CDP-CX250 - Sony Audio Service Manual (repair manual)

cdp-cx250 service manual
Model
CDP-CX250
Pages
44
Size
1.19 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio / S/M CDP-CX250 ''96 US CAN AEP E
File
cdp-cx250.pdf
Date

Read Sony CDP-CX250 Service Manual online

— 1 —
Model Name Using Similar Mechanism
NEW
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
AEP Model
E Model
Australian Model
CDP-CX250
SERVICE MANUAL
,Canada
Europe and Singapore
220V-230V AC, 50Hz
110V-120V or 230-240V AC,
adjustable, 50/60 Hz
E
— 2 —
MODEL IDENTIFICATION
— BACK PANEL —
TABLE OF CONTENTS
1. SERVICING NOTE
........................................................... 3
2. GENERAL
....................................................................
4
3. DISASSEMBLY
3-1.
Front Panel Assembly ....................................................... 12
3-2.
Back Panel Assembly ....................................................... 12
3-3.
Table Assembly ................................................................ 13
3-4.
Mechanism Deck Assembly ............................................. 13
3-5.
Base Unit Assembly ......................................................... 14
4. TEST  MODE
...............................................................
15
5. ADJUSTMENTS
5-1.
Mechanical Adjsument ..................................................... 16
5-2.
Electrical Block Checking ................................................ 22
6. DIAGRAMS
6-1.
Circuit Boards Location ................................................... 24
6-2.
IC Pin Function
• IC101 Digital Servo, Digital Signal Processor
 (CXD2545Q) ................................................................ 25
• IC303 System Control  (CXP84332-Q27Q) ................. 28
6-3.
Block Diagram ................................................................. 31
6-4.
Printed Wiring Board — BD, DISP Section — ............... 35
6-5.
Schematic Diagram — BD, DISP Section — .................. 39
6-6.
Printed Wiring Board — MAIN Section — ..................... 43
6-7.
Schematic Diagram — MAIN Section — ........................ 47
6-8.
IC Block Diagrams ........................................................... 51
7. EXPLODED VIEWS
7-1.
Case and Back Panel Section ........................................... 54
7-2.
Disc table Section ............................................................. 55
7-3.
Front panel Section ........................................................... 56
7-4.
Mechanism Section-1 (CDM-40) ..................................... 57
7-5.
Mechanism Section-2 (CDM-40) ..................................... 58
7-6.
Base Unit Section-1 (KSM-213BKN/M-N) ..................... 59
7-7.
Base Unit Section-2 (KSM-213BKN/M-N) ..................... 60
8. ELECTRICAL PARTS LIST
........................................ 61
4-982-813-
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
π
Canadian Model
: 1
π
AEP,German Model : 2
π
E Model
: 3
π
Singapore Model
: 4
π
Austrarian Model
: 5
π
— 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.
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 —
SECTION  2
GENERAL
LOCATION OF PARTS AND CONTROLS
Front Panel
1 POWER button
2 CONTINUE button
3 Display window
4 SHUFFLE button
5 PROGRAM button
6 REPEAT button
7 TIME/TEXT button
8 Front cover
9 MEMO SEARCH button
!º INPUT button
!¡ Remote sensor
!™ JOG dial
!£ ENTER button
!¢ CHECK button
!∞ CLEAR button
!§ p (stop) button
!¶ P (pause) button
!• · (play) button
!ª ≠ AMS* ± button
@º OPEN button
@¡ GROUP buttons 1-8
@™ TIMER switch
* AMS is the abbreviation for Automatic Music Sensor.
!•
@™
1 234567
8
0
9
!™
!£ !¢!∞
Page of 44
Display

Download Sony CDP-CX250 Service Manual (Repair Manual)

Here you can read online and download Sony CDP-CX250 Service Manual in PDF. CDP-CX250 service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sony CDP-CX250 Audio. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.