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10. V FM deviation adjustment
(VS-99 board)
Mode
Record and playback
Signal
Color bar
Measurement Point
Pin@ ofiC201 (DLIN 1)
Measuring Instrument
Oscilloscope
Adjustment~Page····~·
··~
f)
Adjustment Address
51 (DEY. -L)
Specified Value
A=0.50±0.025V
Note: Check that the "Emphasis input level adjustment" and
"PB Y level adjustment" have been completed.
Adjusting method:
Order
1
2
3
4
5
6
Page
1
f)
f)
Address
00
51
51
/
White (1 00%)
Fig. 9-15.
Related Adjustments:
"Y FM carrier frequency adjustment".
Data
01
\
Procedure
Releasing of protect.
Record the color bar signal.
Play back the recorded signal.
Compare the playback signal level with the specified
value.
If it satisfies the value, the adjustment is completed.
If not,:
Change the data with the PLAY and STOP buttons.
•
Decrease the data if the playback signal level is
greater than the specified value.
•
Increase the data if smaller.
Press the PAUSE button.
Center
of
wite level
I
t
A
Center
of
sync level
-238-
Conditions
11. V FM carrier frequency adjustment
(VS-99 board)
Mode
Record
Signal
No signal
Measurement Point
Pin@) of IC201 (Y RF OUT)
Measuring Instrument
Frequency counter
Adjustment Page
f)
Adjustment Address
4F (CAR. -L)
Specified Value
4.20±0.04
MHz
Adjusting method:
Order
Page
Address
Data
Procedure
1
00
01
Releasing of protect.
2
D
4F
Change the data with the PLAY and STOP buttons, and
adjust theY FM carrier frequency to the specified
value.
3
f)
4F
Press the PAUSE button.
4.20±0.04 MHz
Approx. 430 mVp-p
l
Fig. 9-16.
-239-
Conditions
Recording mode, no signal
input
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