Clicking sound then no sound to speakers

[hking]

Sound will be coming out of the speakers and everything is working fine. Then I'll hear a clicking sound from the receiver and the sound to the speakers will go out. If I wait a couple of minutes, I'll hear the click again, and the sound come back on. This happens continually. I took off the cover of the receiver and find the sound coming from one of two large cylinder shape tubes. If I tap it, I'll hear the clicking sound again and the sound to the speakers will come or go. Seems as if somethings loose in the tubes. On the tube it prints: 71v1000uF(M), (the "u" is the greek letter). I thought these tubes might be fuses or something so I took out the entire board and looke under it, but it was soddered on.

Anyways, any ideas on what's going on, or is it just time to get a new receiver.

 

[Seth=L]

Sound will be coming out of the speakers and everything is working fine. Then I'll hear a clicking sound from the receiver and the sound to the speakers will go out. If I wait a couple of minutes, I'll hear the click again, and the sound come back on. This happens continually. I took off the cover of the receiver and find the sound coming from one of two large cylinder shape tubes. If I tap it, I'll hear the clicking sound again and the sound to the speakers will come or go. Seems as if somethings loose in the tubes. On the tube it prints: 71v1000uF(M), (the "u" is the greek letter). I thought these tubes might be fuses or something so I took out the entire board and looke under it, but it was soddered on.

Anyways, any ideas on what's going on, or is it just time to get a new receiver.

Time to replace the capacitors. the large tube things are capacitors. If they are making noise there is a problem. I would disconnect the receiver from the wall as it may cause a fire.

The uF stands for microfarad (Faraday's Law). It is a measure of the storage of the capacitor. the 73 v tells you how fast the capacitor is able to release said energy in capacitor.

What is the receiver. Depending on what it is or how old it is, you may want to replace the receiver. I would imagine that a capacitor replacement wouldn't be too expensive, probably under the $100 mark to fix.

 

[Resident Loser]

Those "tubes"...

...are electrolytic capacitors in the power supply which are measured (as all good little capacitors should be) in micro-Farads (abbreviated uF)...since they have no moving parts, it's highly unlikely either one is actually doing any "clicking"...it's more likely an adjacent relay of some sort associated with the units' proctection circuit that's making the sound...

There is a reason for the notice of "no user serviceable parts" on the cabinet...if after some low-level, external troubleshooting the unit is at fault, do yourself a favor and bring it to a qualified service technician...only you can make the determination of whether it's "time" or not...

Protection is usually triggered by a fault with the loudspeakers or the wiring to them...Turn off the power, disconnect the speakers, being careful not to short out the bare wires...power back up...Still a problem, power down, disconnect the wires...then turn on the juice...Still a problem? See the above paragraph...

jimHJJ(...the only fuse you should futz with is the user-accessible one on the rear apron of the unit...)

 

[Seth=L]

Were the capacitors humming, maybe I missunderstood. But of course check your wiring, sometimes I go straight to the worst of things.

 

[j_garcia]

Sounds like shorted speaker wiring to me. That is what I would check first.

 

[dpnaugle]

me too

Interesting that this thread popped up today. I also have a similar issue with my Denon 2807. (system below) I would not expect this in a new receiver (month old). I will check connections and speaker wiring, and may try and return it but think I am beyond the 30 day return policy at best buy. Maybe a warranty issue now .

The symptoms with my problem are similar however the sounds stays off for only about 5 seconds. It happens several times a day playing CD's on my HD dvd player.

DN

 

[Resident Loser]

OK now...

Interesting that this thread popped up today. I also have a similar issue with my Denon 2807. (system below) I would not expect this in a new receiver (month old). I will check connections and speaker wiring, and may try and return it but think I am beyond the 30 day return policy at best buy. Maybe a warranty issue now .

The symptoms with my problem are similar however the sounds stays off for only about 5 seconds. It happens several times a day playing CD's on my HD dvd player.

DN

...a coupla' things...the protection devices are really a sledgehammer kind of affair...while their triggering is usually indicative of speaker/wiring problems, they can be "seeing" problems with the output circuits internal to the amp/rec...there also can be problems with the protection circuit itself...only a thorough investigation on a testbench can be specific...

Insofar as your trouble is concerned, are you quite sure it isn't a software problem or one with the DVD/CDP itself?...try another source, perhaps FM...you really need to sectionalize the problem before wasting your time (and perhaps money) taking the wrong thing in for service...and intermittent troubles are usually the most diffcult and costly (due to the "babysitting" factor, i.e. labor, involved).

jimHJJ(...and there are unscrupulous techs out there who will take advantage of the customers naivete'...)

 

[Haoleb]

The speaker protection relay (the clicking sound) could also be triggering due to high DC offset. Please do yourself a favor and refrain from poking around inside electronics, Especially when they are turned on, if you dont know what your doing. No offense but from your description. you dont.

If moving the capacitor around makes the problem come and go it could be you have a solder crack on the capacitor or one of the components around it. If the reciever was a good amount of money then You can try to get it fixed under warranty or take it to a repair shop. If its a cheapie and you want to upgrade anyway then your best bet would probbly be to do just that.

 

[dpnaugle]

Nice fix

So far so good. I went out and and bought so me banana tips and a surge protector to cleaned up the speaker connections and wiring. (I only just bought my system and my dealer ran out of tips when I picked up my speaks so they were on order).. Ive been listening for a few hours now and no cut outs.

Yesterday it seemed that about every hour or so the sound would cut out for a few seconds... Ill keep my fingers crossed.

Thanks for the tips



DN

 

[agarwalro]

Sounds like something is causing the protection circuit to be activated (the clicking sound is the relay in the protection circuit doing its job and preventing your receiver from burning up in a big puff of smoke).

Generally, the protection circuit may be activated by the following faults,

1) Speaker wire short (check all speaker wires and connections for shorts with mulitmeter or continuity tester)
2) Speaker drawing too much current (yours speakers should have 6 or 8 Ohms impedance for safe receiver operation)
3) Manufacturing issues in the receiver (most unlikely, but cannot be ruled out)

 

[f0am]

Those little round things (capacitors) DO NOT TOUCH THEM!.

 

[Seth=L]

Those little round things (capacitors) DO NOT TOUCH THEM!.

More specifically, don't touch the soldered leads where they are mounted to the circuit board. It could stop you heart. They store energy similarly to a battery only at a higher voltage. A battery can hold large amounts of energy but it is released slowly. You wouldn't get shocked by a 1.5 volt battery. The capacitors are rated at 73 volts that would easily conduct just by touching it. So even with the receiver off and unplugged it is potentially lethal, so be very cautious concerning capacitors.

 

[f0am]

More specifically, don't touch the soldered leads where they are mounted to the circuit board. It could stop you heart. They store energy similarly to a battery only at a higher voltage. A battery can hold large amounts of energy but it is released slowly. You wouldn't get shocked by a 1.5 volt battery. The capacitors are rated at 73 volts that would easily conduct just by touching it. So even with the receiver off and unplugged it is potentially lethal, so be very cautious concerning capacitors.

Ive melted screw drivers on capacitors befor, they were the size of a car battery but hey food for thought. DONT EVEN THINK ABOUT TOUCHING OR LICKING ONE OF THESE THINGS!

Seth 20 bucks if you post a video of yourself licking one

 

[Seth=L]

Ive melted screw drivers on capacitors befor, they were the size of a car battery but hey food for thought. DONT EVEN THINK ABOUT TOUCHING OR LICKING ONE OF THESE THINGS!

Seth 20 bucks if you post a video of yourself licking one

After weighing the pros and cons of doing that, I have relunctately decided not to lick a capacitor the size of a car battery let alone any sort of capacitor.

 

[hking]

Okay, messed around with it some more and think it's the capacitors. I tried different sources and same thing, reconnected all the wires same thing. Nudged the capacitors a bit and sound came on. Couple minutes later, I'll hear the click and the sound goes off. So I used a rubber band to keep the capacitor in place and now everything works fine. Played a game and sound remained on for 6 hours.

Wish I would've seen the warnings you guys posted before I kept messing with it. It's a $200 sony receiver so I'll probably trash it if it's gonna cost $100 for the capcitors. Now I'll have a reason to get the denon 4306.

 

[Seth=L]

Hey getting the Denon is a good idea as any.

It doesn't surprise me that it would have bad caps, Sony uses really cheap caps. I would keep a close eye on that thing, it could conceivably start a fire.

 

[dpnaugle]

back again

So a week has gone by and no problems. Today I was sitting in front of my equipment reading a CD cover and heard a click from the HD A2 then the clicking from the Denon... Silence for 2-3 seconds and then music again.

As I mention previously in this thread I cleaned up all the wiring and the problem seemed to go away. I suppose I could do a little more but now I am suspecting the Toshiba as the culprit. There does seem to be a few bugs with my HD A2. The most annoying is that occasionally if left on say over night it does not respond to any commands on the face panel or the remote. I have to unplug it. It reminds me of my PC.

What do you all think?

Oh yea, I'm not going work on this myself. These are warranty issues and I'm not an electrical engineer.


thx
DN

 

[snowy1]

Okay, messed around with it some more and think it's the capacitors. I tried different sources and same thing, reconnected all the wires same thing. Nudged the capacitors a bit and sound came on. Couple minutes later, I'll hear the click and the sound goes off. So I used a rubber band to keep the capacitor in place and now everything works fine. Played a game and sound remained on for 6 hours.

Wish I would've seen the warnings you guys posted before I kept messing with it. It's a $200 sony receiver so I'll probably trash it if it's gonna cost $100 for the capcitors. Now I'll have a reason to get the denon 4306.

i used to have a sony that would do that when i cranked on it more than it liked. then one day the protection tried to click on and it wasnt fast enough, and a puff of blue smoke came out and that was the end of it. RIP sony. good choice on the denon btw. REGARDS SNOWY1