Read Sony DSX-A50BT / DSX-A50BTE Service Manual online
DSX-A50BT/A50BTE
3
SECTION 1
SERVICING NOTES
UNLEADED SOLDER
Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
the lead free mark due to their particular size)
: LEAD FREE MARK
Unleaded solder has the following characteristics.
• Unleaded solder melts at a temperature about 40 °C higher
• Unleaded solder melts at a temperature about 40 °C higher
than ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350 °C.
Caution: The printed pattern (copper foil) may peel away if
about 350 °C.
Caution: The printed pattern (copper foil) may peel away if
the heated tip is applied for too long, so be careful!
• Strong
viscosity
Unleaded solder is more viscous (sticky, less prone to fl ow)
than ordinary solder so use caution not to let solder bridges
occur such as on IC pins, etc.
than ordinary solder so use caution not to let solder bridges
occur such as on IC pins, etc.
• Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.
also be added to ordinary solder.
NOTE FOR REPLACEMENT OF THE BT BOARD
When repairing, the complete BT board should be replaced since
any parts in the BT board cannot be repaired.
When repairing, the complete BT board should be replaced since
any parts in the BT board cannot be repaired.
ABOUT CHECKING THE OPERATION
When checking the operation of this unit, connect a USB device
to this unit.
Refer to the support site written in the operating instruction for the
details about the compatibility of a USB device.
When checking the operation of this unit, connect a USB device
to this unit.
Refer to the support site written in the operating instruction for the
details about the compatibility of a USB device.
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 unit.
Refer to the following, initialize this unit.
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 unit.
Refer to the following, initialize this unit.
Note: Phonebook data and dialed/received call history can be deleted by
executing “Reset.”
Initializing Bluetooth Settings
Canceling the DEMO mode
You can initialize all the Bluetooth related
settings (pairing information, phonebook,
call history, preset number, device
information, etc.) from this unit.
settings (pairing information, phonebook,
call history, preset number, device
information, etc.) from this unit.
1
Press and hold
for 1
second to turn off the power.
2
Press and hold the select button.
The menu list appears.
The menu list appears.
3
Rotate the control dial to select “BT
INIT,” then press it.
The confirmation appears.
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.
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.”
should be deleted with “BT INIT.”
You can cancel the demonstration display
which appears during turning off.
which appears during turning off.
1
Press and hold the select button.
The setup display appears.
The setup display appears.
2
Rotate the control dial until “DEMO”
appears, then press it.
appears, then press it.
3
Rotate the control dial to select
“DEMO-OFF,” then press it.
The setting is complete.
“DEMO-OFF,” then press it.
The setting is complete.
4
Press
(BACK).
The display returns to normal reception/
play mode.
play mode.
Replacing the lithium battery of the
remote commander
When the battery becomes weak, the range
of the 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.
remote commander
When the battery becomes weak, the range
of the 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.
+ side up
Notes on the lithium battery
t Keep the lithium battery out of the reach of
t Keep the lithium battery out of the reach of
children. Should the battery be swallowed,
immediately consult a doctor.
immediately consult a doctor.
t Wipe the battery with a dry cloth to assure a
good contact.
t Be sure to observe the correct polarity when
installing the battery.
t Do not hold the battery with metallic tweezers,
otherwise a short-circuit may occur.
t Do not expose the battery to excessive heat such
as direct sunlight, fire or the like.
WARNING
Battery may explode if mistreated.
Do not recharge, disassemble, or dispose
of in fire.
Battery may explode if mistreated.
Do not recharge, disassemble, or dispose
of in fire.
Cleaning the connectors
e 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 and clean the
connectors with a cotton swab. Do not apply
too much force. Otherwise, the connectors
may be damaged.
panel are not clean. In order to prevent this,
detach the front panel and clean the
connectors with a cotton swab. Do not apply
too much force. Otherwise, the connectors
may be damaged.
Notes
t For safety, turn o the ignition before cleaning
the connectors, and remove the key from the
ignition switch.
ignition switch.
t Never touch the connectors directly with your
ngers or with any metal device.
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