hai sir, thanks for your replay

anyway to get its service manual please

Thank you for your support,

I am  using BF pro with cubase 10.5 in windows.

BF pro powered by USB, no extra power supply.

When we switch ON the phantom power, 48v led glowing but voltage not getting on mic and some times OK. Voltage downing not suddenly, it is slowly and some time it return to normal 48v. I have no sure about the phantom power of my RME, thats why I am using additional phantom power in input line between mic and RME XLR inputs.
My mics are rode nt2a and behringer C1.
I checked all the cables, all things are working fine( as I am an electronic technician also)

All other things are working fine.

Please help to solve this

I am already tried it with all usb ports and also with an external power supply.
anybody can help me please

You have a correct external power supply with the locking connector and you are able to measure the phantom power correctly (you say you are technician)
The phantom power is not stable, then it looks like defective unit and is a case for the support
email : support@rme-audio.com

Dear friend,

oli77sch and waedi

Thank u for your response,
already done all kind of testing and also update software.

https://drive.google.com/file/d/18M-d7g … share_link

Thank u dear friend,

I just like show the problem of my RME. when we switch on the 48V, the babyface indicator ON and the mic also ON. but after 2,3 seconds 48v down. But babyface 48v indicator is ON. mic also not working

Thanks for your responce

Thanks Dear,

can u please look on that behringer mic, there is one led for indication, and also my total mix have no input signal.
I checked with multi meter in babyface in put also

if any body have schematic? at least share only that phantom power supply area please

Thank You Dear MC for your response

I did all kind of checking with in my knowledge, can not find any problems in my small set up.
Can you  please check my previous messages?.
Also I have not sure about the local service centers, that's why I try to seek the forum advice

Thank You

I am from Kochi, India

Thanks for your response, but I have not sure about that. They may be replace the main board.
now it is working with external phantom power. but I like to use its original condition that's why.

Thank You Dear for your response

I did all kind of checking with in my knowledge, can not find any problems in my small set up.
Can you  please check my previous messages?.
Also I have not sure about the local service centers, that's why I try to seek the forum advice

Thank You

First time(when I purchased) mic connect directly to BF in put.
but after that phantom power failure, using a separate phantom power between in put and mic

I can understand schematic is confidential, but if I got at least only that phantom power supply area of the schematic, try to self service

Thanks All of you for your responses

now it is working perfectly with external phantom power between mic and BF in put.
I dont like to send it to a service center for repairing. hope if I get a service manual I can do the repair. Now  I under stand, that is not possible

Not exactly a PSU (this one didn’t solve the issue), but an external phantom power unit between mic and Babyface mic input.

Oops read it wrong

Yes Dear you are correct now I am using an external phantom power

You checked and phantom power is ok?