It's marked as Q4 so I think is a transistor or something like this. Tester return unknow or damage component, what kind of transistor is ?
It's possible it's a TI431 ?
It's possible it's a TI431 ?
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Last edited by jasko_jacker; 10-24-2019, 09:57 AM. -
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Re: Unknow transistor
Is the component itself marked as Q4 or is that its designation on the board? Got a picture?Comment
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Re: Unknow transistor
Which mobo?? Any code/laptop model??Comment
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Re: Unknow transistor
sorry there was a photo upload errorAttached FilesComment
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Re: Unknow transistor
my guess tl431Comment
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Re: Unknow transistor
Not quite sure. Take a look at the datasheet for sot23 markings. Search for PACKAGE OPTION ADDENDUM in the pdf.Originally posted by vinceroger69 View Post
TL431 is a voltage reference and wouldnt be marked as "Q" on the board.
OP: Try to get a schematic for that laptop. The circuit will tell you more.Last edited by KvnTM; 10-25-2019, 05:20 AM.Comment
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Re: Unknow transistor
I would also say it's a tl431 reference ic, I suspect it it in the secondary of a smps near the optocouplerComment
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