Help for a sharp 8989, no sound from right speaker

weboguy · Jul 23, 2017

Hi everyone

I have a great Sharp GF 8989, but the sound is not coming from right speaker, just left
I opened it and cleaned all contacts and a quick check showed everything is connected as it should...
When I use the headphones socket the sound is on both channels, perfect stereo
When I turn the balance knnob full on the right, there is sound but very low, muffled and no bass
Can someone help?
Thanks

docs · Jul 23, 2017

Try and source the service manual, take a look at the block diagram, could help point you in the right direction as its possible there is an issue in the preamp phase.

weboguy · Jul 23, 2017

docs said:
Try and source the service manual, take a look at the block diagram, could help point you in the right direction as its possible there is an issue in the preamp phase.

Thanks but I am no specialist and I don't understand anything in those manuals.....

Radio raheem · Jul 23, 2017

The speaker is probbably blown, this is a common issue with sharps, try it on headphones and see if both channels work

weboguy · Jul 23, 2017

Rimmer36 said:
The speaker is probbably blown, this is a common issue with sharps, try it on headphones and see if both channels work

Both speakers look perfect and similar, the wires and connections are good
On the headphones yes the sound comes in both channels and perfect stereo

BoomboxLover48 · Jul 23, 2017

weboguy said:
Hi everyone

I have a great Sharp GF 8989, but the sound is not coming from right speaker, just left
I opened it and cleaned all contacts and a quick check showed everything is connected as it should...
When I use the headphones socket the sound is on both channels, perfect stereo
When I turn the balance knnob full on the right, there is sound but very low, muffled and no bass
Can someone help?
Thanks

Clean the record bar switch and see how it sounds. Switch the speakers and see if there is a problem with the speaker.

weboguy · Jul 23, 2017

what is it the record bar switch ?

how do I switch the speakers? I have nothing to desolder / resolder them sorry I have nothing to do this

I precise that both with radio and tape playing it's the same, no sound (or barely) from right speaker

docs · Jul 23, 2017

line in same?

weboguy · Jul 23, 2017

docs said:
line in same?

there is no line in on this model, it's a SHARP GF 8989 H

docs · Jul 23, 2017

external speakers an option?

weboguy · Jul 23, 2017

docs said:
external speakers an option?

no lol....
I have found the service manual, and block diagram...
Well this is chinese to me!!!!!!!!!!!!!!!!!
There is a thing called "stereo switch", could it be this?
But of course I don't know where it is and how it looks
Sorry I surely sound stupid but again I am completely zero in electronics
It's a shame because the boombox is great cosmetically and sounds great, just not sound on the right
For a guy like you all here, surely is something you would resolve in a minute....

docs · Jul 23, 2017

put a blank tape in, put it in radio mode, press record and stop a couple of times and repeat for a while, does it affect the low channel at all?

weboguy · Jul 23, 2017

docs said:
put a blank tape in, put it in radio mode, press record and stop a couple of times and repeat for a while, does it affect the low channel at all?

ok wait I do this and I tell you after
thanks for helping me that's nice from you guys!!!

weboguy said:
put a blank tape in, put it in radio mode, press record and stop a couple of times and repeat for a while, does it affect the low channel at all?

Click to expand...

ok wait I do this and I tell you after
thanks for helping me that's nice from you guys!!!

ok done it 20 times...it lowers the sound then goes normal volume again, but, still, no sound on the right......................... :bang:

weboguy said:
put a blank tape in, put it in radio mode, press record and stop a couple of times and repeat for a while, does it affect the low channel at all?

Click to expand...

ok wait I do this and I tell you after
thanks for helping me that's nice from you guys!!!

weboguy said:

put a blank tape in, put it in radio mode, press record and stop a couple of times and repeat for a while, does it affect the low channel at all?

Click to expand...

ok wait I do this and I tell you after
thanks for helping me that's nice from you guys!!!

ok done it 20 times...it lowers the sound then goes normal volume again, but, still, no sound on the right......................... :bang:

listen : when I play my recording, there is no sound at all!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! or just very very low on left channel..................

stevenrob · Jul 23, 2017

Do you have clean all the pots and the switch record/play? The same problem with tape or radio ? Do you have try to plug the other speaker ?

weboguy · Jul 23, 2017

je suis franÃ§ais aussi
oui avec la radio et la cassette, mÃªme problÃ¨me!!
par ailleurs le lecteur de k7 fonctionne parfaitement dans toutes ces fonctions
je n'ai pas branchÃ© d'autres haut parleurs car je n'y connais rien, je ne saurais pas dÃ©souder et resouder les trucs....
quand on tourne la balance a droite complÃ¨tement, il y a du son mais tout bas, Ã©touffÃ© et grÃ©sillant
j'ai mis du nettoyant contact un peu partout, bien laissÃ© sÃ©cher et tout remontÃ© et c'est pareil...
c'est dommage le poste est superbe et je l'aimebeaucoup^je suis vraiment embÃ©tÃ©...
quant au service manual disons que c'est du charabia pour moi lol je n'y pige que dalle...!!!

weboguy · Jul 23, 2017

Oh everyone : I forgot to say, just maybe I should have told first thing lol!!! :
When I received the box, the magnet from the right speaker, the non sounding one, was not more attached to the speaker and was stuck inside the box...
So I glued it back on it..
Can it be the reason why there is no sound?
Sorry I forgotto say that....
L'aimant qui est attachÃ© au haut parleur droit n'Ã©tait plus dessus et se baladait dans le boombox quand je l'ai reÃ§u...Je l'ai donc remis en place avec de la glu
Est ce la cause du problÃ¨me?
If this is, I think I can find an old 8989 just to replace the speaker, I can do this
Si oui, je pense pouvoir trouver un vieux 8989 pas cher, juste pour remplacer ce haut parleur, je pense savoir le faire, juste 4 vis et 4 soudures
Thanks!
Merci!!

jimmyjimmy19702010 · Jul 23, 2017

Sounds like that right speaker might be stuffed.

Northerner · Jul 24, 2017

weboguy · Jul 26, 2017

hi again
well I tried to plug another speaker instead of the right and..it works!!!!!!!!!!!!!!!

so I just have to change the speaker and that's fine
not easy to find one, 16cm, 3.2 ohms, 4/8 watts or maybe find an old gf8989 just to grab the speaker
if anyone has one pm me please
thanks!!!

Lasonic TRC-920 · Jul 26, 2017

weboguy said:
Oh everyone : I forgot to say, just maybe I should have told first thing lol!!! :
When I received the box, the magnet from the right speaker, the non sounding one, was not more attached to the speaker and was stuck inside the box...
So I glued it back on it..
Can it be the reason why there is no sound?
Sorry I forgotto say that....
L'aimant qui est attachÃ© au haut parleur droit n'Ã©tait plus dessus et se baladait dans le boombox quand je l'ai reÃ§u...Je l'ai donc remis en place avec de la glu
Est ce la cause du problÃ¨me?
If this is, I think I can find an old 8989 just to replace the speaker, I can do this
Si oui, je pense pouvoir trouver un vieux 8989 pas cher, juste pour remplacer ce haut parleur, je pense savoir le faire, juste 4 vis et 4 soudures
Thanks!
Merci!!

Kind of valuable information there :lol:

Glad you were able to figure it out. Post up in the wanted section that your looking for a speaker, someone surely has one

Northerner said:
D'oh

Help for a sharp 8989, no sound from right speaker

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