Pioneer PRO-1000HDI Service Manual page 138

1
Input Signal Step
A
B
Black level of
the Green signal
Video signal
Black level of
the Red or Blue signal
Increase the MAT CONT adjustment value of OFFSET-RGB1 by 3.
OFFSET mode: Select RGB 1 mode with the top and bottom keys.
14
MAT CONT : "1" key
Increase the adjustment value by 3 with the right and left keys.
Increase the MAT BRIGHT adjustment value of OFFSET-RGB1 by 2.
C
OFFSET mode: Select RGB 1 mode with the top and bottom keys.
15
MAT BRIGHT : "2" key
Increase the adjustment value by 2 with the right and left keys.
Turn the ACL SW setting to ON.
INITIALIZE mode
16
ACL SW : "3" key
Select ON with the right and left keys.
Input a RGB (PC) signal to the INPUT1 or INPUT2.
Use a signal consisting of the luminance signal only, such as a ramp signal or STEP signal, whose black level (0IRE)
1
and gradation can be checked.
• Recommended signal: VESA VGA@60Hz
Set the unit to Standby mode then to Factory mode.
2
MENU → SET → POWER ON
D
3
Take a trigger of the oscilloscope with HD_PLL (3.3Vp-p) of K4805.
4 Measure the signal waveform of the Green signal at K4603, and measure the black level (0IRE) and amplitude.
RGB (PC)
AD R LOW adjustment
signal
Measure the black level (0IRE) of the Red signal at K4602, and adjust the level of AD R LOW so that its black level
(0IRE) becomes the same as that of the Green signal measured in step 9.
5
Tolerance: ± 0.05V
OFFSET mode: Select RGB 1 mode with the top and bottom keys.
AD R LOW : "9" key
Adjust with the right and left keys.
AD R HIGH adjustment
E
Measure the signal amplitude of the Red signal at K4602, and adjust the level of AD R HIGH so that its signal
amplitude becomes the same as that of the Green signal measured in step 9.
6
Tolerance: ± 0.05V
OFFSET mode: Select RGB 1 mode with the top and bottom keys.
AD R HIGH : "6" key
Adjust with the right and left keys.
F
138
1
2
Adjust the black level of the Red and Blue
signals referring to that of the Green signal
2
3
Adjusting Method
Adjust the signal amplitude of the Red and Blue
signals referring to that of the Green signal
Green signal
waveform
Red or Blue
signal
Signal amplitude
waveform
of the Green signal
PRO-1000HDI
3
4
Green signal
waveform
Red or Blue
signal
waveform
4