JVC M70 Restoration and Bluetooth Mod

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This is a JVC M70. So far I have restored 3 of them. This one came to me recently and it had no powering up issue. The radio had no sound, but the cassette reels spun when the buttons were pressed. It was a very strange and interesting condition.
I started with troubleshooting a power failure issue. Checking from the power transformer, replacing a fuse, clean all switches with contact cleaner. At some point I tried playing music with AUX in, and the sound came out from the speakers. However, even the volume was set up to the max, it was so small sound. Anyway, after I cleaned up all switches and controllers, I found out that pressing cassette button would send power to the amp and radio sound was on. In this situation, when I turn ON the main power switch, the radio sound went off. Very interesting. So I guessed that cassette deck power switch is only working switch, and the main power switch had something to do with this power frailer mystery. After cleaning the power switch witch was "leaf type switch", this mysterious power failure issue disappeared.
The next thing I found was that the cassette deck lost some parts. I ordered same cassette deck from Korea as a replacement. The arrived cassette deck's play/record head condition was really bad, so I used only necessary parts of it. After replacing parts and tested cassette deck, the auto stop feature did not work. So again, I replaced whole button mechanism. This time everything worked perfectly. In the film, I took apart cassette deck 2 times, however, to tell you the truth, I needed 5 times re-do for complete the cassette repair work. LOL.
I like M70, it is well built and well balanced machine. Enjoy the film.
Demonstration tape (Hitachi original)
1) Racing sound dynamics
2) Battle of Jerico
======================================
Special thanks to Pedro
The owner of this boombox is the boombox collector Pedro..
======================================
Donation welcome!
If you like my videos and would like to donate to me for my future video making work, I appreciate your kindness. Here are coin wallets and Paypal address. Thank you in advance.
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Опубликовано:

23 июл 2024

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Комментарии : 162

@vasilesandu9743 4 месяца назад

Pentru mine esti cel mai bun restaurator de electonice vintage ever!

@ametaljag 6 лет назад

Wow, quite an elaborate job. And a beautiful machine it is indeed. Love the bluetooth mod with backlight.

@teddyhashee 6 лет назад

Hi, Albert. Long time no see! Thank you for the compliment on my work.

@pedrofeliciano6211 6 лет назад

I don’t know how you do, you really are the best. Thank you so much for restoring my Sharp M70

@teddyhashee 6 лет назад

You are welcome, Pedro. I was lucky when I found out the reason why the boombox did not power on. Anyway, keep bringing your beauties, I will take care of them for you! PS: this is not Sharp, but JVC. The Sharp is on working right now. LOL

@fransicorivas3141 6 лет назад

Another great restoration Teddy. Amazing on how you fix them. Keep up the great work

@teddyhashee 6 лет назад

Thank you Fransico for your compliment on my work.

@andyb7339 4 года назад

Very good when you know what you're doing. Great job!

@Bender24k 4 года назад

New boombox fan - thanks for sharing these valuable images & details. You are very patient - kudos!

@teddyhashee 4 года назад

Thank you for your compliment on my work!

@cristian.b1015 Год назад

Dicen que cada 1000 años nace un sujeto que es capas de lograr cosas increibles, definitivamente eres ese sujeto

@kory1113 6 лет назад

thank you... No more masters like you. you are very patient. your perfect master

@teddyhashee 6 лет назад

Thank you for your compliment on my work!

@victorashburn2527 5 лет назад

@@teddyhashee how much you restore boombox's for?

@MrBoogaloo86 5 лет назад

Great Work! It's a wonderful sounding boombox; I remember them.

@teddyhashee 5 лет назад

Thank you for your compliment!

@fender1000100 3 года назад

@@teddyhashee You seem to be genius at restoring these classic early 80s boomboxes. How much would you charge to replace the tape head in my SHARP GF9191?

@miguelque9102 6 лет назад

Glad to see another restoration video 😊

@teddyhashee 6 лет назад

Hi, Miguel. Thank you for your compliment on my work.

@calvinwilliamson3041 5 лет назад

Thank you, Master Teacher of radios!

@teddyhashee 5 лет назад

Thank you for your compliment on my work!

@faisalsattarshergawnker9695 6 лет назад

Very nice Sir, your efforts are really admirable.

@teddyhashee 6 лет назад

Thank you Faisal for your compliment!

@daverodjesian2857 6 лет назад

See, THIS is a boombox that is worth restoring!

@teddyhashee 6 лет назад

Thank you for the comment.

@user-td1pt4bd9c 6 лет назад

greetings from Russia I really like what you're doing 👍

@teddyhashee 6 лет назад

Thank you for your compliment on my work.

@UrOpinionsSucc 4 года назад

I've never had a boombox before. But always wanted a Lasonic TRC-931. But never found one. Regardless i'm getting a modern retro-style boombox that'll make me happy regardless. Great vid man! These things are coming back!

@teddyhashee 4 года назад

Hi, Menace. Thank you for the comment and sharing your memory of the old-school boombox. Great that you are going to get retro-style boombox. Enjoy your music!

@vasilesandu9743 4 месяца назад

Good work Teddy!The best!

@Giondenver 4 года назад

this is a AWESOME boombox...... how in the world do you remember where everything goes once you had taken it apart ???? Talent you have !!

@teddyhashee 4 года назад

Thank you. And I answered how to putting back together or how I remember question on the other thread.

@RoughJustice2k18 4 года назад

Teddy takes lots of pictures before he disassembles these boomboxes as a helpful reference so once a repair/restore is done, it makes it easier for him to re-assemble them and ensure everything is in the right place, working correctly. He also makes notes as he goes; this is handy when a service manual isn't available.

@panda69144ify 4 года назад

35 h. 37 min. ??? Wow! Filigree work! 👍👍👍👍👍👏💪💃

@teddyhashee 4 года назад

Thank you for your compliment.

@amnril 3 года назад

Excellent restoration. The quality of those components are excellent. Just look at the rubbish in today’s excuse for boom boxes

@ovabiciman 4 года назад

Que genial trabajo!! Saludos desde Argentina!

@teddyhashee 4 года назад

Thank you for your compliment on my work!

@damusicianstrikesback5337 6 лет назад

Nice work! I had the same problem with the power switch on my 1985 GE boombox.

@teddyhashee 6 лет назад

Thank you for your compliment on my work. Great to hear you solved power switch issue. :-)

@damusicianstrikesback5337 6 лет назад

Teddy Hashee I have get it another spray. It’s acting up again. Now I have to turn it off and on again to get it working. I may try another spray. I was using CRC electronic cleaner.

@teddyhashee 6 лет назад

If the cleaning won't work, you want to replace leaf switch since it has tendency not to work easily after long year.

@damusicianstrikesback5337 6 лет назад

Teddy Hashee It’s one of those cased switches. I had to spray in the gap between the shaft and casing then work the switch back and forth. I may have to try to get it apart to get to the contacts.

@StarwalkerProject 6 лет назад

Teddy, you are a legend! I really find it funny that I can sit and watch your videos like it's a suspense thriller! I've watched ALL of your boombox video and look forward to the next ones. I read the comments too to learn about some of the details that I don't catch in the videos. There's one thing that I'm interested to know. What is it that you are polishing the center parts of the speakers with? You get them looking so shiny!

@teddyhashee 6 лет назад

Thank you for your compliment on my work. About center parts of the speaker, I used rubbing alcohol, sometimes I use goo gone. Both work good, goo gone is much safer for any polish work than alcohol though. Thanks!

@StarwalkerProject 6 лет назад

Thanks Teddy! I appreciate your reply. I was thinking that it was something like that. I don't want to damage my speakers. I'm trying to do a "Teddy Hashee" on my $2.45 GE 3-5286A. You're inspiring me to clean up these old monsters and get them purring again :) Thank you Sensei!

@teddyhashee 6 лет назад

It will be a fun for you to restore GE boombox. By the way, you know the word "Sensei". Great!

@ZhuzikBer 5 лет назад

So much work! But worth it. Wow!

@teddyhashee 5 лет назад

Thank you for your compliment on my work!

@johnvalyo9417 5 лет назад

Great job dude!

@teddyhashee 5 лет назад

Thank you for your compliment!

@nathegotule4666 3 года назад

Boss,,ghetto blaster King..... Yur da koolest.... ✋👍😁😁😁😁😁🍺🍺 Peace n kindness down under Sydney australia

@k333ization 6 лет назад

years ago I had a radio of the kind of a strange brand, which was missing the switching of the radio function. Basically, the radio only worked when the cassette recorder was on.

@teddyhashee 6 лет назад

So they removed the selection switch and used cassette power switch for the power the amp. Interesting.

@daveboogie1 3 года назад

really like your vids, what bluetooth device would you recommend for putting inside?

@junior_felman 2 года назад

Nice repair and cleaning job. The product you give to the front, is it paint polish?

@sonjaberry-perez6969 Год назад

Are you still fixing and making boomboxs look brand new again

@k333ization 5 лет назад

years ago I received as a gift a radio of the kind in which the radio worked only if the PLAY button on the recorder was pressed.

@teddyhashee 5 лет назад

Your boombox has a power switch problem. Either function switch ( you select tape, radio, etc..) or main power switch. As you are now using the cassette deck button for the main power switch, that means power supply as well as amp board, radio tuner board are all OK. Probably easy fix.

@valentonto 6 лет назад

Can you make a video showing the audio equipment that you normally use? And explaining everything

@teddyhashee 6 лет назад

Thank you Valentine for your comment. I will think about it.

@HBAVHS 6 лет назад

プロの修復。スーパー。ビデオをありがとう

@teddyhashee 6 лет назад

コメントありがとうございます。

@abujaafarhadi5798 6 лет назад

very good man

@teddyhashee 6 лет назад

Hi, ali. Thank you for your compliment on my work.

@abujaafarhadi5798 6 лет назад

You are creative in your work

@teddyhashee 6 лет назад

Thank you !!

@dondouglass7033 4 года назад

@@teddyhashee you do very will restoring vinage radios

@florinlepadatu5648 Месяц назад

I know I'm late to the party but I hava a question - mine is playing normal for 2 mins and then the speed is increasing - I suspect a bad motor (or regulator) and I saw at least 2 type of motors on these machines MHI-5E2RDPB or MHI-5B2RVNB both are 12V DC but the PCB layouts are different, the first one have 3 ball joints the other one 8... I haven't opened mine yet but I want to know what replacement code should I use what to look for to order as I couldn't find none of these models available. Are they dual speed motors? Could you point me to the right direction? What motor brand /model can I put in there... Thanks!

@gipipsb 6 лет назад

hello teddy you're a myth, I follow you and you're inspiring me, I've started to restore old Boombox. In fact, I wanted to ask you what products you use to clean and polish opaque and chromed plastics and Plexiglas. thanks go on like this

@teddyhashee 6 лет назад

First clean the entire body with mild detergent, use goo gone to clean more detail. For the silver color plastic, you want to you a little bit of stainless cleaner along with goo gone. Do not use to much stainless cleaner otherwise you will remove surface painting. Clear plastic lens, glass clean with rubbing alcohol, then polish it with plastic cleaner. Any type of plastic cleaner will help you to clean it. If there is a scratches you need to use water sand to remove it first, then polish it with plastic cleaner.

@gipipsb 6 лет назад

Teddy Hashee thanks

@teddyhashee 6 лет назад

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-mdeXVXl9iU4.html This video shows how I remove scratches with many kinds of cleaner. Also in my boombox restoration video, I showed how to remove deep scratches using water sand paper. The plastic cleaner and metal cleaner (stainless) is these one. www.soft99.co.jp/english/products/carcare/body_cleaner/plastic_cleaner.html?pid=09066 www.soft99.co.jp/english/products/homecare/kitchen/metal_polish.html?pid=20504 Teddy

@stelvio5213 5 лет назад

Hi teddy very good job. What application do you use to record the head frequency? and how does it work? what frequency must it have to be right?

@teddyhashee 5 лет назад

If you are talking about app I am using in the film to adjust the tape speed, it is called Tuner T1. I use A440 hz tape to adjust the speed. You need to create or buy any kind of tone adjustment tape. If you have a good speed tape deck, you can record A440 hz tone from youtube video. It does not have to be 440hz, any frequency test tape can be used with Tuner T1 app.

@stelvio5213 5 лет назад

@@teddyhashee Thank you so much. You were very kind to answer me. I hope to see another wonderful work of yours as soon as possible.

@teddyhashee 5 лет назад

Thank you!

@roxelbr 6 лет назад

Stay with a girl who treats you the way Dr.Teddy treats their boomboxes

@teddyhashee 6 лет назад

Thank you for the comment!

@dannyjaar 6 лет назад

i have a little question i have reels from america this reels playing really slow on my decks is that a power issue the netherlands 230 50 herts usa 127 voltjes 60 herts also with vhs from usa i can t get out a good picture i have new neighbours the coming over from tampa and they give me this.

@teddyhashee 6 лет назад

You need to change the power input selection from USA mode to European mode. If it does not have such a selecting switch, then you can not use it as you said the difference of the voltage and hz cycle. If you set it to European mode, then still it is showing slow speed, then you need to check the motor run capacitor. Replacing it will bring your R2R speed to the normal.

@dannyjaar 6 лет назад

problems with the vhs are solved a ntsc to pal problem my vcr have no ntsc support and ntsc is the system in usa if i have it good. a prodeck jvc from my neighbour soleved that problem for the reel i search for a solit solution.

@HauntedHarmonics 2 года назад

You seem to know quite a lot about the topic, any insight into why these JVC / Victor boomboxes are worth so much compared to others from the era? Are they just that high of quality comparatively? Nostalgia? The chrome aesthetic?

@Dervanism 4 года назад

I have one of the best if not the best the jvc rc-m90c Canadian version had more power still have it it works great sounds great and now it’s smart

@teddyhashee 4 года назад

Thank you for sharing your boombox info here.

@whalahiguy 2 года назад

I had power issues and all sorts of functions not working until I sprayed some Deoxit on the power switch on my own M70, trouble is, it won't turn off!

@Papaya-ip7ij 6 лет назад

잘보고갑니다. 오래된카셋트 몇개 갖고있다가 버렸는데 아깝네요 ㅋ

@teddyhashee 6 лет назад

thank you for the comment. I hope you keep your old school boombox for yourself.

@nguyenkhacvu3600 5 лет назад

what the soft wave on your telephone when you test? thanks

@teddyhashee 5 лет назад

Tuner T1

@itzmillertyme 5 лет назад

Great videos I love the old school boomboxes!! Do you offer this service to anyone?

@teddyhashee 5 лет назад

Thank you for the comment. You can contact me at teddy.hashee@gmail.com for the detail info about restoration service!

@audiofan3548 4 года назад

What happened from 23:24 to 23:50 it made the click sounds how did you fix it ? Thank you

@teddyhashee 4 года назад

That's the sound from "Not working auto stop" problem. Later in the video you see that I removed push buttons from cassette deck and showed one of the parts was broken. That's parts will be pushed in order to REW or FF to stop. You can see I replaced with other buttons unit and auto-stop started working correctly.

@dalesworld1308 5 лет назад

I should have you do the JVC RC550 I found in the trash. I only get extremely weak audio on FM and no cassette function. Deoxit helps a bit.

@teddyhashee 5 лет назад

So you have your cute baby El Diablo with you. Enjoy your time to restore it! It worth to do the restoration on your own!!

@srinivasulupasupuleti7383 4 года назад

Hi Teddy, i am staunch lover of post 1980 Boom boxes. Happy to see most of them now. I appreciate your interest. Where are you located i.e city.

@teddyhashee 4 года назад

NJ USA. Thank you for the comment!

@srinivasulupasupuleti7383 4 года назад

@@teddyhashee Thanks for your prompt reply but you have not mentioned your city.

@teddyhashee 4 года назад

To protect myself, I can not write it on comment section. Sorry. I am located very close to the GWB.

@revalid6824 4 года назад

Is there a way to change tape speed without having to completely open up everything?

@teddyhashee 4 года назад

Some type of the cassette deck has a hole in front of the motor and you can use tiny screw driver to adjust the motor speed. But most of the boombox, probably you need to open up the body in order to adjust the speed.

@RoughJustice2k18 4 года назад

Some Sharp and Sony twin-cassette boomboxes have trim-pots on the board to adjust normal and/or high-speed; there are none on the back of the motor. Trim-pots on the back of the motor tend to be easier to adjust than those on a board as there is not much in the way but they are prone to drift when the temperature changes due to the motor spinning and creating heat which affects speed. Board trim-pots don't suffer this problem because they are generally further away from the motor. ** Back of the motor or on the board is where you should find some adjustment pot for tape speed, depending on the model. **

@MSI6728 5 лет назад

Love your Chinese newspapers... :)

@teddyhashee 5 лет назад

Thank you! Actually it is Japanese, but in Japan they use Chinese character that's called "KANJI". Thank you again!

@MSI6728 5 лет назад

Liked abnd subscribed -- greetings from Budapest, Hungary... :)

@rthomp78 6 лет назад

How much to restore my m70 tape needs repair and switches need cleaning

@teddyhashee 6 лет назад

Hi, thank you for contacting me. I will reply to your email. Teddy

@rich_220 3 года назад

Its now my jvc m70 was pedro Feliciano's JVC m70 but it's mine now

@Yalta-otduhaet. 5 лет назад

VC RC M90-KING OF BOOMBOX!!!-МЕЧТА ВСЕХ КОЛЛЕКЦИОНЕРОВ ВО ВСЕМ МИРЕ!!!!!! Чудо аппарат - двухмоторная протяжка уровня кассетной деки среднего класса, мостовой усилитель мощности, НЧ динамики 20 см. По звуку превосходит недоработанный Sharp GF-777. Шедевральным у JVC получился бластер RC-M90 выпущенный в 1981 году. Эта модель была под завязку напичкана всяческими техническими наворотами: 8-волновым приемником, фирменной системой шумоподавления Super ANRS (которая успешно конкурировала с Dolby B и C) и т.д. Но главным преимуществом RC-M90 является сверхнизкий коэффициент детонации (WRMS) - 0,05%.

@teddyhashee 5 лет назад

Thank you for the great info.

@samadbabayev8366 5 лет назад

eto je ved ne M90 model a M70.Cto ne razobralsya eshe ?Ti govorish o Korole bumboksov Victor RC -M90.Eto je M70 model.

@TheWestergaard 5 лет назад

Hello sir, Do you offer any boxes for sale ?

@teddyhashee 5 лет назад

Whenever I have time to restore my stock boombox, I will list them on ebay or etc.. right now I am working to restore my clients boomboxes and no time at all.

@rogeldisonviveiro7643 5 лет назад

Restauração das radialo portátil igual uma maleta

@teddyhashee 5 лет назад

Thank you for the comment.

@ernestomathis3359 4 года назад

Hola a todos alguien sabe el valor del potenciometro del volumen del rcm70

@euronymous-_-6662 3 года назад

😱😱😱😱👍👍👍👍👍👍👍👍👍👍👍

@gustavodena2464 5 лет назад

En 1978 tube una higual y me gusto mucho se como trabaja la memoria del casset .di la vende hágamelo saber gracias

@gustavodena2464 5 лет назад

Perdón en 1985

@teddyhashee 5 лет назад

Thank you for the comment.

@Remington-T800 5 лет назад

Please restore aiwa 950. Its my favorite one

@teddyhashee 5 лет назад

That's nice machine. In the future if I encounter with aiwa-950, I will do it.

@dondouglass7033 4 года назад

@@teddyhashee hello Teddy my name Don I have a M70 JVC the bass and treble is not working but I would like to have it restored like I did that JVC M70 if you can't how much do you charge I have PayPal let me know would you thank you

@hmongproductionnujtxeeg 4 года назад

Con nay ban chau anh. Von nay bao nhieu tien vay

@teddyhashee 4 года назад

M70, in good condition probably $700 to over $1k in USA, I believe.

@hmongproductionnujtxeeg 4 года назад

@@teddyhashee à cảm ơn anh, em ở nước việt nam là dân tộc h,mông gia đình em cũng nghèo thôi. Với giá đấy thì em không mua nổi anh ạ

@teddyhashee 4 года назад

You can search boombox in your country too. Hope you will be get your own boombox soon!

@hmongproductionnujtxeeg 4 года назад

@@teddyhashee cảm ơn anh nhiều.

@hmongproductionnujtxeeg 4 года назад

@@teddyhashee em sẽ cố gáng tìm sên được không. Nhưng em không biết chứ không làm được gì anh ạ. Nhưng em cảm ơn anh đã chị cho em biết nhé

@welcometomychannelswelcome7261 6 лет назад

u are a doctor .

@teddyhashee 6 лет назад

Thank you for your compliment on my work.

@SECJR64 5 лет назад

Is this radio for sale?

@teddyhashee 5 лет назад

sold out

@felixlove5471 5 лет назад

ACTUALLY THE BEST BOOMBOX EVER WAS BUILT BY SHARP BACK IN THE 80'S SHARP HK-9000

@teddyhashee 5 лет назад

Thank you for the info!

@whalahiguy 4 года назад

I'd take the JVC PC-55 if we're talking a component system boombox. The one-piece boxes like this M70 are different, I personally prefer this style.

@Dervanism 4 года назад

JVC RC-M90 is the king I have had mine since 1982 still works great and sounds great and is now smart with Alexa added to it so loud but so clear

@guitarshred863 2 года назад

hello can you restore my Hitachi boombox/ I'm in California,

@winterjohnny8920 4 года назад

J’ai le même il fonctionne sur une voie ,le k7 courroie a changer mais je serais pas le réparer moi même ...

@teddyhashee 4 года назад

Changing the belts is not so difficult, but removing all necessary parts from body in order to leach the cassette deck is a little bit of tricky thing.

@user-td1pt4bd9c 6 лет назад

you do it for money or is it ehobbyоо

@teddyhashee 6 лет назад

Both

@user-td1pt4bd9c 6 лет назад

Teddy Hashee well when work is fun, I wish you a successful repair and then👍

@sergiorodas3341 4 года назад

te mando mi rc-828jw para una reparación.

@teddyhashee 4 года назад

I checked with google image, and your boombox is really in good looking one!

@sergiorodas3341 4 года назад

@@teddyhashee tenks, cuze have a fall. distortion in the first´s time since i power the radio. i try find the fall whit "aeroson fault finder" in the main transistor´s