I have picked up this receiver from the bay. Previous owner stated, that had a power outage and after the power came back, the receiver was dead. I have opened up the receiver and I have checked some fuses, they all look good. There is 167V at the rectifier, also there is 11.5V VST. SMPS-POM and M_POM is 0v, though. Primary on the traf, is not open. elektrotanya has the sm. elektrotanya.com/onkyo_tx-rz800_sm_rev3.pdf/download.html I would appreciate any help.
It is getting some, but not enough. I'm not sure which pins should I have test, but I have tested Pins: 1, 5, 9 and 11. 1, 5 and 9 show a slowly rising voltage, from 0.38V to 0.42V. Pin #11 shows only 0.003V. When I was getting ready to put it away, I have started "feeling" for heat on the HDMI board. Very fast, I have noticed some heat, coming from under the mini HDMI female connector(front HDMI). I can't exactly find meet my finger the hottest part, but I assume that it is C7038(C106k/16V). It makes sense as well, if we look at the schematics. This capacitor, shows 3 Ohm to the ground. Tomorrow, I will remove that capacitor and I will see, if it will make a difference. What kind of capacitor is this?
Post by mastertech on Aug 22, 2018 10:58:34 GMT -5
Well the only thing questionable here is that it could be Q7018 getting hot which would be normal if that 3.3s line is shorted somewhere. That C7038 is real close to that Q7018 regultor. But it could be. I would not remove it yet but rather I would put some flux paste on that cap and regulator and maybe a few other parts in that area and then plug in the unit and see where the flux melts first. If it ends up the cap I would then remove it and do the ohm test across the pads. If it ends up the regulator I would not remove it just yet. Let me know what you get.
I did not check the forum for two days and I did not notice, that you have posted here. I have ended up removing the VDO and the L, or ferrite bead(check picture). The short, is toward the MPU.
You need to be more specific in what you remove other then VDO and ferrite bead. I need location id's even though you included a pic..
So I will assume you removed L7007 and you tested short to gnd on the pad towards the MPU. If correct there are still quite a few components that could be bad besides the processor. So you will have to remove parts and test the short each time you remove something. I will give you a list of parts to remove and it will be in the order I would like you to remove them and test your short each time and see if you reading drops.
L7003 first. If still short then remove Q7001, then Q7020, then Q7013. Let me know what you get.
!!! EDIT: I almost forgot. Can you disconnect whatever is connected to P7002A? Pin 14 on that connector is tied to that rail.
Last Edit: Aug 23, 2018 20:24:57 GMT -5 by mastertech
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