Re: My Lisa need help !

From: simon <simski_at_email.domain.hidden>
Date: Thu, 4 Nov 2010 08:39:17 +0100


don't short it, cut one wire to it. shorting is electrically the same as a leak for capacitors.

On 3-nov-2010, at 14:24, Bernard wrote:

>> Correct. C8, together with R2, generates the reset pulse for the CPU.
>> Very often this capacitor gets leaky, and then /Reset is asserted
>> infinetly. You see a stripe pattern or checkerboard on the screen.
>> Without C8 you won't get the reset pulse, but the line is free so you
>> can use the pushbutton to start the CPU.
>
> So i have short circuited the C8 capacitor.
> I had the very same pattern on the screen that before :
> http://i55.tinypic.com/2a77tys.jpg
>
> As i press the reset button, the screen goes black and as i released
> it is right away (1/15 sec) back to the same pattern.
> It is so fast that i don't think that anything reset.
>
>
> What next ? :)
>
> Bernard
>
> --
> -----
> You received this message because you are a member of the LisaList
> group.
> The group FAQ is at http://lowendmac.com/lists/lisa.html
> To post to this group, send email to lisalist_at_email.domain.hidden
> To leave this group, send email to lisalist
> +unsubscribe_at_email.domain.hidden
> For more options, visit this group at http://groups.google.com/
> group/lisalist

  --
Groeten,

Simon
simski_at_email.domain.hidden

-- 
-----
You received this message because you are a member of the LisaList group.
The group FAQ is at http://lowendmac.com/lists/lisa.html
To post to this group, send email to lisalist_at_email.domain.hidden
To leave this group, send email to lisalist+unsubscribe_at_email.domain.hidden
For more options, visit this group at http://groups.google.com/group/lisalist
Received on 2015-07-15 16:50:14

This archive was generated by hypermail 2.4.0 : 2020-01-13 12:15:15 EST