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I've got a few SE and SE/30 boards with broken clips on the Simm sockets. What would be the best option to remove these from the logic board without lifting traces or damaging the PCB ? I have a desoldering station but I don't think this will work as the Simm sockets come in pairs so there are...

The hard drive's heads are probably stuck in the parked position. Then you typically hear it spin up and down 1 or more times before it goes silent. I haven't seen this due to a dead pram battery. If you doubt: turn it off and immediately back on. Then the capacitors are still charged.

As for the powerbook 140: you can swap the daughter card from a PB170: that will give you a 25 Mhz 68030 instead of 16 Mhz. You can go for a 33 Mhz CPU but then you have to take the daughter card and the interconnect board of a PB165.

Adjusting the head is in most cases not necessary. Make sure your drive is complete: check that the pressure pad is still there. Without that, the drive will never work. Here's how to clean and lubricate the drive. - Remove the complete top assembly that holds the floppy disc ( release the...

It's repaired. It was an open R55 resistor :)

Definately not a bad solder joint. You can wiggle and tap the Analog board as much as you want, once it's ON no problem. This will be a very time consuming job to get it repaired as I could not find the Schematics for the board ( it's the Internation, 240 Volts version, not the USA model ). I...

I have something weird going on with a Mac Plus Analog board that I recapped. I regrettably didn't power it on before I recapped the board but last time, a few weeks ago, it was still working though. After replacing the capacitors, it didn't want to power on anymore. I triple checked the...

I really can't recommand a TV repair place. They are not used to soldering small SMD components, they just replace whole boards. I have repaired a Classic II and SE/30 board for a friend of mine who did his boards in a TV repair shop in France: the SE/30 was messed up and they succeeded to lift...

The "overmentioned fixes" are the only solution. Electrolyte Capacitors degrade over time: that's just basic chemistry. Leakage is not always obvious, they can also dry out or don't leak at all while they are bad. You need an ESR meter for testing capacitors. Since your performa 475 is at least...

When a hard drive starts spinning up and down at power on, there are 2x obvious reason. Either the heads are stuck in the parked position and repeated attempts free them. Other possibility is that the PSU is not giving enough power, probably due to failing capacitors. Given the age, both the...

L2 is a variable inductor. I have never seen this piece for sale on Mouser, Farnell, Digikey,... Digikey sells variable inductors but as far as I can see, not one that can replace L2 If the plastic isn't broken, best chance is to look for a replacement coil. However if you say that the coil...

I don't recommand cleaning boards with water. Use pure or at last 98% pure Isopropyl alcohol: this evaporates almost immediately and is good for cleaning and removing fluid from leaking capacitors. Here's how I work - remove the old capacitors - remove all old solder from the pads - fully...

I have seen a 157-0026 flyback on a Mac Classic II Analog board I recently recapped. It looks identical to the 157-0042C.

It's regrettably true that most electronic shops don't do these repairs anymore. It's a time consuming job and you need a good soldering and de-soldering station to repair the boards, which is expensive, and of course you need the skill as well to work with them. Next to soldering equipment...

The only solution to get your IISi working again and running stable is to recap the logic board and the PSU. I have already done this with most of my 68K Macs. You will be surprised when you open the PSU and see the condition of the capacitors inside. Good Luck, Nico

I took some pictures of a recapped Mac Plus Analog board ( before and after ). I mistakenly posted them in this topic: http://68kmla.org/forums/viewtopic.php?f=7&t=18578#p176231 Sorry...

As promised, here are the photos of my recapped Mac Plus Analog Board. Before: After:

The list is an inventory I made myself before I started repairing the boards. However for the 128K/Plus Analog board one has to keep in mind that here in Europe, we use the International 230 volts version: it can be different from the 120 volts model for the USA. I can't tell as I don't have...

Hi, I've been looking for on Farnell, Digikey, Mouser, Google, Ebay,... you name it for a 620uf 400v snap-in capacitor ( D=40mm, H=42mm ). It's in the Sony PSU of the Mac SE series. I could find a 680uf, 400v snap-in but I don't know if it's a good idea to replace it with this value...

I will take some photos this weekend and post them. There's isn't much difference between before and after: just the color of the new capacitor is sometimes different than the original one but that's about it. I have choosen for capacitors with higher voltage so they look almost identical to...