Denon DCD-3300 - Page 20

@)
Adjustment
@
Observe
a
waveform
‘by
setting
the
oscillo-
With
a
sufficient
time
interval
in
between,
push
scope
:—
play
button
(»
PLAY)
twice
and
make
the
focus
Input
0.1
V/DIV
(use
10:1
probe)
servo
and
spindle
servo
activated.
(Confirm
that
Sweep
time
1
msec/div
or
2
msec/DIV
of
“9'
on
the
calendar
fails.)
Disc
starts
to
run.
Adjust
VR401
on
the
servo
pre
P.W.B.
(KU-
ah
(Refer
to
(2.(1),
3.(3)
~
(6))
6050)
so
as
to
obtain
the
height
of
waveform
A
@
Terminate
the
input
terminal
of
oscilloscope
to
and
B
becomes
even
as
illustration
shows.
the
ground
and
set
the
horizontal
base
line
to
:
the
center
of oscilloscope
scale.
When
it
is
set,
select
the
input
of
oscilloscope
to
DC
range.
:
(6)
Adjustment
of
Focus
Gain
8)
Connection
of
measuring
equipment
a
With
a
sufficient
interval
of
time
in
between,
push
@
Connect
the
respective
measuring
equipments
play
button
(>
PLAY)
twice
to
activate
tracking
to
the
test
point
TP-201
of
servo
main
P.W.B.
servo
and
slide
servo.
(refer
to
2-(1),
3-(3)
to
(6)
(KU-6040)
as
per
illustration.
Note: Before connecting the oscillator check the
operation of servo (produce sound).
on pages 14,15)
2) Plug in the headphone and make sure the playback
sound is heard prior to the adjustment.
Filter Oscilloscope
Pin @ of TP201
FEO
Pin @ of TP-2010
FELX
Pin @ of TP-201 ©
Set to 1.1 kHz, 1.5Vp-p
Audio
a | Oscillator
*FEO: Focus Error Out
FEI: Focus Error In
Frequency Counter
(4) Adjustment
@ Set the output of audio oscillator to 1.1 kHz, @ Adjust VR-201 and obtain Lissajous figure
1.5 Vp-p (£0.1 V). symmetric to X and Y axes. (Adjust the phase
e@ Prepare and connect two filters as per illustra- of two inputs to 90°.) .
tion.
@ Select oscilloscope input to X-Y modes so to
observe Lissajous waveform. (Select DC range
to observe both X and Y inputs.)
Yaxis Y axis
X axis X axis
Correct waveform Incorrect waveform