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My receiver has two bad relays, that sometimes do not switch. The headphones relay, and the center channel relay. If I give them a nudge or press them down they click into action. Why do they behave like this? Is there a trick to make them work better, or is the only solution to install new ones in?
There's always a possibility that the contact plates inside the relays are dirty. In some cases the relay cases can be opened and inspection/cleaning of the plates is always recommended. After cleaning them plates I usually apply a very small amount of clear silicone grease. It's worked good for me for years.There's always a possibility that the contact plates inside the relays are dirty. In some cases the relay cases can be opened and inspection/cleaning of the plates is always recommended. After cleaning them plates I usually apply a very small amount of clear silicone grease. It's worked good for me for years.
The attached image shows a relay with half of its contacts already cleaned and the other are shown as found. This caused intermittent sound drop-outs at lower listening levels. The attached image shows a relay with half of its contacts already cleaned and the other are shown as found. This caused intermittent sound drop-outs at lower listening levels.
Nettomech, thanx for the siggestion and pics. However my relays looked rather well boxed in and I couldnt immediately see how they would open.Nettomech, thanx for the siggestion and pics. However my relays looked rather well boxed in and I couldnt immediately see how they would open.
Nettomech, thanx for the siggestion and pics. However my relays looked rather well boxed in and I couldnt immediately see how they would open.Nettomech, thanx for the siggestion and pics. However my relays looked rather well boxed in and I couldnt immediately see how they would open.
Nettomech, thanx for the siggestion and pics. However my relays looked rather well boxed in and I couldnt immediately see how they would open.Nettomech, thanx for the siggestion and pics. However my relays looked rather well boxed in and I couldnt immediately see how they would open.
What is the easies way to get to check those relays, mine are clicking and center sound don't work. I like to check those solders but it looks like difficult to get to see the bottom. What i have to disassemble?What is the easies way to get to check those relays, mine are clicking and center sound don't work. I like to check those solders but it looks like difficult to get to see the bottom. What i have to disassemble?
can't remember if this receiver has an access panel on the bottom or not. flip it over and check. If it doesn't, you will have to take the main board and turn it over - not a really easy job. Easiset way to do it is probably starting by taking off the back panel.can't remember if this receiver has an access panel on the bottom or not. flip it over and check. If it doesn't, you will have to take the main board and turn it over - not a really easy job. Easiset way to do it is probably starting by taking off the back panel.
There is no access panel. I was thinking that, mayby it would be easier just cut hole the bottom, not sure yet. I allready took back panel off. This looks like a difficult job, but i'm going to try. I have no use for this receiver if the center sound don't work.There is no access panel. I was thinking that, mayby it would be easier just cut hole the bottom, not sure yet. I allready took back panel off. This looks like a difficult job, but i'm going to try. I have no use for this receiver if the center sound don't work.
Ok. the main board is off and i have access to those relay solder connections. How i know if the solders are bad or if the relay is broken? solder looks ok, like all the solders. I don't wan't to put this back together for no nothing. Should i order new relays and replace the old ones?Ok. the main board is off and i have access to those relay solder connections. How i know if the solders are bad or if the relay is broken? solder looks ok, like all the solders. I don't wan't to put this back together for no nothing. Should i order new relays and replace the old ones?
does the center channel ever work? If you press on the board does it go on and off at all? Maybe you just need to reset the unit. turn it off, then press and hold the power button - this should reset itdoes the center channel ever work? If you press on the board does it go on and off at all? Maybe you just need to reset the unit. turn it off, then press and hold the power button - this should reset it
No it doesn't. I reseted the unit like you said, nothing. Then i hit the relay and first time i got some sound from the center, but it was only some buzzing, no good sound.No it doesn't. I reseted the unit like you said, nothing. Then i hit the relay and first time i got some sound from the center, but it was only some buzzing, no good sound.
Could be that it is not the relays at all. Try wiggling IC501 on the main board (you should be able to find it on the right side of the main board). It is also prone to having bad connections and is only for the center channel so wouldn't effect anything else if it was the problem.Could be that it is not the relays at all. Try wiggling IC501 on the main board (you should be able to find it on the right side of the main board). It is also prone to having bad connections and is only for the center channel so wouldn't effect anything else if it was the problem.
I wiggled IC501 and nothing. Got a buzzing sound again when i gave a firm hit to the middle one of the three blue relays.I wiggled IC501 and nothing. Got a buzzing sound again when i gave a firm hit to the middle one of the three blue relays.
sounds like you will need to take it in to have a pro look at it. Hard to determine where the audio is stopping at without having an oscilloscope hooked up.sounds like you will need to take it in to have a pro look at it. Hard to determine where the audio is stopping at without having an oscilloscope hooked up.
The sound what i'm getting is more like crackling than buzzing. There is also little bit off the clear sound, like what it should be.The sound what i'm getting is more like crackling than buzzing. There is also little bit off the clear sound, like what it should be.
it doesn't really sound like the relay, but if you wanted to try it, you could swap relays from the center channel to one of the other ones and see if the problem follows the relay. That way you would know for sureit doesn't really sound like the relay, but if you wanted to try it, you could swap relays from the center channel to one of the other ones and see if the problem follows the relay. That way you would know for sure
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No, wd40, "please" first try checking the solder connections, 9 times out of 10 it's bad solder connections. Not every issue with older Electronics is Cap related!!! Onkyo is super easy to repair like I mentioned earlier, check the solder connections first, also check the ribbons, unplug the clean the contacts with DeOxit5, if you still need help, don't hesitate to contact me, good luck!!!
It wouldn't be your output transistors. If they go bad they blow the fuse. Sounds like a speaker relay problem. Have you checked the solder connections on the relays? They sometimes break down. If that doesn't help, I would replace the relay. Center channel goes through RY501. Sony p/n: 1-755-170-11.
I've tried using the balance for left and right speakers, and when the receiver is acting up with the right speaker having a low volume, I tried moving the balance all the way over to the right speaker. The right speaker volume will not increase in volume but the left speaker will decrease in volume.
Just to clarify, the center and the rear speakers are balanced. The issue only happens sometimes when I first power on the receiver I will have no center channel. If I leave everything alone for a few mins, the center channel will come on.
So it seems to me that something one the receiver is going. The question is, can anyone suggest a physical repair for the receiver for these symptoms?
The fact you have output from the headphones is a good sign. It shows the main amp is working fine. However water has clearly got inside something and affected it. The best course of action is to trace back the wires from the headphone socket and see if there is a relay or anything that could get water in it. If you do find something, try applying warm air from a hairdryer. The alternative is to apply a soldering iron to the solder conections of the device. This should get rid of any water inside. If all else fails you might have to replace the relay. But I would try a spray of Servisol first. Just in case some dust has got inside or mineral salt from the water.
The most likely cause of this is a bad output relay or relay circuit. Without seeing the unit and testing internal parts, I can not say for sure. If it is the relay, expect a parts cost in the $15 range.
First, unplug the extra speaker you have connected to the left channel. It will blow the channel if you have more than one speaker connected to each speaker output. It causes double the amount of current to flow thru the channel and will eventually cause you to pay much more for a repair.
The problem you have with the receiver could be a relay not making good connection inside of it. The speaker outputs have a relay for each pair of channels and if the contacts inside the relay get dirty, which they will do after a few years, can cause the problem you are describing. It could also be a broken solder connection on the relay or on the speaker jack on the circuit board. There are even several other things that could be causing it, but these two are the most likely. If you have no experience with electronics, you really should just take it in for repair. I have seen on many occasions when somebody tries to fix something themselves and cause much more problems than they started with. If you have a soldering iron, solder, and solder wick, you could open the unit up and check for broken or cold solder joints and then reflow the solder on them. Also, check the relay for bad solder connections. Many times you can take the top off of a relay and check the contacts and if you see black areas on the contacts they need to be burnished with a burnishing tool. You must also make sure that you put the receiver back together perfectly without forgetting anything. Make sure that all the ribbon cables and connectors are back in the proper places, if one goes into the wrong connector, it will cause big problems, propbably causing smoke, which is a very bad thing for electronics.It is very likely that the repair will not be too expensive if you take it to a service center, probably under $100 depending on the rates and honesty of the service center. I have been repairing audio equipment for over 18 years and have seen many good and many bad repair centers.
Without having the receiver in front of me to check out, I cannot guarantee that the problem is what I have suggested, but it is the most likely problem with the symptoms you have described.
I hope this helps you to make a good desicion with your receiver, if you need any further help let me know.
mine is doing the same thing, you can hear a click sound and the channel will die. I think it is a relay or a shunt that trips when something goes wrong with that amp. I dont think it is worth repairing as there are some nice receivers out there for cheap. Maybe just a cold solder joint somewhere? Anyone know where and Ill dive in and resolder and post the results.
I was able to fix this issue by opening up the receiver, removing the circuit board that the power button and speaker selector knob contact, and then reseating that board back onto the circuit board it was connected to (the one with the majority of the control buttons). This completely resolved the problem. The power button works again and the audio does not drop out anymore.
Hi,
Happened across this forum looking for some remote info. Had a similar problem with my 945...main speaker outputs started to click off & on, no rhyme or reason. Found that the solder joints on the speaker output relays were cold (poor soldering). Actually happend twice, two different relays. Took me a while to find it, reflowed the solder, that solved the problem, over two years ago now. Are you able to dig into the receiver? Do you have a (good) soldering iron and some solder? If not take it to elec. shop and tell them to look for cold joints on the relays.
I have fixed 3 shorts on my de845. 2 have been caused by cracked solder joints. they were speaker cutout problems...yours most likely is the center channel relay on the main board.
take the thing apart. you need to get to the back of the main board and re-flo those solder joints. get your geeky pc buddy and do it together(buy him a sixer). its really not that hard...just a bunch of screws. disconnect everything from the main board including the front plate. be careful with the ribbon cable...mine is hurting at this point. not meant to be removed so many times. put it in straight. my leads bent, but was able to straighten them.
there are 5 relays together, one for each channel. they are white cubes and prb a little smaller than the tip of your finger. its the 4 leads on each of these that you want to take a soldering iron to . i'm not sure which ones the center channel so do them all in that area. it may be hard for you to tell which leads they are so just go overboard and at least get everything in the vacinity. i did all component leads because who's to say another's not ready to go bad. you've gone this far.
touch the heated up tip to all the leads at the very end of the barb. you can reflow the solder without actually touching it. the metal lead will get hot enough. hold it until the solder liquifies, then let it cool. do this on a flat surface.
my other fix once was a re-seating at the speaker switch a,b,a+b on the front plate. there are 2 boards plugged together there. i bent the leads slightly so they seated in more tightly.
if your left or right front goes out, sometimes thats an easy fix...try b if you're using a, or the opposite. don't forget the speaker cables. if you're using both zones then you prb already figured out you need to re-flo! test and cross your fingers. good luck.
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