MEX-XB100BT - Sony Car Audio Service Manual (repair manual). Page 32

Setting method:
1.  In the state of source off (the clock is displayed), enter the test 

mode by pressing the buttons in order of the [

 4] 

t [MIC 

5] 

t [V

 

ALBUM 1] (press only the [V

 

ALBUM 1] button for 

two seconds).

2.  It is set to the test mode, and all segments of the liquid crystal 

display light.

Releasing method:
Press the [

 

OFF SRC] button for 1 second.

MICROPHONE  AUDIO  LOOPBACK
To confi rm the state of the external microphone used when a 
handsfree function is used, the microphone audio is output from 
the speaker.
The breakdown judgment of the microphone can be done without 
connecting H/F with the cellular phone.

Procedure:
1.  Enter the test mode.
2.  Press the [

 

OFF SRC] button to select the Bluetooth Phone 

function.

3.  On/off of the microphone audio loopback function changes 

whenever the [ALBUM v

 

2] button is pressed (“0” is dis-

played on the liquid crystal display).

ON

BTP 0

OFF

BTP