Re: CBM 710: Replacing Power Supply - Help Needed

From: Michał Pleban <*lists_at_michau.name*> Date: Sun, 22 Apr 2018 23:46:57 +0200 Message-ID: <5ADD02D1.2040208@michau.name> · lists_at_michau.name

William Levak wrote:

> Wait a day and try again.  When the voltage regulators shut down, they
> must get good and cold before they will turn on again.

I waited a day and the same happened, but when I turned my computer on
yesterday, it powerd up fine. But since it appears that the PSU is not
very reliable, I decided to replace it anyway.

So, I replaced my failed 720's power supply with a Mean Well RT-125B
power supply and a little circuit based on NE555 generating 50 Hz clock.
The computer runs fine. The PSU gets quite hot after some time, I
removed the fan but I think I have to put it back. Otherwise, no
problems so far.

Regards,
Michau.