hybridfree/eevblog-posts huggingface dataset:
LeCroy 7100 repair-won't turn on-"relay ?" clicking - Page 1
Forum section: electronics / repair

author: itkruglak
author_rank: Newbie
timestamp: January 10, 2024, 04:07:30 am
content: Hi, I just picked up a LeCroy 7100 in great shape--but not working. When ON button is pushed, I hear a relay clicking sound. It could be the HDD trying to initialize--or something else. It could be a PS problem-this is a complex beast and I would be grateful to anyone who has repaired this model scope and has suggestions.Thanks!Ivan

author: DaJMasta
author_rank: Super Contributor
timestamp: January 10, 2024, 07:48:01 am
content: Hard drives can click, but I wouldn't expect it immediately at power on. The unit I've heard an immediate, steady clicking noise like a relay had a bad power supply, and yes, it's both large and sandwiched in an inconvenient place.I'd recommend checking that cables are secure and whatnot first, then probably unplug some subassemblies and power it on to see if something is shorting it, but I believe it could be the startup procedure for the PSU not completing or the acquisition board reading a bad voltage and telling it to shut down through an external (of the PSU) shutdown line.

author: Alex_twn
author_rank: Contributor
timestamp: January 22, 2024, 03:52:08 pm
content: I recently acquired 3 Lecroy broken scopes (WR6100, WR6050, WP7000), I took my chance to "waste" ~500$ for the 3 but did not regret at all in the end.First I fixed the WR6100 few weeks ago with a similar symptom.With the main plugged you could hear a tic tic tic ... all the time and the problem was on the PSU.Luckily I was able to find the schematics for the PSU but I don't believe it is the same as the WR7100 one.The fault was on the primary, after the bridge rectifier, a switching transistor was not able to create the 15V needed due to 2 dry electrolytic capacitors with high ESR and 1 dead diode.A 2$ fix.The WR6050 was not starting the DSO application.After a quick check I found out that the Intel motherboard was having 3x 3300uF/6.3V very dry and opening up at the top.Another easy fix, with 3 new caps it started immediately and works perfectly like the WR6100.The WP7000 was supposed to be broken, but it already start to show some good sign of life.I will open it up and clean it so if I can help with the PSU let me know as it should be similar to your 7100.Those scopes seems robust and when a fault happens, not too difficult to fix.Considering the price I paid for the 3, I am quite happy with the deal !
LeCroy 8254M Waverunner won't power on - Page 1
Forum section: electronics / repair

author: sariniitb
author_rank: Newbie
timestamp: September 01, 2024, 06:42:45 am
content: Hi all,I have a LeCroy 8254M 2.5GHz oscilloscope that was initially intermittently reluctant to power up. Now it refuses to budge from the starting line... Manufacture date is September 2018, this scope was bought new and it's a workhorse in my lab.Symptoms: When power cable is plugged in, various internal relays are heard clicking. But pressing the power button doesn't cause any further action like fans spinning ON, bootup etc. This was happening intermittently earlier. Scope has always been kept in a cool, dry lab. Perhaps a little too cold (my lab is part of a cleanroom). One tech guy I spoke to, gave me a story that it could be: the temp sensor thinks it's cool enough already, so doesn't power up the fans, and the PC refuses to boot unless the fans are on. Sounds unlikely. Temp sensor would be on the parts that get hot - the lab only gets down to 22-24C.I have all the tools to take it apart and poke around inside. But short on time. Am tempted to, given the several other informative threads posted on this forum and the teardown on the sy2k site. But I'd like to check if its something trivial I am missing, and/or get a better picture of what to expect before I break the calibration seal to unscrew.
LeCroy 9354AL - still running but emerging capacitor issue? - Page 1
Forum section: electronics / repair

author: Lorenzo_1
author_rank: Regular Contributor
timestamp: July 18, 2021, 02:11:51 pm
content: My 9354AL was left sitting for quite some time. When I went to start it got no response for a few minutes apart from cooling fan trying to start up - kicking every few seconds but not rotating. It would eventually start up, fan would rotate and everything operating normally. Have since been using it every week and it's slowly but surely come good to the point that it now starts immediately and works AOK. Any suggestions as to what might cause this behaviour? Wondering whether a cap is going bad but has reformed itself with regular use? Don't want to pull the power supply down without good cause, but perhaps easier to catch the problem before it becomes performance.

author: TimFox
author_rank: Super Contributor
timestamp: July 18, 2021, 05:33:49 pm
content: Could that be a mechanical (e.g., bearing) in the fan itself? A stalled fan could pull down a power supply, but might revive after breaking through a sticky problem.

author: Lorenzo_1
author_rank: Regular Contributor
timestamp: July 19, 2021, 07:21:59 am
content: Sounds quite possible. Will have a look for a replacement - hopefully a bit quieter.
LeCroy 9400 Scope repair - reverse engineering the HVV200 input hybrid chip - Page 1
Forum section: electronics / repair

author: Gulftown
author_rank: Regular Contributor
timestamp: January 26, 2025, 04:54:08 pm
content: Hi,I've been trying to repair my old Lecroy 9400 for a while now and i am certain, that the problem lies within its input attenuator hybrid chip.There are no such chips as spares available anywhere and because i have nothing to loose here, i am trying to reverse engineer the chip.I made some high res pictures of the delidded chip and figured out most of the components.I still need to figure out some components and their pin-outs.Can someone maybe help me to figure out what those components are and what kind of transistors they are?I want to try to build my own chip replacement based on the results just for fun.And maybe someone else has the same problem. I will create a schematic on easyeda and share it.

author: Gulftown
author_rank: Regular Contributor
timestamp: January 26, 2025, 04:54:42 pm
content: My first handdrawn reverse engineering result as well as pinouts are attached.

author: Emo
author_rank: Regular Contributor
timestamp: January 26, 2025, 07:36:26 pm
content: Hi Gulftown,In the Lecroy Owners Group;https://groups.io/g/LeCroyOwnersGroupsomeone has reverse engineered the HHZ 406 an HHZ 606 module present in the 9420 and 9450. Though not fully identical, it might give you a head start in this engineering attemptEric

author: Gulftown
author_rank: Regular Contributor
timestamp: January 27, 2025, 08:55:24 pm
content: Hey Eric thanks for the info.I downloaded the files, but unfortunately the HZZ406 only seems to be a HiZ amp circuit.Maybe i can use the offset circuit from this design, but i still need to figure out how the other components work, which i cant identify.I will update you on my progress.
LeCroy 9424 frontend board supply problems, no signal on channels, only noise - Page 1
Forum section: electronics / repair

author: gabor.dani
author_rank: Contributor
timestamp: July 13, 2020, 11:15:55 am
content: I have a LeCroy 9424 scope. All 4 channels on the frontend board behave exactly the same, the same noise is present on all of them. No signal gets through. This led me to believe that they are not blown, but that there is a common problem somewhere on the board.So far:- I found a blown 5.1V Zener, CA13. Replaced it. It was shorted, both ways.- Measured all the voltages, they seem to be low.- Measured all the diodes in the circuit, none of them are shorted.- Main PSU rails are fine.- Inductors are fine.- Caps are not shorted.- Adjustment of TP4 does not have significant effect on the frontend board supply rails.- There is a considerable whining noise coming from the frontend board. I cannot determine the locatio of it, but if I disconnect the frontend, it stops.- A11 7805 is fine. Soldered out, measured output, 5V, soldered back in.- Relays click on this board.- If I disconnect the ADC-s from the frontend, there is a nice clean line, no noise at all. ADC tests pass.Where should I go from here? I am out of ideas.I measure 10.7 V on 12V rail, 5.6V on 6V rail. I cannot get them to the proper level (within the frontend board). These supply the custom analog attenuators and amplifiers.I am attaching:- Measurement taken on the board, with the schematics.- Screenshots of the cal failures. Basically everything looks blown, which leads me to believe that nothing is blown, but the problem is somewhere at some common place. Maybe low voltages?- For anyone who might need the firmware of the ROMs for this model, I read all out and also combined the high and low parts.

author: shakalnokturn
author_rank: Super Contributor
timestamp: July 13, 2020, 03:57:04 pm
content: I'd guess on an damaged IC drawing too much current between the +12V and -12V rails, with a little luck it isn't an ASIC, although the odds are that it all started with someone throwing too-much voltage at an input.The easiest way to locate it would be a thermal camera, you could go round poking your fingers if there is room though. Also have a quick look for blown "50ohm" input impedance resistors.

author: gabor.dani
author_rank: Contributor
timestamp: July 20, 2020, 08:56:17 pm
content: Problem solved.Threw out the +6V "F78G" regulator chip, it was blown. Bought a 7806, soldered in (pinout is different, be careful!), removed the auxiliary components that were part of the old variable supply (1 diode, 1 pot, 2 resistors).Done. Good as new.
Lecroy 9424 ROM latest version and images - Page 1
Forum section: electronics / repair

author: gabor.dani
author_rank: Contributor
timestamp: July 20, 2020, 08:53:17 pm
content: I have a LeCroy 9424 scope.The firmware version is 4.5. I was wondering of anyone has a newer version and willing to post here the bins of the 6 rom chips.There is no downloadable ROM in LeCroy-s site, only a Scope Explorer software, which supposed to connect to the scope via RS232, but it does not.

author: shakalnokturn
author_rank: Super Contributor
timestamp: July 21, 2020, 06:46:24 am
content: There should be at least some images around on groups.io.If I remember correctly though there is nothing more recent than the firmware you currently have.
Lecroy AP034 Oscilloscope Probe Repair - Page 1
Forum section: electronics / repair

author: ReedTriesToRepair
author_rank: Contributor
timestamp: December 02, 2023, 02:22:07 am
content: I'm getting an "overload" error on a Lecroy AP034 probe. This particular probe's history is unknown to me. At least it initializes in my scope. Does anyone happen to have a service manual for it? That may point to some of the potential causes of the error or schematics to help in diagnosis. I haven't really even been able to discern how to take the probe head apart without permanently damaging it, as it is completely encased in metal.I was able to find the operator's manual (attached) but the troubleshooting section of it was mostly in reference to operating misgivings, not issues with the probe itself.

author: alm
author_rank: Super Contributor
timestamp: December 02, 2023, 10:29:04 am
content: I can't remember having seen service information on any Lecroy active probe. Another place you could ask is theLecroy owners group on groups.io.My guess would be that the input FETs got destroyed by excessive voltage or ESD.
Lecroy DDA-3000 (Wavepro 7300) boots but blank screen - Page 1
Forum section: electronics / repair

author: dave_n_s
author_rank: Contributor
timestamp: September 03, 2023, 09:21:56 pm
content: After operating correctly, my DDA-3000 powered up by flashing an orange screen then apparently going through a normal boot to the expected configuration of lighted buttons, except that the screen was blank.I've power cycled with no change - each time a flash of something orange-ish on the screen then boot noises but no display on the screen.However the display is perfect if I plug a external monitor in.Immediately before the first bad power up I possibly hit the power button twice quickly, intending to switch off, but got the result described.As I can get at windows using the external monitor, I'd appreciate any advice on how to troubleshoot this. It's a superb o-scope.

author: dave_n_s
author_rank: Contributor
timestamp: September 03, 2023, 10:00:22 pm
content: More info.I did a restart from Windows with the external monitor connected.The scope screen displays the big Lecroy logo and the first Windows loading screen in parallel with the external monitor, then as soon as the external monitor says "loading personal settings" the scope screen goes blank and start-up to a perfect scope screen continues on the external monitor.So I or it have corrupted a setting for a second monitor that I can't find in the expected locations.Help!

author: RedCali
author_rank: Contributor
timestamp: September 04, 2023, 05:55:16 pm
content: Your WIN system may lost the regular screen settings - desktop right click screen settings - duplicate screen instead of extend.You can try aswell to run the recovery stored on the hidden partition.Some of the lecroy scopes screens are based on lvds interface, maybe some bios settings get lost - what's with the bios eprom backup batterie?
Lecroy HDO6104 not booting - Page 1
Forum section: electronics / repair

author: garciaargos
author_rank: Newbie
timestamp: January 15, 2025, 10:12:39 am
content: We have a Lecroy HDO6104 at work which was working fine, until a couple of days ago I got a "CMOS battery bad" message upon boot. It finished booting and then after powering off it wouldn't power back up.I've already replaced the battery and shorted the contacts for a few seconds, but nothing is happening.When I press the power button, LEDs light up and all 3 fans spin for a split second, then everything goes off. If I press, release and hold the power button, it stays on for a few seconds, but eventually turns off without showing anything on the screen.It seems there's no power to the USB, but there is power on the 12V rail of the motherboard, at least as long as it stays on. I guess some power rail is toast, but why?The motherboard looks a bit different from an older post about anHDO6034A.Does anybody know if there's a way to get a service manual or useful documentation to not debug this in the dark?

author: Dougmc
author_rank: Contributor
timestamp: January 15, 2025, 10:26:29 am
content: this group is dedicated to Lecroyhttps://groups.io/g/LeCroyOwnersGroup

author: garciaargos
author_rank: Newbie
timestamp: January 15, 2025, 12:29:31 pm
content: Thanks! Unfortunately I couldn't find anything there either. And more unfortunately the ko4bb website for the manuals is broken. Perhaps bad timing. Not sure the HDO 6000 series manuals are there though.

author: coromonadalix
author_rank: Super Contributor
timestamp: January 15, 2025, 01:41:47 pm
content: thread here ?https://www.eevblog.com/forum/testgear/lecroy-hdo6034a-wont-boot-anymore-fixed/

author: garciaargos
author_rank: Newbie
timestamp: January 16, 2025, 08:47:50 am
content: Quote from: coromonadalix on January 15, 2025, 01:41:47 pm"The motherboard looks a bit different from an older post about an HDO6034A." ;-)Saw that, didn't help :-(

author: zhongzuocheng520
author_rank: Contributor
timestamp: April 19, 2025, 01:33:34 am
content: The BIOS is compatible with your motherboard.

author: sprit
author_rank: Regular Contributor
timestamp: April 24, 2025, 11:18:52 am
content: hi garciaargosI'm not sure if this will help you but if it were me I would try to isolate the thing I feel most suspicious about from the mess. Take the motherboard out and do the power on again. If it doesn't work, check the vrm area for shorting, check and replace if there is a fault there.RegardsFeng

author: wwilliams31
author_rank: Newbie
timestamp: July 06, 2025, 10:19:27 pm
content: Hi garciarhos,I have the same model scope and am experiencing the exact same problem. Have you had any success finding a solution? Replacing the CMOS battery did not help.
LeCroy LC684DXL oscilloscope -- PS9611 power supply repair notes/questions - Page 1
Forum section: electronics / repair

author: hasc
author_rank: Newbie
timestamp: February 15, 2020, 07:28:52 am
content: I have owned the scope for several years and was using it regularly until it made a dull pop while powering on, then completely dead. Schematics are available in the service manual on the KO4BB site and I am attaching a screen shot of the relevant section. I did not find a part list in the service manual but U3 is UC3845, U4 is LT1249, U5 is TC429CPA, Q4/Q5 are STW20NB50, and CR19 is STTA1206D.Parts I initially found bad were Q4 and Q5 (main PFC switching transistors -- one had bits of the package blown off), CR19 (main PFC rectifier -- shorted), R72 and R60 (gate resistor and gate driver power filter -- both visibly toasted), and the gate driver U5 (some pins shorted to supply rails). After replacing those parts the supply attempted to start but both the line input filter module and supply made some unhappy noises and the inline 15 A breaker/GFCI I was using quickly tripped. With one side of F2 between the PFC and primary side of the transformer lifted the behavior was the same. I was worried about causing further damage so I switched to powering it from a lab supply with voltage set just above the startup threshold, approximately 130 V, and gradually increasing the current limit I was eventually able to observe the PFC output +VDC going above the 375 V setpoint. (The highest I saw was over the 450 V rating of C94 before quickly shutting it off.) The overvoltage was due to one of R85/R54 (249 k each) being open, breaking the PFC voltage feedback loop, and with them replaced the scope is working again and has survived a few dozen power cycles and several hours of operation. I also replaced C94 as a precaution even though it seemed fine since it had been driven above rated voltage several times.Two observations: The TVS device Z1 shown in parallel with C94 on the schematic was not actually installed and no evidence of removal -- looks like it was omitted when the board was originally assembled. Also, the series pair R85/R54 that had failed open was apparently a modification from the original board layout which has only a single footprint, R54. The modification to two series resistors looked professional, probably done originally when the board was assembled, but maybe evidence that there had been some concern about the voltage/power rating?Some questions:The coupled inductors L13 are on a large toroid with turns ratio I estimated at roughly 10:1 left:right so it seems like the left side of L13, Q4/Q5, and CR19 should function basically like a standard boost converter, but what exactly is the purpose of the right side of L13, CR20, CR21, and C95? Is there a name for that topology?Does the failure chain R85/R54 open -> +VDC overvoltage -> CR19 reverse breakdown and fail shorted -> remaining damage caused by C94 discharging through Q4/Q5 make sense?The original Q4/Q5 and CR19 parts appeared to be not readily available so I replaced STW20NB50 with NTHL095N65S3HF and STTA1206D with IDH20G65C6XKSA1, do those substitutions look reasonable?
Lecroy service manual for SDA6020 or Wavemaster 8600? - Page 1
Forum section: electronics / repair

author: JohnG
author_rank: Frequent Contributor
timestamp: May 02, 2019, 07:44:48 pm
content: Folks,Like the subject says, I am looking for a service manual for a Lecroy SDA 6020 or Wavemaster 8600, or anything close. Any leads appreciated, and yes, I have searched as many of the manual archives as I know...Cheers,John

author: speclab
author_rank: Newbie
timestamp: April 26, 2024, 04:41:15 pm
content: I'm in need of the Wavemaster 8600 service manual also.

author: djsb
author_rank: Super Contributor
timestamp: April 26, 2024, 05:24:54 pm
content: A service manual for a Wavemaster 8300A would be nice as well. I have posted here about trying to fix one.
LeCroy WaveJet 314 oscilloscope - Page 1
Forum section: electronics / repair

author: Brian Walsh
author_rank: Newbie
timestamp: December 17, 2024, 04:29:15 pm
content: Can anyone tell me where to find schematics. LeCroy won't help. Scope won't turn on. I reckon it's power supply from front panel switch upwards. This is a very complicated instrument. No chance without drawings. TIA.
Lecroy Wavemaster 8300A-System recovery key USB. - Page 1
Forum section: electronics / repair

author: djsb
author_rank: Super Contributor
timestamp: July 10, 2020, 09:43:56 am
content: I've just discovered an old Lecroy Wavemaster 8300A scope at work. The unit powers on but there is NOTHING on the TFT display (NO bootup text,logo or anything accept lines across the screen and then some funky colours). There is a Windows XP logo that appears on an external monitor and then that goes blank as well. I'm going to try to restore the system usingthese instructions before I do anything else.http://cdn.teledynelecroy.com/files/manuals/scope_system_recovery_instructions.pdf#%5B%7B%22num%22%3A9%2C%22gen%22%3A0%7D%2C%7B%22name%22%3A%22XYZ%22%7D%2C43.5%2C748.5%2C0%5DThe scope has XP Pro installed. Just wondering if anyone has done the same and if so can offer any tips or additional documentation. Thanks.

author: Jwalling
author_rank: Unknown
timestamp: July 10, 2020, 10:35:04 am
content: If the graphics is Intel based, <CTRL><ALT><F1> should be the keyboard hotkey to switch over to the VGA output.I would beverycareful running a recovery, you don't want to lose the factory calibration which is stored on the hard drive!

author: Mechatrommer
author_rank: Super Contributor
timestamp: July 10, 2020, 10:57:41 am
content: my SDA6000 (WM8600) was unused for about a year, when i turned it on screen is blank with some funky colors (random dots of colors on black background), the fix is turn it off for a while, turn on then its ok again i suspect there are some cold joints on the board. when regularly used within few days, it seems the random colors is gone for now... i agree the first thing you have to do is stripped away the HDD to another PC and try to recover inside there as much as you can first. those PATA HDD is dying... fwiw.
Lecroy Wavepro 715-zi Channel-specific noise and issues - Page 1
Forum section: electronics / repair

author: gabeak2
author_rank: Newbie
timestamp: December 21, 2024, 07:34:47 pm
content: I got this used LeCroy Wavepro 715-zi oscilloscope, and was told that it had been fully functional recently. However when I got it, I see the following:-Periodic noise that goes off-scale (at any scale, and any input coupling) on channels 1 and 2, at around 10MHz-Nothing on channels 3 and 4The technician I got it from said that he had run into this in the past and the LeCroy support person pointed him at some routine he was able to run and fix it. He doesn't remember what the routine was and despite lots of looking I can't find it. Calibrating does nothing. I had thought something might be wrong with the relays in the AFE or something, as this kind of noise seems like it would swamp out basically everything else. Has anyone seen this before? Any guesses what the problem might be?Thanks,Gabe
LeCroy WavePro 760Zi Not Working - Any Repair Shop in Canada? - Page 1
Forum section: electronics / repair

author: can900
author_rank: Newbie
timestamp: September 29, 2025, 04:20:39 pm
content: Hi,I have LeCroy WavePro 760Zi oscilloscope that has stopped working. I am looking to get it repaired preferably, locally in Vancouver, Canada. Can anybody recommend any test equipment repair shop? or Should I contact LeCroy directly?It looks like the power supply has gone bad. Nothing happens after pressing the power button.Thanks!

author: tooki
author_rank: Super Contributor
timestamp: September 29, 2025, 04:35:28 pm
content: Quote from: can900 on September 29, 2025, 04:20:39 pmYep. At work nearly all of our LeCroys have had PSU failures. A colleague is the one who’s fixed them, I think it’s the 5V standby rail’s caps that go bad.LeCroy itself will just install a replacement power supply for 2 grand, but it’ll fail the same way in a few years, because they used cheap caps. I’d recommend DIYing it.

author: can900
author_rank: Newbie
timestamp: September 30, 2025, 11:43:54 pm
content: I see. Looks like the whole thing has to be taken apart to access the power supply. That's why I was bit hesitant.

author: tooki
author_rank: Super Contributor
timestamp: October 01, 2025, 01:40:32 pm
content: Quote from: can900 on September 30, 2025, 11:43:54 pmYep, disassembly is a pain in the ass. But given the outrageous cost for a replacement power supply from LeCroy, it’s worth the effort!

author: erkko
author_rank: Contributor
timestamp: October 01, 2025, 02:08:40 pm
content: Not even mentioning what this scope itself costs... Such a mad prices and they dare to use crappy caps and then not own up to it and fix it for free, even out of warranty, they charge customer for psu with very same crappy caps in it. Just wow.

author: tooki
author_rank: Super Contributor
timestamp: October 04, 2025, 02:45:38 pm
content: Quote from: erkko on October 01, 2025, 02:08:40 pmYep. I have said this to our LeCroy rep (at work): at those prices, I expect nothing but the very best components, period. And that this issue has definitely played into purchasing decisions and will continue to.
Lecroy WAVEPRO 7K (7300A) Calibration problem - Page 1
Forum section: electronics / repair

author: AmitTk
author_rank: Newbie
timestamp: July 15, 2023, 02:00:30 pm
content: Hi all!I got my hands on a Lecroy 7300A oscilloscope.When you turn it on, it loads, starts, but for about 5 minutes the "Calibration" slider hangs. When switching modes, the relay clicks, the inscription "Calibration" lights up again and again you have to wait about 5 minutes. Calibration files are not written to disk. Tried to rearrange Windows, replace the disk. Didn't find any changes.

author: DaJMasta
author_rank: Super Contributor
timestamp: July 15, 2023, 11:17:25 pm
content: The calibration that it does on warm up and intermittently in use is just temperature/offset compensation, not really a full calibration and not ever written to the disk, to my knowledge, as it's temporary until the next one. There are also lasting calibrations that can be rerun through the service menu, but I'd suspect that there's likely a problem that would prevent them from completing successfully.Are there any error messages on startup of XStream? Are there any devices in the windows device manager that show as question marks? Do you actually see any trace at all? Does this mini-cal complete for some channels but not all? You should be able to configure it to calibrate less often and safe the instrument state for the next restart of the software (maybe both are in the Utilities tab?), and between those you should at least be able to figure out if some channels will work as intended (it will also force a calibration when switching to 20GS/s on two channels, so disabling two and setting it to use maximum sample rate should force one of these mini recals).

author: AmitTk
author_rank: Newbie
timestamp: July 16, 2023, 06:34:13 pm
content: Thanks for the answer!Unfortunately, I do not know how to enter the service menu. The oscilloscope requires a password, which I don't know.1. There are no error messages. The booting is working fine.2. Everything is fine in the device manager. I reinstalled Windowsand XStream, There were no changes.3. I created the D:\Calibration folder with my hands and transferred the data from the folder there XStream - there was no difference.4. The inscription calibration in the lower right corner hangs for 5 minutes, after which the oscilloscope starts working normally. But if I switch ranges - again calibration starts for 5 minutes.5. In the Utilities, I do not see the settings for calibration, only a checkmark to enable automatic calibration, which has no effect.6. This behavior is observed with any number of enabled channels.7. No channel settings, number of samples, etc. behavior is not affected.

author: DaJMasta
author_rank: Super Contributor
timestamp: July 17, 2023, 06:26:28 am
content: 9472 is the code. Most of the functions are specific to later versions, but the Aladdin board options and the recal is available there.There's a pretty lengthy WavePro 7k discussion in the Test Equipment forum with a bunch of tools, analysis, and problem solving. Worth a look.
Lecroy WaveRunner (M)Xi-A encoders - Page 1
Forum section: electronics / repair

author: darkstar49
author_rank: Frequent Contributor
timestamp: August 11, 2020, 09:23:40 am
content: Just for the info to remain somewhere, as I'm just in the process of fixing some broken knobs/shafts on a LeCroy WaveRunner MXi-A, here are the parts numbers...There are 2 types of encoders, with or without (push)switch, all types are from ALPS, have a size of 12mm (i.e. PCB footprint), and an overall length/height (referred to by ALPS as 'shaft length', but that's wrong to me...) of 20mm, and 24 detentsEC12E24404A8 -> without switch, light jog (the default from Lecroy)EC12E24204A8 -> without switch, standard jog (just a bit 'harder' to turn), but can be used as wellEC12E2444400 -> with switch, light jog (the default from Lecroy, but no longer orderable, at least I don't find any...)EC12E2424407 -> with switch, standard jogAs for the knobs (the black ones)... don't ask... I don't know !!! ;-)For now, Lecroy is relatively kind to give/sell some when needed (although I'm not too sure this goes well for everyone...)For the older scope types (Xi, Xs & Co), LeCroy no longer has those, I believe they collect some when they have dead units passing by, so they may occasionally be able to help while servicing a scope, but you won't get any spares from LeCroy directly.
LeCroy Waverunner 104 Xi-A  - Page 1
Forum section: electronics / repair

author: Concorde63
author_rank: Newbie
timestamp: March 22, 2021, 12:35:34 pm
content: Hello everybody,I'm new to the forum, and I hope the post is in the right board.I've got a problem with a LeCroy 104 Xi-A scope that I haven't used in a bit of time. When I power on the unit, the screen lights up but the LeCroy simbol doesn't appear and, in addition to this, the fan of the cooling system doesn't slow down as it used to do and the device remains in this state until I manually plug off the power.After reading a bunch of posts on this forum I've take apart the scope and changed the 3V cr2032 battery which is on the motherboard, because the problems described seemed to me quite similar to the ones I have, but unfortunately the problems aren't gone.Thank you in advance for your suggestions.

author: RedCali
author_rank: Contributor
timestamp: April 24, 2021, 04:39:18 pm
content: hia little late - did you fix it?I had a similar behavior after doing some upgrade on my WS424.I changed the battery for the bios as well and afterwards it want boot up....What i did is - during startup i step into bios and Reload the default bios settings, that solved the problem on my WS424 :-)As is a Windows based Scope - it has a BIOS like a regular computer - so the beeps the bios does during start up can lead you towards the issue and give some idea abut the problem.BRRedCaliYou can ask an the LeCroy group as well:https://groups.io/g/LeCroyOwnersGroup

author: ddrl46
author_rank: Regular Contributor
timestamp: April 24, 2021, 05:40:05 pm
content: My 44Xi-A did the exact same thing and it turned out to be a dead stick of RAM on the motherboard. My scope would also sometimes give POST error beeps when starting, but not always.
Lecroy Waverunner 104MXi PSU repair - Page 1
Forum section: electronics / repair

author: Kurets
author_rank: Regular Contributor
timestamp: September 28, 2024, 07:05:38 am
content: Since a few years I have a Waverunner 104MXi which i upgraded with a faster processor, more RAM, and SSD when I got it. It has been reliable up to now when I found that it sometimes would give the "No hardware detected" error. The error would clear if I removed the power plug for a few minutes, indicating that it was a power issue.After having left it unplugged for a few days, yesterday I plugged it in to find that the 5V standby supply is making a whining noise and the scope won't start. So, time to dig into the PSU to replace dried out electrolytics!I know there are people with more experience disassembling these scopes and have a question. When getting to the point of remving the acquisition board, the connector panel is semi-loose but plugged into connectors on the acquisition board. The first time I took the scope apart, I left the connector board attached but this was very wobbly and seemed like it would damage the connector. My question:how do I disconnect the connector board from the acquisition board?It seems like just plugged edge connectors, but I feel no give when pulling so I am worried that I am missing something.

author: Kurets
author_rank: Regular Contributor
timestamp: September 28, 2024, 07:38:19 am
content: Remembering this thread:https://www.eevblog.com/forum/testgear/teledyne-lecroy-waverunner-64xi/Maybe there is no need to risk disconnecting the connector board (frontend board)?

author: analogRF
author_rank: Super Contributor
timestamp: November 27, 2024, 06:10:36 pm
content: there is no need to disconnet the FE board. the whole thing comes out but be gentle.however the problem I am having is how to power up the PSU when disconnected from the ACQ board?I thought the regular grounding the green wire (PS_ON) on th ATX connector on the mobo turns it on but no.some sort of other control signal is needed to power on this PSU and I cannot figure it out it seems
LeCroy WaveRunner 6030 stuck at auto calibration - Page 1
Forum section: electronics / repair

author: Kampfkuchen
author_rank: Newbie
timestamp: May 22, 2025, 11:04:44 am
content: Hello everyone,I got a WaveRunner 6030 without any information. HDD was broken, I changed the PCBA and the HDD was working again, but doesn't had any data on it from LeCroy.So I reinstalled Windows XP with the LeCroy Software and it recognizes the PCI Card and acquisitionboard. But here was the first strange stuff. XStream software shows a WaveRunner 6050A - the PN 902602-00 is listed as a 500MHz 5GS/s acquisition board. So anyway, I can live with thatBut there is something wrong with the board. It stucks on the "calibration...", everything slows down and there is never a trace on the screen. The channel says "no data available".If I turn off "hopping" and "digitizer delay" in the service menu as shown in the screenshot, it works. I can see traces and the signal seems relatively accurate.I'm a bit overwhelmed where to start the route. I have the service manual and most of the schematics, but I'm new to the hardware of oscilloscopes.Does anybody has an idea what to test or where I should have a look? I'm not sure what "hopping" mean.Best regardsPS: the screenshot shows a rectangle with 10MHz from my Toellner function generator - not a clipped sinus (just mentioning)

author: Kampfkuchen
author_rank: Newbie
timestamp: May 22, 2025, 10:14:35 pm
content: I fixed it. It was a bit solder on some resistors on the input of one of the voltage regulators. It has the supply for the delay calibration and these ICs where dead.Now after removing the solder everything works as expected!
Lecroy Waverunner 6030a HD re-install issue - Page 1
Forum section: electronics / repair

author: kimwu
author_rank: Newbie
timestamp: September 09, 2022, 12:35:36 pm
content: Lecroy Waverunner 6030a HD re-install issueunfortunately my scope system crashwhen i re-install i find have one unknow deviceafter check it's need drive for lecroyhave any one can help provide driveror where can down load it

author: kimwu
author_rank: Newbie
timestamp: September 11, 2022, 08:56:42 am
content: after few day try find in eeblog and LeCroyOwnersGroup@groups.iohttps://groups.io/g/LeCroyOwnersGroupfind need to install old version programxstreamdsoinstaller_6.5.0.5and Semtec touch screen calibrator to calibration screennow i have Lecroy Waverunner 6030a working now

author: spicytofu
author_rank: Contributor
timestamp: October 08, 2022, 12:45:07 am
content: Quote from: kimwu on September 11, 2022, 08:56:42 amI am trying to find this version everywhere. Lecroy is not allowing public download of their software now and I cannot register. Where did you get it, or maybe can you share it?

author: Nx-1997
author_rank: Regular Contributor
timestamp: October 09, 2022, 11:22:48 pm
content: See if any of these will work for you.https://mega.nz/folder/5jg22JJb#7cplMn1LXDB32bB51h-Qpg

author: spicytofu
author_rank: Contributor
timestamp: October 11, 2022, 01:26:31 pm
content: Quote from: Nx-1997 on October 09, 2022, 11:22:48 pmWow thanks. Dont ever take this down. I bet there are many of us trying to get our hands on older firmwares and LeCroy is becoming a PITA to deal with.
Lecroy WaveRunner 6050 Error - Page 1
Forum section: electronics / repair

author: sprit
author_rank: Regular Contributor
timestamp: May 13, 2025, 08:58:36 am
content: Hello everyone, I have a Lecroy WaveRunner 6050. It has a strange error. The old MB was broken so I replaced it with another MB. After reinstalling the operating system and software, when starting the scope suddenly became the WaveRunner 6030 version instead of the 6050. All buttons and functions are disabled. There is no trace on the screen. I cannot use the buttons on the front. Can anyone help me? Thank you very much.SincerelyFeng
Lecroy WaveRunner 625ZI fail to boot，Black screen！ - Page 1
Forum section: electronics / repair

author: Yike
author_rank: Contributor
timestamp: January 04, 2022, 02:48:28 am
content: Hi everyone, New owner of this unit. I want to ask experienced people for advice in solving my problem.I have a LeCroy 625zi. I plan to reinstall the system and find that there is a password. Therefore, I remove the BIOS battery. After installing it back, I can't start it again. The DOS interface is not displayed, and only the fan is working.I can confirm that the power supply is OK！and all output voltages are qualified！ How can I repair it?

author: SparkyBruce
author_rank: Contributor
timestamp: January 04, 2022, 07:34:51 am
content: Hello ,have you tried plugging in an external monitor as sometimes they default to external screen only when the battery is removed?ThanksBruce

author: Yike
author_rank: Contributor
timestamp: January 04, 2022, 08:02:51 am
content: Thank you for your advice！

author: Yike
author_rank: Contributor
timestamp: January 04, 2022, 09:11:04 am
content: The problem now is that when I start up, nothing is displayed on the screen, but the speed of all fans reaches the maximum. This phenomenon is the same as when I try to take down the EEPROM on the acquisition board and start up again.
Lecroy WaveRunner HRO 66zi - Page 1
Forum section: electronics / repair

author: figgie
author_rank: Contributor
timestamp: June 09, 2023, 10:23:46 pm
content: Greetings everyone!I have been a member for a bit but was always lurking as i was researching. In my quest for oscope ownership, I always wanted a tektronix (as i knew them to be made in the USA but time has changed) but then upon stumbling on this forum....i was quickly dissuaded from tektronix and started searching for something else.Fast forward through now, looking through the bay, saw someone was selling a Lecroy WR66zi HRO but it was in operative.Bought it for less than what was asked. Sure enough when I received it, it was booting up but acting sporadically with failed channels. Then it started blinking out.So took it apart, replaced the RTCS battery just in case (old one read 3v on my multimeter) and I started reseating all connections.Found the SATA connection not plugged in all the way. Also the connector that looks like a SAS connection that goes to the channels was also not fully seated...Looked at the HDD size and it was 160GB...I had a 500GB hdd laying around from a laptop that died from the battery.Used Acronis to clone the 160gb => 500gb drive.Moved the HDD from SATA 2 to SATA 1, for some reason the OEM HDD was plugged in to SATA 2...Booted from the 500gb driveNow the DSO portion comes up with no errors! Yay!Next, probe purchase!Truth be told, I got lucky but only when i can actually test will i know if it is working ok... wish me luck

author: Aheld
author_rank: Regular Contributor
timestamp: June 10, 2023, 08:55:44 am
content: Congrats,Important to mention is also, update firmware to latest version. There was a time where LeCroy had a lot of trouble with firmware updates. Too many different mainboards in same device family. In my company we had a lot of trouble with this topic.After solving this issues by LeCroy and accepting the different philosophy of the GUI of LeCroy scopes related to Tek, these are very good devices. I like it.Br.Axel
Lecroy WaveRunner Xi mobo ?? - Page 1
Forum section: electronics / repair

author: darkstar49
author_rank: Frequent Contributor
timestamp: January 08, 2018, 06:24:57 pm
content: Hi,just got a dead WaveRunner 104MXi... mobo looks dead, although I still need to test the PSU, too...Nevertheless, the Lecroy engineers have chosen (just like for a bunch of other models with the same form factor) to use a motherboard with a PC/104+ connector instead of a 'standard' PCI connector... this makes it damn difficult, not to say impossible, to find a suitable replacement motherboard (not even talking about the L-Bus connector, but that's another story...)Long story short, does anybody know a (relatively) recent mobo with a PC/104+ connector in Mini-ITX format, or has anyone ever played with PCI (-express or not) to PC/104+ adapters ?? Any hints/feedback more than welcome !

author: ollopa
author_rank: Regular Contributor
timestamp: January 13, 2018, 10:13:16 pm
content: Can't answer your question but is this an eBay score?Would love to see pictures of the guts if you have time to take them.

author: pilotchup
author_rank: Unknown
timestamp: September 02, 2018, 08:10:57 am
content: Hi Darkstar,Any luck with your situation? I am very curious, and about to pick up a 64Xi myself.Thanks!

author: CzokNorris
author_rank: Contributor
timestamp: June 26, 2021, 06:03:31 pm
content: Any progress on this? What was the result?
LeCroy WaveSurfer 10 - Page 1
Forum section: electronics / repair

author: Teichhermelin
author_rank: Regular Contributor
timestamp: January 06, 2024, 09:45:34 am
content: Can you find the error yourself? Or is this just a service at Lecroy?The 4th channel no longer displays the calibration signal correctly.

author: shakalnokturn
author_rank: Super Contributor
timestamp: January 07, 2024, 03:40:01 am
content: There's apparently a small value of capacitive coupling letting the fast transitions appear.Estimating the capacitance may give you a few hints for troubleshooting.It could be a broken connection at the BNC, defective relay, or fault somewhere in the low frequency path in the front-end.Even without schematic comparative probing should get you to the problem easily, the main issue is how to run it disassembled while keeping things cool.

author: boB
author_rank: Frequent Contributor
timestamp: January 07, 2024, 04:28:06 am
content: Have you tried swapping probes on channel 4 ?

author: Teichhermelin
author_rank: Regular Contributor
timestamp: January 07, 2024, 08:53:08 am
content: I did that.

author: Teichhermelin
author_rank: Regular Contributor
timestamp: January 07, 2024, 08:53:48 am
content: When I have a lot of time I'll take a look at it! First of all, thank you for the information!
LeCroy Wavesurfer 44XS-A boot up problems - Page 1
Forum section: electronics / repair

author: dominitech
author_rank: Contributor
timestamp: May 17, 2020, 12:50:20 am
content: I have a Wavesurfer 44XS-A that just went black screen on me all of a sudden. It is 12 years old so I figure it is a dead 3v CR2032 battery. I take it apart and indeed the battery is bad. I swap it for a brand new one it still does not boot up. Then I try to clear the CMOS by moving the jumper over to the CLR(for several minutes) and move it back but the best I get is a LeCroy splash screen where it just hangs. I have tried several combination of things already and I have taken it apart so many times I can take it apart the unit rather quickly. Not sure what else to try. Does anyone have any clues on the specific procedure to get this to boot up after changing the CMOS battery?
Lecroy WS 400 trips GFCI (RCD) when plugged in (not turned on) - Page 1
Forum section: electronics / repair

author: perdrix
author_rank: Frequent Contributor
timestamp: January 01, 2022, 03:32:30 am
content: When I last put this WS 434 back together, it blew the RCD the moment I plugged in the mains cable.If I disconnect the power supply from the PFC board it doesn't trip the RCD.Any ideas what the problem might be. Low voltage ohms checks show open circuit between live and earth, neutral and earth.ThanksDavid

author: bob91343
author_rank: Super Contributor
timestamp: January 01, 2022, 05:02:06 am
content: You need to inspect the primary wiring. There is obviously a short.
LeCroy WS434 help - Page 1
Forum section: electronics / repair

author: aqibi2000
author_rank: Regular Contributor
timestamp: July 25, 2021, 08:20:38 am
content: Hi,New owner of this unit. It appears to be running the wrong firmware? All dials workI need help to upgrade the firmware (I own eeprom/spi programmers) and wish to enable UART/I2C/CAN/SPI Decoding triggers.Serial number of the unit is correctly configured in the windows computer nameMost appreciated

author: aqibi2000
author_rank: Regular Contributor
timestamp: August 27, 2021, 10:13:02 pm
content: Bump bump

author: amc184
author_rank: Regular Contributor
timestamp: August 29, 2021, 12:52:20 am
content: I've also got a LeCroy Wave Surfer 434, but I don't believe there are any serial bus decoding options for these. Even if there are, they'd be paid licences.One thing that might be worth trying is Sigrok, an open source logic analyser platform. This seems to be able to take input from LeCroy oscilloscopes using the X-Stream platform (including the Wave Surfer 400 series). See here:https://sigrok.org/wiki/LeCroy_oscilloscope_seriesI've been meaning to try that, but haven't got to it yet.

author: aqibi2000
author_rank: Regular Contributor
timestamp: August 29, 2021, 08:48:23 am
content: I believe my issue is worse the fact that the wrong software is installed please see the photo.Of which I don’t know which is the correct one to put on nor know how.The 4 waveforms are default shown and the oscilloscope does not take an input… decoding was the next stepBut thanks for the suggestion

author: pcwrangler
author_rank: Regular Contributor
timestamp: August 30, 2021, 12:27:26 am
content: That looks like some sort of display mode or showcase mode. Have you read the manual? If all else fails try the "System Recovery" procedure in the manual. I think F4 on a keyboard.
LED back-lit monitor issue; brightness traces at right side of white/bright pxls - Page 1
Forum section: electronics / repair

author: marhuum
author_rank: Contributor
timestamp: October 17, 2024, 12:38:53 am
content: Anyone have fixed or just gone through a LED back-lit monitor fault having brightness traces at the right side of white or very bright turned-on pixels ?Know nothing even on its termSo googlings led me to tell that it's LED screen "bleeding", is it right?How do electrician experts handle it to fix or mitigate this problemE.g. This’s “Info section”of EMACS, Vim or alike text editor, on a terminal/console which has white bar/strip, upon desktop black BG.It’s up to the terminal right border which must be gone there.But a trailing faded white bar can still be seen at right side