![background image](http://html.mh-extra.com/html/samsung/sgh-d520/sgh-d520_service-manual_1190469041.webp)
SAMSUNG Proprietary-Contents may change without notice
Flow Chart of Troubleshooting
9-8
This Document can not be used without Samsung's authorization
9-1-5. Speaker Part_1(MP3, SPEAKER PHONE)
There is no sound from the Speaker
Are there any signals at
the terminal of Speaker?
Yes
Replace the Speaker
No
Are there any signals at
the
R321, R322
Yes
Yes
Check
U303
What is the type of
sound from the
Speaker
Is there any
signals at the
C432, C433?
Is there any
signals at the
C436, C437?
MP3
SPEAKER PHONE
Check
UCD302
Check
U100
No
No
Check
U401
END
Yes
Yes
The pin #2 of
U401 is
"High"?
Is there any
signals at the
C434, C435?
Check
UCD301
Yes
MELODY
Are there any signals at
the
L300, L301
The pin#10 of
U401 is "High"?
Check
UCP200
No
No
No
No
Check
UCP200
Yes
Yes
Check
U401