Neotec 2701 - R431 glowing red!

woodsy169

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I have a Neotec 2701 in a Golden Tee Complete. I replaced the flyback since I was having the drifting/focus issue and I got a custom order of caps from Bob Roberts (his kit is for a 27E), installed them in the monitor, fired it up and it had a beautiful pic! It was played for about two hours during a party I had on Friday night...I went about my business and when I went back to look at the Golden Tee, the screen was blank, but the game was playing blind...I checked the fuse on the monitor board, looks good and looking at the neck tube, it is glowing. I do notice something glowing on the board itself though...took a closer look and see it is the R431 resistor. Any ideas why this thing would be glowing bright orange/red? Any help/input with this would be great appreciated!!

Here is a pic of the resistor/board...notice the black char??? Damnit!!

r431.jpg
 
I have a Neotec 2701 in a Golden Tee Complete. I replaced the flyback since I was having the drifting/focus issue and I got a custom order of caps from Bob Roberts (his kit is for a 27E), installed them in the monitor, fired it up and it had a beautiful pic! It was played for about two hours during a party I had on Friday night...I went about my business and when I went back to look at the Golden Tee, the screen was blank, but the game was playing blind...I checked the fuse on the monitor board, looks good and looking at the neck tube, it is glowing. I do notice something glowing on the board itself though...took a closer look and see it is the R431 resistor. Any ideas why this thing would be glowing bright orange/red? Any help/input with this would be great appreciated!!

*snip*


Odd....

Look at caps C423 and C424 (with 424 being the most suspect) to make sure they are oriented correctly and there are no solder bridges or shorts. If C424 wasn't included in your kit (10uf, 50v or higher), replace it. Pull the resistor out and measure it out of circuit, should be 10k, as cooked as it is, it's value may have drifted.

D
 
There is a c423, but no c424...c423 is a big maroon/brown cap and c424 is empty. I went to the 'shack and bought new resistors for R431 and R432. I found this info earlier:

Monitor problems encountered and solutions.
Symptom: No power up, fuse not blown. Found resistors R431 (10k, 1/4 watt) and R432 (22k, 1/2 watt) were both burnt due to electrolytic capacitor C424 being shorted. Cap c424 was originally 10uf @ 50 volts, but I suggest upgrading the voltage rating to either 100 or 160 volts. Generally if these parts are bad then the flyback is also bad too so replace the flyback also. You'll probably find pinholes in the top of the flyback as well as hairline cracks in the case around the focus adjustment pot. These flybacks seem to fail alot. Other persons have reported these components failing also and they should be checked out: C417, C419, C420, C421, C423.
 
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