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The 6502 CPU (An 8Bit CPU) is the biggest (longest) chip on the board. Should be right under the slots.

:-/ So my constant use of my Palm 1000 on my PB5300 & Duo2300 counts?

Look at the computer chips on the board and you will find 2 sets of numbers on it. 1 number is the Chip Family - like 6502 (for the CPU). Then there is a 4 digit number, something like 2283. in this example - 2283 is the date code which reads as "The 22nd week of the year 1983." this would make...

Like Gorgonops says, it's a typo.  Clicking on the image its a MC68EC030FE25C.... making it a 25MHz CPU. Even it if is made by Freescale.

a2s2064 is the model number, that's a given. I'm guessing, Oct/Nov of '88. This is just a guess, as I do not have the serial number list or formula to determine that. You opened her up and checked the Chip Date Codes and see if it a 6502 or 65C02 in it?

C7 where? IIsi Logic Board? Mac Con 30ie Card? Powersupply? Make sure that it is a non-polarized Tantalum Cap or as Scotty would say , "That's too much power! She's gonna blow!"

Yup, its yellow and standard. But that connector may not fit all hard drives, especially non-standard Mac Drives.

That adapter went on to the machine's '030 CPU Socket, which most had. There were a few that had the CPU soldered in, so you were out of luck on those systems. My Original SE\30 Logic board is socketed but, its replacement board has the CPU soldered in. My Original SE\30 I could not bring back...

Like CelGn stated, the Apple ImagWriter (1) printer is not parallel. It is serial, using a DB-25 Serial Connector. It looks like a Parallel Connector but it is not. And it cannot connect to AppleTalk/LocalTalk or to a network directly. Macs (of the time - the 128K to the 512Ke) used DB-9 Serial...

Has to be an early ad, as the IIcx had the Reset/Programmer's switch as a separate add-on for a long time as did the IIci in its early years. It was not until later that both the IIcx & IIci get the Reset/Programmer's switches. My original IIcx (still have it) does not have it but my later...

This is good to know. I remember back in the day  microphones with a remote switch to turn the tape deck on and off had the 1/8th jack for the audio and a smaller one for the remote in a 2-prong configuration. I knew about the TRS80 Model I's and III's having the control as a friend had one...

On all System 6 and most System 7, there was a System Build option for "System for this Mac" and "System for ANY Mac." Use the latter for building a Bootable Zip Disk for the Plus and put the Zip Drive drivers into the Extensions Folder (in System 7). The System for any Mac, trims out a lot of...

Talk to Paralel and 360Alaska about their Classic II FPU Card they designed and built. A nice machine like that should have one. https://68kmla.org/forums/index.php?/topic/23149-classic-ii-fpurom-card/page-3&do=findComment&comment=284460

In the 8Bit world, both the Atari and Commodore had On/Off Motor control of the tape deck, the Apple and I believe the Coco did not. If there is an error in reading the tape, the Commodore and Atari would end the power to the motor, the Apple and I believe the Coco would not because they can not...

I agree with Bibilit - clean and recap the board. I would also question what type of floppy is that and where was it created? If it is a 1.4MB disk formatted as an 800K disk, it is not going to work 100% of the time, maybe 50% of the time will it work. And if it is formatted on a PC, then it...

Where did you get both Systems? Using the copy that is for the SE will not always work with the Plus because of the added or changed hardware these two machines have. You wold have to get the "original" install disks and make it on the Plus for it to work. Making it on the SE and then...

You need a NOS 68040, not a cheap Chinese clone that they claim is something it is not. There many horror stories, including a few here where the CPU/FPU was replaced and "BOOM!!!!" In fact one of them was in the FPU for the Classic II a couple of daring young members' here created and sold to...

My answer, if you read it, is to check your volume on the tape deck. It should be less than 75% but more than 25% in volume's loudness. Too loud, and the Apple will ignore it and give you an error. Too soft and it will not be heard and the Apple will give you an error. What I did not mention or...

Magnetic Torx? Don't worry about it. Its only 4 screws (5 on the Plus) and not near of any place of importance or containing metal to effect anything. Always be cautious and respectful of your tools and the items you are repairing. It is a good habit to have. Without the bucket back of the Mac...

Most of the time it is the PSU. Sometimes it is that 10-cent fuse that goes out that takes down a $10,000 machine. You need to check the boards on a good Lisa, clean out the cage and sockets in the cage and the edge comb on the boards. Check the memory board first and get them out of the way...