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Electronics => Repair => Topic started by: NiaDebesis on March 19, 2023, 09:25:36 am

Title: Unknown componenti, help identifying
Post by: NiaDebesis on March 19, 2023, 09:25:36 am
Hi,

I am repairing an old switching PSU and I found an unknown component, can you help me identifing it?
Any help will be appreciated.

Title: Re: Unknown componenti, help identifying
Post by: NiaDebesis on March 19, 2023, 09:57:29 am
other photos
Title: Re: Unknown componenti, help identifying
Post by: wraper on March 19, 2023, 10:02:46 am
It's some custom module.
Title: Re: Unknown componenti, help identifying
Post by: NiaDebesis on March 19, 2023, 10:23:53 am
So if its broken I am screwd
Title: Re: Unknown componenti, help identifying
Post by: wraper on March 19, 2023, 10:27:28 am
Well, likely it can be taken apart and repaired but it will be very troublesome as it's most likely potted.
Title: Re: Unknown componenti, help identifying
Post by: Wallace Gasiewicz on March 19, 2023, 08:04:54 pm
Possibly a resistor network??
Title: Re: Unknown componenti, help identifying
Post by: wraper on March 19, 2023, 08:05:30 pm
Quote from: Wallace Gasiewicz on March 19, 2023, 08:04:54 pm
Possibly a resistor network??
no chance.
Title: Re: Unknown componenti, help identifying
Post by: RoGeorge on March 19, 2023, 09:32:16 pm
Looks like a hybrid IC, how old is the device?

The good news is that it looks like a casual switching power supply, judging by all the surrounding transformers and the optocouplers.  Maybe the whole thing can be replaced with a generic SMPS with the same output voltage.  Try to look at the silkscreen, or try to get a service manual in order to find the outputted voltages and their max currents.
Title: Re: Unknown componenti, help identifying
Post by: R-1125F on March 19, 2023, 10:09:30 pm
What type of equipment is it?  Manufacturer and model number?
Title: Re: Unknown componenti, help identifying
Post by: gamalot on March 19, 2023, 10:26:42 pm
Maybe a single in-line relay, or resistor networks.

---

Well, I looked again and I noticed that the OP said it's a SMPS, but couldn't find any IC on the board, not even a BJT or MOSFET, so it's most likely a thick film IC module.
Title: Re: Unknown componenti, help identifying
Post by: wraper on March 19, 2023, 11:10:56 pm
IMHO it's just a potted circuit on regular FR-4. Maybe a hybrid on ceramic substrate, but I don't think so. Those usually have a hard coating and no enclosure.

(https://upload.wikimedia.org/wikipedia/commons/b/b0/Hybridcircuit.jpg)
Title: Re: Unknown componenti, help identifying
Post by: abdulbadii on March 20, 2023, 12:36:12 am
Imho really demands reverse engineer to have its vicinity schematic
is in primary or secondary part ?