NPM-5
UI Module Troubleshooting
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External Mic
Malfunction
(Stereo Headset)
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Mono Headset
Malfunction
Replace a good
mono headset and
test it
Is the new
mono headset
working?
NO
Check B2B connector. Ensure the
connectivity of XEARP, XEARN
(Pin29 and pin 28 of J301) and
XMICP, XMICN (pin 26 and pin 25
of J301) to the UI module
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Replace and test
with a good stereo
headset with mic
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YES
Replace the mono
headset
Check FL602 and
FL603 soldering
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PAMS Technical Documentation
Is the new
YES
stereo headset
working?
NO
Check B2B connector. Ensure
the connectivity of XMICP,
XMICN (Pin26 and pin 25 of
J301) to the UI module
Is HDC5_INT
voltage correct when
headset is plugged
in?
NO
Check R609, R615
and R610
Replace the stereo
headset
Check FL603 and
contact of system
connector (J603)
to the UI module
Check system
YES
connector's
contact on UI
module
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