K7400 Dim Picture Black and White not R811 but Open R310 Repair Log

jjhudgins

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Got a k7400 in for repair.
Cap Kit done but very dim picture with no colors
Checked R811
Stumped I just tried
Probing various resistors around it and found R310 completely open. It's supposed to read 1.2 ohms.

Replaced it and colors came back

Posting here for posterity.
 
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