Hi,
Found this site while searching on issues with a SVI 3205.
I have a SU-V670 on the table, which goes into protection mode after running for a few minutes.
I measured the output of the SVI 3205 on pin 3, and found approx -40VDC… it changes more negative as the unit heats up.
I removed the SVI 3205 to make sure it didn’t cause problems, but I still have DC on the output
I have removed and checked Q452, Q460 and Q464, as I have close to negative supply on the collector of Q452 and base of Q460/464.
IC401 is also running very hot. I have -58VDC on Q402, which I can’t figure out how it’s possible - any ideas?
I have attached a part of the schematics…
As a side note - I do have a degree in electronics, but I haven’t worked with it for more than 25 years… I’m a bit rusty.
Found this site while searching on issues with a SVI 3205.
I have a SU-V670 on the table, which goes into protection mode after running for a few minutes.
I measured the output of the SVI 3205 on pin 3, and found approx -40VDC… it changes more negative as the unit heats up.
I removed the SVI 3205 to make sure it didn’t cause problems, but I still have DC on the output
I have removed and checked Q452, Q460 and Q464, as I have close to negative supply on the collector of Q452 and base of Q460/464.
IC401 is also running very hot. I have -58VDC on Q402, which I can’t figure out how it’s possible - any ideas?
I have attached a part of the schematics…
As a side note - I do have a degree in electronics, but I haven’t worked with it for more than 25 years… I’m a bit rusty.
