Panasonic PT-TW230U Service Manual page 38

Electrical Adjustments
4. Auto calibration adjustment [Component]
Input mode Computer 1 (Component)
Input signal 480i component signal
Signal pattern 8 color bar
1. Enter the service mode
260
2. Select Group " ", No. "
0 1
. After the auto-calibration com
value from " " to " "
, "OK" will appear on the screen.
pleted
Below adjustments are performed when the above auto
calibration is failed.
Pedestal adjustment [Component]
Input signal 480i component signal
Signal pattern 16-step gray scale
Equipment Oscilloscope
1. Enter the service mode.
2. Adjust the black level on each test point to be minimum
by changing the data value of Group - No.
Group - No. Test Points
0 - 0 TP35G
0 - 1 TP35R
0 - 2 TP35B
Gain adjustment [Component]
1. Enter the service mode.
2. Adjust the amplitude "
to be minimum by changing the data value of Group -
No.
Group - No. Test Points
0 - 3 TP35G
White Level
(a)
0
" and then change data
a
" of waveform at each test point
5. Auto calibration adjustment [Video]
Input mode
Input signal
Signal pattern
1. Enter the service mode.
260
2. Select Group "
0
value from " " to "
"OK"
pleted, will appear on the screen.
Below adjustment is performed when the above auto
calibration is failed.
Gain adjustment [Video]
Equipment
1. Enter the service mode.
2. Adjust the amplitude "
to be minimum by changing the data value of Group -
No.
Group - No. Test Points
20 - 0 TP35G
(a)
-38-
Video
Composite video signal
16-step gray scale
0
", No. " " and then change data
1
". After the auto-calibration com-
Oscilloscope
a
" of waveform at each test point
White Level