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Hi Barry, Now that you mention it, you may be right, and I may have misunderstood: maybe the AUTO generated sweep does not drain the capacitor. That would result in a much faster AUTO sweep than the

Hi Barry, Internal circuit diagram and block diagram of U520 is on TekWiki. Ozan

I almost have this TG501 Wrapped up I am curious if anyone knows if there is a modern replacement for the 156-0379-00. This are N8T06B LED display drivers? There is a fault in one of the chips. I have

I am absolutely not knowledgeable on your unit. What happens when you switch the channels with good cells in both channels? Does your bad channel symptoms follow the card/assembly that had the dead

Ah, okay. I didn't know that U520 did that without a trigger so Jeff's correct. That makes a difference and I don't think I saw that in the circuit description. Thanks, Barry - N4BUQ

Check the interlock switches. Glenn

Value on the HV cap is 0.95 uF +/- 3%.? Now I know the reason for that.? Thanks, Tom.? ? ? ? ?JimSent from my Verizon, Samsung Galaxy smartphone

Thanks, Tom.? Unfortunately I don't have a curve tracer, not yet anyway.? Tek 576 is on my wishlist, and I do know a guy nearby who has one in his storage unit.? But will check HV cap and diode

Hi again, and thanks for the heads-up regarding the 151-0367-00's. I'll look into those. Just been having another look and removed the 5v bridge rectifier, which unfortunately tested fine off of the

Here's how you know that you've misinterpreted how the trigger mode works. In your description, there's no way for a stable signal to be displayed in AUTO mode. In every scope I'm familiar with, AUTO

C535 is discharged even with auto-generated sweeps. Ozan

Hi Jim, I haven't fixed nearly as many microwaves as scopes, but more than a handful. For ovens using a traditional power supply with line-frequency magnetics, the most common failure mode is a

This is a common problem.? Chances are one of three things.? Bad capacitor, bad rectifier, bad transformer.? The transformer may be arcing due to high voltage.? The same for the capacitor.? You

Hi, everybody. Has anybody else seen this issue: one day recently, out of the blue, our Kitchen Aid microwave oven stopped working. One day it was fine, and the next day the display was blank, and the

Tnx Bob I changed the EHT unit years back, I had an idea , there was a rod , found the manual is on the Tek site , feels like the latch on the switch has jammed, as the button , depresses and releases

Hi Jeff, I'm not trying to argue and I know I'm probably the least likely one in this group to fully understand the circuit, but I way I understand it, as long as C535 is charged, the sweep starts

I believe there is a long plastic actuator with angles that goes to the rear and moves the switch.? The switch itself is nowhere near the button. The problem is either the switch itself is jammed or

And if that works.... maybe connect the sampler horizontal and vertical outputs to the respective plugin inputs - then the mainframe could selectively show either the sampler display or normal Yt

I'm looking for a set of 4 feet for a TDS5xx, TDS6xx or TDS 7xx scope. The part number is: 348–1110–04 If you have them available, please let me know (off list) your asking price including

As already mentioned, I have a new-to-me 5S14N. Yay. So far it seems that the horizontal section and triggering work as expected but it has a few problems in the vertical section. I certainly haven't