Sony CDP-195 User manual

MICROFILM
CDP-199/299/491
SERVICE MANUAL
US Model
CDP-195/491
Canadian Model
AEP Model
E Model
CDP- 195/295
UK Model
. : CDP-491
‘Australian Model
CDP-295
Photo : CDP-295
Compact disc player
Frequency response
More than 100 dB
More than 97 dB
Less than 0.005%
More than 95 dB
Signal to noise ratio
Dynamic range
Harmonic distortion
Channel separation
Outputs
LINE OUT Output level 2 V (at
{phono jacks)
PHONES Output level max. 1
(stereo phone jack)
Load impedance over 10 kilohms
Load impedance 32 ohms
Model Name Using Similar Mechanism
CD Mechanism Type
Optical Pick-Up Block Type
CDP-291/391
CDM14-5BD1
BU-5BD1
SPECIFICATIONS
Supplied accessories
2Hz- 20 kHz + 0.5 dB
Audio cord 1
, (2 phono plugs - 2 phono plugs)
Remote commander (CDP-295/491) 1
R6(size AA) batteries {CDP-295/491} 2
AC plug adaptor
(for some areas) :
Remote commander RM-D295 (CDP-295/491)
Remote control
system
50 kilohms)
Infrared control
Omw
Power requirements 3 V DC with two R6 (size AA) batteries
Dimensions Approx. 40 x 20 x 175 mm (w/h/d)
General (19/4 "/isX 7 inches)
CDP-195/295/491 Weight Approx. 95 g (4 02)
Including batteries
Power Model for Continental Europe
requirements 220 ~ 230 V AC, 50/60 Hz
Model for Canada
120 V AC, 60 Hz
Model for Australia
240 V AC, 50 Hz
Model for other countries
1140, 120, 220 or 240 V AC,
50/60 Hz
Design and specifications subject to change without notice.
This Compact Disc player is
classified as a CLASS 1
LASER product.
adjustable,
CLASS 1 LASER PRODUCT
LUOKAN 1 LASERLAITE
Power
12W
consumption
The CLASS 1 LASER
PRODUCT label is located
KLASS 1 LASERAPPARAT
Dimensions 430 « 100 » 280 mm
(approx., including (w/h/d)
projections) (17X4>41'/e
inches)
on the rear exterior.
Weight (approx.) 3.5 kg (7 Ibs 12 oz)
COMPACT DISC PLAYER
SONY.

CDP-195/295/491
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK “AX OR DOTTED LINE
WITH MARK AX 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.
ATTENTION AU COMPOSANT AYANT RAPPORT
A LA SECURITE!
LES COMPOSANTS IDENTIFIES PAR UNE MARQUE A SUR
LES DIAGRAMMES SCHEMATIQUES ET LA LISTE DES
PIECES SONT CRITIQUES POUR LA SECURITE DE FONC-
TiIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR
DES PIECES SONY DONT LES NUMEROS SONT DONNES
DANS CE MANUEL OU DANS LES SUPPLEMENTS PUBLIES
PAR SONY.
PROTECTION
OF
EYES
FROM
LASER
BEAM
DURING
SERVICING
This set employs a laser. Therefore, be sure to follow carefully the
instructions below when servicing.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous
radiation exposure.
NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR
BASE UNIT
The laser diode in the optical pick-up block may suffer electrostatic
breakdown because of the potential difference generated by the
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic breakdown and also use
the procedure in the printed matter which is included in the repair
parts.
The flexible board is easily damaged and should be handled with
care.
1. Laser Diode Properties
* Material: GaAiAs
* Wavelength: 780nm
¢ Emission Duration: continuous
* Laser Output: max.44.6uW*
* This output is the value measured at a distance of about
200mm from the objective lens surface on the Optical Pick-up
Block.
2. 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 (including laser diode), replace the entire Optical Pick-
up Block (including APC borad).
TABLE OF CONTENTS
Section Title Page Section Title Page
Whee SGENERAL vecccecceteicsececnsnntei dace seniue catestinacss 4 4-2. Block Diagrarm oo... eseesteseenesseaeesenees 10
Location of Controls ..........cccccsccssseeeesteesessteseceseneerees 4 4-3. WaAVETOIMS .....ceeeeecccteesessessentesenscnstavsesecsseeeseatens 13
4-4. Printing Wiring Boards ..........cccsesesesereeseeees 14
2.
ELECTRICAL
BLOCK
CHECKING
...............
5
4-5.
Schematic
GiaQram
.........eceeececeeseeesesseeeneeees
17
4-6. Semiconductor Lead Layouts «0.0... eee 21
4-7. IC Block Diagrams oo... ceseseesseeeesesaeseeens 22
3. DISASSEMBLY OF BASE UNIT...................: 7
5. EXPLODED VIEWS. ........cc:scsccetcsseetnssecssneneenes 24
4) DIAGRAMS wiiciectevceccsnsstonctacncneAcruecstacsceneets 8
i Sener rn ete eee : 6. ELECTRICAL PARTS LIST oecsssssscssssssuneen 28

MODEL IDENTIFICATION
~ SPECIFICATION LABEL -
CDP-195
CDP-295
CDP-491
SONY.
MODEL
NO.
CHUA
LLL
SERIAL NO.
MADE IN JAPAN
US,
Canadian
MODEL:
AC120,
60Hz
12W
AEP
MODEL:
AC220-230V,
50/60Hz
Australian
MODEL:
AC240V,
50/60Hz
E,
Saudi
Arabian
MODEL:
AC110-120,
220-240V,
50/60Hz,
12W
SAFETY CHECK-OUT
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
instruments.
2.
A
battery-operated
AC
milliammeter.
The
Data
Precision
245
digital
multimeter
is
suitable
for
this
job.
CDP-195/295/491
CDP-195
CDP-295
CDP-491
SONY.
MODEL
NO.
LLLLLL
MLL
SERIAL NO.
MADE IN FRANCE
AEP MODEL: AC220-230V, 50/60Hz
UK MODEL: AC240V, 50/60Hz
3.
Measuring
the
voltage
drop
across
a
resistor
by
means
of
a
VOM
or
battery-operated
AC
voltmeter.
The
"limit"
indica-
tion
is
0.75V,
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
(0.75 V)
= Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.

CDP-195/295/491
SECTION 1
GENERAL
LOCATION OF CONTROLS
This section is extracted from
instruction manual.
CDP-295
[1] POWER switch
[2] Disc tray
Remote sensor
[41] Display window
[5 } PROGRAM button
CHECK (program check) button
Numeric buttons
CLEAR (program clear) button
>12 (over 12) button
MUSIC SCAN button
PEAK SEARCH button
PHONE LEVEL control
FADER button
PHONES jack
REPEAT button
EDIT/TIME FADE button
He-¢ </P> PPI (AMS */RMS** /manual search) buttons
lf (stop) button
18 (pause) button
> (play) button
& (open/close) button
Jelke|
+ =e
RBS Bee ele Ele
* AMS is the abbreviation of Automatic Music Sensor.
** RMS is the abbreviation of Random Music Sensor.

SECTION 2
CDP-195/295/491
ELECTRICAL BLOCK CHECKING
Note:
1.
CD
Block
basically
constructed
to
operate
with-
out
adjustment.
Therefore,
check
each
item
in
order
given.
2.
Use
YEDS-18
disc
(3-702-101-01)
unless
otherwise
indicated.
3.
Use
the
oscilloscope
with
more
than
1OMQ
im-
pedance.
4.
Clean
an
object
lens
by
an
applicator
with
neutral
detergent
when
the
signal
level
is
low
than
specified value with the following checks.
S Curve Check
oscilloscope
BD board
rene,
TP (FEO) o~w——o}
TP(VC) ow—lo-
Procedure :
1. Connect oscilloscope to test point TP (FEO) on
BD board.
2. Connect between test point TP (FES) and TP
(VC) by lead wire.
3. Turned Power switch on and actuate the focus
serch. (actuate the focus serch when disc table is
moving in and out.)
4. Check the oscilloscope waveform (S curve) is
symmetrical between A and B. And confirm peak
to peak level within 341Vp-p.
S
curve
waveform
symmetry
within 3+1Vp-p
5. After check, remove the lead wire connected in
step 2.
Note: * Try to mesure several times to make sure
that the ratio of A: B or B: A is more than
10:7.
» Take sweep time as long as possible and light
up the brightness to obtain best waveform.
RF Level Check
oscilloscope
TP (RFO) OO
TP (VC) sea (ek
Procedure :
1.
Connect
oscilloscope
to
test
point
TP
(RFO)
on
BD board.
2. Turn Power switch on.
3. Put disc (YEDS-18) in and playback.
4. Confirm that oscilloscope waveform is clear and
check RF signal level is correct or not.
Note:
Clear RF signal waveform means that the shape “©”
can be clearly distinguished at the center of the wave-
form.
VOLT/DIV : 200mv
TIME/DIV
:
$00nS
WR
WY
le
401000000004
$02)
COHAN
|
228%
vee
RF signal waveform
\) 909,
\N
AKA)
(WY
7,9
A)
Wy
NA
E-F Balance Check
oscilloscope
BD board
—)
TP (TEO) ot —0F
TP (VC) O=—0-
Procedure :
1. Connect test point TP (ADJ) to ground and TP
(TES) to TP (VC) with lead wire.
2. Connect oscilloscope to test point TP (TEO) on
BD board.
Turn Power switch on.
Put disc (YEDS-18) in and playback.
Confirm that the osilloscope waveform is sym-
metrical on the top and bottom in relation to OV,
and check this level.
symmetry
level : 21Vp-p
Traverse oscilloscope
ANY Uh
ov HA
tial
6. Remove the lead wire connected in step 1.

le D2 99) 2999/69"
RF PLL Free-run Frequency Check { BD BOARD |] - Component Side -
Procedure :
1. Connect frequency counter to test point (PLCK)
with lead wire.
f t
Main board requency counter
ita oe
TP (PLCK) oe
Turn Power switch on.
Confirm that reading on frequency counter is
4, 3218MHz.
Focus/Tracking Gain
This gain has a margin, so even if it is slightly off.
There is no problem.
Therefore, do not perform, this adjustment.
Please note that it should be fixed to mechanical cen-
ter position when you moved and do not know
original position.
Adjustment Location ;
{MAIN BOARD] - Component Side —
1C301
( conductor side ) 1€302
TP |
( PLCK )

SECTION 3
DISASSEMBLY
Note:
Follow
the
disassembly
procedure
in
the
nomerical
order
given.
@
Turn
the
cam
to
the
direction
of
arrow
(Counter
clock
wise)
by
minus
screw
driver.
Take off the disc table.
Remove the yoke bracket.
Remove
the
MD
(BU-5BD1)
to
the
direction
of
arrow.
oR)
CDP-195/295/491
4)

CDP-195/295/491
4-1.
SECTION 4
DIAGRAMS
PIN FUNCTION OF 1C101 AND IC401
@iCi01 (CXA1372Q) PIN FUNCTION
Prine | eneme [1/6 [pion
GND when two (+) dual power supplies are in use, or the center voltage (2.5V) when a
single power supply is in use.
Time constants for gain switching in normal mode/down mode and for focus gain are
conncted between the FGD and FS3 pins.
The capacitor for low frequency boost in the focus servo loop is connected.
Focus drive output.
Inverted input to focus amplifier.
Time constants to generate the focus search waveform are connected.
Time constants for gain switching in normal mode/up mode and for tracking gain are
wolalNa A) a [wl ve me ee et
connected between TGU pin and TG2 pin.
= Q
AVCC
|
Analog power supply (5V when + dual power supplies are in use, 5V when a single
power supply is in use.)
ett
oe tN
Tracking drive output.
Inverted input to tracking amplifier.
Non-inverted input to sled amplifier.
Sled drive output.
Non-inverted input to sled amplifier.
or ad
Oo on OD
tS Qo
ESET
ISET
AVEE
The 610k phase compensator resistor is connected to this pin.
The current setting resistor is connected to this pin.
a le Oe O The limit switch is connected to this pin.
Analog power supply (—5V when + dual power supplies are in use, or GND when a
single power supply is in use.)
Direct control pin.
NR NN me WN
CLK
Sled run-away prevention circuit operates when this signal is ”L”.
Serial data transfer clock input that is supplied from CPU (or DSP).
Latch input from CPU (or DSP).
Serial data input from CPU (or DSP).
System reset. ”L” to reset.
25 XRST
26 C.OUT
27 SENS
28 DGND =
Output to tracking counter.
SENS output.
Digital ground (GND). (GND when +
single power supply is in use.)
0 Oln sR me Ie
dual power supplies are in use. GND when a
Mirror output.
Defect output. "H” when defective.
29 | MIRR
30 _| DFCT
31‘ | ASY
32 | EFM
33. | FOK
34 CC2
35 __| col
Auto-assymmetry control input.
EFM comparator output.
Focus OK.
Defect-bottom-hold input (inout by capacitive coupling).
Defect-bottom-hold output.
w for)
Ba ww Ww oo fos
CB
cP
RF1
RFO
Digital power supply. (+5V when + dual power supplies in use. +5V when a single
power supply is in use.)
The defect-bottom-hold capacitor is connrcted to this pin.
The mirror hold capacitor is connected to this pin.
RF signal input (input by capacitive coupling).
RF signal input (input by DC coupling).
»
mn
—|—
Digital power supply (—5V when +
dual power supplies are in use. GND when a single
power supply is in use.)
— e-)
42 TZC Tracking zero-cross comparator input.
43 TE Tracking error input.
44 TDFCT The defect prevention hold capacitor is connected to this pin.
45 | ATSC Anti-shock input.
46 Focus zero-cross comparator input.
47
Focus error input.
The defect prevention hold capactior is connected to this pin.

CDP-195/295/421
© {C401 (CXP50112-697Q) PIN FUNCTION
Description
Not used (open).
Common output to FL tube.
Muting on by "H”, Muting off by ”L”.
55-58 | BO- B3 —~ | Not used (+5V)
Segment
output
to
FL
tube.
;
29
Subcode
sync
signal
SO
+
S1
detection
input
from
IC301
(CXD2500AQ).
30
Not
used
(open).
31
+5V
:
32
Reset
input.
33
+5V
34
Power
voltage
terminal
(+5V).
35-40
|
KEYO-
KEY5
I
|
Key
A/D
input.
41
=
—
|Not
used
(Ground).
7
42
TIMER
SW
1
|
Auto
play
select
input
(Auto
play
"L”).
43
=
—
{Not
used
(Ground).
44
CLK
O
|
Serial
data
transfer
clock
output
to
IC301
(CXD2500AQ).
45
DATA
QO
[Serial
data
output
to
1C301
(CXD2500AQ).
46
=
~
|
Not
used
(Ground).
pe
47
FOK
I
|
Focus
OK
signal
input
from
IC101
(CXA1372Q).
48
GFS
I
|
Frame
sync
signal
clock
status
input
from
IC301
(CXD2500AQ).
49
SUBQ
I
|
Sub
code
(Q
data)
serial
input
from
IC301
(CXD2500AQ).
50
SQCLK
QO
|
Sub
code
(Q
data)
readout
clock
output
to
IC301
(CXD2500AQ).
51
XLT
O
|
Serial
data
latch
output.
a
52
PRGL
O
|
Attenuate
data
latch
clock
output
to
1C302
(CXD2554P).
53
LDON
O
|
Laser diode
ON/OFF
select
output
of
optical
pick-up.
54
AMUT
O
|
Muting
output
for
IC301
(CXD2500AQ)
and
Q344
(2SC3399).
59
DEFECT
SW
O
|
Deffect
circuit
ON/OFF
select
output
to
IC101
(CXA1372Q).
60
- —
|
Not
used
(open).
61
SENSE
I
|
SENS
signal
input
from
IC301
(CXD2500AQ).
-
62
RMC
I
|
Remote
control
signal
input.
63
INSW
I
!
Input
for
loading
out
switch.
64
OUTSW
I
|
Output
for
loading
in
switch.
ADJ
I
|
Tset
mode
input.
GFS
check
will
not
activate
by
”L”.
AFADJ
I
|
Test
mode
input.
All
test
operation
will
be
activate
by
"L”
mode
when
power
ay
LODIN
O
|
Output
for
turn
the
loading
motor
to
loading.
LODOUT
O
|
Output
for
turn
the
loading
motor
to
un
loading.
Not used (open).
Not used (open).
Ground.
Clock output.
+5V
Clock input. (4MHz)
+5V
Power
voltage
—30V
for
built
in
FL
tube
controller.
Not
used
(open).
Not used (open).
Not used (open).
Not used (open).

4-6. SEMICONDUCTOR LEAD LAYOUTS
CXA13720
(TOP ViEW)
GP1U52XB
RD5.6ES-B2
RD6.8ES-B1
RD7.5JS-B2
ISS202-1
11ES2
11EQS04
[em catnede
anode
i
u
2SD774-34
CXD2500AQ
CXP50112-0970
IN4148M
r
anode
2SA1175-HFE
-?1-
CXD25520
'24345
2SB1094-L
2SB1274SA-RS
CD9-795/2.95/497
DTA1.4ES
DT014 4ES
23C02483-YGR
2E C262 3A-LK
2D4.7M-B1
o>
we
wa age
rd
| {k \
2SC1815-Y

4-7. IC BLOCK DIAGRAMS
1¢101 CXA13720
3 - os “ = > SE g 26 &
S a8 5 rd & ge Fo a $8 @
a o 8 2 rr 2 aS ra a 3 &
G)}— BHD) (32) (i) —GS)— oe (s)
cow ara] OMFAAATOR} BUEFER
DATA
eB 4? ¥W re XLT
cP oF
RFA
4
|
re)
clk
neo ne me Lock
(20) DIRC
(19) AVEE
DVEE (41)
TZC y y y y [cowPaRATOR} (1s) ssToP
@ i FS1-4 [email protected] TMI-7 PSI-3 b
Tal
Te @) DFCT T.GAIN
[
3
ae
o
UP/DOWN
TRACE
ING
[1°
set
}@2)
Iset
ToFCT (Ke Pv by, hg CoureN: (18) FSET
ase © ee acd aeee re 6
FSI é SERVO
Fz @) F Seance bo OS) tug ONZCHOP ©
: eGKIN pens ©) “ON ie Oa
FE (@”) DFCT _DOWN/NORMAL Ea o% ae Lo
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|
HOT
oe
Forct @) ess \) if § ‘ 192
FOCUS ES?) 1. GAIN (13) sL+
ON/OFF > eee UP/DOWN
5 Tuz
ir TRACK | NG| \ SLED
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8
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S 8 a2 3 og ow B36 8 2 o«
2 2 @ Bog gees ec
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10103 M54641L
et | REFERENCE
oe (2) OUT 2
1C201 M5293L
AMP. -_
(7) ouT 1
GND
REFERENCE
VOL TAGE
REFERENCE
VOLTAGE
(3) our
OVERCURRENT
LIMITTER

1c302 CXD2554P
1C202 M5290P-16
ATTENATOR
(9B) COUNTERD
PARALLEL ~ SERIAL
CONVERTER
US TH- ORDER
FIA
CALCULATION
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BUFFER RaW
Ram FOR
ue
FIR
NOISE SHAPER &
ANUTHMETIC CIRCUIT
ROUND OFF)
a
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IC305
CXD2552AQ
SCOR
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LOCK
OUT
(59)
MB2
NC
vss
VARI
ABLE
128FS
vcoo
Bea
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ae
vcol
CONTROL
C4M
vpD
TiMING
CIRCUIT
SYNC
VSUB
TEST2
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vss
TESTI
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a
FSTT
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=
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xouT
i—|
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PLM
|
NOISE
SHAPER
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APTL
vss
(i)
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MUTE
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FILI
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FA a ‘ AMAAAAGE
-~23-

CDP-195/295/491
NOTE:
+ ~-XX, -X mean standardized parts, so they
may have some differences from the original
one.
The construction parts of an assembled part
are indicated with a collation number in the
rernark column.
Color indication of Appearance Parts
Example:
KNOB,BALANCE(WHITE)...(RED)
T
Parts color Cabinet's color
(1) CABINET SECTION
2
not supplied
Canadian MODEL ~
EXCEPT US, —— E>
SECTION 5
EXPLODED VIEW
Items marked “*” are not stocked since they are
seldom required for routine service. Some de-
lay should be anticipated when ordering these
items.
* The mechanical parts with no reference num-
ber in the exploded views are not supplied.
Hardware(# mark) list is given in the last of this
parts list.
The components identified by mark A or
dotted line with mark A\ are critical for
safety.
Replace only with part number specified.
Les composants identifiés par une marque
A\ sont critiques pour la sécurité.
Ne les remplacer que par une piéce por-
tant le numéro spécifié.
supplied with J501
' AEP MODEL! E MODEL
| MODEL
‘US, Canadian 1
not supplied

11) CABINET SECTION
|
! |
ay SS | cas !
Jie 2,2 |
PD oO
pe ON LAE tS SR a EID i
| Australian 'US, Canadian |
+;
MODEL
4.
|MODEL
i
ENS |
|
!
|
a few
[not supplied
not supplied
~ not supplied
lin,
not supplied = #1 #1
EXCEPT US, ——! FLD401 supplied with RV501
Canadian MODEL supplied with J501
oo —

MD
SECTION
(CDM14-5BD1)
(2)
(including 315)

PICK-UP
BLOCK
(BU-5BD1)
(3)
oO
uy) oO
M102
(including ml