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Denon DCD-3300 - Page 19

Denon DCD-3300
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(4)
Refer
to
the
illustration
and
set
the
adjustment
VRs
on
the
servo
pre
P.W.B.
(KU-6050)
of
mechanism
unit
and
servo
main
P.W.B.
(KU-6040)
at
the
following
positions.
Observe
the
marking
of
VR
as
indicated
in
the
illustration,
and
set
them
to
preset
positions.
VR401
(330
k22)
—
12
O'clock
VR402
(47
kQQ)
>
12
O'clock
VR201
(10
kQ)
>
12
O'clock
VR202
(10
kQ)
>
12
O'clock
12
O.clock
9
O'clcok
3
O'clock
Marking
6
O'clock
6)
That
is
all
to
complete
preparations.
Following
is
the
adjustment
order.
PLL
P
Tracking
offset
Focus
gain
Focus
offset
Tracking
gain
Tracking
offset
recheck
AaanPrPwon-
(4)
Adjustment
of
PLL
@)
Preparation
@
Turn
the
power
off.
—
®
Do
not
load
the
adjustment
disc.
@
Check
to
see
that
the
laser
pick-up
is
set
at
inner
circle
of
program
area
(To
move
pick-up,
refer
to
(5)
(2)).
@
Check
to
see
that
the
unit
is
in
service
mode
(Short-circuit
pins
(1)
and
(@),
TP-204
of
servo
main
P.W.B.).
@
Similarly
short-circuit
pins
@)
and
GB)
,
of
TP-203(3P)
of
servo
main
P.W.B.
@
Turn
the
power
on.
@
Confirm
that
“
UO
display.
illuminates
on
the
@
Connection
of
measuring
equipment.
®
Connect
the
frequency
counter
to
the
test
point
PLCK
(pin
“8
of
TP-203)
and
the
ground
of
servo
main
P.W.B.
as
illustration
shows.
Use
10:1
Probe
Pin
@)
of
TP-203
GND
Frequency
Counter
@)
Adjustment
@
Rotate
L-201
with
a
non-magnetic
screwdriver
and
obtain
4.22
MHz
+
20
kHz
PLL
frequency
on
the
frequency
counter
(4.20
MHz
~
4.24
MHz).
@
End
of
adjustment
@
Turn
off
the
power.
@
Remove
the
short
circuit
on
TP-202
of
servo
main
P.W.B:
(Disconnect
short-circuit
con-
nector.)
(5)
Adjustment
of
Tracking
Offset
@
Connection
of
measuring
equipment
®
Connect
the
oscilloscope
to
the
test
point
TP-201
on
the
servo
main
P.W.B.
(KU-6040)
through
the
measuring
filter
as
illustration
shows.
Measuring
Filter
Oscilloscope
r
Pin
@
of
TP-201
|
33k
1
TEO
xX
i
0.001
|
Pin
@
of
TP-201_
|
|
pot
=
Ch-1
Input
%
TEO:
Track
error
out
@)
Use
automatic
search
button
(<
>)
to
move
the
laser
pick-up
close
to
turntable
and
place
it
to
program
area
(recorded
portion)
near
turntable
side
by
the
eye.
Note:
Al!
adjustments
hereafter
are
feasible
when
the
pick-up
position
set
in
the
program
area
however,
recommended
the
pick-up
be
set
at
inner
circle
of
disc
to
avoid
increasing
of
effects
due
to
warp
and
eccentricity
in
the
outer
circle
of
disc.
Turntable
@)
Load
the
adjustment
disc
and
close
the
disc
holder
manually.
@
Turn
on
the
power
and
check
that
the
unit
is
in
service
mode.

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