Date   : Sun, 06 Apr 2008 18:28:34 +0100
From   : acorn@... (Andy Ford)
Subject: Help with 'B' video output (only mode7 working)

I think I will just solder to the IC leg then to be honest. I was asking 
as I thought there might be a more (top side) accessible position. I 
have soldered to IC legs before so am aware of the process (i.e. speed 
and care!) needed to prevent damage.

Thanks again for the speedy reply. I think another machine may have a 
similar issue too.. I need to look at that in detail though first to see.

Andy. :)



Pete Turnbull wrote:
> On 06/04/2008 17:30, Andy Ford wrote:
>   
>> Many thanks Peter.
>>
>> I looked and it is a 2023, so I removed the jumper and temporarily 
>> connected the middle pin of S26 to pin 1 of IC10. Result = Perfect 
>> picture! :)
>>
>> I have just made a small wire (soldered a jumper to one end for just 
>> clipping onto the middle of S26. I wonder if you know whether I should 
>> solder directly to the IC leg (does not seem wise to me, but I can 
>> solder carefully) , or whether there is somewhere nearby that I could 
>> use. I notice that the track for pin 1 of IC10 is not on the top.
>>     
>
> The recommended method is to get a short piece of wire-wrap wire or 
> similar very thin wire, and solder it on the *underside* of the board, 
> between IC6 pin 26 and IC10 pin 1.
>
> If you don't want to do it on the underside, if the wire is very thin, 
> you might be able to poke it into the same hole as IC10 pin 1, or IC11 
> pin 1, or IC38 pin 11.  Providing you don't hold the soldering iron on 
> the IC leg too long, soldering to the leg isn't likely to be a problem.
>
>