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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Posted on Jan 02, 2017

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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

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 Players & Recorders

1 Answer

Front panel buttons and remote have stopped working.


Is the favorite channel menu a function that is normally accessed by a button on the remote?

If so, that button on the remote might be stuck.
If this is the case, the menu may at times pop up all by itself and other buttons on the remote and on the TV's front panel may not respond at all (it had happened on my remotes more than once).

Try to clean the remote control (the housing, rubber pad with knobs, circuit board) with ethyl alcohol, when you clean the housing, you should also clean the holes through which the buttons protrude, there might be some dirt that keeps the button stuck.

It may also be a stuck button on the TV front panel, so check these too.

Also, it could be something else, i just wrote the description of a problem and the solution which to me seemed most likely.

Hope you get it fixed.

regards

3rq8 (Triarcuate)

Jul 25, 2009 | Sony FD Trinitron WEGA KV-20FS100 20" TV

1 Answer

1998 buick lasbre climate control blower works intermitly


Hi not sure if this helps , but with my lesabre there is a ground under the carburetor that knocked out my A/C, horn , wipers and dash lights. part cost 3.00 . I just lead soldered to the clip and bolted it down and everything is working fine.

Dec 25, 2008 | 1998 Buick LeSabre

1 Answer

Intermittent, random, loud popping noises.


you have a problem with your amp. most likley the finals are passing dcv intermitently to the load.

May 28, 2008 | Audio Players & Recorders

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

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Popping sound from speaker when changing channels


This noise is normal with the cable box unless you set the cable box on HDMI sound

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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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Pic n pic


can get my pc n pic to work. it says can not view same channel please clarify problem in more detail thanks

Sep 09, 2007 | Mitsubishi WS-65615 65" TV

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