Do you have anough load on the _+5V_ supply? Remember,
these supplies
regulate the 5V output (that's the one that's fed back to the error
amplifier on the 3524 chip), and the other outputs follow along. If you
don't give the 5V supply enough load, the supply doesn't have to 'work
very hard', and the other outputs tend to be low.
I have loaded all the outputs : on +5 the load is about 3A.
I have try to increase the load, but no effect.
Alos check the output capacitors. A dried up one will
cause all sorts of
problems.
All the electrolitic capatitors were replaced, was the first thing I do.
Without undervoltage protection for +12 and -12 the power supply work, with
load, I've tested it.
But isn't a solution bypass the protection :((( I don't want .
Alberto
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Alberto Rubinelli Mail : alberto at a2sistemi.it
A2 SISTEMI Web :
www.a2sistemi.it
Via Costantino Perazzi 22 Tel 0321 640149
28100 NOVARA (NO) - ITALY Fax 0321 391769
Il mio museo di vecchi computers/My old computers museum
http://www.retrocomputing.net
ICQ : 49872318 Skype : albertorubinelli
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