Re: Dell DA2 12V 18A PSU repair P/N M8811

I've worked out what the NGV1 is from its function although I don't know its original manufacturer number. It is a P-Channel Enhancement Mode MOSFET in a SOT-23-3 package. The gate and drain are connected by a 100kΩ resistor and the source is connected to the supply voltage of 15Vdc unloaded. The drain is connected to the the output pin supplying all the components. When the Remote Wire, connected to the gate, via a 100Ω resistor is shorted to ground, then +15V supply switches to +12Vdc when the drain outputs +12V to the control...

Re: Dell DA2 12V 18A PSU repair P/N M8811

Correction: - Zener Voltage : The Secondary Side Components are a measured 9V Zener in a cylindrical orange SMD package marked 882 (I think). The SOT23 package is marked NGV1 which I think is a BD49L55 but maybe it is just V1 then its is a ELM9751CBB which measure 5V1 voltage detect as well. Or it could be a Zener Diode DZ23C2V7 but since there is already a 9V Zener there, it is unlikely.

Re: Dell DA2 12V 18A PSU repair P/N M8811

Well I,ve got a Dell 12V 18A DA2 like yourself. Maybe you can reverse engineer it. I looked and measured my own and these are the clues.

The Primary Side has 4 pins. The grounded innermost pin as 0V reference and the pin closest to the PCB edge is 310V, I didn't measure the two inner pins.

The Secondary Side Components are a measured 7V93 Zener in a cylindrical orange SMD package marked 882 (I think). The SOT23 package is marked NGV1 which I think is a BD49L55 but maybe it is just V1 then its is a ELM9751CBB which...

Re: New Members - please post your introductions here

Hi Everyone. Grateful for this forum. Came across it trying to eliminate an AL E9 alarm on a Mitsubishi Servo Drive. The super moderator Per Hansson's info on the Mitsubishi Melservo MR-J2S-100A alarm: AL.E9 post did the trick. Replaced HCPL-7800 and the drive works smoothly again.

I hope I can contribute in a meaningful way as well.
Anton