- Joined
- Oct 30, 2022
- Messages
- 190
Samsung A50s walang sound sa youtube, facebook and others pati earpiece at mic not working.
See video
Before
https://www.youtube.com/shorts/2wPrJ8oRIho
Basic steps na ginawa (unsuccessful)
1.) Pinalitan mic
2.) Pinalitan earpiece
Since unsuccessful ung basic steps natin kaya proceed tayu sa motherboard troubleshooting
Open Borneo Schematics at tignan kung san ba nanggagaling ang signal nang mic at earpiece
At d2 makikita ang rail nang mic at earpiece, galing sa codec ic. pero hindi tayu agad nag change nang codec ic, troubleshoot muna and found out shorted yung 3.3v nang codec.
So d2 nman tayu next sa voltage injection, since 3.3v sya nag inject lng ako nang 1.3v 2ampere para safe, sa ilalim nang thermal camera


So ito nakita na natin yung area na may temperature change sa thermal cam pero wala tayung tatanggalin jan
Ito na yung Tricks na ginawa ko, since nag inject tayu nang 1.3v 2ampere, ginawa ko nag inject ulit ako 1.3v 3.5ampere and here's the result



After voltage injection (Current lng pinalitan ko pero same voltage) nawala na yung short to GND at working na dn earpiece at mic pati media sound
See Video
AFTER
https://www.youtube.com/shorts/cOsu9fYare0
Thanks for Viewing
See video
Before
https://www.youtube.com/shorts/2wPrJ8oRIho
Basic steps na ginawa (unsuccessful)
1.) Pinalitan mic
2.) Pinalitan earpiece
Since unsuccessful ung basic steps natin kaya proceed tayu sa motherboard troubleshooting
Open Borneo Schematics at tignan kung san ba nanggagaling ang signal nang mic at earpiece

At d2 makikita ang rail nang mic at earpiece, galing sa codec ic. pero hindi tayu agad nag change nang codec ic, troubleshoot muna and found out shorted yung 3.3v nang codec.
So d2 nman tayu next sa voltage injection, since 3.3v sya nag inject lng ako nang 1.3v 2ampere para safe, sa ilalim nang thermal camera


So ito nakita na natin yung area na may temperature change sa thermal cam pero wala tayung tatanggalin jan
Ito na yung Tricks na ginawa ko, since nag inject tayu nang 1.3v 2ampere, ginawa ko nag inject ulit ako 1.3v 3.5ampere and here's the result




After voltage injection (Current lng pinalitan ko pero same voltage) nawala na yung short to GND at working na dn earpiece at mic pati media sound
See Video
AFTER
https://www.youtube.com/shorts/cOsu9fYare0
Thanks for Viewing

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