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From: davids@cup.portal.com (David Kenneth Schreiber)
Newsgroups: comp.sys.amiga.hardware
Subject: Re: Minor display enhancer problem
Message-ID: <32853@cup.portal.com>
Date: 16 Aug 90 00:15:22 GMT
References: <32765@cup.portal.com> <13802@cbmvax.commodore.com>
Distribution: usa
Organization: The Portal System (TM)
Lines: 45

In article <13802@cbmvax.commodore.com> hood@cbmvax.commodore.com (Scott Hood)
 writes:
.In article <32765@cup.portal.com> davids@cup.portal.com (David Kenneth Schrei
b
er) writes:
.>Well, I've gotten the overheating and RAM problems solved, but there's one
.>more minor problem that I'm having:  sometimes, when doing a cold boot the
.>deinterlaced image has garbage overlayed over it and has a general purplish
.>tint.  Shutting off the computer and turning back on about a second later
.>gets rid of it every time.  Turning it on any time after ~1 minutes results
.>in the screen garbage, but again it is cleared using the above technique.
.>Any time that the display-enhancer is not used (the productivity modes, or
.>when it is switched off), the display is garbageless.  It is also free of
.>any problems when the display is simply scan-doubled (eg. a 640x200 screen);
.>dragging that non-interlaced screen down to reveal an interlaced screen does
.>bring up the garbage.  It happens under both 1.3 and 2.0.  I've also check
.>the cable half a dozen times;  I'm sure it's not that (this problem never
.>showed up on the 3000 I had replaced).

[...]

.>Thanks in advance for your advice & suggestions.
.>
.>-Dave Schreiber at davids@cup.portal.com    "Coffee, Darling?"

.Dave,

.Have you tried adjusting the fine-tuning control as outlined in the
."Introducing the A3000" manual?  I would bet that if you follow the
.instructions carefully that this will solve your problem.
.C
.problem.  Please follow the instructions carefully

.Scott Hood, Hardware Design Engineer (A3000 Crew),  Commodore-Amiga, Inc.
.   {uunet|pyramid|rutgers}!cbmvax!hood   hood@cbmvax.cbm.commodore.com
.  "The views expressed here are not necessarily those of my employer!" 

Yes, I have tried that and it had _no_ effect on the problem (although
it did clear up some pixel-jittering).  The problem I'm having is not at
all like what is described in the manual (i.e. there are no stability
problems):  imagine taking a standard screen image, subtracting out the
green (like the signal for green isn't connected), and genlocking garbage
over that with SuperGen set at 1/2 transparent.  Any ideas?

-Dave Schreiber at davids@cup.portal.com            "Coffee, Darling?"