BM235 LCD issue - Page 1
Forum section: electronics / testgear

author: OhmSweetOhm
author_rank: Newbie
timestamp: September 18, 2017, 01:27:43 pm
content: Has anyone seen this issue:https://youtu.be/jv7QGay5DNsThere is no usable function due to this behavior rendering the meter unusable.Is there a fix?

author: Dan666
author_rank: Contributor
timestamp: September 18, 2017, 08:59:41 pm
content: It seems it's "rebooting" continually.I have one, and it does show the test screen when I first switch it on, but then of course it stops and you can use it...I can't help you any further, tho... I'm sorry, I'm not competent enough.Edit: actually I have a question: is it brand new? have you ever seen it working properly?Also, try to switch it on without test leads, who knows?But then, if it's new it's better to send it back, it really shouldn't do that.Danilo

author: Mr. Scram
author_rank: Super Contributor
timestamp: September 18, 2017, 09:50:00 pm
content: Good luck dealing with that supplier. I've heard it's a terrible guy

author: retiredcaps
author_rank: Super Contributor
timestamp: September 18, 2017, 10:15:56 pm
content: Have you tried the obvious and inserted brand new fresh batteries? If yes, then contact Dave for a replacement. He might make a video out of it trying to repair it?

author: Mr. Scram
author_rank: Super Contributor
timestamp: September 18, 2017, 10:43:23 pm
content: Quote from: retiredcaps on September 18, 2017, 10:15:56 pmIt's in the video. Brand new Dooracell batteries

author: ModemHead
author_rank: Frequent Contributor
timestamp: September 18, 2017, 11:32:26 pm
content: Quote from: OhmSweetOhm on September 18, 2017, 01:27:43 pmI can induce the continuous-reboot behavior by inserting a fair amount of series resistance into the power supply (800R - 1K). The low-battery icon stays on the whole time though, and I notice yours does not. But it wouldn't hurt to check for a defective cell, or bad contacts including the little springs that interface with the PCB.

author: Electro Detective
author_rank: Super Contributor
timestamp: September 19, 2017, 02:19:37 am
content: It looks like not enough grunt to boot/kick over properlyI second to ask are the battery contacts that go to the circuit board clean and making good contact?Any hairline cracks etc in the area?Have you tried other batteries, even old working ones?Ask Mr. Jones if you can send it in for a teardown and fix,with a bit of luck he'll either sort it out in a few minutesor get down and dirty on Youtube with that screwdriver!

author: retiredcaps
author_rank: Super Contributor
timestamp: September 19, 2017, 03:21:50 am
content: Quote from: Mr. Scram on September 18, 2017, 10:43:23 pmSorry, didn't have sound on when I watched the video.The reason for suggesting the new batteries is I have seen this behaviour in Fluke 80 series I generation. The battery is too weak during power on self test and goes into the loop.

author: OhmSweetOhm
author_rank: Newbie
timestamp: September 29, 2017, 08:01:22 pm
content: Thanks for all the replies. The batteries test fine on their own and they are at full capacity. I recently moved and after a few months of sorting out my workbench I finally got around to firing up my meter to tests some resistors. That's when I noticed the test sequence loop. It had worked fine for months doing similar, light duty tasks. It had the factory bats inside so I immediately replaced them with a fresh set (each new bat tested a happy 1.5v). But, no joy was to be had, the thing just loops and loops no matter the mode.

author: OhmSweetOhm
author_rank: Newbie
timestamp: October 18, 2017, 09:45:54 pm
content: Quote from: Mr. Scram on September 18, 2017, 09:50:00 pmWell, you may be right. No word from EEVBLOG or Dave on this. Should have read the fine print - was there any?. He seemed willing to replace at first, but no response anymore. Buyer beware.

author: ka7gzr
author_rank: Contributor
timestamp: October 18, 2017, 10:03:41 pm
content: It appears it powers up and runs a self test drawing more power from the batteries. The batteries sag causing it to start a shutdown. With the load less on the batteries the voltage rises and a start is initiated. This process happens very quickly. And the process goes on and on...I would try new batteries even if the originals test OK.If its not the batteries I would look elsewhere in the power supply.Jim

author: joeqsmith
author_rank: Super Contributor
timestamp: October 18, 2017, 10:43:46 pm
content: Quote from: OhmSweetOhm on October 18, 2017, 09:45:54 pmI doubt there would be much risk dealing with Dave. Maybe he is doing a video on your meter and doesn't want to spoil the outcome.

author: EEVblog
author_rank: Unknown
timestamp: October 18, 2017, 10:52:46 pm
content: Quote from: OhmSweetOhm on October 18, 2017, 09:45:54 pmSorry, slipped though my email crack.One will be on it's way in the next shipment.

author: OhmSweetOhm
author_rank: Newbie
timestamp: November 02, 2017, 05:41:47 pm
content: Thanks Dave. Replacement received!

author: Electro Detective
author_rank: Super Contributor
timestamp: November 03, 2017, 08:10:57 am
content: Good show guysbut it's not over till the obese person sings... or something like thatWill Mr. DJ consider to-take it apart-on U-Toob and suss out what went south?I'd watch it