Blown up my Silent SDG 1062X AWG - Page 1
Forum section: electronics / repair

author: Mike99
author_rank: Frequent Contributor
timestamp: June 10, 2025, 06:03:53 pm
content: I was probing a faulty oscilloscope with my Siglent scope when one of the scope probe earth clips came off and touched a high voltage point. The Siglent was connected to the AWG via a USB cable.Both units went off. I switched the scope on again and it works fine but the AWG is dead. The fan comes on but nothing lights up.Is it possible to hazard a guess as to what has died in the AWG?Mike

author: Mike99
author_rank: Frequent Contributor
timestamp: June 11, 2025, 09:35:41 am
content: The high voltage point turned out to be 1kV ☹️.My guess is I've fried the processor so it's off to Siglent.Mike

author: ondraN
author_rank: Regular Contributor
timestamp: June 11, 2025, 10:33:22 am
content: Try to check power suply unit in generator. If high voltage went through the ground cable, only part of the PSU may be destroyed.

author: Mike99
author_rank: Frequent Contributor
timestamp: June 11, 2025, 06:55:46 pm
content: Thanks, I already did that and all the voltages are present and correct.Mike

author: Zenith
author_rank: Frequent Contributor
timestamp: June 12, 2025, 11:13:15 am
content: So the scope and AWG were connected to earth. I assume the USB was also connected to earth. You connected 1kV to the scope's earth. I'd expect a few sparks and a bang as something gave, probably the 1kV source in the scope under test. But if part of the scope's earth path gave way first, you could have 1kV in all sorts of unexpected places and induced voltages high enough to do damage.Before sending off the AWG to Siglent, you might try a factory reset for it, or there may be a recovery involving an SD card, Ask tautech. It's certainly worth a try before paying for shipping and paying Siglent to fix it.I have a few old analogue scopes. If I'm investigating another scope or valve gear I usually use something like a Hameg 20MHz, on the grounds that you generally don't need much by way of performance, and if I wrecked one, I wouldn't be happy, but nowhere near as unhappy as if I wrecked a DSO.

author: 2N3055
author_rank: Super Contributor
timestamp: June 12, 2025, 11:23:26 am
content: Being wise is also about knowing when to give up.OP already made good decision. Off to Siglent for MB replacement.1kV injected in AWG is total destruction..Potentially any fine geometry semiconductor is gone.

author: Zenith
author_rank: Frequent Contributor
timestamp: June 12, 2025, 11:32:55 am
content: Being wise is also about not jumping to conclusions and trying an easy fix first, if there is one.

author: 2N3055
author_rank: Super Contributor
timestamp: June 12, 2025, 12:25:15 pm
content: Quote from: Zenith on June 12, 2025, 11:32:55 amThere is no easy fix.This is not a 5 valves tube amplifier with 50 components.Spartan6 FPGA used will blow if you apply >5V to it..DACs too..same for CPU or RAM and FLASH chipsThere is too much potential for damage. Also degradation too..

author: ondraN
author_rank: Regular Contributor
timestamp: June 12, 2025, 12:51:39 pm
content: If I understand correctly, the oscilloscope was connected via USB to a generator (AWG Siglent). After shorting the HV, the oscilloscope was able to start up, but the generator is dead. Is that right Mike99?

author: Mike99
author_rank: Frequent Contributor
timestamp: June 12, 2025, 03:31:05 pm
content: OK, the Siglent scope and AWG were connected to mains earth. The scope and AWG were connected by a USB cable and the AWG was connected to the unit I was testing (another scope) by a BNC cable. The Siglent scope probe earth clip made brief contact with a 1kV supply on the scope being tested.The Siglent scope and the scope being tested are fine. The AWG is dead.I bought the AWG from the UK distributor which is just 5 miles away from my home. They will return it to Siglent so there will be no shipping cost. They are getting me an estimate for replacing the main PCB which is where I suspect the fault lies.Mike

author: tautech
author_rank: Super Contributor
timestamp: June 15, 2025, 02:29:43 am
content: Quote from: Mike99 on June 12, 2025, 03:31:05 pmOh darn !Please report the outcome.

author: Mike99
author_rank: Frequent Contributor
timestamp: June 16, 2025, 12:10:51 pm
content: I'm afraid it's bad news for me. I'm in the UK and the Siglent repair facility is in Germany. The shipping and handling costs mean that repair is uneconomic ☹️.Mike

author: tautech
author_rank: Super Contributor
timestamp: June 16, 2025, 12:41:27 pm
content: SDG1032X or the new SDG1022X Plus could be considered worthy replacements.Don't ask why I'd recommend these....

author: Mike99
author_rank: Frequent Contributor
timestamp: June 16, 2025, 02:06:00 pm
content: The 1032x is discontinued and out of stock at the dealer. The other one isn't listedMike

author: TheDefpom
author_rank: Frequent Contributor
timestamp: June 20, 2025, 06:03:36 am
content: There is always theSDG2122XI mean SDG2042X cough...

author: Mike99
author_rank: Frequent Contributor
timestamp: June 20, 2025, 01:11:16 pm
content: Quote from: TheDefpom on June 20, 2025, 06:03:36 amInteresting ...

author: Mike99
author_rank: Frequent Contributor
timestamp: June 24, 2025, 02:11:08 pm
content: Quote from: TheDefpom on June 20, 2025, 06:03:36 amOK I have bought an SDG2042X. Now to look up the "upgrade" instructions 😀.I'd still like to try repairing my broken one. Does anyone know if Siglent sell PCB assemblies?Mike

author: tautech
author_rank: Super Contributor
timestamp: June 24, 2025, 03:06:49 pm
content: Quote from: Mike99 on June 24, 2025, 02:11:08 pmThey do but not I believe to the public.As an authorised service centre we can get them.Have a look in the 'SDG800 and 1000 thread' (Google it) for repair info but don't forget to also go through the faultfinding tips in the SDG1000X service manual.

author: Mike99
author_rank: Frequent Contributor
timestamp: June 25, 2025, 07:04:25 am
content: That's encouraging as my nearest Siglent dealer is just a few miles away and as I have bought several pieces of test equipment from them I'm sure they will help me locate a PCB.I'm pretty certain it's the rear board that's needed as that's where the voltage spike would have hit the generator via the USB cable and it also drives the front panel which is dead.BTW I have increased the bandwidth of my new function generator and my scope. It only took a few minutes thanks to this wonderful forum 😀.Mike

author: Mike99
author_rank: Frequent Contributor
timestamp: July 17, 2025, 06:50:41 pm
content: Good news. My local dealer ordered a digital board from Siglent in Germany and it arrived in a week at a very reasonable price.I fitted it today and the AWG is working again. It passes the functional tests in the service manual and I don't think it will need calibrating because I'm pretty certain the waveforms are generated on the other board.Mike

author: 2N3055
author_rank: Super Contributor
timestamp: July 17, 2025, 07:20:26 pm
content: Great news!

author: mawyatt
author_rank: Super Contributor
timestamp: July 17, 2025, 07:26:15 pm
content: Quote from: Mike99 on July 17, 2025, 06:50:41 pmAnother example why so many of us have chosen Siglent as our main GP test equipment supplierBest

author: mawyatt
author_rank: Super Contributor
timestamp: July 17, 2025, 07:44:21 pm
content: Quote from: Mike99 on July 17, 2025, 06:50:41 pmTell the "Boss", ughIjust blew upMyAWGBut "Our" scope survivedIneed this AWG now for some important work, a better one might be necessarySince dealer is next doorI'llorder a replacement AWG, and see if they can order a replacement PCB for the bad AWGIfixed it and now "We" have 2 AWGsBrillant planBest

author: Mike99
author_rank: Frequent Contributor
timestamp: July 17, 2025, 08:45:33 pm
content: Quote from: mawyatt on July 17, 2025, 07:44:21 pmUnfortunately there is no boss and I paid for all this myself 🥺.Mike

author: Mike99
author_rank: Frequent Contributor
timestamp: July 17, 2025, 09:38:15 pm
content: Oh by the way, the scope did suffer a small hit. The rear USB socket that was connected to the AWG is dead but the front one still works. I think they are both on the main board so that won't be an economic repair.Mike

author: tautech
author_rank: Super Contributor
timestamp: July 17, 2025, 10:06:37 pm
content: Quote from: Mike99 on July 17, 2025, 09:38:15 pmModel ?

author: mawyatt
author_rank: Super Contributor
timestamp: July 18, 2025, 01:02:39 am
content: QuoteWas thinking more of a "Home Lab" where the "Boss" is you know who, and you end up paying for everything anywayBest

author: Mike99
author_rank: Frequent Contributor
timestamp: July 18, 2025, 07:39:03 am
content: Quote from: tautech on July 17, 2025, 10:06:37 pmSDS2202X-EMike

author: Mike99
author_rank: Frequent Contributor
timestamp: July 18, 2025, 07:43:03 am
content: Quote from: mawyatt on July 18, 2025, 01:02:39 amOh I see 😀. Well fortunately my Boss doesn't pay much attention to what goes on in my workshop.Mike

author: tautech
author_rank: Super Contributor
timestamp: July 18, 2025, 08:53:42 am
content: Quote from: Mike99 on July 18, 2025, 07:39:03 amMight be a simple repair.Hunt out one of the X-E teardowns and you might be able to identify the USB controller chip.Good luck......actually I have some warranty replacement PCB's so might be able to find what they use.....

author: Mike99
author_rank: Frequent Contributor
timestamp: July 18, 2025, 09:22:41 am
content: Quote from: tautech on July 18, 2025, 08:53:42 amBrilliant, thank you.Mike

author: tautech
author_rank: Super Contributor
timestamp: July 18, 2025, 10:03:36 am
content: Quote from: Mike99 on July 18, 2025, 09:22:41 am2x X-E PCB's both SOIC-81104 X-E....rear USB-A 2206-1YM1202X-E....no rear USB-A Front supported with 2206-1YMOne was a 2206A... dunno what the difference is, you need look them up.Good luck.

author: Mike99
author_rank: Frequent Contributor
timestamp: July 18, 2025, 01:36:55 pm
content: Quote from: tautech on July 18, 2025, 10:03:36 amThank you so much for that. I have SMD rework facilities so it shouldn't be too hard if I can get the part.Mike

author: Mike99
author_rank: Frequent Contributor
timestamp: July 18, 2025, 02:06:35 pm
content: No luck finding that part number. Any chance you could post a photo of the IC please?There is an MIC2206-1.8YML but that's a voltage regulator.USB interface ICs have many more legs ...I suppose the SOIC-8 could be a power supply device. I could invest in a USB port tester to see if the voltages are correct.Mike

author: tautech
author_rank: Super Contributor
timestamp: July 18, 2025, 02:23:46 pm
content: Quote from: Mike99 on July 18, 2025, 02:06:35 pmDoes it have power ?Will it charge say your cellphone ?

author: Mike99
author_rank: Frequent Contributor
timestamp: July 18, 2025, 02:30:25 pm
content: Quote from: tautech on July 18, 2025, 02:23:46 pmYes it charges my phone but does not recognise an AWG or a memory stick.Mike

author: tautech
author_rank: Super Contributor
timestamp: July 18, 2025, 02:39:28 pm
content: Quote from: Mike99 on July 18, 2025, 02:30:25 pmOkay. Other USB socket traces go back to a 40 pin IC, a small one say 10mm square.Too late to get the PCB's out now, nearly asleep ........

author: Mike99
author_rank: Frequent Contributor
timestamp: July 18, 2025, 02:41:08 pm
content: No hurry, sleep well and thanks again.Mike

author: 2N3055
author_rank: Super Contributor
timestamp: July 18, 2025, 03:20:13 pm
content: I cannot find what exactly scope is in question. I don't see OP ever stating exactly.Scope is SDS2202X-EFor SDS1104X-E chips are:2026A is Microchip MIC2026A Dual-Channel Power Distribution SwitchUSB2514B USB controller is actually 4 port USB 2.0 Hi-Speed Hub Controller.For reference see Microchip USB2514B.You might need to change both hub controller and power switch.Switch should be simple to remove and resolder, but USB hub chip has large ground pad below that might take some care to desolder and resolder. Be very careful.

author: Mike99
author_rank: Frequent Contributor
timestamp: July 18, 2025, 06:06:31 pm
content: Quote from: 2N3055 on July 18, 2025, 03:20:13 pmThanks for that. I presumed there would be one controller driving both USB ports, but the front one works fine so I'm a bit puzzled, and as the rear port charges my phone the power switch should be OK? Unless one of the ports on the controller is damaged and the rest are OK?Mike

author: 2N3055
author_rank: Super Contributor
timestamp: July 18, 2025, 07:26:30 pm
content: Quote from: Mike99 on July 18, 2025, 06:06:31 pmI don't have that scope so I cannot look into it.But it could be that there is some protection that is shorted, or that data channels are damaged, or even that data channel is damaged and the power swich is shorted so power is constant.Take a look at the IC in your scope and if they are the same, they can easily be ordered from Mouser for few €. If you can I would replace both, just in case. Overstress can partially damage chips that can degrade them gradually and they break at later time.Good news is that IC is USB hub. If front USB works, that must mean that all the parts until the hub are OK.

author: Mike99
author_rank: Frequent Contributor
timestamp: July 18, 2025, 09:32:59 pm
content: OK thanks again, I'll look into it.Mike

author: Mike99
author_rank: Frequent Contributor
timestamp: July 19, 2025, 08:55:30 am
content: Hmm, I've had a look at that USB controller and while I'd have no problems reworking the pins I think the heatsink would be a challenge if it's soldered to the board. Without a scrap board to practice on I wouldn't want to risk it. One working USB port is better than none 😳.Mike

author: m k
author_rank: Super Contributor
timestamp: July 20, 2025, 01:00:26 pm
content: Have you tried to figure out how the voltage went through them?Maybe the weak spot was a strong protection spot.

author: Mike99
author_rank: Frequent Contributor
timestamp: July 21, 2025, 10:30:31 am
content: Quote from: m k on July 20, 2025, 01:00:26 pmWell it happened when the earth lead on the scope probe fell off and touched a 1kV supply. I suppose there might be a protection circuit on the USB port but without a schematic I would need to take the scope apart and I'm using it fairly constantly.Mike