Asus ZENFONE T500 Servicehandleiding - Pagina 26

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Asus ZENFONE T500 Servicehandleiding
ASUS T500

19. Fail to identify earphone/Handset MIC failure

Solution:
1
Replace the earphone socket and test again the earphone function
2
Check if the earphone socket has soldering deviation, high floating or is damaged
3
Check if the related components of earphone are obviously poorly soldered or the earphone socket is
damaged
4
Measure CDC_HS_DET voltage before and after the earphone cable is inserted; voltage before: 1.8V/ voltage
after: 0V
5
Replace the earphone socket and test again
6
Add soldering or re-solder or replace CPU
earphone socket
WIFI/FM/GPS IC U3302
MB Service Manual
26