Test Mode - Sony DSX-GS900 Service Manual

DSX-GS900
SETTING THE TEST MODE
Setting method:
1. Connect the power cord to the regulated DC power supply, and
turn the power on of this unit.
2. Press and hold the [ OFF SRC] button to the state of source off
(the clock is displayed on the liquid crystal display), enter the
test mode by pressing the buttons in order of the [
5] → [ V ALBUM 1] (press only the [ V ALBUM 1] button for 2
seconds).
3. It is set to the test mode, and all segments of the liquid crystal
display light.
Screen display
Releasing method:
Press the [ OFF SRC] button for 1 second.
[ OFF SRC]
press for
1 second
24
SECTION 4

TEST MODE

+
–
Regulated DC
power supply
4] → [MIC
[ 4]
press
[MIC 5]
press
[V ALBUM 1] press
for 2 seconds
MICROPHONE AUDIO LOOPBACK
To confi rm the state of the external microphone used when a hands-
free function is used, the microphone audio is output from the speak-
er.
The breakdown judgment of the microphone can be done without
connecting H/F with the smartphone or cellular phone.
Procedure:
1. Connect a speaker and external microphone to this unit.
2. Enter the test mode.
(Refer to "SETTING THE TEST MODE" on the left)
3. Press the [ OFF SRC] button to select the "BT PHONE" func-
tion.
[ OFF SRC]
press
4. On/off of the microphone audio loopback function changes
whenever the [ALBUM v 2] button is pressed.
Note: Display window will not show the status indication of the microphone
audio loopback function on/off.
[ALBUM v 2]
press
5. Input voice to the external microphone with the microphone au-
dio loopback function "ON", and check that voice is output from
the speaker.
Sony CONFIDENTIAL
For Authorized Servicer
SYS SET