i replaced the cap off of the 15V standby, and i still get the same ****. im
at a standstill im assuming somethign is loading the standby down, shorted
somewhere.


as the set only fired up once wiht HV. and never did it again.

the HOT tests fine.



"Mike" wrote in message
...
i think something somewhere is funky. I scoped out the 15v standby, it
looks like sawtooth, with a ringing on the up-ramps.


when i press power, you can here the supply "tick" and the sawtooth gets
considerably larger, and then drops back down the way it does. the cycle
repeats each time i hit power.

i scoped the 26v source from the power supply, it also has this "sawtooth"
ripple, but its considerably smaller. although still preseant.


any ideas?


"Mike" wrote in message
...
Got this set, it would turn on and fire HV for a second, then shut back
down. it wont do it anymore, only did it one time.


I monitored C4118 while pressing the button, it would start off at 13.1
volts, and drop down to about 5 volts. when power button was pressed.


I then replaced CR4118, and replaced 2 caps in the IC chip of the power
supply. the main B+ at standby levels is about 143vdc. the 15v standby is
about 13.3 still.


but this time, when you press the power button, OR perform the manual
power-on, bypassing the micro unit, the voltage doesnt drop anymore, but
the set still is dead. HOT is fine, chopper is running. I dont know what
to look for next.

however if i hold the board in manual power on, every once in awhile the
degauss relay would start clicking on and off a little bit, very faintly,
like a weak supply somewhere.

any ideas?