VGA waveform - Page 2

rkauer · 19 June 2008, 02:42

xLpt>en Googlec

Quote:

Originally Posted by Boot_WB

@Zetro

They certainly have the same pinout, which would suggest that they are the same spec.

I fear you are right my friend, in which case I've got the choice of either trying to find another dead A1200 motherboard, or sacrificing a working one to repair the scandoubler.

Methinks I might remove the DAC temporarily from a working a1200 to test the scandoubler - I can always replace it later once I find a replacement.

For now, I'll carry on working my way down this nice bottle of ale.

Mmmm... Riggwelter!

Why not try Futurlec or other parts supplier? Those DAC are not rare, do you know?

Zetr0 · 19 June 2008, 02:47

me and my friend Jack Daniels are having a night in, hopefully trying to pickle this flu out....

heres futurlec's list of DAC's

rkauer · 19 June 2008, 02:56

xLpt>en Googlec

Quote:

Originally Posted by Zetr0

me and my friend Jack Daniels are having a night in, hopefully trying to pickle this flu out....

heres futurlec's list of DAC's

Me and some blondes are taking a good time, too.

They are sisters. Surname "Bohemia"

Boot_WB · 20 June 2008, 00:04

Update: I just de-soldered a known working DAC from a working A1200 to test.

Plugged it into the faulty Scandy 1200 and.... IT WORKS!

A BIG thankyou to everyone who has contributed to this thread, especially Jaqube

without whose help I would have given up on repairing the Scandoubler a long time ago.

Both chips (DAC and MACH) are now socketed, and I've replaced all the original wiring between boards - albeit with the same crappy IDE-style ribbon cable as the original wiring. I'll think about replacing the Lisa PCB > VGA output cable with something a bit more shielded, as that is carrying the analogue signal so is susceptible to interference. The rest of it is all digital, so will probably just leave that as it is, although I might tidy it up a bit.

Hurray! The successful end of a longstanding repair job!

Now, more beer please... I'm on the O'Hanlon's Ruby Port Stout tonight

PS - Zetro, I'm planning to borrow a decent digital camera from work this week, so I'll post some pics up for you then.

Zetr0 · 20 June 2008, 00:27

Thats Awesome news....

and the fact your gonna post Hardware Pr0n, is better news

well done my friend!

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19 June 2008, 02:47	#22
Zetr0 Ya' like it Retr0? Join Date: Jul 2005 Location: United Kingdom Age: 49 Posts: 9,768	me and my friend Jack Daniels are having a night in, hopefully trying to pickle this flu out.... heres futurlec's list of DAC's

20 June 2008, 00:04	#24
Boot_WB Novice in the Black Arts Join Date: Nov 2004 Location: Kingston upon Hull Age: 47 Posts: 263	Update: I just de-soldered a known working DAC from a working A1200 to test. Plugged it into the faulty Scandy 1200 and.... IT WORKS! A BIG thankyou to everyone who has contributed to this thread, especially Jaqube without whose help I would have given up on repairing the Scandoubler a long time ago. Both chips (DAC and MACH) are now socketed, and I've replaced all the original wiring between boards - albeit with the same crappy IDE-style ribbon cable as the original wiring. I'll think about replacing the Lisa PCB > VGA output cable with something a bit more shielded, as that is carrying the analogue signal so is susceptible to interference. The rest of it is all digital, so will probably just leave that as it is, although I might tidy it up a bit. Hurray! The successful end of a longstanding repair job! Now, more beer please... I'm on the O'Hanlon's Ruby Port Stout tonight PS - Zetro, I'm planning to borrow a decent digital camera from work this week, so I'll post some pics up for you then.

20 June 2008, 00:27	#25
Zetr0 Ya' like it Retr0? Join Date: Jul 2005 Location: United Kingdom Age: 49 Posts: 9,768	Thats Awesome news.... and the fact your gonna post Hardware Pr0n, is better news well done my friend!

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