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Verticle Collapse. Check the vert section and the transistors for the vert outputs. Should be your problem.
Verticle Collapse. Check the vert section and the transistors for the vert outputs. Should be your problem.
I replaced both the Vert transistors and still nothing.
What should I look at next? Any ideas?
I really appreciate it.
ERIC
Had a MatsuSHITa in my Pole Position when I got it, had vert. collapse. Was a cold solder joint, but I can't remember where off the top of my head. ... Worked for a little bit, then something else fried and I just set the thing aside and haven't looked at it since.
Yeah, it started smoking after a little while...if the tube wasn't so clear and flawless I'd just trash it.
For those... I subscribe to the idea that the tube has no burn-in because the monitor broke so fast it didn't get a chance to burn anything in.
If you want to keep the tube... might be easier to get an aftermarket chassis and slap it on. Save yourself the headache of fixing it and future house fire from running it.
Yeah, the tubes used in these monitors are odd - you won't find an aftermarket chassis that will work.
Check the solder joints around the deflection yoke connector, and check the vertical transistors.
-Ian
Oh dear. Mine didn't do that (although I powered it down before moving the switch). So when you say the picture came back did it breifly actually fix the problem? Have you downloaded the schematics yet? They show the vertical section of the circuitry in Figure 9 on page 15 of the schematics (page 21 of the pdf). It looks like the switch (SW301) is a service switch and it probably connects via a couple of resistors to pin 6 of the IC, marked as 'V osc'.