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Author Topic: Nanao ms2930 any techs want to collaborate  (Read 85 times)

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nvddisplays

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Nanao ms2930 any techs want to collaborate
« on: January 13, 2026, 07:26:21 pm »
Looking for actual technicians who service this board? This one s Rick Nieman of Nieman Video displays. I am very deep into a number of these boards. Have schematics recreated by Franck. Numerous boards that have bad q955 (necj448 p channel fets). Ordered replacement Fets but as they are obsolete non of those received are good? Going to try J459’d. So here is the scoop all have bad Q955’s all have good Q901’s all have good Q501’s(hots). All have good caps on the secondary B+ lines. At power up the 180 volt climbs rapidly to about 220 volts and shuts down. Please note this board has at least 3 shut down circuits. Any suggestions or has anyone had failures with Q955.
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