P.S. It doesn't behave like a common transistor when tested in-circuit with a multimeter; I don't get the usual 0.6-0.7 diode forward voltage readings. Also, the part notation printed on the silk screen says "U1" which is usually used for IC's.
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3 pin device near the USB port could be a voltage regulator, probably a low-drop regulator from 5V (USB) to 3.3 V (internal voltage of the pen). A quick internet search suggests the manufacturer of the chip was Anachip, now acquired by Diodes. But I couldn't fin more information with my quick search.
Check input and output voltages. If they match my hunch, the chip is propbably o.k.
Check input and output voltages. If they match my hunch, the chip is propbably o.k.
Hello Herald,
I'm actually surprised how you could look it up in the net by a quick search I also looked it up using google and found no trace what so ever.
Anyway, I very much appreciated your input. I will follow the lead you've provided. Thank you so much.
Cheers
3 pin device near the USB port could be a voltage regulator, probably a low-drop regulator from 5V (USB) to 3.3 V (internal voltage of the pen). A quick internet search suggests the manufacturer of the chip was Anachip, now acquired by Diodes. But I couldn't fin more information with my quick search.
You were absolutely correct. The component was indeed a 5 to 3.3 converter/regulator, and it seems to be working normally. I guess the main memory chip is the issue.
Thank you again, and kind regards.
Hello Harald,
You were absolutely correct. The component was indeed a 5 to 3.3 converter/regulator, and it seems to be working normally. I guess the main memory chip is the issue.
Thank you again, and kind regards.
