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Upgrading Mainboard in Lecroy DDA-3000 (aka WavePro 7300a?)

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sixtimesseven:

--- Quote from: Jens01 on December 26, 2019, 07:53:31 pm ---I've recently acquired a Lecroy WR6030, which failed to start the Waverunner software. Did a clean install (W2000 -> WXP) and the unit since then worked flawless :scared:. Big thumb up for all the work already done on the forum, including the working touchscreen-driver :)

After a bit of playing around i found out this (non-a) 6030 supports 2x 5GS/s in interleaved mode, but the datasheet and the front panel suggest only 4x 2.5GS/s is supported. Only the 6030A should support this conform the datasheet. Did Lecroy upgrade these units by just updating the firmware? The unit is probably 'uphacked' by the previous owner as all the options are available including non-ordeable USB2 and ENET. The status menu does mention the unit is a 'WR6030'.  Firmware is 8.1.2.0, latest available. Did they really gave the doubled sample-speed for free or am i missing something?

(Attachment Link)

The oscilloscope feels a bit slow and the fans sound like they need replacement, so i will upgrade this unit to W7Pro, S775, core2duo E6600 + SSD if i can find the right Motherboard. The combination of right chipset, available PCI-slots, AGP slot and native SATA is quite hard to find.

The unit now only has some cosmetic 'problem', the previous owner lost or broken the original front-panel knobs ( |O ) and therefore the knobs are replaced by some ugly black-red universal knobs. And not one, but all of them. Does anyone know if Lecroy is willing to sell replacements or if the original knobs (or some universal white knobs) are commercially available? I've tried Farnell, Digikey and AliExpress but the combination of grey/white + D-shaft does not gave a lot of options.

--- End quote ---

I would throw out the APG card and replace the screen and touch panel with something more modern and with higher res. Screen and LCD of this scopes really give their age away. Also, at least in the 7/8k series it seems to be really difficult to run the touchstone apg card on different mobo's because of the missing bios drivers.
If you ditch the LCD, all you need is a single PCI slot which quiet a few boards have even up to 3th gen i3/i5/i7.

Fans, not sure how the WR look inside or what fans are in there but make sure you replace the fans with equivalent airflow/pressure models...

Knobs: There is a guy selling 7/8k knobs on ebay. He charges 15 Euros a pice :rant:
I drew some 3D printable ones myself but the original ones have a weird temper shape and kind of a continious rounding at the top which I have not been able to reproduce with my limited cad knowledge yet :(

analogRF:
I have got a WP7200A in a pretty decent shape which does not turn on. When the power button is pushed the fans spin for a split second
and then it shuts off. I can also hear the HDD wanting to start. the whole thing takes less than 1 second.

When I manually pull down the green wire on the ATX power connector on the motherboard, the system turns on and fans stay on and i can hear the HDD spin but then nothing...nothing on screen and no LED on front panel light up, maybe there is a quick flash of backlight on the LCD but nothing else.

Any idea how the power switch is wired/routed in this thing? I can see it is connected to the display/fan board but it should somehow reach the motherboard.

Any idea where i should start?

by the way, when I manually keep the power running, I measured the voltages on the motherboard connector and all are very accurate and noise free. I don't think it's a power supply problem at this point.

happy new year  :)

ollopa:
Sounds like a bad motherboard to me -- might be a good time to consider an upgrade.  Look for any bulging or leaking capacitors.

nctnico:
I'd connect an external monitor first to verify whether the motherboard boots or not. AFAIK Intel boards are not known for having bad capacitors.

analogRF:
all caps seem in pretty good shape. nothing on external monitor either. I also changed the LCD with an identical one which is degraded but working, nothing changed...the thing is it does not even stay on and shuts of in a second. but when I manually keep it powered on
all voltages on the motherboard are ok and nothing is pulled down...is it possible that acq board is pulling down some other PSU lines and it shuts off but i cannot see its effect on the ATX connector?

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