Problem with a Sony Multiscan E500

[Starflex]

Thanks for posting that. It will be very useful. I built a cable
several years ago for the DOS version, but it was almost impossible to
use without the special test generators and color meter.

Windas does seem work also without signal generator (like ASTRO SG)...
It return an error during the work, but it work properly to write eeprom (I
don't had already used, I had only read this).

Is there a way to add older models to the database? It's the older
ones like the GDM-W900 and even GDM-20SE1 that could use the most
adjustment these days. Most are so far off that I don't even bother
with them any more.

I' m sure that in Windas there is GDW-FW900 in three version.
Moreover, in this LOOOOOOONG thread:

http://www.short-media.com/forum/showthread.php?t=19549

I had read that some people with the W900 monitor had solved its problem
with Windas.
If, of course, I had understand it correctly...
It's a very long post, but it is very interesting...

 

[Starflex]

Does anyone know why these monitors get brighter as they age? It
seems like a strange way for a CRT to age.

Well..some people says that this feature is probably searched by Sony, due
to compense the aging of the tube.
But sometimes the compensation (I think that, with the age, the tube lost a
part of his normal brightness) is too high, and so the monitor appear
"overbright".
For this reason, I think, the Sony Service don't solve the problem if you
gave to his service labs the monitor: they said that "The crt is ended, and
it need a new tube"...
If you read the long thread of the link, you can find persons that fix it
forcing the brightness to the valour of 130, 150, 110...some different
valour.
Every says that "the monitor is now perfect", but I think that is quite
strange that the same monitor is "perfect" with some, different, value of
the brightness.
Probably, they find the better solution due to the age of their monitor (and
also, of their tube)..according to the Sony's theory about "increasing
brightness due to life" (..if there is this theory...)
Also my 21" one was under Sony service, but they said that -the prevoius
owner- must spent over 400 Euros to solve the problem, replacing the tube...
Of course, he don't choose the reparation, and gave to me the monitor "as a
gift for experiments".
Probably, I think, if I fix the problem with Windas, after 12-18 months I'll
have a monitor that is really "ended"...
Obviously I want to fix it...but I'm not very very sure about a future, long
life of the tube...

Of course, IMVHO: I'm still waiting rs-ttl converter, and so I don't know
nothing, at this time, about my monitor.
I'm sure that Sony declare, for my monitor, a G2 tension of 512V, and I've
found 599 volts.....a little bit high...
(please consider that I'm italian,so please excuse my poor english)

 

[Andy Cuffe]

I' m sure that in Windas there is GDW-FW900 in three version.
Moreover, in this LOOOOOOONG thread:

http://www.short-media.com/forum/showthread.php?t=19549

I had read that some people with the W900 monitor had solved its problem
with Windas.
If, of course, I had understand it correctly...
It's a very long post, but it is very interesting...

The FW900 is a newer monitor with a flat screen. The W900 has a
curved screen and I assume it has a different chassis. I mentioned it
because I recently saw one for sale that looked good except for a blue
background with retrace lines.
Andy Cuffe

[email protected]

 

[Andy Cuffe]

My E500 was manufactured on December 2000.It was dismissed about in 2004 for
this problem (overbright) , and the old owner gave me it.
So I have picked up it about two months ago.
In the menu there isn' t this option, I'm sure.
Probably, Sony introduced this feature for further model to solve this
problem...that is very common, I see...

You'll have to fix it by adjustment then. 2000 is too early for this
feature.

Does anyone know why these monitors get brighter as they age? It
seems like a strange way for a CRT to age. I've also noticed that
these monitors get dimmer as they warm up. They are way over bright
just after initial warm up and settle down to normal brightness over
the first 10-20 min.
Andy Cuffe

[email protected]

 

[Starflex]

The FW900 is a newer monitor with a flat screen. The W900 has a
curved screen and I assume it has a different chassis. I mentioned it
because I recently saw one for sale that looked good except for a blue
background with retrace lines.

...uhmm..I don't know...but you can try to solve the problem using the
resistor solutions..
You must find the service manual, and find the voltage partitor in the RGB
AMP board...and try this solution. think that, if you have the BIG fortune
of living in America, you can find a lot of store that probably can sell to
you,for a very low price, a FW900 with the same problem, but that you can
fix (of course, probably...)using WINDAS.
In Italy is impossible to find those screen....also find a 21" for about 100
Euros (of course, with the brightness problem..) is a VERY BIG fortune...