Sony DPS-R7 Reverb DOA
Posted by Scott
My Sony R7 Reverb from eBay came today, dead. I replaced a dead battery tonight but that didn’t clear anything up, still just passing a dry signal and a dead rotary encoder knob. Not sure what the issue is, if anyone knows a good Sony tech let me know, I have the schematics. Also need a good Lexicon tech too.
9 Comments Leave A Comment
Ben says:
April 1, 2009 at 2:08 pmDo you want someone local? I know someone who could probably manage this, but it’d be another round of shipping.
Scott says:
April 1, 2009 at 2:49 pmben-
thanks, shipping is fine, just need the stuff fixed. let me know, you can reply here or to —-> talk “@ symbol” iso50.com
Alan says:
April 2, 2009 at 7:40 amEven when your taking pictures of your broken gear, I can’t help but attention to the color in lighting in all of your photos :)
Scott says:
April 2, 2009 at 8:08 amalan-
thanks. this one was all about the blue curves channel.
David says:
April 5, 2009 at 9:52 pmBut you know what isn’t broken, that nice Death Adder Razer mouse. :D
Chuck Zwicky says:
April 17, 2009 at 2:56 pmI pulled my R7 from the rack and powered it up to find a dead encoder wheel and no backlight on the LCD… the battery is fine at 3.0v After much puzzlement I began measuring the many many regulators (A variety of 78xx and 79xx as well as LA5666 ICs…
Check the two 5v regulators, IC 903 and 904… mine were putting out 0.7 and 1.8v… I will be replacing them in two days.
Chuck Zwicky says:
April 17, 2009 at 2:58 pmPS: I want those Chameleon Labs knobs ( the old grey ones). I see that you have replaced them with the black metal knobs…
urbex says:
October 19, 2009 at 11:09 pmI have an R7 that’s DOA as well–behaving exactly as Chuck’s after a battery replacement.
Did replacing the two 5v regulators end up fixing the dead encoder/backlight problem?
Neil says:
December 15, 2010 at 9:15 amJust for anyone who finds this on the internet, I want to say that Chuck’s regulator hunt was exactly what I had to go through.
Interestingly, it was exactly the IC 903 and 904 in mine too which were faulty. Replacing them brought the unit back online, rotary encoder and all.
Thanks Chuck!