Sony CDX-2500R User manual
1
MICROFILM
Model Name Using Similar Mechanism CDX-4270R
CD Drive Mechanism Type MG-363X-121
Optical Pick-up Name KSS-521A
SERVICE MANUAL
AEP Model
UK Model
CDX-2500R
FM/MW/LW COMPACT DISC PLAYER
CD player section
System Compact disc digital audio
system
Signal-to-noise ratio 80 dB
Frequency response 10 – 20,000 Hz
Wow and flutter Below measurable limit
Tuner section
FM
Tuning range 87.5 – 108.0 MHz
Aerial terminal External aerial connector
Intermediate frequency 10.7 MHz
Usable sensitivity 12 dBf
Selectivity 75 dB at 400 kHz
Signal-to-noise ratio 65 dB (stereo),
68 dB (mono)
Harmonic distortion at 1 kHz
0.8% (stereo),
0.6% (mono)
Separation 35 dB at 1 kHz
Frequency response 30 – 15,000 Hz
MW/LW
Tuning range MW: 531 – 1,602 kHz
LW: 153 – 281 kHz
Aerial terminal External aerial connector
Intermediate frequency 10.7 MHz / 450 kHz
Sensitivity MW: 30 µV
LW: 50 µV
SPECIFICATIONS
Power amplifier section
Outputs Speaker outputs
(sure seal connectors)
Speaker impedance 4 – 8 ohms
Maximum power output 45 W ×4 (at 4 ohms)
General
Outputs Power aerial relay control
lead
Telephone ATT control
lead
Tone controls Bass ±8 dB at 100 Hz
Treble ±8 dB at 10 kHz
Power requirements 12 V DC car battery
(negative ground)
Dimensions Approx. 178 ×50 ×185 mm
(w/h/d)
Mounting dimension Approx. 182 ×53 ×162 mm
(w/h/d)
Mass Approx. 1.2 kg
Supplied accessories Parts for installation and
connections (1 set)
Front panel case (1)
Design and specifications are subject to change without
notice.
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
2
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0OR DOTTED LINE
WITH MARK 0ON 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.
SERVICE NOTE
CAUTION
Use of controls or adjustments or performance of proce-
dures other than those specified herein may result in haz-
ardous radiation exposure.
Notes on Chip Component Replacement
•Never reuse a disconnected chip component.
•Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
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, ob-
serve from more than 30 cm away from the objective lens.
NOTES ON PICK-UP FLEXIBLE BOARD
The pick-up flexible board in this set is secured to the optical pick-
up with an adhesive tape. Once the tape is removed, an adhering
force becomes weak, and it cannot be reused.
Therefore, if the optical pick-up is replaced, replace also the pick-
up flexible board with a new one.
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
3
TABLE OF CONTENTS
1. GENERAL
Location of controls.................................................................4
Getting Started......................................................................... 4
Setting the clock ...................................................................... 4
CD Player ................................................................................ 4
Radio ....................................................................................... 5
RDS ......................................................................................... 5
Other Functions ....................................................................... 6
Connections ............................................................................. 8
2. DISASSEMBLY
2-1. Cover ................................................................................. 10
2-2. Front Panel Assy ............................................................... 10
2-3. Sub Panel (1) Assy ............................................................ 11
2-4. CD Mechanism Block .......................................................11
2-5. Main Board ....................................................................... 12
2-6. Heat Sink ........................................................................... 12
2-7. Chassis (T) Sub Assy ........................................................ 13
2-8. Lever Assy ......................................................................... 13
2-9. Servo Board....................................................................... 14
2-10. Roller Assy ........................................................................ 14
2-11. Chassis (OP) (O/S) Assy ................................................... 15
2-12. Optical Pick-up Block .......................................................15
3. ELECTRICAL ADJUSTMENTS
Tuner Section......................................................................... 16
CD Section ............................................................................ 19
4. DIAGRAMS
4-1. IC Pin Description............................................................. 20
4-2. Block Diagram –CD Section–........................................... 22
4-3. Block Diagram –Tuner Section– ....................................... 23
4-4. Block Diagram –Display Section–.................................... 24
4-5. Circuit Boards Location .................................................... 25
4-6. Printed Wiring Boards –CD Mechanism Section–............ 26
4-7. Schematic Diagram –CD Mechanism Section– ................ 27
4-8. Printed Wiring Board –Main Section– .............................. 28
4-9. Schematic Diagram –Main Section (1/3)– ........................ 30
4-10. Schematic Diagram –Main Section (2/3)– ........................ 31
4-11. Schematic Diagram –Main Section (3/3)– ........................ 32
4-12. Schematic Diagram –Display Section–............................. 33
4-13. Printed Wiring Board –Display Section– .......................... 34
5. EXPLODED VIEWS
5-1. Chassis Section ................................................................. 39
5-2. Front Panel Section ........................................................... 40
5-3. CD Mechanism Section (1) ............................................... 41
5-4. CD Mechanism Section (2) ............................................... 42
5-5. CD Mechanism Section (3) ............................................... 43
6. ELECTRICAL PARTS LIST ........................................ 44
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
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