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Author Topic: RIGOL DG1022 PROBLEM. help me  (Read 10329 times)

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Offline hugos31Topic starter

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RIGOL DG1022 PROBLEM. help me
« on: May 25, 2014, 10:20:21 pm »
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
« Last Edit: May 25, 2014, 10:34:46 pm by hugos31 »
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Offline hugos31Topic starter

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Re: RIGOL DG1022 PROBLEM.
« Reply #1 on: May 25, 2014, 10:21:22 pm »
 
« Last Edit: May 25, 2014, 10:27:31 pm by hugos31 »
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Offline c4757p

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Re: RIGOL DG1022 PROBLEM.
« Reply #2 on: May 25, 2014, 10:24:45 pm »
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.
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Offline hugos31Topic starter

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Re: RIGOL DG1022 PROBLEM.
« Reply #3 on: May 25, 2014, 10:29:32 pm »
     id code cleared (scraped),,,,   test:  +15v  and ; -15v
« Last Edit: May 25, 2014, 10:39:40 pm by hugos31 »
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Offline c4757p

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Re: RIGOL DG1022 PROBLEM.
« Reply #4 on: May 25, 2014, 10:35:25 pm »
Yeah, I'm pretty sure that's just an op amp. You're looking for something in the neighborhood of an LM7171, 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 but do 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.
« Last Edit: May 25, 2014, 10:37:16 pm by c4757p »
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Offline hugos31Topic starter

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Re: RIGOL DG1022 PROBLEM. help me
« Reply #5 on: May 25, 2014, 10:37:58 pm »
  :-+ .  ok  I test  lm7171
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Offline c4757p

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Re: RIGOL DG1022 PROBLEM. help me
« Reply #6 on: May 25, 2014, 10:39:32 pm »
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).
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Offline hugos31Topic starter

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Re: RIGOL DG1022 PROBLEM. help me
« Reply #7 on: May 25, 2014, 11:21:57 pm »
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Offline kc9qvl

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Re: RIGOL DG1022 PROBLEM. help me
« Reply #8 on: May 25, 2014, 11:41:52 pm »
OPA541  ???.  Please review the datasheet you posted.
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Offline hugos31Topic starter

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Re: RIGOL DG1022 PROBLEM. help me
« Reply #9 on: May 25, 2014, 11:59:59 pm »
OPA551  https://www.futurlec.com/Linear/OPA552UA.shtml   :-//   +- 30v  is problema,,,,,,,,,,,,,can be   opa454........http://www.ti.com/lit/ds/symlink/opa454.pdf
« Last Edit: May 26, 2014, 12:25:58 am by hugos31 »
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Offline kc9qvl

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Re: RIGOL DG1022 PROBLEM. help me
« Reply #10 on: May 26, 2014, 12:34:57 am »
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?
« Last Edit: May 26, 2014, 12:38:09 am by kc9qvl »
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Offline hugos31Topic starter

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Re: RIGOL DG1022 PROBLEM. help me
« Reply #11 on: August 12, 2014, 10:48:47 am »
?  :-//
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Offline rf-loop

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Re: RIGOL DG1022 PROBLEM. help me
« Reply #12 on: August 12, 2014, 01:09:25 pm »
Quote from: hugos31 on August 12, 2014, 10:48:47 am
?  :-//

How difficult is is ask from Rigol? They perhaps have today some kind of customer care and service help?

« Last Edit: August 12, 2014, 01:15:56 pm by rf-loop »
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Offline slowolitus

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Re: RIGOL DG1022 PROBLEM. help me
« Reply #13 on: May 29, 2018, 03:16:43 pm »
THS3095 is the original IC
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Offline Gandalf_Sr

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Re: RIGOL DG1022 PROBLEM. help me
« Reply #14 on: May 31, 2018, 10:22:24 am »
I wonder if hugos31 has reeplazared the OpAmp yet.
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Offline azemati

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Re: RIGOL DG1022 PROBLEM. help me
« Reply #15 on: February 15, 2020, 08:25:50 am »
Hello everybody
There is an inductor in output section of DG1022, it has been crashed, is anyone know how the value is?
https://imgur.com/gallery/DzgQTzB
« Last Edit: February 15, 2020, 08:57:39 am by azemati »
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Offline Dacke

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Re: RIGOL DG1022 PROBLEM. help me
« Reply #16 on: February 15, 2020, 12:58:25 pm »
Quote from: azemati on February 15, 2020, 08:25:50 am
Hello everybody
There is an inductor in output section of DG1022, it has been crashed, is anyone know how the value is?
https://imgur.com/gallery/DzgQTzB

It'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.
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Offline azemati

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Re: RIGOL DG1022 PROBLEM. help me
« Reply #17 on: February 16, 2020, 06:43:10 pm »
My friend,
appreciate 🙏
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