Hi;
I have been working on this deflection PCB for quite some time and I am at the end of my rope.
When I fire up the monitor, spot killer illuminates and R620 and R720 get burning hot. I checked and are getting full voltage to the yoke, ~24v, steady on pins 1 and 4 on P702 - not good.
When I swap a known good deflection PCB, I got game, place this back in, spot kill.
I disconnected the yoke to troubleshoot, and checked for input, got it at P703 and traced it up to the pots and then I am having a problem continuing up the ladder.
Any hints on what might be causing the lack of deflection??
I checked Q704 and Q705 and have ~23v on all legs, (B-E-C).
I am going to have to pull the PCB to get access to all the transistors in the circuit.
Any help would be appreciated......
Thanks
Jeff
I have been working on this deflection PCB for quite some time and I am at the end of my rope.
When I fire up the monitor, spot killer illuminates and R620 and R720 get burning hot. I checked and are getting full voltage to the yoke, ~24v, steady on pins 1 and 4 on P702 - not good.
When I swap a known good deflection PCB, I got game, place this back in, spot kill.
I disconnected the yoke to troubleshoot, and checked for input, got it at P703 and traced it up to the pots and then I am having a problem continuing up the ladder.
Any hints on what might be causing the lack of deflection??
I checked Q704 and Q705 and have ~23v on all legs, (B-E-C).
I am going to have to pull the PCB to get access to all the transistors in the circuit.
Any help would be appreciated......
Thanks
Jeff

