Quote:
Originally Posted by Don_Zalmrol
The noise was on all wavelengths including the gram input.
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OK, so the gram input was also affected. In that case I would proceed with the reservoir/smoothing electrolytic capacitors in the power supply that you have noticed has black scorching around it. It has clearly been overheating for some reason and it is not just a case of replacing it without finding out the cause of the overheating as well.
However, to make a start I would replace the two 50uF electrolytics C1 and C2 you have already identified and the 8uF electrolytic C3 as well. Check the values of resistors R1 (120 ohms) and R66 (10k) and replace as well if necessary.
Quote:
Originally Posted by Don_Zalmrol
Can I use two elco's of 47uF @ 350VDC
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Yes that is perfectly acceptable.
Regards