Hello, long time no see! I picked up one of these subs but it seems to not want to power up? I have checked the fuse at the switch and it is good. The switch itself is functioning and i made it to the rectifier and it is testing good too... I believe just before the fwbr is a regulator transistor, it also tests good. This unit is a switching psu i think, so i need a bit of help as i am not super familiar with these newer designs. Not having a schematic is not helping at all either! Fwiw this amp module is supposed to be similar to a Velodyne DLS-3750r. Thanks in advance! Charles
I believe at power up to verify my ps, I should be reading +40v and a -40v at my filter caps. I think I need a signal into the unit to " wake it up" ?? I'm not getting any significant voltage at the main filters at the moment, but I'm guessing it's in a standby mode?
It has an auto on switch... I turned it off to do my initial testing. I'm kinda going in blind without a schematic, but I think at the IC I should have an approx 15v + and - ? Is this very typical? Also where do I check for excess DC ? Input side of the relay would be where I would think..
mastertech: Merry Christmas to you too. Not many holiday people around any more.
Dec 26, 2018 14:37:50 GMT -5
stridsvognen: Merry christmas everybody...
Dec 24, 2018 19:10:58 GMT -5
mastertech: Sounds nice. Would love to have many more pictures.
Oct 20, 2018 20:31:04 GMT -5
greg1292: Greetings from Denmark. Lots of ideas knowledge and bucket list. Gabor boards looking very nice indeed
Oct 20, 2018 16:38:34 GMT -5
kevin5418: Anyone has the Velodyne hgs12bg MPS board schematic ? thank U
Oct 6, 2018 0:58:34 GMT -5
mastertech: According to the SM ic711 must be installed with the firmware already in it. It can then later be upgraded. The correct ic is around 50 dollars. If you installed a blank ic it will not work.
Aug 19, 2018 20:01:39 GMT -5
ralph: Hello mastertech, sorry for the delay, if I replaced that IC, I was with short circuit, blocked the 3.3 volt regulator, put a new one but still do nothing, what could I do? Thanks for the reply
Aug 18, 2018 21:48:51 GMT -5
mastertech: Did you replace ic711?
Aug 12, 2018 18:55:42 GMT -5
mastertech: Just to clarify you replaced ic711 (STM32F101ZG), correct?
Aug 10, 2018 20:58:16 GMT -5
ralph: Hello, Mastertech, I'll send it to you
Aug 10, 2018 18:58:46 GMT -5
mastertech: I have no idea on the context of what you posted. Link me the manual and I can look it over.
Aug 8, 2018 20:05:37 GMT -5
ralph: This is what the manual says:
Aug 8, 2018 19:44:59 GMT -5
mastertech: Nope. That is only to update a preprogrammed CPU. It needs basic firmware just to function. Without that it does nothing. You most likely purchased a blank CPU. The service manual would be more specific but I do not have one for that model.
Aug 8, 2018 19:35:18 GMT -5
ralph: Hi, mastertech thanks for responding, but still without firmware Denon should appear information on-screen, so then update it via USB?
Aug 8, 2018 19:25:45 GMT -5
mastertech: Most likely has firmware.
Aug 8, 2018 18:13:28 GMT -5