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FeelTech FY6600 60MHz 2-Ch VCO Function Arbitrary Waveform Signal Generator

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soundtec:
All the schematics are here , along with other information about mods etc .

https://github.com/DerKammi/FY6600-15-30-50-60M

find schematics in 'hardware' section.

Check the soldered ribbon between the front board and the screen ,could be an issue there .

svetlov:
Hello Dear Friends! there is a small video  :) model 6800

soundtec:
Hi Svetlov,

I watched your video ,unfortunately my Russian language skills arent good ,so I didnt understand much .
I noticed you improved the psu caps , and later in the video you seemed to be adjusting the calibration ,
Did you find anything interesting ,or ways to improve accuracy ?

svetlov:
hi dear :) soundtec :) ! sorry for the delay in response  - this is not my video
 the author of the video says - after replacing the capacitors - significantly reduced voltage ripple but regular chokes severely limit the current to 5 volt power bus-and in his opinion require replacement-would need Chokes are more powerful, rated for a larger current
 -but he himself in the future intends to replace the switching power supply to a linear

cpposteve:
Hi all. Very late to the party here. So late everyone’s probably gone home 🤔. Anyway. I bought one of these nearly a year ago. Used it a few time for say half hour. Put it away and forgot about it until now (10 months on)
I today took it out of the box. Powered it up and to my horror nothing on the screen or front panel all together. I get the couple clicks on power up but nothing on the front end. Checked psu voltages and both 5v are spot on. -12 is -13.1 and 12v is 13.1v. Any help would be very helpful. I was following this thread up until 8 months ago and seems a lot of trawling through. Cheers.

Steve

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