Read Sony CDX-A250 / CDX-A250EE Service Manual online
2
CDX-A250/A250EE
If the optical pick-up block is defective, please replace the whole
optical pick-up block.
Never turn the semi-fixed resistor located at the side of optical
pick-up block.
optical pick-up block.
Never turn the semi-fixed resistor located at the side of optical
pick-up block.
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.
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.
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 Chip Component Replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
SERVICE NOTES
This label is located on the bottom of the chassis.
CH model
TEST DISCS
Please use the following test discs for the check on the voltage and
the waveforms of the CD section.
Please use the following test discs for the check on the voltage and
the waveforms of the CD section.
YDES-18 (Part No. 3-702-101-01)
PATD-012 (Part No. 4-225-203-01)
PATD-012 (Part No. 4-225-203-01)
optical pick-up
semi-fixed resistor
CAUTION
Use of controls or adjustments or performance of procedures other
than those specified herein may result in hazardous radiation
exposure.
than those specified herein may result in hazardous radiation
exposure.
This compact disc player is classified as a CLASS 1 LASER
product. The CLASS 1 LASER PRODUCT label is located on the
exterior.
product. The CLASS 1 LASER PRODUCT label is located on the
exterior.
EXCEPT CH model
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE
WITH MARK 0 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.
WITH MARK 0 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.
Power amplifier section
Outputs:
Speaker outputs (sure seal connectors)
Speaker impedance:
4 – 8 ohms
Maximum power output: CDX-A250 (E, EA, CH, IND):
52 W
× 4 (at 4 ohms)
CDX-A250 (AEP, UK)/A250EE:
50 W
50 W
× 4 (at 4 ohms)
General
Outputs:
Audio outputs terminal (sub/rear switchable)
Power antenna relay control terminal
Power amplifier control terminal
Power antenna relay control terminal
Power amplifier control terminal
Inputs:
Antenna input terminal
AUX input jack (stereo mini jack)
AUX input jack (stereo mini jack)
Tone controls:
Low:
±10 dB at 60 Hz (XPLOD)
Mid:
±10 dB at 1 kHz (XPLOD)
High:
±10 dB at 10 kHz (XPLOD)
Power requirements:
12 V DC car battery (negative ground)
Dimensions:
Approx. 178
× 50 × 178 mm
(w/h/d)
Mounting dimensions:
Approx. 182
× 53 × 162 mm
(w/h/d)
Mass:
Approx. 1.2 kg
Supplied accessories:
Parts for installation and connections (1 set)
Card remote commander: RM-X151
Card remote commander: RM-X151
Design and specifications are subject to change
without notice.
without notice.
• Abbreviation
EA : Saudi Arabia model
CH : Chinese model
IND : Indian model
CH : Chinese model
IND : Indian model
Ver. 1.2
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