TDS 540 Power supply caps?

[Spence]

Hello all,,, I picked up a TDS 540 for 85 bucks and it had 3 errors on the self test. I took it apart and washed the boards and did not see any damage on the PCB's. tested again and booted with out errors and I then replaced all the caps and it's working just fine.

My question is,, Should I go through the power supply and replace the rest of the caps? I haven't seen much about doing that.

Thanks for you time!!

[nctnico]

Leave the PSU as it is. Only the surface mount electrolytic capacitors on the CPU board, acquisition board, RS232 board and front panel are problematic. Note that a few electrolytics on the front panel have a higher voltage on them than the capacitor is rated for (see the TDS520B component service manual).

[Spence]

Thanks for the reply,,

[snoopy]

This might give you some ideas SMPS from a TDS420 being rebuilt.