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Video interphone mafunction

vrijebaxx

Apr 4, 2023
5
Joined
Apr 4, 2023
Messages
5
Hi all,

I have a small problem with my interphone indoor video unit. Recently I was connecting unit in new apartament and (later I figured out) made a wrong connection. Now unit is lid but with no response.

To find new unit is almost impossible so I am trying to repair this unit, but there are no visual damages. I would be very grateful for some guidance what to check and where...IMG_20230404_123154.jpgIMG_20230404_123219.jpgIMG_20230404_123203.jpg
 

kellys_eye

Jun 25, 2010
6,514
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Jun 25, 2010
Messages
6,514
Recently I was connecting unit in new apartament and (later I figured out) made a wrong connection.
What 'wrong connection'?

The fault is undoubtedly related to your 'wrong connection' but unless we know that connection is/was we're clueless.
 

vrijebaxx

Apr 4, 2023
5
Joined
Apr 4, 2023
Messages
5
The wrong connection was that I sent 12VDC in Forecourt connector insted in DC12V connector. In the picture is red where is originally sent power and green where I supposed to send.IMG_20230404_151019.jpg
 

kellys_eye

Jun 25, 2010
6,514
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How did you get a 4-pin plug into a 2-pin socket? If you put the 2-pin into a 4-pin then putting GND on the CVBSIN pin wouldn't do any harm. Still not quite sure how you did what you did....

Is the power supply to the display still giving out 12VDC?
 

vrijebaxx

Apr 4, 2023
5
Joined
Apr 4, 2023
Messages
5
It was done during connections on the other end (during soldering UTP cable wires and power supply).
The power supply is giving 12VDC out...
 

kellys_eye

Jun 25, 2010
6,514
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Jun 25, 2010
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Post close-up images of BOTH sides of the circuit board.
 
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