Date   : Mon, 04 May 2009 18:47:30 +0100
From   : tbkc@... (naz sajid)
Subject: faulty floppy drives

The teac is a 5.25" drive so ist it possible to play with the jumers for
7271 compaqtibility? If so, how?

 

> It sounds like the soldering has failed on the power connector. In which case, 
> it's a five minute fix for anyone with a soldering iron and a roll of solder.


 

thats what I thought and used a tester to check for continuity between the
pins and the connections on the PCB so I don't think its a dried joint etc.
Is it still not possible, from the info, that the capacitor is faulty?

 

If your 110% sure then i'll have another go.


 


 
> Date: Mon, 4 May 2009 13:06:28 +0100
> From: philpem@...
> To: tbkc@...
> CC: bbc-micro@...
> Subject: Re: [BBC-Micro] faulty floppy drives
> 
> naz sajid wrote:
> > The 4pin power connection needs to be
> > moved and it starts working(sometimes). Problem is that when the power 
> > connector is moved from side to side, and assuming the load command is 
> > given on the bbc, the led lights up and a clicking sound can be heard, 
> > but when I let go, the drive doesn't light up. So using this method is 
> > hit and miss.
> 
> It sounds like the soldering has failed on the power connector. In which case, 
> it's a five minute fix for anyone with a soldering iron and a roll of solder.
> 
> > Also, is there anyone who can fix faulty 5.25 drives no matter what the 
> > fault?
> 
> Depends. A lot of the older drives have (or had) service documentation 
> available, but parts like the controller ICs and heads are no longer 
> available. Something simple like a failed resistor or diode can most likely be 
> fixed, but anything else is unlikely to be repairable.
> 
> > I also have a teac 55. It runs ok on a 1770dfs but not on a 8271. Any 
> > idea on how to make it 8271 compatible?
> 
> If that's a 3.5" drive, then IIRC there's some sort of issue with modern 
> drives and the 8271 controller. So basically, it's not going to work without 
> some modification to either the drive or the machine. Unfortunately I can't 
> remember what the issue is (probably on account of the only BBC machine I have 
> being a Master 128, which has a 1770 controller).
> 
> -- 
> Phil.
> philpem@...
> http://www.philpem.me.uk/

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