Ok, I just ran WinDAS and re-loaded my backup Data file. The monitor, which is a P992, returned to nominal appearance. The OSD unlocked as soon as I clicked OK on the load screen. I then exited WinDAS and verified the OSD was still unlocked. I then powered down the monitor and removed the interface cable. When I powered back up again, the OSD was locked again!! I repeated these steps a couple of times, even loading a backup of my original dat file prior to making changes. Same result.
Of course, my problem may be unrelated to WinDAS. At least WinDAS enables me to temporarily unlock the OSD to make adjustments, if needed. I can live with that.
But if you have any suggestions, I'm all ears.
I was wondering if someone can help me out. I have a Sony 24" W900 (different from the one posted by someone else here). It has the brightness problem and I can clearly see the retrace scan lines. There is one really noticeable white one going right across the screen.
This monitor doesn't have the 4pin connector in the back. There is a service input that looks similar to an S-Video input.
I'm trying to find the R459 to solder the resistor but I can't find it. I've uploaded some pics of the back. Please help me find where to solder the resistor.
Edit: I've attached a pic of what plugs are in the back. Most of the Dells and Sonys here have that 4pin outlet. Mine has the S-video looking plug
I think you can find the ECS port in the bottom right of the second picture you posted (http://www.short-media.com/forum/attachment.php?attachmentid=18844&d=1137397071). Earlier in the thread someone posted a picture of their sony monitor with a similar looking tab on top of the pins. Try and see if you can remove it.
I think I MAY have found the resistor. Correct me if I'm wrong please! I don't have a schematic of the board. I'm just relying on the past comments on this thread. It looks like the faulty resistor is R1823 on mine(attached pic). But I don't know what type of resistor it is. It's some kind of blue bean shaped resistor?? (pic attached). Please help!!
Thanks for your help, but this is the fourth time I've taken the cover off and I don't see any tabs that I could remove.
As a follow up on my repairs, I would say that I resurected 1 P97 IBM and 1 21" IBM. But I still have those P97 with both "too bright problem" (that I can fix with WinDAS but I did not find (as P991 DELL SONY stated) any sync. settings in WinDAS to fix the synchro problem. Is it possible that the excessive voltage on G2 had ****ed some capacitors or something like that ?
Can anybody tell me where I could find a good book on repairing monitors and TV ? (online or paper or PDF)
Thank you again !
Hello to all, I am a french student so please excuse me for my bad english. (it’s the first time I post here).
A few months ago I get a Sony CPD E500E 21'' monitor from a friend and it had the over brightness problem. After reading about the DAS solution on this forum I build a TTL <-> RS232 cable and used an old DOS version of DAS. This version of DAS gave some error message each time I tried to save the EPROM into a file (errors in reading the data). The problem is that I still performed the 'white balance procedur' without knowing anything of the values asked to set. So I adjusted the G2 but get a monitor showing incorrect colours and becoming slightly darker when displaying a white screen.
Yesterday I found the howto from P991 DELL SONY (many thanks to him for this great work) and I get to install winDAS and to save my (now bad) EPROM into a file. I tried a second time the white balance with winDAS and the monitor now looks better but still have this problem of becoming darker when showing something white and colours could be better.
I want to use this monitor for graphics and video editing and so I want to adjust the white balance exactly. I can get a colorimeter from a friend but I don’t know how to use it with winDAS and what I should do with all this setting winDAS is asking for during the white balance procedure.
Perhaps someone (P991 DELL SONY, you said you had performed it for your monitor) can explain to me each step of the 'white balance procedure' from winDAS, how I should set the parameters and what I should measure with the colorimeter. That would be a great help for me.
Many many thanks in advance for your help.
P991 DELL SONY wrote:
If you're ready for a complete education, I'd try the navy's NEETS modules. They cover CRTs and other vacume tubes, how caps,resistors,diodes etc. work. After reading it all, you should be more qualified than a repair guy. I've only read the part on CRTs in general.
Do you have the service manual for those monitors? That could probably make finding the right things easier.
I doubt the G2 can cause a problem, the more resistance, the brighter your screen gets, so it's actually got less voltage on it when it's brighter. Atleast, for that resistor people keep changing. I haven't actually studied the G2 circuit that much. It does seem to be connected to the FBT somehow, in adition to be connected to an IC which is probably controlled by DAS.
If you find any specific monitor/tv/CRT repair stuff, let us know.
Hi... Many many thanks for everyone's help on the color settings. I picked up the cable from the hobby place, fixed the pinout, and got Windas to lower the G2 voltage on my Sony CPD-E400. The retrace lines are gone and I have a color black again!
Two questions though... First, I have 2 Sony CPD-E400's.. one was washed out, the other wasn't. Ideally, the color would match on the two... It's not as easy as loading the data file from the good one onto the bad one by any chance, is it?
Also, I'm still having some color issues that I'm trying to work out. The color is excessively blue, not red enough. The Sony Color Test app shows red as having a purplish tone to it. I lowered B_DRV, raised R_DRV... same with the R_CO_MIN and R_CO_MAX and B_CO_MIN and B_CO_MAX... It's still really blue. Whites & grays come out blue, etc. Any idea what settings I should be playing with?
hey guys.... i have a Sony E400 with the classic "too bright" problem. I got myself a cable and configured WINDAS as instructed... yet when i when i run WINDAS the error message "No mdl Files" comes up. Also when clicking "model sel" no screen comes up. any ideas?
My 21" inch trinitron has 2 lines across. This is what makes it a "Trinitron".
The no mdl files is normal...I had same prob with the model select not finding anything till I switched to a diff pc, for some reason my main box wouldn't recognize the monitor/com port.
rule out what you can, what ever is left is the prob
by "normal" did you mean "common"?? so simply using another computer is the only solution for this "no mdl files" problem??
everytime I start windas I see the "no mdl" files.....the program works