Anton Posted March 5, 2019 Report Share Posted March 5, 2019 Hi, I have a problem with Vision V290. It just stops working... Now the screen is blank and backlight flickers weakly every 2s. I have tried update firmware, but Visilogic can't connect. Also, I have tested power supply: Current 0.093 A, internal DC-DC converter 5V also works well. Please tell me how can I restore the PLC? Any help appreciated. Quote Link to comment Share on other sites More sharing options...
MVP 2022 Ausman Posted March 5, 2019 MVP 2022 Report Share Posted March 5, 2019 Anton, this solution is unlikely, but have you ensured that the power supply plug (and all other plugs ) are actually fully inserted? It is very easy to not push them in far enough. And also, have you had it opened up, and possibly disturbed something? cheers, AUs Quote Link to comment Share on other sites More sharing options...
MVP 2022 kratmel Posted March 5, 2019 MVP 2022 Report Share Posted March 5, 2019 7 hours ago, Anton said: screen is blank and backlight flickers weakly every 2s. It is sound like Watchdog try to restart system. Maybe you must try to remove battery and check it. If U<3V replace it. Try to restart, if not - try to go to info mode. Quote Link to comment Share on other sites More sharing options...
Anton Posted March 7, 2019 Author Report Share Posted March 7, 2019 On 3/6/2019 at 2:01 AM, Ausman said: have you ensured that the power supply plug Ausman, Yes, sure all plug inserted correctly. Also, I have check internal DC-DC 5V converter, it work well. PCB has been carefully checked - all contacts soldering well, no any damage. On 3/6/2019 at 2:50 AM, kratmel said: try to remove battery and check it. If U<3V replace it. Kratmel, battery replaced to new 3.2V but PLC is still won't start up... On 3/6/2019 at 2:50 AM, kratmel said: try to go to info mode Info mode is also not work Quote Link to comment Share on other sites More sharing options...
MVP 2022 Joe Tauser Posted March 7, 2019 MVP 2022 Report Share Posted March 7, 2019 It sounds like your V290 has failed. Do you have a spare? Joe T. Quote Link to comment Share on other sites More sharing options...
Anton Posted March 7, 2019 Author Report Share Posted March 7, 2019 4 hours ago, Joe Tauser said: Do you have a spare? Joe, I have small smd components and can order IC. Also I have all tools and can replace any IC on PCB. I think that this fault not rare. Also this PLC is used not over 5 Hours and it like new. I don't think that flash memory can dead. It looks like the unit have a problem with boot start. Does it have some procedure for recover firmware? Quote Link to comment Share on other sites More sharing options...
DanT Posted March 7, 2019 Report Share Posted March 7, 2019 Anton; Does the V 290 have a snap on I/O Module? Is it seated properly? and do you have the power also connected to it? and to the V290 3 pin terminal The 24 VDC Supply should be a regulated supply Where is the DC-DC regulator? On a Snap On I/O Module? The 5 V regulator for the Main unit is on the motherboard.. Hot old is the unit? Quote Link to comment Share on other sites More sharing options...
MVP 2022 Ausman Posted March 7, 2019 MVP 2022 Report Share Posted March 7, 2019 11 hours ago, Anton said: Also I have all tools and can replace any IC on PCB. Anton, if your brand new car fails, do you immediately get out all your tools and replace the engine? 😀 Of course not, so why would you be trying to "repair" a brand new plc. Sometimes things do have assembly failures and are DOA. It sounds like you are into electronics, but in this case leave it alone and get a replacement under warranty. cheers, Aus Quote Link to comment Share on other sites More sharing options...
MVP 2022 kratmel Posted March 7, 2019 MVP 2022 Report Share Posted March 7, 2019 Maybe https://support.unitronics.com/index.php?/selfhelp/view-article/i-updated-my-plc-v570v350-system-files-and-i-had-power-break-down-during-the-download-now-my-plc-has-a-black-screen-how-can-i-recover-the-plc will be helpful. Quote Link to comment Share on other sites More sharing options...
MVP 2022 Joe Tauser Posted March 9, 2019 MVP 2022 Report Share Posted March 9, 2019 On 3/7/2019 at 3:47 AM, Anton said: Also this PLC is used not over 5 Hours and it like new. I don't think that flash memory can dead. I am a distributor. There is a two year warranty on Unitronics hardware. I'd contact your supplier. On 3/7/2019 at 3:47 AM, Anton said: I have small smd components and can order IC. Also I have all tools and can replace any IC on PCB. Schematics are not available anywhere, so this is a risky endeavor at best. Joe T. Quote Link to comment Share on other sites More sharing options...
Anton Posted March 9, 2019 Author Report Share Posted March 9, 2019 On 3/8/2019 at 2:16 AM, Ausman said: get a replacement under warranty Ausman, please don't worry, PLC is stop working 7 years ago and has been replaced to new other. But now it time for repair this PLC because the warranty is over. On 3/8/2019 at 4:24 AM, kratmel said: black-screen-how-can-i-recover-the-plc Thank you Kratmel and all. This is helpful. The problem has been in a small soldering ball that shorted two pins in IC memory. After removing this ball PLC can bootstrap and updated to new firmware successfully. Quote Link to comment Share on other sites More sharing options...
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