another 20ez problem thread!

tomtime

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I just picked up a dual monitor playchoice. After playing it for about two hours, I smell flyback smoke and the 300ma fuse is blown. So today I install a new fly, hot and cap kit then hook it up. For about five seconds I get a blue screen then nothing. It plays blind, I get neck glow and the fuses are in tact. What the hell is the problem?

Thanks!
 
I checked the B+ and couldnt adjust below 133vdc. Just replaced the filter cap and am about to replace ic601 with a spare from Mr. Roberts. Im hoping the ic isnt from the bad batch I heard about! Is there anything I missed here or anything left to check?
 
possible bad regulation or missing horizontal deflection drive to your hot..
if changing the 7pin sip regulator driver ic doesn't change try the 3 leg regulator transistor..
d1093 if I recall correctly..

if you hit a dead end, you could always ship it off to me.. $105 shipped for the repair if you already have new caps and flyback.. otherwise $110 if just new flyback.
 
Thanks Chad
Im putting in a new IC601, Q901 and B+ pot tomorrow and will keep you updated.
On a shitty side note, I had a XM1801 chassis on the bench and I accidentley plugged in thinking it was my soldering iron. By far the stupidest thing I have done since I came into this hobby. What kind of damage did I cause and is it reversable?

Thanks
 
I just soldered in a new Q901, B+ cap and pot and still cant get the B+ to move under 133vdc.
I have no clue what to look for now..
Any ideas?
 
I turned vr301 all theway down then centered the other brightness pots. After that
I was able to adjust the B+
 
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