Hello,
My beloved PVM died :-(. Audio and controls are working, but no picture.
When I switch it on I can hear the typical high voltage noise, then its gone.
After inverstigating more deeply it weems the protection circuit for the horizontal driver kicks in but i have no idea where to look.
What i found out is a missing +200V and +40V, wich seems to be driven from H-driver.
Very strange is, on IC1501 i get a voltage on pin 8, but it should be 0V. Since this pin is only pulled down by 33k and 4.7uF wich are both ok. Is this pin indicating an active protection circuit ?
I´m happy for every hint on this problem.
Thank you
My beloved PVM died :-(. Audio and controls are working, but no picture.
When I switch it on I can hear the typical high voltage noise, then its gone.
After inverstigating more deeply it weems the protection circuit for the horizontal driver kicks in but i have no idea where to look.
What i found out is a missing +200V and +40V, wich seems to be driven from H-driver.
Very strange is, on IC1501 i get a voltage on pin 8, but it should be 0V. Since this pin is only pulled down by 33k and 4.7uF wich are both ok. Is this pin indicating an active protection circuit ?
I´m happy for every hint on this problem.
Thank you