Re: Color temperature problem with Dell P1110

From: George Jetson (George.Rkindig_at_neo.rr.com.Jetson)
Date: 12/22/04 

Date: Wed, 22 Dec 2004 05:21:12 GMT

"Michael D. Cencula" <junk4@cencula.com> wrote in message
news:ph5yd.7413$vb7.6775@fe1.columbus.rr.com...
> Hello,
>
> I've got a Dell P1110 that came to me with multiple problems. It had the
> well-known excessive brightness problem which I cured using the hack of
> bridging an additional resistor across one of the two 10M resistors that
> lead to G2. It also had a slow warmup...around 60 seconds before a
> picture
> would appear. This was cured by replacing C685 on the power supply board
> which was high ESR.
>
> The last problem I haven't been able to figure out yet. I belive this
> problem started when I used the "color return" function available from the
> user controls, but I can't remember for sure. Basically, the front panel
> brightness controls have little or no effect on brightness, but they do
> affect the color temperature. A low brightness setting gives the screen a
> blueish tint, while a high brightness setting gives the screen a reddish
> tint. The contrast control seems to work fine from what I can tell.
>
> If anyone has any ideas of what may be wrong, I'd be interested in hearing
> them. Either that or can I "undo" the color return function? i.e. Is
> there some "reset" I can access through a hidden menu or something?
>
> Thanks,
> Mike Cencula

----------------------------------
Paste unknown old post here

> I have repaired over 500 Dell P1110
> Most of the problems I have seen are for Excessively bright picture.
> R459 is the best to Mod and Have found that 5.6M ohms to 7.5M ohms to be
> the repair range depending on how bright the picture has become. The lower
> the Value of R459 the darker the picture will become. I have noticed that
> when a lower value is needed often the bightness adjustment will also
> shift the picture color. Darker settings will shift to blue and brighter
> settings will shift to red. I have not found a way to compensate or repair
> this problem. I have a number of P1110 that have convergence problems
> where the center of the picture is good but the sides and top/bottom are
> off, front panel controls have no effect on edges of screen, and
> convergence rings and yoke adjustment cannot restore good picture. This is
> a problem with the video board on the bottom of chassis, I have swapped
> this out and restored convergence. It's not always perfect as DAS
> adjustment is need to align monitor.
> DAS
> I have located many different versions of the Sony DAS. some for DOS and
> some for windows 9x, all require dongle (HASP). I have also located many
> HASP emulator progams. I have yet to get them to work without the Hasp. I
> did find one DOS version Of the DAS that has been BIN hacked to ignore the
> Hasp search. I was able to read the information from the EEPROM with the
> hacked version, But the version did not have the Data to reprogam the
> EEPROM in the Dell P1110. So I am working on hacking the Dell DAS version
> DAS 4.9.1. *** wish me luck ! *****
>
> I addition to needing the DAS software and the HASP or a work around you
> will need to get 3 peices from SONY that create an interface between a
> desktop PC and the monitor you are adjusting. This "JIG" rig (3 pieces)
> cost about $250 plus shipping.
>
> I don't understand why this Crap is such a hassle to get unless Sony
> doesn't want you to to be able repair your own Monitor, even if you are
> technically capable !

I found this post a few weeks ago and using a 14M resistor paralled, managed
an acceptable repair. Some intermittent color issues were observed but the
user "cleared" them. I do not know who posted this or where, I googled got
lucky and copied it for my own use. Maybe the original poster will
recognize his work and follow up. 

-- 
They can have my command prompt when they pry it from my cold dead fingers.

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