White Balance Adjustment - Pioneer PDP-503CMX Product Training Manual

PDP-503CMX, PDA-5002

White Balance Adjustment

• Video Card (PDA-5002) is necessary for white balance adjustment for Video signal of RGB Assy.
• Adjust with Video system signal (525i) and RGB (PC VGA) signal.
• Adjust so that the Red and Blue signals becomes the same level and amplitude by reference with Green signal.
Input Signal Step
Connect a Video card in RGB Assy through a jig cable, and set it in the state that RGB Assy can measure.
1 (Refer to page 133 "Diagnosis of the Video Card (PDA-5002)".)
Cannot measure the signal level that does not use a jig cable.
Note: Be careful in the direction of connector of a jig cable.
Input a 525i signal to INPUT1 or INPUT2 with a component signal.
A signal pattern is only luminance signal such as lamp signal and a STEP signal.
2
And use the signal which black level (0IRE) and gradation can confirm.
Note: May use a standard NTSC Video signal as Y (luminance) signal of component signal.
In the signal input function (INPUT1 or INPUT2), perform the display mode of VIDEO signal to component.
3
MENU → SETUP → VIDEO SIGNAL : COMPONENT
Turn to standby once, and perform power supply ON with the factory mode once again.
4
MENU → SET → POWER ON
Turn ACL SW setting to OFF.
INITIALIZE mode
5
ACL SW : 3 key
Select OFF by right and left keys.
Decrease three steps of MAT CONT adjustment value of OFFSET-RGB1.
OFFSET mode: Select the RGB 1 mode by top and bottom keys
6
MAT CONT : 1 key
Decrease three steps of adjustment value by right and left keys.
Decrease two steps of MAT BRIGHT adjustment value of OFFSET-RGB1.
OFFSET mode: Select the RGB 1 mode by top and bottom keys
7
MAT BRIGHT : 2 key
Decrease two steps of adjustment value by right and left keys.
8 Take a trigger of oscilloscope with HD_PLL (3.3Vp-p) of K4805.
Video signal
9 Measure a signal waveform of Green signal at K4603, and measure the black level (0IRE) of signal and signal
amplitude.
AD R LOW adjustment
Measure the black level (0IRE) of Red signal at K4602, and adjust so that the level of AD R LOW to match the black
level (0IRE) of Green signal which measured with step 10.
Adjustment error: ± 0.05V
10
OFFSET mode: Select the RGB 1 mode by top and bottom keys
AD R LOW : 9 key
Adjust by right and left keys.
AD R HIGH adjustment
Measure the signal amplitude of Red signal at K4602, and adjust so that the level of AD R HIGH to match the signal
amplitude of Green signal which measured with step 10.
Adjustment error: ± 0.05V
11
OFFSET mode: Select the RGB 1 mode by top and bottom keys
AD R HIGH : 6 key
Adjust by right and left keys.
AD B LOW adjustment
Measure the black level (0IRE) of Blue signal at K4604, and adjust so that the level of AD B LOW to match the black
level (0IRE) of Green signal which measured with step 10.
12 Adjustment error: ± 0.05V
OFFSET mode: Select the RGB 1 mode by top and bottom keys
AD B LOW :11 key
Adjust by right and left keys.
AD B HIGH adjustment
Measure the signal amplitude of Blue signal at K4604, and adjust so that the level of AD B HIGH to match the signal
amplitude of Green signal which measured with step 10.
Adjustment error: ± 0.05V
13
OFFSET mode: Select the RGB 1 mode by top and bottom keys
AD B HIGH : 8 key
Adjust by right and left keys.
138
Adjusting Method