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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: amiga4000freak on May 29, 2011, 02:58:43 PM
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hi
I have a amiga 4000 with a comp scandoubler which is fine when connected upto my 19" crt monitor but when its connected to a 19" lcd monitor it shows lines running down the screen why? Also whats the best way of connecting up speakers?.
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The old scandoublers are almost no good for LCD monitors, at some rare exceptions.
You need the Indivision AGA for A4000D and CD32.
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Same thing happens for me. On a CRT it shows great. On an LCD, you do get some lines showing. Its not bad at all, but it is noticeable
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Whats the best way of connecting speakers up toamiga 4000
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LCD monitors are much more susceptible to interference on the cabling, through mains plugs etc. Slowly moving horizontal stripes are usually due to grounding issues (exactly the same as with buzzing audio equipment). You can try eliminating / reducing them by
- connecting the devices to the same mains socket / extension lead
- connecting the (metal) cases with a somewhat substantial, additional grounding wire
- turning the mains plugs upside down (if possible): unplug everything but the two devices having the problem (no external CD drive, amp, ...) and try all four variations of plug orientation - there should be one combination with minimal interference
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Whats the best way of connecting speakers up toamiga 4000
Either directly to your Hi Fi unit/amp or buying a set of decent Speakers with a built in amp... :)
I prefer my own way though and that was building my own amp to sit inside my A1200's tower case with Volume, Bass, Treble and mixer controls on the front to mix between the Amiga's audio and the internal CD/DVD drives with speaker outputs on the back... :)
(http://www.amiga.org/forums/picture.php?albumid=102&pictureid=556)
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I have an Indivision A1200 and gives my some ghosting on my Samsung Synchmaster 941 MW. A few monts ago I bought a secondhand AverMedia TVBox W9 and I got a screen without ghosting and crisper.
This might be an alternative solution to connect older scandoublers to your LCD monitor or TV.
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I have an Indivision A1200 and gives my some ghosting on my Samsung Synchmaster 941 MW. A few monts ago I bought a secondhand AverMedia TVBox W9 and I got a screen without ghosting and crisper.
This might be an alternative solution to connect older scandoublers to your LCD monitor or TV.
Yeah i have both the Indivision 1200 and the Indivision 4000.
On the same LCD screen, with the same external switch and same type of cable, the display is far better on the 4000 than the 1200.
I think this is related to the ground connection missing on the 1200 version and present on the 4000 version.
I hope that this issue will be fixed on the expected Indi MK2, as i will certainly buy one for my other 1200.
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hi
There is one going on ebay for £30 is that ok to use
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I have an Indivision A1200 and gives my some ghosting on my Samsung Synchmaster 941 MW. A few monts ago I bought a secondhand AverMedia TVBox W9 and I got a screen without ghosting and crisper.
This might be an alternative solution to connect older scandoublers to your LCD monitor or TV.
What sort of cables are needed to connect the miggy to the TVBox W9?
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Franko
I have to tell you that is a really clean amiga system One of the cleanest towers i've seen. nice.
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Hi,
@Amiga4000Freak,
I have a Picasso II in my A4000, and a GVP IV 24 card, the GVP IV 24 card feeds into the Picasso II card, and the Picasso II feeds my monitor. It works perfectly on any monitor I put on it. Now I use my audio outputs on my A4000 to feed to JBL pro self powered computer speakers, if you can find them they seem to do excellent, sometimes when I really want to rock my computer room, I hook them up to my Koss M100/plus self powered speakers, just replaced the speakers in these with some pioneer speakers, these things will shake the room and the sound off the A4000 is awesome. Back in the old days, I used to use my Sony 250 watt per channel amp, with some Sony monitor speakers to really rock the town (and I mean rock the town, the Sony speakers have a warning on them that at 1 watt of power the speaker will put out 110 db of sound).
Anyhow I just use the A4000 stereo output connectors in the back by the 23 pin video output plug.
smerf
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Franko
I have to tell you that is a really clean amiga system One of the cleanest towers i've seen. nice.
Hi,
@magnetic,
OH GOD,
I think I am having a heart attack, you gave Franko a compliment.
Lucy, Lucy, I think I am having the big one.
smerf
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Hi,
@Amiga4000Freak,
Are you VGA plugs properly grounded?
Are your power plugs connected in a grounded side plug, if you are using an old extension cord, you have the option of plugging in the monitor plugs any way that you want, make sure all your plugs are polarized.
If in the USA.
smerf
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I used a CompServ Arxxon scandoubler successfully with various TFT monitors.
Check out your monitor controls, modify the clock and sync and you'll get rid of the vertical lines.
PS: If your monitor doesn't show anything put your A4000 jumper in NTSC mode and it will work
edit: um! of course, if you have interference in the screen you should check your miggy shielding and also use a proper vga cable (although most monitor cables included by the manofacturer are usually OK)
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hi
I have a amiga 4000 with a comp scandoubler which is fine when connected upto my 19" crt monitor but when its connected to a 19" lcd monitor it shows lines running down the screen why? Also whats the best way of connecting up speakers?.
Are you running in PAL or NTSC-mode? When in PAL, your scandoubler might output 50hz and this refresh rate is commonly not accepted via the VGA port. NTSC (60hz) should however work fine.
Some LCD might accept 50hz although it is out of the specs and might show the symptoms you describe.
Either get a new scandoubler or get a converter that transcodes the VGA signal to HDMI or Component.
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Franko
I have to tell you that is a really clean amiga system One of the cleanest towers i've seen. nice.
Kudos to u magnetic.
It is certainly neat, functional, and enviable. :)
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Franko
I have to tell you that is a really clean amiga system One of the cleanest towers i've seen. nice.
Kudos to u magnetic.
It is certainly neat, functional, and enviable. :)
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How well does http://cgi.ebay.com/15Khz-RGB-CGA-Component-Video-VGA-Converter-Scaler-/120457605985?pt=LH_DefaultDomain_0&hash=item1c0bd53361 work with an A1200?
I need an external as the Indivision can't be used while FASTATA is installed.
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How well does http://cgi.ebay.com/15Khz-RGB-CGA-Component-Video-VGA-Converter-Scaler-/120457605985?pt=LH_DefaultDomain_0&hash=item1c0bd53361 work with an A1200?
I need an external as the Indivision can't be used while FASTATA is installed.
You'll have to hope first that someone has actually bought one of these and tried it on an A1200 first as it's not an Amiga Specific bit of kit... :(
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Franko
I have to tell you that is a really clean amiga system One of the cleanest towers i've seen. nice.
Don't mean to sound rude... but what's the catch... ;)