A4000 video sync?

07 October 2008, 23:28

Hi,

I recently bought an A4000/040 including a Magni 4000 genlock card. Now I seem to have a problem with the video port: it looks like 1 or more sync signals are missing. my Microvitec 1438 monitor currently only works well when I switch the genlock card off.

So I tried to remove the genlock card and connected my bare A4000 to the monitor via the video port, but: again an unsync'ed picture... How is this possible? Could it be that I have to set a jumper on the motherboard to get the sync signal(s) back on the video port? I looked in the A4000 HW guide and I think all the jumpers on my mainboard are in standard configuration.

Any idea's?
Thanx in advance, T-o.

rkauer · 08 October 2008, 01:24

Look at aminet: there is a hack who is in fact the very same as sync strainer, who is all you need to fix the problem.

19 November 2008, 21:24

Finally got the time to build this sync buffer circuit yesterday, and it works! I just wonder why I didn't need a buffered cable for my A1200. Is the video circuit that different from a A4000?

rkauer · 19 November 2008, 22:17

Nope. Only in A1200 you have the RGB-tv modulator circuit as a "bonus".

07 October 2008, 23:28	#1
T-o Posts: n/a	A4000 video sync? Hi, I recently bought an A4000/040 including a Magni 4000 genlock card. Now I seem to have a problem with the video port: it looks like 1 or more sync signals are missing. my Microvitec 1438 monitor currently only works well when I switch the genlock card off. So I tried to remove the genlock card and connected my bare A4000 to the monitor via the video port, but: again an unsync'ed picture... How is this possible? Could it be that I have to set a jumper on the motherboard to get the sync signal(s) back on the video port? I looked in the A4000 HW guide and I think all the jumpers on my mainboard are in standard configuration. Any idea's? Thanx in advance, T-o.

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08 October 2008, 01:24	#2
rkauer I hate potatos and shirts Join Date: Oct 2007 Location: Sao Leopoldo / Brazil Age: 58 Posts: 3,482	Look at aminet: there is a hack who is in fact the very same as sync strainer, who is all you need to fix the problem.

19 November 2008, 21:24	#3
T-o Posts: n/a	Finally got the time to build this sync buffer circuit yesterday, and it works! I just wonder why I didn't need a buffered cable for my A1200. Is the video circuit that different from a A4000?

19 November 2008, 22:17	#4
rkauer I hate potatos and shirts Join Date: Oct 2007 Location: Sao Leopoldo / Brazil Age: 58 Posts: 3,482	Nope. Only in A1200 you have the RGB-tv modulator circuit as a "bonus".

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