Hey Rich,
Matt D'Asaro fixed at least one attenuator in a TDS-420 that was similarly
bad. The article is here:
. The images
don't load for me, but you can still view them at these links:
Good luck,
Siggi
On Fri, Apr 30, 2021 at 8:55 AM Richard Peterson <saaber1@...>
wrote:
Hi Folks. New member, first post . . . I recently picked up a couple of
new to me Tektronix scopes to replace my Hitachi V212. The 2236 is up an
running beautifully after some cleaning, but the TDS380 has a (hopefully)
small issue: No input on CH1. I've traced the problem down to what looks
like a burned 50 ohm thick film resistor on the input of the attenuator
board between the BNC and one of the capacitors on the board. (not quite
sure how to post photos here yet but hopefully this link works:
/g/TekScopes/photo/263498/3215960?p=Created,,,20,2,0,0)
I'm thinking I can simply solder a 50 ohm resistor between the BNC
connector and the SMD capacitor that the original resistor links (the
larger capacitor at the end of the first relay in the photo) . Any
thoughts about doing this and what power rating the resistor should be?
Thanks.
Rich
