hybridfree/eevblog-posts huggingface dataset:
Rigol DP832 - Channel 1 Analog Board - wanted - Page 1
Forum section: electronics / repair

author: pedro48
author_rank: Contributor
timestamp: August 07, 2021, 07:42:14 am
content: I'm one many folks that has managed to fry the Channel 1 analogue board of my venerable Rigol DP832. Replacing the usual dead components F3, R52, Q5, Q15 has at least got most of the analogue board back working but has failed to resolve a couple of issues. Thanks to TurboTom and others for the notes, I now have a bit of an understanding on the functions on the board, and have documented about 60% of the schematic.There are two faults remaining, they may be linked, that being there is 33.1V at the output at idle without enabling the CH1 ON switch, also that voltage setting works on the digital board, but not the analogue. The waveform out of the MCU looks about right. The lower half of the waveform at U6 ( CC Set) operates correctly in small increments 0-3.1A. As does the upper half the waveform (CV set) between SET voltages 12.0 -30v. voltages set 0v-11.7v are highly erratic, and the charge pump reflects the MCU signal leaving pin 11I'm looking to see if anyone has a spare DP832 CH1 Analog board you'd be prepared to Sell or Gift - Working or Not. I have already managed to have a couple of 'accidents' with the board live on the bench on extension cables. And circuit tracing is necessarily incomplete as many traces disappear under components and some paths are positively diabolical (E.g U3 below). With a spare board, tracing the PCB under chips become viable.I realise this is a long-shot, appreciate any helpcheers Peter
RIGOL DP832 channel 3 fault/Showing "UR" - Page 1
Forum section: electronics / repair

author: SHARANYA
author_rank: Contributor
timestamp: May 27, 2022, 07:29:50 am
content: HiI needed 60v/3A for some troubleshooting & in order to get that,I made a series connection between Ch1 & 2.But due to a ongoing con call,by mistake,I inserted the negative probe to Ch3's positive.Then I shorted the output & instantly some bad smell came out from DP832.Ch3 was showing that "Ch3 is disabled due to overvoltage protection" sort of message.After the incident,Ch1 & 2 supposed to be working fine.Voltage regulation for Ch3 is ok but it is unable to give 3A output whenever I am shorting the probes.The o/p current is varying instead of a steady 3A & the display is showing for "5v/3A at UR".The "UR" is changing to "CV" sometimes.What can be the fault?Is the o/p driver transistor or the op amps gone bad? I live in a remote village in India & unable to get any help/service from Rigol here so I have to repair it all by myself so appreciating any kind of help.I am attaching pics for the connection I made by mistake & the Ch3 output right now whenever shorting....Also,wondering if anyone is having schematics for the PSU.That would be of great help.Thanks in advance...

author: thm_w
author_rank: Super Contributor
timestamp: May 27, 2022, 09:29:39 pm
content: Probably output transistor would be affected yeah. You'll want to take it apart and measure, look for burned parts, etc.Did you read through the previous DP832 repair threads?https://www.eevblog.com/forum/testgear/rigol-dp832-smoked-channel-1/https://www.eevblog.com/forum/repair/rigol-dp832-power-supply-repair-u18-replacement/
Rigol DP832 - Display issue/backlight - Page 1
Forum section: electronics / repair

author: ee2000
author_rank: Newbie
timestamp: September 07, 2020, 01:54:29 pm
content: HiWell, I guess this is not my most lucky day, today as i was using my DP832 i noticed within short timethe display on my power supply started "fading", it almost looks as there backlight increased and colors decreased in intensity.I have been into the menu and changing backlight/contrast, ect. but only makes it worst,below is a picture of the display where the issue is visible:" alt="" class="bbc_img" />Since i took the picture it has got worse, has anybody an idea on the HW issue I am facing ?Thank a lot in advance.

author: coromonadalix
author_rank: Super Contributor
timestamp: September 07, 2020, 02:07:54 pm
content: Seems the lcd is failing at some point ... if you can get the lcd part number you may find a new one, is it under warranty ?You could check the lcd flat / flex cable at both end if its well inserted ?

author: ee2000
author_rank: Newbie
timestamp: September 08, 2020, 06:38:01 pm
content: Thanks a lot for your suggestion, would anybody have a schematic for DP832 maybe ?Thanks in advance.

author: thm_w
author_rank: Super Contributor
timestamp: September 08, 2020, 10:22:25 pm
content: No one has a schematic.Open it up, look at the cables going to the LCD as suggested. Check voltages.
Rigol DP832 Voltage Jumping Around - Page 1
Forum section: electronics / repair

author: nlemoz
author_rank: Newbie
timestamp: February 26, 2021, 06:46:50 pm
content: I have a DP 832 which I've had for about 10 years.It's worked great this whole time.Recently, the voltage on channel 2 started wandering around.Usually it's only off by a volt or so, but sometimes it's been more.It even does it when there's no load.It's not a steady offset either, the voltage jumps around rapidly without any change to the load or settings.Current regulation seems to be fine.The other 2 channels seem ok.Any ideas what could have gone wrong?Would like to try a repair, although if someone knows a good repair shop in the Melbourne area, happy to outsource.Thanks in advance.

author: nlemoz
author_rank: Newbie
timestamp: February 26, 2021, 07:04:33 pm
content: Another pic just to show what happens with all 3 channels active and no load on any of them.
Rigol DP832 service manual - Page 1
Forum section: electronics / repair

author: jmibk
author_rank: Regular Contributor
timestamp: September 23, 2019, 09:02:41 am
content: I have some issues with a Rigol DP832 power supply, after a collegue tried to charge some batteries and switched the two outputs in parallel.After he connected the batteries with false polarity () the magic smoke escaped.So a schematic would be useful to repair the thing... Anyone?

author: thm_w
author_rank: Super Contributor
timestamp: September 23, 2019, 11:47:07 pm
content: https://www.eevblog.com/forum/testgear/rigol-dp832-smoked-channel-1/Check fuses, FETs, etc. Daves original repair video has some of this as well.There is a service manual for DP1308A, but yeah, no schematics, I don't think you will find any.

author: ted572
author_rank: Frequent Contributor
timestamp: September 25, 2019, 02:37:17 pm
content: This Rigol document (PDF) will help you understand what happened, and show you how to avoid this issue in the future.
Rigol DP832 "Temperature too high" error - Page 1
Forum section: electronics / repair

author: mhz
author_rank: Contributor
timestamp: July 10, 2020, 04:54:00 pm
content: Lately my Rigol DP832 power supply refuses to operate. After turning on any one of the channels, after a few seconds I get error message "temperature is too high, disable the out" and the output is turned off. This is with no load and with fan spinning as normal.Anyone encountered this and fixed it? I've poked around to see if I can find any obviously disconnected or damaged thermocouples with no luck. I've also tried disabling OTP but that seems to have no effect.
Rigol DP832A repair 1channel after burn - Page 1
Forum section: electronics / repair

author: DevilByte
author_rank: Newbie
timestamp: August 22, 2024, 11:52:37 am
content: Hi, I am facing the same problem as many rigol power supply owners. I have a rigol dp832a, I managed to burn 1 channel on it by connecting it to ground.1) The track between J23 and D6 was damaged (repaired).2) D6 was damaged (replaced with a new one)3) R52 was damaged (replaced with a new one)4) F3 next to J12 was damaged (replaced with a new one)5) Q16 IRFP250N was damaged (replaced with a new one)6) U27 LM317 was replaced just in case.After I assembled the power supply and turned on the first channel, on the display I see jumping numbers like Dave, but I don't understand where to dig. At the same time on the output zero. but if you start to set the voltage, the output appears the set voltage, but the numbers jump. And also LM317 is very warm as it seems to me. I also assumed that it is U55, but while the spare parts are on the wayBoard revisionm v03.02 2018-06-13
Rigol DS-1202CA - 200MHz - firmware problem - Page 1
Forum section: electronics / repair

author: kaldach79
author_rank: Contributor
timestamp: January 28, 2023, 01:18:02 pm
content: My old oscilloscope RIGOL DS-1202 CA has failed. It does not start. Only the backlight appears on the display, leds are blinking randomly, after power on. Probably the firmware is corrupt. I'm looking for the firmware or flash dump, but I can`t find it anywhere. Probably firmware on series 1000E doesn't work with it.

author: Adrian_Arg.
author_rank: Frequent Contributor
timestamp: January 28, 2023, 03:49:13 pm
content: Why don't you send an email to rigol support, it takes time but they usually answer.I do not want to misinform, but the ds1202 ca is not the same series as the ds1000z, it is a question because it is rare that it is not on the rigol site

author: kaldach79
author_rank: Contributor
timestamp: January 28, 2023, 04:15:26 pm
content: I wrote to rigol support. Unfortunately, they replied that the product has been discontinued for a long time and do not provide support
Rigol DS1052/DS1102 Schematic Diagrams - Page 1
Forum section: electronics / repair

author: Singapura
author_rank: Regular Contributor
timestamp: April 02, 2022, 04:47:35 am
content: For Rigol DS1052/DS1102 owners, you can find the schematic diagrams to your equipment in the following link, thanks to Helene:http://rigol.codenaschen.de/index.php/SchematicsThe flipside is, the schematic diagrams are all hand drawn in pencil so it can be quite messy and hard to read for some people.Well, not to worry. I have redrawn them using Microsoft Visio and posted them here for those who may need it.Also, if you want to find out more, please go to my blog:https://visio-for-engineers.blogspot.com/2018/08/from-sketch-to-streamlined.htmlThanks and have a nice day! Stay safe and well, my friends!Warmest regards

author: Fraser
author_rank: Super Contributor
timestamp: May 12, 2022, 11:14:54 am
content: Great work. Thank youFraser

author: PinheadBE
author_rank: Regular Contributor
timestamp: February 24, 2025, 09:51:57 am
content: Quote from: Singapura on April 02, 2022, 04:47:35 amBroken link

author: serg-el
author_rank: Regular Contributor
timestamp: April 22, 2025, 06:15:54 am
content: Forgot to specify the operational amplifier for the analog input.AD8510#1

author: lern01
author_rank: Regular Contributor
timestamp: April 28, 2025, 06:00:31 am
content: 补上了AD8510 #1
Rigol ds1052e boot screen ok then only flickering white lines displayed - Page 1
Forum section: electronics / repair

author: maybepanic
author_rank: Contributor
timestamp: September 03, 2023, 02:19:44 pm
content: Hey,I've got a Rigol ds1052e that's broken. I don't use it often and when I tried switching it on today the "boot screen" was fine showed the model number and stuff but after boot up the only thing that got displayed were a bunch of flickering white lines.There are some reverse engineered schematics available but I am unsure where to even start looking for the fault.From what I've read here on the forum most people seem to just re flow the cyclone branded chip, which appears to be the main processing unit.
[SOLVED] Rigol DS1052E inputs not working and no relays working - Page 1
Forum section: electronics / repair

author: taylorit
author_rank: Newbie
timestamp: October 28, 2021, 11:15:33 pm
content: Hi Guys,Just wondering if someone could help out with my Rigol DS1052E. None of the inputs work, if I inject signal up stream to Relay #1C or Relay #2C (that then I can see the signal shown on the screen. When changing inputs AC/DC/GND or scale no relays click. PSW voltages are ok apart from the Pin 9 -12v DC. This is only outputing 9.71vdc. I assume this is one of the main supply rails, I have also tested the L7905 it is outputing -5v but thinking it is a -12V issue.? i have checked the 100uf and 330uf caps but can't figure why this rail has dropped in voltage, could it be the MUR460 diode that is faulty.? I'm referencing to the diagrams provided at -http://rigol.codenaschen.de/index.php/SchematicsI have also tested pin 16 on each 74HA595 and they both have +5v.Any help please :-)

author: taylorit
author_rank: Newbie
timestamp: November 02, 2021, 09:24:08 pm
content: In Test Gear forum, solved the issue. It was the surface mount chip with Cyclone on it that I reflowed and solved issue.
Rigol DS1052E knobs and display have turned funky! - Page 1
Forum section: electronics / repair

author: mogul
author_rank: Newbie
timestamp: June 09, 2020, 07:33:16 pm
content: 'Aloha Friends!My aging Rigol DS1052E has stopped working. This has happened before where I temporarily fixed encoders by spraying them with contact cleaner. (probably a stupid thing)Anyway, now a year later knobs are again very much not working, but this time the display is weird too.Notice how it shows two trigger lines. The two blue areas on the upper haft, not sure whats going on there either. This shows even if I have disconnected the button/knob board completely. so it isn't simply the result of an encoder shorted out badly.Suggestions on where to start with this? (or should I simply trash it and get a new one?)

author: dave j
author_rank: Regular Contributor
timestamp: June 09, 2020, 08:13:26 pm
content: You've switched delayed scan on. Press the horizontal section's menu button. You'll see that 'Delayed' is ON. Press the button next to it to turn it OFF.

author: mogul
author_rank: Newbie
timestamp: June 10, 2020, 05:30:22 am
content: Quote from: dave j on June 09, 2020, 08:13:26 pmFantastic. how foolish of me. thanks!Next is to figure out which one of the 6 encoders that is in need of replacement. I will see if I can work that one out.

author: Fractal
author_rank: Contributor
timestamp: April 24, 2021, 04:00:49 pm
content: Hey mate, hope you don't mind the unearthing; I just got my hands on one of those and it had the exact same issue.I somehow managed to fix it for now using contact cleaner (I had to place it face up and blow dry air to make sure the fluid goes all the way into the contacts), but it seems pretty damn fine for now!Did that fix hold up in the end or did you have to replace the encoders anyway?

author: xavier60
author_rank: Super Contributor
timestamp: April 24, 2021, 10:56:02 pm
content: Contact cleaner alone will not permanently fix scratchy encoders switches and Pots. A made for the purpose contact treatment oil is needed.Or as I have been using for 20 years, PAO synthetic oil, usually marketed as refrigeration or air compressor oil.
Rigol DS1052E "loose component" - Page 1
Forum section: electronics / repair

author: Hanatsu
author_rank: Newbie
timestamp: November 18, 2022, 02:52:30 am
content: Hi, thought I create an account here to see if anyone can help me with this weird issue.I was moving this old Rigol scope around on the bench and heard something rattling around inside. Took it apart and found a loose component inside. It doesn't look damaged. Part number is SC566, it's a small SMD SO-8 package. I assume it's this one: ST93CS566 from manufacturer ST. Supposed to be an EEPROM.What's this for and where is the actual component supposed to sit? I looked around for 20min and didn't find anything out the ordinary. Haven't noticed anything wrong with the scope either, could be some function that I don't use that's affected though.Appreciate any insight.

author: SMdude
author_rank: Frequent Contributor
timestamp: November 18, 2022, 03:14:37 am
content: Have you owned this scope since new?Is there any evidence of solder on the pins?I would suspect that someone has sat this ic on top of the scope and it has fallen in through one of the vents or openings.

author: Hanatsu
author_rank: Newbie
timestamp: November 18, 2022, 03:20:05 am
content: Yeah. Bought it new. It was some time ago now but I believe it was inside some metal shield I found it. Can't remember it I dealt with such chip at some point either. It's nothing I got in my lab at least. Guess it's possible but hm...Oh yeah, chip looks really clean. Could be a thin layer of solder, it's kinda glossy on the legs.

author: beatman
author_rank: Regular Contributor
timestamp: November 18, 2022, 04:39:01 am
content: maybe from the factory? i have found inside on an motu 896mk3 15 years a go one more printed plastik label.is instaled front of the unit from one side to the other to show all the parameters and was one more inside behind the front panel.😂
Rigol DS1052E On-Off Switch - Page 1
Forum section: electronics / repair

author: firewalker
author_rank: Super Contributor
timestamp: August 07, 2023, 11:34:43 am
content: I have a Rigol DS1052E with a broken On-Off Switch. Does anyone now if there is a replacement part? Can anyone identify the maker?Alexander

author: xrunner
author_rank: Super Contributor
timestamp: August 07, 2023, 11:55:10 am
content: It looks like you have removed it. If it's truly broken as you say, i.e. going in the trash, I'd try to take it apart and check the inside. If you can pry the switch case apart you may be able to repair it. It should come apart by prying metal tabs, and go back together at least one time.

author: firewalker
author_rank: Super Contributor
timestamp: August 07, 2023, 11:59:43 am
content: I took it apart but the plunger broke internally and completely deformed (the students kept pressing with force) beyond repair the small metal blades.Alexander.

author: firewalker
author_rank: Super Contributor
timestamp: August 08, 2023, 07:59:40 am
content: Its seems that with minimal filling a rocker switch, fits nicely.Alexander.

author: Haenk
author_rank: Super Contributor
timestamp: August 08, 2023, 09:12:15 am
content: Hint: Google for "TV-5 switch". Plenty offerings...Likehttps://www.ebay.de/itm/272280971139

author: firewalker
author_rank: Super Contributor
timestamp: August 08, 2023, 09:23:54 am
content: I couldn;t find none of those in my local supplier. And I couldn't locate it to TME or Digikey to add it to a pending order I had. I had to repair it this week.BTW I believe the maker is BJ.Alexander.
Rigol DS1052E - input resistor tolerances  - Page 1
Forum section: electronics / repair

author: szafranski
author_rank: Contributor
timestamp: July 19, 2020, 03:36:10 am
content: Hello, thanks for awesome community. I have a question related to Rigol DS1052e.I have to change input resistor in one of the channels - photo attached. Do I need to use 0.1% one - hard to order, or just "normal" 1% is ok?Thanks!

author: JohnPi
author_rank: Regular Contributor
timestamp: July 19, 2020, 05:50:29 pm
content: This (1 MΩ) affects the 10:1 attenuation from a probe. So its tolerance affects that. The scope is only about 2 % accurate, so a 0.1 % resistor may be overkill. You could order a few 1 MΩ and choose the best, or get some 1.8 MΩ and 2.2 MΩ and sort them so that 2 in parallel will be close to 1.00 MΩ.

author: szafranski
author_rank: Contributor
timestamp: July 19, 2020, 06:30:39 pm
content: Thanks for response. Those are actually 953KOhm ones so they are involved in "standard" X1 operations I think. Regardless, am I suppose to change those resistors on both channels or one is enough, assuming that second is fully functional? Thanks!

author: szafranski
author_rank: Contributor
timestamp: July 20, 2020, 01:23:43 am
content: I mean worst case scenario 953K Ohms resistors (with 1% tolerance) one could be 943K and second one could be 962K. Could this be an issue when comparing signals etc? Sorry if obvious, not entirely sure how scopes work (yet!).

author: David Hess
author_rank: Super Contributor
timestamp: July 20, 2020, 09:37:52 pm
content: Modern designs (since the 1970s!) tend to use a low frequency two resistor attenuator whose total input resistance is 1 megohm to make up the input resistance instead of a separate 1 megohm resistor. The attenuation could be anything because it will feed a later amplifier which restores the DC value.

author: szafranski
author_rank: Contributor
timestamp: July 21, 2020, 08:20:40 am
content: Not sure what a conclusion is but I soldered generic resistor from the shop (about 950kOhms on a meter) and everything seems to work fine
Rigol DS1054 Weird Channel 1 - Page 1
Forum section: electronics / repair

author: AdamHerbst
author_rank: Newbie
timestamp: April 11, 2024, 02:48:31 pm
content: Hello Everyone, attached I have a photo of the inputs for my Rigol DS1054. Every channel but channel 1 seems to be working in order. Channel 1 is very wonky. What would be the best course of action for a repair? Opening up the oscilloscope probing the inputs, or could it be a firmware issue? I will be doing both, but im just wondering if someone before me had this problem and could share a little bit of wisdom.~ Adam

author: GGMM
author_rank: Frequent Contributor
timestamp: April 11, 2024, 03:00:13 pm
content: hello,See here some small diagram tipshttps://www.eevblog.com/files/Rigol-DS1054Z-Schematic-DiffAmp.pdfhttps://fr.scribd.com/document/383431220/Rigol-DS1054Z-Schematic-FrontEndI think we need to dig there to the inputBasic thing, you did the test to invert the probes and see which are all at *10Confirm 1054Z.I don’t know any morecdt

author: wasedadoc
author_rank: Super Contributor
timestamp: April 11, 2024, 03:05:27 pm
content: I doubt that could be a firmware problem.Is it the same for all settings of CH1 Volt/div? (Adjust input level appropriately)

author: 2N3055
author_rank: Super Contributor
timestamp: April 11, 2024, 03:14:13 pm
content: Check the probes first. Try exchanging probe from a "good" channel first.Probes that com with the scope are not very robust.

author: wasedadoc
author_rank: Super Contributor
timestamp: April 11, 2024, 03:24:01 pm
content: Quote from: 2N3055 on April 11, 2024, 03:14:13 pmThe rising and falling slopes of the displayed CH1 are different. I don't think a fault in a passive probe could do that. There is also delay. Looks to me like a hardware problem in the scope.

author: GGMM
author_rank: Frequent Contributor
timestamp: April 11, 2024, 04:48:57 pm
content: hi,also look at the ladderson ch1 the signal seems to make 3v peak to peak6v for the otherscdt

author: 2N3055
author_rank: Super Contributor
timestamp: April 11, 2024, 06:12:10 pm
content: Quote from: wasedadoc on April 11, 2024, 03:24:01 pmIt can definitely be the probe..It can be channel but also probe.
Rigol Ds1054z channel 3 problem - Page 1
Forum section: electronics / repair

author: huu_tri0101
author_rank: Contributor
timestamp: January 16, 2023, 03:03:26 am
content: Hi Everyone,I recently "turn on" my Rigol Ds1054z after 9 years it has stayed in the dark..I did "the self calibration test" and it get stuck at channel 3. So I hook channel 3 (purple colour) up to the generator on the oscilloscope and channel 3 can measure the signal but on the 1V,2V,5V and maybe 50V,100V scale it can't see the signal. I upload the clip here. so please take a look at it.https://youtu.be/6JZo4Ek7j9II open the oscilloscope, the Pcb, the power supply, everything looks fine to me. Does anyone have any ideas, suggestions or experience of this problem?Any help would be greatly appreciatedThank you19/01/2023: More detail on the problem:* all remain 3 channels ( 1,2,4) are working fine with scope reference point.* Channel 3 problem:+ Connect channel 3 to scope reference point+ Push the "CH3 button": hear the relay clicks (no matter which range it's mV or V, this is the same for all channel 2,3,4 )+ Start from 5mV to 500mV range: CH3 is able to see the signal.+ At 1V and 2V range: CH3 is UNABLE to see the signal.+ At 5V range: hears the relay clicks ( this is the same for other channels): CH3 is able to see the signal.+ At 10V and 20V: CH3 is able to see the signal.+ At 50V and 100V: CH3 is UNABLE to see the signal.As the clip from Dave I can see there is only one relay for each channel. With this relay the Rigol Ds1054z can choose to by pass the attenuator or not. With my understanding, the function of Attenuator is reduces the power of a signal so if attenuator's CH3 is fail, it will fail on all the small voltage range but the CH3 is not act like it fails on attenuator. So now I'm thinking the problem is on the vertical control position part.

author: beatman
author_rank: Regular Contributor
timestamp: January 16, 2023, 02:20:39 pm
content: maybe after so long time the crap psu capacitors gone?what environment contitions was the scope for 9 years?humidity?hot room?

author: huu_tri0101
author_rank: Contributor
timestamp: January 16, 2023, 03:06:24 pm
content: Thank you for your suggestion but all 3 remain channel are working fine.

author: shakalnokturn
author_rank: Super Contributor
timestamp: January 16, 2023, 09:48:08 pm
content: I haven't been round looking for internal photos I have my own repairs to tackle tonight.If it's displaying normally on low V/div. settings (Is it or are there other issues there?) and not on high ones I'd be looking at whatever is used for attenuation on the front-end.
Rigol DS1054Z - PSU Schematics /Missing components  - Page 1
Forum section: electronics / repair

author: DidierAche
author_rank: Newbie
timestamp: April 24, 2017, 03:06:18 am
content: Hi Everyone,I'm looking for the schematics or reference of the 2 missing surface mounts components of this PSU for my Rigol DS1054ZI've attached a picture and marked the missing components.Many thanks in advance !DA

author: ataradov
author_rank: Super Contributor
timestamp: April 24, 2017, 03:32:46 am
content: Why do you need this? They are missing for a reason.

author: MarkF
author_rank: Super Contributor
timestamp: April 24, 2017, 04:25:44 am
content: Dave did a teardown of the DS1000z scope some time ago and went through the power supply. I don't specifically remember talking about those parts but it may help you. I don't ever remember seeing a schematic other than one Dave traced out the front end and how Rigol does the bandwidth limiting.

author: DidierAche
author_rank: Newbie
timestamp: April 24, 2017, 03:52:43 pm
content: Thank you Alex,The reason for my asking is that this PSU is not working - looks like poor soldering and these 2 components are missingI've see other pictures of these board where the components are in place but the picture resolution is not good enough

author: DidierAche
author_rank: Newbie
timestamp: April 24, 2017, 03:56:45 pm
content: Thank you Mark,I watched the video but it doesn't go into these details ... I was wondering if someone would be able to share a picture of their board with a focus on these two areasI know i'm asking for a lot ... Many thanks in advance

author: ataradov
author_rank: Super Contributor
timestamp: April 24, 2017, 04:22:09 pm
content: Quote from: DidierAche on April 24, 2017, 03:52:43 pmThe soldering looks fine on this board, and it is pretty clear that those components were not installed by the manufacturer.Although looking at this picturehttp://www.experimental-engineering.co.uk/wp-content/uploads/2015/08/IMG_20150821_134321.jpg, those are resistors with markings "Z6A1" and "6202".And you have examples of both of them on the board, so you can just measure their value, instead of decoding cryptic codes.A close up picture with sharp focus would help to determine if they were actually installed there previously.

author: DidierAche
author_rank: Newbie
timestamp: April 24, 2017, 11:45:08 pm
content: Many Thanks Alex!This is perfect - I'll keep you guys updatedAgain much appreciatedDidier

author: DidierAche
author_rank: Newbie
timestamp: May 29, 2017, 08:47:44 pm
content: Two components replaced - all is working fine nowThank you All

author: tooki
author_rank: Super Contributor
timestamp: May 30, 2017, 11:54:18 am
content: Quote from: DidierAche on May 29, 2017, 08:47:44 pmNamely...?

author: victagayun
author_rank: Newbie
timestamp: July 18, 2020, 05:05:00 pm
content: Hello,My DS1074Z got spoilt.I think I saw an explosion on the power supply because I saw the light of the explosion from its back.Does this SMPS always have this problem?
Rigol Ds1074Z damaged 25X40   - Page 1
Forum section: electronics / repair

author: KrystianMac
author_rank: Newbie
timestamp: February 25, 2025, 09:11:29 am
content: Hello everyone,I have a Rigol DS1074Z oscilloscope that needs repair. The memory (BIOS) in the Winbond 25X40BV chip is damaged, and the oscilloscope does not boot the software. The buttons remain lit but do not respond to the boot command via the ‘Help’ button to install the software from USB.Rigol’s service suggested replacing the mainboard, which makes the repair cost-prohibitive.Does anyone have this oscilloscope and could help with the repair or even provide a BIN copy of the 25X40 chip to attempt a fix?Thanks!Here is a file from my Rigol binhttps://drive.google.com/file/d/15dEGE1hjA7296PQWeMdi4Sj0hxSOsrCT/view?usp=drivesdkhttps://drive.google.com/file/d/1SgaSrV_LF8Rp3dbieMx7s7siHVbZHQ_w/view?usp=drivesdkhttps://drive.google.com/file/d/1VR1-aSEre1lszDc6AI5FOMueUoZGKVvs/view?usp=drivesdk
Rigol DS1102E Display Problem - Page 1
Forum section: electronics / repair

author: KA4KOE
author_rank: Newbie
timestamp: January 23, 2020, 01:02:42 am
content: My Rigol oscilloscope has been sitting up awhile unused. I turned it on. The buttons went thru their usual blinking but the display is totally blank; no illumination whatsoever. Thanks ahead of time for any suggestions.Philip Neidlinger
Rigol DS1102E showing negative signals on Channel 1 - Page 1
Forum section: electronics / repair

author: interconnect
author_rank: Newbie
timestamp: July 20, 2024, 06:29:45 pm
content: I recently got a Rigol DS1102E that my work was getting rid of. Channel 1 has some sort of issue where the signals are negative when they should be positive. The issue is only with Channel 1; Channel 2 appears to be Ok. I've tried swapping scope leads, so that's definitely not the issue. I see the same issue no matter the signal; they are always very low and negative. I have also tried doing a factory reset and the self-calibration procedure, but no luck there. I have attached a couple photos of Channel 1 versus Channel 2 using the built-in calibration signal generator.Anyone know what may be going on with it? A bad amplifier or something? I think it may be some sort of hardware issue. Has anyone seen this before or know what may be going on here?

author: wasedadoc
author_rank: Super Contributor
timestamp: July 20, 2024, 06:53:26 pm
content: Why do you say that CH1 is low? Photos show it is about five times larger than CH2.What are the probe attenuation factors set to in the scope menu? Those must be manually set to match the little switches on the probes.

author: interconnect
author_rank: Newbie
timestamp: July 20, 2024, 08:45:04 pm
content: I guess I meant it’s low in that it’s negative, when it should be positive. Scope and probes are both set to 1X.

author: 807
author_rank: Frequent Contributor
timestamp: July 21, 2024, 09:53:33 pm
content: Are you absolutely sure that the probe setting is set to 1X in the channel 1 scope menu? You would get that p-p reading if it was set to 5X. Not sure why it has a negative offset though.What display do you get if you press the "Auto" button.

author: 2N3055
author_rank: Super Contributor
timestamp: July 21, 2024, 09:59:19 pm
content: This scope have a setting in channel setting to Invert channel. Did you check if that is reason?

author: interconnect
author_rank: Newbie
timestamp: July 21, 2024, 10:34:03 pm
content: Quote from: 2N3055 on July 21, 2024, 09:59:19 pmYes, I did check that. Invert for both channels is off.

author: interconnect
author_rank: Newbie
timestamp: July 21, 2024, 10:35:41 pm
content: Just found that I am getting -17.2VDC on Channel 1 with nothing even hooked up!

author: vano
author_rank: Newbie
timestamp: December 15, 2024, 07:04:34 pm
content: Maybe I should run self-calibration for him?

author: interconnect
author_rank: Newbie
timestamp: December 15, 2024, 07:47:14 pm
content: Quote from: interconnect on December 15, 2024, 07:47:14 pmI mentioned in my first post that I already ran the self-calibration.
Rigol DS2072 Knob repair/replacement - Page 1
Forum section: electronics / repair

author: canadaboy25
author_rank: Regular Contributor
timestamp: March 12, 2020, 06:18:14 am
content: Hey guys, I have a Rigol DS2072 oscilloscope that had something fall on it and broke off the horizontal position adjustment knob. The large two-part selection knob on the top right was also cracked. It's not the plastic knob that is damaged, the metal stem of the switch is broken right off.Does anyone know of any sources for replacement switches that I can solder in? I did a search for the rotary switches for that oscilloscope but came up with nothing. I'm sure I'm just not using the correct keywords but I can't think of what else to try.Also, is the rotary switch for the trigger adjustment or vertical position adjustments the same as the horizontal position switch? If they are, worst case I can swap the switches around so that it is at least still usable. However, I would much prefer to replace all the damaged switches.Any suggestions are appreciated.

author: Mario87
author_rank: Frequent Contributor
timestamp: March 12, 2020, 08:01:41 am
content: I would have thought it would just be a standard rotary encoder. Try opening it and seeing if there are any markings that would help identify it so you can get the same one or one as close as possible.

author: seronday
author_rank: Regular Contributor
timestamp: March 12, 2020, 12:22:09 pm
content: The Horizontal Position, Vert Position, Trigger level and Multifunction rotary encoders are all the same.I have used a Bourns PEC12R-4020F-S0012 rotary encoder to replace a faulty Vert Position control in a DS2102.They are available from Mouser, Digikey, RS Components etc.Regards.

author: Melt-O-Tronic
author_rank: Frequent Contributor
timestamp: March 14, 2020, 04:42:08 am
content: I replaced all of them in my DS2072A with these:ALPS EC12E2424407. I originally got mine on Amazon as a 5 pack. They seem to be getting pretty scarce.
Rigol DS4024 Repair - Page 1
Forum section: electronics / repair

author: FreezeSSC
author_rank: Contributor
timestamp: February 07, 2020, 05:02:42 pm
content: I have a DS4024 that seems to have shit the bed for the 2nd time, the first time it was covered under warranty but now the cost to repair exceeds purchasing a MSO5000, which i went and bought but it would seem a shame to throw this otherwise decent scope away.basically what took it out was a power flicker on the mains, scope shut off and never turned back on which is exactly what happened before. on opening it up I saw a there a P channel mosfet FDS4435A that was burned up, I bought a replacement part but unfortunately that didn't fix it as the drain side was shorted to ground. I tried to isolate the short as the powerplane branches off into different sections with large coil inductors between each plane but lost it as it went into what i assume is an inner layer close to where I think is the power regulator portion of the display.anyways I was hoping someone on this forum may have gone through this and could provide some insight, I tried but couldn't find and photos of the other side of the main board to see what kind of circuitry was behind the screen, and didn't have the heart to remove the panel label unless I knew i absolute had to. Ive attached a photo of where I lost the short, you can see that large power plane go into those large coil inductors, I removed them and then traced it to those smaller inductors where I then lost it. I'll post some high quality shots tonight of the LCD regulator section.
Rigol DSA815 Power Supply Failure - Page 1
Forum section: electronics / repair

author: jaimelaborda
author_rank: Newbie
timestamp: April 18, 2023, 04:18:31 pm
content: Hi all,I have a Rigol DSA815 spectrum analyzer with a faulty power supply (I believe...). The problem is that after pressing the power button, the fan starts to spin but there is no display.My first guess was about the display itself, so I checked and cleaned the LCD flat connector with IPA but nothing.I continue to measure voltages and surprise! There is no voltage in any of the rails of the power supply. Well, not all, there is a white cable that is always outputting +5V (+5VSB I guess, but it is white, not purple as in ATX power supplies, although the connector is very similar to the ATX one but with 14 pins instead of 20)I think it has a weird startup sequence because there is a signal (orange cable) that is an output from the mains PCB to the power supply to turn on the fan (goes to ground when fan is ON, and when OFF is about 2.5V). According to me, that should be the signal to indicate to the power supply to turn ON but this is not the case, and the power supply doesn't output any voltage.Any ideas?I attached some photos in case it helps.Video:https://photos.app.goo.gl/9nbZvaFj5Yh9pUbZ8Thank you very much in advance to all of you.Best regards,Jaime.

author: coromonadalix
author_rank: Super Contributor
timestamp: April 18, 2023, 05:20:36 pm
content: For the wire colors, any companies can use / define their own colors if its not a real say computer psuSome talk here about voltageshttps://www.eevblog.com/forum/testgear/rigol-ds2000-hardware-version-2-0/100/Reply #103copy paste did not work
RIGOL DSA815 WITH BROKEN DISPLAY - Page 1
Forum section: electronics / repair

author: KB7GP
author_rank: Newbie
timestamp: September 24, 2025, 06:24:27 am
content: I broke the display on my Rigol DSA815 tonight... aargh! The glass is broken and the right third of the display is dead. I managed to pull it over off the shelf onto my bench top and I just happened to have a properly positioned dummy load where it landed, face down. Now for all intents and purposes, it appears that the instrument is working as I can fanigle my way through finding a frequency etc.Question...Has anyone had a similar misfortune and gone through the process of replacing the display themselves? I sent a questionnaire to Rigol and I am waiting for a response. Mainly cost to service(?) Cost of a replacement part (?). Hopefully I will hear something. I have found a "replacement" display online (EBay) and they seem to come from China with an associated lead time. Also, it appears that those displays do not have the glass.Thanks for any information. Dave KB7GP
Rigol DSG 3060 / 3030 - Page 1
Forum section: electronics / repair

author: vishaldotgupta
author_rank: Regular Contributor
timestamp: September 06, 2022, 01:40:51 pm
content: Hii have a rigol DSG sign Gen with corrupted broken Flash memory. If any one has a flash dump of on the controller board, please share. i need it for DSG 3060, 6 GHz unit non IQ modelpics of mother board attached
Rigol MSO2202A repair - Page 1
Forum section: electronics / repair

author: MetalHead
author_rank: Contributor
timestamp: July 03, 2025, 01:06:01 pm
content: Hello guys!I need some help/advice in a problem that I have with Rigol MSO2202A scope.I bough this scope on China's second-hand marked as "not working". When I first tried to turn it on there was no responce. I disassembled the mashine, while keeping the power supply connected to the main board and noticed a ticking sound. Also the green LED on the main board was flashing in sync with the sound. So my first guess was that there is a short on a board somewhere and PSU goes into protection.I inspected main board but found no obvious problems. I checked output of 7 LDO regulators which are all 1117-A that sit alongside main chips and they were ok.Then I decided to supply power rail-by-rail from my DC power supply that has two chanels and to my surprise the mashine turned on and booted! (you need at least 5V and 7.5V to boot the scope)Img1Img2However, the power consumption was about 1.82A (5V rail) and 1.4A (7.5V rail). I think this is a reason why power supply board was refusing to start..Next I took my thermal camera as I wanted to see what's going.The FPGA chips and ADC were getting hot very quickly. Xilinx Spartan 6 that is above the ADC was 70°C after maybe 2 minutes (this is with a heatsink attached). Rigo ADC chip, which is fact is (ADC08DL502CIVV/NOPB or ADC08DL500CIVV/NOPB) was also getting pretty hot, despite the fact that it was not receiving clock on CLK+ , CLK- from clock buffer IC ADF 4360-7. 25Mhz is comming in, but there is no output from 4360-7 (see Img3)Img3Img4So, what I did is I unsoldered ADC chip and the current on 7.5V rail dropped to 0.837A (from 1.4A). Scope booted up succesfully, but the traces for Ch1 and Ch2 dissapeared from the screen. FPGA that is above the ADC was also hot as before.So my questions are following:1. Why the mashine is drawing so much current? AC socked has a fuse that is rated 2A. What is the normal (working) temperature of FPGA chips?2. Despitte the fact that Rigol is booting up, can this be related to the firmware corruptin or similar? From where FPGAs are loading bitstream for self configiration?3. Another question is why ADC is getting hot if it does not receive a clock from a VCO buffer. Same for Spartan6 FPGA located just above it (they probably share the same clock)?
Rigol MSO5074 control repair - Page 1
Forum section: electronics / repair

author: R-1125F
author_rank: Regular Contributor
timestamp: March 03, 2025, 03:29:20 pm
content: The channel 1 veritcal control stopped working on my MSO5074. I had a similar problem to another member here:https://www.eevblog.com/forum/repair/rigol-mso5074-knob-repair/msg5627371/#msg5627371The small traces that run to the encoder broke becuase of poor mechanical design of the PCB. See photo. I repaired mine by scraping away some of the solder mask and soldering in a thin wire. All is working now but I expect more breakage in the future. It's a great scope but Rigol really could have done better on the design of the mechanical control board.

author: Swake
author_rank: Frequent Contributor
timestamp: March 07, 2025, 08:50:54 am
content: Good find.From your picture it looks like there is some glossy coating. Would that have been some resin or glue that was intended to reinforce it (but it didn't work out as well as they expected it)?

author: R-1125F
author_rank: Regular Contributor
timestamp: March 07, 2025, 01:16:21 pm
content: I think it's flux. It came off easily with alcohol. If it was a glue, it certainly did not hold up very well. The (too) small pads with came loose from the board. I think the Rigol engineers did not account for how much mechanical movement there would be if the control was bumped.
Rigol MSO5074 Knob Repair - Page 1
Forum section: electronics / repair

author: Russ_A
author_rank: Contributor
timestamp: September 02, 2024, 04:37:37 pm
content: I was working on a project using my Rigol MSO5074, which I’d fully unlocked thanks to the EEVBlog Forums, and hooked up my current probe to channel 4. It wouldn’t let me adjust the vertical scale on that channel using the knob. I could do it via the touchscreen only. So after some Googling and not finding anything I decided to run the panel button test mode, and lo and behold that knob wasn’t working at all. So I got to work taking it apart to get at the panel and hopefully find something obviously wrong.The scope is very easy to take apart and put back together because, like marriage, every screw is the same.Once I got to the button PCB it was obvious what had happened.Best I can figure is that some time in the past six months or so I had banged that knob from the side and half torn it off the PCB. Perhaps manufacturers could take note that through-hole components are far more robust than surface mount, especially for knobs and dials. Anyway I had torn three solder pads right off. I got to work doing the shittiest solder job possible to get them reattached but that didn’t work. Since the pads had been torn off there no longer was connection to the proper traces and vias. I was able to easily bypass one of the connections because I could see where the trace went.But that didn’t work either. That’s when I discovered that one of the pads ripped off probably connected with a via and no amount of mucking about with flux and solder could make a connection. I grabbed some jumper wires I had sitting around and, being the idiot that I am, connected them backwards. Cue the magic smoke as one of the wires overheated and melted its insulation.Good news though as after hooking it up correctly it still worked! Phew! So I got to work probing the other knobs to see where they connected to on the board. I started probing around on the board, using the other knobs to see where pins were likely connected on the board. I discovered that my bad pin was probably connected to the controller chip. Now I just had to find out which pin. I took a test lead and used a resistor lead to fasten a thin poker.With the oscilloscope powered on and in the key test mode I got to poking. Every now and then I’d poke the wrong spot and the display would go blank but it’d reboot fine. The key with this is that you have to poke each pin on the chip without shorting it to its neighbor, which is pretty hard. I did see a spark once because of this, but again, a reboot worked fine and all the other buttons tested ok. I must have run through the button test ten times.Eventually I found the right pin! And even better I found that it connected to a nearby test point. I soldered a wire onto it, threw some hot snot in there for support and did more shitty soldering.[ Specified attachment is not available ]PS, I expect I'll have to edit this post a few times to get the images working as I really don't know how to work around the bugs yet and there's no working preview.
Rilton Electronics Ltd 24012/E Variac  - Page 1
Forum section: electronics / repair

author: Mad Professor
author_rank: Regular Contributor
timestamp: December 14, 2024, 01:00:09 pm
content: Good day, everyone.This isn’t strictly a repair query, so please feel free to relocate this post to the most appropriate section if necessary.I’ve recently acquired a used Rilton Electronics Ltd 24012/E Variac, and I’m seeking assistance and advice on how to wire it correctly.The unit also has a label stating "Farnell No 393-1997," but I’ve been unable to find any manual or datasheet for it.I’m based in the UK, where the supply voltage is nominally 230V with a tolerance of -6% to +10% (216.2V to 253.0V). However, my supply is at the upper end of this range and has occasionally reached as high as 257V.I assume that the input supply will be across terminals 1 and 6, and the output will be between terminals 1 and 3.Input Neutral = Terminal 1Input Live = Terminal 6Output Neutral = Terminal 1Output Live = Terminal 3Thank you for your time and any guidance you can provide.Best regards.
RION NA-29E Trouble (What is it?) - Page 1
Forum section: electronics / repair

author: youngwug
author_rank: Contributor
timestamp: February 07, 2023, 11:22:47 pm
content: What is “1Z04 5A” in the picture? They are marked B and C on the board.Is it a Transistor?Datasheet not found.Any help would be appreciated.In addition, can you obtain a service manual?

author: fzabkar
author_rank: Super Contributor
timestamp: February 08, 2023, 12:20:55 am
content: RN1204, Toshiba, NPN digital transistor, 50V, 100mA, 300mW:https://docs.rs-online.com/fe1d/0900766b80c2a011.pdfhttps://www.google.com/search?q=rn1204&tbs=isz:m,itp:photo&tbm=isch

author: youngwug
author_rank: Contributor
timestamp: February 08, 2023, 12:41:56 am
content: fzabkar,Thank you very much.