In a message dated 12/08/02 12:57:12 GMT Daylight Time, [EMAIL PROTECTED] writes:
On Sun, 11 Aug 2002 at 10:55:20, wrote:
(ref: <[EMAIL PROTECTED]>)
>In a message dated 11/08/02 15:37:49 GMT Daylight Time,
>[EMAIL PROTECTED] writes:
>
>
> It was me collecting different build-standards of the QL. Here's a
> link to a
> web-page
> summarizing my collection:
> http://mypage.bluewin.ch/QLvsJaguar/QLBuild-Standards_PCB-Issues.html
>
>
>
> Issue 2 is not known to me to exist, so please give me more infos.
> It would
> be great
>
>
>It may not be issue 2 - it is very hard to read the writing on the PCB
>if not impossible!!
Issue number is in copper under the UHF modulator as well as on the top
in ink by CTRL ports.
Hmm... not sure - have not taken board out of machine to look underneath just yet!!
>However, looking at your web-pictures, I cannot see anything similar.
>
>This one has had a few changes to it, which does not help - a very
>early mouse interface is attached, saying Iss 1 Mouse Adapter - a small
>circuit board on various leads connected to the circuit board by the
>8302 and the resistors near the 8049.
>It does not work at the moment (no keyboard to try it anyway!!),
You can 'press' F1 easily using a joystick, or even connecting the
relevant pins on the kbd connector direct.
> but
>when I got it, I noticed the JM ROMs were the wrong way round (JM-0000
>on the right of JM-0008).
Doesn't matter.
> I have swapped these for AH ROMs.
>A lot of the capacitors are different from later versions (there are
>plain bronze in colour) and the row of resistors to the right of
>AH-0008 socket actually have some wire links in place of the resistors
>JU2, JU3 and JU4.
These 'resistors' were in fact zero ohms - ie wire links.
That is why they had one black bar == 0.
>
>The only other obvious changes are that there is a heavy duty wire link
>with resistors/capactors (not sure which) from pin 10 of the 8302 (on
>the left hand side) to pin 20 on the right hand side of the 8302 (top
>right corner) and then across to the large blue capacitor just above
>the 8049 chip!!
What is 'top right corner'? (8-)#
Your pin numbering sounds wrong.
--\/--
pin 1-> | | <- pin 40
| |
| |
pin 10-> | |
| |
| |
pin 20-> | |
------
Is that what you meant?
Yes, it joins pin 10 and pin 40 with a wire link and a component labelled 13 ITT, then another wire link from pin 40 to the left hand side of capacitor 25 (think it is +ve - the end arrow points to) That has a component labelled RS 022 250v.
+ve or GND on the capacitor?
> Oddly, the black wire which normally trails from under
>the heat sink and ends up near the keyboard membrane is missing...
That was to get a better 5V to ram.
If that is not there, it does sound like an early version.
Hmm sounds interesting thing to miss off then...
Rich Mellor
RWAP Software
7 Common Road, Kinsley, Pontefract, West Yorkshire, WF9 5JR
TEL: 01977 614299
http://hometown.aol.co.uk/rwapsoftware
