembly with the oscilloscope, , adjust the brightness level which is low by 30V
from Black level of the main screen.
210V
D
GND
3 Switch the input signal to a 100%-white signal.
Adjust the panel part and the main screen with CONTRAST.
Observe the same site as described in Step 2 above, and adjust the amplitude of the luminosity.
Adjust so that the level of the luminosity of the panel and that of the main screen become the same.
E
F
114
1
2
1st FAC
ADJUSTMENT PANEL
BRIGHT –24
Telop : Yellow
Data value
31.7µS
Main screen
(black)
Approx. 30V
Approx. 0V
Main screen
(white)
The level of the panel part changes with the CONTRAST data.
The level of the main screen heightens or lowers in the reverse direction.
2
3
• Mode for adjusting the brightness, contrast of the gray part (panel)
of the 4:3 normal screen.
<Data value section>
or
<Adjustment item section>
1 2
Panel part: The level of this part changes with the BRIGHT data.
PRO-730HDI
3
4
: BRIGHT (– 128 to 127)
1
2 : CONTRAST (– 128 to 127)
4