viewsonic power supply repair

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Sherman Browne
viewsonic power supply repair

I am fixing a viewsonic  n4251n, customer said it just died. I replaced a 7amp  800volts mosfet from the 5volts ps, but there is a shorted zener diode #ed ZD1 on the PC board,.Anyone know what is the value of this diode ,or have the circuit diagram?

 

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