JVC AV28WT5EPS - Page 30

No. 51776
A
V28WT5EPS AV24WT5EPS
30
[Only AV28WT5EPS / AV24WT5EPS]
Item
Measuring
instrument
Test point Adjustment part Description
[Method of adjustment without measuring instrument]Adjustment
of BLACK
OFFSET
(SECAM)
Ⅰ
ⅠⅠ
Ⅰ
Remote
control unit
7. BLACK
OFFSET
(R-Y)
***
(B-Y)
***
1. Receive a SECAM broadcast.
2. Select 2. V/C from SERVICE MENU.
3. Select 7. BLACK OFFSET with the FUNCTION UP/DOWN
key.
4. Set the initial setting value for BLACK OFFSET (R-Y) and (B-
Y) with
4
and
7
or
6
and
9
keys of the remote control.
5. If the picture is not the best with the initial setting value, make
fine adjustment until you get the best picture.
6. Press the MENU key and memorize the setting value.
[Method of adjustment using measuring instrument]Adjustment
of BLACK
OFFSET
(SECAM)
Ⅱ
ⅡⅡ
Ⅱ
Signal
generator
Oscilloscope
Remote
control unit
35 PIN (R-Y)
36 PIN (B-Y)
IC-301 ON
MAIN PWB
7. BLACK
OFFSET
(R-Y)
***
(B-Y)
***
1. Receive a SECAM COLOUR bar signal (full field colour bar
75% white).
2. Select 2. V/C from SERVICE MENU.
3. Select 7. BLACK OFFSET with the FUNCTION UP/DOWN
key.
4. Connect the oscilloscope between
35
pin of IC-301 and TP-E
(
#
).
5. By using
4
and
7
keys of the remote control, adjust the
BLACK OFFSET (R-Y) so that it becomes the waveform
changes from (a) to (b) shown in the figure.
6. Connect the oscilloscope between
36
pin of IC-301 and TP-E.
7. By using
6
and
9
keys of the remote control, adjust the
BLACK OFFSET (B-Y) so that it becomes the waveform
changes from (c) to (d) shown in the figure.
8. If the picture is not the best with the adjusted picture, make
fine adjustment until you get the best picture.
9. Press the MENU key and memorize the setting value.
[R-Y]
(a) (b)
[B-Y]
(c) (d)
REMOTE CONTROL UNIT
1 2 3
4
5
7
8
6
9
BLACK OFFSET ON
▼
▲
▼
▲
R-Y
R-Y
B-Y
B-Y
BLACK OFFSET
OFF