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How to dismantle a CPC 6128 and replace the drivebelt

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1st. step:

Remove the screws on the bottom of the CPC 6128. After havin done so, remove the 2 black screws on the right side of the case, that's where the floppy drive is.

2nd step:

Lift the upper half of the case up, but only on the right side, where the floppy drive is. You have to do it this way, because on the left side there are the connectors that connect the Keyboard of the upper case with the circuit board in the lower case.

In the end, the upper half of the case should make an angle of 90° with the lower half. Have someone hold it that way, or lean it against something.

In the following picture, I already removed the connections, after that the whole thing should look like that:

If you just want to replace the drivebelt, you don't need to remove the heatsink, but if you want to work on the circuit board, you have to remove the screws that are in the places I marked in the above picture.

Furthermore, you have to bend up the metal tongues that hold the heatsink in place. I also marked them in the above picture.

After that, your CPC 6128 would look like that:

3rd step:

On the right side, you have to remove 2 more screws that hold the floppy drive in its place. Then carefully remove the power cable and the data cable from the floppy drive. It's quit obvious.

The next picture shows the inner side of the circuit board of the floppy drive, already taken from the drive.

4th step:

In order to remove it completely as I did, you have to take out 2 plugs which are in the white sockets of the upper right corner in the picture.
Then you have to remove a black plug near the cables shown on the bottom side of the pictures. That may be done easier when you unscrew the cables seen on the picture first. They are attached to the drives motor with the black thing with the hole on the lower right corner of the picture.

When you have done all that, you can take away the circuit board. Be carful, don't damage the LED seen on the upper left side of the picture. It sticks in the floppy drives front panel, it is the red light you see when the floppy drive is in operation.

After the circuit board is out of the way, the lower side of the drive should look like this:

You see the drivewheel on the lower left side and the flywheel rather in the middle of the floppy drive.

5th step:

Next to the upper left corner of the floppy drive you can see the remains of the former drivebelt.

Now you can just slip over the new drivebelt. This may be done by putting it on the drivewheel and turning the flywheel while pressing the drivebelt onto it. It will slip in place all by itself.

6th step:

Then you reassemble the whole stuff in the reverse way, and you should have a working CPC 6128 again.

Here are a few extra - pics.

The upper half of the CPCs case, with the keyboard still attached. One can see the flat cables that connect the keyboard to the maincircuit:

They look harder to insert than they do. No need of much force, they just slide into the connectors on the main circuit when easily pressed into them.

Also seen: the blue/black cable, that connects the "speaker" to the circuit board, and a piece of the white/black cable, that transfers the power to the red power-on light.

In the next picture, the lower side of the power-switch is to be seen.

The metal clamps hold it together. If the switch should malfunction, as on my CPC 464, you just bend away 2 clamps on one side, then you can push the other two clamps from the switches corpus and access its interior.

After the operation, the clamps can be bent back so the switch is held together again.

Topic pinned, thanks for the thorough guide! Care taking it into a wiki article, too?

I'd be happy to see it spread whereever CPC - friends may see it. :)

I think about adding some more photos.

Anyone who can make use of any of the photos in own contributions is hereby permitted to do so.

I seem to have a different drive - it has one white connector on each side (left and white), and two or three hardwired ones - looks like its gonna be quite hard to replace :(

EDIT: When fiddling, a brass-looking pin fell out from god knows where. Where is this from, and would it matter if it doesn't go back?

Could you tell which drive you own ? It's code is probably on a sticker and begins with "EME".

The pin is very probably responsible for detecting wether a disc is write protected or not. Sadly, I don't own such a drive, so I can't do any photos to show you where the pin has to be.

But is very likely you find some kind of microswitch on the circuitboard of the drive. The pin would be located above that, so it would press it when a disc is inserted.

Perhaps you can make a photo of the circuitboard of your drive, the drives body and the pin ?


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