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+--- Thread: pinecil v2 reverse polarity issue (/showthread.php?tid=19419)
pinecil v2 reverse polarity issue - adamsk1952 - 09-12-2024
Hello everyone.
I'm looking for a little help repairing my pinecil v2.Unfotunately I made the mistake of pluging a wrong polarity adaptor in my pinecil causing it to blow.
I replaced the mosfet.(U13 on schematic),the buck converter (U8) and the LDO regulator (U5) still not working.
After doing a little probing I found there was 19v input at pins 2,4,7 and 8 but no 5v at pins 5 and 6.?
Moving on to the buck converter (U8) I have 19v in at pin 5. but I seem to have pin 6 shorted to ground at pin2. Looking at the schematic pin 6 goes through the inductor to LDO(U5) which i presume is not pulled to ground. This is a new replacement buck converter but i don't believe pins 2 and 6 should be connected together.Is this a faulty chip or am I wrong ?
Any help would be greatly appreciated.