OK let's do some work. The photo of your Fluke - I assume that waveform in on the anode of the !N5106 diode? It is 100Hz so is the full wave rectified output from the bridge rectifier. How are you powering the SMPS in this photo? Directly from mains supply or from the output of an AC transformer?
The image of the fluke are the tips in parallel with the diode IN5106
Here are a few things i would like you to try. When you connect the SMPS to the 220V mains supply, what voltage do you read across the 100uF 450V electrolytic capacitor?
The voltage is: 315V
If you then switch off the mains supply what happens to the voltage on the 450V capacitor? Does it discharge rapidly or slowly?
I would say slowly, from 315V to 10V it takes 45s
Use your oscilloscope and have a look at pins 11 and 12 of ML4800. What do you see there?
Does the SMPS have 2 power FETs like the example circuit diagram or just one? With the oscilloscope what do you see on the Gate pin of the Power FET(s)?
The oscilloscope does not mark anything either on leg 11 or 12 and on the two doors of the mofet transistors, either, the power supply is consuming 10mA (I send you an image
Does the SMPS have 2 power FETs like the example circuit diagram or just one? With the oscilloscope what do you see on the Gate pin of the Power FET(s)?
Nothing, nor when I feed with 15V the ML4800, nor when I put the mains voltage (230V)
In this assembly the ML4800 has two mofet, although at the output has three voltages (second photograph)
Oh.... and could you tell me is your ZXY6005 powered from a step down transformer like this video?
or do you have it connected in some other way?
My ZXY6005S I have it connected to a switched power supply of 24V and 4.5A in one of the pictures can be seen.
The conclusion I get is that the ML4800 does not work and I will have to replace it and start over to check everything. What do you think?
Enjoy everything you can from the beach, here in Valladolid is very cold for water.
La imagen del fluke son las puntas en paralelo con el diodo IN5106
El voltaje es de: 315V
Yo diría que lentamente, de 315V a 10V tarda 45s
El osciloscopio no marca nada ni en la pata 11 ni 12 y en las dos puertas de los transistores mofet, tampoco, la fuente de alimentación esta consumiendo 10mA (te mando una imagen)
Nada, ni cuando alimento con 15V el ML4800, ni cuando meto la tensión de red(230V)
En este montaje el ML4800 tiene dos mofet, aunque a la salida tiene tres tensiones (segunda fotografia)
Mi ZXY6005S la tengo conectada a una fuente de alimentación conmutada de 24V y 4,5A en una de las fotografías se puede ver.
A la conclusión que llego es que el ML4800 no funciona y tendré que sustituirlo y empezar otra vez a comprobar todo. ¿Qué opinas tu?
Disfruta todo lo que puedas de la playa, aquí en Valladolid hace mucho frio para el agua.