Panasonic BT-LH900P Service Manual page 21

1-2. ADC level adjustment
1. Open the service menu. (While simultaneously pressing the [INPUT]+[MENU/EXIT]+[HD
ZOOM/Ú] buttons, switch on the unit's power. And press the [MENU/EXIT] button once
again.)
2. Select "ADC CHECK" and press the [ENTER] button to go to the item's sub menu.
[ADC AUTO CHECK]
YpbPr
RGB
VIDEO NTSC PAL
OFFSET
CONTRAST
LEVEL
3. Follow the instructions at the button of the screen to input the signals shown in this table.
Order
①
②
③
④
⑤
⑥
⑦
⑧
4. Confirm that the color bar is on the LCD and press the [ENTER] button. Measurement starts
automatically.
5. Once measurement of one signal finishes, the next signal is displayed. Follow the
instructions to select the type of signal on the test signal generator and press the [ENTER]
button.
NOTE:
1. If in steps 4 and 5 the color bar fails to appear normally or messages fail to appear, press
[Ú], or change to another signal then return to the correct signal, or disconnect the cables
connecting the LCD and signal generator and then reconnect them.
2. The message shown below appears when ADC adjustment couldn't be performed. Make
sure the correct signal is being used or check the connections.
3. If this error occurs, start ADC adjustment from the beginning again.
480I 480P 1080
480I 480P 1080
COMPLETE : GREEN
UNCOMPLETE : BLEU
(AUTO) Y/G
0
0
0
INPUT 1080I-YPBPR
& PRESS ENTER KEY
LCD Display
INPUT1080I-YPBPR
INPUT1080I-RGB
INPUT480P-YPBPR
INPUT480P-RGB
INPUT480I-YPBPR
INPUT480I-RGB
INPUT NTSC-VIDEO
INPUT PAL-VIDEO
(Signal for adjustment: 100% full field color bar)
ERROR!!
PRESS MENU/EXIT KEY
PB/B PR/R
0 0
0 0
0 0
Signal input
1080/60I
1080/60I
480/60P
480/60P
480/60I
480/60I
480/60I
480/60I
EAD-2
Input format
YPBPR
RGB
YPBPR
RGB
YPBPR
RGB
VBS
VBS