Hp3314a function generator front panel display not working. So i checked the rail voltages. I hv when all other boards are unplugged +15 -15 +5 volts rails showing correct voltages across the cap on +24 v rail i hv +31 volts and across the cap on -24v rail -32 volts and the led comes on on the board. However when plugging in the other boards the voltages drop and the led does not light also no readout on the front panel the voltages show +15v = 11 v -15v = -1 v +5v = 0.5 v across cap on -24v rail = 0 v and across cap on +25v rail = +30 volts… could you help where i need to check whats causing this please
It sounds like supply rail short. I would start with replacing all Tantalum capacitors, they have a tendency to fail short, if that doesn’t fix it then I would check the temperature of the parts to see which ones are getting warm.
Thanks for the advice, ref tantalums what about the sealed ones? Do thry need replacing because i see these as very expensive or can i use regular tantalums fir those
Just a quick question is it ok to replace the tantalums using the same uf but instead of 25volts using 35volts