JoeMuc2009 wrote: > It is likely that the display filament power supply circuitry in your > Boom has failed. Many units suffer from this after some years. The > display itself is also wearing out, but if it goes all dark or starts to > fade from the outside edges towards the center, and sometimes recovers > after a few minutes of being powered-off, it's the filament supply with > 95% chance. > > I am using three run-of-the-mill diodes, each of which has a known > voltage drop of around 0.7V. Three of them in series make a total > voltage drop of about 2.1V. I am using them to pull down the voltage on > the filament's right side. Diodes are needed because current must not > flow from GND towards the filament pins. > > Cheers, > Joe
Hi Joe - Thank you so much for the tip, I restored 2 Booms. I though about putting a Zener but the current going thought it makes it out of normal operating zone - it's overdriven and not predictibale enough So I finally I just put the 3x1N4002 on the top side of the PCB , left/underneath to the top cable connector. There in un-pop pull-down resistor which right pin gives good access to ground. It fits very well. I did not have to disconnect the PCB, to access the rear, it was more comfortable LMS 7.7, 7.8 and 7.9 - 5xRadio, 3xBoom, 4xDuet, 1xTouch, 1 SB2. Sonos PLAY:3, PLAY:5, Marantz NR1603, JBL OnBeat, XBoxOne, XBMC, Foobar2000, ShairPortW, JRiver 21, 2xChromecast Audio, Chromecast v1 and v2, , Pi B3, B2, Pi B+, 2xPi A+, Odroid-C1, Odroid-C2, Cubie2, Yamaha WX-010, AppleTV 4, Airport Express, GGMM E5 ------------------------------------------------------------------------ philippe_44's Profile: http://forums.slimdevices.com/member.php?userid=17261 View this thread: http://forums.slimdevices.com/showthread.php?t=106381 _______________________________________________ Boom mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/boom
