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LED mod for JVC M70


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#1 Fatdog

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Posted 19 August 2009 - 08:31 AM

This post came from the great FYJ2972 at S2G.

Replace a burnt JVC RC-M70 dia light by a modern white LED is a fancy job.

But its dial-light momentary action push switch is not so cute. That means if you want the light stay on that you have to keep pressing the button.

Well, Owner said: Frank, I want that switch turn to be a lock-type switch without modify RC-M90 original switch.

Here turns to an idea. By using a 4017 chip could handle the job.

Here is how that IC works.Turn on the set, Press "DIAL-LIGHT" button once, LED stays on till you press that light again and it goes off.

12V/GND/Trigger wires are RED/WHITE/YELLOW. 3mm/5mm white LEDS are aside. One 5mm LED is on PCB, It will be installed to dial scale later.

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#2 redbenjoe

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Posted 19 August 2009 - 08:41 AM

:cool:
thanks

#3 MasterBlaster84

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Posted 19 August 2009 - 08:44 AM

But than it's not original. :-P :lol:

That's an ingenious and simple mod, very cool. Those LED's make a much better light source. :thumbsup:

#4 BMoney

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Posted 19 August 2009 - 10:34 AM

hey i recognize that! that's my m70 mod by frank! it looks like this wired up inside:

Posted Image

nice job diggin that one up Fatdog. :-D
if anyone's gonna change their dial light this is the way to do it. and it keeps it original. :cool: and who wants to hold that button down forever?

#5 Superduper

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Posted 19 August 2009 - 11:35 AM

THANKS! I have been brainstorming forever on how to rig up a variety of relays, etc. to effect exactly this! It never occurred to me to rig up a flip flop IC.

Way to go!

#6 Fatdog

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Posted 19 August 2009 - 12:25 PM

BMoney, you are absolutely correct! I was looking for a particular post from old Frank regarding M70 volume slider repair and came across his post about the LED. A lot of old Frank's posts are no longer there. :sad: Many great, old, tech posts have just disappeared from S2G. :

#7 BMoney

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Posted 19 August 2009 - 12:54 PM

A lot of old Frank's posts are no longer there. :sad: Many great, old, tech posts have just disappeared from S2G. :

that's not cool. there's just no way to remember all this stuff year after year. sometimes you just gotta go back and dig up some old material to read up on. but if it's not there... :-/

oh well...at least now it'll be here for everyone! :-D we definitely don't need to see boxes with toggles drilled into them for illumination purposes lol!

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:-/ :annoyed: :nonono: : :lol:

#8 monchito

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Posted 19 August 2009 - 01:04 PM

:w00t: :w00t: :w00t: :w00t:

#9 analogboi

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Posted 19 August 2009 - 01:09 PM

That's the way the LED light in the Sangean U-1 utility radio is done (a momentary switch with a 4013 IC and driver transistor). The Sangean might qualify as a bbx with its bridged amp and 6.5" speaker! No stereo or cassette tho.

It is my intention to share tech things I've done with my bbx's with my fellow boombox brothers, but I just don't have the time right now. It's VERY frustrating :annoyed: because I enjoy this type of "puttering." I love hot-rodding amp circuits, making eq circuits (Jovie!), and of course, LED mods are always cool. :thumbsup:

Nice pic of the M70s speakers btw.

#10 fyj2972

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Posted 29 November 2011 - 07:11 PM

Haha, Boombox is still hot.
BM keeps that M70. Faddog dug out my old post.


Nice to see everyone again.

#11 Fatdog

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Posted 29 November 2011 - 07:58 PM

Haha, Boombox is still hot.
BM keeps that M70. Faddog dug out my old post.


Nice to see everyone again.

Welcome aboard, Frank!! :w00t:

#12 redbenjoe

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Posted 29 November 2011 - 08:15 PM

glad you joined , frank

do you still run that famous shop ?

#13 robster

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Posted 25 January 2012 - 12:07 AM

Thanks.. can't wait to do mine.

#14 Maxx134

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Posted 26 March 2012 - 11:23 PM

Thanks.. can't wait to do mine.

Hello I see a kit now here:
http://www.analogall... ... aeb42a883c
Not sure if this was known, so though I would post.
Plus helps my post count of zero lol.

#15 -GZ-

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Posted 26 March 2012 - 11:49 PM

Thanks.. can't wait to do mine.

Hello I see a kit now here:
http://www.analogall... ... aeb42a883c
Not sure if this was known, so though I would post.
Plus helps my post count of zero lol.

That site belongs to the one and only :superduper: ...hes kind of a big deal :lol:

#16 Maxx134

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Posted 02 April 2012 - 11:32 AM

Thanks.. can't wait to do mine.

Hello I see a kit now here:
http://www.analogall... ... aeb42a883c
Not sure if this was known, so though I would post.
Plus helps my post count of zero lol.

That site belongs to the one and only :superduper: ...hes kind of a big deal :lol:


Ha I a newb so I don't know!
Also thinking this mod can be implemented on another JVc box like the RC-838 :)
might get it just for tinkering..

#17 Vintage Man

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Posted 23 April 2013 - 11:56 AM

THIS IS MY M70 WITH THE ANALOG ALLEY UPGRADE.. CAME WITH INSTALATION INSTRUCTIONS. AND DID IT MYSELF! AND IM NO TEC... SO IF I CAN,, YOU CAN TOO....Attached File  LG 046.jpg   62.23K   95 downloads



#18 Northerner

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Posted 23 April 2013 - 12:40 PM

Mmmm....still very tempted to do mine

#19 Vintage Man

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Posted 24 April 2013 - 12:18 AM

Mmmm....still very tempted to do mine

can send you the PDF file. its in full color. and so easy. i was amazed myself. kit was 59.00 i think. and choice of color. blue. red. white. or custom color for a bit more..



#20 fyj2972

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Posted 28 December 2013 - 08:54 PM

Hi. my old friends

 

I'am still with you guys.

 

Merry X'mas and Happy new year.



#21 Josey

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Posted 18 April 2014 - 03:22 PM

Any instructions-info on how to put the 4017 chip in?

Does it replace another chip?

Where do you get the chip from? would I need to replace the current lamps also?

 

Anyone?



#22 Fatdog

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Posted 18 April 2014 - 04:30 PM

Welcome aboard, Josey!  Your best bet is to purchase the entire kit from our very own member, Superduper.  Kits are extremely easy to install and can be purchased here:

 

http://analogalley.c...ght_upgrade.htm



#23 pap

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Posted 12 December 2015 - 04:08 PM

:cool:



#24 pap

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Posted 12 December 2015 - 04:21 PM

Attached File  WP_20151010_002.jpg   53.99K   49 downloads



#25 pap

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Posted 12 December 2015 - 04:42 PM

hi,
exemplar for purchasing one to try, it's a very well designed and easy to assemble.
the result is very professional and gives the JVC a touch more.
to finish, I just bought yesterday another.

 



#26 pap

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Posted 12 December 2015 - 04:52 PM

Attached File  WP_20151212_012.jpg   52.66K   33 downloads

 



#27 blu_fuz

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Posted 12 December 2015 - 07:42 PM

Always a great upgrade.

#28 pap

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Posted 16 December 2015 - 10:51 AM

hi blu_fuz,

thank for you opinion, this pictures is and you replica staps :-D :clap:

Attached Files



#29 Cameronplato

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Posted 14 June 2018 - 06:06 PM

I just performed this morning last night using the kit from analog alley. Great instructions and super cool outcome. Also, I cleaned everything with deoxit and fader lube while it was apart. That fixed some preamp channel issues (thin left speaker output). All good!

Here’s the suck part: the power switch isn’t working. It physically moves but the power just stays on. Do you think this is related to the lcd mod or do you think I jacked the switch up cleaning and working the power switch?

#30 Fatdog

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Posted 14 June 2018 - 08:51 PM

Here’s the suck part: the power switch isn’t working. It physically moves but the power just stays on. Do you think this is related to the lcd mod or do you think I jacked the switch up cleaning and working the power switch?

I can think of one way to find out.  :-D

 

Welcome aboard, Cameron.  Finally... another Nashville boy on here!  :cool: :rock: