MEX-BT2900, MEX-BT2950 - Sony Car Audio Service Manual (repair manual). Page 5

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MEX-BT2900/BT2950
5
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
– Bottom View –
Part No.
Model Number Label
Part No.
Destination
4-260-585-0[]
BT2900: AEP and UK models
4-260-587-0[]
BT2900: US and Canadian models
4-260-588-0[]
BT2950: E model
4-260-589-0[]
BT2950: Mexican model
Replacing the lithium battery of the card remote 
commander
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. 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.
1
2
+ side up
c
WARNING
Battery may explode if mistreated.
Do not recharge, disassemble, or dispose of in fire.
IMPORTANT  NOTE  OF  “INITIALIZING”
The purpose of “Bluetooth Initialize” is to initialize the Bluetooth 
connection history (HF/Audio Streaming). (To delete the device 
information for the devices that you connected to when searching, 
etc.)
When the BT board or MAIN board (including BT board) are re-
placed, it is necessary to initialize this set.
Refer to the following, initialize this set.
Note: Phonebook data and dialed/received call history can be deleted by 
executing “Reset.”
You can initialize all the Bluetooth-related 
settings from this unit.
This setting appears when turned off.
1
Press and hold (SOURCE/OFF) for 1 
second to turn off the power.
2
Press and hold the select button.
The menu list appears.
3
Rotate the control dial to select “BT 
INIT,” then press it.
The confirmation appears.
4
Rotate the control dial to select “INIT-
YES,” then press it.
“INITIAL” flashes while initializing the 
Bluetooth settings.
“COMPLETE” appears when initializing has 
finished.
Note
When disposing of this unit, preset numbers should be 
deleted with “BT INIT.”
You can cancel the demonstration display which 
appears during turning off.
1
Press and hold the select button.
The setup display appears.
2
Rotate the control dial until “DEMO” 
appears, then press it.
3
Rotate the control dial to select 
“DEMO-OFF,” then press it.
The setting is complete.
4
Press 
 (BACK).
The display returns to normal reception/play 
mode.
Initializing Bluetooth Settings
Canceling the DEMO mode
Ver. 1.1
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