Assistance requested for a recap noob and his LC 475 & LC III

[LazarusNine]

Dear all,

I'm a bit of a novice as it comes to recapping, and I intend to get a bit of practice in before attempting to recap my LC 475 and LC III. However, I conducted a speculative shop for capacitors online and I would appreciate a bit of feedback to see if I've got things right. The information I'm going off of is uniserver's cap selection guide. As I understand it, these are the capacitors needed to recap an LC III and its power supply:

Mac LC III:

4x - 10µf - 16V - SMT
5x - 47µf - 16V - SMT
1x - 100µf - 6.3V - SMT
 
Mac LC III Power Supply
2x - 270µf - 25V - Radial
1x - 270µf - 10V - Radial
1x - 56µf - 25V - Radial
 
And for the LC 475:
9x - 47µf - 16V - SMT
2x - 100µf - 6.3V - SMT
 
Does the LC 475's power supply use different caps than the LC I, II and III? Also, I noticed on my 475's mobo that the two 100µf caps were 6V instead of 6.3V. Does this matter?
 
Anyway, I've attached two images, which include all of the caps I put in my basket on RS Online for the purposes of recapping these boards and potentially both power supplies. I am a COMPLETE novice when it comes to things like sizes. I believe at 7.3mm, the 47µf 16V tantalums are on the large side, but I think they'll still fit; the alternative was paying a fortune for different ones. If you see any glaring errors, please let me know, because I don't really want to mess this one up! All the best everyone.
 
Kind regards,
Steve

 

[Elfen]

First of all, do the machines turn on? If so, do the recapping very slowly and test after each cap replaced. Literally.

If they are dead, there's a 80/20 chance that recapping the board wont bring the board back to life. This is because of rotted traces that need to be redone when the recapping is done. It is best to send it to Uniserver as he does excellent work on recapping the board and bring it to life. You need to talk to him about the price, but that includes labor and parts, and when you get it you know it will work.

The 475 LC Power supply, has slightly higher rated voltage caps than the LCIII. You need to go in and see by how much. But the caps that are listed are the ones that usually blow first. Best to change them all. But be warned, you need to go and physically measure the dimensions of the caps and order not only a µf @ V but also the physical size as space is tight in there! I and a couple others bought caps that were physically too big (in my case and in another's they barely fit but it was a tight squeeze!). The PSU work with the bigger caps but the case barely closed if at all.

BTW - I buy my caps from Trag here on the forum and from Mouser and Newark.

 

[CompuNurd]

Capacitor list for TDK PSU:
(does not include line filter)
 
3x 1000uF 10V 10mm diameter 16mm length
1x 56uF 25V 5mm diameter 15mm length
1x 270uF 10V 6.3mm diameter 11.2mm length
2x 270uF 25V 10mm diameter 12.5mm length
1x 47uF 25V 5mm diameter 11mm length
1x 10uF 50V (replaces C8 at 8.2uF 50V) 5mm diameter 11mm length
 
Make sure not to get the short, fat ones as you will have trouble making them fit. Also make sure the values match, as your unit may be different. I would replace them all, as they will all go bad eventually.

 

[LazarusNine]

Many thanks to Elfen and CompuNurd for your suggestions - they're both extremely helpful. As it turns out, my LC III does not have a TDK power supply, but one by 'Dyna Comp. Inc.' manufactured in India. A careful look at the caps seems to suggest that they're in decent shape - no visible leakage. They no doubt need replacing at some stage, but I may leave it for the immediate future, as I will have to go through and look at each cap to determine what's needed. From a cursory glance, I can see a couple that are 82uF 3.5V (or something like that).

In any case, I've placed my first order with Farnell, and I opted for case size C, which is about 6mm in length. This corresponds well with the width of the current capacitors, so I don't think it will pose too much of a problem with the mobo cap change. I will attempt the LC 475 first, as those caps are leaking all over the board, but I can definitely see some slight residue near the LC III's caps as well. Nevertheless, I'll post my successes/failures once the first recap job is complete.

A special thanks goes to Uniserver for his helpful directions and suggestions.

 

[uniserver]

When I bought a 12 pack of lc psu's from my guy in Guam, Most were tdk, 2 or 3 were aztech and one was a dayna corp, I noticed the Dayna one still worked fine , No leaky caps, I think they used way over voltage caps in the smoothing side like 35 volts, so cheers to them for spending a few more cents and making a better psu .