RIGOL DG1022  PROBLEM.  help me - Page 1
Forum section: electronics / testgear

author: hugos31
author_rank: Regular Contributor
timestamp: May 25, 2014, 10:20:21 pm
content: hello friends. accidentally; 24vdc introduced in CH1. currently; (channel 1). not emit signal. only sale-15v dc ..,,,,,,,,,,,,I keep track of the output circuit (channel 1) I found chip output signal (8-pin smd) with aluminum heatsink, id code cleared (scraped),,,, Please i need code? for reeplazar

author: c4757p
author_rank: Super Contributor
timestamp: May 25, 2014, 10:24:45 pm
content: We know what the front panel looks like - take a picture of the circuit around the chip!It's probably just a high output current, somewhat high speed, high slew rate op amp. Check how it's connected. You might be able to substitute without knowing the part number.

author: hugos31
author_rank: Regular Contributor
timestamp: May 25, 2014, 10:29:32 pm
content: id code cleared (scraped),,,, test: +15v and ; -15v

author: c4757p
author_rank: Super Contributor
timestamp: May 25, 2014, 10:35:25 pm
content: Yeah, I'm pretty sure that's just an op amp. You're looking for something in the neighborhood of anLM7171, but with a thermal pad on the bottom.Double-check that it's actually failed, though. Put it back in circuit, leave off the heat sink, set to a large output amplitude butdo not terminate the output(the goal is to have zero current draw - nothing through the attenuators, as there would be at small amplitude, and nothing out the BNC - in which case it shouldn't need the sink), at low frequency. Probe the inputs and see if it behaves like an op amp.

author: hugos31
author_rank: Regular Contributor
timestamp: May 25, 2014, 10:37:58 pm
content: . ok I test lm7171

author: c4757p
author_rank: Super Contributor
timestamp: May 25, 2014, 10:39:32 pm
content: No, please don't actually use an LM7171 - I said to find something with a thermal pad. That's just a bit too much heat for a 7171 (which is not available in a high power package).

author: hugos31
author_rank: Regular Contributor
timestamp: May 25, 2014, 11:21:57 pm
content: http://www.ti.com/lit/ds/symlink/opa541.pdf

author: kc9qvl
author_rank: Regular Contributor
timestamp: May 25, 2014, 11:41:52 pm
content: OPA541. Please review the datasheet you posted.

author: hugos31
author_rank: Regular Contributor
timestamp: May 25, 2014, 11:59:59 pm
content: OPA551https://www.futurlec.com/Linear/OPA552UA.shtml+- 30v is problema,,,,,,,,,,,,,can be opa454........http://www.ti.com/lit/ds/symlink/opa454.pdf

author: kc9qvl
author_rank: Regular Contributor
timestamp: May 26, 2014, 12:34:57 am
content: Compare the slew rate and gain bandwidth of the opa541 or 454 to the lm7172. The opa541 is not even the correct package.Have you tested the opamp yet?

author: hugos31
author_rank: Regular Contributor
timestamp: August 12, 2014, 10:48:47 am
content: ?

author: rf-loop
author_rank: Super Contributor
timestamp: August 12, 2014, 01:09:25 pm
content: Quote from: hugos31 on August 12, 2014, 10:48:47 amHow difficult is is ask from Rigol? They perhaps have today some kind of customer care and service help?

author: slowolitus
author_rank: Newbie
timestamp: May 29, 2018, 03:16:43 pm
content: THS3095 is the original IC

author: Gandalf_Sr
author_rank: Super Contributor
timestamp: May 31, 2018, 10:22:24 am
content: I wonder if hugos31 has reeplazared the OpAmp yet.

author: azemati
author_rank: Contributor
timestamp: February 15, 2020, 08:25:50 am
content: Hello everybodyThere is an inductor in output section of DG1022, it has been crashed, is anyone know how the value is?https://imgur.com/gallery/DzgQTzB

author: Dacke
author_rank: Regular Contributor
timestamp: February 15, 2020, 12:58:25 pm
content: Quote from: azemati on February 15, 2020, 08:25:50 amIt's a common mode choke and the exact replacement part number is ACM4532-901-2P. A while back, I blew the same choke in mine as well. Since it was difficult to find that exact one at the time, I used a close replacement from Digikey -https://www.digikey.com/product-detail/en/wurth-electronics-inc/744235601/732-4221-1-ND/3672769- It has been working fine ever since.

author: azemati
author_rank: Contributor
timestamp: February 16, 2020, 06:43:10 pm
content: My friend,appreciate 🙏