Samsung SGH-F250 Service Manual page 43

Flow Chart of Troubleshooting
9-6. Speaker Part(Melody)
Speaker does not work
No
Is the terminal of speaker
check the specker
OK?
Yes
①
No
Check the
SPK_P & SPK_N
Resolder SPK_P & SPK_N
"HIGH"
Yes
②
No
Check the output circuit
Change or resolder around U404
of U401(Audio AMP)
Yes
③
No
Check the input circuit of Change or resolder around U403,
U404
U401(Audio AMP)
Yes
No
Change speaker
Is speaker OK?
Yes
END
9-15
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