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Repairing/restoring a Sharp 5P-37G

Sharp battery 5P-37G Battery

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#1 Alex the great

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Posted 16 August 2014 - 08:17 AM

I just got my hands on a Sharp 5P-37G wich I'm planing to fix. :thumbsup:

 

But it has a couple of problems

 

- The batteries are not working, I dont know why. No problem when using a cable, but batteries does nothing.

- The Aux/mic intake does not have any base, wich works when using radio,

- looking to get new subwoffers since the old ones dont sound as good as they should.

- One of the tape cyliders dont spin, causing the tapes to not work

 

Getting tapes to work on it is not really a priority but would be a nice bonus.

 

Does anyone have a place where i can get hold on any manuals for my box or have any other tips that i can use when fixing it?

 

Not looking for any new colour or getting a lsd TV or anything. Wanna keep it oldschool. except or the sound.



#2 k2j

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Posted 16 August 2014 - 09:12 AM

Congrats.  That's a beast of a boombox!! :thumbsup:

 

Regarding the batterys:  Check the corrosion of the battery terminals.  Sometimes just spinning or rotating the batteries while placed in the boombox will help create better continutity and fix the issue.



#3 Alex the great

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Posted 16 August 2014 - 11:54 AM

thanks, corrotion was the problem it seems. Altho spinnin' the battery aint helping. think its a little to much for that. Gonna get some corrotion removial tomorow



#4 superlew

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Posted 17 August 2014 - 05:28 AM

thanks, corrotion was the problem it seems. Altho spinnin' the battery aint helping. think its a little to much for that. Gonna get some corrotion removial tomorow

 

Battery corrosion can travel up the wires from the terminals to the power supply. Take a look at them and see if they're green. If they look bad, solder in some new ones. Also, clean the switch in the A.C. power socket. That should get you going "portable."



#5 Alberto

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Posted 17 August 2014 - 07:14 AM

I use a mixture of baking soda & white vinegar to clean corroded battery terminals. :yes:



#6 Alex the great

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Posted 17 August 2014 - 10:07 AM

Attached File  holes.JPG   136.13K   24 downloads

 

 

Update:

 

I opended the box up and used sandpaper to get the layer of corrotion of. 

 

That solved the problem, and it's now working as is should with batteries.  :thumbsup:

 
 
Another question, What kind of input does these holes do?
 
Can those to work with Aux with the right cabels?

 



#7 Beosystem10

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Posted 17 August 2014 - 05:00 PM

Not directly, no, they're higher in sensitivity than an aux input. The separate earth clamp beside them is a clue to their being Moving Magnet cartridge inputs for playing records from a connected turntable but don't despair; devices are available that apply the appropriate eq curve and reduce the output from the higher line level signal so that you could then connect your mp3 player, CD player or whatever.

 

Search the forum for "Attenuator", that'll throw up plenty of information about what's needed. :-)



#8 k2j

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Posted 17 August 2014 - 05:19 PM

Yep, MCM has cheap phono attenuators and they work pretty darn good for the price!

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#9 Alex the great

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Posted 22 August 2014 - 04:19 AM

Checked the MCM store out and found a fitting phono attenuator, 8 dollars seems really be worth the monney.
Still waiting on answers from mcm about shipping costs tho, sinse i live in sweden.

Yet another problem solved cuz of you guys. This site is fookin' amazing

#10 k2j

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Posted 22 August 2014 - 08:18 AM

Checked the MCM store out and found a fitting phono attenuator, 8 dollars seems really be worth the monney.
Still waiting on answers from mcm about shipping costs tho, sinse i live in sweden.

Yet another problem solved cuz of you guys. This site is farkin' amazing

:clap: :rock: :rock: :-)