Hi everyone. As a challenge Im trying to determine if this network video recorder is fixable. The largest problem is there is no schematic for this device.

What I know so far:
- This device is powered from an external 48VDC power supply (it measures a few hundred milivolt hunder 48VDC on multimeter)
- I've confirmed there is about 48VDC at the large capacitor directly after the input plug
- I've noticed there is a brown area near the DC-DC converter (TPS54560) which I would guess is burning from overheat?
- On input of DC-DC converter (Pin 2 Vcc to Pin 7 GND) we have 48VDC
I do not know how to measure the output of this TPS54560 convert. Any ideas?
- I've noticed one of the large capacitors near the chip is bulging. It's a 220uF 50V

Any suggestions of how to diagnose it further? My worry is on the surface mount capacitors and resistors I dont see any printed values so its hard to know what they should be

 

I can see the crook capacitor. That MAY be the only fault but it failing may have killed the power supply.
Check all the caps and replace if needed. Then, hopefully, it will live again. But you may have to replace the IC too, and maybe the rectifier diode.
Drying out electrolytic caps are the main fault in many piece of electronics.

 

I can see the crook capacitor. That MAY be the only fault but it failing may have killed the power supply.
Check all the caps and replace if needed. Then, hopefully, it will live again. But you may have to replace the IC too, and maybe the rectifier diode.
Drying out electrolytic caps are the main fault in many piece of electronics.

I will try diagnose the pins of the IC with a multimeter tonight. Regarding the capacitor I cannot actually unsolder it it seems to have a locking system.i might have to break it off

 

Regarding the capacitor I cannot actually unsolder it it seems to have a locking system.i might have to break it off

Often the PCB copper is pretty heavy in the power supply section sucking the soldering iron heat away. This makes it a bit difficult to remove unless you have a large bit in your iron to get the heat there. And sometimes the cap is glued down.