Sony CDP-68 User manual

SERIJICE
MANUAL US Model
US Model
CDP.NTESD
US Model
Canadian
Model
AEP Model
UK Model
E Model
cDP-750
PHOTO:CDP-75O
coP-68
@mplctdlsc plet€r
System Compact
disc
player
Laser Semiconductor
laser
(À=780
nm)
Laser
output Max.0.4
mW
+This
outputis
thevalue
measured
at
adistance
ofabout1.6
mm
from
theobjective
lens
surface
ontheOptical
Pick-up
Btock.
Frequencyresponse 2Hz- ?okH,z(r0.5dS)
Signaltonoise
ratio More
than102
dB
Oynamicrange More
than
95dB
Harmonlcdistortion Lessthan
0.003%
(at
1
kHz)
Channel
separalion Morethan
95dB
Wow
and
flutter Belowmeasurable
limit
(t0.001%
WPEAK)
SPECIFICATIONS
Gcnoral
Power requirements
US, CanadianModel . . .
AEP Model.
UK Model.
E Model.
Power consumption
Dimensions
Weight
120V
AC,60Hz
22OV
AC,5O/60H2
240v Ac,50/60H2
110-120,220-2QV AC,
5O/@Hz
12W
Approx.430x 100 x 340mm
(w/h/dl
(17x4x13%inchesl
including
proiecting
parts
andcontrols
Approx.4.7kg
(10
lbs
6ozl,net
Remote
cornman
br (supplled)RM
-D4SO
Remote
control
system
Infrared
control
Power
requirements
3VDC
with
twoR6
batteries
(size
AA)
Dimensions 62x2!x 168.5
mm
(w/h/d)
(2\zxnlrx63la
inches)
Weighl 130 g(5
o4
including
batteries
Supplled
accessorles
COMPACT
DISG
PLAYER
Outpntt
Type Outputler/sl Loadimpedance
LINE
OUT Phono
jack 2V
(50
kilohms) more
than
10
kilohms
HEADPHON.
ES Stereo
jack 6.6mW
(32
ohms)
DIGITALOUT
lcDP-207ESD/
750:AEP,UK
modelsonlyl
Phono
jack 0.5Vp-p
O5
ohms) 75
ohms @nnectingcord
(2
phono
plugs
- 2phonoplugs) 1
Flemote
commander 1
R6
batteries 2
SONY

cDP_68
/2O7ESD/75,O
FEATURES
. PROGRAM
play
for
playing
uptoæ sêlections
inadesired
order
. SHUFFLE play
tor
playing
theselections
inarandom
order
. REPEAT
function
forasingleselection,
the
wholedisc,
PROGRAM
play,
or
SHUFFLE
play.
Or
foraparticular
portion
ofaselection.
. Easy-toread
display
window
showsthe
track
numberbeing
played,
elapsed
playing
time,and
theremaining
time,and
indicates
the
repeat
play,
shuffle
play,
autospace
functions.
rAutospace
function
torcreating
ablankspace
of3
seconds
between
each
selection.
.Timerplay
for
initiating
disc
play
atadesiredtime
(a
commercially
available
timer
isrequired).
. lndex
search
functionfor
quickly
locatingadesired
part
*
* Example:
A moræment
in asymphony.tndexsearchcân beusedonly for discs
havingindex numbers.
Suchdiscs have @:ffi) matk
SAFETY.RELATÊD COMPONENT
WARNINGI I
COMPONENTS
IDENTIFIED BY SHADING AND MARK
$ oru rxe scHEMATtc DIAcRAMS AND lN THE
PARTS LIST ARE CRITICAL TO SAFE OPERATION'
REPLACE
THESE
COMPONENTS
WITH SONY PARTS
WHOSE
PARTNUMBËRS
APPEAR
AS SHOWN
IN THIS
MANUAL OR IN SUPPLEMENTS
PUBLISHED
BY SONY.
CONTENTS
Section Title
SPECIFICATIONS
. I
FEATURES .........2
MODELIDENTIFICATION. .........3
SAFETYCHECK-OUT ........3
PROTECTION
OFEYESFROM
LASERBEAMDURING SERVICING. .4
SERVICTNGNOTE. .........5
LOCATION
AND FUNCTIONOF CONTROLS
. . .6
SECTIONl. ADJUSTMENTS... ...7-9
SECTION
2. DIAGRAMS
2.1. PRINTEDWIRING
BOARDS
. . .IO-12
2-2, SCHEMATIC
DIAGRAM t3-17
TcBLOCKDIAGRAMS ...18-19
DESCR|PTfON
OF1C101
(MSC6458}
. . . . . 20-2r
SECTION
3. EXPLODED
VIEWS
AND PARTS
LlsT.. ....22-2s
SECTION
4. ELECTRICAL
PARTS
LlsT.. ....26-29
TROUBLESHOOTING ......30
ATTENTION
AUCOMPOSANT
AYANTRAPPORT
A LA
SÉCURITÉI
LESCoMP(NANTS
IDENTIFIÉS
PAR UNE TRAME ET
uNE MAROUE l\ SUn LËS DIAGRAMMESSCHÉ'
MATIoUES
ET LA LTSTE
DESPIÈCESSONTCRITIOUES
POUR
LA SÉCURITÉ
DE FONCTIONNEMENT.
NE REM-
PLACER CES COMPOSANTS
OUE PAR DES PIÈCES
SONY DONT LESNUMÉROS
SONT
DONNÉSDANS
CE
MANUEL OU DANS LES
SUPPLËMÊNTS
PUBLIËS
PAR
SONY.
Page
-2-

cDP-68/2O7ESD
/75O
MODELIDENTIFICATION
- Specification Labels-
US,
Canadian
model:AC: 120 V-60 Hz12W
AEPmodel:AC:220V-50/60 Hz12W
UK model: AC:240
V-50/60 Hz
12VÙ
Emodef : AC: 110-120V,22O-24OV
-50/60 Hz12W
SAFETYCHECK.OUT
After correcting the original service problem,
perform the following safety check before releasing
the set to the customer:
Checkthe antenna terminals, metal trim, "metallized"
knobs, screws, and all other exposed metal parts for
AC leakage. Check leakageas
described
below.
LEAKAGE TEST
The AC leakage from any exposed
metal part to
earth gtound and from all exposed
metal parts
to any
exposedmetal part having a return to chassis,
must
not exceed 0.5mA (500 microampers). Leakage
current can be measured bv anv one of three
methods.
I . A commercial leakage tester, such as the
Simpson 229 or RCA WT-540A. Follow the
manufacturers'
instructionsto usetheseinstru-
ments.
2. A battery-operated AC milliammeter. The Data
Precision
245 digital multimeter is suitablefor
this job.
3. Measuringthe voltage drop across
a resistor
by
means
of .a VOM or battery-operatedAC volt-
meter. The "limit" indication is 0.75V, so
analog meters must have an accurate low-
voltage scale. The Simpson 250 and Sanwa
SH-63Trd are examplesof a passive VOM that
is suitable. Nearly all battery operated digital
multimeters that have a 2V AC range are
suitable. (See
Fig. A)
cDP-68
CDP.20TESD
t\
COMPACT
DISCPLAYER
AC:120V 60Hz 12W
SERIALNO.
MADE
IN
JAPAN
MODIL
NO. CDP.7sO
COMPACT
DISC
PLAYER
SERIAL NO,
MADE IN JAPAN
To Exposed Metal
Partson Set
O.l5yF AC
voltmeter
(o.75V)
? Earth Ground
Using
anAC voltmeter to checkAC leakage. ig. A.
-3-

cDP-68/2O7ESD/75O
PROTECTION
OF
EYES
FROMLASER
BEAM
DURING
SERVICING
This set employsalaser.Therefore,besure
to fol-
low carefullythe instructions
below
whenservicing.
CAUTION
Use
of controls
or adjustments
or performance
of procedures
otherthanthose
specified
herein
mayresult
inhazardous
radiation
exposure.
l. LaserDiode
Properties
o Material: GaAlAs
o Wavelength:
780nm
a EmissionDuration: continuous
o LaserOutput: max.
44.6
PW*
* Thisoutputis thevaluemeasured
atadistanc€of
about200mmfrom theobjectivelens
surface
on
theOptical
Pick-up
Block.
2. During service,
do not take the Optical Pick-up
Block apart, and do not adjustthe APC circuit.
If thereisa breakdown
in theAPC circuit(includ-
ing laserdiode),replacethe entireOptiocalPick-
up Block
(including
APCborad).
BESKYTTELSE
AF
@JNE
MODLASERSTRALING
UNDERSERVICE
I dette apparat anvendeslaserlys. Derfor skal I
nedenstâende
instruktioner
nojefolgesunderservice.
Folg iovrigt instruktionernei servicemanualen.
ADVARSEL!!
Under
selice mâojnene
ikko kommonærobjektiv-linsen
pâ den optiske pick-up enhed. I tllfældo af tt d€t e.
nodvendigt at kontrollere udsendelsen af larerlye, skal
det ske i en afstand af mere end 25cm fra den optisko
pick-up.
LASER
ADVARSEL
MÆRKNING
Folgendemærkning
findes
indvendig
i apparatet:
l. Advarsel
Mærkning
. Laser-didoe
data
o Materiale:GaAlAs
o Balgelængde:
780nm
. Udstrâling:
Kontinuerlig
a Laseroutput:
Max.0,4
mW*
* Màlt i 1,6
mm afstand
fra overfladen
af objektiv-
linsen
pâ
den
optiske
pick-up
enhed.
o Klassifikation: Klasse
IIIb.
2. Adskil aldrig den optiske pick-up enhed under
service,ogjuster ikke APC kredslsbet(Automatic
Power Control). Hvis APC kredslsbet
(incl. laser-
dioden) bryder ned, skal heleden optiske pick-up
enhed
(incl. APCprintkortet) udskiftes.
CAUTTON : rivrsrar€ rasEn BlDrlrrot taEt oPE{
^ro rrrEaLoc(s oEaE^t€o AvorocrPosuFE
1o ô€^x
AOVARSEL : usv|rrc LAsErsrÀlLr{G v€o ^art{c
Nln srx(€RHEoSATEFyoEFE
EFuoÉ aa tuNtrrot uNocl
uosÆtrE!s€
rot sTnl!rxc
VAROITUS: Laitesisâltââ,
laserdiodin,
jokalâhettââ
(nâkymâtôntâ)
silnrille
vaarallistalasersateilyâ.
-4-

cDP-68
/207Es,D/75,0
NOTES
ON HANDLING
THE OPTICAL
PICK.
UP BLOCKOR BASEUNIT
The laser diode in the optical pick-up block may
suffer electrostatic
breakdown because
of the poten-
tial difference
generated
by the charged
electrostatrc
load,etc.on clothing and the human body.
During repair, pay attention to electrostatic
break-
down and also use the procedure in the printed
matter which.isincluded
in the repair
parts.
The flexible board is easily damaged
and should be
handledwith care.
NOÎESON LASERDIODE
EMISSION
CHECK
Thelaser
beam
on this
model
isconccntrated
so
as to be focused on the disc reflective surfaceby the
objective lens in the optical pick-up block. There-
fore, when checkingthe lasçrdiodeemission,
obserye
more than 25 cm awayfrom the objective
lens.
Flexible Circuit Board Repairing
o Keep the temperature of the soldering iron around
270oC during repairing.
a Do not touch the soldering iron on the same
conduc-
tor of the circuit board (within 3 times).
o Be careful not to apply force on the conductor when
solderingor unsoldering.
Noteson chip component replacement
o Neverreuse
a disconnected chip component.
o Notice that the minus side of a tantalum capacitor
may be damaged
by heat.
- SERVICING
NOTE
-
LASERDIODE
AND FOCUS
SERCH
OPERATION
CHECK
l. MakePOWER
switchon with no disc
inserted
and
disc
table
closed.
2. Confirm that the operation
indicated
in Fig. A is
performedwhile observing
theobjectinglens.
@ Cortir- thattser beamisspread.
@ Upanddown motion of theobjactiye
lens (3 timesl
Fig. A
FNONT SIDE
-5- -- -'t

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sEcTtoN
1
ADJUSTMENTS
ELECTR:CALADJUSTMENTS
l. Performadjustmentsin the order given.
2. UseYEDS-I8
(Part
No.:3-702-l0l{l) disc
unless
otherwise
indicated.
3. Usethe oscilloscope
with more than l0 MO im-
pedance.
a
o
o
,
RF PLL Frequency Adjurtment/Lod< Freguency
Gheck
Proccdruc:
flequancy counter
tftatn Doitfo l-=l
-lLll
rppcKl o---5-l
rp--J
tm
l. Connecttest
pointTP
(ASY)to ground
withlead
wue.
2. TurnPOWER
switchon.
3. Connect the frequency
counterto testpoint TP
(PCK).
4. Adjust RVl05 so that the reading
on frequency
counteris
4.3218MHz
+
30kHz.
(RF PLL frequency
adjustment)
5. Removelead wire connecting
TP (ASY) to
ground.
6. Put
disc
(YEDS-t
8)inand
press
> button.
7. Confirm that thereading
on frequencycounter
is
4.3218MHz.
Adjustmcnt
Location: mainboard
TP
A.G)
e
RVIOS e
TP (ASY)
COMPONENT SIDE (FRONT)
E-FBrlrnco Adjurtmcnt
This adjustmentshouldbe
Optical
pick-up
Block.
hoccdurc:
made when rcplacing
oscilloæopc
(DC nngêl
main bærd
TP(TEOI
l.
2-
3.
4.
5.
6.
Connecttest point TP (ADJ) and test point TP
(TE I) to ground
with leadwire.
Connectoscilloscope
to testpoint TP (TEO).
Turn POWER
switch on.
Putdisc
(YEDS-I8)in and
press
> button.
Adjust RVl0l so that the traversewaveform is
symmetrical
above
and
below.
After adjustment,
remove
thelead
wireconnected
in step
5. IA-g
(within 5%l
VOLT/D|V: , V
TIME/DIV: I ms
Adjustmcnt
Locetion: mainboard
TP (A.G)
-+
nvt0l
COMPONENT
SIDE (FRONTI
.tu -7-

cDP-68
/207ESD/75,0
Focur BiasAdjustment
This adjustment
should
Optical pick-upBlock.
hoccdurc:
be made when replacing
otcilloscope
(DC rangel
npin bærd
TPIBF)
fP (AFG)
l. Connect
oscilloscope
to test point TP (RF) and
test
point
TP
(RFG).
2. Turn POllrER
switch
on.
3. Putdisc
(YEDS-I8)in and
press
> button.
4. Adjust RVl02 for an optimumwaveform
eye
pat-
tern or so that the peakis maximum.Optimum
eyepattern
means
that shape" O,' canbeclearly
distinguished
at thecenterof the waveform.
EF signal waycform
A - t.2V x 0.2 (Vp-p)
Adjustment Location: main board
TP
(A.GI
-e-
TP
(RFI
COMPONENT
SIDE (FRONT)
FocusÆrack
ingGainAdiustment
A frequency response
analyzer
is necessary
in
orderto perform
this
adjustmentexactly.
However,
this gain has
a margin, so even
if it is Nolr
slightly off, thereis no problem. Therefore,do not
perform
this
adjustment.
Focus/trackinggain
determines
thepick-up
follow_
up (verticaland horizontal) relativeto mechanical
noiseand mechanical
shockwhen the 2.axis
device
operate.
However,asthese
reciprocate,
the
adjustrnent
is
at
the
point
where
both
aresatisfied.
o lVhen gain is raised,
the noisewhen the 2-axis
device
operates
increases.
a Whengain is lowered,it is more susceptible
to
mechanical
shock
andskipping
occurs
more
easily.
a lilhen
gain
adjustment
is
off, the
symptoms
below
appear.
2. lt
3.C
(r
4.4
ill
T
-si
l.
olc
Grin
SymptorË Focur Træking
oThetimeuntilmusic
ataris
becomes
longer
for STOP
+>PLÂY orautomatic
selection
(li{. }}lburtons
pressed.
(Normally
takes
about
2seconds.)
low lowor high
oMusicdoesnotstart
and
disc
continuesto rotate
for
STOP+DPLAY
or
automalic
selection
(
l(
)}l butrons
pressed.)
low
oDisc rableopens
shortly
AftCI
STOP+>PLAY. low or high
oSound
isinterrupted
dur-
ing
PLAY. Orlimecount-
er
display
stops
progress-
ing.
low
oMore
poise
during
2-axis
deviceoperation. high high
-8- af-u

following is
asimpleadjustment
method.
le Adjustment -
5.
6.
Connectoscilloscope
to mainboardTP(TEO).
Adjust RVl04 sothat thewaveform
isasshown
in
the figuç below.(tracking gain
adjustment)
Sinctexactadjustment
cannot
beperformed,
rcmem-
berthe positions
of thecontrols
before
performing
the
adjustment. lf the positions
after thesimple
adjust-
ment
arconly a little different,
returnthecontrols
to
the
original
position. oscillo*oge
VOLT/DIV: I V
TIME/DIV:2mS
(DC tengpl
npin bærd
TPtFEOt
OË--+C+
I
I
TP
(TEOI
æ- -t
o IncorrectExamples
(fundamental
wave
appears)
low trêcking grain
the sethorizontal. VOLT/DIV: t V
TIME/D|V: 2nS
-0v
the set is not horizontal,
this adjustment\
,not be performed due to the gravity
against
J
2 axisdevice. I
disc(YED$I8: Fifth Selection)
and press
PLAY button-
oscilloscope to main amp board TP
EO).
RVl03 so that the waveform is asshown VOLT/DIV: I V
TIME/DIV: 2 mS
the figure below. (focus gain adjustment)
VOLT/DIV: tOOmV
TIME/DIV: 2mS
-td)mV
-ov
-0v
t Examples
(DC level changes
more than Adjustment Location: main board
adjusted
waveform)
low focus goin TP
A.G)
e
TP
îEO) TP
(TEII
TP
(FE I1
TP RVtUI
(FEOI
BVI04
COMPONENTSIDE
IFRONT)
VOLT/DIV: tùO
mV
TIME/DIV: 2mS
- 25O
mv
-0v
VOLT/D|V: t0O
TIME/D|V: 2mS
- IOO
mV
-75 mV
_ov
high træking goin
(highar fundamental mve than for tow gain!

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cDP-68/207ESD
/750
Note:
. Colorcode
or sleevingover
the endof the iacket.
sEcTroN
2
DIAGRAMS 2.1. PRINTEDWIRI
(MAIN
BOARD
a
a
a
a
o- : parts
extracted
from the componentside
I : parts
mountedon the conductor
side.
i-i indicatessideidenrif
iedwith part number
o-1< : Jumperwire connected
to the groundpattern on
m the componentside.
f-o
H-5
t'z
J-7
H7
D-4
g-4
l-J
È- tb
D-4
o-4
È-o
D-3
c-3
ô- a
H-4
t-4
J-2
ô- z
ô-z
B-3
6-Z
B-3
c-?
c-2
D-3
u-J
o-3
t-
t4
t-14
r-
14
t-14
t-
l4
D
-6
o-5
D-6
D-6
u_o
L_D
u-f,
u-)
E_J
c-4
u-5
r-
t0
r-
10
H-10
r-
l4
l- 14
t-14
t- l4
r*9
rcl
rc2
tc3
tc4
tc5
tc6
rc7
rc8
tc9
rc10
rcrl
rc12
rc13
rct
0l
rc
102
rc201
ol
02
o3
o4
uf,
uo
o7
o8
o9
ot0
oll
at2
o13
o14
o15
o20
02r
o22
v<J
024
o601
o602
o603
o604
o605
D1
oz
n?
o4
D5
D6
D7
08
D9
010
Dll
o12
UIJ
014
D105
D
106
0601
0602
0603
0604
0605
D606
D607
0608
oEflB;
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cTs
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carTdF
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