Post by no1baggiesfan on Jan 30, 2019 15:20:24 GMT -5
My Yamaha amp RX-V671 has decided it no longer wishes to operate :/ I think we had a power surge/outage a couple of days ago as my PS4 informed me that I hadn't turned it off properly, it's usually left in rest mode to charge the pads, anyway, amp turned itself off when my wife turned it on, and then again, so I tried, same thing, I reset the amp, checked all speaker cables then powered it back on, success, it worked fine for about 45 mins then switched off again, now it will not stay on. Diagnostic mode gives the error: PS: PRT 135 H (the 135 value fluctuates from 130-145/ I have reset the amp 2-3 times) I also see a fluctuating value in p1-2 diagnostic: PS 160/129 which suggests a high volt error somewhere, 1.6v instead of 1.3v ? Been volt testing this unit today, Ac/Dc board for the 5v, turned amp off then knocked the on button and amp turned on but this time it stayed on, 🗣🗣 Still no red led so there is still an issue somewhere Any ideas please ? TIA
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