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Schott KL 1500LCD displays error err2

Hello thanks for helping me.

At first, the main fuse blew every time i tried to turn the device on, i found diode bzw063b shorted, i replaced it and now the device can turn on but the message ''err2'' appears in the LCD, the fan works and IC u2009b gets too hot, i couldn't find that IC here in mexico city so i couln't replace it.

According to the manual that error is about overheating, but nothing apart that IC is hot, if anybody can help me finding that IC i'll be very greatful.
Any ideas?

Thank you very much

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