Advertisement
AV-25PX
Measuring
Item
instrument
Adjustment
Remote
Of
control unit
SECAM
BLACK
OFFSET-Ⅰ Ⅰ Ⅰ Ⅰ
R-Y ▲ ▲ ▲ ▲
R-Y ▼ ▼ ▼ ▼
Adjustment
Signal
Of
generator
SECAM
BLACK
Oscillo-
OFFSET-Ⅱ Ⅱ Ⅱ Ⅱ
scope
Remote
control unit
(A)
(C)
24
Test point
Adjustment part
7. BLACK OFFSET
(R-Y)
(B-Y)
B-Y ▲ ▲ ▲ ▲
B-Y ▼ ▼ ▼ ▼
35 PIN (R-Y)
36 PIN (B-Y)
7. BLACK OFFSET
IC 1301 On
(R-Y)
MAIN PWB
(B-Y)
[R-Y]
(B)
[B-Y]
(D)
[Method of adjustment without measuring instrument]
1. Receive the SECAM broadcast.
2. Select 2. V/C from SERVICE MENU.
3. Select 7. BLACK OFFSET with the MENU UP / DOWN key.
4. Set the initial setting value for 7. BLACK OFFSET (R-Y) and
4
7
(B-Y) with
and
or
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 OK key and memorise the set value.
[Method of adjustment using measuring instrument]
1. Input the SECAM full field colour bar signal ( with 75% white).
2. Select 2. V/C from SERVICE MENU.
3. Select 7. BLACK OFFSET with the MENU UP / DOWN key.
4. Connect the oscilloscope between
4
7
5. By using
and
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
6
9
7. By using
and
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 OK key twice to return to the normal screen.
No. 51752
Description
6
9
and
keys of the remote control.
35
pin of IC 1301 and TP-E.
36
pin of IC 1301 and TP-E.
Advertisement
