Sony STH40D Operating instructions
Troubleshooting
Open-ear Stereo Headset
STH40D
Contents
The headphones aren't comfortable to wear.............................. 3
2
The headphones aren't comfortable
to wear
•Make sure that you wear the headphones according to the wearing instructions.
To wear the headset
1Hold the sound duct of the headphone (R) with your left hand.
2Gently pull down your right earlobe with your right hand.
3Slide the headphone from below so the driver unit goes behind your ear,
then insert the ring supporter into your ear as shown in the illustration.
4Put on headphone (L) using the same procedure with opposite hands.
For your safety, do not use your headset to handle calls while you are driving. To prevent
accidents, it is not recommended to use your headset while walking, running or cycling.
To take o the headset
•Hold the sound duct of the headphone (R), then gently slide it down to take
o the headset.
Do not hold the driver unit when taking o the headphone. Holding the driver unit when
taking o the headphone may put stress on the sound duct, causing it to break.
•Make sure that the clip is attached correctly.
3
To attach the clip
•Attach the clip to the headset cable below the remote. Position the clip so
that you can speak into the microphone for taking calls hands-free, once the
headset is fastened to your clothes.
If you need to adjust the clip, remove the clip and reposition it on the headset cable.
Use the clip to stop your headphones and remote from moving around. This makes the
headset more comfortable to use.
•Make sure that the ring supporter is the right size and that you have assembled it
correctly.
To change the ring supporter
4
1Choose the ring supporter size that fits stably and comfortably in your ear.
2To remove the ring supporter, firmly hold the part of the sound duct where
the ring supporter is attached, then push the ring supporter straight
backward.
3To attach the ring supporter, align the convex part of the headphone with
the concave part of the ring supporter.
4When attaching, cover the hook A with the rubber of the ring supporter as
shown in the illustration. Make sure not to tear the ring supporter.
When removing or attaching the ring supporter, do not forcibly pull, push, or twist the ring
supporter, as this can damage or tear the ring supporter. When attaching, make sure the
right/left marks on the ring supporters match the marks on the headphones.
5
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