Speaker Part - Samsung SGH-Z720 Service Manual

Flow Chart of Troubleshooting

9-8. Speaker Part

Speaker does not work
C534, C536 ≥ 2V?
(When MP3 file is played)
U501 Pin 1A, 2A ≥ 2V?
(When MP3 file is played)
HDC600 Pin 56, 58 ≥ 2V?
(When MP3 file is played)
Check the signals of
Is Speaker working?
Yes
Yes
Yes
Yes
speaker input
OK
Yes
END
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No
Check UCP300
No
Resolder U501, C534, C536
No
No signal
Check the circuit related to
No
Change the Speaker
9-14
Resolder U500
melody signal