Sony CDP-CX53 - CD Changer User manual

MICROFILM
SERVICE MANUAL
COMPACT DISC PLAYER
US Model
Canadian Model
AEP Model
E Model
Australian Model
Compact disc player
Laser Semiconductor laser (λ= 780 nm)
Emission duration: continuous
Laser output Max 44.6 µW*
* This output is the value measured at
a distance of 200 mm from the
objective lens surface on the
Optical Pick-up block with 7 mm
aperture.
Frequency reponse 2 Hz to 20 kHz ± 1dB
Signal-to-noise ratio More than 100 dB
Dynamic range More than 88 dB
Harmonic distortion Less than 0.013%
Channel separation More than 95 dB
Output
SPECIFICATIONS
CDP-CX53
Model Name Using Similar Mechanism CDP-CX50/CX571
CD Mechanism Type CDM-46C2
Base Unit Type KSM-213BFN/M-NP
Optical Pick-up Type KSS-213B/S-N
Jack Maximum Load impedance
type output
level
LINE OUT Phono 2V Over 10 kilohms
Jacks (at 50 kilohms)
DIGITAL Optical –18 dBm Wave length: 660 nm
OUT output
(OPTICAL) connector
Where purchased Power requirements
USA/Canada 120 V AC, 60 Hz
Australia 240 V AC, 50 Hz
Europe 220 V – 230 V AC, 50/60 Hz
Other countries 110 V – 120 V or 220V – 240 V AC,
adjustable, 50/60 Hz
General
Power requirements
Power consumption 12 W
Dimensions (approx.) When the front cover is closed
(w/h/d) 430 ×182.5 ×295 mm (17 ×7 1/4 ×11 5/8 in.)
incl. projecting parts
When the front cover is open
430 ×182.5 ×414 mm (17 ×7 1/4 ×16 3/8 in.)
incl. projecting parts
Mass (approx.) 5.2 kg (11 lbs 8 oz)
Supplied accessories
Audio cord (2 phono plugs – 2 phono plugs) (1)
CONTROL A1 cord (supplied for Canadian models only) (1)
Remote commander (remote) (1)
Sony SUM-3 (NS) batteries (2)
CD booklet holder (1)
Label (1)
Design and specifications are subject to change without notice.

– 2 –
TABLE OF CONTENTS
1. SERVICING NOTE .................................................. 3
2. GENERAL ................................................................... 4
3. DISASSEMBLY ......................................................... 5
4. TEST MODE.............................................................. 9
5. MECHANICAL ADJUSTMENTS ....................... 12
6. ELECTRICAL ADJUSTMENTS......................... 15
7. DIAGRAMS ................................................................. 17
7-1. Printed Wiring Board – BD Section – ........................... 19
7-2. Schematic Diagram – BD Section – ............................... 21
7-3. Printed Wiring Board – Audio Section –....................... 23
7-4. Schematic Diagram – Audio Section –.......................... 25
7-5. Printed Wiring Boards – Panel Section – ...................... 27
7-6. Schematic Diagram – Panel Section – .......................... 29
7-7. Printed Wiring Board – Sensor/Motor Section – .......... 31
7-8. Schematic Diagram – Sensor/Motor Section – ............. 33
7-9. IC Pin Function Description ........................................... 37
8. EXPLODED VIEWS ................................................ 43
9. ELECTRICAL PARTS LIST ............................... 49
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous
radiation exposure.
The laser component in this product
is capable of emitting radiation
exceeding the limit for Class 1.
This appliance is classified as
a CLASS 1 LASER product.
The CLASS 1 LASER
PRODUCT MARKING is
located on the rear exterior.
4-997-124-01
4-997-124-11
4-997-124-21
4-997-124-31
4-997-124-41
4-997-124-51
US model
Canadian model
AEP, AED model
Australian model
E model
Singapore model
PARTS No. MODEL
MODEL IDENTIFICATION
— BACK PANEL —
• Abbreviation
AED: North Europe
PARTS No.
CAUTION : INVISIBLE LASER RADIATION WHEN OPEN AND
INTERLOCKS DEFEATED. AVOID EXPOSURE TO BEAM.
ADVARSEL : USYNLIG LASERSTRÅLING VED ÅBNING NÅR
SIKKERHEDSAFBRYDERE ER UDE AF FUNKTION. UNDGÅ UDSAETTELSE
FOR STRÅLING.
VORSICHT : UNSICHTBARE LASERSTRAHLUNG, WENN
ABDECKUNG GEÖFFNET UND SICHEREITSVERRIEGELUNG
ÜBERBRÜCKT. NICHT DEM STRAHL AUSSETZEN.
VARO ! : AVATTAESSA JA SUOJALUKITUS OHITETTAESSA OLET ALT-
TIINA NÄKYMÄTTÖMÄLLE LASERSÄTEILYLLE. ÄLÄ KATSO SÄTEESEEN.
VARNING : OSYNLING LASERSTRÅLING NÄR DENNA DEL ÄR ÖPPNAD
OCH SPÄRREN ÄR URKOPPLAD.BETRAKTA EJ STRÅLEN.
ADVERSEL : USYNLIG LASERSTRÅLING NÅR DEKSEL ÅPNES OG
SIKKERHEDSLÅS BRYTES. UNNGÅ EKSPONERING FOR STRÅLEN.
VIGYAZAT ! : A BURKOLAT NYITÁSAKOR LÁTHATATLAN LÉZERSU-
GÁRVESZÉLY
! KERÜLJE A BESUGÁRZÁST !
(Except for the customers in the United States and
Canada)
The following caution label is located inside the unit.

– 3 –
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE !
SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE
DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ
DE FONCTIONNEMENT. NE REMPLACER CES COM-
POSANTS QUE PAR DES PIÈCES SONY DONT LES
NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK !OR DOTTED
LINE WITH MARK !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 PUB-
LISHED BY SONY.
SAFETY CHECK-OUT
After correcting the original service problem, perform the follow-
ing 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
TheAC 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 0.5 mA (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-operatedAC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of a
VOM or battery-operated AC voltmeter. The “limit” indica-
tion is 0.75 V, so analog meters must have an accurate low-
voltage scale. The Simpson 250 and Sanwa SH-63Trd are ex-
amples of a passive VOM that is suitable. Nearly all battery
operated digital multimeters that have a 2VAC range are suit-
able. (See Fig. A)
Fig. A. Using an AC voltmeter to check AC leakage.
1.5 k Ω 0.15 µ FAC
voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
SECTION 1
SERVICING NOTES
The laser diode in the optical pick-up block may suffer electro-
static break-down because of the potential difference generated
by the charged electrostatic 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 is included in the
repair parts.
The flexible board is easily damaged and should be handled with
care.
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. Therefore, when checking the laser diode emis-
sion, observe from more than 30 cm away from the objective lens.
LASER DIODE AND FOCUS SEARCH OPERATION
CHECK
Carry out the “S curve check” in ”CD section adjustment” and
check that the S curve waveform is output repeatedly.
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT

– 4 –
SECTION 2
GENERAL
This section is extracted from
instruction manual.
1I/u(power switch) button
2Front cover
3PLAY MODE button
4REPEAT button
5Display window
6BLOCK 1-5 buttons
7DISC PUSH ENTER knob
PUSH
OPEN
STANDBY
I/u
PULS ONE
PLAY MODE REPEAT BLOCK FILE 1 2 3
BLOCK 4 5 CHECK CLEAR
PUSH ENTER
DISC
ª
Pp ± ±
123
45 6 7
8
9
0!¡!™!£
!¢
!∞
LOCATION OF PARTS AND CONTROLS
Front Panel
8CHECK button
9CLEAR button
!º ±button
!¡ ≠button
!™ pbutton
!£ Pbutton
!¢ ·button
!∞ PLUS ONE button

– 5 –
CASE, FRONT PANEL
Note: Follow the disassembly procedure in the numerical order given.
SECTION 3
DISASSEMBLY
1 two screws
(M3 × 8)
1 two screws
(M3 × 8)
4 screw
(BVTT3 × 6)
3 two screws
(BVTT3 × 6)
8 three screws
(BVTT3 × 6)
5 connector
(CN803)
6 wire (flat type) (15 core
)
(CN801)
7 wire (flat type) (9 core)
(CN103)
2 case
9 claw
9 claw
0 front panel
1 two screws
(M3 × 8)
5 table (50)
4 screw
(PTPWH2.6
× 8)
1 screw
(BVTT3
× 6)
2 connector
(CN84)
3 bracket
(ILLUMINATION)
TABLE (50)

– 6 –
CD MECHANISM DECK SECTION
AUDIO BOARD
5 two screws
(BVTT3
× 10)
3 two screws
(BVTP3
× 8)
2 reinforcement
5 screw
(BVTT3
× 6)
9 screw
(BVTT3
× 8)
1 screw
(BVTT3
× 6)
9 screw
(P3
× 14)
6 connector
(CN53)
!¡ connector
(CN61)
0 connector
(CN51)
7 wire (flat type) (12 core)
(CN102)
!™ base (CDM)
4 ring (B)
8 base (LOADING)
6 two screws
(BVTT3 × 6)
1 two screws
4 transformer cover
9 AUDIO board
3 two screws
(BVTT3 × 6)
1 screw
(BVTP3 × 8)
8 connector
(CN701)
2 ring (A)
5 screw
(BVTT3 × 6)
7 three screws
(BVTP3 × 10)

– 7 –
BASE UNIT
BD BOARD, SLED MOTOR (M102)
1 two screws
(BTP2.6
× 8)
6 four screws
(PTPWH2.6
× 8
)
3 screw
(BTP2.6
× 10)
2 bracket
4 reinforcement (small)
5 two tention springs
7 base unit
1 wire (flat type) (16 core)
(CN101)
8 gear cover
2 screw
(B2 × 5)
7 three claws
4 BD board
3 Removal
four solders.
!¡ sled motor
(M102)
0 two screws
(2 × 3)
5 claw
9 gear (B) (RP)
6 gear (A) (S)

– 8 –
OPTICAL PICK-UP (KSS-213B/S-N)
3 Remove the optical
pick-up to direction
of the arrow A .
A
1 claw
2 sled shaft

– 9 –
SECTION 4
TEST MODE
DISPLAY CHECK MODE
Note:
This will not work properly if the DISC is set to any slit.
1. Press the I/ubutton, turn ON the power, and set a CD in any
slit.
2. Press the I/ubutton, and turn OFF the power.
3. While pressing the [CHECK] and [PLUSONE] buttons to-
gether with the power OFF, press the I/ubutton and turn ON
the power.
4. All the segments of the fluorescent indicator tube light up, and
the ·, P, and [PLUSONE] LEDs light up.
5. To exit the display check mode, press the I/ubutton.
ADJ MODE
1. Press the I/ubutton to turn the power ON.
2. Open the front cover, and press the [PLUSONE] button.
3. Set the disc (YEDS-18 : 3-702-101-01) in the PLUS ONE slit.
4. Close the front cover, and chuck the disc.
5. Press the I/ubutton, and turn OFF the power.
6. Connect TP (ADJ) of the DISPLAY board and the ground with
a lead wire.
7. Press the I/ubutton and turn ON the power.
The ADJ mode is set with the above.
Differences with normal mode
• No high speed search is performed during access
• Ignored even if GFS becomes L
• Ignored even if Q data cannot be read
• Spindle servo gain is set to 12 cm mode (Even with 8 cm disc)
The following special functions will work when certain functions
are pressed in this mode.
Special functions in ADJ mode
(The ( ) buttons function only with the general purpose remote.)
Button Function
(3) Tracking servo, sled servo OFF
(8) Tracking servo, sled servo ON
CHECK S shape observation mode
FLUORESCENT INDICATOR TUBE, LED ALL LIT,
AND KEY CHECK MODE
Connect TP (AFADJ) and ground of the DISPLAY board with a
lead wire.
When a button is pressed, the left side of the indicator tube will
show how many buttons have been pressed so far.
(However, buttons already pressed once will not be counted.)
The right side will show the numbers corresponding to the pressed
buttons.
[ DISPLAY BOARD ] — CONDUCTOR SIDE —
Buttons and Corresponding Button Numbers
Button Button Number or Display
CLEAR 0
CHECK 1
DISC 2
PUSH ENTER
±8
≠9
REPEAT 14
PLAY MODE 15
BLOCK 5 16
BLOCK 4 17
BLOCK 3 18
BLOCK 2 19
BLOCK 1 20
I/u21
PLUS ONE While the button is pressed, LED (D803) lights up.
·While the button is pressed, LED (D801) lights, and
the whole fluorescent indicator tube lights up.
The fluorescent indicator tube (segment check)
Pis partially lit and LED near by (D802) is lit while
pressed.
pThe fluorescent indicator tube is partially lit while
pressed (grid check).
CNP801
IC801
CNP804 TP(AFADJ)
TP(ADJ)
1 DISC
CD 1
**
**
2
Count up Button number

– 10 –
Sequence of Aging Mode
$
$
$
$
$
$
$
$
$
Order of Disc Change
(1 cycle takes 3 minutes)
$
$
$
1. No. 51
2. No. 20
3. No. 40
4. No. 30
5. No. 10
6. No. 40*
$
$
$
$
* DISC No. 40 chucks twice during one cycle.
To differentiate, the “[2]” on the block indicator of the fluores-
cent indicator tube will light up during the second chucking.
1. Disc change
2. Load in
3. TOC read
4. Access of last track
5. 3 second playback
6. Access of first track
7. 3 second playback
8. Load out
1. Grid check
2. Segment check
Key Inputs Other than Buttons and How to Display
Key input Display
Rotate the JOG knob to Fluorescent indicator tube block indicator
the right lights up in the order of 1 n2 n3 n4 n
5 n1 n·····.
Rotate the JOG knob to Fluorescent indicator tube block indicator
the left lights up in the order of 5 n4 n3 n2 n
1n5 n·····.
Press the JOG knob Displays button number 2
(ENTER)
Door cover “Close” [STANDBY] LED goes OFF
Door cover “Open” [STANDBY] LED lights up
AGING MODE
• Mode which repeatedly changes and plays back discs automati-
cally in the unit.
• It will repeat aging as long as no errors occur.
• If an error occurs during aging, it will stop all servos, motors,
etc. instantaneously, display the error number, and stop opera-
tions. However, the stopping conditions differ according to
whether the unit is equipped with the “self-protection function
during errors” described later.
The function serves to maintain the state of the unit when errors
occur.
Special Functions in Aging Mode
There are some useful function in the aging mode.
• Disc setting mode*1
• Switching of use/disuse of protection function in errors *2
• Aging cycle count function *3
*1 Disc setting mode:
5 discs are set before setting the aging mode. This mode makes
the setting of these discs more easy.
*2 Switching of use/disuse of protection function in errors:
Function which voluntarily corrects errors which occur dur-
ing normal operations by retries.
If this function is not provided, all operations will be stopped
without retiring. It is suitable for checking errors with low re-
producibility.
If this function is provided, and errors can be corrected by
retries, aging will be continued without stopping.
(The normal aging should be performed with “be”.)
*3 Aging cycle count function:
Functions which displays the number of agings carried out on
the Fluorescent indicator tube in numbers. One aging cycle
consists of six discs.
1 DISC
CD 1
88
88 88
7
---
onn

Disc number Track number Agings carrried
(
1 n 2 n 3 n .....
)
DISC
51
TRACK
1
MIN SEC
0.01 *

– 11 –
Aging procedure:
Some operating method will be changed depending on if the fol-
lowing jig for the aging mode exists or not.
• Jig
Parts. No Description
J-2501-123-A Remote commander (For aging mode)
With remote commander for aging mode:
1. Turn ON the power of the unit. Open the front cover.
2. Press the [AGINGSTART] button of the remote commander
for aging mode.
3. When the disc set mode is set, the ·and PLEDs blink.
4. Rotate the JOG dial. The slits (No. 10, 20, 30, 40, 51) for set-
ting the discs will come forward. Insert the discs into these
slits. Do not set the discs in other slits.
5. Set the use/disuse of the self protection function in errors. Press
the [REPEAT] button.When REPEAT is displayed on the fluo-
rescent indicator tube, the self protection function during the
error will become “Use”.
If the REPEAT display is OFF, it means that the function is
not used. (Normally set to “Use” when performing aging.)
6. Press the ·button.
7. The ·LED blinks, the aging mode is set, and aging is
started.
8. The aging cycle lasts 3 minutes.When problems occur during
aging, the error number will be displayed on the fluorescent
indicator tube, and the PLED will light up.
(Refer to the following table for the details of the errors.)
9. Aging will be repeated as long as no errors occur.
10. After each aging cycle, the number displayed on the Fluores-
cent indicator tube will increase.
11. To end aging, press the I/ubutton
Error Display
Error code
Without remote commander for aging mode:
1. Turn ON the power of the unit. Open the front cover.
2. Press the [PLAYMODE], ·, and ≠buttons in order.
3. When the disc set mode is set, the ·and PLEDs blink.
The following procedure is the same as in the case “With remote
commander for aging mode”.
Code number Name Contents
Err 01 DISC sensor check 1 No disc in the specified slit
Err 02 DISC sensor check 2 Disc in other slits
Err 03 No function
Err 04 Table operation check 2 No table sensor input
Err 05 Loading operation check 1 Load in timeover
Err 06 Loading operation check 2 Load out timeover
Err *1 BU related check 1 Access timeover
Err *2 BU related check 2 High speed search NG
Err *3 BU related check 3 Q data read error
Err *4 BU related check 4 BU operation (From focus search to until signal can be read) timeover
Err *5 BU related check 5 GFS monitor error
Err *6 BU related check 6 Focus cannot be imposed by focus search
The * numbers mean the following according to the state of the unit during aging
2 : From checking to end of TOC read
3 : From end of TOC read to end of last track playback
4 : From end of last track playback to end of first track playback
Disc number Error code number of agings
(
1 n 2 n 3 n .....
)
DISC
51 26 Err *

– 12 –
SECTION 5
MECHANICAL ADJUSTMENTS
To adjust the mechanism section, enter the mechanism section adjustment mode.
For how to enter the mechanism section adjustment mode, refer to each adjustment section.
DISC SENSOR ALIGMENT
1. Make sure that there is no disc in the unit.
2. Connect an oscilloscope to TP501 of the AUDIO board.
3. While pressing the [CLEAR] and [PLUSONE] buttons at the same time and turn ON the power.
4. The fluorescent indicator tube shows as follows, and the mechanism section adjustment mode is set.
5. The disc table rotates in the clockwise direction.The disc table rotation time is displayed with “PLUS ONE” slit as a measuring point.
6. Measure the waveform of the oscilloscope when the disc table is rotating.
oscilloscope
SENS (CH1)
TEST (CH2)
GND
SENS
GND
TEST
AUDIO board
TP501
POWER switch
PLUS ONE button
CHECK button
CLEAR button
± button
≠ button
11111
3.6
ALL DISCS
DISC SEC
CD1
* *
Rotation time
Lit according to rotational direction
DISC No.
PLUS ONE

– 13 –
7. Move the holder (sensor) center so that the flat portion center at the top of the SENS (CH1) input waveform and the ‘’H” center of
TEST (CH2) coincide.
8. Tighten the fixed screw to fix the disc table, then press the [CLEAR] button.
9. The disc table rotates in the counterclockwise direction. Measure the waveform and make sure that the flat portion center at the top of
the SENS (CH1) input waveform and the ‘’H” center of TEST (CH2) coincide.
10. If the adjustment is not successful, press the [CLEAR] button to rotate the disc table in the clockwise direction,
and perform steps 6 to 9.
Note: During the adjustment mode, the rotational direction is switched each time the [CLEAR] button is pressed.
Pressing the [CHECK] button enters the loading mode which will be described later. Pressing the [CLEAR] button rotates the disc table again.
TEST (CH2) waveform
SENS (CH1) waveform
Flat portion center of
SENS (CH1) waveform
Holder (sensor)
Fixed screw

– 14 –
MAGNET ASSY ALIGMENT
1. Check that there is no disc in the unit and then turn ON the power. Open the door, and set a disc in the PLUS ONE slit.
2. Turn OFF the power, close the door, and while pressing the [CLEAR] and [PLUSONE] buttons simultaneously, turn ON the power
again.
3. Press the [CHECK] button, and set the loading mode.
4. Press the ±button and chuck the disc.
5. Adjust the magnet assembly and magnet holder so that A=B as shown in the figure.
DISC HOLDER A ALIGMENT
1. Check that there is no disc in the unit and then turn ON the power. Open the door, and set a disc in the PLUS ONE slit.
2. Turn OFF the power, close the door, and while pressing the [CLEAR] and [PLUSONE] buttons simultaneously, turn ON the power
again.
3. Press the [CHECK] button, and set the loading mode.
4. Press the ±button and chuck the disc.
5. Press ≠or ±button to stop the disc holder A slightly away from the disc.
6. Rotate and adjust the adjusting screw so that the center of the disc and that of the disc holder coincide.
Magnet ASSY
Magnet ASSY
Magnet holder
Screw (For adjustment
)
A B
Disc
Disc
Disc holder A
Disc holder A
a b
a = b
Screw (For adjustment
)

– 15 –
Note :
1. CD Block is basically designed to operate without adjustment.
Therefore, check each item in order given.
2. UseYEDS-18 disc (3-702-101-01) unless otherwise indicated.
3. Use an oscilloscope with more than 10MΩimpedance.
4. Clean the object lens by an applicator with neutral detergent
when the signal level is low than specified value with the fol-
lowing checks.
S Curve Check
Procedure :
1. Press the I/ubutton and turn ON the power supply.
2. Open the front cover, and press the [PLUSONE] button.
3. Set the disc (YEDS-18) into the “PLUS ONE” slit.
4. Close the front cover, and chuck the disc.
5. Press the I/ubutton and turn OFF the power.
6. Connect the oscilloscope to TP (FE) of the BD board.
7. Connect TP (ADJ) of the DISPLAY board and the ground with
a lead wire.
8. Press the I/ubutton and turn ON the power.
9. The first track will be played back automatically. When the
[CHECK] button is pressed, “S JI” will be displayed on the
fluorescent indicator tube, and focus search will be repeated.
10. Check the oscilloscope waveform (S-curve) is symmetrical be-
tween A and B. And confirm peak to peak level within 1.8 ±
0.6 Vp-p.
11. Turn OFF the power, and remove the lead wire connected at
step 7.
Note: • Try to measure several times to make sure than the ratio ofA : 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
Procedure :
1. Press the I/ubutton and turn ON the power supply.
2. Open the front cover, and press the [PLUSONE] button.
3. Set the disc (YEDS-18) into the “PLUS ONE” slit.
4. Close the front cover, and chuck the disc.
5. Press the I/ubutton and turn OFF the power.
6. Connect the oscilloscope to TP (RF) of the BD board.
7. Connect TP (ADJ) of the DISPLAY board and the ground with
a lead wire.
8. Press the I/ubutton and turn ON the power.
9. Playback the fifth track of the disc.
10. Confirm that oscilloscope waveform is clear and check RF sig-
nal level is correct or not.
11. Turn OFF the power, and remove the lead wire connected at
step 7.
Note: A clear RF signal waveform means that the shape “◊” can be clearly
distinguished at the center of the waveform.
E-F Balance (Traverse) Check
The procedure for this checking method differs for when a general
remote control unit is used and not used.
When a general remote commander is used:
1. Press the I/ubutton and turn ON the power supply.
2. Open the front cover, and press the [PLUSONE] button.
3. Set the disc (YEDS-18) into the “PLUS ONE” slit.
4. Close the front cover, and chuck the disc.
5. Press the I/ubutton and turn OFF the power.
6. Connect the oscilloscope to TP (TE) of the BD board.
7. Connect TP (ADJ) of the DISPLAY board and the ground with
a lead wire.
8. Press the I/ubutton and turn ON the power.
9. Playback the fifth track of the disc.
10. Press the [3] button on the remote commander. (The tracking
servo and the sledding servo are turned OFF.)
11. Check the level B of the oscilliscope's waveform and theA (DC
voltage) of the center of the Traverse waveform.
Confirm the following :
A/B x 100 = less than ±10%
12. Press the [8] button on the remote control unit. (The tracking
servo and sledding servo are turned ON.) Confirm the C (DC
voltage) is almost equal to theA (DC voltage) is step 11.
13. Turn OFF the power, and remove the lead wire connected at
step 7.
SECTION 6
ELECTRICAL ADJUSTMENTS
BD board
TP (FE)
TP (VC) +
–
oscilloscope
symmetry
within 1.8
± 0.6Vp-p
A
B
S-curve waveforms
BD board
TP (RF)
TP (VC) +
–
oscilloscope
(AC range)
level : 1.6 ±
0.3
Vp-p
0.2
VOLT/DIV : 200mV
TIME/DIV : 500ns
RF signal waveform
BD board
TP (TE)
TP (VC) +
–
oscilloscope
Center of the waveform
level : 1.3
± 0.5 Vp-p
A (DC voltage
)
B
0 V
Traverse waveform
C (DC
voltage
)
Tracking servo
Sled servo
ON
Tracking servo
Sled servo
OFF
Traverse waveform
0 V

– 16 –
When a general remote commander is not used:
1. Solder lead wires to TP (DVDD) and TP (TOFF) on the BD
board severally.
2. Connect the oscilloscope to TP (TE) of the BD board.
3. Press the I/ubutton and turn ON the power supply.
4. Open the front cover, and press the [PLUSONE] button.
5. Set the disc (YEDS-18) into the “PLUS ONE” slit.
6. Close the front cover, and chuck the disc.
7. Playback the fifth track of the disc.
8. Short-circuit the lead wire connected at step 1. (The tracking
servo is turned OFF)
9. Check the level B of the oscilliscope's waveform and the A
(DC voltage) of the center of the Traverse waveform.
Confirm the following :
A/B x 100 = less than ±10%
10. Disconnect the lead wire short-circuited at step 8. (The track-
ing servo is turned ON.) Confirm the C (DC voltage) is almost
equal to the A (DC voltage) is step 8.
11. Turn OFF the power, and remove the lead wire connected at
step 1.
RF PLL Free-run Frequency Check
Procedure :
1. Connect the frequency counter to TP (PCK) of the BD board.
2. Press the I/ubutton and turn ON the power supply.
3. Open the front cover, and press the [PLUSONE] button.
4. Set the disc (YEDS-18) into the “PLUS ONE” slit.
5. Close the front cover, and chuck the disc.
6. Playback the fifth track of the disc.
7. Confirm that reading on frequency counter is 4.3218 MHz ±
30 kHz.
About RV502 on the AUDIO board
RV502 of the AUDIO board requires no adjustments. Please note
that it should be dixed to mechanical center position when you
moved and do not know origin position.
Adjustment Location:
[ BD BOARD ] — CONDUCTOR SIDE —
[ DISPLAY BOARD ] — CONDUCTOR SIDE —
[ AUDIO BOARD ] — COMPONENT SIDE —
frequency counter
BD board
TP (PCK)
C (DC
voltage
)
Tracking servo
ON
Tracking servo
OFF
Traverse waveform
0 V
CNP801
IC801
CNP804
TP
(ADJ)
IC102
TP
(TOFF) TP
(DVDD)
TP
(PCK)
TP
(RF)
TP
(TE)
TP
(FE)
TP
(VC)
CN101
CN103
CN102
IC101
BD board
TP (FE)
TP (VC) +
–
oscilloscope
T501
NO503
CN841 CN801
CN811
CN501
RV502 (No Adjustment)
Center of the waveform
level : 1.3
± 0.5 Vp-p
A (DC voltage
)
B
0 V
Traverse waveform

– 17 –
SECTION 7
DIAGRAMS
• Circuit Boards Location
TABLE SENSOR BOARD
DISC SENSOR (R) board
DISC SENSOR (S) board
AUDIO board
BD board
SW board
CD MOTOR board
POWER SW board
LED board

– 18 –
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ωand 1/4W or less unless otherwise
specified.
•¢: internal component.
•C: panel designation.
Note on PrintedWiring Boards:
•X: parts extracted from the component side.
•Y: parts extracted from the conductor side.
•¢: internal component.
•b: Pattern from the side which enables seeing.
•: Solder bridge.
•Indication of transistor.
Note:
The components identi-
fied by mark !or dotted
linewith mark !are criti-
cal for safety.
Replace only with part
number specified.
Note:
Lescomposants identifiés par
une marque !sont critiques
pour la sécurité.
Ne les remplacer que par une
piéce portant le numéro
spécifié.
•U: B+ Line.
•V: B– Line.
•H: adjustment for repair.
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark: PLAY
• Voltages aretakenwithaVOM(Input impedance 10MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
J: CD
c: digital out
• Abbreviation
AED : North European
AUS : Australian model.
CND : Canadian model.
E2 : 120 V AC Area in E model.
E3 : 240 V AC Area in E model.
SP : Singapore model.
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
C
BThese are omitted. E
Q
12345678
12345678
12345678
12345678
B
These are omitted.
CE
Q

CDP-CX53
– 19 – – 20 –
7-1. PRINTED WIRING BOARD – BD Section –
•See page 17 for Circuit Boards Location. •See page 18 for Note.
• Semiconductor
Location
Ref. No. Location
D151 D-1
IC101 D-3
IC102 B-3
IC103 B-1
Q101 B-4
Q102 B-4
Q103 E-1
(Page 23)
(Page 28)

CDP-CX53
7-2. SCHEMATIC DIAGRAM – BD Section –
•See page 34 forWaveforms. •See page 35 for IC Block Diagrams. •See page 37 for IC Pin Function Description. •See page 18 for Note.
• no mark: PLAY
• Signal path.
J: CD
c: digital out
– 21 – – 22 –
The components identified by mark !or dotted
line with mark !are critical for safety.
Replaceonlywithpartnumber specified.
Lescomposantsidentifiéspar unemarque !sont
critiques pourla sécurité. Ne lesremplacer que
par une piéce portant le numéro spécifié.