RSDS 1152CML+ not booting - Page 1
Forum section: electronics / testgear

author: mrtimdog
author_rank: Newbie
timestamp: January 04, 2022, 01:25:18 pm
content: Hello!I've read a few people with similar issues to me, but none quite the same, so hoping someone can help ... please!I've got hold of a (duff?!) RS Pro digital oscilloscope, a RSDS 1152CML+, but it doesn't boot.I've tried various things:Using (<4G) USB flash drives in both front and internal USB socket, with firmware on from the Siglent site, but with no effect.Soldering up a serial connection, but seem to get jibberish with every protocol setting I try.Various key combinations on startup, hoping something may magically work, only holding down 'Math' seems to do anything, but doesn't help.Can anyone help with any other suggestions? It may be that the thing is just dead.Thanks,Tim

author: tautech
author_rank: Super Contributor
timestamp: January 04, 2022, 11:33:58 pm
content: Welcome to the forum.This is a rebranded SDS1152CML+ and to get past these boot freezes usually the Math button is pressed rapidly at boot.How far does the boot get ?Do you see sequences of the LED backlit buttons flash ?Is there any audible relay activity ?Have you checked the display backlight isn't just dead ?Shine a bright light on the display to see if there's any info on it.Now you have it open have you worked through the faultfinding section in the Service manual ?Use the SDS1002CNL manual:https://www.siglenteu.com/download/2710/

author: mrtimdog
author_rank: Newbie
timestamp: January 05, 2022, 10:35:53 am
content: Thank you, tautech,I've been through what I can from that manual, there doesn't seem to be one for the exact model, so the main board differs, i.e. the test points don't exist/match up.The power supply module looks good, and the start up sequence currently looks like this:Power on.Some button lights come on, see first attached photo.After ~1 sec, screen backlight on and RS PRO logo appears on the screen.After ~6 secs, a relay clicks, button lights switch to those in second attached photo, relay clicks again.Beeper sounds continuously.Stays as is until powered off.Does that mean anything specific?I've also tried rapidly pressing the Math button at boot as few times, which doesn't change the above sequence at all.Thanks, Tim

author: tautech
author_rank: Super Contributor
timestamp: January 05, 2022, 01:48:31 pm
content: Quote from: mrtimdog on January 05, 2022, 10:35:53 amOh damn, give me 24 to get the right manual.QuoteMicroSD card removed ?BTW, don't go applying any SW to the SD card slot unless you really know what you're doing.

author: mrtimdog
author_rank: Newbie
timestamp: January 05, 2022, 02:05:49 pm
content: Quote from: tautech on January 05, 2022, 01:48:31 pmHa, don't worry, not your fault, unless you've access to other docs not on the Siglent site, the service manual for the SDS1000CML+ Series scopes isn't listed herehttps://www.siglenteu.com/resources/documents/digital-oscilloscopes/#sds1000cml-series.Quote from: tautech on January 05, 2022, 01:48:31 pmCorrect, no cards in either slot.Quote from: tautech on January 05, 2022, 01:48:31 pmI don't really, so I won'tThanks, Tim

author: tautech
author_rank: Super Contributor
timestamp: January 05, 2022, 02:16:02 pm
content: Quote from: mrtimdog on January 05, 2022, 02:05:49 pmAt one time CNL/CML shared the same PCB however the later Plus versions with LAN and higher res display have obviously changed and I haven't got a copy spirited away.So I'm gunna get one !Trust me laddie, I can get access to all sorts of things.

author: mrtimdog
author_rank: Newbie
timestamp: January 05, 2022, 02:21:52 pm
content: You are an absolute star for helping, even if this does turn out to be a doorstop!Let me know if you need any more info, eg. numbers, id's, etc., from the boards!Cheers, Tim

author: tautech
author_rank: Super Contributor
timestamp: January 05, 2022, 02:39:10 pm
content: Quote from: mrtimdog on January 05, 2022, 02:21:52 pmIt won't but it may be another brand when it's fixed.QuoteNo, we're all good but let's work through the service manual checks/tests to ensure the HW is sound before going further. I suspect the HW is OK by your previous post but the system buzzer going is a new one on me.

author: tautech
author_rank: Super Contributor
timestamp: January 06, 2022, 03:56:49 am
content: CML+ Service manual attached.

author: mrtimdog
author_rank: Newbie
timestamp: January 06, 2022, 08:13:33 am
content: Quote from: tautech on January 06, 2022, 03:56:49 amBingo! Thanks, tautech, I'll get on it! ... I do have CFS/ME, so could take a while, but won't give up

author: mrtimdog
author_rank: Newbie
timestamp: January 06, 2022, 12:48:43 pm
content: Quote from: mrtimdog on January 06, 2022, 08:13:33 amAh, bugger, spoke too soon! The main board's still different!?!I've attached the main board diagram from the SDS1000CML+_DL+_Service Manual_E01A doc, and another photo of the one in my scope. Maybe the '_DL+' means the doc's for a different scope again?

author: mrtimdog
author_rank: Newbie
timestamp: January 06, 2022, 05:55:11 pm
content: On the back of the main board it says SDS1000A.

author: tautech
author_rank: Super Contributor
timestamp: January 06, 2022, 08:13:48 pm
content: Yet the manual is close enough for the checks listed on P54-57 although you might need magnification to see some of the test points on the mainboard.Do you have another scope or counter to check the clock frequencies ?

author: mrtimdog
author_rank: Newbie
timestamp: January 06, 2022, 10:33:57 pm
content: Thanks tautech, I'll see if I can match up the test points in the morning. Do the numbers match up?I don't have another scope or counter, I'll see if I can borrow one from somewhere!Cheers, Tim

author: tautech
author_rank: Super Contributor
timestamp: January 06, 2022, 10:35:29 pm
content: Check your messages Tim.