Optical Pick-Up Section; Optical Pick-Up; Test Mode - Sony MEX-BT39UW Service Manual

3-12. OPTICAL PICK-UP SECTION

2 optical pick-up section
1
– bottom side view –

3-13. OPTICAL PICK-UP

2 leaf spring (sub guide)
5 optical pick-up
Notes for Assembly
Prevent the end of the
leaf spring (sub guide) from being
in contact with the OP slide base.
MEX-BT39UW/BT3900U/BT3950U
Note: Be careful not to touch the lens and hologram
terminal when removing the optical pick-up section.
1 pan tapping screw
(M 1.4 2.5)
3 leaf spring (OP)
4 lead screw assy
– bottom side view –
Prevent the end of the There is space at the end of the
leaf spring (sub guide) from being leaf spring (sub guide) to avoid
in contact with the OP slide base. contact with the slide.
SETTING THE TEST MODE
Setting method:
1. Press the [SOURCE/OFF] button for 1 second to turn the pow-
er off.
2. Press the [4] → [5] → [1] buttons sequentially (the [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 [SOURCE/OFF] 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 [SOURCE/OFF] button to select the Bluetooth Phone
function.
3. On/off of the microphone audio loopback function changes
whenever the [2] button is pressed ("ALBM" is displayed in
the liquid crystal display).
LOOPBACK ALBM
ON Lit
OFF None
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 occurs
when this detection circuit is broken.
Procedure:
1. Enter the test mode.
2. Press the [SOURCE/OFF] 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).
In this state, when the external microphone is pulled out, the
beep sound is output.
19 19
MEX-BT39UW/BT3900U/BT3950U
SECTION 4

TEST MODE