I am appreciate your help oldway! Thank you very much!
Power supply is ok.. all power rails within voltage limits.
When I check voltage levels referring service manual, I found 51v zener regulated line voltage drift in Z-axis board.. I found one resistor valve drift after troubleshooting.
It is 2.4k carbon composite resistor. Colour code is red,yellow,red,gold,and yellow. What is the last colour band mean?
Sent from my SM-N910C using Tapatalk