I REMOTE CONTROL MANUAL g g. II. II. II. | g. II g. II g. I li g a. Serial Number. May MODELS /14/20/24/30/ DUAL- AND QUAD-CHANNEL. 5 Manual Operation. Vertical Controls. Time-Base Controls. Probes. Bandwidth Limit. Trigger controls (Standard). Displaying Traces. Display Control and. See Remote Control Manual. 6FRSH ([SORUHU. Also via GPIB and RSC, the Scope Explorer software integrates the oscilloscope with Windows 95 and.

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You could check the internal clocks signal. I wish for you that the adc hybrids and other hybrids aren’t broke. Check all the component power supply and check for leaking cap. I recently bought this LeCroy So I just need to get it working. Haven’t managed to get a service manual yet, but I got an operating manual which was close enough for me to work out how to use it, if it wasn’t faulty anyway. And I did a full reset already to make sure that wasn’t the issue. No visible damage inside or out, all looks in good condition.

It won’t trigger, but I think that’s a side effect more than the fault itself. Feeding a test signal into all four channels, none of them show even a trace. Doing the same for Channels gives the readings as 76mV and 80mV.

I’ve checked the voltages from the PSU not under load and they are all correct. What’s my next step? If you did not let me know. The manual should be close enough to get you started as it is for the dual trace version. I have never worked on one of these except for the power supply so other than the GAL options I can not personally help you except for items in the service manual.

Make sure that the GPIB board is properly connected as I remember something about the something not working if there is a problem there but I am not totally clear on that at the moment you will just have to plow through the service manual and figure it out.

I would start mannual the timebase board. Also try all trigger options, Auto, Line, Etc. Check oscillators and other timing things. Look for loose boards or chips not firmly seated in sockets.

I have fixed weird problems in instruments of this lectoy just by reseating chips in their sockets. TI TTL chips that have silver plated leads can have this problem. However do not clean any connector pins with an eraser. Usually just removing and reseating cards a few oecroy will reduce any oxidation. I would take several digital hih res pictures of everything you plan to mess with in case a cable pops off and you are not sure how things go.

I also do this for every board you plan to work on. It is easy to get confused where things go when you have a bunch of chips removed from their sockets! There is a fellow on the site I think Jeff Cox is his name that knows a lot more about these scopes than I do.


Also Manuual Massengale another group member.

Teledyne LeCroy – Product Manuals – Oscilloscopes

Perhaps they will chime in. Also look for bad caps the axial blue electrolytics. They may not be the problem but at some point they will be. You should have gotten a message when you joined the group telling you where to find manuals, etc.

I did, thanks, but I wasn’t sure which was the closest service manual to my scope. Thanks very much for your other suggestions, I’ll definitely try those out. I wasn’t expecting anyone to know the answer, or this to be easy, but I thought Manua post just in case someone has come across this issue before and save me a fair few weeks prodding around. Or at least steer me in the general direction of good places to prod first, which you have I’ve checked the voltages from the PSU not under load and they areall correct.

If you do a maximum manusl voltage zoom-in on the flat traces do you see anything looking like a random square wave? That’s a good thought! Strangely, Channel 1 has now gone back to 80mV. If I knew how to alter that I’d mankal if I’d done it. I know I said there was no visible damage, but I started to look at what might affect all channels, and decided to start lecry the BNCs and work my way back, following the signal on my other scope as I went. Didn’t even get as far as putting the other scope on anything, because I saw what is unmistakenly something that has gone phhhhffuuut!

Or am I manuql and its a resistor? On the other side of the board, which is where those three groups of components the blown one and the two similar groups above and below it are three voltage regulators. So I guess it might be that the middle VR has gone, which could be what caused the cap to go? Or am I reasoning badly here. Normally I’d just think, whack a meter on it, but how near all that is to the tube makes me nervous.

From the pic I’d guess the bead is gone? I was trying to look for something that looked a bit lecrroy the bottom circuit board, didn’t think to look at the schematics first.

I think it’s the cap that’s gone, the black manuak SMD components I think are the inductors. They have zero DC resistance and appear to be connected as far as I can tell, if there is another short somewhere I could be wrong to the 15V and V lines on the PSU. Looking at your photo, I’d say it’s a fixed voltage negative regulator, the blown component would be leceoy capacitor on the input side probably just decided to explode for no reason Checked the VR and it’s correctly giving out V it’s getting V in as wellso I figure that cap has gone and is just shorting it to ground, but lefroy PSU is unmoved by the whole affair.

My fingers are crossed that this cap went bad and it’s the only damage.

Full text of “LeCroy Service Manual”

As you say the VR would probably protect everything beyond it from serious damage, and the cap is the PSU side of it. Manuap so far the PSU doesn’t mind. So I need to save up all my spare pennies and buy myself a very expensive SM2. Before I risk ebay, does anyone have a recommendation for a quality replacement in the UK?


There’s one heading to you by email with the complements of Teledyne LeCroy. If for some reason you don’t get it, please post here again. Cheers, Gil toggle quoted message. I don’t represent LeCroy, lecrou I do work for the Company. Cheers, Gil Wow that was very kind of you!

I woke up to a nice email this morning UK time from Sabrina with a zip file inside. I’m a very happy bunny now. I may be less happy when I fix the blown cap and it’s still broken, but I’ll still be quite happy. I get a error Forbidden when I click on those links, yet it would seem nobody else is having a problem I 4910 know that Teledyne acquired Lecroy!

This forces me to as a favor of you, Gil. I’ve been trying to source a Teledyne attenuating relay for a repair on a Agilent A scope. It is lecrot A It appears to have been custom made for Agilent as it is not a standard A lecrog part.

LeCroy 9410 Manuals

Is there any chance you might be able to procure the specs? I know it’s a long shot and you might not even be in that division Are there any signs the SMPS may have been changed on your ? Even if the cap blew with present SMPS, there is a chance of damage caused on V supplied lecrky due to a voltage spike when cap went from short to open circuit. If fault persists check for overheating components especially those with the least tolerance on V supply, also some components are easily damaged when receiving inputs nanual power supply.

I am in french country. Yes Jay I have same problem of error. Oops, I think I was blocking referrers, should be okay now. Okay, so I’ve now noticed the manual they sent me was for theexactly the same one in the archive linked from here! Well when I say the same, it’s split into chapters and rotated 90 degrees.

So it’s actually not as good. This cannot be undone. The Group moderators are responsible for maintaining their community and can address these issues.

Your email is included with the abuse report. Search Only Within This Topic. Probably download the service mmanual and begin to check everythink. I’ve made much quicker progress with your help than I would have alone. Hi – that’s embarrassing. Are you sure you wish to delete this message from the message archives of LeCroyOwnersGroup groups.

Reason Report to Moderators I think this message isn’t appropriate mamual our Group. The new topic will begin with this message. Subject of the new topic: