scheme eletric to repair circuit rigol DG 1022  - Page 1
Forum section: electronics / repair

author: cesar1
author_rank: Contributor
timestamp: October 20, 2018, 06:21:26 am
content: Please help meMy wave generator burned.it is the DG 1022A model.I'm sending him a photochannel 1 has stopped working.the piece that burned I'm sending in attachment. this piece is at the exit of channel 1.please help mewhere can I buy another equal piece to replace the burned piece?you would have the electric design of this model DG 1022 Awhat is part number of piecethank you

author: ataradov
author_rank: Super Contributor
timestamp: October 20, 2018, 06:28:06 am
content: What is on the other side of the part? Are there ant markings? How do you know it is bad?It looks like it might be a SAW filter.

author: cesar1
author_rank: Contributor
timestamp: October 20, 2018, 06:46:06 am
content: I tested the piece.This piece is in short.it stays on channel 1.there is nothing written on it.Have you seen this piece? I do not know what the play is.Do you have her part number?Do you have the electric circuit of DG 1022A?

author: ataradov
author_rank: Super Contributor
timestamp: October 20, 2018, 06:48:50 am
content: Take a picture from the other side. It may be an inductor, in which case it will look like a short.Nobody has the schematic for it.

author: cesar1
author_rank: Contributor
timestamp: October 20, 2018, 06:50:52 am
content: this component is at the output of channel 1

author: cesar1
author_rank: Contributor
timestamp: October 20, 2018, 06:58:27 am
content: it is a protective componentHe did not burn anything else. only this component burnedit shorted due to VDC voltageI'll take more photos tomorrowbut do you know this circuit of the dg 1022a model? Have you ever maintained it?what are the possibilities of which component it is?there is nothing written in the componentI can not identify which component isYou said it could be the saw filter.what are the other possibilities?

author: coromonadalix
author_rank: Super Contributor
timestamp: October 20, 2018, 01:22:11 pm
content: Be patient, it is your only choice, Someone may help you, the schematics arent available .... if not ask Rigol about your part, and tell them the location of this partEx: U100, L101, t01, etc... you have markings on the pcb, maybe tehy could send you sections schematics, you'll never know if you dont ask them.Show us some pictures where this part is ...

author: jpanhalt
author_rank: Super Contributor
timestamp: October 20, 2018, 01:27:21 pm
content: Blown output seems to be a common problem with that generator. Lots of hits with Google. Here are 3 that seemed interesting. The last link suggests the 4-pin device is an attenuator.https://www.eevblog.com/forum/testgear/rigol-dg1022-problem/msg451006/#msg451006Post #12 -- possible reverse engineered output circuit:https://www.eevblog.com/forum/repair/rigol-dg1021-repair/Seems to conclude it is a choke:http://antiqueradios.com/forums/viewtopic.php?f=8&t=263139

author: cesar1
author_rank: Contributor
timestamp: October 20, 2018, 02:48:05 pm
content: Thank you guys, you guys are awesome.I'm sending new photos, the piece that burned is that of the photonow my questionIs this part the ths3095?What is this piece? Can I buy this piece ths3095?

author: HB9EVI
author_rank: Frequent Contributor
timestamp: October 20, 2018, 03:00:53 pm
content: No, don't buy anything. Your burned part is not the driver opamp, but something else, most likely a passive componentCheck the functional channel on the other side of the pcb; maybe you discover something on the same piece of circuitry over there, what could give a clue

author: cesar1
author_rank: Contributor
timestamp: October 20, 2018, 04:02:27 pm
content: hb,channel 2 is running normal, it is different from channel 1this thread :https://www.eevblog.com/forum/repair/rigol-dg1021-repair/is talking about ths3095 I'm on doubt nowis 3095 ths or is not it?I was going to buy the piece

author: jpanhalt
author_rank: Super Contributor
timestamp: October 20, 2018, 04:15:47 pm
content: Did you read Mike Lee's post in my #3 link? If the failed device only has 4 pins, that limits what it can be -- i.e., not an opamp.

author: cesar1
author_rank: Contributor
timestamp: October 20, 2018, 04:20:14 pm
content: ichiiiis truei read

author: cesar1
author_rank: Contributor
timestamp: October 20, 2018, 04:22:03 pm
content: he said that can to be a common mode choke. 4 pads to the PCB. The white parts with "B3GA4"""I think that smoked part could be a common mode choke. 4 pads to the PCB. The white parts with "B3GA4" on them are Fujitsu signal relays. Datasheet for those is easily found with some searching on Fujitsu website.http://www.fujitsu.com/us/services/edev... tr-b3.htmlGood chance the choke burned up due to the high current through it from something else that is now shorted when you applied the high DC voltage.Someone has posted other pictures of this unit here:https://www.eevblog.com/forum/reviews/te... generator/It may be difficult to find out what that choke was as there may not be much for markings on it. Same goes for any chip capacitors, those generally not marked at all. Most resistors will have there nominal values printed on them. Though, its been my experience that precision ones (0.5% or 0.2%, etc) don't and may have some code letters instead."""

author: cesar1
author_rank: Contributor
timestamp: October 20, 2018, 04:26:14 pm
content: So I'm going to buy a commum mode choke 4 pins?it is?What is his datashhet?What is the specification then?

author: jpanhalt
author_rank: Super Contributor
timestamp: October 20, 2018, 04:32:00 pm
content: Quote from: cesar1 on October 20, 2018, 04:26:14 pmNo! READ and think about the dozens of other posts. Your assumption that that device is the culprit may be entirely off base. One of the posters I linked to suggested just jumpering the device (temporarily) to see if the rest of the circuit is OK.This thread is beginning to sound more like a problem caused by impetuousness that will only be exacerbated by more impetuousness. Read, understand, think, plan, THEN do.

author: cesar1
author_rank: Contributor
timestamp: October 20, 2018, 05:07:04 pm
content: jpanhalt,i jumper the circuit, is all okay. it was only this component that burnedI do not know which one to buy.This wave generator belongs to my son and he's here at home asking me to do it. in my country this equipment is very expensive and I can not buy other equipment. My son is here by my side.I know I was a little anxious, excuse jpanhalt, you're helping me a lot.I'm not an expert. I can change the part for another piece equal. I know what part I have to put in place.I do not know which one to buy.i want the datasheet this part

author: santosp
author_rank: Contributor
timestamp: February 03, 2023, 08:16:33 pm
content: In case that you have not seen this yet...https://www.eevblog.com/forum/repair/rigol-dg1022-sucsessful-no-output-on-channel-one-repair/