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General Category => Technical Support - General => Topic started by: Zoe Robinson on 00:02, 30 September 15

Title: DDI-1 not working on a CPC464
Post by: Zoe Robinson on 00:02, 30 September 15
Hi guys.

I'm sad to say that it seems the DDI-1 interface on my CPC 464 has been damaged either during a house move or when it was in storage after the move. The light comes on when I plug in the drive and power up the system but that's as far as anything goes.

The 464 doesn't recognise the |DISK or |TAPE RSX commands and the drive does not activate at all when I try to use it. I can't see any obvious damage (see pics below) on the drive itself or the connector that goes into the back of the CPC but for many years it had to be propped up a little with a pen under the expansion block in order to connect to the CPC through my DkTronics 64k memory expansion, so I suppose this was inevitable in a way.

The drive doesn't do anything and the RSX commands are not recongised even if I don't have the memory expansion plugged in and the DDI-1 is connected directly to the CPC.

I'm not a hardware person, I haven't the first clue what to do to fix this. Any ideas would be appreciated.


(https://farm1.staticflickr.com/583/21201310593_ae23e4fec0_q.jpg) (https://flic.kr/p/yiufZP) (https://farm1.staticflickr.com/626/21831925841_99eed1f4bd_q.jpg) (https://flic.kr/p/zgdjWv) (https://farm1.staticflickr.com/656/21831927631_8be47eae5d_q.jpg) (https://flic.kr/p/zgdktn)
Title: Re: DDI-1 not working on a CPC464
Post by: CraigsBar on 00:17, 30 September 15
Send it to @Bryce
Title: Re: DDI-1 not working on a CPC464
Post by: chinnyhill10 on 06:21, 30 September 15
You given the edge connector a good clean using Isopropyl Alcohol and a swab?
Title: Re: DDI-1 not working on a CPC464
Post by: Bryce on 08:09, 30 September 15
Yup, if it's not recognising the RSX commands then it's probably just dirt on the edge connector as Chinnyhill says.

Bryce.
Title: Re: DDI-1 not working on a CPC464
Post by: Zoe Robinson on 09:28, 30 September 15
Quote from: chinnyhill10 on 06:21, 30 September 15
You given the edge connector a good clean using Isopropyl Alcohol and a swab?


I gave it a clean but maybe I missed something. I'll give it another try.


Thanks, guys.
Title: Re: DDI-1 not working on a CPC464
Post by: gerald on 10:04, 30 September 15
Is the drive unit powered : green led on ?
The interface is powered from the drive.
Title: Re: DDI-1 not working on a CPC464
Post by: chinnyhill10 on 12:24, 30 September 15
I've found with kit that uses edge connectors a good clean and repeated plugging, unplugging you can usually get things working. 30 years of oxide and dirt!
Title: Re: DDI-1 not working on a CPC464
Post by: Zoe Robinson on 09:50, 03 October 15
Well I cleaned the connectors (good grief, the stuff that came off those things!) and plugged the CPC in to test it out.


CLUNK


That's the sound of the monitor dying, I suppose?  :'(
Title: Re: DDI-1 not working on a CPC464
Post by: Bryce on 19:56, 03 October 15
Quote from: Zoe Robinson on 09:50, 03 October 15
Well I cleaned the connectors (good grief, the stuff that came off those things!) and plugged the CPC in to test it out.


CLUNK


That's the sound of the monitor dying, I suppose?  :'(

Or it's telling you it's time to change the belt or clean the heads?

Bryce.
Title: Re: DDI-1 not working on a CPC464
Post by: Zoe Robinson on 13:07, 08 October 15
Quote from: Bryce on 19:56, 03 October 15
Or it's telling you it's time to change the belt or clean the heads?


No, the clunk definitely came from the monitor.


That repair will have to wait, though. :(
Title: Re: DDI-1 not working on a CPC464
Post by: Bryce on 13:15, 08 October 15
Ah, I thought you meant the drive made a clunk. A clunk from the monitor can be quite normal, doesn't have to mean anything bad.

Bryce.
Title: Re: DDI-1 not working on a CPC464
Post by: Zoe Robinson on 18:24, 08 October 15
Quote from: Bryce on 13:15, 08 October 15
Ah, I thought you meant the drive made a clunk. A clunk from the monitor can be quite normal, doesn't have to mean anything bad.


Yeah, the monitor has clunked in the past but unfortunately what has happened this time is that the usual "clunk" noise I've heard for years when I press the power button was louder this time. In addition, there was no high-pitched whine from the monitor that you more feel than hear, and no power was fed to the CPC.


I'm going to have to open the monitor up to find out what's gone wrong. I'm hopeful that it's a simple fix because it was working perfectly last time I used it.
Title: Re: DDI-1 not working on a CPC464
Post by: Bryce on 08:22, 09 October 15
Ooo, no power to CPC and no whine probably means that the input transformer has left the party.

Bryce.
Title: Re: DDI-1 not working on a CPC464
Post by: AMSDOS on 10:21, 09 October 15
Quote from: Zoe Robinson on 18:24, 08 October 15
I'm going to have to open the monitor up to find out what's gone wrong. I'm hopeful that it's a simple fix because it was working perfectly last time I used it.


Not a good idea opening it up and playing with 240v (especially if you're not a hardware person).  :o 


Leave it to a TV repair person if you can, hand them a Service Manual.
Title: Re: DDI-1 not working on a CPC464
Post by: Bryce on 10:33, 09 October 15
Quote from: AMSDOS on 10:21, 09 October 15

Not a good idea opening it up and playing with 240v (especially if you're not a hardware person).  :o 


Leave it to a TV repair person if you can, hand them a Service Manual.

240V is peanuts. It's the 20KV coming out of the HT Transformer that Zoe should be worried about. :)

Bryce.
Title: Re: DDI-1 not working on a CPC464
Post by: AMSDOS on 10:38, 09 October 15
True it's not the Volts that kills you, what is it? The amps or the watts? I cannot remember.
Title: Re: DDI-1 not working on a CPC464
Post by: Bryce on 10:46, 09 October 15
That old phrase - "It's not the volts that kills you, it's the amps" is complete rubbish as it's a combination of both and it also depends heavily on whether it's AC or DC (they kill you using different methods).

Bryce.
Title: Re: DDI-1 not working on a CPC464
Post by: AMSDOS on 10:54, 09 October 15
Quote from: Bryce on 10:46, 09 October 15
That old phrase - "It's not the volts that kills you, it's the amps" is complete rubbish as it's a combination of both and it also depends heavily on whether it's AC or DC (they kill you using different methods).

Bryce.


Well I knew both were required to make it fatal.
Title: Re: DDI-1 not working on a CPC464
Post by: CraigsBar on 10:56, 09 October 15
So long as AC/DC does not kill you, well not a normal volumes anyway.
Title: Re: DDI-1 not working on a CPC464
Post by: Bryce on 11:17, 09 October 15
Quote from: CraigsBar on 10:56, 09 October 15
So long as AC/DC does not kill you, well not a normal volumes anyway.

Or Phil Rudd hasn't tried to have you knocked off!? :D

Bryce.
Title: Re: DDI-1 not working on a CPC464
Post by: Audronic on 11:45, 09 October 15
Quote from: AMSDOS on 10:38, 09 October 15
True it's not the Volts that kills you, what is it? The amps or the watts? I cannot remember.


It does not matter Your Dead ?? :P


Ray
Title: Re: DDI-1 not working on a CPC464
Post by: Zoe Robinson on 16:40, 09 October 15
Quote from: Bryce on 08:22, 09 October 15Ooo, no power to CPC and no whine probably means that the input transformer has left the party.

Yeah, I was thinking something like that. :(

Quote from: AMSDOS on 10:21, 09 October 15

Not a good idea opening it up and playing with 240v (especially if you're not a hardware person).  :o 

Leave it to a TV repair person if you can, hand them a Service Manual.

Nah, I'm going to hand it to my wife and give her puppy dog eyes until she fixes it. She's the hardware person in the family, she'll know what to do. :D
Title: Re: DDI-1 not working on a CPC464
Post by: AMSDOS on 21:58, 09 October 15
Quote from: Audronic on 11:45, 09 October 15

It does not matter Your Dead ?? :P


Ray


(http://www.classicrockforums.com/forum/images/smilies/0038.gif)
Title: Re: DDI-1 not working on a CPC464
Post by: AMSDOS on 22:02, 09 October 15
Quote from: Zoe Robinson on 16:40, 09 October 15

Nah, I'm going to hand it to my wife and give her puppy dog eyes until she fixes it. She's the hardware person in the family, she'll know what to do. :D


(http://www.classicrockforums.com/forum/images/smilies/dog20oddie20panting.gif)
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