Sony MEX-XB100BT, Service Manual

Page: 32 / 68

MEX-XB100BT
32
SECTION 4
TEST MODE
SETTING THE TEST MODE
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 con fi 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).
LOOPBACK DISPLAY
ON
BTP 0
OFF
BTP