Jump to content



Photo

Fixing a legend.....


  • Please log in to reply
279 replies to this topic

#31 blu_fuz

blu_fuz
  • Moderators
  • 10,503 posts
  • LocationWI

Posted 04 January 2014 - 06:27 PM

Just about every original cap in my 5350 is standing off the board. I assumed the new ones will stand the same and if they do, do I really need to worry about having 'insulated feet'?

Obviously if the new caps fit the board better and can be slid down to be 'butt tight' to the board I will put them all the way down.

#32 oldskool69

oldskool69
  • Moderators
  • 6,791 posts
  • Location'Bama!!! Deep In Da' Heart O' Dixie

Posted 04 January 2014 - 07:21 PM

Looking good on the progress Blu!  And let it be said that speed is not the right thing when restoring anything and you are going about it the right way! :-D

 

And good to hear from Supadupe!!! :clap:   Glad to hear from ya' Norm! :-)



#33 blu_fuz

blu_fuz
  • Moderators
  • 10,503 posts
  • LocationWI

Posted 04 January 2014 - 09:32 PM

Just got finished ordering the Nichicon Muse premium line (audio grade) caps. Total for it all with shipping was just under $40.

 

 

 

The distinct squiggly line drawn on my cap inventory count sheet was showing the numbers to the left of the squiggly line for the main board only. Then everything to the right or outside the squiggly line was the inventory for the tuner board and couple of other misc. spots with caps.
 



#34 Superduper

Superduper
  • Boomus Fidelis
  • 6,849 posts
  • LocationSomewhere over the rainbow, USA

Posted 04 January 2014 - 09:43 PM

It's true that higher voltage caps are generally larger than their lower voltage counterparts. However as manufacturing improvements and changes have resulted in modern caps being smaller overall compared to vintage caps, it's usually not an issue and could actually be a better fit than if ordering same voltage caps as original. Large caps (2200, 3300, 6800, etc.) should not stand off from the board unless the gap is filled (hot glue?) but small caps standing on legs is a non-issue.

#35 baddboybill

baddboybill
  • Boomus Fidelis
  • 10,986 posts
  • LocationHudson Florida

Posted 04 January 2014 - 10:06 PM

Like the guys said Joe take your time and double check polarity. This beast is gonna pound after it's all done :thumbsup:


Bad Boy Bill

#36 =ml=

=ml=
  • Members (SA)
  • 686 posts
  • LocationE-Rock (Eagle Rock, L.A.)

Posted 04 January 2014 - 10:47 PM

YOU must to add manufactures plants on asia region site page for boomers :yes: :clap: :hooray: :rock:according to dis

 

I like what Axel is doing at TVK. :yes: How do I become a member? :hmmm:

 

NM. TVK administrator.

 

Go!

 

=ml=



#37 =ml=

=ml=
  • Members (SA)
  • 686 posts
  • LocationE-Rock (Eagle Rock, L.A.)

Posted 04 January 2014 - 11:57 PM

ML, yeah buddy you can add it to the registry of date stamps. It was a '2nd' shift built box.

Norm, for sure about the dried up caps. I was searching for anything obvious that could be the culpret. I'm going to take inventory on the caps so I can get new ones ordered.

I was suprised at how easy it is to get to the main board, quick connectors, and plenty of room inside the 5350. I'm excited to get working on it ;).

Thanks Kenpat, I hope I can get it singing again.

Ps, there were 4 pins on the function switch that had only a partial blob of solder. 1 of the pins I was able to see it was wiggling free of the solder. Not sure why, maybe someone was in this box before...... who knows.

 

Thanks Joe! Added: http://www.pinterest...82069058421810/

 

Go!
 

=ml=



#38 =ml=

=ml=
  • Members (SA)
  • 686 posts
  • LocationE-Rock (Eagle Rock, L.A.)

Posted 05 January 2014 - 12:01 AM

Low voltage (6.3) caps were chosen by manufacturers for cost efficiency reasons, but in my opinion, those are too low for any kind of reasonable margin given the low cost of caps today, especially the low value ones. I generally go 25v (and even 50 or 100v) on the small ones. My point being if you have 4 different voltage caps with the same uF rating, (i.e. 1uf) then just order the same higher voltage rating caps all around for the entire lot and don't worry too much about matching voltage. Higher gives you better margin and longer service life, especially in cases where operating voltage isn't far below the caps volt rating.

 

I can understand why the constant charge/discharge cycle of a capacitor would necessitate eventual replacement. Aside from speakers, are there other components that if replaced, would increase a box's audio performance? :hmmm:

 

Go!
 

=ml=



#39 =ml=

=ml=
  • Members (SA)
  • 686 posts
  • LocationE-Rock (Eagle Rock, L.A.)

Posted 05 January 2014 - 12:04 AM

I agree there is lots of room to work on and easy to remove the boards but replacing any of those pots is so hard to work on.

Tuning chord is on the front plate where the pots mounted. Without removing the tuning chord it seemed practically impossible to work on them.

 

Good Luck Joe!

 

Hey Royce,

 

I see another date stamp on your 5350. Do you have a close up of it? :hmmm:

 

Go!
 

=ml=



#40 Beosystem10

Beosystem10
  • Members (SA)
  • 1,807 posts
  • LocationUK. 55.7710° N

Posted 05 January 2014 - 06:39 AM

I can understand why the constant charge/discharge cycle of a capacitor would necessitate eventual replacement. Aside from speakers, are there other components that if replaced, would increase a box's audio performance? :hmmm:

 

Go!
 

=ml=

Yes. Resistors often drift wide of their intended values and when this happens the level of background hash becomes much more intrusive. New ones are so cheap that it's not worth using anything above 10% tolerance in the A/F boards such as the push-pull, all Germanium ones I see on a regular basis in the Hackers and other high end domestic portable audio kit I deal with.

Applying the same logic to plastic boxes from the far east can work wonders; most recently I found that changing these in the French M70 currently on the bench back at home made a noticeable difference to that set's level of background noise and now, on an uncompressed FM stereo signal from BBC R3 or similar, all of the highs are intact but when the music goes into a quiet part of the piece, then there's no unwanted hiss in spite of the M70's incredibly revealing upper treble response.

Those resistors are playing a major part in making the set's performance not just live up to the hype that surrounds the model but exceed any expectations I had when I started the rebuild. I replace electrolytic caps (and any waxies or Hunts Mouldseals - obviously none of these in the JVC) as a matter of course but these days I find I'm replacing more resistors too. It's a cheap way to buy peace of mind when the box I'm working on has been sent from a long distance away and I wouldn't be able to simply go round and do any post-resto debugging after she's been sent back.

:-)



#41 BoomboxLover48

BoomboxLover48
  • Boomus Fidelis
  • 5,242 posts
  • LocationChicago, IL

Posted 05 January 2014 - 07:02 AM

Hey Royce,

 

I see another date stamp on your 5350. Do you have a close up of it? :hmmm:

 

Go!
 

=ml=

Miles, Let me look bro! I randomly took so many pictures of it when I was doing an extensive cleaning and lube.

 

 

 

Attached Files



#42 blu_fuz

blu_fuz
  • Moderators
  • 10,503 posts
  • LocationWI

Posted 05 January 2014 - 10:17 AM

Thanks Joe! Added: http://www.pinterest...82069058421810/
 
Go!
 
=ml=



Very cool!

#43 Lasonic TRC-920

Lasonic TRC-920
  • Moderators
  • 14,058 posts
  • LocationNaples, Italy

Posted 05 January 2014 - 02:29 PM

Just got finished ordering the Nichicon Muse premium line (audio grade) caps. Total for it all with shipping was just under $40.
 
 
 
The distinct squiggly line drawn on my cap inventory count sheet was showing the numbers to the left of the squiggly line for the main board only. Then everything to the right or outside the squiggly line was the inventory for the tuner board and couple of other misc. spots with caps.


Wow, thats really cheap! I can't wait to see where this goes

#44 BoomboxLover48

BoomboxLover48
  • Boomus Fidelis
  • 5,242 posts
  • LocationChicago, IL

Posted 05 January 2014 - 04:21 PM

Wow, thats really cheap! I can't wait to see where this goes

:agree:  I've spend $40 for two power stage capacitors alone on my Marantz reciever ...they were BIG guys little over the size of D cell batteries. ...and total cap replacement was ~$90 for my SABA 14 tube auto tuning radio.



#45 =ml=

=ml=
  • Members (SA)
  • 686 posts
  • LocationE-Rock (Eagle Rock, L.A.)

Posted 06 January 2014 - 02:39 AM

Miles, Let me look bro! I randomly took so many pictures of it when I was doing an extensive cleaning and lube.

 

Thanks Royce, that's a bit better: :yes:

 

Attached File  Screen Shot 2014-01-05 at 4.44.20 PM.png   588.82K   22 downloads

 

It looks to me like (L-R):

 

* 4 (1-12) month
* 2 (0-9; 1980-1989) year
* 2 (0-3) first day digit
* 0 (0-9) second day digit
* 1 (1-3) work shift 

 

so, April 20, 1982.

 

Unless you have a closer picture, that's the date and I'm sticking to it.  :-D

 

Go!
 

=ml=



#46 BoomboxLover48

BoomboxLover48
  • Boomus Fidelis
  • 5,242 posts
  • LocationChicago, IL

Posted 06 January 2014 - 05:17 AM

Thanks Royce, that's a bit better: :yes:

 

attachicon.gifScreen Shot 2014-01-05 at 4.44.20 PM.png

 

It looks to me like (L-R):

 

* 4 (1-12) month
* 2 (0-9; 1980-1989) year
* 2 (0-3) first day digit
* 0 (0-9) second day digit
* 1 (1-3) work shift 

 

so, April 20, 1982.

 

Unless you have a closer picture, that's the date and I'm sticking to it.  :-D

 

Go!
 

=ml=

Hi Miles, Actually I made the previous picture larger to get this one. I was lazy to bring it out and open it to take pics. I will do that later. :-D  :-D



#47 blu_fuz

blu_fuz
  • Moderators
  • 10,503 posts
  • LocationWI

Posted 08 January 2014 - 03:11 PM

I don't know why I am so excited to do all this work, but my CAPs are on thee way!

 

UPS

Estimated Delivery: Thursday, 01/09/2014



#48 blu_fuz

blu_fuz
  • Moderators
  • 10,503 posts
  • LocationWI

Posted 10 January 2014 - 03:54 PM

Well that's strange.....

 

 

  • Updated: 01/10/2014 4:53 P.M. Eastern Time
In Transit by Post Office1.gif
In Transit by Post Office This shipment is progressing through the postal system to the final destination.
 
 
 
 

This shipment is progressing through the postal system to the final destination.

Request Status Updates
Estimated Delivery: Saturday, 01/11/2014 Last Location: FOREST PARK, IL, United States, Thursday, 01/09/2014

 



#49 BoomboxLover48

BoomboxLover48
  • Boomus Fidelis
  • 5,242 posts
  • LocationChicago, IL

Posted 11 January 2014 - 08:43 AM

I've had issues where my boxes got stuck at  Forest Park. Magically on one fine morning it gets shipped out ...

There is no one to answer our calls even... :bang:



#50 Lasonic TRC-920

Lasonic TRC-920
  • Moderators
  • 14,058 posts
  • LocationNaples, Italy

Posted 11 January 2014 - 05:56 PM

Well that's strange.....


  • Updated: 01/10/2014 4:53 P.M. Eastern Time



In Transit by Post Office1.gif



In Transit by Post Office
This shipment is progressing through the postal system to the final destination.















This shipment is progressing through the postal system to the final destination.










Request Status Updates



Estimated Delivery:

Saturday, 01/11/2014

Last Location:

FOREST PARK, IL, United States, Thursday, 01/09/2014





Well that sucks

#51 blu_fuz

blu_fuz
  • Moderators
  • 10,503 posts
  • LocationWI

Posted 11 January 2014 - 09:11 PM

I was hoping to have them for tomorrow so I could get started! Boo.

#52 blu_fuz

blu_fuz
  • Moderators
  • 10,503 posts
  • LocationWI

Posted 14 January 2014 - 08:42 AM

My wife picked up the box of caps after work yesterday. Wowsa what have I gotten myself into!?!?! :eek:



#53 baddboybill

baddboybill
  • Boomus Fidelis
  • 10,986 posts
  • LocationHudson Florida

Posted 14 January 2014 - 11:47 AM

Just take it slow n easy and everything will work out :thumbsup:


Bad Boy Bill

#54 blu_fuz

blu_fuz
  • Moderators
  • 10,503 posts
  • LocationWI

Posted 14 January 2014 - 11:50 AM

I will and am looking forward to it :cool:.



#55 BoomboxLover48

BoomboxLover48
  • Boomus Fidelis
  • 5,242 posts
  • LocationChicago, IL

Posted 14 January 2014 - 06:06 PM

I will and am looking forward to it :cool:.

Don't listen to Bill because he has never seen a 5350. :lol:  :lol:  :lol:

Work in the night when your little angels are fast alseep!

If not one will get distracted.

I still do the same even though my kids are over 20 and wife don't bother me.....plus my HUGE puppy (10 months, 110Lbs already) German Shepherd..

.in the NIGHT. :w00t:  :lol:  :lol: :lol:  



#56 blu_fuz

blu_fuz
  • Moderators
  • 10,503 posts
  • LocationWI

Posted 14 January 2014 - 06:53 PM

I agree! Night time after the wife and kids are put to sleep is when I do my best work! Being distracted while replacing caps could be a huge problem!


New caps look beautiful!

Attached File  0114141849.jpg   68.98K   17 downloads

#57 oldskool69

oldskool69
  • Moderators
  • 6,791 posts
  • Location'Bama!!! Deep In Da' Heart O' Dixie

Posted 15 January 2014 - 12:40 PM

Go baby go...go...GO!!! :thumbsup:



#58 blu_fuz

blu_fuz
  • Moderators
  • 10,503 posts
  • LocationWI

Posted 15 January 2014 - 01:10 PM

^ thanks man! I sharpened up my solder iron tip and replaced 4 caps while I was hanging out with my 2yr old last night.

 

 

One problem. How can I get this huge circuit board held steady while I am doing my soldering? I will need to be able to flip/rotate the board for every cap, suggestions?



#59 baddboybill

baddboybill
  • Boomus Fidelis
  • 10,986 posts
  • LocationHudson Florida

Posted 15 January 2014 - 01:17 PM

They sell soldering stands that swivel :hmmm: or do like I do..... Get the wife involved. :lol:


Bad Boy Bill

#60 blu_fuz

blu_fuz
  • Moderators
  • 10,503 posts
  • LocationWI

Posted 15 January 2014 - 01:20 PM

No way would I get the wife involved on a 130+ re-cap job to help flip the board manually, I can do that myself with much less of a headache :lol:. I need to have it stand up on one of it's long ends.