Question about Optimus STAV-3770 Receiver

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1 channel w/ intermitent cracking & popping

1 front channel pops & not sure if I need to ground receiver or front controls not clean or something weak and going out

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If it happens more when it warms up, It probably needs two transistors on the amp board. not the main output transistors but the pre driver ones.

Posted on Jan 11, 2009

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No sound from Surround Back Right (SBR).


Bad wire, bad speaker or bad channel. Disconnect the wire from the amp. Using a 1.5v battery touch the wires to the battery briefly. You should get a pop from the speaker. If not get a different piece of wire and use it instead of the regular wire. If still no pop then the speaker is bad.

Aug 17, 2016 | Pioneer VSX921K 71 Channels Receiver

2 Answers

Cracking and poping with Yamaha surround sound system


Try put a ground line from any metal of your stuff to the any metal direct to the ground. these eliminate noise of the speaker.

Jan 03, 2008 | Pioneer VSX-54TX Receiver

1 Answer

Centre channel pops


Popping is usually a sign that the output transistor on the amp (center channel) has blown - quite expensive to repair. eBay is good for picking up cheap but fully working receivers

Jan 16, 2014 | Kenwood KRF-V5100D

1 Answer

You were helping me with my receiver(sony str-de605) last june and i have some other questions if you dont mind.


Hi,sorry for delayed reply.Can I have the main question and the definition of problem again? because I do not remember..sorry..Than I can try to help..Many thanks

Dec 07, 2011 | Sony STR-DE605 Receiver

1 Answer

Speaker keep popping in & out on one channel


This could be for one of several reasons.. Try to work through the system to diagnose where the problem lies. Here are a few things to try.
  1. Do you get the same fault on headphones? If yes the problem is the receiver or sound source
  2. Swap speaker's over - does the problem stay on the same channel or does it move across? If it moves it is a problem with the speaker - check cables, plugs, quality of connection at both ends. Try wiggling cables along the length to see if cracked cores.
  3. Check plugs on inputs make sure they are not loose. With RCA (phono plugs) rotate them backwards and forwards a bit in the sockets to clean contacts
  4. Try using a different input source and input plug sockets (c.d. IPOD, turntable, TV), to make sure the problem is not with the source.
  5. If none of these solve the problem it may be dirty controls on your amplifier section. Rotate volume and tone control knobs vigorously in both directions several times to clean contacts. If this produces a crackling noise you have located the problem.
If none of this solves it then it is probably a faulty electrical component - take to competent repairer

Feb 25, 2011 | Audio & Video Receivers

1 Answer

Because my rear speakers are popping and crackling during DTS output, I believe my settings of bass or treble might be overloading my speakers... should I set the rear speakers to "flat"? should...


Cracks and pops are dangerous. Can you tell if they might be circuit overloads or maybe digital decoding errors?

Are you routing bass to small speakers. THAT would definitely have audible problems. Define all of your speakers Large vs Small based on their bass-handling capacity.

ONLY DTS? Probably NOT the speakers or amps. How many sources are involved? Could be with the source or cabling.

Does it happen at low volumes, too? Then it would probably be digital in origin.

Do the indicators various digital surround mode indicators flicker or turn off when the pops appear?

As for the rest of your questions, I'd set everything at flat and start all over. If you're maxxing out any settings, something is wrong.

Jan 03, 2011 | JVC RX-7000V Receiver

1 Answer

I have a nad 7600 receiver. it is cracking and popping loudly whenever you try to adjust the volume. What could be the problem


There are a couple of possibilities here. The crackling is likely to be a dirty control. Spraying it out with electronics switch cleaner that contains a lubricant should resolve that. The popping usually indicates a build up of DC current between the amp stages. This can happen because of defective coupling caps. That may take a little more detective work. Try cleaning the controls first. If that fails to reolve the entire problem, update this and we'll start looking at circuit components.

Dan

Aug 21, 2009 | NAD Audio & Video Receivers

2 Answers

Onkyo TX-SR304S 5.1- Popping Issue


I called Onkyo support regarding the issue with the clicking/popping noise and they said that that's normal when you change channels that are digital. They don't seem to think that it's a defect.

Dec 27, 2007 | Onkyo TX-SR303 Receiver

5 Answers

Marantz SR18-no sound


I have worked exclusivly on marantz recievers, for the last seven years, the loud 'pop' you heard, and smoke, was 90% that one of the amplifier channels, on the amp block, has blown, and consiquently the unit stays in protect mode. It will power up, and decode audio, and even show an f.m. stereo on the tuner, but you won't get the 'happy click' of the protection relays, until the channel is repaired. also replace the 5fd memory capacitor on the front micro board behind the front panel. If you have someone repair the channel, make sure that the tech resolders all of the connections on the molex connectors on the amp block. there are 10 of them, five male and five female, The bad solder on these are what caused the problem in the first place.

Nov 29, 2007 | Marantz SR-18EX Receiver

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