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ii
.-
*
2D
ADJUSTMENT
u--vim
–-T%s
TP 1
(RF)
Ov
, . .
..l ...l ..
i .....
1"1"11
I
It'wtw'-"io
v
TP3
(TE)
+
SEARCH
SEARCH *
Other
Adjustment
of
Tracking
Balance
(SVRII)
Set the service mode(CD
tracking
balance
adjusting
mode).
. Enter this
mode
by pressing
[he PLAY/PAUSE
key
during
the service
mode
entry
state.
Pressing
the
PLAY/
Pause
key
in this state
turns
on the tracking
servo
and
causes
playing
to begin.
(See
service
mode)
Connect the oscilloscope to TP3 (TE) and TP4 (GND).
Adjust
SVR11
so that the
TE
(Traverse)
signal
waveform
of
TP3
on the oscilloscope
is vertically
symmetrical
relative
to
OV. Or may
adjust
SVR 11 so
that
the DC voltage
: (Peak
Hold
Level)
- (Bottom
Hold
Level)
of the traverse
signal
is
OV. (See figure right
side)
If it were
not for obtain
waveform
at the right
figure, repeat
item 2-1 - 2-3.
—.
)
. .
L
1.
!.
1.
2 -.
3.
_._.
-1
11]+
500"s
111
.
---r
.,,
,
,
TP1
(RF)
,:, . .
:.'.
.:
t
.+J-I--4-A..-I
-'4-+---i
TP3
(TE)
Ov
4+
SEARCH
.-.
—-----
. . .. .
Focus Gain Confirmation
Connect the storage
scope
to TP2
(F.E
: Focus
Error)
through the Band pass fiiler. (See
BPF
Figure)
Turn on
the power of the unit.
Playback
the test disc.
4. Set the output of AF oscillator
to 400 Hz, 0.5V rms and
connect
to pin 24 (IC1 01) through the resistor : 120k ohms.
5. Confirm
so that the voltage
of the F.E signal
waveform
on
the storage
scope
is 0.5V
p-p,
t 3db by through
BPF.
'If this CONFIRMATION
is imperfect,
become
weak
the mechanical
shock, inferior playability,
and can not playback
the
Disc.
,." ,.
.
...'..
-. .. .
AF (XCII
I ATOR
MAIN
PCB
OSCILLOSCOPE
or
STORAGESCOPE
v
1
BAND PASS FILTER
TP2
I
,.- .-,
I
v
. -----
-------
,
f
$.
Tracking
Gain
Confirmation
1.
Connect
the storage
scope
to TP3 (T.E) through
the Band
pass filter. (See BPF Figure).
2. Turn on the power of the unit.
3. playback the test disc.
4. Set the output of
AF
oscillator
to 400 Hz,
0.5V
rms
and
connect
to pin 14 (ICI 01) through
resistor
47k ohms.
5. Confirm
so that the voltage
of
T.E signal
waveform
on
storage
scope
is 0.5V
p-p, t
3db by through
BPF.
the
.. ....... . ....... . .. .
. .. . . . . . . .
"If this CONFIRMATION
is imperfect, become
weak the mechanical
shock inferior
playability,
and can not playback
the Disc.
AF OSCILLATOR
MAIN
PCB
OSCILLOSCOPE
or STORAGESCG?E
47K
BAND
PASS FILTER
400Hz
0.5V rms
TP3
PIN
14
(TE) -
=
u
-13-
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