Denon DCD-1500 User manual

DENON
_......
SERVICE MANUAL
STEREO CD PLAYER
MODEL DCD- 1500
NIPPON
COLUMBIA
CO.
LTD.

TABLE OF CONTENTS |
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HANDLING CONNECTION AND SAFETY INFORMATION FOR THE KSS-121A
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MAINTENANCE AND ADJUSTMENT PROCEDURE. ... 0.0.0.0... 0 0 cece eee eee ee 13 ~ 20
FUNCTION OF IC TERMINAL. .........-. ara ie ioc epee and eaten fy ste See Rien este ers 21
FUNCTION OF SUB CODE OUTPUT TERMINAL. 00002002000 cee cece ee cee ene enee 22
TROUBLESHOOTING. ....... 000 eee e ccc ee c ee tee cece enn e eee een eens 23 ~ 27
PARTS LIST OF PW. BOARD ..... 0.00.0 c ce ccc ce cece eee e eee eee eeeteeaee 28 ~ 31
PARTS LIST OF EXPLODED VIEW 00.0.0 0c cece cee ce ee sence eee ee eneees 32
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EXPLODED VIEW OF FG-500 MECHANISM UNIT... 0.0.00 c ee cee cece eee eens 34
PW.BOARD ,...... 0.00 cece ccc ce ee cert bee eeedeeneenaeee ee 35 ~ 37
WIRING DIAGRAM «6 2a cnn k cor eo Seat hg Aicoed Pee dada dhanwadetawg we nee 38
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FEATURES
The DCD-1500 compact laser disc player utilizes a unique DENON Double Super Linear Converter which
- prevents deterioration of sound quality in the PCM playback system, assuring accurate reproduction of
sound
recorded
on
compact
laser
discs,
in
the
studio
or
in
live
sound
production
areas.
The
parts
for
this
high
pertormance
disc
player
have
been
selected
with
careful
discrimination,
to
produce
realistic
playback
of the full musical production. : >

eer
SPECIFICATIONS
AubDIo
No. of channels:
Frequency response:
Dynamic range:
Signal-to-noise ratio:
Harmonic distortion:
Separation:
Wow and flutter:
Output voltage:
DISCS
Playing time:
Diameter:
SIGNAL FORMAT
Sampling frequency:
Quantization:
Transmission bit rate:
PICKUP
System:
Lens drive system:
Light source:
Wavelength:
GENERAL CHARACTERISTICS
Power supply:
Power consumption
Dimensions:
Weight:
FUNCTIONS AND DISPLAY
Functions:
Display:
Other functions:
REMOTE CONTROL UNIT
Remote control system:
Power supply:
External dimensions:
Weight:
ACCESSOREIS
2 channels
5 ~ 20,000 +0.3 dB
Above 96 dB
Above 96 d&
0.0025% {1 kHz}
95 dB (1 kHz)
Less
than
the
measuring
timit
(0.001%
W.
peak)
2.0V
Compact discs are used.
60
min/singel
side
(Maximum
79.8
min/single
side)
120 mm
44.1 kHz over sampling
16 bit tinear/channel
4.3218 M bits/sec
Objective tens drive system, laser pickup
Two-dimensional parallel drive
Semiconductor laser
780 nm
50/60 Hz, Voltage is shown on rating labei.
WW
434
(17.1
in)
W x
89
(3.5
in)
H
x
350
(13.8
in}
D
mm
6.0
kg
Direct
selection,
quick
selection,
programmed
selection,
repeat
playback
pause,
skip
monitor,
index
search,
A-B
repeat
Track
number,
index
number,
time,
and
program
Headphone
jack
{variable
level),
Variable
level/fixed
tevel
output
terminal
RC-1500
Infrared pulse system
3
vioc
Two
SUM-4
(standard
size
four)
dry
cell
batteries
60
(2.4
in)
W
x
150
(5.9
in)
H
x
17
(0.7
in)
D.
mm
“
98
g
(Inctudes
batteries)
Connecting pin cord
*
Design
and
specifications
are
subject
to
change
without
notice
in
the
course
of
product
improvement.
VAROITUS:
SUOJAKOTELOA
Ei
SAA
AVATA.
LAITE
SISALTAA
LASER-DIODIN,
JOKA
LAHETTAA
SILMALLE
VAARALLISTA
LASER-SATEILYA,
ADVARSEL:”
USYNLIG
LASERSTRALING
VED
ABNING
NAR
SIKKERHEDSAFBRYDERE
ER
UDE
AF
FUNKTION,
UNDGA
UDSAETTELSE
FOR
STRALING.
“
CLASS
I
LASER
PRODUCT“
Se

-| NAMES. AND FUNCTIONS OF PARTS
eet ee
ae ® 80 oo
Sata ——
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""@ Power Switch (POWER)
Press this switch to turn the power source ON.
‘When the power is turned ON, (QQ) will light up in the
RACK NO section of the display @. if no disc is
loaded at this time, (~~-——) will be displayed after
several seconds.
number of tracks on the disc will be displayed in the
TRACK NO. section of the display, and the total
playback time will be displayed under the TIME section.
The calendar will light up to display the total number
of tracks.
@Q Disc Holder
The disc is loaded into the disc holder for play
The disc holder is opened and closed by pressing the disc
: holder open/close button (A OPEN/CLOSE) @. ~ 2
It can also be closed by Pressing the play button (>
3) Disc Holder Open/Close Button ..
(A OPEN/CLOSE) Se
“eject the:
orward: Press it again to close the holder
If a disc is loaded, the DISC indicator will light, the total_._
@ If the disc holder is closed and a disc has been loaded,
the disc is rotated for several seconds, and then the
machine enters. STOP state. The total number of tracks
on the disc and the total playback time are then
displayed on the digital display @.
(4) Display
@ The display area consists of sections for the track
number, the index, the playback time,-and the calendar.
PAUSE
PLAY
:
Indicator
indicator
sais
cc 3e2f
oma Os
- Thewaninn TE ~
ogc _froc [V2 To T+ NTs [eT]
Paseele Nebel hte
= Oispteys the 11a!
OVER ingicator Dlayback time of
7? fncicator. for recorded tacks, the remaining Wacks
iret (Discs with more 10 be plavea
Program nan 21 tracks} Disiavs the
wpaicalen, Catender remaining playback
time-tor the
current wack

3+ te sete weet
i
{
i
©.
Remote
Control
Photosensitive
Window
©
This
window
receives
the
light
transmitted
from
the
wireless
remote
control
unit;
©
The
RC-1500
wireless
remote
control
unit
should
be
operated
while
it
is.
pointed
in
the
direction
of
the
photosensitive
window,
®
When
the
remote
control
is
operated,
the
remote
contro!
sensor
indicator
lamp
will
tight
in
the
display
area
@.
©
Fast
Reverse
Skip
Button
(
€4
)
©
Press
this
button
to
move
playback
in
fast
reverse,
@
When
the
machine
is
in
play,
sound
will
be
produced
during
the
time
that
the
button
is
being
pressed
and
the
fast
reverse
is
operating.
©
If
the
button
is
pressed
while
the
machine
is
in
the
Pause
state,
the
fast
reverse
will
operate
three
times
faster
than
the
reverse
speed
when
the
machine
is
in
the
play
state.
No
sound
will
be
Produced.
@
Fast
Forward
Skip
Button
(>>)
@
Press
this
button
to
move
playback
in
forward,
e@
When
the
machine
is
in
play,
sound
will
be
produced
during
the
time
that
the
button
is
being
pressed
and
the
fast
forward
is
operating.
©
If
the
button
is
pressed
while
the
machine
is
in
the
pause
state,
the
fast
forward
will
operate
three
times
faster
than
the
fast
forward
speed
when
the
machine
is
in
the
play
state.
No
sound
will
be
produced.
©
Track
Button
(
)
©
Press
this
button
to
move
the
pickup
forward
and
advance
to
the
beginning
of
the
desired
track,
®
If
the
TRACK
button’
is
pressed
during
playback
or
\
Pause,
the
pickup
moves
forward
to
the
beginning
of
the
track
that
corresponds
to.
the
number
of
times
the
button
was
pressed.
7
©
Track
Button
(
A)
‘
@
Press
this
button’
to
move
the
pickup
Babkeward:
to
return
to
the
beginning
of
the
desired
track,
@
If
the
TRACK
button
is
Pressed
during
playback
or
Pause,
the
pickup
moves
back
to
the
beginning
of
the
track
that
Corresponds
to
the
number
of
times
the
button
was
pressed.
@
index
Button
(INDEX)
©
Press
this
button
to
begin
playback
at
an
index
number
»
within
a
track,
.
®
Select
the
desired
index
number
by
using
the
ten-key
“pad.
.®
Program
and
Direct
Button
-
-
(PROGRAM
&
DIRECT)
.
Press
this
button
to
select
the
memory
program
function
direct
track
selection
function,
® +10 Button (+10)
®
Press
this
button
to
select
a
track
number
that
is
larger
than
11.
@
The[*10}button
is
used
in
conjunction
with
the
ten-key
pad
@®.
For
example,
to
select
track
number
15,
press
the
button.
and
then
[5]
on
the
ten-key
pad.
©
Similarly,
to
select
track
number
32,
press
[10]
,
(470!
and then press (2].
® Ten-key Pad
@
These
buttons
are
pressed
for
direct
track
selection
or
to
Program
a
selection
into
memory.
For
example,
to
play
back
the
third
track
using.
the
direct
selection
function,
°
press
03)
on
the
key
pad.
Track
number
3
will
then
start
to
play.
To
play
track
number
12,
press
{410}
and
then
[2].
@
To
use
the
keypad
in
Program
mode,
first
press
the
PROGRAM
&
DIRECT
button
to
enter
the
correct
mode.
® Play Button ( » PLAY)
©
Press
this
button
to
play
a
disc,
@
When
the
PLAY
button
is
pressed,
the
{
>
PLAY!
indicator
fights,
and
the
number
of
the
track
being
Played,
the
index
number,
and
the
elapsed
playback
time
for
that
track
are
displayed.
The
calendar
lights
to
display
the
all
of
the
playback
tracks.
The
displayed
tracks
then
go
out
in
order
as
each
finishes
playing.
®
When
playback
of
the
last
track
has
finished,
the
>
PLAY}
indicator
goes
out,
and
the
machine
enters
Stop
state.
®
It
is
also
possible
to
use
the
PLAY
button
to
close
the
disc
holder
after
a
disc
has
been
inserted.
Playback
then
begins.
®
Pause
Button
( |
PAUSE)
@
Press
this
button
to
stop
the
playback
temporarily.
©
If
the
PAUSE
button
is
pressed
during
playback,
the
play
is
stopped
temporarily,
the
PLAY
lamp
goes
out,
and
the
PAUSE
iamp
lights.
©
To
end
the
pause,
push
the
PLAY
key
®.
@® Stop Button ( » STOP)
©.
Press
this
button
to
stop
the
playback.
;
©
The
rotation
of
the
disc
stops,
and
the
total
number
of
tracks
and
the
total
playback
time
are
read
Out
on
the
TRACK
NO,
and
TIME
sections
of
the
display.
m)
During
programmed
playback,
the
total
number
of
tracks
programmed
in
memory
and
the
total
pro-
grammed
performance
time
are
displayed.
@
A-B
Repeat
Button
(A
—
B)
©
Press
this
button
to
perform
repeated
playback
of
a
desired
section
between
two
specified
points.

@. Repeat Button (REPEAT)
© Press this button to repeat playback.
@ When the REPEAT button is pressed, the [REPEAT]
indicator tights and repeated playback is performed. for
ali of the tacks on the disc. During programmed
playback, all of the tracks programmed into memory are
played repeatedly.
Press the REPEAT button again to cancel the repeat
operation,
@® Call Button (CALL)
© Press this button to verify the track numbers that have
been programmed into memory.
@ Time Mode Button (TIME MODE)
@ This button is used to select the type of information to
be read out under the TIME section of the display.
Either the elapsed playback time of the current track,
the remaining playback time for that track, or the
playback time for the remaining tracks on the disc can
be selected,
Normally the elapsed playback time of the current track
is displayed. }f the button is pressed once, the [SINGLE }
indicator lights and the remaining time left to play on
the track is displayed. If the button is pressed again, the
“SINGLE | indicator goes on, and the [TOTAL]
indicator goes on, and the playback time for the remain-
ing tracks left on the disc is displayed. If the button is
pressed once more, the | TOTAL j indicator goes out
and the display returns to the elapsed playback time for
that track,
{f the button is pressed so that the [TOTAL | indicator
fights during programmed playback, the playback time
for all of the remaining programmed tracks is displayed.
@ Clear Button (CLEAR)
©@ Press this button to correct the programmed contents
of memory.
»
‘@. Timer Button (TIMER)
*@ This button is used in conjunction with an audio timer
to perform timer playback at the specified time.
® Volume adjustment knob
@ This knob is used to adjust the output jevel (volume) of
the headphone jack.
@ Headphone Jack (PHONES) '
© When using headphones, please listen to them at an
appropriate volume.
(Headphones are sold separately.)
@® Output terminal (OUTPUT)
® Connect the output terminal to the input terminal of the
amp.
@ Sub code output terminal
(SUB CODE OUT)
® This output terminal will enable the more effective use
of the compact disc player in the future,

|
NOTE
FOR
HANDLING
|
LASER
PICK-UP
DESCRIPTION
OF
THE
COMPONENTS
CROSS-SECTIONAL
DRAWING
OF
THE
OPTICAL
PICK-UP
+ x-axis + Z-axis
I objective fens
\
objective tens
TRK/FCS coil
°
concave
lens
t base magnet
optical bos actuator cover 8
cylindrical lens
actuator harness
i
NPBS
oie
photodiode
photodiode
PD
PWB
re
fe
ipi
ie
{6-element)
Laser Diode Pwe
POD harness
LD harness
7. Labet
7-1. Serial number
/
¢
}
f
f
N
\
This
denotes
the
serial
number
used
for
quality
control
in
the
manufacturing
plant.
7-2.
Labet
ay
year
. ‘ (last figure)
day month i quality control No.
Oo ay :
10 1 107!
ao oOo a3
For example, 56.5 mA wilt be expressed as 565.
7-3. Position of the labels
serial number

Se
ELECTRICAL PIN CONNECTION
1. PD harness
12345678
JST
Veco A
YEL
1
2
3
4
5
6
7
8
2. Actuator harness
1 Focus 4 2 Tracking 3
9
i
Pal
9
|
|
FCS + : Lens moves toward the disc
TRK + : Lens moves toward the center of the disc
3. LD harness
Pin No. } description
+ reference
monitor
; GND
| laser

FOR
THE
KSS-121A
CG,
4aL
PICK-UP
1. Handling Instructions :
Please
read
the
following
instructions
Carefully
before
handling pick-ups.
1) Handle with care
The
pick-up
KSS-121A
is
assembled
and
precisely
adjusted
using
a
sophisticated
manufacturing
Process
in
our
plant.
Keep
the
pick-up.
protected
from
vibration
and
impact.
Do
not
disassemble
or
attempt
to
re-adjust
it.
Hold
the
optical
base
(aluminum
diecast)
when
handl-
ing
it.
Do
not
touch
the
PD
and
LD
PWB
(Printed
Wiring
Board).
2
Storage
Do
not
store
the
Pick-up
in
dusty,
high-temperature
or
high-humidity
environments.
3
Laser Diode
Protect Your Eyes
Do
not
Jook
at
the
taser
light
beam
through
the
objective
lens
directly
nor
another
lens
or
a
mirror,
The
taser
beam
may
damage
the
human
eye,
since
the
intensity
of
the
focusd
spot
may
reach
1.3%
10"
W/em2
even
if
the
intensity
at
the
objective
lens
is
400
YW
maximum,
Poison
:
The
LO
chip
contains
As
(arsenic),
a
poison.
Aithough
the
poison
is
relatively
weak
and
the
amount
is
small,
avoid
putting
the
chip
in
acid
or
an
alkali
solution,
heating
it
over
200°C
or
Putting
itjinto
your
mouth,
Avoid
surge
current
or
electrostatic
discharge
The
LO
may
be
damaged
if
a
large
current
is
applied
to
it,
even
if
only
a
short
pulse.
For
safe
handling
of
an
LD,
grounding
the
human
body
and
Measuring
equipment
\
is
strongly
recommended.
Make
sure
that
there
is
no
Surge
Current
in
the
LD
driving
circuit.
The
PINs
of
the
LD
are
short-circuited
for
Protection
during
shipment,
To
open
the
short
Circuit,
remove
the
soldering
quickly
with
@
soldering
iron
whose
insulation
resistance
is
larger
than
10
MQ
after
connection
to
a
suitable
“APC
Circuit.
The
temperature
of
the
sildering
iron
should
be
less
than
320°C,
Note:
“APC
(Auto
Power
Contro!)
HANDLING,
CONNECT
ch
AND
SAFETY
INFORMATION
4) Actuator
The
performance
of.
the
actuator
may
be
effected
if
magnetic
material
is
located
nearby,
since
the
actuator
has
a
strong
magnetic
circuit,
Do
not
permit
dust
to
enter
through
the
gap
of
the
cover.
Cleaning the lens:
Lens-cleaning
paper
with
50
:
50
mixed
solvent
of
IPA
(Isopropyl
atcohol}
and
Freon
(freon
113.
CCI
F-CC1F)
is
recommended.
:
2. Connections
1)
How
to
mount
the
pick-up
:
Use
the
reference
plane
as
shown
in
the
assembly
draw-
ing
when
mounting
the
pick-up
in
the
transportation
mechanism.
No
special
adjustment
such:
as
skew
adjust-
ment
or
grating
angle
adjustment
is
required.
The
meta!
bearing
of
Cu-compound
sintered
alloy
is
impregnated
with
oil.
You
do
not
normally
need
to
lubricate
the
bushing.
If
you
need
to
lubricate,
use
Hydrofluid
EP-56
(Mitsubishi
Oil),
2
Harness and connector
Use
the
specified
connector
housings
for
electrical
connections.
Care
should
be
taken
to
see
that
the
con-
nector
of
the
LD
harness
is
clamped
tightly,
since
a
loose
connection
may
cause
a
serious
damage
to
the
LD.
There
may
be
a
deterioration
in
the
eye
pattern
if.a
digital
noise
source
such
as a
microcomputer
is
position-
ed
near
the
PD
harness.
‘
3) Safety regulations
This
pick-up
is
designed
to
meet
general
safety
regula-
tions.
For.
the
pick-up
as
installed
in
a
set
to
be
certified
‘as
meeting
the
safety
regulations
of
a
Particular
country,
however,
application
will
have
to
be
made
to
the
proper
authorities.

)
e
Removal
of
Top
Cover
|
2
Push
three
hooks
on
the
bottom
of
the
Front
Panet
Remove
two
screws
on
the
front
and
tow
screws
on
the
witha
@
screwdriver,
and
draw
the
Panel
frontward
rear
of
Top
Cover
ed
and
detach
the
Top
Cover
by
means
releases
hooks
to
detach
the
Front
Panel
from
the
of
Hifting
it.
chassis. Further, the Front Panet and the P.W.B’s are
linked
with
connectors,
remove
them.
as
necessary.
©
Removal
of
Front
Panel
(Figure
1)
1 Remove three screws 68) and three screws 6) secur-
ing Front Panel. (Figure 1)
Front panet
Wy?
i
i {
Fig, 1
3 To remove the Front Panel entirely from the chassis,
unlink the connectors between the chassis and the
display P.W.B.mounted on the Front Panel. (Figure 2)
ee a Chassis Connector
a
(
Fig. 2
©
Removal
of
Display
P.W.B
from
the
Front
Panel
2
Detach
the
P.W.B.employing
FL
tube,
then
push
the
1
Remove
eight
screws
6)
and
@
—6each
3x
10
mm
5
snap-fit.
in
the
direction’
.arrow
shows
to
remove
CBTS(P);
2
each
3
x
6
mm
CBTS(S)
holding
the
Display
P.W.B.(KU-5770).
(Figure
3)
P.W.B. ma +e
Disptay P.W.Board
FL tube
Snap-fit

)
¢
Removal
of
Panel
Base
(B)
1
Remove
screw
Q)
securing
the
Panel
Base
(B).
2 -Unfasten screw
prop.
Frant Panel
Putt (2 Portions)
<>
Pane! Base (8)
Push (2 portions)
*
Removal
of
Panel
Base
(A)(8)
1
Pull
three
pawls
catching
the
upper
side
of
Front
Panel
inward
and
release.
For
steps
to
detach
the
Panel
Base
A
,
refer
to
the
illustration.
(Figure
5)
Front Panel
Push —p- ~
Pull (3 portions)
i
Panet Base (A}
«
Reassembling
of
Panel
Base
(A)
and
Knob
Frame
1
Attach
the
Panel
Base
(A}
and
the
Knob
Frame
to
the
Front
Panel
as
illustrated.
in
the
Figure.
(Figure
6)
Panel Base(A) :***"
(Knob Framel .
mounting the prop and remove :
3.
Detach
the
Pane!
Base
(B)
by
following
the
steps
as
explained
in
the
Figure..(Figure
4)
— > _ Pull out
Fig. 4
© Removal of Knob Frame Q)
1 Same as to “Removal. of Panet Base {A}", pull two
pawls catching the upper side of Front Panel inward
and release. Then pull out the Knob Frame. (Figure 5)
7 Note: If this pact catches
the rib, lightly stretch
the Front Panel.
Panel Base (A)
(Knob Frame}
Stretch
i
Fig. 5
t
Set-upright
be
Push
C9
>
3
portions
for
Panel
Base
(A)
2 portions tor Knob Frame
@
Touch
Note:
In
this
condition
the
Panel
Base
(A)
will
Not
be
set
upright
ty
"88:
pawl
hitches
part
(@)
Make part touch the inner Fig. 6
.,
Surface
of
Front
Panel
to
set
the
Panel
Base
(A}
upright.

2
After
attached
the
Panef
Base
(A),
puil
it
to
the
arrow
—
direction
as
in
the
Figure
until
it
stops
(approx.
1
mm).
Fotlow
the
same
procedure
to
complete
attaching
the
Knob
Frame,
(Figure
7}
Panet Base (A}
Fig. 7
Pe
Reassembling
of
Panel
Base
(B)
0)
Fasten
with
screw
@
3
x
10
CBTS{P}
1
Using
two
screws
at
the
places
indicated
with
arrow
in
the
Figure
to
mount
the
Panel
Base
(B).
2
“Mounting
hints.
(Figure
9)
Boss
@
Fasten
with
screw
@)
3x
10mm
cersip)
‘
“Fig. 8
Observe optimum siany
Front Panel
i
y
{
_- Panei Base (8)
Panel Base (8)
:
=>
Be
sure
rot
4
td
be
Bke
this
:
oN
2
pa
Boss
Front
Panet
|
Put
boss
into
the
hole
Put
two
tower
pawts
in,
then
upper
ones
=
Neve
Do
not
excessively
slant
the
Fane
Base
(B)
as
this
may
result
in
setting
of
the
Button
onto
the
bottom
of
Front
Fig.
9
Panel.
Be
sure
to
observe
carefully,
¢
Removal
of
Mechanism
Unit
(Refer
to
page
34.)
¢
Removal
of
Mechanism
Unit
Parts
(Refer
to
page
34.}
The
Mechanism
Unit
can
be
removed
after
removing
the
Refer
to
the
exploded
view
of
Mechanism
Unit
and
the
i
Front
Panet,
2,
following
instructions,
replace
chars
slide
motor,
-and
(1)
Remove
screw
6@
on
the
rear
of
loader
and
dis’
spindte
motor.
assemble
the
loader
stopper
@.
(1),
Remove
2
mounting
screws
for
the
rusoa
©
1
7"
(2),
Unfasten
screw
securing
the
leaf
switch
@
on
the
a
detach
the
housing
from
the
mechanism
plate
:
right
hand
side
of
Mechanism
Unit
to
detach.
(2)
Unfasten
two
mounting
screws
G4),
63)
for
the
servo
(3)
Draw
loader
unit
frontward
to
detach,
P.W.B.
and
dismantte
the
P.W.B,
=
(4)
Remove
four
screws
6)
tightening
Mechanism
Unit.
(3)
To
replace
pick-up
,
remove
four.
screws
7)
on
Hold
the
rear
of
the
Unit
and
pull
it
‘out
diagonally
to
-
the
both
sides
of
slide
shaft
42),
and
disassemble
}
rear
to
dismantle.
Pick-up
with
the
‘slide
shaft
from
the
housing
.
Do
Not
over tighten
the
screws
64)
when
remounting.
{4)
To
reptace
slide
motor
(3),
remove
spring
Q).
3-E
ring
6),
and
helica!
gear
(6).
e
(5)
Next,
remove
2
mounting
screws.
@
of
the
slide
Ae
2
motor
@
and
detach
‘the
slide
motor
with
the
worm
gear
“3
.
To
replace
spindle
motor
Q..
unfasten
a
mounting
‘screw
6?)
for
the
turntable
:
“Next,
remove
2
mounting
screws
63
for
the
spindle
_Motor
and
detach
the
spindle
motor
from
the
housing:
‘
In_addition
when
remounting
the
turntable,
:
refer.to
he
“Turntable
Height
Adjustment”

So re an Seemann tn ned oot meen ete ite ee tap a cae
“1, Se
|
ADJUSTMENT
OF
Mv
.iANISM
UNIT
|
® Turntable.Height Adjustment
@®
Attach
the
turntable
to
the
spindle
motor.”
~
+:@),
To
adjust
the
height
in
2
mm,
insert
“A”
part-of
the
++
+)
jig-between
the
upper.
surface
of
the
housing
and
the
lower surface of the turntable.
®
When
it
is
adjusted
to
2
mm,
tighten
the
set
screw.
About the height adjustment jig
As
illustration.
shows,
the
jig
to
be
used
for
the
height
adjustment
is
prepared.
The
part
indicated
“A”
for
turn-
table
height
and
“B”
for
clamper
arm
height
adjustment.
In
order
easier
for
the
adjustment,
place
the
laser
Pick-up
away
from
the
turntable
and
insert
the
jig
between
the
housing
and
the
turntable
before
attempting
the
adjust-
ment,
©
Clamper
Arm
Height
Adjustment
@®
Load
a
disc
onto
the
turntable.
@
To
adjust
the
height
between
the
disc
and
disc
clamper
in
2.5
mm,
insert
“B”
part
of
the
jig
into
the
portion
indicated
in
the
illustration.
@
After
adjusting
it
to
2.5
mm,
fasten
the
clamper
height
adjustment
screw,
MAINTENANCE
AND
ADJUSTMENT
PROCEDURE
For
necessary
operations
to
perform
part
replacement,
Pepairing,
and
adjustment,
it is
feasible
by
using
of
opera-
tion’
buttons
normally
used
for
playing
to
adjust
tracking,
focus,
etc.
of
the
laser
pick-up.
because
of
a
service
soft-
ware
(service
mode)
is
Programed
to
a
microcomputer
employed
in
this
model.
}
Hereafter
the
adjustment.
procedures
for
each
circuit
checking
and
servo
system
adjustment
are
explained
as
the
unit
is
set
to
service
mode
condition
except
for
specified
case,
tting
of
Service
Mode
©
Turn
off
the
power
(do
not
toad
a
disc).
*
Remove
top
cover
for
confirming
of
inside.
¢
Short-circuit
pins
@
and
©.
TP-204
of
signal
“=
processing
P.W.B.
(KU-5760).
It
is
convenient
to
use
a
“connector
like
one
the
illustration
shows.
“Note:
Never
short-circuit
TP-204
after
the
power
turned
Pe
on,
*
-By
turning
on
the
power,
“
(7/7)
blinks
on
the
indica-
**
<
tion
window
showing
service
mode.
°
On:
this
State,
all
buttons’
functions
for
normal
playing
a
are
inoperative
and
the
disc
tray
can
not
be
opened
or
fosed.
: :
rt
WUTLLLET ETH.
LULLILLLLLL LL
Housing
Spindle Motor
lp 7“
Hight
Adjustment
Jig
8
part
\
A pert
Clamper Hight
af Adjustment Screw
/
Dise
.
~
Turntable
.Ptace
to
set
jig
Height : 2.5mm

)
2. NOTES ON OPERATION BUETONS IND 3. CHECKING OF FOCUS, SPINDLE,
SERVICE MODE : TRACKING, AND SLIDE SERVO ,
as * OPERATIONS
{1) Play Button (> PLAY) — ; © Be sure to observe the preceding “Turntable Height
Each
push
of
the
button
to
actuate
the
following
Adjustment”
at
the
time
removed
the
turntable
or
in
servo circuit operation in consecutive order. Pushing case of disc hit the tray.
it four times actuates-all servo operations. Also when repiaced the parts, be sure to do the follow-
@
Push
it
once
:
Actuate
focus
servo
circuit
ing
servo
system
adjustments
prior
to:
these
adjustments.
("1° appears on the calendar.)
@ Push it twice : Actuate spindle servo circuit {1) Turn off the power and. disconnect the jumper to
(“2" appears on the calendar.) pins @ and @ of TP-204. Then turn on the
© Push it three times : Actuate tracking servo circuit power and operate disc halder open-close button
(3° appears on the calendar.) { & OPEN/CLOSE} to load the standard disc.
@ Push it four times : Actuate slide servo circuit Note: When TP-204 is shorted, disc hoider can not
(4
appears
on
the
calendar.)
be
opened
or
closed
even
though
the
disc
holder open/close button is pressed. Displace
the lock arm from the lock point, enables
Joading of disc by drawing the disc hotder
frontward manuaily. In this case, turning on
and off the power is not essential. + (
When focus servo operation is defective, it will not go
to the next step however the button is pressed.
(2) Stop Button ( s STOP}
Pushing the button to cancel all circuit operations.
To check servo circuit again or recheck from the
beginning,
put
it.
(2)
Short-circuit
pins
@
and
@®
of
TP-204
and
turn
on the power. Check to see that” {7/7 ” blinks on
(3) Track Button (Kt PT) the indication window.
in service mode, this button has two functions.
‘D tn stop state (inciude the condition after the power {3}
is turned on):
The pick-up slides.
While pushing " ” side, pick-up moves to disc
center; whie pushing ‘' & ‘ side, it moves to disc
outer circle.
tn the state when play button { » PLAY) is pressed
four times and all servo circuits are activated:
Performs track jump.
There are three types of track jump (1, 10, 100
tracks} and are switchable by pause button (24
PAUSE}.
* Except for the above two conditions, this button
will not function even if it is pressed.
{An example: In such a case when the play buttort~
is pressed three times and the servos are activated
up to tracking. )
Checking of Focus Servo Operation.
Pushing the play button ( » PLAY) starts focus
search. When the disc is loaded, by detecting of a
focusing point of the laser beam on the disc surface
to activate focus servo.
When .the disc is not loaded, repeats focus search
three times and the returns to the former state (the
condition before pushing the button).
When the button is continuously pushed, repeats !
focus search with or without loading of the disc. ,
When the button is released, starts detecting a focus-
ing point within the three times of search operation.
In case of focus servo is properly worked, the
position of object lens of laser pick-up becomes (
approximately the same height as actuator cover.
Confirmation of the proper focus servo operation
can be checked by a “squeak” sound reproduced
when turning the disc clockwise or counterclockwise
with the hand lightly.
This sound derives from the movement of actuator
for focus servo, so checking of this sound namely to 7
confirm proper operation of focus servo. F
Note: Confirming up and down movements of
be object lens enables checking of focus
i as : search operation. Remove the disc ..and
hen activate all:servo circuits, r . detach the disc clamper so as to look object
lens movement more easily, then push play
button ( » PLAY)... The object lens repeats
moving three times up and down then stops.
Through this movement the operation of
actuator. for focus control can be checked, -
cS)
e Pushing the track button {>}. while all servo
circuits are activated makes the tracking servo gain
lowered.
Note that the adjustment of tracking servo explain-
ed later must be ‘performed under the tracking
servo is in high gain. To put it in high gain condi-
tion, turn off the power once and turn on again,
(4). Pause Button ( [] PAUSE)
Switches track jump mode.
tt is always reverted to 1. track jump node whenever
the power is turned on. ee
Each push of the button shifts the mode to 10-track. :
* 100-track, .1- track ston Ttrack-jump “fit
2 10-track jump {7 f°; 100-track. jump
links on the display to show respective mode
nfirmation of track j jump ‘mode can be obt:

(4) Checking of Spindle Servo
After checking the focus servo, Bushs ain. button. oe
{ >» PLAY) again, The disc starts to. run.
With this revolution of disc, the servo operation can
be confirmed. ; ;
{Confirm that 2" indicates on the calendar.)
Note: If the disc does not run due to spindie servo
malfunction or runs fast, the following
“Checking of Tracking Servo” will be im-
possible,
{5) Checking of Tracking Servo
Push play button (> PLAY} again.
When tracking servo is properly operated, a “Sizzle”
sound from ‘the’ operation of tracking actuator of
laser pick-up will be produced.
(Confirm that 3” indicates on the calendar.)
Note: Same as previous column, if it is not property
operated the following checking..will be
impossible,
{6} Checking of Stide Servo
Note: Before checking, prepare and insert a head-
phone into the headphone jack with a
volume adjusted to adequate level.
Push play button ( » PLAY) again.
When slide servo is properly operated, the sound
will be heard through the headphone.
This sound not always be heard normally, for many
instances it will be heard as if it is muted.
(Confirm that 4" indicates on the calendar.)
4, ADJUSTMENT
(4) Before Adjustment. wes
Adjustment’ .order is, first to adjust’ *Lurritable height,
etc. at the time complete assembling, secondly ‘to
adjust electrical adjustments for laser pick-up system
and spindle motor system to complete. :
The adjustment of the super-linear converter employed
in this unit aiming to reduce a distortion at the
time of O/A conversion is unnecessary except for
special occasion.
(2) Measuring Equipments-and Implements for Adjustment
@ Dual-mode oscilloscope. ; .
@® Specified disc for adjustment
“@ Measuring filter
Note: if there is no sound, ihe taser pick-up may
4 . ..be set at disc’s lead-in or lead-out position.
° For this case, move the laser pick-up to the
program are referring to the column 4.(5) Q).
7) Checking of Playback Sound
@ Connect the line-out of this unit to an appro
priate amplifier so that the playback sound can
be checked.
Push either side of track button ( 4.» ).
In this state tracking servo becomes low gain and
the unit becomes normal playing condition.
(8) Checking of General Functions
Turn off the power and disconnect the jumper to
- pins @)} and @) of TP-204.
Turn on the power and check aif playing controls
for ‘proper functions.
Note: Because of a timing of the microcomputer
employed in the unit, occasionally it does
not accept a command from the button.
in this case do not judge it for defective,
repeat the same check for several times.
33k
IN s 0 ouT
| 0014F
@ Audio frequency oscillator
10 kHz, 3 Vp-p output maximum
© Frequency counter
Count up to 5 MHz minimum
© Connector with wires for signal pick-up
6p. 1 each
3p 2 ach
@ Headphones ~
Checking of ptayback ‘sound

(3)
Preparation
)
Signal
Processing
PWB
Location
of
Terminal
for
Adjustment
;
[Q{a}
GNO GND
eo
@®
LY
:
oO
PLL
x
L301
2
[
Ik
1P207---19
(0)
~~
t
i]
3
&
3
[]tP204
ms
oa
?
23
"
a8
TP2OXPLCK)
:
‘
«
9)
te2o6i.RcK)
:
HO6SA05vOP
a
_&
R201
;
i
(
ao
&
(ye
OF
‘(he
ce
je
2
fgg
Os
*\ TP2OB(GFS)
Ba)
GND
NOTE
f)
(0)
P.W.8
Improved
NO.O,
(1)
PW.B
Improved
NO.1,
(2)
P.W.8
Improved
NO.2
D
Be
sure
that
the
power
is
of
f
state,
Short-circuit
pins
@
and
®.
TP-204
of
signal
‘Processing
P.W.B.
(KU-5760)
and
set
the
unit
to
service. mode.
@
Remove
disc
clamper
by
means
of
drawing
the
disc
holder
of
mechanism
unit
frontward.
Power
Transformer,
.
{Manually
move
the
lock
arm
fitted
with
side
of
the
VRI04_VA103;
vAo2
vRio}
disc
holder,
release
the
lock
of
tray,
and
draw
the
<=
=
=>
disc
holder
frontward.)
2
Ux]
tx)
‘€3
we:
Af
x)
Connect
the
wires
of
signal
pick-up
connectors
to.
-
Le
TP-102
~-
TP-101
(6P)
and
TP-102
(3P).
TP-101
@
Mount
the
disc
clamper
removed
in
step
2.
Leave
°
Disc
Clamper
:
“2
the
disc
holder
drawn
frontward.
®
Set
the
adjustment
VRs
on
the
servo
P.W.B.
(KU-
.
.
5720)
of
mechanism
unit
at
the
following
positions.
Observe
“the
marking
of
VR
and
set
them
to.
preset
Positions.
ee,
ok
VR101
(330°kQ)
"+
12
O'clock
VR102
(47'KQ)
">
12
O'clock
VR103
(10.
KO)
>
11
O'clock
7
“>
10
O'clock
That
is
all
to
complete
Preparations.
Following
is
9
the
adjustment
order.
Marking

(4) Adjustment of PLL
® Preparation
% TEO! Track error out ~
® Turn the power off,
©
Do
not
toad
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
@)
and
G),
TP-204
of
signal
processing
P.W.B.).
©
Short-circuit
pins
@
and
@,.
or
@
and
©.
TP-202
(3P)
of
signal
processing
P.W.B.
{Ku-
5760).
*
Short-circuit
pins
@)
and
G).,
TP-207
(3P)
of
signal
processing
P.W.B,
:
© Turn the power on,
©
Confirm
that
uo
”
blinks
on
the
indication
window,
Connection
of
measuring
equipment,
RNa
TP-203
o——jpo+
1P-20g 0S LO
Frquency Counter
*
Connect
positive
@
side
of
the
frequency
counter
to
TP-203
and
Negative
©
side
to
TP-208.
\
Adjustment
©
Rotate
L-301
with
a
non-magnetic
screwdriver
and
obtain
4.32
MHz
+
20
KHz
PLL
frequency
‘on
the
frequency
counter
(4.30
MHz
~
4.34
MHz).
End
of
adjustment
.
©
Turn
off
the
power,
{
©
Remove
the
short
circuit
at
TP-207
(remove
shorting connector).
Note:
Do
not
remove
the
short
circuit
at
TP-202
as
this
is
required
in
next
servo
system
adjustment,
{5)
Adjustment
of
Tracking
Offset
Connection
of
measuring
equipment
oN
:
“
="
Oscitloscope
Measuring Fitter
@®
Use
track
button
{
fy
bt)
to
move
the
faser
pick-
up
close
to
turntable
and’
place
it
to
program
area
{recorded
portion)
near
turntable
side
by
the
eye.
Note:
All
adjustments
hereafter
require
the
pick:
UP
position
set
in
the
Program
area
{recorded
portion)
however,
recommend
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,
©
Check
to
see
that
the
Power
is.
turned
on
and
the
unit
is
in
service
mode,
Adjustment
With
a
sufficient
time
interval
in
between,
push
play
button
(
»
PLAY)
twice
and
make
the
focus
servo
and
spindle
servo
activated.
Disc
starts
to
run
and
confirm
that
“2”
indicates
on
the
calen-
der
(Refer
to
2.(1)
and
3.
(3)~(6)).
©
Terminate
the
input
terminal
of
oscilloscope
to
the
ground
and
set
the
horizontal
base
line
to
the
center
of
oscilloscope
scale.
When
it
is
set,
select
the
input
of
oscilloscope
to
OC
range.
©
Observe
a
waveform
by
setting
the
oscitto-
scope: —
Input
0.1
V
(use
10:1
probe}
‘
Sweep
time
1
msec.
or
2
msec.
Adjust
VR101.so
as
to
obtain
the
height
of
waveform
A
and
B
becomes
even
as
shown
in
illustration.

{6) Adjustment of Focus Gain
With a sufficient interval of time in between, push
play button ( > PLAY) twice. to activate tracking
servo and spindle servo.
@ Plug in the headphone and make sure the playback
sound is heard prior to the adjustment.
@® Connect of measuring equipment ..
Connect the measuring equipments as per illustra-
tion.
Note: Before connecting the oscillator check the
x Operation of servo (produce sound),
Oscilloscope -
Pin) of TP-101 ©
FEOX
ay
Pin @ ot TP-101 O
FEIN
Pin © of TP-101 ©
Set to 1.1 kHz, 1.5Vp-p
Audio -
| a | Oscillator
“FEO: Focus Error Out
FEI: Focus Error In
Frequency Counter
@ Adjustment
‘@ Set the output of audio oscillator to 1.1 kHz,
1.5 Vp-p (40.1 V}.
Prepare and connect two filters as per illustra-
® Adjust VR-103 and obtain Lissajous figure
symmetirc to X and Y axes. (Adjust the phase
of two inputs to 90°.)
i Yaxis *.- Y axis ae
Correct figure

(7) Adjustment of Focus Offset ae %
x
® Adjustment
:
®:
Adjust
it
in
the
same-condition
as_to:
jc
teiss
gain
except the measuring equipment connections.
@ Connection of. measuring equipment
Note:
.
Audio
oscillator.should
be
connected
dur-
-
ing
the
servo
operation.
Oscilloscope
; HE
Pin @)-and of TP-102
TP-102
GNO
‘FEN,
Pin @ of TP-101
Pin © ot TP-101
Frequency Counter
oe
NATE” or “CHOPPER” and set it to 50 mV/
DIV or 20 mV/DIV {use 10:1 probe).
. Observe. by setting the sweep: time to 0.2 or
0.5 ps range.
AN vii
Be,
Audio Oscillator
Set to 1.1 kHz, 3Vp-p
@
A
waveform
to
observe
in
this
time
called
@
Set
the
output
of
audio
oscillator
to
1.1
kHz,
“Eye
Pattern”.
3.0
Vp-p
(£0.1
V).
®
Adjust
VR-102
for
a
minimum
jitter
amount.
©
Select
oscilloscope
input
mode
at
“ALTER-
AURAKARS te

(8)
Adjustment
of
Tracking
Gain
‘
@®
Adjustment
ae
|
@
Adjust
it
in
the
same
condition
as
to
focus
gain
s
®
Set
the
output
of
audio
oscillator
to
2.25
kHz
|
except
the
measuring
equipment
connections.
+120
Hz
2
Vp-p
+0.1
V.
|
@
Aduio
oscillator
should
be
connected
while
the
®
Connect
two
filters
as
per
illustration.
servo
is
in
Operation.
©
Select
oscilloscope
input
so
to
observe
Lissajous
if
the
connection
is
made
before
servo
operation,
waveform.
(Select
DC
range
both
X
and
Y
causing
mis-operation.
inputs.)
{if
the
connection
is
made
in
failure,
disconnect
©
Adjust
VR-104
and
obtain
Lissajous
waveform
Oscillator,
push
stop
button
({
©
STOP)
to
stop
symmetric
to
X
and
Y
axes.
The
waveform
is
all
operations,
and
follow
the
steps
from
the
the
same
as
focus
gain
adjustment.
i
beginning.
@
Connection
of
measuring
equipment.
Oscibator
:
TEO#
uy
Pin
@
of
TP-101
CH-1 CH-2
TEM
Pin (6) of TP-101 ©
GND
Pin © of TP-1010
*B TEO: Track Error Our
TE1: Track Error in
Audio Osciltator
| es Set to 2.25 kHz, 2Vp-p
Frequency
Counter
£
{9) Checking of Tracking Offset
@
Check
the
adjustment
performed
in
the
previous
©
Observe
a
waveform
and
check
that
the
height
:
column
(5).
oat
of
upper
and
lower
waveform
are
even.
)
*®
Push
Stop
button
(=
STOP)
to
stop
disc
(Reference
value:
Difference
of
height
between
:
: .
two
is
5%
or
less.)
icient
interval
of
time
in
between,
—
.
¢
If
the
difference
is
beyond
the
value,
adjust
push
Play.
button
(>
PLAY)
twice
and
check
VR-101.
ane
a
@
That
is
all
to
complete
aapistnvents
©
Remove
the
signal
pick-up
connector
with
wires
a)
from
TP-101,
102
on
the
mechanism
unit
ae
_
P.W.B.
(KU-5720).
(It
is
necessary
to
pull
out
the
disc
holder.
and
remove
the
disc
clamper.
-Refer
to
column
(3),}