JVC AV-56WP30 Service Manual page 41

VIDEO ADJUSTMENT
Measuring
Item
Instrument
A-D CONVERTER Signal
OFFSET gener ator
adjustment
Oscilloscope
Remote
control unit
GBK
TP-E
CRT SOCKET PWB
Whole blac k signal (0%)
No signal
Regular mode
screen
Oscilloscope
waveform
Test point Ad justment Item
KG ADM012:
[G CRT
SOCKET PWB]
ADM013:
KB
ADM014:
[B CRT
SOCKET PWB]
KR
[R CRT
SOCKET PWB]
RGK
E
KG / KB / KR
CR T ca thode
No signal
The same potential
1. Receive a NTSC whole black (0%) signal.
R OFFSET
2. Select the STANDARD mode for the VIDEO STATUS.
3. Select REGULAR mode of ASPECT mode.
G OFFSET
4. Select that COLOR T EMP in s et at the LOW mode.
5. Connect the oscilloscope to KG (G cathode) on the G
B OFFSET
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
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.
No. 52007
Description
from COMPONENT VIDEO
AV-56WP30
terminal
41