(l193sab-al**t) l173sa (l173sab-al**a) l173st ... - MobRepair.ru
(l193sab-al**t) l173sa (l173sab-al**a) l173st ... - MobRepair.ru
(l193sab-al**t) l173sa (l173sab-al**a) l173st ... - MobRepair.ru
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4<br />
6<br />
8<br />
4<br />
Waveforms<br />
NO SOUND<br />
CHECK<br />
THE INPUT SOURCE<br />
PASS<br />
CHECK U901(1.8V)?<br />
PASS<br />
CHECK U902(3.3V)?<br />
PASS<br />
CHECK U601 PIN101<br />
PASS<br />
CHECK U201 PIN 14, 15,<br />
22, 23, 38, 39, 46, 47)<br />
15V?<br />
PASS<br />
CHECK THE<br />
INPUT/OUTPUT OF<br />
U201<br />
PASS<br />
CHECK THE SPEAKER<br />
PASS<br />
CHECK THE SPEAKER LINE<br />
4. NO SOUND<br />
FAIL<br />
FAIL<br />
FAIL<br />
- 17 -<br />
CHANGE SOURCE INPUT<br />
CHECK 1.8V LINE<br />
CHECK 3.3V LINE<br />
FAIL RE-SOLDERING OR<br />
CHANGE THE DEFECT PART<br />
FAIL<br />
FAIL<br />
CHECK 15V LINE<br />
FAIL RE-SOLDERING OR<br />
CHANGE THE DEFECT PART<br />
CHANGE SPEAKER<br />
U901 6 U601-#101 8 U201-SPEAKER OUTPUT
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