Dragon's Lair Fans - Arcade Lifestyle

General Chat => Technical Area => Topic started by: Blanbek on February 01, 2015, 04:36:06 PM

Title: color problem scramble
Post by: Blanbek on February 01, 2015, 04:36:06 PM

Hello,

I started a new project and am having a color problem on the bottom left of the screen ?

the screen is a Sony Trinitron....

someone has an idea or has encountered the same problem?

Thanks!! Berny

Title: Re: color problem scramble
Post by: level42 on February 01, 2015, 06:01:18 PM

Yup.....you cant use a Trinitron on its side.

Title: Re: color problem scramble
Post by: level42 on February 01, 2015, 06:54:42 PM

https://books.google.nl/books?id=dswWzEZuMRQC&pg=PA194&lpg=PA194&dq=using+trinitron+on+its+side&source=bl&ots=g4NOWfogFB&sig=6t6UDVC00HnUuo5CGehvzZtBpSA&hl=nl&sa=X&ei=IlzOVPr2M4fMPcOtgOAI&ved=0CEYQ6AEwCA#v=onepage&q=using%20trinitron%20on%20its%20side&f=false

Title: Re: color problem scramble
Post by: Etienne MacGyver on February 01, 2015, 07:19:25 PM

Looks like a decaussing issue.

interesting, i never knew the "trinitron on its side thing"

Guess we learn something every day  :D

Title: Re: color problem scramble
Post by: Blanbek on February 01, 2015, 07:30:05 PM

Thank you for the information André.
So I will try with one another tv screen...

Title: Re: color problem scramble
Post by: level42 on February 01, 2015, 08:07:30 PM

Still can use it in horizontaal mode :)

It's the Aperture grill causing this.....its a bit like a curtain and because it moves when you tilt it you will get this result....

You could still try a degauss of course, it's worth it but I don't think that is the problem this time.

You can still use the Trinitron in horizontal mode of course....

Title: Re: color problem scramble
Post by: DarthNuno on February 01, 2015, 09:04:44 PM

Well, I'm using a Trinitron inside my galaxian cabinet, but the screen is more in a flat position than vertical, that certainly explains why I don't have this issue...interesting and good to know anyway  ;)

Title: Re: color problem scramble
Post by: Blanbek on February 06, 2015, 05:59:38 PM

Hi André,

I confirm with a Sanyo tv it works correctly...

one more question :)

there is a Sanyo service menu to adjust the picture? or does it make the setting on the tv pcb?

Thanks, Berny

Title: Re: color problem scramble
Post by: Wurstkopp on February 07, 2015, 07:08:17 PM

You'll hardly find anyone knowing the inside of a certain tv as there are thousand different models out there. A quick google search will give you the answer in a sec.
If there's no service menu then take a look on the chassis. Most tvs will have a least a few pots to adjust the picture but only a small number will have all the settings known from arcade monitors. Most tvs will have h-width coils like the older arcade monitors.

Title: Re: color problem scramble
Post by: level42 on March 07, 2015, 09:09:19 PM

Judging by the case of that TV i'm pretty sure it will have an electronic (menu-driven) set-up.

Indeed google is your best (only ?) friend here...

Title: Re: color problem scramble
Post by: level42 on March 07, 2015, 09:12:24 PM

Found this....

SANYO
1.
* Unplug the power cable.
* Press and hold the {MUTE} button on the remote control while plugging the power cable back into the outlet.
* Keep pressing the {MUTE} button until the TV powers on with the Service Menu displayed.
* Use the {CH+} {CH-} buttons to select menus.
* Use the {VOL+} {VOL -} buttons to change settings.
* Some menus might have sub-addresses. Use the numeric buttons {0} to {7} to adjust sub-item data.
* Press the {MENU} button or turn the TV off to exit.

2.
* Unplug the power cable.
* Press and hold the {VOL -} button on the TV
while plugging the power cable back into the outlet.

* Keep pressing the {VOL -} button until
the TV powers on with the Service Menu displayed.

* Use the {CH+} {CH-} buttons to select menus.
* Use the {VOL+} {VOL -} buttons to change settings.

* Some menus might have sub-addresses. Use the
numeric buttons {0} to {7} to adjust sub-item data.

* Press the {MENU} button or turn the TV off to exit.

Title: Re: color problem scramble
Post by: Blanbek on March 07, 2015, 09:26:28 PM

Hello André,

I found your first sequence for the set-up menu but not work ? so I made a small adjustment with the potentiometers on the  pcb... But not perfect...
I will try with your sequence 2

Thanks!

Title: Re: color problem scramble
Post by: level42 on March 07, 2015, 11:34:53 PM

No idea If it works for this model, it might be for US TVs....