Video interphone mafunction

[vrijebaxx]

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...

 

[kellys_eye]

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]

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.

 

[kellys_eye]

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]

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]

Post close-up images of BOTH sides of the circuit board.

 

[vrijebaxx]

Looks like other side is damaged...do you think this is reparable?

 

[kellys_eye]

Need a closer view.....

 

[vrijebaxx]

Hi,

sorry for late reply but busy days...

Here is photo...