DOWNLOAD Sony MEX-BT2700 / MEX-BT2707E / MEX-BT2750 Service Manual ↓ Size: 8.09 MB | Pages: 46 in PDF or view online for FREE

NOTE  FOR  REPLACEMENT  OF  THE  BT  BOARD
When repairing, the complete BT board (A-1433-972-A) should 
be replaced since any parts in the BT board cannot be repaired.

NOTE  FOR  REPLACEMENT  OF  THE  SERVO  BOARD
When repairing, the complete SERVO board (A-1552-122-A) 
should be replaced since any parts in the SERVO board cannot be 
repaired.

NOTE  FOR  REPLACEMENT  OF  THE  AUX  JACK 
(J901)
To replace the AUX jack requires alignment.
1.  Insert the AUX jack into the front panel.
2.  Place the KEY board on the front panel and align the terminals 

of the AUX jack with the holes in the KEY board.

3.  Solder the three terminals of the jack.

KEY board

AUX jack

front panel

Under normal conditions, the battery 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.

Notes on the lithium battery
• Keep the lithium battery out of the reach of children.

• 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

D

Battery may explode if mistreated.
Do not recharge, disassemble, or dispose of in fire.

4-124-437-0[]

BT2700: AEP and UK models

4-124-438-0[]

BT2700: US and Canadian models

4-127-668-0[]

BT2700: Italian model

4-127-669-0[]

BT2707E: Russian model

4-127-670-0[]

BT2750: E and Saudi Arabia models

4-127-671-0[]

BT2750: Mexican model

4-127-673-0[]

BT2750: Indian model (MARUTI SUZUKI)

10.  Check that the other party’s voice can be heard from the speak-

er.

11. Check by operating the Volume that the other party’s volume 

varies.

12.  Speak to the microphone of the set to check that the other party 

can hear it. (Make sure that there is no large difference from 
normal set)

13. Press the [PUSH SELECT] button for 2 seconds to check that 

the HF turns off and the set is switched to a telephone call 
between cellular phones. (This may not function depending on 
the cellular phone)

14. Press the [PUSH SELECT] button for 2 seconds to check that 

the HF turns on and the set is switched to a telephone call be-
tween MEX-BT2700/BT2707E/BT2750 and far end.

15. Press the [PUSH SELECT] button for a short time to check 

that a telephone call is terminated. Also, the original source is 
returned.

16. Perform ACC OFF -> ON to check if the set is reconnected 

automatically to the cellular phone.

7.  BT Audio Function Check
1.  Connect the set to the BT audio device (or cellular phone fur-

nished with BT audio function) to check that the streaming 
logo lights up.

2.  Play the BT audio device to check that a sound is generated 

from the set when the source is switched to the BT audio.

3.  Operate the set ([SEEK – /+], [6] button operation) to check if 

it can control the BT Audio.

Note: The functions that can be operated vary depending on the BT audio 

device connected.

4.  Perform ACC OFF -> ON to check if the set can be recon-

nected to the BT audio device. (Some BT audio devices may 
be reconnected automatically)

5.  With the BT audio source, press the [6] button to check if the 

streaming logo blinks and the set is reconnected to the BT audio 
device. (This function is disabled while the set is reconnected 
to a cellular phone. Accordingly, this test should be conducted 
after the power is turned on and then the HF logo lights up, or 
when about 30 seconds elapsed after the power on)

8. Initialize
This should be performed when the set is sent back to the user after 
all the checks fi nished successfully.
1.  Execute the initialization.
2.  Press the [BLUETOOTH] button for 3 seconds to check if the 

BT logo lights up.

3.  Check that the set is not connected automatically to the cellular 

phone that was connected last.

4.  With the BT audio source, check that the streaming logo does 

not blink when the [6] button is pressed.

9.  What to Do after Checking
1.  If the board does not need to be replaced
•  Return the bluetooth settings to original ones. (settings when 

the set was received from the user)

2.  If the board needs to be replaced
•  Return to the factory shipping mode.

BLUETOOTH  FUNCTION  CHECKING  METHOD  USING  
A  CELLULAR  PHONE
1. Required Equipment
•  Set to be tested (MEX-BT2700/BT2707E/BT2750)
•  Cellular phone (Recommended SEMC K320i or K800i, or 

select from connectable cellular phones list)

•  Speaker connection (at least Front L/R ch)
•  DC power supply (12V)

2. Preparation
Turn on the Bluetooth function of the cellular phone in advance.
Remove a Bluetooth device connected to the cellular phone in ad-
vance. (at least, remove XPLOD)

3. Test Environment
•  No other Bluetooth device is making a communication in the 

periphery. (within 20m)

•  No other MEX-BT2700/BT2707E/BT2750 are supplied with 

electric power.

•  There are no two or more wireless LAN access points in the 

periphery. (with 50m) (one is OK)

•  The set should be tested in a place such as a meeting room, free 

from ambient noise.

•  The speaker at the far end should be in a place such as another 

meeting room separated acoustically.

4. Setting
Install the MEX-BT2700/BT2707E/BT2750 on the desktop.

5. Precautions
Beware of the following points when conducting the 
talking test:
•  There is no fault if a talking can be made by adjusting appro-

priately the volume of the telephone of the other party and the 
cellular phone connected through the Bluetooth, besides the 
setup of MEX-BT2700/BT2707E/BT2750.

•  The speaker’s voice will become loud naturally if the periph-

ery is noisy, or become low if quiet. (even though the speaker 
intents to talk on the same volume level)

•  The speaker’s voice will become loud naturally if the other 

party’s voice is loud.

6.  BT PHONE Function Check
1.  Press the [BLUETOOTH] button for 5 seconds to check if the 

BT logo changes from lighting to blinking.

2.  Search peripheral equipment from the cellular phone to check 

if “XPLOD” is found.

3.  Search peripheral equipment from the cellular phone apart 

from the set about 5m to check if “XPLOD” is found.

4.  Check if peripheral equipment can be registered to the cellular 

phone (pass code 0000).

5.  Make a connection to the cellular phone to check if the HF 

logo lights up. (This may be conducted at the same time in item 
4)

6.  After making a connection to the cellular phone, move the cel-

lular phone apart from the set about 5m to check if the connec-
tion is held.

7.  After switching the source of the MEX-BT2700/BT2707E/

BT2750 to other than BT PHONE (e.g. TUNER) to check that 
a sound is generated, make a call to the cellular phone con-
nected to the set.

8.  Check that the sound being played is interrupted and in turn the 

ring tone is heard. (the built-in sound of the set will be gener-
ated or the ring tone of cellular phone will be heard depending 
on the cellular phone)

9.  Press the [PUSH SELECT] button for a short time to check 

that the conversation can be made.

This section is extracted 
from instruction manual.

This section contains instructions on the location
of controls and basic operations. For details, see
the respective pages.
The corresponding buttons on the card remote
commander control the same functions as those
on the unit.

" OFF button

To power off; stop the source.

# SEEK +/– buttons

CD:
To skip tracks (press); skip tracks
continuously (press, then press again within
about 1 second and hold); reverse/fast-
forward a track (press and hold).
Radio:
To tune in stations automatically (press); find
a station manually (press and hold).
Bluetooth audio device*

1

:

To skip tracks (press).

$ SOURCE button

To power on; change the source (Radio/CD/
AUX/Bluetooth audio/Bluetooth phone)*

2

.

% BT (BLUETOOTH) button

For Bluetooth signal on/off, pairing.

& Control dial/select/

button
To adjust volume (rotate); select setup items
(press and rotate); receive/end a call (press).

RT

RB

R

RE

RH

RG

' Disc slot

Insert the disc (label side up), playback
starts.

( Display window

) AUX input jack

To connect a portable audio device.

* ;(eject) button

To eject the disc.

+ DSPL (display)/SCRL (scroll) button

To change display items (press); scroll the
display item (press and hold).

,

- MODE button

To select the radio band (FM/AM)*

2

.

. BTM/CAT*

3

To start the BTM function (press and hold).

/ Number buttons

CD:
/ : ALBUM –/+ (during MP3/WMA
playback)

To skip albums (press); skip albums
continuously (press and hold).

: REP
: SHUF
: PAUSE

To pause playback. To cancel, press
again.

Radio:
To receive stored stations (press); store
stations (press and hold).
Bluetooth audio device*

1

:

: PAUSE

To pause playback. To cancel, press
again.

Bluetooth phone:
: MIC

0 Receptor for the card remote

1 RESET button

2 Microphone

*1 When a Bluetooth audio device (supports AVRCP

*2 In the case of a CD changer, HD Radio tuner or

4063$&  is

.0%&  is

*3 When the SAT tuner is connected.

The following buttons on the card remote
commander have also different buttons/functions
from the unit. Remove the insulation film before
use.

RL  ()/  () buttons

To control radio/CD/Bluetooth audio, the
same as

4&&,  –/+ on the unit.

Setup, sound setting, etc., can be operated by
  .

RM DSPL (display) button

To change display items.

X VOL (volume) +/– button

To adjust volume.

XB ATT (attenuate) button

To attenuate the sound. To cancel, press
again.

XT SEL (select)/

The same as the select button on the unit.

XE . (+)/N (–) buttons

To control CD, the same as

/

(ALBUM –/+) on the unit.
Setup, sound setting, etc., can be operated by
. N.

XG SCRL (scroll) button

To scroll the display item.

XH Number buttons

To receive stored stations (press); store
stations (press and hold).

4063$&  on the unit is pressed, or a disc is

XT

RT

XG

RL

XB

X

RM

XH

XE

RI

RK

This section contains instructions on the location
of controls and basic operations. For details, see
the respective pages.
The corresponding buttons on the card remote
commander control the same functions as those
on the unit.

" OFF button

To power off; stop  the source.

# SEEK +/– buttons

CD:
To skip tracks (press); skip tracks
continuously (press, then press again within
about 1 second and hold); reverse/fast-
forward a track (press and hold).
Radio:
To tune in stations automatically (press); find
a station manually (press and hold).
Bluetooth audio device*

1

:

To skip tracks (press).

$ SOURCE button

To power on; change the source (Radio/CD/
AUX/Bluetooth audio/Bluetooth phone)*

2

.

% BT (BLUETOOTH) button

For Bluetooth signal on/off, pairing.

& Control dial/select/

button
To adjust volume (rotate); select setup items
(press and rotate); receive/end a call (press).

RT

RB

R

RE

RH

RG

RI

RK

' Disc slot

Insert the disc (label side up), playback
starts.

( Display window

) AUX input jack

To connect a portable audio device.

* ;(eject) button

To eject the disc.

+ DSPL (display)/SCRL (scroll) button

To change display items (press); scroll the
display item (press and hold).

,

- MODE button

To select the radio band (FM/MW/LW)*

2

.

. AF (Alternative Frequencies)/TA

(Traffic Announcement)/PTY
(Program Type) button
To set AF and TA (press); select PTY (press
and hold) in RDS.

/ Number buttons

CD:
/ : ALBUM –/+ (during MP3/WMA
playback)

To skip albums (press); skip albums
continuously (press and hold).

: REP
: SHUF
: PAUSE

To pause playback. To cancel, press
again.

Radio:
To receive stored stations (press); store
stations (press and hold).
Bluetooth audio device*

1

:

: PAUSE

To pause playback. To cancel, press
again.

Bluetooth phone:
: MIC

0 Receptor for the card remote

1 RESET button

2 Microphone

*1 When a Bluetooth audio device (supports AVRCP

*2 In the case of a CD changer being connected;

4063$&  is pressed, “CD” and the unit

number will appear in the display. Furthermore, if
.0%&  is pressed, you can switch the changer.

The following buttons on the card remote
commander have also different buttons/functions
from the unit. Remove the insulation film before
use.

RL  ()/  () buttons

To control radio/CD/Bluetooth audio, the
same as

4&&,  –/+ on the unit.

Setup, sound setting, etc., can be operated by
  .

RM DSPL (display) button

To change display items.

X VOL (volume) +/– button

To adjust volume.

XB ATT (attenuate) button

To attenuate the sound. To cancel, press
again.

XT SEL (select)/

The same as the select button on the unit.

XE . (+)/N (–) buttons

To control CD, the same as

/

(ALBUM –/+) on the unit.
Setup, sound setting, etc., can be operated by
. N.

XG SCRL (scroll) button

To scroll the display item.

XH Number buttons

To receive stored stations (press); store
stations (press and hold).

4063$&  on the unit is pressed, or a disc is

XT

RT

XG

RL

XB

X

RM

XH

XE