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Old 12th May 2010, 08:21 PM   #1
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Default Making a solid state safe to work on when you can't reach the caps

I've learned me lesson of not de-charging caps when working on amps before (ouch), but I'm going to fix my tech21 trademark 60 dodgy pot and can't get to the caps to discharge them without taking out the circuit board.

Anyone got any tips for being super safe?
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Old 13th May 2010, 06:04 AM   #2
Mooly is offline Mooly  United Kingdom
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Just measure on the PCB and see if any voltage present... from a practical point it's SMPS (Switch mode power supplies) that are the real problem for retaining charge on the primary side. If there are electroylitic caps with 400 vdc working written all over them that tells you what to expect... and if that's the case and you are unsure what you are doing then the safest answer is that you shouldn't really be working on it at all.

Any "normal" linear amp and PSU (never heard of tech21) discharges it's reservoir caps in a few 10's of seconds at most.
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