Junsun V1 pro 2 Android Auto Radio component identification
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S87 = STI9287
https://datasheet.lcsc.com/lcsc/2009...87_C842664.pdf (datasheet)
https://www.taobao.com/list/item/744174915443.htm (photo) -
Is B2F the Vdd supply for the SoC (CMS8S6990)?
https://www.semiee.com/file2/b200ba7...9xx_V1.0.6.pdfComment
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I would be concerned as to whether Vin has punched through the ICs and clobbered the loads. To this end I would measure the resistance between Vout and ground, and between Vin and Vout.Comment
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Can you determine the pinout?
It might also help to measure the feedback resistors, as this could tell us the FB reference voltage. Common examples are 0.6V and 0.8V.
It would also help to know which chips are powered by this IC, as that might tell us the output voltage.
Lastly, it might be worth identifying the manufacturers of other ICs, in case the designer used the same IC maker.Comment
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B2F5dc = MT3540-F25
https://www.lcsc.com/datasheet/lcsc_...25_C883495.pdf (datasheet)
https://pl.aliexpress.com/item/10050...yAdapt=glo2pol (photo of MT3540-F25)
https://aliexpress.ru/popular/mt3540.html (photo of MT3540-F23)Comment
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by shelby5041hi
ive got a modern digital clock radio approx 15yrs old
my question is how long can a clock radio or a simple radio last ss farcas operating hours?
since elec components have limited hour lifecspan i would imagine the radio or clock radio would eventually fail.
the reason i ask is because i have my clock radio on radio function 24/7 for the past 7 years and its still working fine....i leave the radio on ..never turn off past 7years...thats approx 60000 hours
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by elviscenHi to all,
Anyone have some advice what can be wrong if Car auto radio Alpine CDE-170R have no sound output?
All works fine, mute disabled, also change cables, ...
I connect it on my bench and connect new speakers, all setup on the Auto radio are correctly setup-ed, just no sound output.
Inside nothing burned.
Any advice what can be wrong?
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Best regards,
Elvis C.-
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Hello All,
I have an issue with my Majority PETERHOUSE GRADUATE Internet Radio, it keeps rebooting at the boot logo Welcome screen. I have an another forum active in other website but due to lack of response I am posting the same here. I am positing a link below that has pictures including all the troubleshooting I have tried, appreciate if someone can take a look and give me any suggestions.
https://www.hifivision.com/threads/m...-screen.98243/
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by MufasaHello Everyone,
I can't find out who makes fets with the marking "ON" can some help.
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Channel: General Computer & Tech Discussion
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