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IIsi CAP kit ordered...


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Well, after my experience with my Mac Classic, where I opened it up to check the battery and found CAP corrosion, I knew it was time to check the IIsi.

As I mentioned in the other thread, there was some damage on one of the pads under a CAP on the Classic, but it appears to have cleaned up nicely and I was still able to solder on the new CAP and it is working.  Whew.

So I got nervous about my IIsi.  That, and the pics/videos of exploding batteries had me freaked out.  So I opened it up.

Good news is that the battery didn't explode and doesn't even look to have leaked.

I didn't do too close a look at the CAPs.  The initial visual of what I could see looked OK.  But that was the same with my Classic till I really looked.

I decided to hook up and plug in the IIsi and see what it would do.

Good news is that it booted up all the way to the desktop.  So that is good.

I did notice there is no sound, which I believe is/could be a sign of CAP issues.

So I ordered another CAP kit which is on it's way.  Man, the IIsi has a LOT of CAPs!!!

 

Hopefully with a good cleaning and some new CAPs, it will be happy and with sound.

Note:  I ordered a kit for the motherboard.  I know there can be issues with CAPs on (some? Sony?) PSUs, so I need to check that when I take it apart again and see if I need to replace some CAPs there too.

 

Also, it has 17M RAM.  Right now, I am thinking that is probably plenty for him???  I know he can take more, but not sure if that is worth it.

I am considering a 50mhz crystal to get him to 25mhz.

 

The boot up time seems slow, but I think that is mostly the SCSI hard drive and System 7.5.3 (and those extensions)...

 

Also, I noticed that the IIsi has the extra reverse power plug for attaching a monitor, but my monitor has a standard plug on him, hardwired.  I'm sure there are probably adapters for that if I want to do that.  (I know I can just plug them both in and/or use a power strip, but.. ;-) )

 

Anyway, after my Classic seemingly successful repair, I am more confidant.  I hadn't used the hot air side of my hot air/solder station before and that worked great to remove the CAPs on the Classic.

So, fingers crossed.

 

There is something about the 8Mhz B/W Classic that I really like and I use him more.  But my IIsi does have ethernet, which is a huge plus.  :-)

(I just realized I hadn't tested the IIsi floppy drive..  Need to do that also...)

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I successfully recapped a IIsi power supply recently, the following resources were really helpful:

 

   Recapping A Macintosh IIsi Power Supply (PSU) - Paul's Old Crap (YouTube Channel - Paul's Crap):

   https://www.youtube.com/watch?v=Tknr_9UdsIc

   Thanks @netfreak !

 

   Recapping a Macintosh IIsi Power Supply (YouTube Channel - Branchus Creations):

   https://www.youtube.com/watch?v=YNsPr1mHUrw

   &

   Recap-a-mac - Macintosh IIsi Power Supply:

   http://recapamac.com.au/macintosh-iisi-power-supply/ (Awesome Hi-Res annotated board pictures!)

   I think he's a member here but not sure who :-), Thanks!

   

I spent a lot of time measuring the old capacitors and searching through Mouser's site to try to find the best fit with my admittedly pretty rudimentary understanding of what's important to match up beyond the capacitance, voltage and type.

Here's the parts list I put together/ordered/successfully used:

 

IIsi Power Supply (Sony)

Qty x Cap µf x  Cap V - Cap Type (Cap Board ID(s)) - Measured Cap Diameter x Measured Cap Length :: Mouser Part # - Part D x Part L - Cap Life Rating
2 x 220µf x 250v - Radial (C101, C102) - 19D x 35L :: Mouser 647-UCS2E221MHD - 18D x 31.5L - 10000 Hour
2 x 2200µf x 6.3v - Radial (C202, C203) - 10D x 30L :: Mouser 647-UPJ0J222MPD - 10D x 31.5L - 5000 Hour
1 x 100µf x 10v - Radial (C106) - 4D x 10L :: Mouser 647-ULD1A101MDD1TD - 5D x 11L - 10000 Hour
2 x 220µf x 16v - Radial (C221, C222) - 9D x 12L :: Mouser 647-UPJ1C221MPD - 8D x 11.5L - 5000 Hour
2 x 1200µf x 16v - Radial (C211, C212) - 10D x 30L :: Mouser 647-UPW1C122MPD - 10D x 25L - 5000 Hour
1 x 47µf x 25v - Radial (C402) - 4D x 12L :: Mouser 647-UHE1E470MDD - 5D x 11L -5000 Hour
1 x 100µf x 25v - Radial (C401) - 6D x 12L :: Mouser 647-UHE1E101MED1TD - 6.3D x 11L - 5000 Hour
1 x 56µf x 35v - Radial (C302) - 6D x 12L :: Mouser 647-UHE1V560MED1TD - 6.3D x 11L - 5000 Hour
1 x 4.7µf x 400v - Radial (C105) - 10D x 20L :: Mouser 647-UPW2G4R7MPD - 10D x 20L - 5000 Hour

 

IIsi Power Supply (Sony) - Daughter Card: 

Qty x Cap µf x  Cap V - Cap Type :: Mouser part # - Case Size Code 
1 x 3.3µF x 35V - SMT :: Mouser 581-TAJB335K035SNJ - Size B
1 x 100µf x 6.3V - SMT :: Mouser 581-TAJC107K006R - Size C

Edited by Fizzbinn
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  • 5 months later...
On 3/24/2020 at 8:50 PM, Fizzbinn said:

I successfully recapped a IIsi power supply recently, the following resources were really helpful:

 

   Recapping A Macintosh IIsi Power Supply (PSU) - Paul's Old Crap (YouTube Channel - Paul's Crap):

   https://www.youtube.com/watch?v=Tknr_9UdsIc

   Thanks @netfreak !

 

   Recapping a Macintosh IIsi Power Supply (YouTube Channel - Branchus Creations):

   https://www.youtube.com/watch?v=YNsPr1mHUrw

   &

   Recap-a-mac - Macintosh IIsi Power Supply:

   http://recapamac.com.au/macintosh-iisi-power-supply/ (Awesome Hi-Res annotated board pictures!)

   I think he's a member here but not sure who :-), Thanks!

   

I spent a lot of time measuring the old capacitors and searching through Mouser's site to try to find the best fit with my admittedly pretty rudimentary understanding of what's important to match up beyond the capacitance, voltage and type.

Here's the parts list I put together/ordered/successfully used:

 

IIsi Power Supply (Sony)

Qty x Cap µf x  Cap V - Cap Type (Cap Board ID(s)) - Measured Cap Diameter x Measured Cap Length :: Mouser Part # - Part D x Part L - Cap Life Rating
2 x 220µf x 250v - Radial (C101, C102) - 19D x 35L :: Mouser 647-UCS2E221MHD - 18D x 31.5L - 10000 Hour
2 x 2200µf x 6.3v - Radial (C202, C203) - 10D x 30L :: Mouser 647-UPJ0J222MPD - 10D x 31.5L - 5000 Hour
1 x 100µf x 10v - Radial (C106) - 4D x 10L :: Mouser 647-ULD1A101MDD1TD - 5D x 11L - 10000 Hour
2 x 220µf x 16v - Radial (C221, C222) - 9D x 12L :: Mouser 647-UPJ1C221MPD - 8D x 11.5L - 5000 Hour
2 x 1200µf x 16v - Radial (C211, C212) - 10D x 30L :: Mouser 647-UPW1C122MPD - 10D x 25L - 5000 Hour
1 x 47µf x 25v - Radial (C402) - 4D x 12L :: Mouser 647-UHE1E470MDD - 5D x 11L -5000 Hour
1 x 100µf x 25v - Radial (C401) - 6D x 12L :: Mouser 647-UHE1E101MED1TD - 6.3D x 11L - 5000 Hour
1 x 56µf x 35v - Radial (C302) - 6D x 12L :: Mouser 647-UHE1V560MED1TD - 6.3D x 11L - 5000 Hour
1 x 4.7µf x 400v - Radial (C105) - 10D x 20L :: Mouser 647-UPW2G4R7MPD - 10D x 20L - 5000 Hour

 

IIsi Power Supply (Sony) - Daughter Card: 

Qty x Cap µf x  Cap V - Cap Type :: Mouser part # - Case Size Code 
1 x 3.3µF x 35V - SMT :: Mouser 581-TAJB335K035SNJ - Size B
1 x 100µf x 6.3V - SMT :: Mouser 581-TAJC107K006R - Size C

I really appreciate the part numbers.  I have created a Mouser Project / Shopping cart using your recommendations.   If someone will test this link and double check my accuracy it will save future users time by being able to click on the link and have a ready filled shopping cart.

 

IIsi Power Supply shopping cart for Mouser

 

:-) Bama

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8 hours ago, Bama said:

I really appreciate the part numbers.  I have created a Mouser Project / Shopping cart using your recommendations.   If someone will test this link and double check my accuracy it will save future users time by being able to click on the link and have a ready filled shopping cart.

Your welcome! Your ask for a double check was a good idea cause I made a mistake on one of the tantalums...

 

IIsi Power Supply (Sony) - Daughter Card: 

Qty x Cap µf x  Cap V - Cap Type :: Mouser part # - Case Size Code 
1 x 3.3µF x 35V - SMT :: Mouser 581-TAJB335K035SNJ - Size B
1 x 100µf x 6.3V - SMT :: Mouser 581-TAJC107K006R - Size C

1 x 33µf x 25V - SMT :: Mouser 581-TAJC336K025RNJ - Size C <-- the correct one

 

I copied the wrong line when I was making that list, the 3.3µF x 35V part is one I ordered to recap my PowerBook 100 LCD...

 

FYI Since I originally posted this I've successfully recapped two more IIsi Sony power supplies with these parts.

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