Need help for a repair for the Rigol DG1022A

[thephantom1492]

Hello everyone
I need help to figure out a proper replacement for the common mode choke for the channel 1 of my signal generator.
Mine is just... a dead short so no mesurement is possible.

<=== This is the choke, as seen there: ===>

edit: need mostly the inductance value, or a likelly range...

edit 2: specify siggen

[thedoc298]

It should measure as dead short or very low.  What is the problem with scope...?

[thephantom1492]

dead short on all 4 pins on that common mode choke. Channel 1 output is null.

Removed the choke and replaced by 2 wires and the siggen work, but obiviously the removal of a component is not ideal.

And, that choke is short on all pins.

edit: the DG1022A is a siggen, not a scope

[thedoc298]

So the choke was shorted, and you replaced the shorted choke with wires (another short) and it works.

So don't you think your choke is open and not shorted..?

[Dacke]

This is the one I used in my DG1022 as I had the same thing happen to mine:

https://www.digikey.com/product-detail/en/wurth-electronics-inc/744235601/732-4221-1-ND/3672769

And yeah,  the windings in the choke got blown open due to my own stupidity.   The sig gen works fine now.

[thephantom1492]

Here mine had started to be weird at time, showing overload at time that I wondered why... and then I fed 35V from a subwoofer to the ground (fricking amp seems to be positivelly grounded, or something, the red was the ground !

I hope it will fix the other issue I had at the same time.

edit: thanks!

[thephantom1492]

Good news! I got a reply from rigol itself!

That choke is ACM4532-901-2P, an alternative is ACM4532-801-2P.

Both currently unavailable, we'll see if it come stock soon.

[Housedad]

Here ya go:

https://www.ebay.com/itm/5PCS-X-ACM4532-801-2P-T001-4532L-TDK/332594598263?hash=item4d702ed177:g:H1IAAOSwqblasvQ6

[thephantom1492]

A bit old (been quite busy) but for future reference:

ACM4532-901-2P

ACM: series

4532: size, 4.5x3.2mm

901: impedance at 100MHz: 900Ω

2P: number of lines


I can't find the ACM4532-901-2P exact specs, but the 801 is:
800Ω@100MHz, DC resistance: 100mΩ, rated current: 1A, rated voltage: 50V