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Onkyo DX-6930 - Page 14

Onkyo DX-6930
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3.
Focus
gain
adjustment
Set the
output
of
AF
oscillator
to
1kHz,
1~1.5Vp-p.
Play
the
track
2
of
test
disc.
Connect
the
oscilloscope
and
the
AF
oscillator
as
shown
below.
AF
oscillator
GND
Photo
3
Adjust
R117
until
1kHz
components
of
channels
1
and
2
on
oscilloscope
become
same
level.
After
adjustment,
disconnect
the
AF
oscillator
and
the
oscilloscope.
4.
Tracking
gain
adjustment
Set
the
output
of
AF
oscillator
to
1.2kHz,
1~1.5Vp-p.
Play
the
track
2
of
test
disc.
Connect
the
oscilloscope
and
the
AF
oscillator
as
shown
below.
AF
oscillator
GND
Photo
4
Adjust
R116
until
1.2kHz
components
of
channels
1
and
2
on
oscilloscope
become
same
level.
After
adjustment,
disconnect
the
AF
oscillator
and
the
oscilloscope.
After
adjustment,
confirm
that
the
center
of
tracking
error
signal
becomes
GND
level.
=O
Oscilloscope
Vertical
:
0.2V/div.
Holizontal:
0.2
ms/div.
Oscilloscope
CH
1
CH
2
Vertical
:
0.2V/div.
Holizontal:
0.2
ms/div.
PIO6
GND
8
HF
FE
|
P1IO7
8
FE2
QjTE
|
R06
TE2
TR
OFFSET
b)r
i09
RNG
FOCUS
OF
FSET
TR
GAIN
RUT
FOCUS
GAIN
Ean
oe
DX-6930
DX-6920

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