JVC M70 Restoration and Bluetooth Mod
Vložit
- čas přidán 26. 07. 2024
- 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.
www.paypal.me/teddyhashee358
BTC (Bitcoin):
1DQJChuaZi2bHamigZWVvKwHShsTJW9uQk
BCH (Bitcoin Cash):
qqe43k5hdvuzstz8zxmamn0qn6x44y4wzqj240h99n
ETH (Ether):
0xaC7578787cA1964cf45b314b2ac9eB2cF876FB05
LTC (Litecoin):
LNJf56cM4pRgH4G47EePCUGMQWAJLV4zyi - Jak na to + styl
Pentru mine esti cel mai bun restaurator de electonice vintage ever!
Wow, quite an elaborate job. And a beautiful machine it is indeed. Love the bluetooth mod with backlight.
Hi, Albert. Long time no see! Thank you for the compliment on my work.
I don’t know how you do, you really are the best.
Thank you so much for restoring my Sharp M70
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
Another great restoration Teddy. Amazing on how you fix them. Keep up the great work
Thank you Fransico for your compliment on my work.
See, THIS is a boombox that is worth restoring!
Thank you for the comment.
Very good when you know what you're doing.
Great job!
Dicen que cada 1000 años nace un sujeto que es capas de lograr cosas increibles, definitivamente eres ese sujeto
this is a AWESOME boombox...... how in the world do you remember where everything goes once you had taken it apart ???? Talent you have !!
Thank you. And I answered how to putting back together or how I remember question on the other thread.
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.
New boombox fan - thanks for sharing these valuable images & details. You are very patient - kudos!
Thank you for your compliment on my work!
Glad to see another restoration video 😊
Hi, Miguel. Thank you for your compliment on my work.
Great Work! It's a wonderful sounding boombox; I remember them.
Thank you for your compliment!
@@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?
Good work Teddy!The best!
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!
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!
thank you... No more masters like you. you are very patient. your perfect master
Thank you for your compliment on my work!
@@teddyhashee how much you restore boombox's for?
Very nice Sir, your efforts are really admirable.
Thank you Faisal for your compliment!
Thank you, Master Teacher of radios!
Thank you for your compliment on my work!
Excellent restoration. The quality of those components are excellent. Just look at the rubbish in today’s excuse for boom boxes
35 h. 37 min. ??? Wow! Filigree work! 👍👍👍👍👍👏💪💃
Thank you for your compliment.
greetings from Russia I really like what you're doing 👍
Thank you for your compliment on my work.
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!
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!
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!
It will be a fun for you to restore GE boombox. By the way, you know the word "Sensei". Great!
So much work! But worth it. Wow!
Thank you for your compliment on my work!
Que genial trabajo!! Saludos desde Argentina!
Thank you for your compliment on my work!
Great job dude!
Thank you for your compliment!
Nice work! I had the same problem with the power switch on my 1985 GE boombox.
Thank you for your compliment on my work. Great to hear you solved power switch issue. :-)
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.
If the cleaning won't work, you want to replace leaf switch since it has tendency not to work easily after long year.
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.
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.
So they removed the selection switch and used cassette power switch for the power the amp. Interesting.
really like your vids, what bluetooth device would you recommend for putting inside?
Stay with a girl who treats you the way Dr.Teddy treats their boomboxes
Thank you for the comment!
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.
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.
Nice repair and cleaning job. The product you give to the front, is it paint polish?
Boss,,ghetto blaster
King.....
Yur da koolest....
✋👍😁😁😁😁😁🍺🍺
Peace n kindness down under Sydney australia
Can you make a video showing the audio equipment that you normally use? And explaining everything
Thank you Valentine for your comment. I will think about it.
잘보고갑니다. 오래된카셋트 몇개 갖고있다가 버렸는데 아깝네요 ㅋ
thank you for the comment. I hope you keep your old school boombox for yourself.
very good man
Hi, ali. Thank you for your compliment on my work.
You are creative in your work
Thank you !!
@@teddyhashee you do very will restoring vinage radios
プロの修復。スーパー。 ビデオをありがとう
コメントありがとうございます。
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!
Great videos I love the old school boomboxes!! Do you offer this service to anyone?
Thank you for the comment. You can contact me at teddy.hashee@gmail.com for the detail info about restoration service!
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?
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
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.
Teddy Hashee thanks
czcams.com/video/mdeXVXl9iU4/video.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
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
Thank you for sharing your boombox info here.
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?
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.
@@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.
Thank you!
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.
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!!
Are you still fixing and making boomboxs look brand new again
Love your Chinese newspapers... :)
Thank you! Actually it is Japanese, but in Japan they use Chinese character that's called "KANJI". Thank you again!
Liked abnd subscribed -- greetings from Budapest, Hungary... :)
Its now my jvc m70 was pedro Feliciano's JVC m70 but it's mine now
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.
NJ USA. Thank you for the comment!
@@teddyhashee Thanks for your prompt reply but you have not mentioned your city.
To protect myself, I can not write it on comment section. Sorry. I am located very close to the GWB.
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%.
Thank you for the great info.
eto je ved ne M90 model a M70.Cto ne razobralsya eshe ?Ti govorish o Korole bumboksov Victor RC -M90.Eto je M70 model.
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!
Restauração das radialo portátil igual uma maleta
Thank you for the comment.
what the soft wave on your telephone when you test? thanks
Tuner T1
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.
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.
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.
Hola a todos alguien sabe el valor del potenciometro del volumen del rcm70
Please restore aiwa 950. Its my favorite one
That's nice machine. In the future if I encounter with aiwa-950, I will do it.
@@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
En 1978 tube una higual y me gusto mucho se como trabaja la memoria del casset .di la vende hágamelo saber gracias
Perdón en 1985
Thank you for the comment.
What happened from 23:24 to 23:50 it made the click sounds how did you fix it ? Thank you
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.
😱😱😱😱👍👍👍👍👍👍👍👍👍👍👍
Is there a way to change tape speed without having to completely open up everything?
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.
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. **
ACTUALLY THE BEST BOOMBOX EVER WAS BUILT BY SHARP BACK IN THE 80'S SHARP HK-9000
Thank you for the info!
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.
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
u are a doctor .
Thank you for your compliment on my work.
How much to restore my m70 tape needs repair and switches need cleaning
Hi, thank you for contacting me. I will reply to your email. Teddy
Hello sir, Do you offer any boxes for sale ?
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.
Con nay ban chau anh. Von nay bao nhieu tien vay
M70, in good condition probably $700 to over $1k in USA, I believe.
@@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
You can search boombox in your country too. Hope you will be get your own boombox soon!
@@teddyhashee cảm ơn anh nhiều.
@@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
J’ai le même il fonctionne sur une voie ,le k7 courroie a changer mais je serais pas le réparer moi même ...
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.
Is this radio for sale?
sold out
hello can you restore my Hitachi boombox/ I'm in California,
you do it for money or is it ehobbyоо
Both
Teddy Hashee well when work is fun, I wish you a successful repair and then👍
te mando mi rc-828jw para una reparación.
I checked with google image, and your boombox is really in good looking one!
@@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
I sent u an email teddy i hope ur still restoring boomboxes please get back to me
لواء وچيه مهندسه واحئاكتنه مهندسه واحياد اعتنرسهتن واحاد مهتندسين واعتنرسين واحادسهبين اعتنرستن واحاد بقوة الحاجة اعترض بقوتنا جدا أعترض القوتهة بقوة
Thank you for your compliment on my work!
Hobby
Great Work ! Congrats.
Here my evolved M70 : czcams.com/video/DNqbE8rCtKw/video.html
Thank you for your compliment. And your LED on the box is great!
look at the japanese production.. it is great..
but now the problem is
all productions are made in china .... i mean whih out quality
Thank you for the comment!
Ghetto Blaster