Sony MEX-BT2500 Service Manual page 5

NOTE FOR REPLACEMENT OF THE BT BOARD
When repairing, the complete BT board (A-1243-387-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-1177-201-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.
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
BLUETOOTH FUNCTION CHECKING METHOD
USING A CELLULAR PHONE
1. Required Equipment
• Set to be tested (MEX-BT2500)
• 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
advance. (at least, remove XPLOD)
3. Test Environment
• No other Bluetooth device is making a communication in the
periphery. (within 20m)
• No other MEX-BT2500 is 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-BT2500 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
appropriately the volume of the telephone of the other party
and the cellular phone connected through the Bluetooth,
besides the setup of MEX-BT2500.
• The speaker's voice will become loud naturally if the periphery
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 7 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
cellular phone apart from the set about 5m to check if the
connection is held.
7. After switching the source of the MEX-BT2500 to other than
BT PHONE (i.e. TUNER) to check that a sound is generated,
make a call to the cellular phone connected 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
generated 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.
MEX-BT2500
5