This symptom is usually remedied by turning the G2 control slightly clockwise. My service manual(KV-32S15) says location is RV702 on the CRT PCB. If you are a tech. you know the better answer is to rejuvenate the CRT. I have done this many times with very good results. If your set has been on for 6 hours or more every day since new, then just turning up the G2 will not be good enough.

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