Test Mode - Sony MEX-BT3100P Service Manual

MEX-BT3100P/BT3100U
SETTING THE TEST MODE
Setting method:
1. Press the [ OFF SOURCE] button for 1 second to turn the
power off.
2. Press the [SHUF 4] t [MIC/ZAP 5] t [ V ALBUM 1] but-
tons sequentially (the [ V ALBUM 1] button is pressed for two
seconds).
3. It is set to the test mode, and all segments of the liquid crystal
display light.
Releasing method:
Press the [ OFF SOURCE] button for 1 second.
MICROPHONE AUDIO LOOPBACK
To confi rm the state of the external microphone/internal micro-
phone 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 SOURCE] 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 ("ALBM" is
displayed in the liquid crystal display).
LOOPBACK
ON
OFF
THE EXTERNAL MICROPHONE DETECTION STATE
DISPLAY
Connected confi rmation of the external microphone detection line
is done.
The trouble that doesn't change into an external microphone oc-
curs when this detection circuit is broken.
Procedure:
1. Enter the test mode.
2. Press the [ OFF SOURCE] button to select the Bluetooth
Phone function.
3. Plug in the external microphone into the MIC IN terminal.
4. The detection state of the external microphone is displayed in
the liquid crystal display ("TRACK" is displayed).
For MEX-BT3100P "TRACK" still show every time when
pull out and pull in external microphone.
20
SECTION 4

TEST MODE

ALBM
Lit
None