Denon DCD-425 Service Manual - Page 15

Adjustment, 1094A, Component

Get Denon DCD-425 PDF manuals and user guides View all Denon DCD-425 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 15 highlights

Adjustment Disc: CA-1094 or CA-1094A 1. Focus offset Adjustment 1. Connect an oscilloscope to TP3 (FEO) and TP5 (GND). 2. Insert the disc and set the unit in stop mode. 3.Adjust VR103 so as a DC voltage value on the scope becomes 0 V. DC 0V 0V ±0.05V 2. Tracking offset Adjustment 1. Connect an oscilloscope to TP1 (TEO) and TP5 (GND). 2.Insert the disc and set the unit in play mode. 3.Set VR102 fully counterclockwise. 4.Adjust VR101 and obtain a waveform on the scope becomes A = B. 0V A=B±-0.1V O JK251 JK301 JK252 VR101 (TE.B) VR102 (TE.G) O VR103 (FE.O) / TP1 TP5 TP1: TEO TP2: TEI TP3: FEO TP4: RFO TP5: GND MAIN UNIT (Component side) O O DC0425/335 II= 3. Tracking Gain Adjustment 1. Connect INPUT terminal of Lissajous jig and TP2 (TEI). 2. Connect OUTPUT terminal of Lissajous jig and TP1 (TEO). 3. Connect GND terminal of Lissajous jig and TP5 (GND). 4. Connect OSC INPUT terminal of Lissajous jig and output terminal of generator. 5. Connect GND terminal of Lissajous jig and GND terminal of generator. 6. Connect X, Y terminals of Lissajous jig and X, Y terminals of oscilloscope. 7. Connect GND terminal of Lissajous jig and GND terminal of oscilloscope. 8. Adjust the generator so as to obtain a frequency 1,100 Hz, output 5.0 Vp-p. 9. Load the disc and set the unit in play mode. 10. Adjust VR102 to obtain a waveform on the scope as indicated the following figures. Generator O Oscilloscope 0 -®X OY Range X : 100mV Y : 500mV Main P.W.B. OSC INPUT o TEI INPUT 22k GTNED000GoNuTDpuT 10k Y T 4700P GND 0.022µA 47001: xo 10k Lissajous jig -O TP1(TE0) -O TE2(TEI) O -O TP5(GND) VR102 ■ Tracking Gain Waveform No good (Clockwise gain: Max) Good (Center) No good (Counterclockwise gain: Max) 15

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
DC0425/335 II=
Adjustment
Disc:
CA
-1094
or
CA
-1094A
1.
Focus
offset
Adjustment
1.
Connect
an
oscilloscope
to
TP3
(FEO)
and
TP5
(GND).
2.
Insert
the
disc
and
set
the
unit
in
stop
mode.
3.Adjust
VR103
so
as
a
DC
voltage
value
on
the
scope
becomes
0
V.
0V
±0.05V
DC
0V
2.
Tracking
offset
Adjustment
1.
Connect
an
oscilloscope
to
TP1
(TEO)
and
TP5
(GND).
2.
Insert
the
disc
and
set
the
unit
in
play
mode.
3.Set
VR102
fully
counterclockwise.
4.Adjust
VR101
and
obtain
a
waveform
on
the
scope
becomes
A
=
B.
0V
A=B±
-0.1V
O
JK251
VR101
(TE.B)
VR102
(TE.G)
O
/
TP1
O
JK301
VR103
(FE.O)
TP5
JK252
TP1:
TEO
TP2:
TEI
TP3:
FEO
TP4:
RFO
TP5:
GND
MAIN
UNIT
(Component
side)
O
3.
Tracking
Gain
Adjustment
1.
Connect
INPUT
terminal
of
Lissajous
jig
and
TP2
(TEI).
2.
Connect
OUTPUT
terminal
of
Lissajous
jig
and
TP1
(TEO).
3.
Connect
GND
terminal
of
Lissajous
jig
and
TP5
(GND).
4.
Connect
OSC
INPUT
terminal
of
Lissajous
jig
and
output
terminal
of
generator.
5.
Connect
GND
terminal
of
Lissajous
jig
and
GND
terminal
of
generator.
6.
Connect
X,
Y
terminals
of
Lissajous
jig
and
X,
Y
terminals
of
oscilloscope.
7.
Connect
GND
terminal
of
Lissajous
jig
and
GND
terminal
of
oscilloscope.
8.
Adjust
the
generator
so
as
to
obtain
a
frequency
1,100
Hz,
output
5.0
Vp-p.
9.
Load
the
disc
and
set
the
unit
in
play
mode.
10.
Adjust
VR102
to
obtain
a
waveform
on
the
scope
as
indicated
the
following
figures.
Generator
Oscilloscope
O
0
-®X
OY
Range
X
:
100mV
Y
:
500mV
o
OSC
INPUT
TEI
INPUT
10k
Y
22k
4700P
T
GND
GTNED00
0
GoNuTDpuT
0.022μA
47001:
xo
10k
Lissajous
jig
■
Tracking
Gain
Waveform
No
good
(Clockwise
gain:
Max)
Good
(Center)
Main
P.W.B.
—
O
TP1(TE0)
-O
TE2(TEI)
O
-O
TP5(GND)
VR102
No
good
(Counterclockwise
gain:
Max)
15