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Old 21 May 2018, 10:20   #1
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Rev. 6 MC68060 runs hot causing instabilitiy (Blizzard 1260)

I'm struggling with the bizarre problem of my Blizzard 1260. Suddenly it started to be unstable and I found that the MC68060 (Rev. 6), which was running at 50MHz and was just lukewarm, suddenly overheats. I would like to ask local experts what could have gone wrong? Does this mean that my processor is dying or is there something wrong with the card itself?
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Old 21 May 2018, 10:25   #2
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Throwing guesses in the dark, but measure the voltage regulator's output to see if it's putting out too much.
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Old 21 May 2018, 11:13   #3
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So I measured the values on the voltage regulator and these are the following: at the input 4.93V, at the output 3.30V. I guess the problem is somewhere else. I also tried to measure the processor frequency in Whichamiga. The two crystal oscillators I tried (the card has an oscillator socket) show 50MHz, so I would exclude a malfunction on them. I also noticed that the MACH chips near the CPU socket are more heated.
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Old 16 June 2018, 21:53   #4
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Would be interesting, what the problem was. Have this card with Rev. 6 68060 too!
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