Re: shaky Star field in Star wars

From: Gregg Woodcock <woodcock_at_sisna.com>
Date: Wed Aug 14 2002 - 17:47:56 EDT

----- Original Message -----
From: "oll" <oll@lineone.net>
To: <vectorlist@synthcom.com>
Sent: Wednesday, August 14, 2002 6:42 PM
Subject: Re: VECTOR: shaky Star field in Star wars

> Hi,
>
> No its defo the boardset.

Most alignment problems are due to bad, or rather missing (as in 1 leg
has broken away from the PCB) capacitors. Many caps on these
boards stick up too much and are easy to bend over breaking a leg or
two. AVG C4 on SW/ESB is particularly susceptible to this. A tell-tale
sign of a bad C4 is going to the checkerboard screen in the test mode.
Further symptoms include:

A. Crosshatch will not align.

B. Scale test - Linear: the box contracts smoothly but it starts
opening at the top right side about half way down. The box also drifts
to the right on its compression. Linear/Binary test shows no such
distortion (that would eliminate the monitor as a cause).

C. Raster test is not a filled box but more like a parallelogram
extending outside the box at the lower left while the outer frame
remains a square box.

D. Color bar test shows all the bars skewed from one another in a
diagonal shift. The bars are straight, but they are not on top of each
other as the should be.

E. "Checkerboard" test looks perfect EXCEPT the center column is about
twice as wide as it should be (twice as wide as the others) almost as
though there is a vertical line missing.

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Received on Wed Aug 14 15:03:42 2002

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