B&K 2534 DSO channel failing
I've got a four year old B&K 2534 DSO with the second channel losing it's high frequency response (all the way down to audio frequencies) as it warms up. I noticed this recently when I was running a 1KHz test on an amp. The leading edge started rolling off.
I suspect a component is failing and sensitive to temperature, which makes isolation a bit easier. Warm it up, put a signal in and start at the input testing components with "cool-spray".
I emailed B&K requesting a schematic, but they have not responded.
Does anyone have a schematic for this DSO?
CH2 is now off the screen.
B&K did not respond to my request for a schematic.
B&K wants $350 to repair it.
I'll probably get another scope. Maybe a Rigol DS1102E.
I think I'll pop the top on the B&K to see what it looks like inside.
I opted for a Tektronix 465M instead.
I may try to diagnose the B&K with it even if the parts do not have markings. At least I can isolate where the fault is. If a schematic ever becomes available I'll try to fix it.
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