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Help for a sharp 8989, no sound from right speaker


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#1 weboguy

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Posted 23 July 2017 - 07:44 AM

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



#2 docs

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Posted 23 July 2017 - 07:57 AM

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.

#3 weboguy

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Posted 23 July 2017 - 07:59 AM

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.....



#4 Rimmer36

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Posted 23 July 2017 - 08:03 AM

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



#5 weboguy

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Posted 23 July 2017 - 08:20 AM

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



#6 BoomboxLover48

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Posted 23 July 2017 - 08:21 AM

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. 



#7 weboguy

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Posted 23 July 2017 - 08:29 AM

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



#8 docs

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Posted 23 July 2017 - 08:32 AM

line in same?

#9 weboguy

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Posted 23 July 2017 - 08:33 AM

line in same?

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



#10 docs

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Posted 23 July 2017 - 08:35 AM

external speakers an option?

#11 weboguy

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Posted 23 July 2017 - 08:39 AM

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....



#12 docs

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Posted 23 July 2017 - 08:44 AM

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?

#13 weboguy

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Posted 23 July 2017 - 08:59 AM

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!!!



 

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!!!

 

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



 

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!!!



 

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!!!

 

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..................



#14 stevenrob

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Posted 23 July 2017 - 01:20 PM

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 ? 



#15 weboguy

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Posted 23 July 2017 - 05:06 PM

je suis français aussi

oui avec la radio et la cassette, même problème!!

par ailleurs le lecteur de k7 fonctionne parfaitement dans toutes ces fonctions

je n'ai pas branché d'autres haut parleurs car je n'y connais rien, je ne saurais pas désouder et resouder les trucs....

quand on tourne la balance a droite complètement, il y a du son mais tout bas, étouffé et grésillant

j'ai mis du nettoyant contact un peu partout, bien laissé sécher et tout remonté et c'est pareil...

c'est dommage le poste est superbe et je l'aimebeaucoup^je suis vraiment embété...

quant au service manual disons que c'est du charabia pour moi lol je n'y pige que dalle...!!!



#16 weboguy

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Posted 23 July 2017 - 06:23 PM

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 attaché au haut parleur droit n'était plus dessus et se baladait dans le boombox quand je l'ai reçu...Je l'ai donc remis en place avec de la glu

Est ce la cause du problème?

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!!



#17 jimmyjimmy19702010

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Posted 23 July 2017 - 10:44 PM

Sounds like that right speaker might be stuffed.

#18 Northerner

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Posted 24 July 2017 - 12:28 AM

D'oh

#19 weboguy

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Posted 26 July 2017 - 02:00 AM

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!!!



#20 Lasonic TRC-920

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Posted 26 July 2017 - 08:01 AM

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 attaché au haut parleur droit n'était plus dessus et se baladait dans le boombox quand je l'ai reçu...Je l'ai donc remis en place avec de la glu

Est ce la cause du problème?

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



D'oh

:-D



#21 MyOhMy

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Posted 26 July 2017 - 08:10 AM

 

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 attaché au haut parleur droit n'était plus dessus et se baladait dans le boombox quand je l'ai reçu...Je l'ai donc remis en place avec de la glu

Est ce la cause du problème?

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:

 

CLASSIC!   :yes:  :lol:



#22 weboguy

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Posted 26 July 2017 - 10:03 AM

thanks everyone



#23 weboguy

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Posted 05 August 2017 - 11:05 AM

Thanks to Geoff who sent me 2 speakers from Japan, my beloved Sharp gf8989h is now fully working and blasting great tape music!

Thanks Geoff !!!

cheers



#24 Northerner

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Posted 05 August 2017 - 12:50 PM

Awesome!

#25 im_alan_partridge

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Posted 05 August 2017 - 01:33 PM

Glad you got it sorted.

 

For reference, does anybody know if other Sharp models shared the same speakers as the 8989?



#26 weboguy

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Posted 05 August 2017 - 05:20 PM

SHARP GF 575 are the exact same



#27 Northerner

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Posted 06 August 2017 - 01:04 AM

Yeh I think so. I've got an 8989 in the pile to do so I'll check it out

#28 docs

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Posted 06 August 2017 - 06:34 AM

Are the 8989 speakers white with a chrome cap like in the gf1000?

I think they are the same speakers?



#29 weboguy

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Posted 06 August 2017 - 08:02 AM

Attached File  IMG_0421.JPG   80.57K   3 downloads



Are the 8989 speakers white with a chrome cap like in the gf1000?

I think they are the same speakers?

they are not white they are brown