amiga.org
     
iconAll times are GMT -6. The time now is 02:23 PM. | Welcome to Forum, please register to access all of our features.

» Amiga.org » Amiga computer related discussion » Amiga Hardware Issues and discussion » Picasso IV brightness setting??

Amiga Hardware Issues and discussion This forum is dedicated to the discussion and resolution of issues related to Classic and Next Generation Amiga hardware. Got a problem with a piece of hardware? Click to speak.

Reply
 
Thread Tools Display Modes
Old 01-02-2010, 05:05 AM   #1
dougal
Defender of the Faith
Points: 16,011, Level: 81 Points: 16,011, Level: 81 Points: 16,011, Level: 81
Activity: 1% Activity: 1% Activity: 1%
 
dougal's Avatar
 
Join Date: Oct 2005
Location: Malta
Posts: 1,207
Default Picasso IV brightness setting??

I find that my CRT SVGA monitor is too dim when connected to my Picasso IV. It is on full brightness but that is not very bright at all.

Is there some sort of setting for the picasso or something to make it brighter?

I am sure there is nothing wrong with the monitor.
__________________
A1200HD- Blizzard 1230IV / 64Mb / Kick 3.1 / OS 3.9 / 20GB HD / Indivision
A2000 Rev4.4 - Stock (But with ECS chipset) / 1MB Chip mode
CD32 - Stock (W/ 2 CD32 Controllers]
A500 Plus - 68000 @ 7Mhz / 2MB Chipmem / 2Mb Fast ram / 2.04/Kick1.3 / A590
A600HD - 2MB Chip / 8MB Fast / 2GB CF HD / Kick 3.1
Various Spare A500's and A500 Plus's

PowerMac G4 1Ghz (MorphOS / Leopard)

http://amigamap.com/user/172
dougal is offline   Reply With Quote
Old 01-02-2010, 05:21 AM   #2
MastaTabs
Too much caffeine
Points: 5,647, Level: 48 Points: 5,647, Level: 48 Points: 5,647, Level: 48
Activity: 1% Activity: 1% Activity: 1%
 
MastaTabs's Avatar
 
Join Date: Dec 2005
Posts: 75
Default Re: Picasso IV brightness setting??

Nope, there isn't.
__________________
VT drivers: http://www.sophisticated-development.de/
MastaTabs is offline   Reply With Quote
Old 01-02-2010, 06:43 AM   #3
LoadWB
Kindred of Babble-on
Points: 13,379, Level: 75 Points: 13,379, Level: 75 Points: 13,379, Level: 75
Activity: 42% Activity: 42% Activity: 42%
 
LoadWB's Avatar
 
Join Date: Jul 2006
Location: Tallahassee, FL
Posts: 2,128
Default Re: Picasso IV brightness setting??

FWIW, I ran into that problem before. It was because the output of the PIV was out-of-range of the capabilities of the monitor. Now, whether it was the refresh rate/resolution or the position of the screen in the output, I do not recall.

Does the screen output center perectly on your CRT? Have you tried the lowest resolution setting and/or fiddled with the output settings? I use P96, so I use the P96 prefs program. If you do fiddle, make notes.
LoadWB is offline   Reply With Quote
Old 01-02-2010, 07:12 AM   #4
zipper
Kindred of Babble-on
Points: 12,688, Level: 73 Points: 12,688, Level: 73 Points: 12,688, Level: 73
Activity: 18% Activity: 18% Activity: 18%
 
zipper's Avatar
 
Join Date: Feb 2002
Location: finland
Posts: 2,144
Default Re: Picasso IV brightness setting??

On small screens, 320x240, 640x480 doublescan modes are brighter than normal ones AFAIR. Depends on the monitor how high you can do doublescan.
zipper is online now   Reply With Quote
Old 01-04-2010, 05:14 AM   #5
dougal
Defender of the Faith
Points: 16,011, Level: 81 Points: 16,011, Level: 81 Points: 16,011, Level: 81
Activity: 1% Activity: 1% Activity: 1%
 
dougal's Avatar
 
Join Date: Oct 2005
Location: Malta
Posts: 1,207
Default Re: Picasso IV brightness setting??

In OS3.9 i keep the 800x600 24bit setting (16m colors). Its not THAT bright to say the least but its acceptable.

The problem is games (Native Amiga Graphics) which seem dim.
__________________
A1200HD- Blizzard 1230IV / 64Mb / Kick 3.1 / OS 3.9 / 20GB HD / Indivision
A2000 Rev4.4 - Stock (But with ECS chipset) / 1MB Chip mode
CD32 - Stock (W/ 2 CD32 Controllers]
A500 Plus - 68000 @ 7Mhz / 2MB Chipmem / 2Mb Fast ram / 2.04/Kick1.3 / A590
A600HD - 2MB Chip / 8MB Fast / 2GB CF HD / Kick 3.1
Various Spare A500's and A500 Plus's

PowerMac G4 1Ghz (MorphOS / Leopard)

http://amigamap.com/user/172
dougal is offline   Reply With Quote
Old 01-04-2010, 09:44 AM   #6
dougal
Defender of the Faith
Points: 16,011, Level: 81 Points: 16,011, Level: 81 Points: 16,011, Level: 81
Activity: 1% Activity: 1% Activity: 1%
 
dougal's Avatar
 
Join Date: Oct 2005
Location: Malta
Posts: 1,207
Default Re: Picasso IV brightness setting??

I would really like to solve this problem....

I am stuck here.. could it be both monitors are too "dim" for the picasso iv ?

I am using a standard PC CRT monitor which i found at work
__________________
A1200HD- Blizzard 1230IV / 64Mb / Kick 3.1 / OS 3.9 / 20GB HD / Indivision
A2000 Rev4.4 - Stock (But with ECS chipset) / 1MB Chip mode
CD32 - Stock (W/ 2 CD32 Controllers]
A500 Plus - 68000 @ 7Mhz / 2MB Chipmem / 2Mb Fast ram / 2.04/Kick1.3 / A590
A600HD - 2MB Chip / 8MB Fast / 2GB CF HD / Kick 3.1
Various Spare A500's and A500 Plus's

PowerMac G4 1Ghz (MorphOS / Leopard)

http://amigamap.com/user/172

Last edited by dougal; 01-04-2010 at 11:25 AM..
dougal is offline   Reply With Quote
Old 01-04-2010, 11:31 AM   #7
MastaTabs
Too much caffeine
Points: 5,647, Level: 48 Points: 5,647, Level: 48 Points: 5,647, Level: 48
Activity: 1% Activity: 1% Activity: 1%
 
MastaTabs's Avatar
 
Join Date: Dec 2005
Posts: 75
Default Re: Picasso IV brightness setting??

the only thing I could think of is that you have set the PIV to Sync on Green with the sog jumper. Then the green signal is bumped to about 1V instead of about 0.7V. Maybe your screens don't like that.
__________________
VT drivers: http://www.sophisticated-development.de/
MastaTabs is offline   Reply With Quote
Old 01-04-2010, 08:54 PM   #8
Severin
Merely Curious
Points: 1,521, Level: 22 Points: 1,521, Level: 22 Points: 1,521, Level: 22
Activity: 1% Activity: 1% Activity: 1%
 
Join Date: Jan 2010
Location: At home
Posts: 1
Default Re: Picasso IV brightness setting??

Quote:
Originally Posted by dougal View Post
I would really like to solve this problem....

I am stuck here.. could it be both monitors are too "dim" for the picasso iv ?

I am using a standard PC CRT monitor which i found at work
Another problem could be with the CRT's themselves, if they're getting on a bit the Lineoutput Transformer could need tweaking. This is not a job for a beginner though as there are very serious voltages in that transformer.

If you want to attempt it though, take the back off the monitor and you will see a large black bok with a thick wire connected to the tube. On the side of that are 2 controls, one adjusts the focus, the other the brightness. find a long piece of wood (a chop stick trimmed to a flat end like a screwdriver works well) and turn the brightness knob clockwise a little then do the same for the focus as it will be effected by the brightness.

WARNING: touch the wrong thing and you will go flying across the room. only do this if you know what you're doing.

A far safer option is to buy a cheapish 15" tft monitor/tv that has both vga, composite and rf inputs which let you plug several machines into it without having to swap cables all the time.
Severin is offline   Reply With Quote
Old 01-04-2010, 09:58 PM   #9
coldfish
Cult Member
Points: 7,096, Level: 55 Points: 7,096, Level: 55 Points: 7,096, Level: 55
Activity: 22% Activity: 22% Activity: 22%
 
Join Date: Nov 2003
Posts: 731
Default Re: Picasso IV brightness setting??

Id test the display on a PC, is it still dim?

Then Id test as many other monitors as I could on the card...

I vaguely remember reading something years ago about the Amiga RGB signal being too low for some PC monitors, I dunno if this applies to picasso - iirc people talked about adding a video signal amplifier.

MastaTabs post about sync on green rings a bell too, def worth a try.

Good luck!
coldfish is offline   Reply With Quote
Old 01-04-2010, 11:19 PM   #10
Damion
Desperately needs a life
Points: 15,144, Level: 79 Points: 15,144, Level: 79 Points: 15,144, Level: 79
Activity: 11% Activity: 11% Activity: 11%
 
Join Date: May 2002
Location: Nevada, USA
Posts: 3,450
Default Re: Picasso IV brightness setting??

Quote:
Originally Posted by dougal View Post
I would really like to solve this problem....

I am stuck here.. could it be both monitors are too "dim" for the picasso iv ?

I am using a standard PC CRT monitor which i found at work
I agree with Severin - CRTs gradually lose brightness with age, and can appear very dull, especially since you're probably used to looking at LCDs. (Even new, high quality CRTs can look a bit dim in comparison.) Adjusting the LOPT can help, you might want to tweak the focus adjustment(s) as well (usual caveats apply!).

Hopefully that's all it is... the PIV output itself isn't unusually dim compared to other similar cards.
Damion is offline   Reply With Quote
Old 01-05-2010, 12:02 AM   #11
LoadWB
Kindred of Babble-on
Points: 13,379, Level: 75 Points: 13,379, Level: 75 Points: 13,379, Level: 75
Activity: 42% Activity: 42% Activity: 42%
 
LoadWB's Avatar
 
Join Date: Jul 2006
Location: Tallahassee, FL
Posts: 2,128
Default Re: Picasso IV brightness setting??

So your native PIV modes are usably bright, and the native Amiga modes are dim. It does sound like a problem with the monitor. Where did the second monitor you mention come into play?

I will parrot what others have said: test the monitor on a known-good PC. Also test your Amiga video output on an Amiga monitor if you have one available.
LoadWB is offline   Reply With Quote
Old 01-05-2010, 12:24 AM   #12
dougal
Defender of the Faith
Points: 16,011, Level: 81 Points: 16,011, Level: 81 Points: 16,011, Level: 81
Activity: 1% Activity: 1% Activity: 1%
 
dougal's Avatar
 
Join Date: Oct 2005
Location: Malta
Posts: 1,207
Default Re: Picasso IV brightness setting??

Quote:
Originally Posted by LoadWB View Post
So your native PIV modes are usably bright, and the native Amiga modes are dim. It does sound like a problem with the monitor. Where did the second monitor you mention come into play?

I will parrot what others have said: test the monitor on a known-good PC. Also test your Amiga video output on an Amiga monitor if you have one available.
I had been using the Amiga until recenty on a Commodore 1084S and the RGB output was good, bright and normal.

These 2 VGA monitors i have tried, well the 1st one was dumped in my basement for about 4 years and the second one has been abandoned/dumped at work for about 2 years.

I will try connecting a PC as you said to the CRT.

I did try connecting the PIV to my current 22" LCD Widescreen and without enough testing the display looked good and bright. But that monitor stays with my PC + only a CRT truely looks good on an Amiga :P
__________________
A1200HD- Blizzard 1230IV / 64Mb / Kick 3.1 / OS 3.9 / 20GB HD / Indivision
A2000 Rev4.4 - Stock (But with ECS chipset) / 1MB Chip mode
CD32 - Stock (W/ 2 CD32 Controllers]
A500 Plus - 68000 @ 7Mhz / 2MB Chipmem / 2Mb Fast ram / 2.04/Kick1.3 / A590
A600HD - 2MB Chip / 8MB Fast / 2GB CF HD / Kick 3.1
Various Spare A500's and A500 Plus's

PowerMac G4 1Ghz (MorphOS / Leopard)

http://amigamap.com/user/172
dougal is offline   Reply With Quote
Reply

Bookmarks

Tags
brightness , picasso , setting

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump