Yamaha R9 - diyAudio
Jun 5, 2015 · Yamaha R9. Thread starter Audi2014; Start date 2015-06-05 12:48 pm; Status This old topic is closed. If ...
Yamaha AX-900U | Page 2 - diyAudio
Jan 1, 2025 · look at your bias spread voltage across Q319,321 emitters, is it, does it behave the same on both channels? If it behaves the same and the bias wont go uo then down stream there are still isuues. imo I'd replace everything on the OPS, bjts, 0.22, 0.47, use the toshiba 2sc5200n/2sa1943n,
Yamaha NS-30T tweeters - diyAudio
Nov 12, 2024 · A friend wants me to refurbish a pair of the above speakers, the Yamaha ns30t. It appears the tweeters are blown on both of them. It's hard to find a replacement Yamaha ja0534 tweeter, much less anyone pair of them. They occasionally pop up …
Tone Control Modification - diyAudio
Sep 29, 2020 · I've decided to modify the tone control of my receiver; SAE TWO R9. The schemetics is on attached. The specs indicates tone control operates at 100 and 10kHz for bass and treble, respectively. I wish to modify the tone control to operate at 50 and 15kHz instead. Could anyone help to tell me which parts should I modify?
stk-4151v test. - diyAudio
Apr 25, 2012 · I have a yamaha rx-v870 that I believe has a bad stk 4151v chip in it. If that board is plugged in the amp never comes out of protect. If that board is un plugged the amp doesn't get any signal to make a sound but does come out of protect. I am thinking that is the culprit, but can someone point...
Yamaha RX-V663 Power Supply Low Voltage - diyAudio
Oct 16, 2024 · Yamaha RX-V663 Power Supply Low Voltage. Thread starter Dav0_100; Start date 2024-10 -16 8:40 am; Jump to ...
Yamaha AX-900U - diyAudio
Dec 29, 2024 · Got a Yamaha AX-900U that wont come out of protection. If I measure the idle voltage i get -38vdc on the right channel and 0vdc on the left channel and neither side will adjust but I think thats because it is in protection mode. Wondering if anyone could take a quick look at the schematic and give some direction on where to start looking ...
Feb 20, 2003 · 5. Setting of R9 R9 determines the current to flow to the relay. Vcc minus the saturation voltage of Q13 , V6 = Vce(sat) = 1V and the relay current and resistance cause R9. 6. Setting of R10 , R11 and C3 R10 and C3 are a resistance and a capacitor which function to allow the discharge circuit to operate instantly.
Yamaha's Hyperbolic Conversion Amplification (HCA) Circuit
Sep 30, 2009 · No one expected from Yamaha, that such an innovative topology is in use in their power amp model. Nobody has investigated therefore Yamahas HCA topology, although the circuit was not confidential and therefore it was inside of the associated service manual (some developers believe - as indeed we know - to have eaten the wisdom with spoons).
Yamaha - Natural Sound System - Model CA-700 - diyAudio
Oct 11, 2005 · I have an old Yamaha amp which I was about to gut and install a chimpamp into when I thought, maybe there is someone out there that would appreciate this old amp the way it is. 😉 It actually works. There is a problem with some of the switches, and it sounds, well.... bad, maybe very bad. It looks like the amp modules have been repaired in ...