EEVblog Electronics Community Forum
Products => Test Equipment => Topic started by: Mrt12 on February 12, 2017, 09:44:53 pm
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Hi,
i measured a 300V signal with this oscilloscope using a 10:1 probe. I thought it should be fine since the scope's inputs are rated for up to 150V. But it was NOT fine :-( I used channels 1 and 2. Channel 2 is still fine, but channel 1 has a strange offset now and it looks like it has an AC coupling - DC coupling is no more possible. For me this looks like the internal attenuator or so is damaged. The scope self test tells me that the preamp test fails. But only for channel 1, all other channels are OK.
I would like to ask whether
a) somebody has managed to repair such a scope, or
b) if somebody has a replacement board A1. Because the service manual doesn't give any schematics, it just tells to replace the PCB... What could I do? I already looked on ebay for a replacement part, but none is available. Keysight will not have one as well because the scope is obsolete.