Do the LC 520 and Color Classic share the same AB?

[Cam]

Short story: I need to recap a LC 520 analog board, and it looks like a CC AB. Do they share the same AB, so I can use the CC cap list to order from?

Long story: I bought an LC520 out of Japan listed as "junk' with the hopes of using the LB to upgrade one of my CC machines to a CCII. I took delivery, and curiosity got the better of me and I plugged it in, and turned it on. The damn think booted like a champ! It needs to be scrubbed, and the screen flickers and the colour is a little off. Floppy needs to be looked at, and the CD ROM . . . meh it'll be the last thing I look at.

Thanks,
C

 

[Cam]

OK, recap is done (except for the rifa cap; forgot to order one). Surprisingly there was no leakage to clean up.
The supply part that feeds the LB is the same as the CC (which makes sense), but I'm not sure about the CRT supply. Do larger CRTs need more voltage/current than their smaller counterparts? Just reflowed all the cracked/dodgy looking joints.

Surprised the AB allowed the LB to boot at all. I desoldered one leg of a capacitor, and the thing dropped off the board! This happened for 3 capacitors, so they must have been making contact through gravity?!

 

[ymk]

Do larger CRTs need more voltage/current than their smaller counterparts? Just reflowed all the cracked/dodgy looking joints.

Yes. @techknight goes over some of the differences and swaps parts between the two ABs in this video:

 

[Cam]

Yes. @techknight goes over some of the differences and swaps parts between the two ABs in this video:

Awesome! Thanks for pointing me in that direction.

C

 

[imactheknife]

520 isnt a color classic ii, think its a 550 board you want..

 

[Cam]

520 isnt a color classic ii, think its a 550 board you want..

You're right of course, but I could find a 520, and overclocking the 520 board should give the same performance as the 550 (?).