Speaker Part - Samsung SGH-T519 Service Manual

10-1-6. Speaker Part

There is no sound from speaker
Is the connector
HDC401 O.K?
YES
Are there any signal at
L405, L406?
NO
Are there any signal at
R437, R438?
YES
YES
Are there any signal
at the pin #15, 16 of UCD401?
NO
Are there any signal
at the pin #5,6,7 of UCD401?
NO
YES
Check UCP201
The frequency at R433
NO is 13MHz?
⑤
YES
Check U101,
R124, C140
C453 = 3.3V?
NO
⑥
YES
Check Q401
C445 & C446 = 1.8V?
NO
⑦
Check U302
⑧
Replace UCD401
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
①
NO
Reconnect HDC401
yes
Check & Replace
L402, L403, HDC401
NO
R442 is high?
The type of sound from the speaker
is Melody, Mp3?
YES
YES
Pin #2 of UCD401
is Low?
NO
YES
Check UCP201
Replace UCD401
10-13
Flow Chart of Troubleshooting
NO
NO
The voltage at
L404 >3.7V??
YES
NO
Are there any signal
at the pin #3,9 of U402?
④
NO
Check and replace
Check UCP201
②
Check & replace L404
③
Check & replace U401
NO
U402 & R427