Hi Guys
OK. As the thread title says this particular set has me stumped..
Smoothing cap removed and set will start up and run (albeit with a humbar). As in an open Smoothing Cap scenario.
With Smoothing Cap in circuit on start up....set trips. And will not start up.
Take Smoothing Cap out....start set....and reconnect Smoothing Cap after a few seconds...and all is good.
Perfect picture, perfect PSU regulation....EVERYTHING.
Obviously, a start up issue with the Chopper IC. I have tried two. From different Manufacturers. And they both do the same thing. And checked every component on the Primary of the Chopper. All is good.
Anybody have any ideas here???
This is probably the only time I will encounter this problem ever on a SMPS. And I would really like to know what you Folks think.
Kind regards,
tvtech
Diagram below as an attatchment. Please go to page 65 out of 66 and look in the top left hand corner. That is where the PSU is.
OK. As the thread title says this particular set has me stumped..
Smoothing cap removed and set will start up and run (albeit with a humbar). As in an open Smoothing Cap scenario.
With Smoothing Cap in circuit on start up....set trips. And will not start up.
Take Smoothing Cap out....start set....and reconnect Smoothing Cap after a few seconds...and all is good.
Perfect picture, perfect PSU regulation....EVERYTHING.
Obviously, a start up issue with the Chopper IC. I have tried two. From different Manufacturers. And they both do the same thing. And checked every component on the Primary of the Chopper. All is good.
Anybody have any ideas here???
This is probably the only time I will encounter this problem ever on a SMPS. And I would really like to know what you Folks think.
Kind regards,
tvtech
Diagram below as an attatchment. Please go to page 65 out of 66 and look in the top left hand corner. That is where the PSU is.