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Sansui MC-X7 - Adjustment Procedures; Tracking Offset Adjustment; Focus Offset Adjustment; Tracking Gain Adjustment

Sansui MC-X7
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MC-X7/X7L
<Compact
Disc
Player
Section>
MC-X7/X7L
|
<Compact
Disc
Player
Section>
6.
ADJUSTMENT
Note:
1.
This
adjustment
require
the
amplifier
models
MC-X7
or
MC-X7L.
AMP
.
Connections
are
shown
in
Fig.
6-1.
.
Turn
the
power
OFF
before
removing
the
bonnet.
.
See
Figure
6-2
for
the
locations
where
adjustments
are
to
be
carried
out.
15P
Connector
Cable
Sli
&
W
hb
5.
Use
the
EIAJ
test
disk
CD-1.
6.
The
following
band
pass
filter
(BPF)
is
used
for
adjustments.
17P
Conrpector
7.
In
executing
steps
2
to
5,
connect
the
probe
after
playing
the
disc.
Cable
Band
Pass
Filter
(BPF)
Fig.
6-1
IN
OUT
20k
O.01uF
20k2
Ste
Measuring
Adjustment
P
Location
Location
Connect
an
oscilloscope
to
T1
of
TP2.
Conditions
and
Notes
¢
Ground
T2
of
TP2.
¢
Playback
the
8th
track
of
CD-1.
Tracking
offset
adjustment
Set
the
oscilloscope
to
the
DC
range.
Adjust
so
that
a
and
b
have
the
same
level.
Connect
an
fVR2
Set
to
maximum.
¢
Playback
the
8th
track
of
CD-1.
oscilloscope
to
the
RF
of
TP1.
2
Focus
offset
Carry
out
adjustments
to
achieve
a
clean
overall
pattern
and
so
that
the
indicated
portion
is
wide
and
symmetrical.
fVR3
Using
the
indicated
voltage
at
T1
of
TP2asa
reference,
adjust
the
voltage
at
T2
to
—-3.5dB.
TP2
AC
Volt
Meter
File|
Connect
AC
volt-
meter
to
T1
of
TP2
via
the
BPF.
Connect
AC
volt-
meter
to
T2
of
TP2
via
the
BPF.
Tracking
gain
adjustment
220K
Audio
OSC
800
Hz
0.5Vp-p
AC
Volt
Meter
*
Playback
the
4th
track
(no
signal)
of
CD-1.
*
Apply
an
800Hz
signal
of
0.5Vp-p
from
SG
to
T2
of
TP2
via
a
resistance
of
220kQ.
Adjust
fVR4
to
the
position
shown
in
the
figure.
If
you
do
not
have
a
BPF
or
if
—-3.5d8
cannot
be
achieved.
Pe
Ne
fVR3
Measurin
j
4
Focus
gain
Connect
AC
volt-
|
fVR3
AC
Volt
Meter
adjustment
meter
to
F1
of
TP2
via
the
BPF.
Connect
AC
volt-
meter
to
F2
of
.
TP2
via
the
BPF.
F2
|e
220K
0.5Vp-p
Audio
OSC
T
2
ae
800
Hz
AC
Volt
Meter
¢.
Playback
the
4th
track
(no
signal)
of
CD-1.
*
Apply
an
800Hz
signal
of
0.5Vp-p
from
SG
to
F2
of
TP2
via
a
resistance
of
220kQ.
YN
fVR4
Adjust
fVR4
to
position
shown
in
the
Figure
if
you
do
not
have
a
BPF
or
if
—-2.5dB
cannot
be
achieved.
Using
the
indicated
voltage
at
F1
of
TP2
as
a
reference,
adjust
the
voltage
at
F2
to
—-2.5dB.
¢
Fig.
6-2
Adjustment
location
JP4
JP2
a
7
fVR1
(TO)
F-6557
.
2
RF
G
JP3
-
~_(UP4
@)
{VR2
(FO)
ea
tee
F1
T1
F2
T2

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