TRANSISTORS
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Company no longer in business here in the US.
This is a product that heats up and dries wet ski boots,
the board powers 2 big heat guns I guess with programmed cycle
times. No SM or schematic of course.
Main bridge was shorted, seems directly fed from 115V line power.
Replaced the bridge with a thru hole type and hooked up with a variac to power.
At one point the panel lit up with power, then there was a snap
and thought I saw sparks from the 2 large heat guns in the chassis,
then dead. Fuse blown - bridge shorted again.
Seems like they are using a IC on the boards
to handle the switching side of the SMPS, its a Viper35SP
made by St electronics:
http://www.st.com/content/ccc/resource/technical/document/datasheet/4b/ee/d2/34/15/48/4e/66/CD00144872.pdf/files/CD00144872.pdf/jcr:content/translations/en.CD00144872.pdf
Looks like its obsolete / NLA from what I can see so far. Some on Ebay for purchase.
I think the IC runs straight from the line power, rated at 800V.
Should I try the support components around the IC or try replacing the IC?
I am thinking the heat buildup perhaps caused the smd caps to dry out?
Ez egy motoros kerekesszék töltője.Van-e valakinek rajza hozzá? A pufferen meg van a feszültség,a kimeneten 1,8V.Eddig minden alkatrészt jónak vélek,amit mértem.Javított-e valaki ilyet?Mik a tapasztalatai? A töltési állapotot jelző led ötlet szerűen hol piros ,hol sárga.