Question about Sony VPH-G90U Remanufactured CRT Graphics Projector (VPH G90U, VPHG90U, VPH-G90, VPH G90, VPHG90) Multimedia Projector
When you look into the red gun you can see a shimmer or fuzzynes going on and the image on a test pattern looks like its slightly out of focus , but when you put a signal onto it either composite or rgb the red goes way out of focus and the shimmering goes crazy like the signal path is going across high voltage of some sort thanks for any help.
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Posted on Jan 02, 2017
SOURCE: Picture - Flickers/Shimmers
Definatly has a problem it sounds like my freind. Could be a problem with the abl circuit, the picture tube or a voltage regulation problem. Good Luck PS Please dont forget to rate this thread.
Posted on Oct 23, 2006
SOURCE: Philips 42" Plasma
It's likely the upper Y-module but both the upper and lower could be having problems - just nothing noticeable in the lower half of the screen as yet, is my guess..
This is not a job for a layman and you'll need some fairly sophisticated equipment to troubleshoot the boards, not to mention being able to read schematics and understand waveforms. Hence, my best advice would be to take it in to a reputable shop and have it estimated...
If you need some help locating a shop near you try the NESDA locator - http://www.nesda.com/locator/state_search.php
Posted on Nov 11, 2007
To access the focus block with the screen controls, remove the 2 plugs under the speaker grille. There is a philips head screw under each plug. Remove both screws. the speaker grill is now free. Pull the bottom forward and the grille will come off. The top is just held by tabs behind the screen bezel. Be careful as there is wiring to the grille for video input 2 and the front panel controls. There is a piece of fiberboard held on by 4 screws in the center which was formerly covered by the grille. Remove the screws and the panel and the focus block is right there. Each color is labeled for both screen level and focus. Adjust the screen control of the color producing the lines until the lines just disappear.
Posted on Mar 31, 2008
Wow, I've been an installer and salesman in the consumer electronics industry since before the first plasma TV came out (Phillips 42" and Fujitsu 42" in 1996) and this is the first time I've ever seen that kind of an answer. "Take this to a repairman and he can add more plasma" what is the repairman a doctor. If it were that easy no one would ever have to upgrade or replace their screens. You can't add more plasma to a screen, if you don't believe me call Samsung and ask them for yourself like I did. I was actually so dumbfounded by your answer that I called a tech friend of mine at Samsung and asked him, his answer; "does this guy work for you?" I told him no and he said, "I was going to tell you to fire him because that's the dumbest thing I've ever heard anyone tell a customer".
What you need to do is take you plasma TV to an AUTHORIZED Samsung dealer/repair shop and inquire about the hazing/ghosting problem with them. Follow this link to find an authorized repair center near you: http://www.samsung.com/us/support/repairlocation/serviceLocator.do?group=&type=&subtype=&model_nm=HP-R4262&dType=D&mType=UM&vType=R&prd_ia_cd=&acc_ia_fl=&disp_nm=HP-R4262
Posted on Jun 19, 2008
SOURCE: sony triinitron tv out of focus
Please go to this site for an answer:
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Good Luck to You!
Posted on Aug 16, 2008
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