Sony EVO-720P - Page 245

b-3-10,
Y
FM
Carrier
Frequency
Adjustment
(HK-3 Board}
ote;
This
adjustment
is
unnecessary
for
the
Player
side.
[Mode EE
[ Signal Non-signal
Measurement Point TPS5O1
Measuring Instrument Frequency counter
' Adjusting Element RV103"
|
Specified
Value
4.20+0,04
MHz
4
|
Adjusting method :
P)
Set
RV104
(EMPHASIS)
to
the
mechanical
center,
)
Adjust
to
4.204004
MHz
with
RV103.
)
Perform
“Deviation
adjustment”
and
“Emphasis
adjustment”,
4.20£0,04 MHz
>
Approx. 0.5 Vp-p
24 usec
Fig.
8-21.
Y
FM
Carrier
frequency
adjustment
8-3-11.
Y
FM
Deviation
Adjustment
(HK-3
Board)
Note:
This
adjustment
is
unnecessary
for
the
player
side,
Mode
Recording
and
playback
Signal Color bar
Measurement Point TP102
Measuring Instrument | Oscilloscope
Adjusting Element RV102
Playback level is
Specified Value 0.5040.02 Vp-p
Note:
Perform
“PB
Y
level
adjustment”
and
“Y
FM
carrier
frequency
adjustments”
first,
Adjusting method :
1) Record the color bar signal,
2) Play back the recorded tevel,
3) Confirm the playback output level,
Specification ; 0,50£0.02 Vp-p
4)
If
level
does
not
meet
the
specification,
turn
RV102
as
shown
below
and
repeat
steps
1)
to
3).
RV102 adjustment
direction
Table 8-2.
Value smaller than specified
Value larger than specified
White (100%) White level center
=
0.5620.02 Vp-p
a)
fee fio)
Fig. 822. Y FM deviation adjustment
SYNC level center
—323-—