Mac LC 575 Analog Board Recap Guide Photos

[Marconelly]

I needed to recap my LC 575 analog board, and couldn't find a guide for it, so I decided to make one, similar looking to what Branchus Creations has created for the Color Classic analog board.

LC 575 AB is very similar in layout and uses very similar capacitors as the Color Classic AB. The differences in capacitors needed are minimal, and I have worked with the Console5 owner to update his Color Classic Analog kit to include what was missing for the LC 575 board, so all their kits sold from now on will be LC 575 compatible.

This board's model number is 630-0355:

 

[Jerithjdf]

I needed to recap my LC 575 analog board, and couldn't find a guide for it, so I decided to make one, similar looking to what Branchus Creations has created for the Color Classic analog board.

LC 575 AB is very similar in layout and uses very similar capacitors as the Color Classic AB. The differences in capacitors needed are minimal, and I have worked with the Console5 owner to update his Color Classic Analog kit to include what was missing for the LC 575 board, so all their kits sold from now on will be LC 575 compatible.

This board's model number is 630-0355:
View attachment 22037
View attachment 22038

Firstly THANK YOU! This is a huge help in my attempting to repair a Macintosh Performa 550 that I recently acquired. There is a slight issue I found when attempting a recap using the Console5 recap pack. On one of the 1000uF 16V caps the polarity is reversed between your picture and my board. It looks to be CP14 according to the labeling on my board and it also shows the opposite polarity labeled as well. I have attached both a pic of my board before I removed the caps (and cleaned it) and after I have removed the caps.



I was really hoping to get some insight or help with this as I am not sure which way to align the capacitor. My guess would be since your analog board in the pic shows as "rev 1" and mine appears to be "rev A5" it might be some slight variation and I should follow what is printed on my board. Please any advice would be appreciated and thank you in advance!

PS it's the same model number "630-0355-", thanks!

 

[dougg3]

I was really hoping to get some insight or help with this as I am not sure which way to align the capacitor. My guess would be since your analog board in the pic shows as "rev 1" and mine appears to be "rev A5" it might be some slight variation and I should follow what is printed on my board. Please any advice would be appreciated and thank you in advance!

PS it's the same model number "630-0355-", thanks!

For what it's worth, I recapped my Macintosh TV's analog board (also "630-0355-") back in 2013 and CP14's orientation matched your picture. I put it back in the same way as the original and it worked fine. There was no revision sticker at all on the board. Here's a picture of how it looked before I recapped it:

 

[Jerithjdf]

For what it's worth, I recapped my Macintosh TV's analog board (also "630-0355-") back in 2013 and CP14's orientation matched your picture. I put it back in the same way as the original and it worked fine. There was no revision sticker at all on the board. Here's a picture of how it looked before I recapped it:

View attachment 22587

Thank you! It looks like yours is missing the little sticker that has the revision # on it, just says "place label here" LOL. I did go ahead and orient it based on the original board config rather than the walkthrough. I appreciate your response, glad to hear it worked out properly.

 

[Marconelly]

I was really hoping to get some insight or help with this as I am not sure which way to align the capacitor. My guess would be since your analog board in the pic shows as "rev 1" and mine appears to be "rev A5" it might be some slight variation and I should follow what is printed on my board. Please any advice would be appreciated and thank you in advance!

PS it's the same model number "630-0355-", thanks!

Yes, I see that one 1000uF cap on your board faces the other way. Just put the new one the same way the original one was facing, and you'll have the markings on the board to confirm this 100%. When in doubt, always follow the markings on the board.
The photo of my board is before I did any recapping, and I really doubt the board had been worked on before me, so it must just be some small variations between the revisions. That said, I'm tempted to open my LC575 to double-check the board markings now, even though I tested it and confirmed it works fine. Problem with my LC, is that much like the others nowadays, every time I open it, a new piece of plastic breaks off.

Btw, I see that your white Rifa cap has developed a crack, so it's good that you're replacing it too. Same thing was with one on my other boards.

 

[Jerithjdf]

Yes, I see that one 1000uF cap on your board faces the other way. Just put the new one the same way the original one was facing, and you'll have the markings on the board to confirm this 100%. When in doubt, always follow the markings on the board.
The photo of my board is before I did any recapping, and I really doubt the board had been worked on before me, so it must just be some small variations between the revisions. That said, I'm tempted to open my LC575 to double-check the board markings now, even though I tested it and confirmed it works fine. Problem with my LC, is that much like the others nowadays, every time I open it, a new piece of plastic breaks off.

Btw, I see that your white Rifa cap has developed a crack, so it's good that you're replacing it too. Same thing was with one on my other boards.

Thanks for the feedback, yes the original board had the markings indicating it should face opposite of the polarity in your photo. I don't know that it's worth the risk either for you to check. I imagine you would have had some issues by now with a backwards facing capacitor.

Video of reversed polarity capacitor: