Sony MICROFILM CDP-502ES User manual

SPECIFICATIONS
COMPACT DISC PLAYER
System Compact disc digital audio system
Disc Compact disc
Laser Semiconductor laser (A = 780 nm)
Laser. output
Spindle speed
Scan velocity
Error correction
Max.0.6 mW *
*This output is the value measured at a
distance of about 1.6 mm from the objective
lens surface on the Optical Pick-up Block.
200 r.p.m. to 500 r.p.m. (CLV)
1.2 — 1.4 misec.
Sony Super Strategy Cross Interleave
‘Reed Solomon Code
Number of channels 2
D-A conversion
16-bit linear
Frequency response 2 — 20,000 Hz +0.5 dB
Harmonic distortion
Dynamic range
Channel separation
Wow and flutter
Outputs
Less than 0.0025% (1 KHz)
More than 96 dB
More than 95 dB
Below measurable limit
Line outputs
FIXED (phono jacks)
Output level 2 V rms (at MSB)
Load. impedance over 10 kilohms
VARIABLE (phono jacks)
Disc
Track pitch
Sampling frequency
Quantization
Modulation system
Transfer rate
General
Power requirements
Power consumption
Dimensions
Weight
CDP-620ES:
US Model
Canadian Model
CDP-502ES:
AEP Model
UK Model
E Model
1.6 ym
44.1 kHz
16 bit linear quantizing/channel
EFM
2.03 Mbit/sec. (before modulation)
CDP-502ES
AEP. Model: 220 V ac
UK Model: 240 V ac
E Model: 110,120, 220 or 240 V ac adjustable
50/60 Hz
CDP-620ES
US, Canadian Model: 120 V ac, 60 Hz
16W
Approx. 430 x 80 x 335 mm (w/hid)
(17 x 34/4 x 13%/4 inches)
including projecting parts and controls
Approx. 8.5 kg (18 Ibs 12 02), net
ATTENTION AU COMPOSANT AYANT RAPFORT
A LA SECURITE!
Max. output level 2 V rms (at MSB)
Load impedance over 50 kilohms
Headphones (stereo phone jack)
28 mW at 32 ohms
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY SHADING AND MARK
A ON THE SCHEMATIC DIAGRAMS AND IN THE
PARTS LIST ARE CRITICAL TO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY PARTS
WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS
MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
MICROFILM |
LES COMPOSANTS IDENTIFIES PAR UNE TRAME ET
UNE MARQUE A SUR LES DIAGRAMMES = SCHE-
MATIQUES ET LA LISTE DES PIECES SONT CRITIQUES
POUR LA SECURITE DE FONCTIONNEMENT. NE REM-
PLACER CES COMPOSANTS QUE PAR DES PIECES .
SONY DONT LES NUMEROS SONT DONNES DANS CE
MANUEL OU DANS LES SUPPLEMENTS PUBLIES PAR
SONY. ;
COMPACT DISK PLAYER
SONY.

CDP-502ES/6205S |
PROTECTION
OF
EYES
FROM
LASER
BEAM
DURING
SERVICING
This
set
employs
a
laser.
Therefore,
be
sure
to
fol-
low
carefully
the
instructions
below
when
servicing.
WARNING !!
WHEN
SERVICING,
DO
NOT
APPROACH
THE
LASER
EXIT
WITH
THE EYE
TOO
CLOSELY.
IN
CASE
IT
IS
NECESSARY
TO
CONFIRM
LASER
BEAM
EMISSION,
BE
SURE
TO
OBSERVE
FROM
A
DISTANCE
OF
MORE
THAN
30cm
FROM
THE
SURFACE
OF
THE
OBJECTIVE
LENS
ON
THE
OPTICAL
PICK-UP
BLOCK.
LASER
WARNING
LABELS
The labels shown below are affixed.
1. Protective Housing Label
DHHS
Non-Interlocked
Protective
Housing
Label
(US, Canadian model)
DANGER
INVISIBLE LASER
RADIATION WHEN
OPEN.
AVOIO DIRECT
EXPOSURE 10
BEAM.4-908-401-01
2. Interlock defeatable Label
(US, Canadian model)
DANGER
INVISIBLE LASER RADIATION
WHEN OPEN AND INTERLOCK
DEFEATED. AVOID. DIRECT
EXPOSURE TO BEAM.
4-908-402-01
sete
e US, Canadian model
Non-Interlocked
Protective Housing
Label
DANGER
INVISIBLE LASER
RACIATION WHEN
Interlock defeatable
Label
OIRECT
EXPOSURE TO
BEAM.4-208-401-01
DANGER
INVISIBLE LASER RADIATION
WHEN OPEN ANDO INTERLOCK
DEFEATED. AVOID DIRECT
EXPOSURE TO BEAM.
4-908-402-01
_~\
\
1.
Laser
Diode
Properties
f
Material: GaAlAs
Wavelength: 780 nm
Emission Duration: continuous
Laser Output: max. 0.6 mW*
*
This
output
is
the
value
measured
at
a
distance
of
about
1.6
mm
from
the
objective
lens
surface
on
the
Optical
Pick-up
Block.
®@ Classification: Class IIb
.
During
service,
do
not
take
the
Optical
Pick-up
Block
apart,
and
do
not
adjust
the
APC
circuit.
If
there
is
a
breakdown
in
the
APC
circuit
(inclu-
ding
laser
diode),
replace
the
entire
Optical
Pick-
up
Block
(including
APC
board).
2.
Aperture
Label.
....,
(AEP,
UK,
E
model)
AVOID EXPOSURE
INVISIBLE LASER
RADIATION IS EMITTED
FROM THIS APERTURE.
4-908-404-01
@
See
figure
on
next
page
for
location
of
label.
3. Caution Label (AEP, UK,E model)
CAUTION
ANO. !INTERLOCKS DEFEATED.
ADVARSEL :
+ INVISIBLE LASER RADIATION WHEN OPEN
AVOID EXPOSURE TO BEAM.
USYNLIG LASEASTRALING VED ABNING
NAR SIKKERHEOSAFBRYOERE ER UDE AF FUNKTION UNDGA
UDSATTELSE FOR STRALING.
@ AEP, UK, E model
Caution Label
a
\
SS Aperture Label

oe a
_ CDP-502ES/620ES
BESKYTTELSE
AF
OJNE
MOD
LASERSTRALING
UNDER
SERVICE
I dette apparat
anvendes
nedenstaende instruktioner naje falges under service.
laserlys.
Derfor
Folg iavrigt instruktionerne i servicemanualen.
ADVARSEL!!
Under service ma @jnene ikke komme ner objektiv-linsen
pa den optiske pick-up enhed. | tilfeelde af at det er
ngdvendigt at kontrollere udsendelsen af laserlys, skal
det ske i en afstand af mere end 30cm fra den optiske
pick-up.
1. Data for Laser Diode
@ Materiale: GaAlAs
@ Bolgelengde: 780 nm
@ Udstraling: Kontinuerlig
@ Laser Output: max. 0.6 mW*
* malt i 1.6 mm afstand fra overfladen af objektiv-
linsen pa den optiske pick-up enhsd.
Klassifikation: Svarende til klasse IIb
. Adskil aldrig den optiske pick-up enhed under service,
og juster ikke APC kredsloabet (Automatic Power
Control).: Hvis APC kredslobet (incl. laser-dioden)
bryder ned, skal hele den optiske pick-up enhed (incl.
APC printkortet) udskiftes.
LASER ADVARSEL MAERKNING (AEP model)
Folgende mzrkning findes indvendig i apparatet:
1. Advarsel Meerkning
CAUTION — = invisiBLe LASER RAOLATION WHEN OPEN
AND INTERLOCKS DEFEATED.
AVOID EXPOSURE TO BEAM.
ee
ADVARSEL *< usyniiG LASERSTRALING VED ABNING
NAR SIKKERHEDSAFBRYDERE ER UDE AF FUNKTION UNDGA
UOSATTELSE FOR STRALING.
@ AEP, UK model
Aperture Label
4 685 843 02
2. Aperture Label
AVOID EXPOSURE
INVISIBLE LASER
RADIATION IS EMITTED
FROM THIS APERTURE.
4-908-404-01
Aadvarsel Mzerkning

CDP-502ES/620ES |
SAFETY
CHECK-OUT
(US
Model)
‘After
correcting
the
original
service
problem,
perform
the
following
safety
check
before
releasing
the
set
to
the
customer:
Check the antenna terminals, metal trim, “metallized”
knobs, screws, and all other exposed metal parts for
AC leakage. Check leakage as described below.
LEAKAGE TEST
The AC leakage from any exposed metal part to
earth
ground
and
from
all
exposed
metal
parts
to
any
exposed
metal
part
having
a
return
to
chassis,
must
not
exceed
0.5mA
(500
microampers).
Leakage
current
can
be
measured
by
any
one
of
three
methods.
1.
A
commercial
leakage
tester,
such
as
the
Simpson
229
or
RCA
WT-540A.
Follow
the
manufacturers’
instructions
to
use
these
instru-
ments.
2.
<A
battery-operated
AC
milliammeter.
The
Data
Precision
245
digital
mvuitimeter
is
suitable
for
this
job.
3.
Measuring
the
voltage
drop
across
a
resistor
by
means
of
a
VOM
or
battery-operated
AC
volt-
meter.
The
“limit”
indication
is
0.75
V,
so
analog
meters
must
have
an
accurate
low-
voltage
scale.
The
Simpson
250
and
Sanwa
SH-63Trd
are
examples
of
a
passive
VOM
that
is
suitable.
Nearly
all
battery
operated
digital
multimeters
that
have
a
2V
AC
range
are
suitable.
(See
Fig.
A)
To Exposed Metal
Parts on Set
AC
voltmeter
ia (0.75 V)
= Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.
FEATURES
With
the
CDP-502ES,
flat
frequency
response
(2
-
20,000
Hz),
low
wow
and
flutter
(lower
than
the
measurable
limit),
wide
dynamic
range
(more
than
96
dB),
minima!
distortion
(0.0025
%)
and
high
channel
separation
(more
than
95
dB)
are
achieved.
Quick operation
@Feather-touch
function
keys
for
direct
mode
change.
e@Linear
motor
for
quick
selection
search.
Multi-functional
eA
variety
of
playing
modes:
In
the
PROGRAM
mode
the
desired
selections
can
be
played
back
in
any
desired
se-
quence.
In
the
CONTINUE
mode
playback
is
continuous
from
the
desired
selection
to
the
end
of
the
disc.
In
the
SINGLE
mode
only
one
selection
is
played
back.
eThe
shuffle-play
function
plays
selections
back
in
ran-
dom
order.
e@The
AMS
(Automatic
Music
Sensor)
for
quick
selection
location
eThe
index
function
allows
you
to
locate
quickly
the
part
you
want.
eThe
repeat
function
allows.you
to
repeat
play
con-
tinuous
in
any
mode.
eThe
auto
delay
function
allows
you
to
delay
the
playback
of
the
first
selection
2
seconds.
@An
RM-D502
remote
commander
supplied.
eLarge
and
easy-to-read
music
calender
display
shows
the
selection
numbers
on
the
disc
and
the
time
counter
shows
the
elapsed
or
remaining
playing
time.

he
CDP-502ES/620ES
— CAUTION FOR ELECTROSTATIC BREAKDOWN —
NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK (BU-1)
The laser diode in the optical pick-up block may 1. Place a conductive sheet on the workbench.
suffer electrostatic breakdown because of the poten- (The black sheet used as repair parts wrapping).
tial difference generated by the charged electrostatic 4. Place the set on the conductive sheet so that the
load, etc. on clothing and the human body.
The printed matter below is included in the repair
parts. During repair, use the procedure in the printed
chassis touches the sheet. (This makes it the same
potential as the conductive sheet).
3. Place your hands on the conductive sheet. (This
matter.
The following method is an example for reference makes them the same potential as the sheet).
purposes: 4. Remove the optical pick-up block.
5. Perfrom work on top of the conductive sheet. Be
careful that clothing does not touch the optical
pick-up block.
Printed Matter Included in the Repair Parts
When opening or repairing a BU-1, the procedure for grounding as follows is required to prevent damage caused
by static electricity.
1. Grounding for the human body.
Be sure to put on a wrist-strap for grounding (with impedance lower than 10°) whose other end is grounded
The strap works to drain away the static electricity built-up on the human body.
. Grounding for the work table.
Be sure to lay on the table a cunductive sheet (with impedance lower than 10°) such as sheet of copper
which is grounded.
. As static electricity built-up on clothes is not drained away, be careful not to let your clothes touch the BU-1.
@) Wrist-strap
for grounding
transit protective cap
The unit
BU-1
@) Conductive sheet

CDP-502ES /620ES
NOTE ON REPAIR
@
Are
reset
signals
applied
to
each
IC?
During
power
ON,
a
“L”’
signal
is
made
momenta-
:
rily
at
R999
and
C995
and
applied
to
the
RESET
pin
of
each
IC.
During
power
OFF,
a
“L”
signal
is
made
by
Q991.
e@
Are
clock
signals
applied
to
each
IC?
The
microcomputer
clocks
except
for
remote
con-
trol
are
made
at
IC352
(67.7376
MHz)
and
then
divided
into
(4)(16.9344
MHz)
and
output
from
pin
(3).
The clock signals from pin 3 are wave shaped at
1C351
and
applied
to
1C603
pin
(1).
Here
they
are
further
divided
into
two
and
8.4672
MHz
clocks
are
applied
to
IC601.
The
other
micro-
computers
use
the
4.2336
MHz
signal
(divided
at [C603 and output from pin ).
e@ Are the optical block and servo operating?
If
power
is
turned
on
when
a
disc
is
not
inserted,
the
laser
goes
up
and
down
three
times.
Correct
optical
block
and
servo
system
operation
can
be
checked
by
confirming
by
eye
that
the
laser
is
lit
up at this time.
NOTES
ON
LASER
DIODE
EMISSION
CHECK
The
laser
beam
on
this
model
is
concentrated
so
as
to
be
focused
on
the
disc
reflective
surface
by
the
objective
lens
in
the
optical
pick-up
block.
There-
_ fore, when checking the laser diode emission, observe,
from more than 30 cm away from the objective lens.
2} Confirm that laser beam is spread,
(3) Up and down motion of the
objective lens, (3 times)
optical pick-up
block
© Hold down optical
pick-up by a finger.

CDP-502ES/620ES ©
CDP-502ES/620ES
LOCATION AND FUNCTION OF CONTROLS
Front panel
Photo: CDP-502ES
@ Disc compartment
The disc compartment opens when the OPEN/CLOSE
key @ is pressed. The disc compartment can be closed
by pressing the front of it lightly, by pressing the
OPEN/CLOSE key again or by pressing the B® PLAY key
6.
@ OPENICLOSE key
The disc compartment opens when this key is pressed,
and closes when it is pressed again.
© REMOTE SENSOR and indicator
The signal transmitted by the supplied RM-D502 remote
commander is received here. The indicator blinks to in-
dicate that a function key on the remote commander has
been pressed.
@ Direct selection keys
The keys numbered ({1] - [20], [+ 10] and [0] are used to
select the desired selection directly by number. Except
during the PROGRAM mode (page 15), the selection will
begin to play when the numbered key is pressed.
© > PLAY key
Press to start disc play. The ® indicator will be lit up
during play.
@ i PAUSE key
Press to pause during play. The §4# indicator will light up.
To release the pause mode, press this key again. The #4
indicator will go off and play will resume.
@ AMS (Automatic Music Sensor) keys
The desired selection can be located by pressing one of
these keys during play or during pause. -
kg: Press once to go back to the beginning of the
selection being played. To go back to the previous
selection, press two times, and so on.
bp: Press once to skip ahead to the beginning of the
next selection. Press twice to skip to the following
selection, and so on.
© INDEX keys
Press one of these keys to search for a particular index
number (signals prerecorded on the disc, indicating divi-
sions within a selection), to start play from the desired
point within. a selection. The index numbers are
displayed in the display window.
«_: Press once to return to the previous index number.
—: Press once to skip to the next index number.
If the key is pressed during playback of a disc on which
no index numbers have been recorded, play will start
from the beginning of the current selection.
© CHECK key, CLEAR key
CHECK: This key is for checking: the order of the
programmed selections.
CLEAR: In order to clear the programmed selections
one by one, first display the selection number with
the CHECK key, then press this key. Also, press this
key to clear [+ 10]if it is pressed by mistake.
@ PLAY MODE keys
CONTINUE: Press this key to play continuously from
the first (or desired) to last selection, in order from
the lowest number.
SINGLE: Press to play one selection only.
PROGRAM: Press to program the desired selections in
the desired order continuously.
@ STOP (RESET) key
When this key is pressed during play, play will stop and
the player will stand by, waiting for your instructions. All
selection numbers are displayed in the display window
and the TRACK and the INDEX indicators show 7.
@ Manual search keys
These keys are used to search fora particular point. You
can monitor the sound while going in fast forward or fast
reverse during search: :
<4<q: Keep pressed to go backwards at high speed.
bp : Keep pressed to go forward at high speed.
—7J—
Photo: CDP-502ES
® POWER switch
@® TIMER switch
Using an optional timer, the player can be set to start
playing automatically at a particular time.
® HEADPHONES jack (stereo phone jack)
Accepts any stereo headphones equipped with a stereo
phone plug.
@® REPEAT key
Press to repeat play. There are five types of repeat play:
one selection, all selections, A — B , program and shuf-
fle repeat.
@® TIME (elapsed or remaining time) key
When this key is pressed during play, the time remaining
for this selection or the time remaining on the disc is
displayed.
® AUTO DELAY key
When this key is pressed, two seconds of blank space
are inserted before play of the first selection begins.
This function is cancelled by pressing the key again.
@® SHUFFLE PLAY key
Selections are shuffled and played in a random order
when this key is pressed. When all of the selections on
the disc have been played once, the shuffle play is
cancelled.
Display window

‘CDP-502ES/620ES CDP-502ES/620ES
@ LINE OUT/PHONE LEVEL control
This control adjusts the output levels for both the LINE
OUT VARIABLE jacks @ on the rear panel and the HEAD-
PHONES jack @® on the front panel. Output level in-
creases when it is turned to MAX. This control also turns
automatically when operated using the supplied remote
commander RM-D502.
@ DISC indicator
This indicator lights up when the disc compartment is
moving, when the disc compartment has closed with a
disc in place and during disc playing.
You can tell whether a disc is inserted or not even when
the disc compartment is closed by checking this in-
dicator.
@ TRACK indicator
When the disc is inserted using the OPEN/CLOSE key @
or by pressing on the front of the disc compartment @,
the number of selections on the disc is displayed for
several seconds. When play begins, the number of the
selection being played is displayed. When the ® key
@ is pressed continuously and you go past the end of
the last selection, 77is displayed.
If the <q key ® is kept pressed and you go past the
beginning of the first selection, _~is displayed.
® Time counter
When the disc is inserted and the disc compartment °
closed, the total time of all the selections on the disc is
displayed for several seconds. (When the m® PLAY key @
is used, this display does not appear.) When play begins,
the elapsed time the selection has been playing is
displayed.
When the TIME key ® is pressed, the time remaining un-
till the selection ends is displayed after a minus ‘‘—”
symbol. When this key is pressed again, the play time re-
maining is displayed after a minus symbol. The display
varies depending on the setting of the PLAY MODE key
@ and SHUFFLE PLAY key @®.
@ PGM indicator
This
indicator
lights
up
when
the
PLAY
MODE
PRO.
GRAM
key
@
is
pressed
in
stop
mode,
then
goes
out
after
the
disc
has
begun
to’play.
|
The
indicator
also
lights
up
when
the
programmed
selections
are
being
checked
even
during
play.
® INDEX indicator
This
displays
the
index
numbers
of
the
selection
being
played.
After
programming
but
before
play,
or
when
checking
the
programmed
selections,
the
INDEX
in-
dicator
displays
the
order
the
selection
currently
displayed
on
the
TRACK
indicator
@
was
programmed.
(At
this
time
the
red
PGM
indicator
@
lights
up.)
@
Music
calendar
display
window
.
When
a
disc
is
inserted
and
the
player
is
on
stand-by,
the
number
of
selections
on
the
disc
is
displayed.
For
a
disc
with
21
or
more
selections,
1
—
20
light
up,
as
well
as
the
OVER
indicator
@.
,
The
display
changes
according
to
the
mode
and
which
function
keys
are
pressed.
@ OVER indicator
This
indicator
lights
up
when
a
disc
with
more
than
21
selections is inserted.
—9Q—
@ LINE OUT jacks
This unit is equipped with two pairs of LINE OUT jacks.
The FIXED jacks have a constant output level and the
VARIABLE jacks output level can be changed with the
LINE OUT control @.
The VARIABLE jacks are convenient to use for matching
the playback sound levels of a tuner or other audio
equipment. and the CD player without having to adjust
the volume control of the amplifier.
The VARIABLE jacks output level can be also adjusted
_ with supplied remote commander.
@® PLAY MODE initializing switch
This switch performs the same function as the PLAY
MODE keys @ on the front panel. The setting of this
switch—CONTINUE, SINGLE -or PROGRAM—deter-
mines the mode when power is turned on, so set this
switch to the mode most often used. After the power is
turned on, change the mode with the PLAY MODE keys
@, as this switch does not work once the power is turn-
ed on.
@ ACCESSORY CONNECTOR
This connector can be used to connect an optional
equipment which will be available in the future.

CDP-502ES/620ES
SECTION 1
OUTLINE
CIRCUIT DESCRIPTION
1-1, OUTLINE 10101 1C601 1C603
CX20109 CX23035 CX23034
D/A
LINE OUT
OPTICAL
CON-
PICK-UP
DIGITAL
VERTER
BLOCK
FILTER
FILTER
AMP
1¢501
CX20108
uv
SERVO N KEY INPUT
TRACK { REMOTE CONTROL
JUMP INPUT
Above block diagram shows configuration of this
set. Master control IC (IC702) serves as the center of
all operation. Master control IC (IC702) assumes
interface between. man and machine like key input
and remote control input. Mechanical control IC
(IC701) assumes interface between master control IC
(IC702) and machine,
For example, if PLAY button is pressed from key
input, master control (IC702) gives mechanical con-
trol IC (1C701).a command to make PLAY mode.
When. this command is given, mechanical control IC
(IC701) works in routine operation to make PLAY
mode. It gives every kind of commands for ICS501,
601 and they are in PLAY mode.
Through [C501 and IC601 use common data bus,
they distinguish a command for IC501 or IC601 by
a higher rank 4 bit value of each command from
mechanical control IC (IC701).
Command for ICS01: higher rank 4 bit 0000-0011
(0-3 with sexadecimal number system) are used.
Command for IC601: higher rank 4 bit 1010-1110
(A-E with sexadecimal number system) are used.
IC501 controls servo (focus, tracking, sled) mainly.
IC601 checks EFM demodulation and CRC.

CDP-502ES/620ES
The illustration below shows flow chart of simple
operation after power is ON.
POWER ON
CONFIRM NO
THAT TOC WHEN SLED POSITION
IS READ. IS OUT-OF NORMAL ONE.
EACH IC RESET
INITIAL
SETTING
ta
YES
ae
YES
IS DISC
TABLE
CLOSED?
NO
CLOSE DISC
TABLE
RETURN AT THE
BEGINNING OF
THE SELECTION BY
100 TRACK JUMP.
IN CASE OF
OPPOSITE SIDE
DISC MAY RUN
AWAY.
DOES PLAY NO
LAMP GO ON?
MOVE SLED MOTOR
AND SET IT AT
INNERMOST
CIRCUMFERENCE.
PLAY
MAKE FOCUS
SEARCH AND
CHECK IF DISC
IS INSERTED.
MAKE STOP MODE.
iS THERE
REMOTE
CONTROL
INPUT?
1S DISC NO
INSERTED?
YES STOP MODE
TO EACH
MODE
ROTATE DISC
TO EACH
MODE
MOTOR
CONFIRM THAT
TOC IS READ.

1-2. SIGNAL FLOW
The compact disc player applies a laser beam to
the pits on the compact disc, which represent re-
corded music information, and extracts the changes
. in the reflected light and converts them into analog
signals.
The following is an explanation of the signal flow
on this model.
The changes in laser light reflection are extracted
as current changes by the pick-up section photodiode.
(The current flow changes according to the amount
of light hitting the photodiode.) This signal is applied
to IC101 RF amp. At the same time, tracking error
and focus error detection is done by the photodiode,
and those signals are also applied to the RF amp.
The signal is amplified at IC101 and output from
pin Q0. This signal is called the EFM singal, and
besides music data, includes time and location data
called the sync signal and Q data, as well as CRC
check signal and others.
This singal is applied to IC601, and these signals
are written in to the RAM all at once. Next the
signals are read out from this RAM and divided into
the different types of data mentioned above.
Then CRC check is done and if there are any
errors they are corrected.
The music data only is then sent out to IC603
digital filter circuit.
CDP-502ES/620ES
The digital filter removes the sampling frequency
component which is contained in the music data, and
the sampling frequency is normally more than double
the frequency range which is to be sampled. For CD,
signals up to 20 kHz are sampled at 44.1 kHz. In
order to pass this signal through the low pass filter
and play it back, a low pass filter with a sharp curve
for cutting the components above 20 kHz is required.
So, the digital filter is used, and by making the
intermediate value from the sampled data, it is as if
the sampling frequency were doubled, and the sampl-
' ing frequency becomes 88.2 kHz. Therefore the low
pass filter does not need such a sharp curve and cir-
cuit structure is easier. After passing the digital filter,
the signal goes to IC352 D/A converter.
The D/A converter on this model is the integrated
type, and integrates a uniform current at a time width
in proportion to input data, to obtain an analog
voltage value which corresponds to the data.
This voltage is sample extracted at the anolog
switch and applied to the low pass filter. This is done
alternately for L-CH and R-CH, and the music is
played.
Data other than music data is sent to the mechani-
cal computer after CRC check at IC601. Among
these data, Q is used as direct search data, and gives
high speed access.

>DP-502ES/620ES
The various IC’s are explained below.
The role of the master microcomputer IC702:
The master controls all of the operations. It con-
trols key input and remote control input and display,
and also sends commands to the mechanical com-
puter, IC701.
Pin Functions
1KEYO —
2 KEY1 —_—
3 KEY2 - 49 {——>
4 KEY3 —_——
5 KEY4 ——
6
KEYS
ee
7 KEY6 ——
8 KEY7 —_—
9 OSC —_——
10 OSC —
11 RESET >
12 TEST —_—
13 Q INT __
14 COTIROUS SELECTION
15 1 SELECTION >
16 TIMER SW —_——
17 SEG q —-
18 SI CLK ——
19 STD —
20 SI DATA 23|———>_ Request signal! for data input/output
21 GND 22\}——- _ Acknowledge signal for data input/output
Display output data
Key input detection
Disc table OPEN/CLOSE detection
Port select signal
OSC clock input
Data input/output with equipment connected to
Reset signal input
; accessory port.
Interrupt input, interrupt at “L””
Continuous, 1 selection switch {
Timer switch signal input Data input/output
Segment g contro!
Remote control data clock signal! Request, acknowledge signals for data input/output
with equipment connected to accessory port.
NN ee eet
Data display strobe signal
' Data input from remote contro)
TLE EEL
When commands are sent from the master control Example: CLOSE command. (CF)
IC C702) to the mechanism control IC, the master M REQ
control IC sets the data to be sent and makes the eer
M REQ pin go low from high, as shown in the figure.
: ; S ACK
When the M REQ pin goes low, the mechanism con- \ f
trol IC (IC701) makes the S ACK pin go low from
high. At the time data is taken in to the mechanism WT» [0
CMDO
control IC (IC701).
When the master control IC (IC702) confirms that ; VII
the S ACK pin has gone low, it sets the next data and CMD1
makes the M REQ pin high. When the M REQ pin
goes high, the mechanism control IC (IC701) makes cmp2 YUM); 1 1
the S ACK pin high and reads in the data.
CMD3 TL, ' ;
c F

Command from master control IC (IC702) to
mechanism control IC (IC701).
Performs
A
>
B
repeat.
The
place
for
A
is
memorized
CDP-502ES/620ES
When the INDEX key is
pressed,
TRACK
NO
and
INDEX
NO
are
input
and
>
that
data
is
put
into
the
*
section
and
set
out,
the
pick-up
is
returned
to
the
place
with
that
vavlue,
and
repeats play between that point and the point where
This command is sent out when the TOC data in the
mechanism control IC is desired, and is sent out during
Command
OPEN DF Opens disc compartment.
CLOSE CF Closes disc compartment.
AMS
A
*
*
OIF
Perform
AMS.
If
for
the
5th
selection:
AOSOIF
see
TRACK NO
INDEX
A
* *
*
*
F
Perfroms
index
search.
TRACK NO INDEX NO sent.
LOCATION B *¥ * %* %# #*° & * * «* OF
[em . asi) Op L4
TRACK NO INDEX NO MIN SEC FRAME
; B was pressed.
STOP 1F Stops spindle motor and sled motor.
manual search 4F-9F Sends out during FF and REW.
4F
FF
during
PAUSE.
Performs
40
track
jump
after
a
certain
time
passes.
|
SF REW during PAUSE.
6F FF Performs 40 track jump after a certain time passes.
TF REW
8F, 9F not used
PAUSE 3F PAUSE
PLAY 2F normal PLAY command
TOC REQ eR ke Rk ek OR UK & (FD
ee ee ee
H L MIN SEC MIN SEC
\selection Nn? \setection N + v
The above signals are sent from CMDO-CMD3 to
the mechanism control IC.
The mechanism control IC executes these com-
mands.
Commands sent from the mechanism control IC
(IC701) to the master control IC (IC702).
TOC, Q data C * * *# * * * * & * & & & &
Ge ee fe ee, ee ed
TRACK NO INDEX NO MIN SEC FRAME MIN SEC
Coos at a,
elapsed time in elapsed time from
the track beginning of disc
TOC READ END A (F) Sent out when TOC data read-in is finished.
LEAD OUT B (F) Sent out when disc ends.
NO DISC E (F) Sent out when there is no disc in the disc compartment.
OPEN D(F) Sent out when the disc compartment is open.
The mechanism control IC (IC701) keeps the TOC
data and Q data read in from the disc; and sends it to
the master control IC (IC702) as required.
—15—
random access, when selection changes, etc.
FE TOC data or Q data is sent.

CDP-502ES/620ES
Display
control
is
done
by
master
microcomputer
pins
64)
—
G6)
(SO
—
$2),
G8)
—
Gi)
(RO
—
R3)
and
17
(SEG
q).
RO
—
R3
are
for
data,
SO
—
S2
are
for
port
select
signals
of
the
expansion
IC
(1C801)
and
SEG
q
is
for
segment
q
control.
Data
is
displayed
by
the
trigger
of
pin
(STD)
signal.
Mechanical
Microcomputer
(1C701)
This
IC
controls
IC501
and
IC601
and
commands
using
pins
(DATA),
@2)
(CLOCK)
and
(LATCH).
Also,
this
IC
memorizes
TOC
data
and
Q
data,
and
direct
search,
etc,
are
performed
based
on
this data.
Pin Functions
Muting output
Oscillator signal
Reset signal input
98 frame sync signal
Disc
table
closed
detection
Disc
table
open
detection
|
Focus
detection;
Focus
OK
at
“L”
7.35
kHz
clock
when
frame
sync
is
locked
Frame
sync
signal
detection
Q
data
input
REC-M-SYNC VDD42
——)| 1
———]
2
PAUSE
SYNC
EPs41}|——>
——|
3
REC
LOAD
OUT40|——>
——|
4
ADJUST
LOAD
1N39|———>
<——|
5
MUTE
LD
ON38|-———
——|
6
DRS
OFF
CMD3
37|}——_—>
——|7
CMD
2
36
|———>
———}
8
CMD
135|———>
——
|
3
osc
CMD0
34|———
—
M.REQ33
}——
——>|11
RESET
S
ACK32|———>
oe
Q
INT31|-———>
———|13
SCOR
30
——|14
SLED
STOP29
|-———
——
15
IN
SW
SLED
GAIN28
|———>
——+|16
OUT
SW
CLOCK27
|———>
——
17
F.0K
DATAz6
|——>
——>}18
WFCK
DIRCON25
|-——>
——+|19
GFS
LATCH24|——>
———]|20
suB
Q
Q.CHECK23
|————
GND SENSE22 |}-———_
Emphasis ON/OFF contro!
Loading OUT
Loading IN
Laser ON
Command signal input from master QO data signal
output to master
Request signal for data input/output
Acknowledge signal for data input/output
Interrupt signal when Q data is sent to master
Not used
Sled motor movement detection
Used of high speed sledding, etc.
Clock
signal
during
data
output
Output data
Direct search control signa!
Output data latch signal
Q data CRC check results, comes synchronized
to SCOR. Error when “L”.
Varies depending on operation.

The Q data called subcode Q is used for TOC
(Table of Contents) at the lead-in area and mode con-
trol signals for preemphasis, etc. and also for display
and address data of track number (TNO) and index
number, playing time and other information during
a selection.
This data is input to mechanism control IC (IC701)
SUB Q pin from IC601 and is written in to the RAM
in 8 bit units.
The data is sent out as needed from the mecha-
nism control IC701 to the master control IC (IC702)
and is displayed onthe display tube. Data is sent
from the mechanism control IC to the master control
IC about 8 times in one second.
CDP-502ES/620ES
ee ee 8 te S88 E88 eS SHE ESTES SST SS SESS STEELS ETE
1-3. DIRECT SEARCH
On this set, a linear motor is used for the sled
motor, so that besides 100, 10 and 1.track jump, the
optical pick-up can be moved directly to the address
specified by the microcomputer. (direct search). (On
the conventional CD player, only the objective lens
moves, and the optical pick-up follows it by servo in
order to perform 100, 10 and 1 track jump only.)
Higher performance access is enabled on this set.
On the convertional CD player, only three data,
AO (MNR of first selection on the disc), Al (MNR
of last selection on the disc) and A2 (leadout track
start point) were memorized when TOC data was read
in to the microcomputer. However, on this model,
the absolute time from the first to the 21st selection
is memorized in the microcomputer. This absolute
time is converted to track numbers inside the micro-
computer, and the track number.to be jumped is
obtained by subtracting the current address track
number from the track number of the selection to be
jumped to.
PMIN, PSEC, RFRAME
00, 02, 32
00, 02, 32
00, 02, 32
10,15, 12
10, 15,12
10,15, 12
16, 28, 63
16, 28, 63
16, 28, 63
Frame number
49, 10, 03
49, 10, 03
49,10, 03
01, 00, 00
01, 00, 00
01, 00, 00
06, 00, 00
06, 00, 00
06, 00, 00
52,48, 41
52,48, 41
52, 48, 41
00, 02, 32
00, 03,-32 |7Peat
Frame number: 98 symbol, 1 block No.
POINT = For AO, PMIN indicates MNR of first selection
on the disc. PSEC, PFRAME are ‘‘00”.
POINT = For Al, PMIN indicates MNR of last selection
on the disc. PSEC, PFRAME are ‘‘00”.
POINT = For A2, PSEC, PFRAME indicate lead-out
track start point.
POINT = For 01-06, PMIN, PSEC indicate the absolute
time of the selection.
Table A. TOC Structure (Example of a 6 selection disc)

“=DP-502ES/620ES
Direct
search
is
performed
as
follows:
When
the
search
command
is
input
to
the
mecha-
nism
control
to
(IC303)
from
the
master
control
IC
(1C302)
due
to
key
input
or
remote
control
input,
the
mechanism
control
IC303
converts
the
current
address
to
track
number
from
the
data
Q
of
the
current
address
channel
Q
(Figure
1)
data.
(This
data
Q
is
always
input
from
pin
20
SUB
Q
during
play.)
The
address
to
be
jumped
to
is
also
converted
to
a
track
number,
the
track
numbers
are
compared,
and
|
the
number
of
tracks
to
be
jumped
is
calculated.
be
2aete
a
“{*
16
—>
aes
bits
——_——_> time
SO, S1:
CONTROL:
parts of sync pattern.
Indicates
channel
number
and
preemphasis
ON/OFF.
Output from MSB
0000
—
2CH,
no
preemphasis
1000
—
4CH,
no
preemphasis
0001
—
2CH,
preemphasis
1001 — 4CH, preemphasis
LSB
=
O
at
lead-in
and
lead-out
portions.
Control
bit
for
DATA-Q.
Output
from
MSB.
72
bits
of
data;
output
from
MSB.
CRC
for
CONTROL,
ADR,
DATA-Q.
Refer
to
PCM-F1
Operation
Manual
for
details
on
CRC.
Output
from
MSB.
Generation multinominal is
P
(x)
=
X16
+:X12
+
XS
+4
ADR:
DATA-Q:
CRC:
Figure
1.
Channel
Q
Structure
—
Data
Form
on
Lead-in
Track
(indicate
TOC)
—
{00)
Pan
au
eu
Pa
he
28
ice
72 bits
data-Q
—
Data
Form
of
Music
Signal
and
Lead-out
Track
—
Se
Ge
Aa
a
Dea!
ee
data-Q
MNR:
Expresses
Music
Number
as
aa
digits
of
BCD.
00
>
Lead-in
track
01-99
—
Music
number
AA
>
Lead-out
track
x:
MNR
index,
expressed
as
2
digits
of
BCD.
1+
MNR
is
divided
into
100.
The
method
of
division
is
determined
by
the
software,
and
numbering
is
in
order
from
“00-99.
Does
not
exist
on
lead-in
track,
00
>
Pause
encoding
Applies
pause.
There
is
2-3
seconds
of
pause
encoding
at
the
top
of
the
selection.
01-99
>Sub-division
number.
X
=
01
on
the
lead-out
track,
MNR
=
01-99
and
X
&
00
during
a
selection,
Initial
value
is
‘01’,
then
increases
by
ones.
ZERO:
All
these
8
bits
are
0”.
MIN,
SEC,
FRAME:
Selection
running
time
is
expressed
by
BCD
6
digits.
Al!
0’
at
beginning
of
selection.
Time
increases
during
the
selection,
stops
at
pause.
Become
"OQ"
at
end
of
pause.
Time
increases
on
lead-in
and
lead-out
tracks.
1MIN
=
60
SEC,
1SEC
=
75
FRAME
(00-74)
AMIN,
ASEC,
AFRAME:
Disc
running
time
is
expressed
as
BCD
6
digits.
At
start
of
disc
program
area,
time
is
"OQ"
and
MNR
is
the
first
value
of
that
disc.
1AMIN
=
60
ASEC,
1ASEC
=
75
AFRAME
(00-74)
POINT,
PMIN,
PSEC,
PFRAME:
Disc
table
of
contents
is
on
this
part
of
the
lead-in
track.
As
shown
in
the
table,
it
is
recorded
continuously
and
repeatedly
on
the
lead-in
track,
or
MNR=00
portion.
Also,
each
content
is
recorded
3
times
each.
PMIN,
PSEC,
PFRAME
values
each
express
selection
start
point.
There
is
+1
second
precision
on
AMIN,
ASEC,
AFRAME
time
axes.
Figure
2,
Data
Q
Structure
Next,
the
mechanism
contro}
IC
puts
the
digital
signal
processing/CLV
servo
IC
(IC307)
CX23035
into
counter
set
mode.
By
doing
this,
CX23035
outputs
the
CNIN
pin
input
signal
CNIN/2h
(Hz)
signal
from
SENSE
pin
(18)(COUNT).
At
this
time
41
is
set
in
n,
so
a
signal
which
is
the
input
signal
divided
by
82
is
output
from
the
SENSE
pin.
Then
tracking
and
sled
servo
go
off,
focus
servo
goes
on
and
the
optical
pick-up
is
moved
quickly
by
the
linear
(sled)
motor.
When
this
happens
the
RF
amp
(IC201)
CX20109
MIRR
pin
(8)mirror
output
is
as
shown
in
Figure
3.
(For
example,
if
there
are
20000
tracks
from
the
innermost
to
outermost
cir-
cumference,
and
access
is
done
in
0.5
seconds,
mirror
output
is
40
kHz,
which
is
too
fast
for
the
mechanism
control
IC
to
read.)
MIRR (18) LLL
XLT Terminal
@ 480 6 GG G—bis
Optical ial pick -up moves.
Figure
3.
Mirror
Output
for
Direct
Search
cnn
GIN
aaa
SENS
(8)
X
|
eae
ares
Figure
4.
Count
Signal
Timing

This mirror output is input to CX23035 CNIN pin
©) then is divided into 41 and output from SENSE
pin (18) to the mechanism control IC SENS pin Q2.
(At this time, it is divided and can be read.) This
input signal is counted by the mechanism control IC
at rise or fall and is converted to the number of tracks
to be jumped. For example, for a 1000 track jump,
consecutive cmparison, such as 1000/82 = 12 is done
and when that value is reached, each servo is turned
on and the optical pick-up is braked. Then DATA-Q
is read, converted to track number, and if within a
certain range, 100, 10, 1 track jump are performed
and convergence is done. Outside of that range,
direct search is performed again.
CX 23035
CX20109
data
RF amp demodulation
1c 101 = 1Cc601
4 } Mirror output
is input to CX23035.
digital
filter
Optical
pick-up
CX20108
The divided signal
enters mechanism control IC.
Mechanism control IC counts that signal.
Mechanism
control 1C701
Q@ search command is output.
} Master Control
1C702
computer
C1) Key input or remote control input.
Frame Structure of EFM Modulated Recorded Signal
iframe (588 bits) =
coupling
bit
parity
a Q
frame sync signal : ; : ;
TH
bits]
1
bite
2
bis
SYNC
(frame
sync)
=
24
bits
+
3
bits
(coupling
bit)
1 0 1 User’s bit (P-W) 14 bits + 3 bits (coupling bit)
or Data symbol
11 bits(11 bits 2 bits Parity symbol
(6) 1 | 0
1 Frame = 588 channel bits
parity
D/A converter
low pass filter
Data Q is constantly input to [C303 during play.
@ When mechanism control IC finishes counting, each servo
is turned on and the sled motor is braked.
4) Tracking, sled servo OFF. Focus servo ON, sled motor moves.
| :
| 7) is performed again and next track jump is determined.
(3) Difference between present address and address to be jumped to is
converted to track number. If far away, direct search is done.
24 x (14 bits + 3 bits (coupling bit)) 6 samples for each left & right group
8 x (14 bits + 3 bits (coupling bit))
CDP-502ES/620ES | CDP-502ES/620ES —
The CD player can read out (1 frame (588 bits) x
98 frames x 75) in one second. 98 frames x 75 = 7350
SYNC (frame sync signal) identifies the beginning
of the frame during playback, and is for frame sync,
and a 24 bit pattern is used so that it will not be
generated during other signals.
The time of 1 frame is 136.05 usec (1/7350), so
the frame repeat frequency is 7.35 kHz. This sync
signal is applied to mechanism control pin during
frame sync lock.
The channel bit frequency is 7.35 kHz x 588=
4.3218 MHz.
The user’s bit, of which there is one symbol in >
each frame, is called a subcode, and 98 symbols are
gathered to form one data block (subcode frame).
The subcode has 8 channels, P, Q and R — W, and
the 8 bits in one symbol are composed of one bit
from each channel.
P is used as selection dividing mark, and Q is used
for TOC (Table of Contents) at the lead-in area and
for the mode control signal preemphasis and also for
display and address data of track number (TNO),
index number, playing time and other information
during a selection.
The data is renewed for each of these every 98
frames, or every 1/75 seconds.
EFM converts 8 bit data to 14 bits and modulates.
For 8 bit data 1 and 0, there. are 2° = 256 combi-
nations, and for 14 bit data, it is 2*4 = 16384.
For EFM, relative to the 8 bit data pattern, “‘more
than 2 0’s between bit 1 and 1, but less than 10” is
selected from the 14 bit data pattern.
3 bit coupling bits are inserted between the con-
verted 14 bit blocks. 1 symbol 8 bit data bit includes
a coupling bit and is converted to 17 bits. The con-
verted bit is called a channel bit.
When 14 bits and 14 bits are coupled, the coupling
bit has more than two 0’s.
LINE OUT
1C352 D/A Converter
A 16 bit serial signal is input to pin (DIN) as
the data. The data synchronizes to the rise of pin
(BCLK) and is taken into the IC from the MSB, in
order. :
At the 17th fall of BCLK, if pin (8) (WCLK) goes
from high to low, the 16 bit data is transferred from
the shift register to the latch.
Each channel’s data is taken in from the 17th one.
When pin (11) (LRCK) is low, R-CH data is taken in.
When pin (i) (LRCK) is high, L-CH data is taken in.
Data output is R-CH signal output from pins
(IOUTL) and @3) (DCL) when LRCK is low.
When LRCK is high, R-CH signal is output from
pins (7) (IOUTR) and (3) (DCR).
The data transferred to the latch is set in the coun-
ter.
Current flows from ICOUTL or ICOUTR by inte-
grated current start signal, but the counter determines
the flow time.
Data is preset in the counter, and counting is
started from that value. After counting, and after
counting offset, output is stopped by the integrated
current stop signal.
In this way the digital signal is converted to
analog.
DCR and DCL are for discharging the voltage
charged during integration and are output before inte-
grated current start.
Q301 and Q401 are FET for discharging.
1C355
1C355 performs signal switching, and«switches L-
CH and R-CH alternately at high speed; Bet ae
The truth table is shown below. On: this set A.and
C are connected, so there are only two methods of
use, () and Q). 2
IC352 pin (1) (LRCK_OUT) is connected to:
1C355_ pins (9) (C) and (1) (A), and LRCK OUT
signal is output synchronized with LRCK, and this’ ©
signal switches L-CH and R-CH. :
Truth Table
CONTROL INPUTS Pins which
INHIBIT
leo
a
L
|
0X,0Y,0z
1X, OY, 02
0X, 1Y, 0Z
1X, 1Y, 0Z
0X, OY, 1Z
1X, 0Y,1Z
. a 1X, 1Y,1Z
Bye | eee
rpc oper
=| a
H
L
H
L
H
myeye “| xo} a Ki) oOo} x
Aree mene.

Filter
The output from the D/A converter is a discrete
waveform
formed
of
samplied
value
pulses,
and
a
low
pass
filter
is
used
to
extract
the
low
range
component
only, which is the data component.
The
D/A
converter
output
waveform
and
frequen-
cy
component
are
shown
below.
D/A converter output
waveform u
sideband component wafeforms
oN
+d
}
¢
frequency spectrum |
—_—_—_
|
\
low range component and Ub
level
fs/2 fs 2fs
—— frequency
r Output Waveforms and Frequency
ter output waveform is the same as
ipled waveform; the frequency com-
d of a sideband component whose
e integer of the fundamental wave
( ymponent and sampled frequency fs.
There “is ‘fold component right above the funda-
mental wave: component upper limit, and if these
components go to the amp and speakers as is, modu-
lation distortion and tweeter damage may occur.
In order to eliminate the unnecessary components
over 20 kHz, a filter having sharp attenuation re-
sponse is required, as the fold component frequency
lower limit is 24 kHz, relatively near.
Digital Filter
The digital filter processes the discrete sampled
signal frequency component at the digital data stage,
so of course it is before the D/A converter.
sampled sampled waveform spectrum | ie
frequency range determined at A/D side
@® fs
fs/2 fs 2fs
@ 2fs
fs/2 2fs
digital filter
actually digital data
— Ts/n — delay
input |
abit a
4
oa kh
multiplier
adder
| bk
Ts/n
The theory and structure is based on complicated
logic, and therefore is rather difficult to understand,
but for the D/A low pass filter, it can be thought of
as sampled frequency. multiplication. This is illus-
trated in the above figure.
If the analog signal range controled to less than
1/2 of the sampled frequency fs is sampled by fs, the
waveform and spectrum become as shown at @) in
the diagram. This corresponds to sampling the signal
up to 20 kHz on CD with 44.1 kHz.
If the same range signal is sampled by 2fs, that
waveform and range should become as shown by
in the diagram. The played back sample data cor-
respond to the sample values in @) , but if the sample
data obtained by sampling this sample data at 2fs
could be made at the middle of each sample, the out-
put waveforms would be as shown in @), and side-
band components having fs as center could be elimi-
nated.
Actually, true sample data can not be made, and
there is error, but this can be sufficiently minimized
by performing many different operations. In this
way, the sampled frequency is raised 3 and 4 times
equivalently, shifting the high range components
higher, and finally eliminating them with a simple
analog filter. ,
multiplication coefficient
CDP-502ES/620ES
CDP-502ES/620ES
|
|
_
TINS
eee
ee
ee
eee
eae
eeneeeee
eee
e
esse
neces
ssn
eaas
eee
e
eens eeee
eee
e
esse
ene
reer
ee
EATS
en ae
tO
HEE
eI
eDOT
ELST
D
EREDAR
SETAE
ESSA
REELS SEDEE
ESE
O
LESSOR
RDO
EEEtEE
PRES
EOESEO
HEROES
sabE
GES
ouEsSeDeuuNESrEaGOEEeeSDaeeenS

N\ | " . | \
CDP-502ES/620ES CDP-502ES/620ES
SECTION 2
BLOCK DIAGRAM
D/A AMP (1) ® 6) o/a: amp (7) G3) ar ame (i) ;
1C301 ics RV301 . 321
1€301, Q301 53 @) () 2
DATA
DIGITAL
LOW-PASS
FILTER
é b
<
[HEADPHONES]
iA NG - a
Gat
Pure
OAT
switcal
1€302,
303
of]
;
.
HEADPHONI ‘
BCLK XTAL a db } | 1 LINE OUT ‘AMP
D/A AMP I 1 S
©) 1401 Ge se awe @) ' aveoi | 16354 J,
ONE: 1€353 H i
P -502ES; LOW-PASS FILTER ' a
| veo MODEL 1¢402, 403 eal Ae ‘J
“620ES;
o
'
|
060
2
|
rb
l
[Line
our]
5 I 6 7
| BUFFER | i @ .-cH
(C361
i |
"
CONTROL
1
VARIABLE
Geer cabs | IC351 | J | :
<a
———
|
l
|
©).
R-CH
es RY351 !
E
|
|
ReLay
DRWvE
|
DRIVE
\]
set
\
'
0705 IN : |
i —t L-CH
|
\
|
:
[Fiz]
\
LASER DIODE | ee
I
i
\
\
a
G 0808-810 H
0812 813 |
|
LED DRIVE
saith ‘
DISPLAY CONTROL g
C801 spa ¢ |
seb TFFER ~- FLUORESCENT
MD
BLOCK
Dicit
cade
S04
INDICATOR
TUBE
!
MOTOR
\
DRIVE
$40!
us! gtst, 182 CONTINUOUS SELECTION (5) : PLAY MODE
ois CLV. SERVO el le, PROGRAM $846 -
MOTOR 2) conrRoL @ ; = +
:
ae
1C504
,604
0
ACCESSORY
PORT
“SINGLE
|
a"
CONTROL
CONTINUE
0
10
“3301
;
Pot
ACCESSORY
vehi
t
.
LOAD
IN
DET
!
ON
‘ KEY MATRIX
asl.
fl
OFF
$801
-836
|
SWITCHING
asi2
$652
5841-845
|
SWITCHING
2
Loan,
our
DET
|
N
C220) 3 t
CLOSE SIGNAL DETECTOR
TRACKING
;
. G7) moToR !
M52 7 2
TRACKING
COIL 3
4
M5!
Focus = g
COIL
d OmitaO: @3)sLED MoTOR
|
M53
é
10502
CONTROL
>
Gb ©
|
SWITCHING
(28)
SLED
COIL
050i, 502 GAIN
SCHMITT
acu €9) sLED colt STOP ont Sya
ay
:
ACCESSORY
PORT
0901
~904
SENSOR
Colt
REG.
ja95i—954
M65i
FLUORESCENT
CHUCKING
een
INDICATOR
TUBE,
2201
ON
MOTOR
DRIVE
FILAMENT
-
POWER
Q509 510 @9 Loap out
OFF
oe
@
B—ot—hec
IN
; $653 CH
Mes2
MOTOR
SELECT
a7
KA
CH
1c704
LOADING
.
)
RECT
©
|
CHUCKING
SIDE
Ay,
sei
se
+ (B) SWITCHING TO RESET TERMINAL 8. <| 90 <1 u 0991, 992
LOADING. SIDE o702 OF EACH IC
TCHING
sw 99t

SECTION 3
DISASSEMBLY
Note: Follow the disassembly procedure in the numerical order given.
3-1. DISASSEMBLY
TOP PLATE/FRONT PANEL
@ - @: top plate
6-9:
front panel section
: display section
: key board section
@ TA B2.6x6
@ 74 826x8
C5] front panel section
@ Remove bottom plate,
BU-1
(BASE
UNIT)
1)
Bue
’ insulator pole
compression spring spring
compression
(insulator
B)
(main
board)
NY
4
=
O
83
x
20
a
i
insulator
pole
ec
O—
f
=
b-—
compression
spring
S
i
(insulator C)
@ cnJ103 e
in b I,
_ (main board) ENDS “eg
Note (1): When replacing (main board)
BU-1, refer to
“NOTES ON
HANDLING
BU-1 (BASE
UNIT) on page 5
to prevent damage
caused by static
electricity.
Note (2): Each compression spring (insulator) differs
in size and turns. When installing it, refer
to the following list. :
@ cnv104
(laser sw board) ;
compression spring
(insulator)
silver
@ 83x 20
CA
__ CDP-502ES/620ES
CDP-502ES/620ES |
insulator pole
CNJI151
(insulator A)
AUDIO/SERVO/OUTPUT BOARD
—@ >: audio board
0
A\—A\ : servo board
[1]—[2] : output board
AN BVTT3 x 8
A\servo board S
O aviT3xe
&S
es
Bye
Q audio board
@ BvTT3x8
g
&
{2] output board
“lll OVS @ AN BV3 x 8
Kan
A ornamental plate (R}
LOADING MOTOR, FF BELT, DRIVE BELT, LOAD OUT SW BOARD
@Oevir3x 5
O P2.6x3
@ belt cover Ey t |
gs
loading motor
(M652)
QO drive belt
load out sw board
(S652)
loading motor
main ‘board chucking motor board
—~