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K7000 no red

triforce7770

Student
Joined
Jun 9, 2021
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Got no red on this k7000, had a lifted transistor so fixed the trace. Also change out q1 on the chassis that controls the red input, no change, change neck boards still no change. Also reflowed the video header pins. Used my bk 467 to check gun life. Red gun is strong in the green bar.
Changed out the red cutoff and drive pots still no change.
Check traces on neckboard on red circuit found no broken traces, checked resistors near the rgb molex next to ic1 and found nothing. Color changes red intensity on the side when I adjust blk level and contrast on remote board.

Also changed remote boards still nothing. Here are some pics and a video of the problem.
View: https://youtu.be/6YlOYvlLJF0
 

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Figured it out! It was missing a 223k cap that needs to be on pin 1 and 22 of ic1!!!
 
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