your g2is too high.To do this properly you need software from sony and an serial interface to do a white balance. you need to be sony authorized to obtain this.However,you can put a 3 meg resistor fron ground to g2.If its still too bright try a 2 meg R.I have repaired a few 100 in this fashion.Let me know how this turns out.Perhaps you can tell where i can find a job as well.
good luck.
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Kevin,
How about at the grocery store in the meat department sounds like you are a pretty good butcher! G2 is not to high the actual problem is crt aging however you where correct in one aspect to correctly fix this problem you need the Sony DAS and interface mainly to reset the white balance and brightness limiter settings in the eprom!
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Hi,
Wow this forum is getting a little harsh but hear goes
Rich is correct in the fact that the fix of changing out the resistor is not a real fix and our anonymous post was actually a litte more correct then he was given credit for.This is a excerpt from the fine folks who make this product interpret it as you so choose.
Model: CPD-E500, CPD-G500, GDM-F500R No. 334
Subject: Black Level Drift or White Balance Error Date: January 19, 2001
Symptom:
(1432) Some of these units exhibit increased background raster levels. White balance may
be outside of specifications. This level drifting condition may occur after a short time
period of usage. This condition may be caused by aging of the Cathode elements in
the CRT gun assembly.
Solution: Please adjust the G2 voltage level to restore the correct raster black level. Check the
color temperature against the model specifications and adjust the white balance if
necessary.
Key Code Entries for these symptoms.
1. A-Ctemp: Enter if white balance is ouside specifications and has to be adjusted.
2. A-Brt: Enter if luminence level is outside specifications and has to be adjusted.
Know with that said I point out this refers to a new set with a short amount of usage not for a set that has been in use for a couple years as for what is happening I have gone down this before and if you search my prevouis posts it is all there.
But if you can give me the voltage measurements on q410 EBC,q406 EBC,IC 405 pins 5,6,7,8 Q407 EBC and I will try and help you find the correct fix as for what I have seen cause this failure 1. D403 will cause it c456 has also caused it and r463 has caused this without some voltage measuremnets I can not tell you much more.
Regards,
Cid
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Hi Cid I agree that short term i.e. little use of the monitor maybe caused by the CRT bedding in, but as you said this is not so in an older unit with reasonable use.
Cid you will notice that Kevin suggested connecting a resistor from G2 to Gnd which will stop the G2 circuit from working properly but it will still blank the screen, I do not like this sort of mod as it has taken away the control from the monitor.
Lets wait for the voltage readings.
I replied as I do not like people slagging off others, it is better to point the error of the reply than to insult the poster as I know I did.
Even if Sony do not consider this a problem it is still a fault that seems to be on a lot of the units many that are usable buy turning the brightness to min.
Rich
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Hi Rich,
I too will also quietly wait for the requested voltage measurements. I never said it was not a problem only that all I have ever seen is how to do this MOD on the posts I've read here and elsewhere yet no one has ever stated what has really failed and even more so what it is the workaround is really working around. I whole heartedly agree with you that the post stating that the fix is to put a resistor from G2 to ground was not even close to being a workaround but a compromise of the circuit. I hope that we will soon have the additional info made availible to find this failure and if possible compare it to others we have seen and establish a common failing part to be able to post here and explain why it fails!
Best regards,
Cid
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Greetings All,
I have recently aquired a monitor at work with this same problem. It was inexpensive (and returnable), and since I'm a web developer who has to use both an Apple and PC in order to verify my work in different browsers the 1-2 source switch on it is exacly what I need. What I'm hoping is that fix to this washed-out display problem is generally cheap and easy. From what I can tell from the above posts the answer could be as easy as using Sony's software to adjust the white balance, and somewhere else on this site I saw where it was downloadable for $15 (monitor-repair.com/repair_tips_software). Is that what I need to adjust the white balance in the EPROM, and if so how intuitive is it for a novice to use? I don't mind spending the $15 if I have a fighting chance of getting this monitor to display correctly. How does the software communicate with the monitor's electronics? Is there any proprietary hardware needed? Would it be better to take voltage readings at the locations mentioned above and post them here? In order to find those points on the PCB in the monitor should I get a copy of the schematics or should the be labeled clearly enough for me to find them? Finally, if I were to enlist the aid of a professional repair facility instead of attempting this myself, generally how many hours of labor should I expect to pay for if the solution turns out to be as easy as altering the factory adjustments via Sony's software?
tia!
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Hey Mister rocket scientist!I know its not the g2 itself.
The Digital Alignment system is the way to adust the raster and do the whitebalnace.This is a common problem with this model.By the way I have the software,but before i did i used the resistor fix. I was just trying to help,this software is hard to come by,trustme.It wiil work.
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Hey Mister rocket scientist!I know its not the g2 itself.
The Digital Alignment system is the way to adust the raster and do the whitebalnace.This is a common problem with this model.By the way I have the software,but before i did i used the resistor fix. I was just trying to help,this software is hard to come by,trustme.It wiil work.If anybody has a better idea let me know.
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I was given a DELL P1110 with this same problem. I was wondering if someone can send me the schematics and an explanation of exactly what I need to do to fix it. Please keep in mind this is the first time I have ever tried to repair one. I have used the search function and found all the topics on this, but I don't know what you mean by the g2 etc.. maybe it will make more sense when I see the schematics. Richard I saw a link to a site you posted with the schematics, but it appears it no longer exists.
Thanks in advance!
adamporter@houston.rr.com
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Thanks for the quick reply Rich. The site was back up and I found them. Also I was wondering if anyone has just gotten their's fixed by a Sony repair shop? If so about how much did it cost? Thanks
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This is a common problem with these monitors and there are many posts about it in this forum. The best solution is to change a resistor - R459 on the tube base board to a lower value. It should be 10meg ohms but changing it to a 6.8M ohm should bring the brightness level back to a normal level. Doing the colour restore after changing the resistor should bring it back unless the CRT is faulty.
Of course before making any changes, make sure the voltages are correct on the CRT base and check for high value resistors (1 meg ohm plus) that have drifted out of spec.
Obviously the best solution is to use the DAS software but this is expensive and only Sony service centres have it. The method above is a relable safe alternative.
This message is post by Ade on 12 Dec 03 at this forum.
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This fix worked well for me. I used a 4.7M ohm resistor and my previously unusable p1110 is like new. The only side-effect is that after doing a color restore the monitor's brightness adjustment became inverted. Setting the brightness to 100 makes it dark whereas 0 makes it bright. It's curious, but not problematic.
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Other than inverted brightness control, are there any other side-effects after changing r459 to a lower value? Is this going to shorten the life span of the monitor?
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I just paralleled another 10M Ohm resistor getting down to 5.0 M ohm and Wa-LAAAA
Sweet Color returns!!!
Thanks to all!!!
This is what the internet should be....
Folks sharing ideas and information to help one another....
Eric...
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I have the ACDSee 6.0 and i downloaded the ultrascan p1110 schematic, but i can't seem to view it!
Is there anywhere else I can get this schematic, or perhaps someone can tell me how to view the file i downloaded(the CPD-E500-E_G1_Chassis.djvu one)? Email me at alex.koudrin@paradise.net.nz if possible, i'd appreciate it very much!
Thank you.
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I have the ACDSee 6.0 and i downloaded the ultrascan p1110 schematic, but i can't seem to view it
Is there anywhere else I can get this schematic, or perhaps someone can tell me how to view the file i downloaded(the CPD-E500-E_G1_Chassis.djvu one)? Email me at alex.koudrin@paradise.net.nz if possible, i'd appreciate it very much!
Thank you.
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The key is to "un-clamp" the 2 plastic "claws" on top of the monitor. After taking out the 2 screws from the bottom, while using a small flat-head screw driver to push the clamp down (you will hear a "clicking" noise as if the back cover is going to pop up), use a bigger screw driver to "pry" the cover open. This is how I did it. Good luck!
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Dell P1110 Monitor Resistor Solution -- That's the catch
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May 27 2004, 4:39 PM
I have not been able to find any sales source online or off who demonstate they even know what a high voltage resistor is. I have been treated to a number of "lessons" by electronics parts countermen and other lowlifes on how resistors are not rated by voltage, etc. I know they exist as, in a former incarnation, I used them in TV repair (flyback circuits, etc). But this seems to be lost knowledge (at least in this part of the world).
Anyone that can give me a tip as to where to get these (preferably online) would be appreciated.
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I HAVE A FAULTY SONY TRINITRON PC MONITOR MEDEL MUMBER HMD A220 IT WILL TURN ON BUT THERE IS NO PICTURE AT ALL AND ALL I CAN HEAR IS A QUITE CLICKING NOISE IN THE BACK PLESAE PLEASE HELP ME OUT EMAIL ME BK THANKS
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i'm glad to see that i'm not the only pack-rat tech who would like to fix these monitors!
I just received one of these with exactly the same problem, will let you know what i find!
MF
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Hi everybody,
I may offer you similar way to fix overbrightness problem which works very well for me: i put resistor from 200K to 470K (depends on overbrightness level) between pin 5 of IC405 or joint point of R451, C456 (they are easier accessible) and ground. Less resistor value -- less brightness. This mode doesn't stop any part of circuit working properly.
After background level becomes reasonable i run Colour restore function.
After this -- picture becomes perfect.
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