Need a capacitor list for my Graphite iMac's Analogue board

[68kPlus]

Hi everyone,

Just wondering if anyone has a capacitor list for the Apple 661-2466 iMac G3 analogue board (early 2001, LG CRT and board).

Thank you in advance.

 

[68kPlus]

Update: Never mind, just found out the cap I was worried about is actually fine. Those little vinyl caps are deceiving!!
If anyone does have a list though, do leave it here for others. There's a shortage of iMac G3 capacitor lists.

 

[bzyzny]

https://macdat.net/cap_reference/apple/imac/referencepdf.pdf

I came across this list when working on my G3 iMac. It is almost the same as what I found on my board but a few minor differences where apparently Apple increased the voltage ratings on my newer revision. I plan to post the capacitor list I compiled once I verify my recap was successful.

 

[68kPlus]

Helpful! Thanks.
What is your iMac G3?

 

[bzyzny]

Mine is the 2001 600Mhz Snow version, with an LG analog board. So far I've determined that Q704 (TIP122) was shorted. The Teapo/Su'scon caps did not instill confidence in me, so I figured I might as well recap it while I had it apart. It was a lot of work and I am currently doubting whether replacing all of the caps was a good idea. Will find out tomorrow when I reassemble and test everything.

 

[68kPlus]

Mine is a 600MHz Graphite version, with LG board too.
Definitely will be interesting to see.
Good luck!

 

[bzyzny]

Did you have any success repairing yours, or has it been sitting since April when you started this thread?

 

[68kPlus]

Well the main reason I made the thread was because I saw what I thought was a bulging cap (a really big one like 600uF), and it turns out it was actually the vinyl cover on it, so it was fine.
The Mac (and my other one from the same place) both have the cosmetic issue but they're completely fine.
Are there any issues with yours?

 

[bzyzny]

I got this imac about a month ago and it was working fine for several hours, then suddenly the screen became very dim and stretched past the edges of the screen. After troubleshooting, I figured it was likely bad caps or shorted IC on the analog board. Assuming my repair is successful, I intend to do a more detailed write-up about it, since information on repairing these PAV boards seems to be scarce.

 

[68kPlus]

Oh interesting. Did the iMac seem like it was quite heavily used? The indigo 400MHz iMac I had did the screen jump a bit and seemed quite heavily used but my Graphite seems to be completely rock solid in regular use.

Honestly I'm starting to believe the Slot loading Macs are actually more reliable than the tray loaders when it comes to the analog and logic board.

 

[bzyzny]

It was surprisingly clean inside, practically no dust and very little soot on the anode cable. When the CRT was working I didn't notice any issues with geometry, convergence etc. There seemed to be plenty of brightness left, however I did notice a slight burn-in at the top where the menu bar is. I would guess that means it has a low to average number of hours on it, it looked good enough to be worth fixing at least.

 

[68kPlus]

Yeah definitely. Especially considering it's a Snow, which are more valuable due to the colour rarity.

 

[bzyzny]

I wasn't aware the Snow was more rare, that is good to know. Unfortunately, when I reassembled it enough to test it, it powered on but still had the same problem, dim screen and image stretched past the edges. After a few minutes, it shut off and now wont turn on at all. Very sad, but I'm going to start a new thread about it. Hopefully someone can help me figure it out.

Anyways, here's my capacitor list, hope it helps people with future repairs.

 

[68kPlus]

That's a shame. Hopefully you can get it working :/

Thanks for the capacitor list, that's really helpful.