DDI1 Clone disaster

[angelcaio]

Hello, I have a DDI1 Clone of Zaxon (Piort Bugag)

Recently I have had problems accessing the floppy discs and I have encountered this disaster.

There is a displaced connecter in the female edge connecter. Seriously, I don't know how it could have happened and that it has only happened to this one.

It looks like pin 29, according to the scheme

https://www.cpcwiki.eu/index.php/Connecter:Expansion_port

Does anyone know how to put the connecter in its place so that it can make contact again?

I don't know how to grab it to pull it

Any idea or any tool to recommend me?

Thank you very much in advance

[St-BeidE(DE/GB)]

You may change the connector ?

Stefan 

[MoteroV4]

It is an Edge connector.
If you have soldering skills you can replace it, they are cheap.

You could also try to unfold the pin to its approximate original position (if it doesn't  broken), using electronics thin tweezers and small clock screwdrivers.

Although I see it more complicated than the substitution, so that this fixing could look good.


https://es.aliexpress.com/item/1005002212044956.html

[Audronic]

Pin 29 is M1

Change the Connector

Good Luck

Keep Safe

Ray 

[angelcaio]

It is an Edge connector.
If you have soldering skills you can replace it, they are cheap.

You could also try to unfold the pin to its approximate original position (if it doesn't  broken), using electronics thin tweezers and small clock screwdrivers.

Although I see it more complicated than the substitution, so that this fixing could look good.


https://es.aliexpress.com/item/1005002212044956.html

Purchased and awaiting its arrival.
Thank you very much.

[eto]

Does the CPC still work when the DDI is connected or would it be a complete failure then?

If that's a pure DDI-1 clone then the M1 signal should not be needed. If the pin is just gone and doesn't cause any short it should not have any impact on its functionality. 

Then it would be a different fault and maybe not related to the connector. 

[angelcaio]

Does the CPC still work when the DDI is connected or would it be a complete failure then?

If that's a pure DDI-1 clone then the M1 signal should not be needed. If the pin is just gone and doesn't cause any short it should not have any impact on its functionality.

Then it would be a different fault and maybe not related to the connector.

CPC464 works and recognizes the drive. It even gives a "disk missing" error if the diskette isn't inserted, but a cat or |dir always says "bad command" error wih the disk inserted.
the disc spins in the meantime

[eto]

CPC464 works and recognizes the drive. It even gives a "disk missing" error if the diskette isn't inserted, but a cat or |dir always says "bad command" error wih the disk inserted.
the disc spins in the meantime

Did you replace the drive belt? 
Does the motor move the head?

See also these threads that talk about the "Bad Command" issue: 

https://www.cpcwiki.eu/forum/amstrad-cpc-hardware/6128-disk-drive-issue/msg11131/#msg11131
https://www.cpcwiki.eu/forum/hardware-related/cpc-6128-returns-bad-command-on-cat/msg215240/#msg215240

[angelcaio]

I tried with varius drives
And this drives work fine in a 6128 in ds1 mode B: drive)
In 464 ds0

[eto]

I tried with varius drives
And this drives work fine in a 6128 in ds1 mode B: drive)
In 464 ds0

Then check out the other posts. There are plenty of faults that can happen including faulty ROM, voltage issues (did you clean the contacts?) or broken traces but the M1 signal was never mentioned.

To be 100% sure you could check if the M1 signal is connected to any IC on the board.

[angelcaio]

I tried with varius drives
And this drives work fine in a 6128 in ds1 mode B: drive)
In 464 ds0

Then check out the other posts. There are plenty of faults that can happen including faulty ROM, voltage issues (did you clean the contacts?) or broken traces but the M1 signal was never mentioned.

To be 100% sure you could check if the M1 signal is connected to any IC on the board.

I tried with varius drives
And this drives work fine in a 6128 in ds1 mode B: drive)
In 464 ds0

Then check out the other posts. There are plenty of faults that can happen including faulty ROM, voltage issues (did you clean the contacts?) or broken traces but the M1 signal was never mentioned.

To be 100% sure you could check if the M1 signal is connected to any IC on the board.

I tried with varius drives
And this drives work fine in a 6128 in ds1 mode B: drive)
In 464 ds0

Then check out the other posts. There are plenty of faults that can happen including faulty ROM, voltage issues (did you clean the contacts?) or broken traces but the M1 signal was never mentioned.

Para estar completamente seguro, podrías verificar si la señal M1 está conectada a algún circuito integrado en

I tried with varius drives
And this drives work fine in a 6128 in ds1 mode B: drive)
In 464 ds0

Then check out the other posts. There are plenty of faults that can happen including faulty ROM, voltage issues (did you clean the contacts?) or broken traces but the M1 signal was never mentioned.

To be 100% sure you could check if the M1 signal is connected to any IC on the board.

It seems that it is not connected to any track 

[angelcaio]

In another CC464 at a friend's house whit my ddi clone exactly the same thing happens 

[angelcaio]

Update
I haven't received the 50-pin edge connectors yet, but I've checked each of the 49 live pins on the edge with the connection on the motherboard, and they all have continuity.

I remembered that the 5.25" drive's Molex connector (B:) sparked, but at the time, I didn't think anything of it. I think none of the drives have worked since then.

Could any component have been damaged?  Can I check something?

Thanks

[eto]

Could any component have been damaged?  Can I check something?

Yes. Please follow the links to forum threads that I posted a couple of messages before. 

In those threads a lot of potential issues and how to fix them has already been discussed. 

[Bryce]

If there was a spark, you probably fried one of the buffer IC's with a static discharge.

Bryce.

[angelcaio]

Thanks. Bryce
According to the original DDI-1 schematic, there are about eight of these components.
I don't know if I'm mistaken, or if they're all the same (74LS240), because some don't have anything written on them.
I've marked the ones I think are the same with a red X in case you can confirm this. I also don't know how to check them or if I should replace them all.
Or buy another DDI Clone model.

Edit. the numbers over the ic's are different  and others are in blanks

[eto]

Thanks. Bryce
According to the original DDI-1 schematic, there are about eight of these components.
I don't know if I'm mistaken, or if they're all the same (74LS240), because some don't have anything written on them.
I've marked the ones I think are the same with a red X in case you can confirm this. I also don't know how to check them or if I should replace them all.
Or buy another DDI Clone model.

Edit. the numbers over the ic's are different  and others are in blanks

They are not all the same. Your picture is very blurry so it's hard to be 100% sure but if you look closely on the ICs you can identify the name on most of them. See picture attached for 3 that I think I could identify on your picture. 

For those that really have no number it's hard to say. You could compare the PCB traces to the DDI schematics and check which connections are similar. Or if you do have an EPROM programmer like the TL-866 you can also use the feature to identify the type of IC.

[angelcaio]

You're right, Brice.
I took a closer look at the photos.
They look like:

SN74LS136N
SN74LS38N x 2
SN74LS74AN
SN74LS240N
SN74LS32N
SN74LS08N
SN74LS132N
SN74LS27N
 
Should I change anything else?

[Bryce]

It will most likely be one of the two on the right hand side (between the 765 and the flat cable socket) that has failed.

Bryce.

[angelcaio]

It will most likely be one of the two on the right hand side (between the 765 and the flat cable socket) that has failed.

Bryce.

Thanks very much,Bryce.
I'm going to order them. When I change them, I'll report