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4.8 Speaker Trouble
SETTING: Connect PIF to the phone, and Power on. Enter The engineering mode, and set
"Melody on" at Buzzer of BB test menu
START
Enter into Engineering Mode and
go to menu "BB test => Buzzer => Melody on"
Voltage acro ss C229
= 3.3 V?
Yes
Voltage acro ss C230
= 2.8 V?
Yes
Check the si gnal level
Of C222,C223. Are they
a f ew mV?
Yes
SPK_SEL signal is high?
Yes
Check the contact
State of speaker. Is it OK?
Yes
No Trouble
No
Check the soldering of
U206. Is it OK?
Yes
Replace U206
No
Check the soldering of
U202. Is it OK?
Yes
Replace U202
No
Replace U204
No
Check the sol dering state
of U203 and R217.
Is it O K?
Yes
DBB is out of order.
Change the board.
No
Replace speaker
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4. TROUBLE SHOOTING
No
Re-solder U206
No
Re-solder U202
Resolder the U203
No
and R217.
Otherwise change it.
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