Re: TDS 380 won't trigger
Thanks Siggi,toggle quoted messageShow quoted text
I wrote that e-mail just before I turned off the computer last night. I should have added information about error messages.
On power-up I get the following messages:
Pass -- Powerup Checks
Diagnostics gives me the following messages:
Front Panel: Pass
The Error Log has the following failures, consistently:
I don't see anything referring to a checksum or NVRAM failure.
Looking at the acquisition board, the only electrolytic caps I see appear to be at the analog inputs.
This is the first time I've opened this 'scope up, and I'm amazed - it's mostly empty space! Even the CRT is tiny!
Any thoughts would be appreciated.
Sent: Saturday, June 23, 2018 7:09 AM
Subject: Re: [TekScopes] TDS 380 won't trigger
the NVRAM is checksummed, and if the NVRAM fails, the scope should display
an error at power-up.
If the scope is not displaying an error, then more likely this is due to
SMD electrolytic capacitor leakage that has started shorting things and/or
eroding traces. See e.g. this <
of capacitor and other problems in 400-series scopes.