Sony CDX-2500R: µ

Maintenance

Dismounting the unit

Fuse replacement

When replacing the fuse, be sure to use one

matching the amperage rating stated on the

original fuse. If the fuse blows, check the

Release key

power connection and replace the fuse. If the

(supplied)

fuse blows again after replacement, there may

be an internal malfunction. In such a case,

µ

consult your nearest Sony dealer.

Fuse (10 A)

µ

Warning

Never use a fuse with an amperage rating

exceeding the one supplied with the unit as

µ

this could damage the unit.

Pull t he unit out while t he release key is insert ed.

Cleaning the connectors

The unit may not function properly if the

connectors between the unit and the front

panel are not clean. In order to prevent this,

open the front panel by pressing (RELEASE),

then detach it and clean the connectors with a

cotton swab dipped in alcohol. Do not apply

too much force. Otherwise, the connectors may

be damaged.

Main unit

Back of the f ront panel

Notes

• For safety, turn off the engine before cleaning

the connectors and remove the key from the

ignition switch.

• Never touch the connectors directly with your

fingers or any metal device.

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Specifications

CD player section

General

System Compact disc digital audio

Outputs Power aerial relay control

system

lead

Signal-to-noise ratio 80 dB

Telephone ATT control

Frequency response 10 – 20,000 Hz

lead

Wow and flutter Below measurable limit

Tone controls Bass ±8 dB at 100 Hz

Treble ±8 dB at 10 kHz

Power requirements 12 V DC car battery

Tuner section

(negative ground)

FM

Dimensions Approx. 178 × 50 × 185 mm

Tuning range 87.5 – 108.0 MHz

(w/h/d)

Mounting dimensions Approx. 182 × 53 × 162 mm

Aerial terminal External aerial connector

(w/h/d)

Intermediate frequency 10.7 MHz

Usable sensitivity 12 dBf

Mass Approx. 1.2 kg

Supplied accessories Parts for installation and

Selectivity 75 dB at 400 kHz

connections (1 set)

Signal-to-noise ratio 65 dB (stereo),

68 dB (mono)

Front panel case (1)

Optional accessories Rotary Commander

Harmonic distortion at 1 kHz

RM-X4S

0.8 % (stereo),

0.6 % (mono)

Compact disc single

adapter CSA-8

Separation 35 dB at 1 kHz

Frequency response 30 – 15,000 Hz

MW/LW

Design and specifications are subject to change

without notice.

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

Power amplifier section

Outputs Speaker outputs

(sure seal connectors)

Speaker impedance 4 – 8 ohms

Maximum power output

45 W × 4 (at 4 ohms)

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Troubleshooting guide

The following checklist will help you remedy the problems you may encounter with your unit.

Before going through the checklist below, check the connection and operating procedures.

General

Problem

Cause/Solution

No sound.

•Cancel the ATT function.

•Set the fader control to the centre position for two-speaker

systems.

•Rotate the dial in a clockwise direction to adjust the volume.

The contents of the memory

• The power cord or battery has been disconnected.

have been erased.

• The reset button has been pressed.

n Store again into the memory.

Indications do not appear in

Remove the front panel and clean the connectors. See “Cleaning

the display.

the connectors” (page 20) for details.

No beep sound.

The beep sound is canceled (page 18).

CD playback

Problem

Cause/Solution

A disc cannot be loaded.

•Another CD is already loaded.

•The CD is forcibly inserted upside down or in the wrong way

(MD).

Playback does not begin.

Dirty CD.

A disc is automatically ejected.

The ambient temperature exceeds 50°C.

CD will not eject.

Press 6 for two seconds.

The operation buttons do not

Press the reset button.

function.

The sound skips due to

• The unit is installed at an angle of more than 60°.

vibration.

• The unit is not installed in a sturdy part of the car.

continue to next page n

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Radio reception

Problem

Cause/Solution

Preset tuning is not possible.

• Memorise the correct frequency.

• The broadcast signal is too weak.

Automatic tuning is not

The broadcast signal is too weak.

possible.

n Use manual tuning.

The stations cannot be

Connect an power aerial control lead (blue) or accessory power

received.

supply lead (red) to the power supply lead of a car’s aerial

The sound is hampered by

booster. (When your car has built-in FM/MW/LW aerial in the

noises.

rear/side glass only.)

The “ST” indication flashes.

•Tune in the frequency accurately.

•The broadcast signal is too weak.

n Set to the MONO mode (page 10).

RDS

Problem

Cause/Solution

The SEEK starts after a few

The station is non-TP or has a weak signal.

seconds of listening.

n Press (AF/TA) repeatedly until “AF TA-OFF” appears.

No traffic announcements.

•Activate “TA.”

•The station does not broadcast any traffic announcements

despite being TP.

n Tune to another station.

PTY displays “NONE.”

The station does not specify the programme type.

If the above-mentioned solutions do not help improve the situation, consult your nearest Sony

dealer.

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