I'm looking for the wiring diagram for led monitor model DHI-LM19-L200

[gabri2211]

hello everyone, I'm looking for the wiring diagram of this led monitor.
the model is DHI-LM19-L200, but I think that any other diagram of a DAHUA monitor could be equivalent.
I really hope that among you someone can help me to repair this monitor, the screen is black, it doesn't seem like a backlight problem.
I see the presence of 12 volts, 5 volts, but without a diagram the repair is very difficult.
thanks to those who will answer

[gabri2211]

NONE

[gabri2211]

Hi to all 😎
I'm looking for any useful information to repair this interface (I have attached the image).
On this board I read E3215-1215A_4D.
This is the small plate inside the HD enclosure that allows to connect a 12 volt power supply, interface the disk with a USB 3.0 socket and is connected to the HD with the SATA connector.

If any of you have found a burnt or short-circuited component in a circuit like mine, if you have useful diagrams for the repair, or even better a description for the tests at the test points, I would be very grateful.
in particular...

[gabri2211]

Re: APC Back-ups RS 1500 Dead



Zorix you are great!!!
thanks to your precious advice I solved the fault of my APC RS1000 which on the motherboard shows the diagram 640-0253E.
Thanks to everyone like you who gives good guidance, and makes this forum GREAT. ...

[gabri2211]

Re: I ask some good person for help on "@" character and how to understand the indica



I think what you wrote too.
thanks for your reply ...

[gabri2211]

Re: I ask some good person for help on "@" character and how to understand the indica

Thanks friends, just for answering me - you already helped me
I would like to try to insert an attachment to explain better...

OK done

you will see on page 41 in the captions LED3 and LED7 a resistor with the character @, the other without @.

and on page 45 you will see PD3 - PR8 - PC6 with character @.


For the capacitors, I'm a qualified electronic technician, and I know the differences and the values of...

[gabri2211]

Re: Terramaster F2-220 NAS

Sorry...I havent a programmer

[gabri2211]

Greetings to all of you, as you will understand from the questions, I'm not familiar with electronic diagrams .... from theory to practice there is always an abyss :o)

1 - I often find the "@" character in the electronic diagrams of laptops near the component and I'd like to understand if it indicates a component that may not be present in the real hardware execution or if there is a different explanation for the use of this @.

2 - I write these examples:
2S@ PC217 0.22U_0603_16V7K 16 volts (max) what does it mean 7K ?
...

[gabri2211]

Hello everybody
I'm looking for the electronic schematic of this NAS.
In the motherboard I see the codes
E230435
JH M3 94V-0
tm1210
and also tm-j1800
other diagrams of the same brand could also fit, for example F2-221 or others, as in the attached photo.

Maybe it would be useful to know the name of the manufacturer.

When I turn on the NAS, I see the LEDs on the front panel light up, but there is no power to the hd.
the first two mosfets close to the power connector start conducting correctly, the next 4 mosfets...

[gabri2211]

Re: New Members - please post your introductions here

Hi all of you, my name is Gabriele
I have a wife and son, I have lived in Italy since I was born, I am an expert diplomat in industrial electronics and I have worked for 42 years at a telephone company here in Italy.

I started working when there were still only telephones with a disk to dial the number... cell phones didn't even exist. Then over time things have changed a lot.... :o)
A team of engineers in the company where I worked invented the first text messages SMS and subsequently gave...