Sony MEX-BT39UW Service Manual page 5

NOTE FOR REPLACEMENT OF THE USB CONNECTOR
(CN902) AND THE AUX JACK (J901)
To replace the USB connector and the AUX jack requires align-
ment.
1. Insert the USB connector and the AUX jack into the front pan-
el.
2. Place the KEY board on the front panel and align the terminals
of the USB connector and the AUX jack with the holes in the
KEY board.
3. Solder the seven terminals of the connector.
USB connector
front panel
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.
c
2
1
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.
WARNING
Battery may explode if mistreated.
Do not recharge, disassemble, or dispose of
in fire.
KEY board
AUX jack
+ side up
MEX-BT39UW/BT3900U/BT3950U
MODEL IDENTIFICATION
– Bottom View –
Model Number Label
Part No.
BT3900U: AEP and UK models
4-261-436-0[]
BT3900U: Russian model
4-261-437-0[]
4-261-439-0[] BT3900U: US and Canadian models
4-261-440-0[] BT39UW: US model
4-261-441-0[] BT3950U: E model
4-261-442-0[] BT3950U: Saudi Arabia model
4-261-443-0[] BT3950U: Mexican model
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."
Initializing Bluetooth Settings
You can initialize all the Bluetooth-related
settings from this unit.
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."
Canceling the DEMO mode
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.
Part No.
Destination
5