Post by mastertech on Dec 21, 2016 21:24:32 GMT -5
It looks like a lot of Onkyo AVR's are having main relay failures on the power supply board. The original relay is a 9 volt coil but the supply voltage is 12 volt. I don't know if this is the reason for failures or if it is just a poor relay to begin with. But I have a confirmed drop in replacement 12 volt relay. Just unsolder the old relay and solder in the replacement and you are good to go if that was your original problem.
The relay is available from Mouser. Here is the link to the replacement. Happy fixing.
I have seen this a couple of times. One word of caution on simply replacing the relay with a 12V version is that on some models (I haven't checked all), Onkyo places a 150ohm 1/2W resistor in series with the relay. The function of this resistor is to reduce the voltage/current going to that relay but you won't see the voltage drop until the ground is applied from the transistor they use to turn on the relay.
I recently repaired an NR717 that not only had a blown relay but had also fried this transistor (Q9101) and the diode that is in this circuit (D9100). My immediate reaction was to change out the relay but almost immediately, the diode and transistor blew again. What I found was that the 150ohm resistor had degraded to about 147 ohms and was allowing too much voltage/current to be applied to these components. The "fix" was to replace the resistor with a brand new one (measured at 152 ohms) and then change out the transistor/diode pair again. I also replaced the relay with the original spec'd 9V part. The Receiver has now been working perfectly for over a month.
I suspect that these resistors are the root cause of the issues with blown relays and would encourage anyone doing this repair to check the 1/2 watt resistor to make sure it is equal to (or a higher value than) it's spec.
jbmeyer13: Wolfy's Marquee isn't working? Did you spill a pint on it and short the MB?
Apr 25, 2019 8:32:28 GMT -5
wolfman: Always the same sarkasm Kurt that's why I never checked in until now. I knew you wouldn't give me a cheerful answer so let you hang for a while. Removed the last part you probably are a decent guy Eye to Eye.
Apr 19, 2019 18:55:30 GMT -5
jaws55: want to make sure of value.
Apr 16, 2019 16:46:43 GMT -5
jaws55: Working on Pioneer VSX822K, need help finding value of ZD403, think its a 4.3 volt zener? Just won't to make sure, "no service manual"
Apr 16, 2019 16:45:26 GMT -5
stridsvognen: Wolfman, its768% better thanyour Marquee for sure. As it can actually display a image.
Apr 14, 2019 13:16:49 GMT -5
wolfman: So how's the black level on that thing? When the screen is supposed to go pitch black do you perceive it as genuinely black? Like the opening of CARS where it goes on and off pitch black. Or Prometheus with stars against a pitch black space.. or any Sci-Fi
Apr 12, 2019 15:18:06 GMT -5
stridsvognen: I have had multiple Digital projectors hanging together with the Marquee, the Sony is actually the first one that i actually turn on and use, so put 100 + hours on it already.
Apr 10, 2019 4:43:23 GMT -5
wolfman: What in the name of God possessed you to go gray.. Stoned are you?
Apr 8, 2019 9:46:25 GMT -5
stridsvognen: Its nice to have a new 5000$ digital to show off next to the Marquee, it makes the Marquee look like it worth all the 35000$ printed on the lable on the box.
Mar 8, 2019 6:38:53 GMT -5
nashou: uh oh!!!! Kurt likes shades of gray!!! Hopefully it will be Dark Dark grey !!!
Mar 4, 2019 7:47:17 GMT -5
stridsvognen: SONY VPL-VW270ES, 295 over there.. Got one for i price i could not refuse.
Feb 17, 2019 5:26:29 GMT -5
mastertech: And what gray did you go to?
Feb 16, 2019 16:41:00 GMT -5
stridsvognen: Guess who just went gray..
Feb 16, 2019 15:36:35 GMT -5
illium5: Thanks for your help with getting me setup on your site. Happy New Year.
Jan 16, 2019 22:37:21 GMT -5