Afc Operation Check - Hitachi 36SDX88B Service Manual

2.4 AFC Operation Check
Preparation for adjustment Adjustment procedure
(1) Connect Jig to the Antenna
('I) Select Main Picture.
Terminal as shown below.
Notes
(2) Receive standard signal, which isn't
offset, by channel up/down or direct
selection buttons
Check if it is pulled in the standard
tuning point.
(3) Receive +I SMHz offset signal.
Check if it is pulled in the standard
tuning point.
(4) Receive -1 .SMHz and offset signal. 1) Use Circle Pattern or
Check that it is pulled in the standard Color Bar signal when
tuning point. modulating.
Checking Jig : all channel converter is appropriate.
------------- -------------
1 1
I I
I I
1 VIDEO
I
I
I
I
: IF De-modulator i
I
I
I
. I
I
I
+
I
I
I
I
I
I
RF
I
I
Converter :
I
I
I
I
I
-------------
v
RF I
To Ant
I
---B-B ---B-B
1
RF I
To Ant
51