Sony CDP-497 User manual

CDP-497
SERVICE MANUAL US Model
Canadian Model
AEP Model
UK Model
EModel
Australian Model
Phote: AEP Model
Model Name Using Similar Mechanism CDP-295
CD Mechanism Type CDM14-5BD8A
Optical Pick-Up Block Type BU-5BD8A
SPECIFICATIONS
Compact disc player
Freqency response
Signal-to-noise ratio
Dynamic range
Harmonic distortion
Channel separation
2Hz to 20 kHz ±0.5 dB
More than 10OdB
More than 98 dB
Less than 0.0035%
More than 100 dB
Outputs
LINE OUT (FIXED) (phono jacks)
Output level 2V (at 50 kilo hms)
Load impedance over 10kilohms
LINE OUT (VARIABLE) (phono jack)
(only for the UK and AEP model)
Output level max. 2V (at 50 kilohms)
Load impedance over 50 kilohms
PHONES (stereo phone jack)
Output level max. 10mW
Load impedance 32 ohms
General
Power requirements AEP model:
220V -230V AC, 50/60Hz
UK, Australian model:
240V AC, 50/60 Hz
US, Canadian model:
120V AC, 60 Hz
Emodel:
110 -120V/220 -240V AC,
adjustable with the voltage selector,
50/60 Hz
Power consumption 12W
Dimensions (approx., including projections)
430 X100 X295 mm (w/h/d)
(17 X4XII 5/8 inches)
Weight (approx.) 3.5 kg (7 lbs 12oz)
Remote commander
(AEP, G, UK model: RM-D597
US, Canadian, E, Australian model: RM-D297)
Remote control system Infrared control
Power requirements 3V DC with two R6 (size AA) batteries
Dimensions (approx., including projections)
40 X20 X175 mm (w/h/d)
(1 5/8 X13/16 X7inches)
Weight (approx.) 95g (4oz)
Supplied accessories
Audio cord
Remote commander
R6 (AA) batteries
(1) (2 phono plugs -2phono plugs)
(1)
(2)
DesIgh and specifications are subject to change without notice.
COMPACT DISC PLAYER
MICROFILM

CDP-497
1. Laser Diode Properties TABLE OF CONTENTS
•Material: GaAlAs
•Wavelength: 780 nm
*Emission Duration: continuous Section Title Paae
1. GENERAL
For the United Kingdom and European countries
Identifying the Parts 4
CLASS 1LASER PRODUCT
LUOKAN 1LASERLAITE
KLA8S 1LASERAPPARAT
This Compact Disc player is
classified as a CLASS 1LASER
product. The CLASS 1LASER
PRODUCT label is located on
the rear exterior.
2. DISASSEMBLY
3. ELECTRICAL BLOCK CHECKING
4. DIAGRAMS
5
6
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK AOR DOTTED
LINE WITH MARK AON 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 PUB-
LISHED BY SONY.
ATTENTION AU COMPOSANT AYANT RAPPORT
ALA S^CURIT^I
LES COMPOSANTS IDENTIFIES PAR UNE MARQUE A
SUR LES DIAGRAMMES SCHEMATIOUES ET LA LISTE
DES pieces SONT CRITIQUES POUR LA sEcURITE
DE FONCTIONNEMENT. NE REMPLACER CES COM-
POSANTS QUE PAR DES PIECES SONY DONT LES
NUMErOS SONT DONNEs dans CE MANUEL OU
DANS LES supplements PUBLIEs PAR SONY.
4-1. Pin Functions 8
•IC101 (CXD2501Q) Pin Function *8
•IC301 (CXD2500AQ) Pin Function 10
4-2. Circuit Boards Location 12
4-3. Block Diagram 12
4-4. Printed Wiring Boards —Main Block —15
4-5. Schematic Diagrams —Main Block —19
4-6. Printed Wiring Boards —MD Block —22
4-7. Schematic Diagrams —MD Block— 23
4-8. Semiconductor Lead Layouts 23
4-9. 1C Block Diagrams 25
5. EXPLODED VIEWS
5-1. Cabinet Section 27
5-2. MD Section (CDM14-5BD8A) 29
5-3. Pick-up Block (BU-5BD8A) *30
6. ELECTRICAL PARTS LIST 31
-2

CDP-497
MODEL IDENTIFICATION
—SPECIFICATION LABEL —
SONY® MODEL NO. CDP-497
COMPACT DISC PLAYER
SERIAL NO.
MADE IN JAPAN
US, Canadian MODEL AC:120V 60Hz 12W
AEP MODEL AC:220-230V~ 50/60Hz
Australian MODEL: AC;240V~ 50/60HZ
EMODEL AC:1 10-120, 220-240V~
50/eOHz 12W
SONY® MODEL NO. CDP-497
COMPACT DISC PLAYER
V////////////77?7/
SERIAL NO.
MADE IN FRANCE ^
AEP MODEL AC:220-230V~ 50/60HZ
UK MODEL AC:240V~ 50/60Hz
SAFETY CHECK-OUT
After correcting the original service problem,
perform the following safty 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 part to any
exposed metal part having areturn to chassis, must
not exceed 0.5 mA (500 microampers). Leakage
current can be measured by any one of three
methods.
1. Acommercial leakage tester, such as the
Simpson 229 or RCA WT-540A. Follow the
manufacturers’ instructions to use these instru-
ments.
2. Abattery-operated AC milliammeter. The Data
Precision 245 digital multimeter is suitable for
this job.
3. Measuring the voltage drop across aresistor by
means of aVOM or battery-operated AC 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 examples of apassive VOM that
is suitable. Nearly all battery operated digital
multimeters that have a2V AC range are
suitable. (See Fig. A)
To Exposed Metal
Parts on Set
AC
voltmeter
(0.75V)
0.15 fiF ^1.5 kQ
—Earth Ground
Fig. A. Using an AC voltmeter to check AC leakege.
-3-

CDP-497 SECTION 1
GENERAL
Identifying the
Parts
Front Panel
\T\ POWER switch
[g Disc tray
Display window
[4] (stop) button
[g /(manual search) buttons
[e] Play mode buttons
CONTINUE button
SHUFFLE button
PROGRAM button
0CHECK (program check) button
[8] Numeric buttons
[9] EDIT/TIME FADE button
Qo| TIME SET button
[Tj] >12(over 12) button
nH LINE OUT/PHONE LEVEL control
(for the model for the United Kingdom
and European countries)
PHONE LEVEL control
(for the model for other countries)
dAUTO SPACE/AUTO CUE button
dPHONES jack
on PEAK SEARCH button
dCLEAR (program clear) button
Qt] music scan button
on FADER button
dREPEAT button
dTIME button
ig l/^(AMS*) buttons
dll (pause) button
d(play) button
d±OPEN/CLOSE button
*AMS is the abbreviation of Automatic
Music Sensor.
-4-

SECTION 2
DISASSEMBLY
Note: Fellow the disassemby procedure in the numerical order
given.
OTurn the cam to the direction of arrow (Counter clock
wise) by minus screw driver.
OTake off the disc table,
0Remove the yoke bracket.
ORemove the MD (BU-5BD8A) to the direction of arrow.
-5-

CDP-497 SECTION 3
ELECTRICAL BLOCK CHECKING
Note:
1. CD Block basically constructed to operate without
adjustment.Therefore, check each item in order given,
2. Use YDES-18 disc (3-702-101-01) unless otherwise
indicated.
3. Use the oscilloscope with more than lOMQ inpedance,
4. Clean an object lens by an applicator with neutral detergent
with the signal level is low than specified value with the
following checks.
SCurve Check
BD board
oscilloscope
{TP (FE) o
TP (VC) o-
RF Level Check
BD board {
oscilloscope
TP (RFC) o-
TP (VC) o
Procedure:
1. Connect oscilloscope to test point TP (RFO) on BD board.
2. Ture 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 “O”can be
clearly distinguished at the center of the waveform.
Procedure:
1.Connect oscilloscope to test point TP (FE) on BD board.
2. Connect between test point TP (FEI) and TP (VC) by lead
wire.
3. Tured 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 Aand B. And confirm peak to peak level within 3 ±
1Vp-p.
,VOLT/DIV: 200 mV
RF signal waveform TIME/DIV: 500 nS
Scurve waveform symmetry
5.
After check, remove the lead wire connected in step 2.
Note: •Try to measure 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.
E-F Balance Check
oscilloscope
BD board {TP (TE)
TP (VC) o- o
Procedure:
1. Connect test point TP (ADJ) to ground and TP (TEI) to TP
(VC) with lead wire.
2. Connect oscilloscope to test point TP (TE) on BD board.
3. Turn Power switch on.
4. Put disc (YEDS-18) in and playback.
5. Confirm that the oscilloscope waveform is symmetrical on
the top and bottom in relation to OV, and check this level.
Treverse oscilloscope symmetry
-6-

CDP-497 SECTION 4
DIAGRAMS
4-1. PIN FUNCTIONS
•IC101 (CXD2501Q) PIN FUNCTION
I/O Function
ADII IA/D signal input.
2ADIO 0Analog switch output.
3RF IRF signal input.
4TE ITracking error signal input.
5SE ISE signal input.
6NC Not used.
7FE IFocus error signal input.
8VC nCenter voltage (2.5V) input.
9DVSS Digital GND.
10 NC
Not used.
11 ATSK
12 NC
13 DFSW IPrevents the DFCT circuit from operating at “H”.
14 DFCT 0DFCT signal output.
15 XTAL IMaster clock signal input.
16 NC Not used.
17 XTSL Frequency switching of input master clock signal. 22 MHz at “H”. 1 1 MHz at “L”.
18 UOCK ILock signal input.
19 FOK 0Focus OK signal output.
20 MIRR 0Mirror signal output.
21 CLK IClock signal when transmitting data from micro processor.
22 NC Not used.
23 ILatch signal when transmitting data from micro processor.
24 IData from micro processor.
25 1^^3111 0Track jump number count signal output.
26 Not used.
DVdd Digital +5V. -
NC Not used.
[fiQm SENS 0SENS signal output.
SCLK ISerial data reading clock.
31 NC Not used.
32 DIRC IDIRC signal input.
33 XRST IReset signal input.
34 SOCK
Not used.
35 XOLT
36 SOUT
37 NC
SFDR 0Sled drive signal output (FWD).
39 SRON Not used.
40 SRDR 0Sled drive signal output (REVERSE).
41 SFON Not used.
42 NC
43 DVSS Digital GND.
44 NC Not used.

CDP-497
RF PLL Free-run Frequency Check
Procedure:
1. Connect frequency counter to test point (PLCK) with lead
wire.
frequency counter
^—'
3. Confirm that reading on frequency counter is 4.3218 MHz.
Focus/Tracking Gain
This gain has amargin, 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 center position
when you moved and do not know original position.
Main board
TP'^PL^)
2. Turn Power switch on.

CDP-497
Pin No. Pin Name I/O Function
45 TEST Fixed at “L”.
46 NC Not used.
47 TRDF 0Tracking drive signal output (FWD).
48 TRON Not used.
49 TRDR 0Tracking drive signal output (REVERSE).
50 TFON Not used.
51 FFDR 0Focus drive signal output (FWD).
FRON Not used.
FRDR 0Focus drive signal output (REVERSE).
mm FFON Not used.
55 NC
56 SSTP ILimit switch detection.
57 NC Not used.
CDS IUsed at “H”.
59 NC Not used.
60 DVdd Digital +5V.
61 AVdd Analog +5V.
62 IGEN Input for the ope-amp current supply.
63 NC Not used.
64 AVSS Analog GND.
-9

CDP-497
•IC301 (CXD2500QA) PIN FUNCTION
Pin No. IPin Name II/O Function
Focus OK input pin. Used for SENS output and servo auto sequencer.
Spindle motor output filter switching output.
Spindle motor ON-OFF control output.
Spindle motor servo control.
Spindle motor servo control.
Samples GFS at 460 Hz, and outputs Hwhen GFS is H. Outputs Lif Lcontinues eight times.
Oscillation circuit output for analog EFM PLL.
Oscillation circuit input for analog EFM PLL. fLOCK=8,6436 MHz.
TEST pin. Normally GND.
Charge pump output for analog EFM and PLL.
PLL charge pump output for variable pitch.
Clock input from the external VCO for variable pitch. fCcenter=l 6.9344 MHz.
Filter output for master PLL (Slave=Digital PLL).
Filter input for master PLL.
PLL charge pump output for master PLL.
Analog GND
Master VCO control voltage input.
Analog power supply (+5V)
EFM signal input.
Asymmetry circuit regulated current input.
Asymmetry comparative voltage input.
EFM full swing output (L=Vss, H=Vdd)
LrAsymmetiy circuit OFF HrAsymmetry circuit ON.
Not used.
Audio data output mode switching input. Serial output at L, parallel output at H.
D/A interface for 48 bit slot. Word-clock f=2Fs.
D/A interface for 48 bit slot. LR clock f=Fs.
Power supply (+5V).
DA16 (MSB) output when PSSL=1
.
48 bit slot serial data when PSSL=0 (2s’COMP, MSB first).
DA15 output when PSSL=1. 48 bit slot bit clock when PSSL=0.
DA14 output when PSSL=1.
64 bit slot serial data when PSSL=0 (2s* COMP, LSB first)
DA13 output when PSSL=1. 64 bit slot bit clock when PSSL=0.
DA12 output when PSSL=1. 64 bit slot LR clock when PSSL=0.
DAI 1output when PSSL=1. GTOP output when PSSL=0.
DA10 output when PSSL=1. XUGF output when PSSL=0.
DA09 output when PSSL=1. XPLCK output when PSSL=0.
DAOS output when PSSL=1 .GFS output when PSSL=0.
DA07 output when PSSL=1 .RFCK output when PSSL=0.
DA06 output when PSSL=1 .C2P0 output when PSSL=0.
DAOS output when PSSL=1. XRAOF output when PSSL=0.
-10 -