Nanao ms9-29 monitor green dot

ekeeb

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Nanao ms9-29 monitor green dot, lives with issues

New hot,cap kit now have a green dot dead center of screen.Any ideas?
 

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You might want to check the yoke. Last time I had a single dot the yoke wasn't plugged in right. What game you putting this in Ed?
 
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Shut it off, unplug the yoke and measure the horizontal and vertical at the yoke connector to make sure the yoke is okay.

Does this version have a remote board?
 
No remote board,but bad pin connector fix it,now i have solid green line threw the middle,dam it.
 
Some of the nanao's have a resistor that burns up near the vert transistors....
 
the two resistor ohms out ok and yes there is a remote board played with it no different results on screen.
 
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She lives

Ok replace vertical ic and she lives for now but there is limited vertical adjustment,pic below shows adjustment to the max.bad pot?
 

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Did you use the proper vertical IC? Might need to cap this thing, especially the vert section...
 
replaced ic with correct ic picture perfect now no blue

missing blue,I get nothing when trying to adjust.
 
Do a voltage check at the video plug to make sure you have voltage for the blue, then follow it to the neckboard to see if you have it at the socket (Bk)....
 
Check color drive transisters Q302 Q312 Q322, Resistors R306 R316 R326 Also Zener diodes ZD301 Z311 ZD321, Also check for bad solder in all these areas
 
problem found and fixed

The connector wire from the board to the remote board has two broken wires inside the insulation,found this by doing a continuity check.The blue is back.Thanks for all your help modessitt.Ed
 
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