CDX-MP40 - CD Player SONY - Free user manual and instructions
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| Product Type | CD player with FM/AM tuner |
| Brand | Sony |
| Model | CDX-MP40 |
| Dimensions (W × H × D) | 178 × 50 × 180 mm |
| Weight | 1.2 kg |
| Power Supply | Car battery 12 V DC (negative ground) |
| Output Power | 52 W × 4 (at 4 ohms) |
| Playable Audio Formats | Audio CD, CD-R, CD-RW, MP3 (ISO 9660 Level 1/2, Joliet, Romeo) |
| Radio | FM (87.5 – 107.9 MHz), AM (530 – 1,710 kHz) |
| Station Memory | Up to 6 stations per band (FM1, FM2, FM3, AM1, AM2) |
| Equalizer | EQ3 with 7 preset curves (XPLOD, VOCAL, CLUB, JAZZ, NEW AGE, ROCK, CUSTOM) and manual adjustments (LOW, MID, HI) |
| Playback Functions | Repeat (track, album, disc), shuffle (album, disc, changer), disc name search |
| Display | CD TEXT, ID3 tags (v1), disc/album/track name, clock |
| Connectors | Front/Rear audio outputs, power antenna control, amp control, remote input, BUS |
| Supplied Accessories | Mini remote commander RM-X115, faceplate case, installation parts |
| Security | Detachable faceplate, warning alarm if key is in OFF position without faceplate removed |
| Maintenance | Clean connectors with alcohol-soaked cotton swab; replace fuse (10 A) |
| Operating Temperature | Up to 50 °C (ambient temperature) |
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USER MANUAL CDX-MP40 SONY
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
– Reorient or relocate the receiving antenna.
– Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.
You are cautioned that any changes or modifications not expressly approved in this manual could void your authority to operate this equipment.
CAUTION
The use of optical instruments with this product will increase eye hazard.
Welcome!
Thank you for purchasing this Sony Compact Disc Player. You can enjoy its various features even more with:
- MP3 file playback.
- CD-R/CD-RW which can have a session added can be played (page 7).
- Discs recorded in Multi Session (CD-Extra, Mixed CD, etc.) can be played, depending on the recording method (page 7).
- Optional CD/MD units (both changers and players) ^*1 .
- ID3 tag ^*2 version 1 information (displayed when an MP3 file is played).
- CD TEXT information (displayed when a CD TEXT disc*3 is played).
• Supplied controller accessory Card remote commander RM-X115 - Optional controller accessory Wired rotary commander RM-X4S
*1 This unit works with Sony products only.
*2 ID3 tag is an MP3 file that contains information about album name, artist name, track name, etc.
*3 A CD TEXT disc is an audio CD that includes information such as the disc name, artist name, and track names. This information is recorded on the disc.

The “XM Ready” logo indicates that this product will control a Sony XM tuner module (sold separately).
Please see your nearest authorized Sony dealer for details on the XM tuner module.
For instructions on XM tuner operation, please refer to the XM tuner module's included instruction manual.
Table of Contents
Location of controls 4
Precautions 6
Notes on discs 6
About MP3 files 7
Getting Started
Resetting the unit....9
Detaching the front panel 9
Setting the clock 10
CD Player
CD/MD Unit (optional)
Playing a disc....11
Display items....12
Playing tracks repeatedly — Repeat Play .... 12
Playing tracks in random order — Shuffle Play .... 13
Labeling a CD — Disc Memo*....13
Locating a disc by name — List-up* .... 14
* Functions available with optional CD/MD unit
Radio
Storing stations automatically — Best Tuning Memory (BTM) ..... 15
Receiving the stored stations 15
Storing only the desired stations.... 16
Storing station names — Station Memo .... 16
Tuning in a station through a list — List-up.... 17
Other Functions
Using the rotary commander.... 18
Adjusting the balance and fader ..... 19
Quickly attenuating the sound ..... 19
Changing the sound and display settings — Menu .... 20
Setting the equalizer (EQ3).... 20
Setting the Dynamic Soundstage Organizer (DSO).... 21
Additional Information
Maintenance 21
Removing the unit. 23
Specifications 24
Troubleshooting 25
Error displays/Messages 26
Location of controls
Refer to the pages listed for details.

1 SOURCE (Power on/Radio/CD/MD) button
Selecting the source.
2 SEL (select) button
Selecting items.
3 Volume +/- button
4 Display window
5 SEEK +/- button
Radio:
Tuning in stations automatically/finding a station manually.
CD (MP3 files)/MD:
Skipping tracks/fast-forwarding, reversing a track.
6 DSPL (display mode change) button 10, 12, 14, 17
7 OPEN button 9, 11
8 DSO button 21
9 ATT (attenuate) button 19
10 MODE button
Changing the operation.
11 SENS/BTM button 15, 16
12 RESET button (located on the front side of the unit, behind the front panel) 9
13 Number buttons 20
Radio:
Storing the desired station on each number button.
CD/MD:
①: DISC - 11
②: DISC + 11
③: REP 12
④: SHUF 13
MP3 files:
⑤: ALBUM - 11
⑥: ALBUM + 11
14 LIST button 13, 14, 16, 17
15 ▲ (eject) button (located on the front side of the unit, behind the front panel) 11
16 OFF (Stop/Power off) button*1 9, 11
17 Receptor for the card remote commander
18 EQ3 button 20
*1 Warning when installing in a car without an ACC (accessory) position on the ignition switch
After turning off the ignition, be sure to press and hold OFF on the unit until the display disappears.
Otherwise, the display does not turn off and this causes battery drain.
Card remote commander RM-X115

flowchart
graph TD
A["1 DSPL"] --> B["2 RESET"]
B --> C["3 SOURCE"]
C --> D["4 OFF"]
D --> E["5"]
F["MODE"] --> G["6"]
H["SEEK"] --> I["7"]
J["SEEK+"] --> K["8"]
L["ATT"] --> M["9"]
N["+VOL"] --> O["-"]
The corresponding buttons of the card remote commander control the same functions as those on this unit.
1 DSPL button
2 SOURCE button
3 SEEK (+/−) buttons
4 OFF button
5 VOL (+/-) buttons
6 MODE button
7 DISC/ALBUM (+/-) buttons
8 ATT button
Note
If the display disappears by pressing OFF, it cannot be operated with the card remote commander unless SOURCE on the unit is pressed, or a disc is inserted to activate the unit first.
Tip
Refer to “Replacing the lithium battery” for details on how to replace the batteries (page 22).
Selecting a disc and album with the card remote commander
Disc and album can be skipped using the DISC/ALBUM (+/-) buttons on the card remote commander.
(With this unit)
| To | Press |
| Skip albums*– Album selection | + or – [once for each album]To continuously skip albums, press and hold either button. |
(With optional unit)
| To | Press |
| Skip discs–Disc selection | + or – [once for each disc]To continuously skip discs, press once and press again within 2 seconds (and hold) either button. |
| Skip albums*–Album selection | + or – [hold for a moment] and releaseTo continuously skip albums, press (and hold) within 2 seconds of first releasing the button. |
* Available only when an MP3 file is played.
Skipping tracks continuously
Press once (+) or (−) on the card remote commander, then press again within 2 seconds and hold.
Precautions
- If your car has been parked in direct sunlight, allow the unit to cool off before operating it.
- Power antenna will extend automatically while the unit is operating.
- While driving, do not use the CUSTOM FILE feature or any other functions which may divert your attention from the road.
If you have any questions or problems concerning your unit that are not covered in this manual, please consult your nearest Sony dealer.
Moisture condensation
On a rainy day or in a very damp area, moisture condensation may occur inside the lenses and display of the unit. Should this occur, the unit will not operate properly. In such a case, remove the disc and wait for about an hour until the moisture has evaporated.
To maintain high sound quality
Be careful not to splash juice or other soft drinks onto the unit or discs.
Notes on discs
- To keep the disc clean, do not touch the surface. Handle the disc by its edge.
- Keep your discs in their cases or disc magazines when not in use. Do not subject the discs to heat/high temperature. Avoid leaving them in parked cars or on dashboards/rear trays.

natural_image
Illustration showing a hand holding a disc and a CD with a cross symbol (no text or labels)- Do not attach labels, or use discs with sticky ink/residue. Such discs may stop spinning when used, causing a malfunction, or may ruin the disc.

- Do not use any discs with labels or stickers attached. The following malfunctions may result from using such discs:
- Inability to eject a disc (due to a label or sticker peeling off and jamming the eject mechanism).
- Inability to read audio data correctly (e.g., playback skipping, or no playback) due to heat shrinking of a sticker or label causing a disc to warp.
- Discs with non-standard shapes (e.g., heart, square, star) cannot be played on this unit. Attempting to do so may damage the unit. Do not use such discs.
- You cannot play 8 cm CDs.
- Before playing, clean the discs with a commercially available cleaning cloth. Wipe each disc from the center out. Do not use solvents such as benzine, thinner, commercially available cleaners, or antistatic spray intended for analog discs.

natural_image
Illustration of hands holding a CD or DVD disc with arrows indicating direction (no text or symbols)Music discs encoded with copyright protection
This product is designed to play back discs that conform to the Compact Disc (CD) standard. Recently, various music discs encoded with copyright protection are marketed by some record companies. Please be aware that among those discs, there are some that do not conform to the CD standard and may not be playable by this product.
Notes on CD-Rs (recordable CDs)/CD-RWs (rewritable CDs)
This unit can play the following discs:
| Type of discs | Label on the disc | |
| Audio CD | ![]() | ![]() |
| MP3 files | ![]() | ![]() |
![]() | ![]() | |
- Some CD-Rs/CD-RWs (depending on the equipment used for its recording or the condition of the disc) may not play on this unit.
- You cannot play a CD-R/CD-RW that is not finalized*.
- You can play MP3 files recorded on CD-ROMs, CD-Rs, and CD-RWs.
- A CD-R/CD-RW to which a session can be added can be played.
* A process necessary for a recorded CD-R/CD-RW disc to be played on the audio CD player.
About MP3 files
MP3 (MPEG 1 Audio Layer-3) is a standard technology and format for compressing a sound sequence. The file is compressed to about 1/10 of its original size. Sounds outside the range of human hearing are compressed while the sounds we can hear are not compressed.
Notes on discs
You can play MP3 files recorded on CD-ROMs, CD-Rs, and CD-RWs.
The disc must be in the ISO 9660*1 level 1 or level 2 format, or Joliet or Romeo in the expansion format.
You can use a disc recorded in Multi Session ^*2 .
\*1 ISO 9660 Format
The most common international standard for the logical format of files and folders on a CD-ROM.
There are several specification levels. In Level 1, file names must be in the 8.3 format (no more than 8 characters in the name, no more than 3 characters in the extension “.MP3”) and in capital letters. Folder names can be no longer than 8 characters. There can be no more than 8 nested folder levels. Level 2 specifications allow file names up to 31 characters long.
Each folder can have up to 8 trees.
For Joliet or Romeo in the expansion format, make sure of the contents of the writing software, etc.
\*2 Multi Session
This is a recording method that enables adding of data using the Track-At-Once method. Conventional CDs begin at a CD control area called the Lead-in and end at an area called Lead-out. A Multi Session CD is a CD having multiple sessions, with each segment from Lead-in to Lead-out regarded as a single session.
CD-Extra: The format which records audio (audio CD data) as tracks on session 1, and records data as tracks on session 2.
Mixed CD: In this format, data is recorded as track 1, and audio (audio CD data) is recorded as track 2.
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Notes
- With formats other than ISO 9660 level 1 and level 2, folder names or file names may not be displayed correctly.
- When naming, be sure to add the file extension ".MP3" to the file name.
- If you put the extension “.MP3” to a file other than MP3, the unit cannot recognize the file properly and will generate random noise that could damage your speakers.
- The following discs take a longer time to start playback.
- a disc recorded with complicated tree structure.
- a disc recorded in Multi Session.
- a disc to which data can be added.
Cautions when playing a disc that is recorded in Multi Session
- When the first track of the first session is audio CD data:
Only audio CD data is played back.
Non-audio CD data/MP3 file information (track number, time, etc.) is displayed with no sound. - When the first track of the first session is not audio CD data:
- If an MP3 file is in the disc, only MP3 file(s) play back and other data is skipped. (Audio CD data is not recognized.)
- If no MP3 file is in the disc, "NO MUSIC" is displayed and nothing is played back. (Audio CD data is not recognized.)
The playback order of the MP3 files
The playback order of the folders and files is as follows:

flowchart
graph TD
A["1"] --> B["2"]
B --> C["3"]
C --> D["4"]
D --> E["5"]
E --> F["6"]
F --> G["7"]
G --> H["8"]
H --> I["9"]
style A fill:#ccc,stroke:#333
style B fill:#ccc,stroke:#333
style C fill:#ccc,stroke:#333
style D fill:#ccc,stroke:#333
style E fill:#ccc,stroke:#333
style F fill:#ccc,stroke:#333
style G fill:#ccc,stroke:#333
style H fill:#ccc,stroke:#333
style I fill:#ccc,stroke:#333
Tree 1 (root)
Tree 2
Tree 3
Tree 4
Tree 5
Notes
- A folder that does not include an MP3 file is skipped.
- When you insert a disc with many trees, it takes a longer time to start playback. We recommend that you make only one or two trees for each disc.
• Maximum folder number: 150 (including root folder and empty folders) - The maximum number of MP3 files and folders that can be contained in a disc: 300 When a file/folder name contains many characters, this number may become less than 300.
- The maximum number of trees which can be played is 8.
Tip
To specify a desired playback order, before the folder or file name, input the order by number (e.g., "01," "02"), then record contents onto a disc. (The order differs depending on the writing software.)
Getting Started
Resetting the unit
Before operating the unit for the first time, or after replacing the car battery or changing the connections, you must reset the unit.
Remove the front panel and press the RESET button with a pointed object, such as a ball-point pen.

natural_image
Simple line drawing of a rectangular room with furniture and a small object at the bottom (no text or symbols)RESET button
Note
Pressing the RESET button will erase the clock setting and some stored contents.
Detaching the front panel
You can detach the front panel of this unit to protect the unit from being stolen.
Caution alarm
If you turn the ignition switch to the OFF position without removing the front panel, the caution alarm will beep for a few seconds. If you connect an optional amplifier and do not use the built-in amplifier, the beep sound will be deactivated.
1 Press OFF \*.
CD/MD playback or radio reception stops (the key illumination and display remain on).
* If your car has no ACC position on the ignition switch, be sure to turn the unit off by pressing OFF until the display disappears to avoid car battery drain.
2 Press OPEN, then slide the front panel to the right, and gently pull out the left end of the front panel.

Notes
- If you detach the panel while the unit is still turned on, the power will turn off automatically to prevent the speakers from being damaged.
- Do not drop or put excessive pressure on the front panel and its display window.
- Do not subject the front panel to heat/high temperature or moisture. Avoid leaving it in a parked car or on a dashboard/rear tray.
Tip
When carrying the front panel with you, use the supplied front panel case.
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Attaching the front panel
Place hole Ⓐ of the front panel onto the spindle Ⓑ on the unit, then lightly push the left side in. Press SOURCE on the unit (or insert a CD) to operate the unit.

Note
Do not put anything on the inner surface of the front panel.
Setting the clock
The clock uses a 12-hour digital indication.
Example: To set the clock to 10:08
1 Press DSPL for 2 seconds.
The hour indication flashes.
SET

① Press the volume +/- button to set the hour.
② Press SEL.
The minute indication flashes.
③ Press the volume +/- button to set the minute.
2 Press DSPL.

The clock starts. After the clock setting is completed, the display returns to normal play mode.
CD Player CD/MD Unit (optional)
In addition to playing a CD with this unit, you can also control external CD/MD units.
Note
If you connect an optional CD unit with the CD TEXT function, the CD TEXT information will appear in the display when you play a CD TEXT disc.
Playing a disc
(With this unit)
1 Press OPEN and insert the disc (labelled side up).

natural_image
Line drawing of a hand holding a CD inside a device (no text or symbols)2 Close the front panel.
Playback starts automatically.
If a disc is already inserted, press SOURCE repeatedly until “CD” appears to start playback.
| To | Press |
| Stop playback | OFF |
| Eject the disc | OPEN then ▲ |
| Skip tracks– AutomaticMusic Sensor | SEEK (-/+) (◄◄/►►) [once for each track] |
| Fast-forward/reverse– Manual Search | SEEK (-/+) (◄◄/►►) [hold to desired point] |
| Skip albums*– Albums selection | 5(ALBUM−) or6(ALBUM+) |
* Available only when an MP3 file is played.
To skip tracks continuously, press (+) or (−), then press again within 2 seconds and hold.
Notes
- Before playing a track, this unit reads all track and album information on the disc. Depending on the track structure, it may take more than a minute before playback begins. During this time, “READ” is displayed. Please wait for play to start automatically when the reading is complete.
- Depending on the condition of the disc, it may not play back (page 6, 7).
- While the first/last track on the disc is playing, if (+) or (-) is pressed, playback skips to the last/first track of the disc.
- When the last track on the disc is over, playback restarts from the first track of the disc.
- With optional unit connected, playback of the same source will continue on to the optional CD/MD unit.
- If you play a high-bit rate MP3 file such as 320 kbps, sound may be intermittent.
(With optional unit)
1 Press SOURCE repeatedly to select "CD" or "MD (MS*1)."
2 Press MODE repeatedly until the desired unit appears.
Playback starts.
| To | Press |
| Skip discs– Disc selection | 1(DISC−) or2(DISC+) |
| Skip albums*2– Albums selection | 5(ALBUM−) or6(ALBUM+) |
*1 MS: MG Memory Stick System-up Player MGS-X1
*2 Available only when an MP3 file is played.
Cautions when connecting MGS-X1 and MD unit(s) This unit recognizes MGS-X1 as an MD unit.
- When you want to play MGS-X1, press SOURCE to select "MS" or "MD." If "MS" appears in the source display, MGS-X1 starts to play. If "MD" appears in the source display, press MODE to select "MS," to start playback.
- When you want to play an MD unit, press SOURCE to select "MD" or "MS." If your desired MD unit appears in the source display, it starts to play. If "MS" or another MD unit appears in the source display, press MODE to select your desired MD unit, to start playback.
Note when playing back a CD with no MP3 files
If a disc with no MP3 files is inserted:
– in the case of this unit, “NO MUSIC” appears in the display, and the display becomes the clock display (CD playback stops).
– in the case of an optional MP3 compatible CD unit, "NO MUSIC" appears in the display and playback of the next disc starts.
– in the case of an optional CD unit, which is incompatible with MP3, the disc will play back with no sound.
Display items
When the disc/album/track changes, any prerecorded title*1 of the new disc/album/track is automatically displayed (if the Auto Scroll function is set to “ON,” names exceeding 8 characters will be scrolled (page 20))

| To | Press |
| Switch display item | DSPL |
*1 While an optional CD/MD unit is connected.
*2 Only for MP3 files.
Only track name/artist name/album name in ID3 tag is displayed.
When pressing DSPL, “NO ID3” indicates that there is no ID3 tag to display.
*3 When pressing DSPL, "NO NAME" indicates that there is no Disc Memo (page 13) or prerecorded name to display.
*4 Only for CD TEXT discs with the artist name.
Notes
- For some CD TEXT discs with very many characters, information may not scroll.
- Some characters cannot be displayed.
- This unit cannot display the artist name for each track of a CD TEXT disc.
Notes on MP3
• ID3 tag applies only to version 1.
- Some characters cannot be displayed. Characters and signs which cannot be displayed appear as “*.” The maximum number of characters for album (folder) names/track (file) names that can be displayed is 64 each. ID3 tag is up to 30 characters.
- In the following cases, elapsed playing time may not be displayed accurately.
- when an MP3 file of VBR (variable bit rate) is played.
- during fast-forward/reverse.
Tip
When A.SCRL (Auto Scroll) is set to OFF and the disc/album/track name is changed, the disc/album/track name or ID3 tag does not scroll.
Playing tracks repeatedly
— Repeat Play
You can select:
- REP-TRACK — to repeat the current track.
- REP-ALBM ^*1 — to repeat the tracks in the current album.
- REP-DISC ^*2 — to repeat the tracks in the current disc.
*1 Available only when an MP3 file is played.
*2 Available only when one or more optional CD/MD units are connected.
During playback, press ③ (REP) repeatedly until the desired setting appears in the display.
Repeat Play starts.
To return to normal play mode, select "REP-OFF."
Playing tracks in random order
— Shuffle Play
You can select:
- SHUF-ALBM ^*1 — to play the tracks in the current album in random order.
- SHUF-DISC — to play the tracks on the current disc in random order.
- SHUF-CHGR ^*2 — to play the tracks in the current optional CD (MD) unit in random order.
- SHUF-ALL ^*3 — to play all the tracks in all connected CD (MD) units (including this unit) in random order.
*1 Available only when an MP3 file is played.
*2 Available only when one or more optional CD (MD) units are connected.
*3 Available only when one or more optional CD units, or two or more optional MD units are connected.
During playback, press ④ (SHUF) repeatedly until the desired setting appears in the display.
Shuffle Play starts.
To return to normal play mode, select "SHUF-OFF."
Note
"SHUF-ALL" will not shuffle tracks between CD units and MD units.
Labeling a CD
— Disc Memo (For a CD unit with the CUSTOM FILE function)
You can label each disc with a custom name (Disc Memo). You can enter up to 8 characters for a disc. If you label a CD, you can locate the disc by name (page 14).
1 Start playing the disc you want to label in a CD unit with the CUSTOM FILE function.
2 Press LIST for 2 seconds.

The unit will repeat the disc during the labeling procedure.
3 Enter the characters.
① Press the volume +/- button to select the desired character.

*1 (blank space)
② Press SEL after locating the desired character.
The next character flashes.

③ Repeat steps ① and ② to enter the entire name.
4 To return to normal play mode, press LIST for 2 seconds
Tips
- Simply overwrite or enter “—” to correct or erase a name.
- You can label CDs on a unit without the CUSTOM FILE function if that unit is connected along with a CD unit that has the function. The Disc Memo will be stored in the memory of the CD unit with the CUSTOM FILE function.
Note
REP-TRACK/SHUF play is suspended until the Name Edit is complete.
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Viewing the Disc Memo
As a display item, the Disc Memo always takes priority over any original CD TEXT information.
| To | Press |
| View | DSPL during CD/CD TEXT disc playback |
Tip
Other items can be displayed (page 12).
Erasing the Disc Memo
1 Press SOURCE repeatedly to select "CD."
2 Press MODE repeatedly to select the CD unit storing the Disc Memo.
3 Press LIST for 2 seconds.
4 Press DSPL for 2 seconds.
The stored names will appear.
5 Press the volume +/- button repeatedly to select the disc name you want to erase.
6 Press SEL for 2 seconds.
The name is erased.
Repeat steps 5 and 6 if you want to erase other names.
7 Press LIST for 2 seconds.
The unit returns to normal play mode.
Notes
- When the Disc Memo for a CD TEXT disc is erased, the original CD TEXT information is displayed.
- If you cannot find the Disc Memo you want to erase, try selecting a different CD unit in step 2.
- If you have already erased all of the Disc Memo, the unit returns to normal play mode in step 4.
Locating a disc by name
— List-up (For a CD unit with the CD TEXT/CUSTOM FILE function, or an MD unit)
You can use this function for discs that have been assigned custom names ^1 or for CD TEXT discs ^2 .
*1 Locating a disc by its custom name: when you assign a name for a CD (page 13) or an MD.
*2 Locating discs by the CD TEXT information: when you play a CD TEXT disc on a CD unit with the CD TEXT function.
1 Press LIST momentarily.
The name assigned to the current disc appears in the display.

2 Press LIST repeatedly until you find the desired disc.
3 Press SEEK (+) or SEEK (-) to play the disc.
Notes
- Once a disc name has been displayed for 5 seconds, the display goes back to its normal playback mode.
- The track names are not displayed during MD playback.
- If there are no discs in the magazine, "NO MAG" appears in the display.
- If a disc has not been assigned a custom file, "NO NAME" appears in the display.
- If the disc information has not been read by the unit, "NOT READ" appears in the display. To load the disc, first press the number button, then choose the disc that has not been loaded.
- The information appears only in upper case. There are also some letters which cannot be displayed (during MD playback).
Radio
The unit can store up to 6 stations per band (FM1, FM2, FM3, AM1, and AM2).
Caution
When tuning in stations while driving, use Best Tuning Memory to prevent accidents.
Storing stations automatically
— Best Tuning Memory (BTM)
The unit selects the stations with the strongest signals within the selected band, and stores them in the order of their frequency.
1 Press SOURCE repeatedly to select the radio.
2 Press MODE repeatedly to select the band.
3 Press SENS (BTM) for 2 seconds.
The unit stores stations in the order of their frequencies on the number buttons.
A beep sounds when the setting is stored.
Notes
- If only a few stations can be received due to weak signals, some number buttons will retain their former settings.
- When a number is indicated in the display, the unit starts storing stations from the one currently displayed.
Receiving the stored stations
1 Press SOURCE repeatedly to select the radio.
2 Press MODE repeatedly to select the band.
3 Press the number button (① to ⑥) on which the desired station is stored.
If preset tuning does not work
— Automatic tuning/Local Seek Mode
Automatic tuning:
Press SEEK (+) or SEEK (-) to search for the station.
Scanning stops when the unit receives a station. Repeat the operation until the desired station is received.
Local Seek Mode:
If the automatic tuning stops too frequently, press 📄SENS (BTM) repeatedly until “LOCAL-ON” appears.
"LCL" indicator is displayed.

Only the stations with relatively strong signals will be tuned in.
To cancel the Local Seek Mode, press SENS twice.
Tip
If you know the frequency of the station you want to listen to, press and hold (SEEK) (+) or (SEEK) (-) to locate the approximate frequency, then press (SEEK) (+) or (SEEK) (-) repeatedly to fine adjust to the desired frequency (manual tuning).
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If FM stereo reception is poor
— Monaural Mode
During radio reception, press SENS (BTM) repeatedly until “MONO-ON” appears.

The sound improves, but becomes monaural (“ST” disappears).
To return to normal radio reception mode, select "MONO-OFF."
Tip
If FM broadcasts are difficult to hear, set DSO to off (page 21).
Storing only the desired stations
You can manually preset the desired stations on any chosen number button.
1 Press SOURCE repeatedly to select the radio.
2 Press MODE repeatedly to select the band.
3 Press SEEK (+) or SEEK (-) to tune in the station that you want to store.
4 Press the desired number button (① to ⑥) for 2 seconds until "MEM" appears.
The number button indication appears in the display.
Note
If you try to store another station on the same number button, the previously stored station will be erased.
Storing station names
— Station Memo
You can assign a name to each radio station and store it in memory. The name of the station currently tuned in appears in the display. You can assign a name using up to 8 characters for a station.
Storing the station names
1 Tune in a station whose name you want to store.
2 Press LIST for 2 seconds.

3 Enter the characters.
① Press the volume +/- button to select the desired character.

*1 (blank space)
② Press SEL after locating the desired character.
The next character flashes.

③ Repeat steps ① and ② to enter the entire name.
4 To return to normal play mode, press LIST for 2 seconds.
Tip
Simply overwrite or enter “—” to correct or erase a name.
Erasing the station name
1 Press SOURCE repeatedly to select the radio.
2 Press MODE repeatedly to select the band.
3 Press LIST for 2 seconds.
4 Press DSPL for 2 seconds.
The stored names will appear.
5 Press the volume +/- button repeatedly to select the disc name you want to erase.
6 Press SEL for 2 seconds.
The name is erased.
Repeat steps 5 and 6 if you want to erase other names.
7 Press LIST for 2 seconds.
The unit returns to normal play mode.
Note
If you have already erased all of the station names, "NO DATA" appears in step 6.
Tuning in a station through a list
— List-up
1 During radio reception, press LIST momentarily. The frequency or the name assigned to the current station appears in the display.

2 Press LIST repeatedly until you find the desired station.
3 Press SEEK (+) or SEEK (-) to tune in the desired station.
Other Functions
You can also control the unit (and optional CD/MD units) with a rotary commander (optional).
Using the rotary commander
First, attach the appropriate label depending on how you want to mount the rotary commander. The rotary commander works by pressing buttons and/or rotating controls.

By pressing buttons

| Press | To |
| SOURCE | Change source (radio/CD/MD*1)/Power on |
| MODE | Change operation (radio band/CD unit*1/MD unit*1) |
| ATT | Attenuate sound |
| OFF *2 | Stop playback or radio reception/Power off |
| SEL | Adjust and select |
| DSPL | Change the display item |
By rotating the control

Rotate and release to:
- Skip tracks.
To continuously skip tracks, rotate once and rotate again within 2 seconds and hold the control.
– Tune in stations automatically.
Rotate, hold, and release to:
– Fast-forward/reverse a track.
– Find a station manually.
By pushing in and rotating the control

Push in and rotate the control to:
- Receive preset stations.
- Change discs during CD (MD) playback ^*1 .
- Change albums ^*3 .
*1 Only if the corresponding optional equipment is connected.
*2 If your car has no ACC (accessory) position on the ignition key switch, after turning off the ignition, be sure to press and hold OFF until the display disappears.
*3 Available only when an MP3 file is played.
When an MP3 file is played, you can select an album using the rotary commander.
(With this unit)
| To | Do this |
| Skip albums – Album selection | Push in and rotate [once for each album] the control. To continuously skip albums, push in and rotate (and hold) the control. |
(With optional unit)
| To | Do this |
| Skip discs–Disc selection | Push in and rotate [once for each disc] the control.To continuously skip discs, push in and rotate once and rotate again within 2 seconds (and hold) the control. |
| Skip albums–Album selection | 1 To enter Album selection mode, push in, then rotate and hold the control. Within 2 seconds, proceed to step 2.2 Push in, then rotate quickly and repeatedly, to skip albums one by one. |
Changing the operative direction
The operative direction of controls is factory-set as shown below.

If you need to mount the rotary commander on the right hand side of the steering column, you can reverse the operative direction.

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Illustration of hands using a handheld device to interact with a button (no text or symbols visible)Press SEL for 2 seconds while pushing the VOL control.
Adjusting the balance and fader
You can adjust the balance and fader.
1 Press SEL repeatedly until "BAL" or "FAD" appears.
Each time you press SEL, the item changes as follows:
$$ \mathrm{LOW} ^ {} \rightarrow \mathrm{MID} ^ {} \rightarrow \mathrm{HI} ^ {*} \rightarrow $$
$$ \text { BAL (left - right) } \rightarrow \text { FAD (front - rear) } $$
* When EQ3 is activated (page 20).
2 Press the volume +/- button to adjust the selected item.
Note
Adjust within 3 seconds after selecting the item.
Quickly attenuating the sound
Press ATT.
After “ATT-ON” momentarily appears, the “ATT” appears in the display.
To restore the previous volume level, press ATT again.
Tip
When the interface cable of a car telephone is connected to the ATT lead, the unit decreases the volume automatically when a telephone call comes in (Telephone ATT function).
Changing the sound and display settings
— Menu
The following items can be set:
SET (Set Up)
• A.SCRL (Auto Scroll)*1 (page 12).
- M.DSPL (Motion Display) — to select the Motion Display mode from “1,” “2,” and “OFF.”
- Select “1” to show decoration patterns in the display and activate Demo display.
- Select “2” to show decoration patterns in the display and deactivate Demo display.
- Select "OFF" to deactivate the Motion Display.
- BEEP ^*2 — to turn the beeps on or off.
Selecting the desired item
Press SEL and the desired preset number button simultaneously.
SEL + 3: A.SCRL*1
SEL + 4: M.DSPL
SEL + 6: BEEP*2
*1 When no CD is playing, this item will not appear.
*2 The beep sound is output only when the built-in amplifier is used.
After the mode setting completed, the display returns to normal play mode.
Note
The displayed item will differ depending on the source.
To cancel the item, press SEL and the preset number button simultaneously again.
Setting the equalizer (EQ3)
You can select an equalizer curve for 7 music types (XPLOD, VOCAL, CLUB, JAZZ, NEW AGE, ROCK, CUSTOM, and OFF (equalizer OFF)).
You can store a different equalizer setting for each source.
Selecting the equalizer curve
1 Press SOURCE to select a source (radio, CD or MD).
2 Press EQ3 repeatedly until the desired equalizer curve appears.
Each time you press EQ3, the item changes.

To cancel the equalizing effect, select "OFF."
Adjusting the equalizer curve
You can store and adjust the equalizer settings for different tone ranges.
1 Press SOURCE to select a source (radio, CD or MD).
2 Press EQ3 repeatedly to select the desired equalizer curve.
3 Adjusting the equalizer curve.
① Press SEL repeatedly to select the desired tone range.
Each time you press Ⓐ SEL, the tone range changes.
LOW → MID → HI (→ BAL → FAD)
② Press the volume +/- button repeatedly to adjust to the desired volume level.
The volume level is adjustable by 1 dB steps from -10 dB to +10 dB.

③ Repeat step ① and ② to adjust the equalizer curve.
To restore the factory-set equalizer curve, press SEL for 2 seconds.
After 3 seconds, the display returns to normal play mode.
Note
When EQ3 is set to "OFF," you cannot adjust the equalizer settings.
Setting the Dynamic Soundstage Organizer (DSO)
If your speakers are installed into the lower part of the doors, the sound will come from below and may not be clear.
The DSO (Dynamic Soundstage Organizer) function creates a more ambient sound as if there were speakers above the dashboard (virtual speakers).
You can store the DSO setting for each source.
DSO mode and image of virtual speakers

*1 DSO-1
*2 DSO-2
*3 DSO-3
*4 DSO-OFF
1 Press SOURCE to select a source (radio, CD or MD).
2 Press DSO repeatedly until the desired DSO setting appears.
Each time you press DSO, the DSO setting changes.

To cancel the DSO function, select "OFF."
After 3 seconds, the display returns to normal play mode.
Notes
- Depending on the type of car interior or type of music, DSO may not have a desirable affect.
- If FM broadcasts are difficult to hear, set DSO to off.
Additional Information
Maintenance
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 power connection and replace the fuse. If the fuse blows again after replacement, there may be an internal malfunction. In such a case, consult your nearest Sony dealer.

Warning
Never use a fuse with an amperage rating exceeding the one supplied with the unit as this could damage the unit.
continue to next page →
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, detach the front panel (page 9) and clean the connectors with a cotton swab dipped in alcohol. Do not apply too much force. Otherwise, the connectors may be damaged.

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Line drawing of a hand using a tool to adjust or install a mechanical component (no text or symbols present)Main unit

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Line drawing of a hand holding a small electronic device (no text or symbols visible)Back of the front panel
Notes
- For safety, turn off the ignition before cleaning the connectors, and remove the key from the ignition switch.
- Never touch the connectors directly with your fingers or with any metal device.
Replacing the lithium battery
Under normal conditions, batteries will last approximately 1 year. (The service life may be shorter, depending on the conditions of use.) When the battery becomes weak, the range of the card remote commander becomes shorter. Replace the battery with a new CR2025 lithium battery. Use of any other battery may present a risk of fire or explosion.

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Illustration of a hand using a pen to apply a component to a small electronic component (no text or symbols present)↓

Notes on lithium battery
- Keep the lithium battery out of the reach of children. Should the battery be swallowed, immediately consult a doctor.
- Wipe the battery with a dry cloth to assure a good contact.
- Be sure to observe the correct polarity when installing the battery.
- Do not hold the battery with metallic tweezers, otherwise a short-circuit may occur.
WARNING
Battery may explode if mistreated. Do not recharge, disassemble, or dispose of in fire.
Removing the unit
1 Remove the protection collar.
① Detach the front panel (page 9).
② Engage the release keys together with the protection collar.

③ Pull out the release keys to remove the protection collar.

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Diagram showing two rectangular frames with a directional arrow between them, no text or symbols present.2 Remove the unit.
① Insert both release keys together until they click.

② Pull the release keys to unseat the unit.

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Pure mechanical assembly diagram showing a bracket with arrows indicating direction (no text or symbols)③ Slide the unit out of the mounting.

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Isometric line drawing of a rectangular electronic component with a downward arrow indicating compression or dislocation (no text or symbols)Specifications
AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL HARMONIC DISTORTION
23.2 watts per channel minimum continuous average power into 4 ohms, 4 channels driven from 20 Hz to 20 kHz with no more than 5% total harmonic distortion.
CD Player section
| Signal-to-noise ratio | 90 dB |
| Frequency response | 10 – 20,000 Hz |
| Wow and flutter | Below measurable limit |
Tuner section
FM
| Tuning range | 87.5 – 107.9 MHz |
| Antenna terminal | External antenna connector |
| Intermediate frequency | 10.7 MHz/450 kHz |
| Usable sensitivity | 9 dBf |
| Selectivity | 75 dB at 400 kHz |
| Signal-to-noise ratio | 67 dB (stereo),69 dB (mono) |
| Harmonic distortion at 1 kHz | |
| 0.5 % (stereo),0.3 % (mono) | |
| Separation | 35 dB at 1 kHz |
| Frequency response | 30 – 15,000 Hz |
AM
| Tuning range | 530 – 1,710 kHz |
| Antenna terminal | External antenna connector |
| Intermediate frequency | 10.7 MHz/450 kHz |
| Sensitivity | 30 μV |
Power amplifier section
| Outputs | Speaker outputs(sure seal connectors) |
| Speaker impedance | 4 – 8 ohms |
| Maximum power output | 52 W × 4 (at 4 ohms) |
General
| Outputs | Audio outputs (front/rear) |
| Power antenna relay control terminal | |
| Power amplifier control terminal | |
| Inputs | Telephone ATT control terminal |
| Remote controller input terminal | |
| BUS control input terminal | |
| BUS audio input terminal | |
| Antenna input terminal | |
| 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 × 180 mm( 7^1/8 × 2 × 7^1/8 in)(w/h/d) |
| Mounting dimensions | Approx. 182 × 53 × 161 mm( 7^1/4 × 2^1/8 × 6^3/8 in)(w/h/d) |
| Mass | Approx. 1.2 kg(2 lb 10 oz) |
| Supplied accessories | Card remote commanderRM-X115Parts for installation and connectionsFront panel case (1) |
| Optional accessories | Rotary commanderRM-X4S |
| Optional equipment | CD changer (10 discs)CDX-757MX, CDX-656CD changer (6 discs)CDX-T70MX, CDX-T69MD changer (6 discs)MDX-66XLPMG-MS System-up PlayerMGS-X1XM Satellite RadioReceiverXT-XM1Source selectorXA-C30AUX-IN SelectorXA-300 |
Note
This unit cannot be connected to a digital preamplifier or an equalizer which is Sony BUS system compatible.
Design and specifications are subject to change without notice.
Troubleshooting
The following checklist will help you remedy problems you may encounter with your unit. Before going through the checklist below, check the connection and operating procedures.
General
No sound.
- Press the volume + button to adjust the volume.
- Cancel the ATT function.
- Set the fader control to the center position for a 2-speaker system.
- You tried to play back MP3 files with an optional CD unit which is incompatible with MP3.
→Play back with a Sony MP3 compatible CD unit, such as the CDX-757MX.
The contents of the memory have been erased.
- The RESET button has been pressed. → Store again into the memory.
- The power cord or battery has been disconnected.
- The power connecting cord is not connected properly.
No beep sound.
- The beep sound is canceled (page 20).
- An optional power amplifier is connected and you are not using the built-in amplifier.
The display disappears from/does not appear in the display window.
- The display disappears if you press and hold OFF.
→Press and hold OFF again until the display appears. - Remove the front panel and clean the connectors. See “Cleaning the connectors” (page 22) for details.
Stored stations and correct time are erased. The fuse has blown.
Makes noise when the ignition key is in the ON, ACC, or OFF position.
The leads are not matched correctly with the car's accessory power connector.
No power is being supplied to the unit.
- Check the connection. If everything is in order, check the fuse.
- The car does not have an ACC position. →Press SOURCE (or insert a disc) to turn on the unit.
The power is continuously supplied to the unit.
The car does not have an ACC position.
The power antenna does not extend.
The power antenna does not have a relay box.
CD/MD playback
A disc cannot be loaded.
- Another CD/MD is already loaded.
- The CD/MD has been forcibly inserted upside down or in the wrong way.
Playback does not begin.
• Defective MD or dirty CD.
- CD-R/CD-RW that is not finalized.
- You tried to playback a CD-R/CD-RW not designed for audio use.
- Some CD-Rs/CD-RWs may not play due to its recording equipment or the disc condition.
MP3 files cannot be played back.
- Recording was not performed according to the ISO 9660 level 1 or level 2 format, or the Joliet or Romeo in the expansion format.
- The file extension “.MP3” is not added to the file name.
- Files are not stored in MP3 format.
MP3 files take longer to play back than others.
The following discs take a longer time to start playback.
– a disc recorded with complicated tree structure.
– a disc recorded in Multi Session.
– a disc to which data can be added.
A disc is automatically ejected.
The ambient temperature exceeds 50^ C ( 122^ F).
The operation buttons do not function. CD will not be ejected.
Press the RESET button.
The sound skips from vibration.
- The unit is installed at an angle of more than 60^ .
- The unit is not installed in a sturdy part of the car.
The sound skips.
Dirty or defective disc.
Cannot turn off the “----” indication.
You entered the name edit mode.
→Press LIST for 2 seconds.
continue to next page →
Radio reception
Preset tuning is not possible.
- Store the correct frequency in the memory.
- The broadcast signal is too weak.
The stations cannot be received. The sound is hampered by noises.
- Connect a power antenna control lead (blue) or accessory power supply lead (red) to the power supply lead of a car's antenna booster. (Only when your car has built-in FM/AM antenna in the rear/side glass.)
- Check the connection of the car antenna.
- The auto antenna will not go up. → Check the connection of the power antenna control lead.
- Check the frequency.
- When the DSO mode is on, the sound is sometimes hampered by noises.
→ Set the DSO mode to off (page 21).
Automatic tuning is not possible.
- The local seek mode is set to “ON.”
→ Set the local seek mode to “OFF” (page 15). - The broadcast signal is too weak.
→Perform manual tuning.
The "ST" indication flashes.
- Tune in the frequency accurately.
- The broadcast signal is too weak. →Set the monaural reception mode to “ON” (page 16).
A programme broadcast in stereo is heard in monaural.
The unit is in monaural reception mode.
→Cancel monaural reception mode (page 16).
Error displays/Messages
Error displays
(For this unit and optional CD/MD changers) The following indications will flash for about 5 seconds, and an alarm sound will be heard.
BLANK\*1
No tracks have been recorded on an MD. ^*2 →Play an MD with recorded tracks on it.
ERROR\*1
- A CD is dirty or inserted upside down. ^2
→ Clean or insert the CD correctly. - An MD does not playback because of some problem. ^*2
→Insert another MD. - A CD/MD cannot play because of some problem.
→ Insert another CD/MD.
HI TEMP
The ambient temperature is more than 50^ C ( 122^ F).
→ Wait until the temperature goes down below 50^ C ( 122^ F).
NO DISC
No disc is inserted in the CD/MD unit.
→Insert discs in the CD/MD unit.
NO MAG
The disc magazine is not inserted in the CD/MD unit.
→ Insert the magazine in the CD/MD unit.
NO MUSIC
A CD which is not a music file is inserted in the MP3 playable CD unit.
→ Insert a music CD in the MP3 playable CD unit.
NOT READY
The lid of the MD unit is open or the MDs are not inserted properly.
→ Close the lid or insert the MDs properly.
RESET
The CD/MD unit cannot be operated because of some problem.
→Press the RESET button on the unit.
*1 When an error occurs during playback of a CD or MD, the disc number of the CD or MD does not appear in the display.
*2 The disc number of the disc causing the error appears in the display.
If these solutions do not help improve the situation, consult your nearest Sony dealer.
Messages
L.SEEK +/-
The Local Seek mode is on during automatic tuning (page 15).
“LLLL” or “הכלה”
You have reached the beginning or the end of the disc and you cannot go any further.
About ID3 tag version 2
Although not a malfunction, the following occurs when an MP3 file containing ID3 tag ver.2 is played:
- When skipping a portion of ID3 tag ver.2 (at the beginning of the track), sound is not output. Skip time changes depending ID3 tag ver.2 capacity. Example: At 64 kbytes, it is about 2 seconds (with RealJukebox).
- The displayed elapsed playing time when skipping a portion of ID3 tag ver.2 is inaccurate. For MP3 files of a bit rate other than 128 kbps, time is not displayed accurately during playback.
- When an MP3 file is created with MP3 conversion software (ex. RealJukebox*), ID3 tag ver.2 will automatically be written.
* "RealJukebox is a registered trademark of RealNetworks, Inc."
As of December, 2001
Félicitations !
7 Touche OPEN 10, 12
8 Touche DSO 25
14 Touche LIST 15, 16, 17, 19, 20
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Simple line drawing of a rectangular room with furniture and a small object at the bottom (no text or symbols)Touche RESET
Remarque
Remarques
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Line drawing of a hand holding a CD inside a device (no text or symbols)2 Fermez la façade
La lecture commence.
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Illustration of hands using a handheld device to interact with a button (no text or symbols visible)*1 DSO-1
*2 DSO-2
*3 DSO-3
*4 DSO-OFF
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Line drawing of a hand using a tool to adjust or install a mechanical component (no text or symbols present)Appareil principal

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Illustration of a hand using a tool to apply soldering or soldering on a circuit board (no text or symbols present)
Côté + vers le haut






