Question about Audio & Video Receivers

1 Answer

PEAVEY TRANSTUBE AUDITION 110. PLUG UNIT IN POWERS UP . SITS THERE AND HUMS LOUDLY. SPEAKER WORKS. plug guitar in can hear it faintly, push lead chanel button in , hum gets super loud. HUM IS IN PROPORTION TO VOLUME KNOB. OPENED UNIT UP TO SEE IF THERE IS ANY LOOSE WIRES OR GROUND STRAP PROBLEM.( there is not even a grouding plug on this unit or a ground lift switch) It ONLY HAS A 2 PRONG PLUG. CHECKED PC BOARD FOR BURN MARKS,LOOKED FOR VISABLE BAD ELECTRONIC COMPONENTS. CHECKED ALL INPUT JACKS WHERE THE GUITAR GOES IN . THEY ARE WORKING FINE.PHYSICAL CONDITION OF THIS AMP IS GREAT.PC BOARD IS SIMPLE .SOME RESISTORS, CAPS...BLA, BLA BLA...I THINK I HAVE IT DOWN TO 3 COMPONENTS THERES A TRIAC WITH 5 LEGS( 69af lm1875t)possibly spiked or bad. dont know the electrical value of this item. theres a super small IC plug in Prom chip on the board (e1a-695 a9716) possibly spiked or bad maby needs replacement. Then last... possibly an open winding in the transformer?? causing him or sending voltage where it isnt supose to go? this is a solid state unit No tubes...Any history of this amp in troubleshooting . what should i tackle first?any ideas? thanks Doug

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 4,234 Answers

There should be an 8 pin IC close to the input jack that will be marked 4558 or 4560. This is an Op-amp Ic that is the most likely cause of the problem. Replace that IC and report the results here.
Dan

Posted on May 28, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Speakers and headphones do not work


Sadly this could indicate that the main power amp has failed. You should try turning it up really loud with some music playing. If you can hear it very faint, then the main amp has failed. If you can hear hum, then the pre-amp might be the cause. The only other cause is that the headphone socket has broken, cutting off both speakers and headphones.

Aug 06, 2013 | Onkyo Audio & Video Receivers

1 Answer

I have an old late 70s Peavey PA-400 powered mixer. It's a workhorse that suddenly started doing the following: As soon as you turn it on - both speakers hum pretty loudly, and the back of the PA...


As these units get old, the solder joints can start to fail. Also, come of the components are getting tired. If you have no electronics experience, bring this to a servicer. I typically overhaul these units for about $100 plus parts. In most cases, the parts costis less than $20. These are solid units and you can probably get another 30 years out of it.

Part of the overhaul should be reseating all of the output transistors and replacing all of the heatsink compound as well as cleaning out all of the pots and switches.

Keep us posted.
Dan

Jul 14, 2008 | Audio & Video Receivers

2 Answers

I have a Boston Acoustics VR-500 Subwoofer with a problem. As soon as anything is plugged into the line level RCA jacks, the subwoofer produces a loud buzz/hum. I have tried connecting it to the subwoofer...


I'm thinking you have an open shield ground on the RCA input side. Connecting speaker inputs possibly restores the ground. Try connecting the high level inputs then disconnect the remote end of the cables (floating the grounds).

Then get out an ohmmeter and find that open circuitor or bad solder joint between RCA ground and real ground in the speaker's amplifier. Or.... if speaker ground kills the hum and you want to use RCA Line Level input to the sub, just connect one minus speaker output on your source amp to one minus on the sub's amp.

Mar 01, 2011 | Audio & Video Receivers

1 Answer

Hi, i just bought a gnx-3 guitar processor and it hums loudly.


Normal 0 false false false MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} Sounds like a bad cable or pickup. Set the volume to a level that you can tolerate. You may want to turn off the amp between each of these steps. Unplug the cable from the amp; if the hum does not go away you have problems with the amp. If it does then plug the cable into the amp and short the end that plugs into the instrument. If the hum goes away it is the pick system in the instrument, if not you have a bad cable.
Good Luck
Gilshultz

Mar 01, 2010 | Audio & Video Receivers

2 Answers

Pioneer Receiver SX-750: Getting a loud hum through the speakers


The hum you hear from the speakers and from the unit itself originate with 60hz AC power. They may not actually be related. Sometimes a transformer will hum slightly and unnoticeably. That you're getting a loud speaker hum says there is an electrical leak or a grounding issue somewhere.

Do all sources produce the hum or, say, just the phono? How about on headphones? Try rotating the AC plug. In those days they weren't keyed with one large blade as they are now.

May 17, 2009 | Pioneer Audio & Video Receivers

1 Answer

A couple of weeks after initial setup of my brand new Onkyo XT-SR606 receiver, I noticed a loud buzzing noise that starts up approximately 10 min after the receiver is turned on. The buzzing is definitely...


The "buzz" you hear is a power hum made by the power supply transformer. It's technically called "Lamination hum" caused by the revering of electrical current through the power supply transformer. In some cases the hum can vibrate the chassis causing other loose material to vibrate. If you can, go to your dealer and check to see if other units of this same type typically make a hum this loud, and if not, see if he can solve the problem for you.

Feb 27, 2009 | Onkyo TX-SR606 Receiver

1 Answer

The channel select button on my Peavey Transtube/Delta Blues footswitch won't work. When plugged into my Bandit 112, only the effects button was working. The pedal is brand new.


please try to apply a lubricant contact cleaner on select button and press it many times(you can get contact cleaner from radio shack near you)

Jul 22, 2008 | Audio & Video Receivers

1 Answer

Have a peavey-xr-600b peavey mixer amp. i get aloud hum and noise and cracking when plugging speaker jacks.


Hi chillin884

Not a good sign. Something has gone wrong with the output stages of your Peavey. It is not a good idea to continue plugging it in as damage may occur to your speakers. I suggest you take it to a decent music gear repair guy for a look see and give you a quote to repair These heads, like all Peavey gear, are pretty solid and worth repair. Sorry to be the bearer of bad news like this, good luck

regards
Graeme

Jul 15, 2008 | Audio & Video Receivers

1 Answer

I have peavey 212 heritage guitar amp footswitch plug broke. I have new one but i need wire diagram please include colors and speaker conection.Thank U very much


Call the Peavey Customer Service line (number available @ the Peavey site) and get the parts department to email you a schematics on the amp... it has the footswitch wiring on it. And it's free to do this.

Apr 27, 2008 | Audio & Video Receivers

2 Answers

A HUMMING Peavey Classic 30


I repaired a classic 50 recently and the problem was a bad solder connection on the main input jack. You may also want to have the tubes tested.

If the unit is over 20+ years have it recapped.

I do this stuff but Vermont might be to far.

Scott

Mar 17, 2008 | Audio & Video Receivers

Not finding what you are looking for?
Audio & Video Receivers Logo

Related Topics:

700 people viewed this question

Ask a Question

Usually answered in minutes!

Top Audio & Video Receivers Experts

Donald DCruz
Donald DCruz

Level 3 Expert

17129 Answers

The Knight
The Knight

Level 3 Expert

68368 Answers

yadayada
yadayada

Level 3 Expert

61249 Answers

Are you an Audio and Video Receiver Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...