Author Topic: Upgrading Mainboard in Lecroy DDA-3000 (aka WavePro 7300a?)  (Read 90507 times)

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Offline BeckGyver

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Re: Upgrading Mainboard in Lecroy DDA-3000 (aka WavePro 7300a?)
« Reply #675 on: August 30, 2020, 12:41:09 pm »
I searched for the "Demo Mode" but could not locate. There are some Scope-Settings and I reset to those but had the same waveforms.
I assume these demo waveforms are stored data and not a generated waveform fed to the inputs. Therefore not a real test of the frontend.

The Mainboard installed is a Intel D845GERG2 - I have attatched some pictures.
I have an Asus P4P800-VM with 4gb and P4 3.2GHz HT available and would like to throw it in together with a ssd and go for a full re-install on Win XP. But befor I go this route, Prio1 for me now is to find what is wrong with it (and it seems so from my feeling now).

Unfortunately it has been Win2k on production.
I am not afraid of going deeper into the scope and change it to other mainboards and change screens as well, but would like to go step by step to not enter the rabbit hole with light speed.

I have access to all the files in driv D: and will go for a DD and recover to se what was in there befor it was dumped. I can also get the logs from service menu, please let me know which is the right to look for.
 

Offline Converter

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Re: Upgrading Mainboard in Lecroy DDA-3000 (aka WavePro 7300a?)
« Reply #676 on: August 30, 2020, 04:12:10 pm »
1. In fact, there are a lot of motherboards that fit. Any motherboard with 1 PCI port will work. Do not look specifically for the AGP port - you can connect the LCD matrix in any alternative way. I would recommend a motherboard with built-in lvds or parallel (TTL) video output to directly connect your LCD matrix (depending on your matrix model), for example AIMB-582. By the way, this is exactly what LeCroy did in many of his other oscilloscope models. In this case, from the BIOS menu of the motherboard, you will be able to change the video signal format, for example, if in the future you want to use a 1024 × 768 matrix (which you will not get if you use the original video controller).

2. First, check the correctness of all supply voltages on the ACQ board. A large set of different voltages comes from the power supply, and there is also a number of voltage converters directly on this board. You must check each one.
 

Offline BeckGyver

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Re: Upgrading Mainboard in Lecroy DDA-3000 (aka WavePro 7300a?)
« Reply #677 on: August 31, 2020, 10:30:14 am »
I would love to go for the better screen in the future and even get rid of the AGP card needed so far. For now I need to get this thing working properly and then we go for polish.

Is there any kind of Service-Manual available which gives an overview of the used powerrails on the acquisition board ? Does anyone know where the Monitoring ADC is located and how it comunicates with the Aladdin Card (maybe I2C address)?

I have added some photos of the physical aladdin card, should there be more than the "X-Stream DSO Devices" in the device manager or what is the Hardware-ID of these cards?

What kind of High-Speed-Bus is used by the Aladdin card to communicate to the acquisition board ? Can this bus be tested?
« Last Edit: August 31, 2020, 05:01:01 pm by BeckGyver »
 

Offline Converter

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Re: Upgrading Mainboard in Lecroy DDA-3000 (aka WavePro 7300a?)
« Reply #678 on: August 31, 2020, 02:12:40 pm »
I have not yet studied this architecture so deeply. It would also be helpful for me if someone could provide information on the above issues. For communication with the interface board, 6 Gigabit Ethernet lines are used, this is not a secret.
 

Offline georgo

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Re: Upgrading Mainboard in Lecroy DDA-3000 (aka WavePro 7300a?)
« Reply #679 on: August 31, 2020, 09:09:07 pm »
I recently purchased a SDA 3010 second hand and after that i contacted the official Lecroy Support, whether they would be so kind to provide me Performance Verification Documents for this Model. The replied immediately and sent me the following 4 files:

'Chapter 3 - Specificationsrev2.pdf'
'Chapter 4 - Theory of Operation.pdf'
'Chapter 5 - WP7K Performance Verification revD.pdf'
'Chapter 5 - WP7K Performance Verification Test Record revD.pdf'

I won't share this files here on the forum but I want you to know that you can go and ask LeCroy support, they have been really kind and helpful in my case.

Another thing I want to ask if the gerber/schematics for SIL151 hdmi to lvds boards from wldshy are available?
 

Offline Mechatrommer

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Re: Upgrading Mainboard in Lecroy DDA-3000 (aka WavePro 7300a?)
« Reply #680 on: September 01, 2020, 02:13:24 am »
I recently purchased a SDA 3010 second hand and after that i contacted the official Lecroy Support, whether they would be so kind to provide me Performance Verification Documents for this Model. The replied immediately and sent me the following 4 files:

'Chapter 3 - Specificationsrev2.pdf'
'Chapter 4 - Theory of Operation.pdf'
'Chapter 5 - WP7K Performance Verification revD.pdf'
'Chapter 5 - WP7K Performance Verification Test Record revD.pdf'

I won't share this files here on the forum but I want you to know that you can go and ask LeCroy support, they have been really kind and helpful in my case.

Another thing I want to ask if the gerber/schematics for SIL151 hdmi to lvds boards from wldshy are available?
before asking them.... what if our case on Lecroy support is not the same as your case? can we PM?
It's extremely difficult to start life.. one features of nature.. physical laws are mathematical theory of great beauty... You may wonder Why? our knowledge shows that nature is so constructed. We simply have to accept it. One could describe the situation by saying that... (Paul Dirac)
 

Offline darkstar49

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Re: Upgrading Mainboard in Lecroy DDA-3000 (aka WavePro 7300a?)
« Reply #681 on: September 01, 2020, 09:55:47 am »
I searched for the "Demo Mode" but could not locate. There are some Scope-Settings and I reset to those but had the same waveforms.
I assume these demo waveforms are stored data and not a generated waveform fed to the inputs. Therefore not a real test of the frontend.

The 'demo mode' gets activated when the XStream software can't access the acquisition board (when the interface board can't be accessed, the software won't even start).
To my knowledge, the only way to deactivate it, is via the service menu. Some have said that the demo mode might also be linked with the DEV option, but I've never seen anyone elaborate on this.
 

Offline Mechatrommer

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Re: Upgrading Mainboard in Lecroy DDA-3000 (aka WavePro 7300a?)
« Reply #682 on: September 03, 2020, 03:37:22 pm »
Another thing I want to ask if the gerber/schematics for SIL151 hdmi to lvds boards from wldshy are available?
cant PM you further georgo, your inbox is full, here is the msg... (i think you need to post more to get more priviledge such as inbox space, not sure)

Quote from:  PM me
good to know thanks for the tip - are the gerbers for the SIL151 PCB available on the Forum? - i did search but I most have overlooked them? Do you know on which page they are?
to be frank, i dont know what is SIL151 :-\ until you mentioned it, searching in eevblog also returns none. so i guess you have to study that outside eevblog, ie google, sorry.. looking back at your post, you've been sent chapter 3 and 4 whereas me, they only sent me chapter 5 (and lots of *lss files), but i guess chap 3 and 4 only the usual user's manual and device specification thats available in the net right? not really crucial for verification process (chapter 5) i guess. cheers.
« Last Edit: September 03, 2020, 03:39:17 pm by Mechatrommer »
It's extremely difficult to start life.. one features of nature.. physical laws are mathematical theory of great beauty... You may wonder Why? our knowledge shows that nature is so constructed. We simply have to accept it. One could describe the situation by saying that... (Paul Dirac)
 

Offline BeckGyver

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Re: Upgrading Mainboard in Lecroy DDA-3000 (aka WavePro 7300a?)
« Reply #683 on: September 05, 2020, 02:48:16 pm »
Thanks for this input, that fits in the picture of missing/wrong voltages at the acquisition board. I will have a peak after i finish moving in the new house with a bigger bench and lab to get all tools on the table.

I will keep you in stream when I start working on this beauty again. I also got the adapters today and will be able to feed son signals as soon as I get this thing back working.

I also got an Error log of the Communication Test from the service menu:

Code: [Select]
0 1.9.2020  19:43:29 Informational CommTest ------------------ Starting Tests -------------------
 1 1.9.2020  19:43:29 Informational CommTest Processor Speed : 2870456832.000000
 2 1.9.2020  19:43:29 Informational CommTest Device Driver Build # : 1605
 3 1.9.2020  19:43:29 Informational CommTest PCI Card Revision : 16
 4 1.9.2020  19:43:29 Informational CommTest ------ Checking Gigabit Links -----
 5 1.9.2020  19:43:29 Informational CommTest Gigabit Signal detected on AAC Link
 6 1.9.2020  19:43:29 Informational CommTest Gigabit Signal detected on CH1 Link
 7 1.9.2020  19:43:29 Informational CommTest Gigabit Signal detected on CH2 Link
 8 1.9.2020  19:43:29 Informational CommTest ----- Starting Readout Tests -----
 9 1.9.2020  19:43:29 Informational CommTest Testing Readout on Channel 1
 10 1.9.2020  19:43:34 Warning CommTest Channel 1 Readout Failed ! Error - 79
 11 1.9.2020  19:43:34 Informational CommTest Testing Readout on Channel 2
 12 1.9.2020  19:43:39 Warning CommTest Channel 2 Readout Failed ! Error - 79
 13 1.9.2020  19:43:39 Informational CommTest Testing Readout on Channel 3
 14 1.9.2020  19:43:44 Warning CommTest Channel 3 Readout Failed ! Error - 79
 15 1.9.2020  19:43:44 Informational CommTest Testing Readout on Channel 4
 16 1.9.2020  19:43:49 Warning CommTest Channel 4 Readout Failed ! Error - 79
 17 1.9.2020  19:43:49 Informational CommTest ----- End Readout Tests -----
 18 1.9.2020  19:43:49 Informational CommTest ----- Starting DMA Tests -----
 19 1.9.2020  19:43:49 Informational CommTest Testing DMA Readout on Channel 1
 20 1.9.2020  19:43:55 Informational CommTest DMA Readout Error. Error - 79
 21 1.9.2020  19:44:00 Informational CommTest DMA Readout Error. Error - 79
 22 1.9.2020  19:44:05 Informational CommTest DMA Readout Error. Error - 79
 23 1.9.2020  19:44:10 Informational CommTest DMA Readout Error. Error - 79
 24 1.9.2020  19:44:15 Informational CommTest DMA Readout Error. Error - 79
 25 1.9.2020  19:44:15 Informational CommTest Transfered: 0.00MB at -1.#IND00MB/s
 26 1.9.2020  19:44:15 Informational CommTest Testing DMA Readout on Channel 2
 27 1.9.2020  19:44:20 Informational CommTest DMA Readout Error. Error - 79
 28 1.9.2020  19:44:25 Informational CommTest DMA Readout Error. Error - 79
 29 1.9.2020  19:44:30 Informational CommTest DMA Readout Error. Error - 79
 30 1.9.2020  19:44:35 Informational CommTest DMA Readout Error. Error - 79
 31 1.9.2020  19:44:40 Informational CommTest DMA Readout Error. Error - 79
 32 1.9.2020  19:44:40 Informational CommTest Transfered: 0.00MB at -1.#IND00MB/s
 33 1.9.2020  19:44:40 Informational CommTest Testing DMA Readout on Channel 3
 34 1.9.2020  19:44:45 Informational CommTest DMA Readout Error. Error - 79
 35 1.9.2020  19:44:50 Informational CommTest DMA Readout Error. Error - 79
 36 1.9.2020  19:44:55 Informational CommTest DMA Readout Error. Error - 79
 37 1.9.2020  19:45:00 Informational CommTest DMA Readout Error. Error - 79
 38 1.9.2020  19:45:05 Informational CommTest DMA Readout Error. Error - 79
 39 1.9.2020  19:45:05 Informational CommTest Transfered: 0.00MB at -1.#IND00MB/s
 40 1.9.2020  19:45:05 Informational CommTest Testing DMA Readout on Channel 4
 41 1.9.2020  19:45:10 Informational CommTest DMA Readout Error. Error - 79
 42 1.9.2020  19:45:15 Informational CommTest DMA Readout Error. Error - 79
 43 1.9.2020  19:45:20 Informational CommTest DMA Readout Error. Error - 79
 44 1.9.2020  19:45:25 Informational CommTest DMA Readout Error. Error - 79
 45 1.9.2020  19:45:30 Informational CommTest DMA Readout Error. Error - 79
 46 1.9.2020  19:45:30 Informational CommTest Transfered: 0.00MB at -1.#IND00MB/s
 47 1.9.2020  19:45:30 Informational CommTest ----- End DMA Tests -----
 48 1.9.2020  19:45:31 Warning CommTest Cannot Read Micro Version. Communication to the AAC Link is broken!
 49 1.9.2020  19:45:31 Informational CommTest AAC FPGA Version : 5.2
 

Offline Converter

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Re: Upgrading Mainboard in Lecroy DDA-3000 (aka WavePro 7300a?)
« Reply #684 on: September 05, 2020, 07:42:00 pm »
BeckGyver,
Can you show in which section of the system menu you receive this log?
 

Offline BeckGyver

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Re: Upgrading Mainboard in Lecroy DDA-3000 (aka WavePro 7300a?)
« Reply #685 on: September 11, 2020, 04:57:31 pm »
As I am currently moving to a new house I can not fire up the scope to take some pictures from the Menu, but I will do so as soon as I have a bench available.
If I am right I used "Production Access" and was able to get access to the event logs. You can export the Logs to a thumbdrive and analyze them on a real PC. In addition I noticed that some logs were overflown (in 2013) and so I exported them and cleared it afterwards.

You don't need the D drive at all. And you don't need to backup anything. The factory cal data is stored on the acquisition board itself en copied onto the hard drive automatically. The missing cal data is automatically created from the data gathered at the first time the oscilloscope is started.

A self calibration can be started from the service menu. Service center access is probably enough.

9472 Service Center
19641 Production Access
11011969 Kernel Access
22872201 Developer Access

I just wanted to share some news regarding possible adapters for the BMA adapter on the front. There are some adapters available from Aliexpress which cost around 10 bucks and look pretty nice. I ordered two of them:

https://de.aliexpress.com/item/32959937555.html

At the first glance they look pretty well made and I will have a test with the network analyzer at the new lab in some weeks.

I also attatched a picture of an original adapter LPA-SMA-A for reference ;-)
If someone is interested in building our own adapters please let me know. I also have some kind of galvanic isolation amplifier for low bandwidths in mind as well in the first place ( based on AMC1211x).
 
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Offline Mechatrommer

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Re: Upgrading Mainboard in Lecroy DDA-3000 (aka WavePro 7300a?)
« Reply #686 on: September 11, 2020, 06:11:45 pm »
this huber suhner looks much neater without that panel mounting protrusion, but more than double the price... consider shipping cost from china which one is cheaper..
https://www.ebay.com/itm/HUBER-SUHNER-22645644-33BMA-SMA50-1-199-UE-New/122016004771?hash=item1c68b87aa3:g:-3UAAOSwM5JZplW0

since you posted it, this is inside of LPA-BNC (i cant remember if i've posted it somewhere)...
[image refer attachment #1]

although my measurement setup can be questioned (due to difficulty to mate BNC converter to my N or SMA port connector during SOLT calibration and... the VNA used is not HP/Agilent) but fwiw, this is its S11 return loss and |Z|...
[image refer attachment #2]
[image refer attachment #3]
[image refer attachment #4]

the original LPA-BNC and the above LPA-SMA is solid metal end to end, quite hard finding the right material to diy, but i've made the pigtail type diy... BMA-BNC S11 return loss and |Z| (comparison with blue trace as control measurement, ie no diy-BMA adapter in between of coax cable (Huber-Suhner) and snapped together terminator+to BNC adapters.)...
[image refer attachment #5]
[image refer attachment #6]
[image refer attachment #7]
[image refer attachment #8]

i dont have original LPA-SMA and am not intending to get one, $250 for just some plastics and metals is just wow, so i just get one LPA-BNC (which has extra 6 pins female interface at the front), just to see whats inside it, ie BMA/BNC adapter and  the 6 pins connection, and to get the mechanical dimensions... they just both direct connection without any special component inside, yeah those all are for $250 the cheapest (used) i can find in ebay that time. btw this is diy BMA-SMA S11 return loss and |Z|. (i forgot to make control measurement)...
[image refer attachment #9]
[image refer attachment #10]
[image refer attachment #11]

the measurement was made feb last year. the BNC and SMA connectors used are from cheap China (direct connection/soldered to RG174 cable) but the BMA male (originally BMA-BMA pigtail cutted to half) and female-BMA to female-SMA adapter came all the way from USA, Tensolite brand, fwiw...
« Last Edit: September 11, 2020, 06:44:19 pm by Mechatrommer »
It's extremely difficult to start life.. one features of nature.. physical laws are mathematical theory of great beauty... You may wonder Why? our knowledge shows that nature is so constructed. We simply have to accept it. One could describe the situation by saying that... (Paul Dirac)
 
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Offline BeckGyver

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Re: Upgrading Mainboard in Lecroy DDA-3000 (aka WavePro 7300a?)
« Reply #687 on: September 11, 2020, 07:52:39 pm »
Thanks for all this info on the BNC type. I got the SMA adapter on cheap and knew already that it would be mostly very expensive air, but was to curios to open it myself.

I see the case you printed for the adapter and it would be very great to get the these cases done for me as well. As I lack a 3D printer, I think I will have to order them somwhere. Can you share the source for the cases ?

I have found several sources for the adapters on E-Bay as well, but was not sure if they fit properly. For just testing it 100$ plus import duty is a bit over. Maybe someon can use the links better than me, just search for the items:
324044159816  https://www.ebay.de/itm/RF-Connector-Adapter-1-Pc-M-A-COM-AMP-BMA-Plug-m-to-SMA-m-50-Ohm-18-GHz-NEW/324044159816
312540391224  https://www.ebay.de/itm/Lot-of-10-AMP-222699-1-Connector-Adapter-SMA-Jack-to-3-5mm-BMA-Plug/312540391224

I have a Tektronix Y400 with both YBA250 and YBT250 modules in calibrated state, I will have a run if I can find them in all the Boxes. 
 

Offline Mechatrommer

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Re: Upgrading Mainboard in Lecroy DDA-3000 (aka WavePro 7300a?)
« Reply #688 on: September 11, 2020, 08:35:59 pm »
https://www.ebay.de/itm/Lot-of-10-AMP-222699-1-Connector-Adapter-SMA-Jack-to-3-5mm-BMA-Plug/312540391224
be careful, by the look of it, its different from BMA used here. about the casing, its still unfinished business (as many others projects), i havent corrected the dimensions for proper mating to each other, and now i have resin 3d printer which is much better resolution and tolerance. next plan is to print with it, but since the casing was dimensioned to my fdm machine, i'll need to do major overhaul to it to print nicely with higher res resin type. btw we are wandering off topic i was dragged. this is motherboard upgrade thread, maybe we can post in more proper thread like this... https://www.eevblog.com/forum/projects/lecroy-connectors/msg2167048/#msg2167048

and i just found internal picture of my diy BMA-BNC somewhere buried in this forum (below)... got dragged again :P

It's extremely difficult to start life.. one features of nature.. physical laws are mathematical theory of great beauty... You may wonder Why? our knowledge shows that nature is so constructed. We simply have to accept it. One could describe the situation by saying that... (Paul Dirac)
 
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Offline georgo

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Re: Upgrading Mainboard in Lecroy DDA-3000 (aka WavePro 7300a?)
« Reply #689 on: September 22, 2020, 01:41:16 pm »
Hi,

I reconstructed the PCB made by wldshy. (cause I couldn't find the gerbers and i got no response when asking for it)

It is a small adapter board to interface HDMI to the NEC TFT-Display found in the WavePro 7k/SDA 3010/DDA 3000.

It is currently untested!!! (Rev. A) - I just send the board off to the pcb manifacturer and I will keep you updated if it is working[attachimg=1]

You can find the KiCad-Design here: https://github.com/ottingerg/sii151
 

Offline lukier

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Re: Upgrading Mainboard in Lecroy DDA-3000 (aka WavePro 7300a?)
« Reply #690 on: September 22, 2020, 01:47:26 pm »
Hi,

I reconstructed the PCB made by wldshy. (cause I couldn't find the gerbers and i got no response when asking for it)

It is a small adapter board to interface HDMI to the NEC TFT-Display found in the WavePro 7k/SDA 3010/DDA 3000.

It is currently untested!!! (Rev. A) - I just send the board off to the pcb manifacturer and I will keep you updated if it is working[attachimg=1]

You can find the KiCad-Design here: https://github.com/ottingerg/sii151

Is it something like that?
https://uk.farnell.com/midas/mcib-14/interface-board-hdmi-to-lvds/dp/2606863

I've used this board when I was modding WaveRunner 6100A, as the motherboard I've had to settle on didn't have LVDS output.

Fortunately, now with DDA-3000A I use Advantech with LVDS so new XGA panel has direct connection to it.
 

Offline georgo

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Re: Upgrading Mainboard in Lecroy DDA-3000 (aka WavePro 7300a?)
« Reply #691 on: September 22, 2020, 03:37:45 pm »
this board is intended to drive the NL8060BC26-17, which uses a CMOS-Level 3v3 Interface instead of the LVDS
 

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Offline georgo

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Re: Upgrading Mainboard in Lecroy DDA-3000 (aka WavePro 7300a?)
« Reply #694 on: October 10, 2020, 08:32:15 pm »
some update on my sil151 adapter.

Rev.A has the following issues:

*) HSYNC / VSYNC Lines were swapped
*) Hotplugdetection (Pin19) on HDMI was not connected -> Fix was to add 1k to Pin18 (V+)
*) Rev.A uses a single Powersupply (3V3) whereas in the original Design the TFT is driven with 5V Supply and 3v3 Signals. I did modify one Board and added a 3v3 LDO to power the board and connected 5v directly to the FPC Connector

(I attached a picture - this is how i inteded to mount the board, which didn't worked out)

=> after this modifications the board is working. However the FPC connector is loose and maybe I damaged the cable already so It is not yet working reliable.

---


After I getting the Display working. I swapped the motherboard with an Motherboard from a Lenovo Thinkcenter M92p - the nice thing about these motherboards they have the Q77 Chipset, 2x PCI and an internal Displayport. On the ugly side - Powersuppy, PCFrontPanel and FrontUSB Headers are not standard. For Powersupply I ordered an adapter kabel - for the headers I did swap the connector pins in the cables to match the pinout.

 I installed Win7 Pro 32 Bit and the dxl driver set (v3) - and on top of that the ZtiLecroyFPanelFix-2019-02-24.zip - apart from the touchscreen everything was working smoothly.

but .. I assembled everything back together and installed the Touchscreen drivers - and after this somehow the Frontpanel stopped working. No LEDs no response whatsoever. I tried reinstalling the driver several times (starting safe mode and removing the driver). But I could not fix the issue.

My fist QUESTION: When I try to remove the FrontPanel driver from the Device Manager - I do get a Windows BlueScreen. Has anyone experienced a similar problem?

My second QUESTION: I did install the 3M TouchPanel drivers working on the Serial Interface. They do work on the Windows Desktop but when I start the DSO Applikation they cursor movement from the Touchpad stopps during Application Startup ... after quitting the DSO Application the Touchpanel remains unresponsive until i reboot the OS.
 

Offline georgo

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Re: Upgrading Mainboard in Lecroy DDA-3000 (aka WavePro 7300a?)
« Reply #695 on: October 11, 2020, 07:07:22 pm »
I just made a Rev.B of the Sil151 Adapter Board.

https://github.com/ottingerg/sii151/tree/Rev.B

*) Added Resistor for HDMI Hotplug detection
*) Added 3v3 LDO to have one 5V Powersupply for the panel and 3v3 for the board
*) Changed 2 Pin Power Connector to 3 Pin, added Sync detected Signal
*) added  Decoupling-Cap for EDID-EEProm
*) Swapped HSYNC and VSYNC Line
 
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Offline georgo

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Re: Upgrading Mainboard in Lecroy DDA-3000 (aka WavePro 7300a?)
« Reply #696 on: October 12, 2020, 07:25:59 pm »
I've still got issues with the frontpanel on my SDA3010. Whenever I try to remove the loaded driver from device manager I will get a blue screen with "REFERENCE_BY_POINTER" Error. I did a fresh Win7 x32 install but the problem ist the same.

When I run the DSO Application  - the FrontPanel Emulation shows up - and entering the Service Menu I get Hardware ID = None and Led SlaveAddr = -1

Could it be a hardware Issue? Has anyone experienced a similar problem?
 

Offline Mechatrommer

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Re: Upgrading Mainboard in Lecroy DDA-3000 (aka WavePro 7300a?)
« Reply #697 on: October 13, 2020, 11:28:26 pm »
not sure your problem is, but starting last night i removed my SDA6000 from its operation place into service place because it was giving me persistent random screen colors and dots and blue screens of death during probing few weeks ago. sometime i noticed corrupted/sliced text etc, i thought like display memory corruptions or loosen cable connection. last night i opened it up and turned it on (because i'm going to use it soon, so repair first) and the problem got worse, random color dots, and then squares and horizontal dashes and stripes everywhere during boot screen and unable to enter windows and then bsod, i was imagining the worst like damaged/incompatible motherboard and cpu (D865GSA + Pentium D 945 2 cored combo) i thought i'm going to need new more modern motherboard and will need georgo's hdmi to lvds adapter, or dso HW damage is also possible since i remember i lost traces plot on the screen and weird buttons blinks. i thought its going to be a long day or week for this repair project.. or if i cant find newer motherboard thats suitable, i thought i have to go back with the original motherboard that came with it which is highly underspeced from my current upgrade.

but luckily i got my mind settled down and do things rationally as its supposed to be, so i start with simple test first, one step at a time. i switched the 2x 1gb ddr memory that i bought 2nd hand about 2 years ago with the original 512mb ddr memory that came with the dso, turn it on and walla it works! i can start xstream app and get back my traces, no problem, no sign of corruption. turned it off and switched back to earlier ddr 1 piece at a time (1gb), it turned out one of the ddr piece that i bought is ending life, it went wacky and responsible for all the corruptions, so it goes to the bin and i'm currently on 1x 1gb ddr slot only temporarily, ordering another 4 pieces used kingston ram from eshop last night, better buy extra for spare parts. so luckily it was a quick repair and diagnostics. i was about to restore file system first but i thought file corruption is unlikely since i use new ssd. if i reformat the ssd first or worse dismantle the motherboard, really its going to be a long day of unecessary repair, just a lesson, the morale is, test simplest step first, dont go with emotion to deal with bigger thing, we wouldnt know... i think my dso is back again so far, hopefully for longer time. fwiw.

to georgo i hope you too can fix your problem soon. cheers.
It's extremely difficult to start life.. one features of nature.. physical laws are mathematical theory of great beauty... You may wonder Why? our knowledge shows that nature is so constructed. We simply have to accept it. One could describe the situation by saying that... (Paul Dirac)
 

Offline georgo

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Re: Upgrading Mainboard in Lecroy DDA-3000 (aka WavePro 7300a?)
« Reply #698 on: October 16, 2020, 04:13:48 pm »
just a small update on my frontpanel issue ... and i am also asking for advice if someone has an idea how I should proceed.

After trying various things. I found out that the Connector J4 on the frontpanel board - was not seated correctly. Most likely the +3v3 was not connected.
This cable connects via a 16pin ribbon J4 on the frontpanel to J10 on the Touchstone-Board. This cable carries power for the frontpanel but also I2C for identifying the type of frontpanel. The same I2C also connects to the ProBus-Interface via J3 on the frontpanel board.

But the Data from the frontpanel is connected to the Aquistion PCI-Board via J2 - the 22pin FPC.

I do think that the MCU on the frontpanel is a MC68HC705C8ACFB (or something similar in a QFP44 package).
https://www.mouser.at/datasheet/2/302/MC68HC705C8A-1126873.pdf

with this knowledge i tried to make an educated guess that the Data is transfered over a SPI bus. If this assumption is correct than the pinout of the J2 is something like that:

1 GND
2 GND
3 GND
..
7 GND
..
10 MOSI
11 SCK
..
14 SS/
15 GND
..
17 MISO
..
21 GND
22 GND

----

To verify this assumption I started up the DSO Application and switched CH1 (via the Mouse) ON and OFF - because this would also toggle the LED associated with it.

So I started measuring the SPI Lines.

At first it seemed that MOSI is not working, cause I could measure activity on SCK and SS/  but not on MOSI. So I was afraid that maybe the SuperIO LPC47N227 was damaged. But after repeating the mesurement I could also receive something on the MOSI Line, while booting windows ( probably during driver initialisation) and application start. There are some bytes transfered and it seems that the bytes are always 0x80 (MSB first).

After start of the DSO application I can switch CH1 on/off and I do get activity on SCK and SS/ but MOSI always remains high.

I am not quite shure how I should proceed ... I am grateful for any Ideas, howto debug this issue further?


Remark: Pushing Buttons or turning Knobs doesn't result in SPI activity
« Last Edit: October 16, 2020, 04:23:56 pm by georgo »
 

Offline georgo

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Re: Upgrading Mainboard in Lecroy DDA-3000 (aka WavePro 7300a?)
« Reply #699 on: October 17, 2020, 03:30:32 pm »
Digging deeper on the frontpanel.

After writing my last forum post, i stepped back and reflected if I am using the wrong drivers. I re-read the forum thread and concluded that I have to switch to v2 of DXL driver set (with the unmodified frontpanel driver) ... should have read the forum beforehand ...

With this driver I don't get the Bluescreen problem on removing the driver.

However still no success - so I decided to have a look at the LED shift registers - There are two of them U118 and U2 both of 74HC594-Type.

They are connected to J2

Pin 8 .. LED_RESET/ (STR/)
Pin 9 .. LED_DATA (DS)
Pin 11 SCK (SHCP)

SCK is shared with the MCU SPI. For the LEDs 16 Bits are clocked into the two registers.


With my Logic Analyzer I can see that LED_DATA is changing just fine (changes on CH1 Led are reflected on the LED_DATA).
BUT LED_RESET never is released!!!

Again when I look at the whole sequence I can measure activity on LED_RESET during driver loading, meaning the output of the SuperIO is working.

So my next guess would be that the LED Panel is somehow not properly addressed.

Could somebody please be so kind and lookup in the ServiceMenu (Code 9472) in the frontpanel section what the value of "LED Slave Address" is? thanks in advance.



 


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