Question about Audio Players & Recorders
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.
Posted on Apr 22, 2013
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Posted on Jan 02, 2017
it could be your wire. try using different speaker wire. if it still has that same problem, take the cover off and tap on the amplifier.
Posted on Mar 01, 2009
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.
Posted on Jul 27, 2007
SOURCE: Speakers Cutting Out
I posted this solution on FixYa to help someone who had the same problem, or at least a similar problem. If you remove the slotted panel underneath the bottom of the receiver, you can gain access to the underside of the main circuit board. There are 3 relay units there, they are blue boxes that can be seen if you shine a torch down through the top. I found the solder joints on these relays looked as though they had broken away from the board, there appeared to be a dark ring around the pin of the relay. I re-soldered 4 of these connections, and, so far, that seems to have done the trick. Time will tell. These relay units connect and disconnect the speakers. There is one other relay that is mounted on a seperate board above the main board, that I can't access easily. If this one is also faulty, I will be un-able to fix it, as it would involve removing the entire guts of the receiver. If any of your technical team disagree with my remedy, or can offer any other solution, that would be appreciated. Thanks.
Posted on Sep 15, 2008
This condition, may be produced by defective components (Q506, Q507). you can remove those transistor, replace the fuses, power-on and wait for relays click. if the fuses not blown again, them replace both transistor.
Posted on Mar 19, 2009
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