No. 52007
AV-56WP30
41
VIDEO ADJUSTMENT
Item
Measuring
Instrument
Test point
Ad justment Item
Description
A-D CONVERTER
OFFSET
adjustment
Signal
generator
Oscilloscope
Remote
control unit
KG
[G CRT
SOCKET PWB]
KB
[B CRT
SOCKET PWB]
KR
[R CRT
SOCKET PWB]
ADM012:
R OFFSET
ADM013:
G OFFSET
ADM014:
B OFFSET
1. Receive a NTSC whole black (0%) signal.
2. Select the STANDARD mode for the VIDEO STATUS.
3. Select REGULAR mode of ASPECT mode.
4. Select that COLOR T EMP in s et at the LOW mode.
5. Connect the oscilloscope to KG (G cathode) on the G
CRT SOCKET PWB.
6. Select 8.PP from the SERVICE MENU.
7. Select
ADM013
<
G OFFSET
>
.
8. Adjust ADM013 s o that the central 0% signal portion
and the non-signal portion of both sides may become
the same voltage.
9. Connect the oscillosc ope to KB (B cathode) on the B
CRT SOCKET PWB.
10. Select ADM014
<
B OFFSET
>
.
11. Adjust ADM014 s o that the central 0% signal portion
and the non-signal portion of both sides may become
the same voltage.
12. Connect the oscilloscope to KR (R cathode) on the R
CRT SOCKET PWB.
13. Select ADM012
<
R OFFSET
>
.
14. Adjust ADM012 s o that the central 0% signal portion
and the non-signal portion of both sides may become
the same voltage.
15. Press the MUTING key and memorize the set values.
16. Input 480i / 480p / 750p / 1080i component whole black
signal from COMPONENT VIDEO terminal
respectively.
17. Set the data of ADM012, ADN013 and ADM014, which
were obtained in the adjustments above, by each
signal.
18. Press the SPLIT key to display two pictures .
19. Input NTSC / 480I / 480p / 750p / 1080i c omponent
whole blac k signal to the MAIN picture, respec tively.
20. Set the data of ADM012, ADN013 and ADM014 in the
same manner as for step 16 abov e.
21. Press the POP key to display four pictures.
22. Regardless of the type of signal, input a s ignal.
23. Set the data of ADM012, ADN013 and ADM014 in the
same manner as for step 16 abov e.
CRT SOCKET PWB
TP-E
GBK
RGK
E
KG / KB / KR
CRT cathode
Whole blac k signal (0%)
No signal
No signal
Oscilloscope
waveform
Regular mode
screen
The same potential
Summary of Contents for AV-56WP30
Page 79: ...No 52007 AV 56WP30 79 Memo ...