Classic - Classic II logic board swap

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bengi's picture
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Classic - Classic II logic board swap

I have a spare Classic II Logic Board and a working Classic: is it enough to swap the board to upgrade the Classic to a Classic II or they have specific analog power boards?

Any hint is welcome!

Ben

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Yep, it is enough and is just

Yep, it is enough and is just a direct swap-in.

The analog board only matters if you're trying to swap a CRT. Note that if you get a checkerboard pattern with the new motherboard, it is due to leaking caps (common on Classic II motherboards) and not something wrong done during installation.

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thanks. It works but is sound

thanks. It works but is soundless.

Ben

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Re: thanks. It works but is sound

thanks. It works but is soundless.

Ben

I assume you haven't put the rear cover back on yet. The Classic II has additional ports on the back. If I remember correctly it has an audio out and microphone port where the Classic doesn't. You will have to drill small holes for them in your rear case.

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the classic case that I have

the classic case that I have has the hole. However that port is the audio in, while this lobo has no sound.

ben

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Re: thanks. It works but is sound

thanks. It works but is soundless.

Ben


yeah, that is unfortunately due to leaking caps (in my experience).

The Classic II motherboard can be recapped if you are fairly skilled but can be tricky.

Here are some before/after recap pics:

http://68kmla.net/forums/viewtopic.php?f=7&t=10886

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Re: thanks. It works but is sound

The Classic II motherboard can be recapped if you are fairly skilled but can be tricky.

Thanks! Last time I fixed an SE/30 but the foil trace are a nightmare!

Ben

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Re: thanks. It works but is sound

The Classic II motherboard can be recapped if you are fairly skilled but can be tricky.

Thanks! Last time I fixed an SE/30 but the foil trace are a nightmare!

Ben


Yep, the traces can be annoying. x_x

Just a note that the Classic II board is kinda cramped, so you need to add some extra care.

Check the motherboard for any obvious leakage (a Coke-like dried liquid on the board, corroded pins, etc.) If you run into corrosion/leakage, use a old toothbrush and soap or Q-tips and rubbing alcohol to remove it.

-J

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JRL, that may be the most dis

JRL, that may be the most distracting avatar I've ever seen.

Supposedly you can put the motherboard in the dishwasher and let it dry for a couple of days to clean it off and do a temporary fix.
http://www.applefritter.com/node/21584

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the sound problem also in an SE/30

The sound in this SE/30 is very low both the internal and the external. It is low but clean and without noises. Time for a recapping round?
Ben

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Hawaiian Cruiser: Thanks! ...

Hawaiian Cruiser: Thanks! ...if you mean that in a good way. Blum 3

bengi: Yeah, it's a good time for a recap. Try adjusting the sound in the sound control panel first (yeah, kinda obvious, I admit)

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Re: Hawaiian Cruiser: Thanks! ...

Hawaiian Cruiser: Thanks! ...if you mean that in a good way. :p

it is quite long as you can't tell when the loop starts! Good job! Wink

bengi: Yeah, it's a good time for a recap. Try adjusting the sound in the sound control panel first (yeah, kinda obvious, I admit)

Okay. Summer is over, will probably find some free time during the long winter afternoon... while waiting for the third kid, this time a girl!

Ben

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Hehe, I found it online. If y

Hehe, I found it online. If you're curious about the dancing guy, he's from Karateka (which was released for the II series, although those sprites are from the NES version).

Check this thread over at 68kmla: http://68kmla.net/forums/viewtopic.php?f=4&t=4884

This guys sells tantalum replacement capacitor sets for the SE/30. The difference between tantalum and other (electrolytic, radial) caps that you may find is pretty nice; these are better.

Also, congratulations on the new baby girl! Biggrin

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Re: Hawaiian Cruiser: Thanks! ...

finailly today, one year later, I manged to replace the caps and sound is back, the responsible caps are those close to the sound out jack,

Ben

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Some compact Macs restorated!

Last winter, I profited by some spare time, and went back to fix some analog boards. In these months I ended up restoring the following things:
Mac Classic with a Techworks 40 MHz 68030 accelerator (Classic 68030 40MH)
two Classic II (Classic II)
one Classic still in its original configuration (System 6.0.7, 1 MB RAM) which seems brand new, that was saved from a dump and seems brand new.

This is the last one:

Macintosh Classic 6.0.7

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Macintosh classic Ram

I am just wonding if ram from a macintosh SE or macintosh color classic will work with a macintosh classic ii?

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