Hello everyone,
about a year ago, turning on my HP8563E spectrum analyzer, several errors appeared, including the ravenous error 334.
From research on the net, and a direct inspection, I found that the YTO model 5086-7906 was broken.
Pin 1, corresponding to 4 of connector J3, of the 5 VDC power supply, appears to be shorted to ground.
About a month ago, I bought an HP8560E Spectrum Analyzer at a good price with the intention of using its YTO for my HP8563E.
In fact, the analyzer cost me as much as a used YTO!
Before mounting it, I checked that the voltages of +5V, +15V and -15V were present.
Then I mounted the YIG oscillator, checking several times that the connectors were mounted correctly. Which I always do when I reassemble an electronic instrument.
When I turned the spectrum analyzer back on, I found that the new YTO was also broken !! A check of the same confirmed this.
What could I have done wrong? Has anything like this ever happened to anyone? Is there anyone in the group who has experience with these damn YTOs?
Given that I'm not really fasting with electronic instruments, such a thing had never happened to me.
I contacted a local company that repairs the YTO at a price of around 800 euros but I'm afraid that if I don't find out the reason for the break, this too could break ...
