Speaker Part_1(Mp3, Speaker Phone) - Samsung SGH-E790 Service Manual

Flow Chart of Troubleshooting

3-1-5. Speaker Part_1(MP3, SPEAKER PHONE)

There is no sound from the Speaker
Is the terminal of Speaker
Are there any signals at
the L500, L501 in LCD
No
Is there any signals
at the pin#R13,R14
②
The pin #5, #7
of IC9 in LCD is
Check U100
O.K ?
Yes
Yes
MP3
What is the type of
sound from the
of U100 ?
Yes
No
"High"
Yes
Check
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No
Replace the Speaker
①
No
Check
SPEAKER PHONE
Speaker
Is there any signals
at C121, C122 in
No The pin #5, #7
of IC9 in LCD is
④
UCP201
END
3-10
IC5
No
LCD?
Yes
②
Check
"High"
Yes
U101