SANYO M6900 Mini Boombox Bluetooth Mod

I like this type of the small and cute one. It only has FM stereo/AM radio, one cassette deck. The beauty of the simpleness.
In order to make this one as the Bluetooth speaker, this time I tried a different method to remove the ground-loop noise.
For the Bluetooth mod, first I need to find the signal input point, then I need to reduce the power source to 5V. And finally I need to remove the ground-loop noise.
So far I used MPOW ground-loop noise eliminator between the Bluetooth receiver and signal input point. This time I used the DC isolated converter along with 47uH inductor + 4.7uf capacitor. It simple, but worked well. I learned this method from other youtuber video.
Here is a drawing for the wiring. (I misspelled "Lenear", correct word is "Linear".)
goo.gl/u5f9Hn
Bluetooth 4.0 or above has the strong signal that will make a distortion to this type of small one. So I needed to adjust the Bluetooth signal input level by resistor. I used slide potentiometer to adjust the input level, then I replaced it with resistors for L and R. No need for the ground.
• The BT input signal ad...
---------------------------------
The lists for the parts.
Bluetooth receiver 4.0
amzn.to/2Qn1feL
4.7uf ceramic multilayer monolythic NP capacitors
Amazon
amzn.to/2TPBfaX
Ebay
goo.gl/6ieX4F
47uH Fixed Inductor
Amazon
amzn.to/2r85vAT
Ebay
goo.gl/1FZWjX
Comidox 5PCS B0505S-1W DC-DC 5V Power Supply Module 4 Pin Isolated converter
amzn.to/2TLqczs
6 pins toggle switch
amzn.to/2PYtsZX
resistor kit
amzn.to/2KCbtCM
Step-Down Linear Voltage Regulator Module
amzn.to/2TRjbNt
Enjoy!
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Donation welcome!
I appreciate if you fund me for the new camcorder and my next youtube projects. Thanks. Teddy Hashee
www.paypal.me/teddyhashee358

[@eatshitgoogle]

What a cute little boombox. I always liked Sanyo’s style. Awesome job as always.

[@teddyhashee]

I like this mini boombox style. Thank you for your compliment.

[@engelbertchua1846]

Amazing! Your patience is indescribable!

[@teddyhashee]

Thank you for your compliment!

[@toneyisaiah408]

I've watched stereo systems being repaired. but when it comes boomboxes & radios, People throw them away.

[@fransicorivas3141]

Another great restoration Teddy. Simply awesome

[@teddyhashee]

Thank you for your compliment!

[@marshallm967]

Thank you for your answer. Your attention to detail is unquestionable. I will follow your lead and "if it isn't broke don't fixit" philosophy with regards to the caps. Very time consuming and potentially disastrous!

[@teddyhashee]

Hope you will be able to restore your precious boombox!

[@erwindewit4073]

I really wish I could do that to this level as well! You should be really proud of what you achieve! This looks great once more!

[@teddyhashee]

Thank you for your compliment on my work! you can do it too!

[@erwindewit4073]

@@teddyhashee Well, I'm about to buy a Hitachi TRK-W24E, watch your videos over and over again, and try it myself :) Let's see how well I do ;)

[@Jammerkiller]

Another one saved from the scrap heap!! Great Job Teddy!.

[@teddyhashee]

Thank you for your compliment on my work!

[@ralphreinhardt6020]

Another job very well done sir! You are a credit to the art on boomboxery. Keep up the good work.👍👍

[@ralphreinhardt6020]

It should say art of boomboxery.

[@teddyhashee]

Thank you for your compliment. I am flattered.

[@kongmengyang]

This one is still with you I like it very much

[@teddyhashee]

This one was a giveaway for the 7K subs.

[@alinsorin5237]

Nice boombox!😀

[@RegiPavan]

Awesome project, congrats!!!

[@teddyhashee]

Thank you for your compliment on my project.

[@Georges-MILLION]

Bravo Teddy ! Un de plus !!! Bravo Teddy ! One more !!!

[@teddyhashee]

Thank you for your compliment!

[@mesutisk751]

Eline sağlık sayende tamir yapmayı öğrendik

[@teddyhashee]

Thank you for your comment!

[@necoisidois7570]

You are awesome my friend!

[@teddyhashee]

Thank you my friend!

[@rodrigo777mo]

Great job!

[@teddyhashee]

Thank you for your compliment on my work!

[@toneyisaiah408]

I you own vintage radio equipment, treasure it!

[@teddyhashee]

Thank you!

[@Oleg_Kazanskiy]

Спасибо, очень понравилось!

[@teddyhashee]

Thank you for your compliment on my work!

[@serhiisytnyk1096]

Very good job ) Respect

[@teddyhashee]

Thank you for your compliment!

[@serhiisytnyk1096]

Your's videos really good ) Thanks

[@marshallm967]

Sir, you are an inspiration! I am now trying my hand at it. Learning is costly though(failures). One question, I notice you don't appear to mess with the Electrolytic Caps..many would have to be out of spec, why do you not replace them?

[@teddyhashee]

Hi, Michael. Thank you for the comment and question. All I do is complete cleaning the boombox including the contact of the pods and variety of switches. But you can see clearly that only the cleaning up the dirty pods and switches will revive the boombox sounds. If there is the huge difference between the left and right speaker sound, I may need to replace some of the caps and other electronic parts for its best performance. But mostly what I found was they were still in good playing condition. So that is the reason I did not mess up with caps and others.

[@nextsandal7673]

Best Master!!!

[@teddyhashee]

Thank you for your compliment!

[@trabelssiramzi8408]

very very very good teddy

[@teddyhashee]

Thank you for your compliment on my work!

[@eduardg5619]

Really great job, like it. I have some question, maybe you can answer them? 1)You are saying, that you are using a DC isolated converter. Would it be also possible to use a module, which can stepdown voltage and is isolated at once? 2) What is the purpose for 47uH inductor + 4.7uf capacitor? Is this circuit usable only for your radio or in general? I have a JVC RV NB1 and would like to add an internetradio to it. Internetradio needs 5V with max. 1.2A. So could I use the 47uH inductor + 4.7uf capacitor circuit also for my case? Thank you

[@teddyhashee]

The inductor and capacitor are for reducing the output ripple effect. You can use step down module then DC-DC isolator, it should work. All you need to have is isolated 5 v power supply to your internetradio unit. The reason I use DC-DC isolator is removing the noise from ground-loop.

[@makjac46]

I agree with Engelbert

[@teddyhashee]

Thank you Tom!

[@engelbertchua1846]

😁

[@adrianlee314]

dope

[@teddyhashee]

Thank you!

[@driver_cl]

The patience and dedication are increíble. Where are you from ?

[@teddyhashee]

Thank you for your compliment on my work. I am located in USA, originally from Japan.

[@driver_cl]

@@teddyhashee Aah.. that explains the eclectic audio when testing the tuner and the mixed papers. I was really curious. Thanks !

[@toneyisaiah408]

My first boombox was an Emerson.

[@teddyhashee]

great!

[@freitassilva3015]

Trabalho perfeito

[@teddyhashee]

Thank you for your compliment on my work!

[@dielrodrigues1428]

Olá Freitas Silva você sabe de alguém que faça isso aqui no Brasil ?

[@dielrodrigues1428]

you have video with the sanyo model m7770k

[@wahyauwaiwah5363]

三洋舊式收音機 播錄音帶音響很好聽

[@TheOneAndOnlyTBash]

Is this something you do this professionally or as a hobby?

[@teddyhashee]

Between the hobby and professionally work.

[@kongmengyang]

How much each one do you sell brother

[@DUOCAPRICORNS]

i got the same sanyo a couple of days ago. it needs some service

[@teddyhashee]

This one is easy to clean inside and replacing the belts, etc.. Go for it!

[@DUOCAPRICORNS]

@@teddyhashee thanx man, i gave to check it to my friend, i am not able to do things like that :)

[@necoisidois7570]

14:25 What are you doing? What is this sensor?

[@teddyhashee]

That's demagnetizer. amzn.to/2DZmQna

[@MrGaming17]

Elle est mignone la radio

[@teddyhashee]

Yes she is.

[@MrGaming17]

Moi j'adore les radios surtout vintages .

[@teddyhashee]

I am using google translator when I can not read the different language.

[@MrGaming17]

Ok

[@biswanathdey8350]

I required one syno.

[@user-ou3gq1kd1i]

и очень даже просто

[@toneyisaiah408]

People think that large boomboxes can't be repaired.

[@teddyhashee]

Thank you for the comment!

[@toneyisaiah408]

It didn't have a pause button.

[@teddyhashee]

Thank you for the info

[@madrugadafriamadrugada3927]

18:07 Nome da music?

[@teddyhashee]

It's from demonstration tape (Hitachi original Battle of Jerico

[@madrugadafriamadrugada3927]

@@teddyhashee Obrigado. 👍

[@santiagoluque1343]

No sé entiende lo que está haciendo

[@MOKSIMM]

Руки бы отрубил и себе пришил. Уж больно хороши руки. Плохо только что без головы бесполезны. Ай! Да чёрт с ними пусть остаются. Остается только смотреть. Не без наслаждения, между прочим.

[@teddyhashee]

Thanks for the comment!

[@namjanamja747]

I have a Sanyo rice cooker. Oh, I'm an asian 🙄

[@josedejesusmatos2141]

E

[@teddyhashee]

Thank you for the comment.

[@doglasgreendy7977]

Bluetooth is crap nor does it have audio equalizer right from the way you take the originality of the old stereo and the sanyo brand is very good and has high fidelity quality now bluetooth is just imitation of radio goes in good I did not like it got a crap

[@teddyhashee]

Hi, Douglas. Thank you for your comment and many advise!

[@toneyisaiah408]

I wasn't fancy at all.

[@teddyhashee]

Thank you