![background image](http://html.mh-extra.com/html/samsung/gt-b7722-i/gt-b7722-i_service-manual_1192179030.webp)
SAMSUNG Proprietary-Contents may change without notice
Level 3 Repair
8-21
This Document can not be used without Samsung's authorization
8-3-6. Speaker Part
Check L406 and L407
produces signal (voltage)
(Wiring the SPK N/P and
checking an waveform using
oscilloscope)
Speaker does not work
No
Yes
No
Resolder L406 AND L407, ZD402, ZD403
(be possible because of soldering not well)
Yes
Does not work spkaer
mode and receiver mode?
(*#0*#
→
check receiver
and speaker)
select the Call ringtone)
Resolder or Replace UCP200, U403
(be possible of soldering not well or being
UCP a bad sample)
No
Yes
END
Yes
Is Speaker working?
(Listening through the
speaker)
Change Speaker ASS'Y
(be possible of SPK Problems
or not inserting it right.)