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Post subject: 1990's Tweed Blues Deluxe (( Dreaded broken ribbon cable ))
Posted: Thu Jul 14, 2016 4:34 am
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A buddy dropped off an original Blues deluxe with loose input jacks and no signal
Easy fix right !
I replaced the jack and had minimal signal, and so the hunt was on
turns out the far right ribbon cable had several wires either broken or severely damaged

Pulling it back to reveal the problem it basically tore off the main board

Any Suggestions here on replacing these junk parts ????
Rewire one wire at a time maybe ???
on top of that a solder point immediately lifted from the board as i was trying to clean up the left over cable wire pieces :roll:

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Post subject: Re: 1990's Tweed Blues Deluxe (( Dreaded broken ribbon cable
Posted: Fri Jul 15, 2016 5:05 am
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Your going to have to break out "ye old pen knife" and peel all those pin lines back and solder them back on. Or buy a new one for under $5. Get the standand solder sucker, if you don't have one... It's not that big of a deal... Easy fix... In fact it will take you longer getting the PCB out of the amp chasis than soldering those back on. While your at... might as well replace the filter caps with new/better grade... 1990's amp probably need changing... New Tubes and ya got a new amp :)

I don't know why Fender doesn't use some sort of ribbon cable conector mounted on the PCB. You can get them and mount them on yourself.. come in all types and sizes.. then if you have a problem again just unclip the ribbon and get a new one.. Pretty standard stuff in the electronics world.. Digi-Key Electronics has them... (and probably everything you need)


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Post subject: Re: 1990's Tweed Blues Deluxe (( Dreaded broken ribbon cable
Posted: Fri Jul 15, 2016 10:14 am
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pcalugaru wrote:

I don't know why Fender doesn't use some sort of ribbon cable conector mounted on the PCB. )


1- Cost ?
2- Less reliable than solder ?


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Post subject: Re: 1990's Tweed Blues Deluxe (( Dreaded broken ribbon cable
Posted: Fri Jul 15, 2016 3:07 pm
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Being that it's the shortest run I'll probably just use solid copper single wires then separate them with tape just like a ribbon cable.

Hoping and praying no more solder tabs lift !

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Post subject: Re: 1990's Tweed Blues Deluxe (( Dreaded broken ribbon cable
Posted: Fri Jul 15, 2016 5:38 pm
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stratele52 wrote:
pcalugaru wrote:

I don't know why Fender doesn't use some sort of ribbon cable conector mounted on the PCB. )


1- Cost ?
2- Less reliable than solder ?


I don't think cost is a factor. Conectors don't cost that much... (IMO....the cost wouldn't bust the fixed cost of the unit/profit margin...but Im not a bean counter for Fender) When I wrote what i did... I was thinking about reliablity... would/will those conectors hold up to vibration? That is the question... I bet they don't... that's probably why they don't use them.. although I would love to to put them in.. (when old faithfull dies.. ala a 2001 HRDx gigged hard for 15yrs... that refuses to die or have anything major go wrong... I'm probably going to try it... probably won't work... but.. never know unless one tries...was thinking of using some silicone to keep them from vibrating loose... worth a shot


Last edited by pcalugaru on Sat Jul 16, 2016 2:28 am, edited 1 time in total.

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Post subject: Re: 1990's Tweed Blues Deluxe (( Dreaded broken ribbon cable
Posted: Fri Jul 15, 2016 6:04 pm
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I hate those boards that have strip connectors on the edge. Very hard to fix, once things get brittle & start cracking.

The worst has to be the Peavey Classic series boards. With the bare metal strips. You actually have to straighten out the folded boards to resolder bad contact points. Then, refold the damn boards back. One has about, two of these fold, refolds --- until the stupid connectors start breaking.

I will never work on one of these amps, again!

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Post subject: Re: 1990's Tweed Blues Deluxe (( Dreaded broken ribbon cable
Posted: Sat Jul 16, 2016 2:33 am
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BMW2002Ti wrote:
I hate those boards that have strip connectors on the edge. Very hard to fix, once things get brittle & start cracking.

The worst has to be the Peavey Classic series boards. With the bare metal strips. You actually have to straighten out the folded boards to resolder bad contact points. Then, refold the damn boards back. One has about, two of these fold, refolds --- until the stupid connectors start breaking.


I will never work on one of these amps, again!

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You have got to be kidding! WTF?

OMG! head slap!

What a stupid layout for an amp!
I'm the kinda of guy that doesn't think bad about PCB's/repairs.. don't really have a problem with them.. I can get pretty inventive ... but that...

What was Peavy thinking??


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Post subject: Re: 1990's Tweed Blues Deluxe (( Dreaded broken ribbon cable
Posted: Sat Jul 16, 2016 2:46 am
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BMW2002Ti wrote:


I will never work on one of these amps, again!

Image


A ( &*?#!! ) Peavy Classic 30
I hate those kind of amp too, but I fixed them.


Last edited by stratele52 on Sat Jul 16, 2016 3:01 am, edited 1 time in total.

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Post subject: Re: 1990's Tweed Blues Deluxe (( Dreaded broken ribbon cable
Posted: Sat Jul 16, 2016 2:56 am
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pcalugaru wrote:

I don't think cost is a factor. Conectors don't cost that much... (IMO....the cost wouldn't bust the fixed cost of the unit/profit margin...but Im not a bean counter for Fender) t


Yes IMO cost is a factor but reliability is more important as you write.
They could use better connector with use other wires than ribbon.

Why Fender ( and many other) use cheap IC filter caps when they can use good F & T caps which cost $1 more ?


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Post subject: Re: 1990's Tweed Blues Deluxe (( Dreaded broken ribbon cable
Posted: Sat Jul 16, 2016 7:16 pm
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I saw a video on youtube of a repair to that ribbon cable. The repair guy used silicone after the repair to keep the cable from vibrating and breaking again. Might be a good idea to reflow solder to the other ribbon cable contact points and apply silicon to those as well. Just a thought. ...

Good luck and let us know how it went.

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Post subject: Re: 1990's Tweed Blues Deluxe (( Dreaded broken ribbon cable
Posted: Sun Jul 17, 2016 1:29 am
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Some silicone may have some resistance. It must not be in contact with bare wire.

Vibration can't break those ribbon cable, it break only when you service the amp.


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Post subject: Re: 1990's Tweed Blues Deluxe (( Dreaded broken ribbon cable
Posted: Sun Jul 17, 2016 7:55 am
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Its a short run and after much thought I'll find some solid wire and solder in individual wires.
I'll get it done next week and let ya know how it comes out.

I really don't care for working on this stuff !
I've put input jacks in this same amp twice in two years, it gets gigged andso..........................
whatta pain !

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Keepn' the Blues Alive

2004 50th Ann. Limited edition AMSE Stratocaster
2017 50's Baja Telecaster BSB

1968 Bandmaster with 2X12 cab C-rex speakers
VHT Special 6 Ultra combo

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Post subject: Re: 1990's Tweed Blues Deluxe (( Dreaded broken ribbon cable
Posted: Mon Jul 18, 2016 5:52 pm
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stratele52 wrote:
Some silicone may have some resistance. It must not be in contact with bare wire.
This is true, but the correct type of silicone, referred to as neutral cure, will not affect it.
Vibration can't break those ribbon cable, it break only when you service the amp.
I've seen vibrations break welds on metal frames. This particular ribbon cable may have not been broken by vibration, but to insinuate that its not possible is incorrect.


:D

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Post subject: Re: 1990's Tweed Blues Deluxe (( Dreaded broken ribbon cable
Posted: Tue Jul 19, 2016 1:12 am
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socal323 wrote:

Vibration can't break those ribbon cable, it break only when you service the amp.
I've seen vibrations break welds on metal frames. This particular ribbon cable may have not been broken by vibration, but to insinuate that its not possible is incorrect.


:D[/quote]

Break welds on meal frame ; You see that on a amp ?

Weld on metal frame and ribbon cable are two different thing.

I'm sure vibration on a amp can 't break ribbon cable like any piece of wire on any amp.

There are alway some exception everywhere ; Trump :lol:


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