-- 1 --
Model Name Using Similar Mechanism
CDP-CX250
CD Mechanism Type
CDM-40
Base Unit Type
KSM-213BKN/M-N
Optical Pick-up Type
KSS-213B/S-N
SPECIFICATIONS
MICROFILM
COMPACT DISC PLAYER
US Model
Canadian Model
CDP-CX90ES/CX270
AEP Model
CDP-CX270
CDP-CX90ES/CX270
SERVICE MANUAL
(USA, Canadian model)
220V-230V AC, 50Hz (AEP, German model)
PHOTO : CDP-CX90ES
-- 2 --
MODEL IDENTIFICATION
-- BACK PANEL --
TABLE OF CONTENTS
1. SERVICING NOTE ........................................................... 3
2. GENERAL .................................................................... 4
3. DISASSEMBLY
3-1.
Front Panel Assembly ....................................................... 15
3-2.
Back Panel Assembly ....................................................... 15
3-3.
Table Assembly ................................................................ 16
3-4.
Mechanism Deck .............................................................. 17
3-5.
Base Unit .......................................................................... 17
4. TEST MODE ............................................................... 18
5. ADJUSTMENTS
5-1.
Mechanical Adjsument ..................................................... 21
5-2.
Electrical Block Checking ................................................ 27
6. DIAGRAMS
6-1.
Circuit Boards Location ................................................... 31
6-2.
IC Pin Function
· IC101 Digital Servo, Digital Signal Processor
(CXD2545Q) ................................................................ 32
· IC401 System Control (MB90677) .............................. 35
· IC407 OSD (MB90095-OEM166) ................................ 38
6-3.
Block Diagram ................................................................. 39
6-4.
Printed Wiring Board -- BD, DISP Section -- ............... 43
6-5.
Schematic Diagram -- BD, DISP Section -- .................. 47
6-6.
Printed Wiring Board -- MAIN Section -- ..................... 51
6-7.
Schematic Diagram -- MAIN Section -- ........................ 55
6-8.
IC Block Diagrams ........................................................... 60
7. EXPLODED VIEWS
7-1.
Case and Back Panel Section ........................................... 65
7-2.
Disc table Section ............................................................. 66
7-3.
Front panel Section ........................................................... 67
7-4.
Mechanism Section-1 (CDM-40) ..................................... 68
7-5.
Mechanism Section-2 (CDM-40) ..................................... 69
7-6.
Base Unit Section-1 (KSM-213BKN/M-N) ..................... 70
7-7.
Base Unit Section-2 (KSM-213BKN/M-N) ..................... 71
8. ELECTRICAL PARTS LIST ........................................ 72
4-983-366-
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous ra-
diation 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.
This caution label
is located inside
the unit.
Notes on chip component replacement
· Never reuse a disconnected chip component.
· Notice that the minus side of a tantalum capacitor may be
damaged by heat.
Flexible Circuit Board Repairing
· Keep the temperature of soldering iron around 270°C
during repairing.
· Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
· Be careful not to apply force on the conductor when soldering
or unsoldering.
US Model
: 0
Canadian Model
: 1
AEP,German Model : 2
US Model
: 3
Canadian Model
: 4
CX270 :
CX270 :
CX270 :
CX90ES :
CX90ES :
-- 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 COMPOSANTS
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 PUBLISHED BY SONY.
SAFETY CHECK-OUT
(US model only)
After correcting the original service problem, perform the follow-
ing safety checks 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
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 0.5 mA (500 microampers). Leak-
age 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.
3. Measuring the voltage drop across a resistor by means of a VOM
or battery-operated AC voltmeter. 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 pas-
sive VOM that is suitable. Nearly all battery operated digital
multimeters that have a 2V AC range are suitable. (See Fig. A)
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.
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 emission, 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.
COLD RESET
This mode erases all the data memorized on the user memory of this
unit and sets to the same state as shipment. Take note not to set it
accidentally. To set cold reset, press the POWER button while press-
ing the CLEAR button.
The backup memory of this unit will be saved for about one month.
POSITIONING ON THE OSD (ON SCREEN DISPLAY)
SCREEN
This unit can display disc titles, etc. on the TV screen. The screen
position can be adjusted to correct screen deviations of the TV moni-
tors used. Turn on the power and press the OPEN button to open the
front cover. Then press the TIME/TEXT button next to display the
position of the screen. The position can be adjusted by pressing the
cursor button of the remote control unit supplied.
SECTION 1
SERVICING NOTE
Fig. A. Using an AC voltmeter to check AC leakage.
To Exposed Metal
Parts on Set
0.15µF
1.5k
AC
voltmeter
(0.75V)
Earth Ground
-- 4 --
1 POWER button
2 CONTINUE button
3 Front panel display
4 SHUFFLE button
5 PROGRAM button
6 REPEAT button
7 TIME/TEXT button
8 Front cover
9 SORT button
!º INPUT button
!¡ PLAYER SELECT button
!TM Remote sensor
!£ JOG dial
!¢ ENTER button
! CHECK button
!§ CLEAR button
!¶ p (stop) button
!· P (pause) button
!ª · (play) button
@º AMS* ± button
@¡ OPEN button
@TM HIT LIST buttons
@£ X-FADE buttons
@¢ GROUP buttons 1-8
@ TIMER switch
@§ Keyboard jack
* AMS is the abbreviation for Automatic Music Sensor.
LOCATION OF PARTS AND CONTROLS
Front Panel
3
5!TM
SECTION 2
GENERAL
!ª
@º
@£
4
67
890!¡
!£
12
!¢ ! !§
!¶
!·
@¡
@TM
@¢
@
@§
-- 5 --
This section is extracted from
instruction manual.