Picasso II distorted output

hese · 07 February 2010, 19:59

I have a Picasso II that gives a distorted picture on all screen modes.
The picture is heavily misaligned, curved on the edges and has some ghosting.
As if the picture would come with some invalid refresh rate.

The problem appears also with the passed through Amiga video signal.

Could the output connector be broken?
Visually there does not seem to be anything wrong the the board.

rkauer · 09 February 2010, 03:55

Are you sure the Picasso is the problem?

Did you tested the Amiga out without it connected?

hese · 09 February 2010, 10:22

There's something wrong with the Picasso.

The picture is flawless if I connect the monitor directly to Amiga video ouput using scandoubler.

rkauer · 09 February 2010, 19:17

So there is a problem on the analog part of the board.

Swap the three electrolytic capacitors. If no improvement, you need to locate a source for the delay lines (that square "things" next to the VGA out connector).

hese · 13 February 2010, 15:20

I replaced the capacitors but it didn't help.

How do I locate the source for the delay lines? I have rev 1.4 board.
By square things you mean the 5V Meisei relays?

By the way, the picture produced by the board is too big to fit on the screen.
It's vertically double the size it should be. If this helps..

hese · 16 February 2010, 19:43

Which components are the delay lines on rev 1.4 board?

rkauer · 17 February 2010, 03:29

Those funny square "relays" right on the back of the VGA connector.

hese · 17 February 2010, 08:46

Ok, but why quotes? These are 5V DPDT relays.

Does anyone have datasheets for these, couldn't find on the Internet?
Maybe these could be replace with some similar component.

07 February 2010, 19:59	#1
hese Registered User Join Date: Sep 2008 Location: Somewhere Posts: 223	Picasso II distorted output I have a Picasso II that gives a distorted picture on all screen modes. The picture is heavily misaligned, curved on the edges and has some ghosting. As if the picture would come with some invalid refresh rate. The problem appears also with the passed through Amiga video signal. Could the output connector be broken? Visually there does not seem to be anything wrong the the board.

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09 February 2010, 03:55	#2
rkauer I hate potatos and shirts Join Date: Oct 2007 Location: Sao Leopoldo / Brazil Age: 58 Posts: 3,482	Are you sure the Picasso is the problem? Did you tested the Amiga out without it connected?

09 February 2010, 10:22	#3
hese Registered User Join Date: Sep 2008 Location: Somewhere Posts: 223	There's something wrong with the Picasso. The picture is flawless if I connect the monitor directly to Amiga video ouput using scandoubler.

09 February 2010, 19:17	#4
rkauer I hate potatos and shirts Join Date: Oct 2007 Location: Sao Leopoldo / Brazil Age: 58 Posts: 3,482	So there is a problem on the analog part of the board. Swap the three electrolytic capacitors. If no improvement, you need to locate a source for the delay lines (that square "things" next to the VGA out connector).

13 February 2010, 15:20	#5
hese Registered User Join Date: Sep 2008 Location: Somewhere Posts: 223	I replaced the capacitors but it didn't help. How do I locate the source for the delay lines? I have rev 1.4 board. By square things you mean the 5V Meisei relays? By the way, the picture produced by the board is too big to fit on the screen. It's vertically double the size it should be. If this helps..

16 February 2010, 19:43	#6
hese Registered User Join Date: Sep 2008 Location: Somewhere Posts: 223	Which components are the delay lines on rev 1.4 board?

17 February 2010, 03:29	#7
rkauer I hate potatos and shirts Join Date: Oct 2007 Location: Sao Leopoldo / Brazil Age: 58 Posts: 3,482	Those funny square "relays" right on the back of the VGA connector.

17 February 2010, 08:46	#8
hese Registered User Join Date: Sep 2008 Location: Somewhere Posts: 223	Ok, but why quotes? These are 5V DPDT relays. Does anyone have datasheets for these, couldn't find on the Internet? Maybe these could be replace with some similar component.

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