68kMLA Classic Interface

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Another SE/30, another boot issue

Posted by: bibilit on 2016-09-26 13:11:36 I have a friend's SE/30 at home, no booting, no chime with a simasimac pattern: No big deal, caps were original ones, replaced all of them, but didn't worked. after looking a couple of things, pressed down the reset button and it booted right away: the SE/30 is working great once this has been done, but if it's turned down it will go back to the former state of no chime, no boot. It will boot each and every time with the reset trick. Any idea ?

Posted by: techknight on 2016-09-26 14:13:49 yea you need to check the traces and voltage supply to the SONY chips. one of the two SONY chips are responsible for RESET management.

Posted by: bibilit on 2016-09-26 22:32:41 Thanks, yes looking at the schematics yesterday evening and came to the same conclusion, UB11 IIRC.

Posted by: bibilit on 2016-10-01 02:06:16 Solved. Cleaning UB11 pads (and UB10 as well) got me a fully working unit (traces and voltages were ok otherwise) Nice startup screen !

Posted by: techknight on 2016-10-01 07:44:26 Yay! I figured it had something to do with that area, just not sure what.

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