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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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Toshiba Calibration Fiasco - Model 24-AF43
This is the story of a long saga with a mixed outcome, so make
yourselves a coffee or a strong one and settle in... We have two 24" flat CRT(conventional) TVs in our home - a Sony KV24-S120 and a Toshiba 24AF-43. They aren't huge but they have given very good presentations, esp. for movies. Three months ago I purchased AVIA Guide to Home Theater and performed the "Basic 5"(Contrast, Brightness, Color etc) calibration on both, using the included filters. Both sets reaped much improvement from this simple procedure, and I was quite satisfied. There were times when I swore the picture on both sets was 3-dimensional in quality! I also made avail of AVIA's geometry and overscan patterns, and also adjusted the flyback Focus control on each set - resulting in razor sharp edges to subjects with a much lower sharpness control setting than I ever imagined. Last week I learned of some professional calibrators - ISF I think, who discussed a way to perform the same calibration, with AVIA or either Video Essentials or Digital V.E, through the "hidden" service menus. The procedure seemed simple - Center all 5 user controls, then crack into the service menu. Then, perform the DVD calibration PER INPUT if available. And as always, write down the before/after values of all service menu items changed(subcolor, subhue, etc). I thought this might be a good idea because on both sets I thought the component input seemed a little pinkish compared to the composite(RCA) and RF/cable inputs, even after all the calibrations. I thought that doing it through service menus would help *balance* out the image from input to input. Well, how were my results?? The Sony KV24~ ended up slightly redder, and the Toshiba 24AF~ acquired a bright bluish "glare" for lack of better words. Sure, I saw no difference when viewing a movie either through ch. 3, Video 1 or 2, or Component, but something just wasn't right. After a few days, I decided I'd had enough. I returned all service menu items on both sets relating to color and tint back to their factory positions. I then reperformed the AVIA calibration utilizing the user controls, and got the same settings results as I did 3 months ago with both sets. The Sony in particular is right on track. Now here's the quandary: The Toshiba still has that "Xenon headlight" glare, especially with outdoor scenes and with light-colored clothing. The effect was particularly glaring when I performed the following experiment: I took photos of both the Sony and the Toshiba playing a B&W oldie movie on Turner Classics. Analyzing the two, I could not get over how "blue" and overly bright the Toshiba's image was compared to the almost warm Sony black & white. I will leave you all with the following: All color/brightness/contrast/tint settings in service mode are back to factory default. No cutoff/bias or drive/gains were adjusted on either set. I would appreciate any suggestions you folks have with regards to my Toshiba, as that is the living room - Read: Home Theater - center piece. Going into those service menus did *something* to that picture, I just don't know for the life of me what. Your thoughts/comments/suggestions are appreciated. |
#2
Posted to sci.electronics.repair
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Toshiba Calibration Fiasco - Model 24-AF43
ChrisCoaster wrote: snip Now here's the quandary: The Toshiba still has that "Xenon headlight" glare, especially with outdoor scenes and with light-colored clothing. The effect was particularly glaring when I performed the following experiment: I took photos of both the Sony and the Toshiba playing a B&W oldie movie on Turner Classics. Analyzing the two, I could not get over how "blue" and overly bright the Toshiba's image was compared to the almost warm Sony black & white. I will leave you all with the following: All color/brightness/contrast/tint settings in service mode are back to factory default. No cutoff/bias or drive/gains were adjusted on either set. I would appreciate any suggestions you folks have with regards to my Toshiba, as that is the living room - Read: Home Theater - center piece. Going into those service menus did *something* to that picture, I just don't know for the life of me what. Your thoughts/comments/suggestions are appreciated. I assume you performed all these calibrations with the sets having run for at least 30 minutes? components drift slightly in value as they warm up and the crt also needs time to reach it's optimum performance. you may also want to check components like capacitors in the rgb path and perhaps the sets' b+ line (especially if there seems to be poor regulation on bright scenes). remember that with any equipment, all tweaking is simply a compromise: recognize that you may never get a 'perfect' picture or colour balance and try to live with what you have or you'll probably end up going mad! B. |
#3
Posted to sci.electronics.repair
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Toshiba Calibration Fiasco - Model 24-AF43
At some point you may have adjusted the G2 control when you thought you were
adjusting the focus on the flyback. Either that or you adjusted some setting in the service menu that you did not set back correctly. Leonard "ChrisCoaster" wrote in message oups.com... This is the story of a long saga with a mixed outcome, so make yourselves a coffee or a strong one and settle in... We have two 24" flat CRT(conventional) TVs in our home - a Sony KV24-S120 and a Toshiba 24AF-43. They aren't huge but they have given very good presentations, esp. for movies. Three months ago I purchased AVIA Guide to Home Theater and performed the "Basic 5"(Contrast, Brightness, Color etc) calibration on both, using the included filters. Both sets reaped much improvement from this simple procedure, and I was quite satisfied. There were times when I swore the picture on both sets was 3-dimensional in quality! I also made avail of AVIA's geometry and overscan patterns, and also adjusted the flyback Focus control on each set - resulting in razor sharp edges to subjects with a much lower sharpness control setting than I ever imagined. Last week I learned of some professional calibrators - ISF I think, who discussed a way to perform the same calibration, with AVIA or either Video Essentials or Digital V.E, through the "hidden" service menus. The procedure seemed simple - Center all 5 user controls, then crack into the service menu. Then, perform the DVD calibration PER INPUT if available. And as always, write down the before/after values of all service menu items changed(subcolor, subhue, etc). I thought this might be a good idea because on both sets I thought the component input seemed a little pinkish compared to the composite(RCA) and RF/cable inputs, even after all the calibrations. I thought that doing it through service menus would help *balance* out the image from input to input. Well, how were my results?? The Sony KV24~ ended up slightly redder, and the Toshiba 24AF~ acquired a bright bluish "glare" for lack of better words. Sure, I saw no difference when viewing a movie either through ch. 3, Video 1 or 2, or Component, but something just wasn't right. After a few days, I decided I'd had enough. I returned all service menu items on both sets relating to color and tint back to their factory positions. I then reperformed the AVIA calibration utilizing the user controls, and got the same settings results as I did 3 months ago with both sets. The Sony in particular is right on track. Now here's the quandary: The Toshiba still has that "Xenon headlight" glare, especially with outdoor scenes and with light-colored clothing. The effect was particularly glaring when I performed the following experiment: I took photos of both the Sony and the Toshiba playing a B&W oldie movie on Turner Classics. Analyzing the two, I could not get over how "blue" and overly bright the Toshiba's image was compared to the almost warm Sony black & white. I will leave you all with the following: All color/brightness/contrast/tint settings in service mode are back to factory default. No cutoff/bias or drive/gains were adjusted on either set. I would appreciate any suggestions you folks have with regards to my Toshiba, as that is the living room - Read: Home Theater - center piece. Going into those service menus did *something* to that picture, I just don't know for the life of me what. Your thoughts/comments/suggestions are appreciated. |
#4
Posted to sci.electronics.repair
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Toshiba Calibration Fiasco - Model 24-AF43
On 6 Apr 2006 03:56:02 -0700, "ChrisCoaster"
wrote: This is the story of a long saga with a mixed outcome, so make yourselves a coffee or a strong one and settle in... We have two 24" flat CRT(conventional) TVs in our home - a Sony KV24-S120 and a Toshiba 24AF-43. They aren't huge but they have given very good presentations, esp. for movies. Three months ago I purchased AVIA Guide to Home Theater and performed the "Basic 5"(Contrast, Brightness, Color etc) calibration on both, using the included filters. Both sets reaped much improvement from this simple procedure, and I was quite satisfied. There were times when I swore the picture on both sets was 3-dimensional in quality! I also made avail of AVIA's geometry and overscan patterns, and also adjusted the flyback Focus control on each set - resulting in razor sharp edges to subjects with a much lower sharpness control setting than I ever imagined. Last week I learned of some professional calibrators - ISF I think, who discussed a way to perform the same calibration, with AVIA or either Video Essentials or Digital V.E, through the "hidden" service menus. The procedure seemed simple - Center all 5 user controls, then crack into the service menu. Then, perform the DVD calibration PER INPUT if available. And as always, write down the before/after values of all service menu items changed(subcolor, subhue, etc). I thought this might be a good idea because on both sets I thought the component input seemed a little pinkish compared to the composite(RCA) and RF/cable inputs, even after all the calibrations. I thought that doing it through service menus would help *balance* out the image from input to input. Well, how were my results?? The Sony KV24~ ended up slightly redder, and the Toshiba 24AF~ acquired a bright bluish "glare" for lack of better words. Sure, I saw no difference when viewing a movie either through ch. 3, Video 1 or 2, or Component, but something just wasn't right. After a few days, I decided I'd had enough. I returned all service menu items on both sets relating to color and tint back to their factory positions. I then reperformed the AVIA calibration utilizing the user controls, and got the same settings results as I did 3 months ago with both sets. The Sony in particular is right on track. Now here's the quandary: The Toshiba still has that "Xenon headlight" glare, especially with outdoor scenes and with light-colored clothing. The effect was particularly glaring when I performed the following experiment: Can you get your hands on a colorimeter to set your white level/colour temperature? Tom I took photos of both the Sony and the Toshiba playing a B&W oldie movie on Turner Classics. Analyzing the two, I could not get over how "blue" and overly bright the Toshiba's image was compared to the almost warm Sony black & white. I will leave you all with the following: All color/brightness/contrast/tint settings in service mode are back to factory default. No cutoff/bias or drive/gains were adjusted on either set. I would appreciate any suggestions you folks have with regards to my Toshiba, as that is the living room - Read: Home Theater - center piece. Going into those service menus did *something* to that picture, I just don't know for the life of me what. Your thoughts/comments/suggestions are appreciated. |
#5
Posted to sci.electronics.repair
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Toshiba Calibration Fiasco - Model 24-AF43
Time for a Professional to get into your sets after you FUBARD then, Eh??
Call an authorized service for the set, tell them what you have done, and ask for an estimate to readjust them to factory specifications. If you are going to screw with the service menus at least write down the flipping parameter values before changing any of them. That way you, or a tech, will at least have half a chance at setting it back to original. "Tom MacIntyre" wrote in message ... On 6 Apr 2006 03:56:02 -0700, "ChrisCoaster" wrote: This is the story of a long saga with a mixed outcome, so make yourselves a coffee or a strong one and settle in... We have two 24" flat CRT(conventional) TVs in our home - a Sony KV24-S120 and a Toshiba 24AF-43. They aren't huge but they have given very good presentations, esp. for movies. Three months ago I purchased AVIA Guide to Home Theater and performed the "Basic 5"(Contrast, Brightness, Color etc) calibration on both, using the included filters. Both sets reaped much improvement from this simple procedure, and I was quite satisfied. There were times when I swore the picture on both sets was 3-dimensional in quality! I also made avail of AVIA's geometry and overscan patterns, and also adjusted the flyback Focus control on each set - resulting in razor sharp edges to subjects with a much lower sharpness control setting than I ever imagined. Last week I learned of some professional calibrators - ISF I think, who discussed a way to perform the same calibration, with AVIA or either Video Essentials or Digital V.E, through the "hidden" service menus. The procedure seemed simple - Center all 5 user controls, then crack into the service menu. Then, perform the DVD calibration PER INPUT if available. And as always, write down the before/after values of all service menu items changed(subcolor, subhue, etc). I thought this might be a good idea because on both sets I thought the component input seemed a little pinkish compared to the composite(RCA) and RF/cable inputs, even after all the calibrations. I thought that doing it through service menus would help *balance* out the image from input to input. Well, how were my results?? The Sony KV24~ ended up slightly redder, and the Toshiba 24AF~ acquired a bright bluish "glare" for lack of better words. Sure, I saw no difference when viewing a movie either through ch. 3, Video 1 or 2, or Component, but something just wasn't right. After a few days, I decided I'd had enough. I returned all service menu items on both sets relating to color and tint back to their factory positions. I then reperformed the AVIA calibration utilizing the user controls, and got the same settings results as I did 3 months ago with both sets. The Sony in particular is right on track. Now here's the quandary: The Toshiba still has that "Xenon headlight" glare, especially with outdoor scenes and with light-colored clothing. The effect was particularly glaring when I performed the following experiment: Can you get your hands on a colorimeter to set your white level/colour temperature? Tom I took photos of both the Sony and the Toshiba playing a B&W oldie movie on Turner Classics. Analyzing the two, I could not get over how "blue" and overly bright the Toshiba's image was compared to the almost warm Sony black & white. I will leave you all with the following: All color/brightness/contrast/tint settings in service mode are back to factory default. No cutoff/bias or drive/gains were adjusted on either set. I would appreciate any suggestions you folks have with regards to my Toshiba, as that is the living room - Read: Home Theater - center piece. Going into those service menus did *something* to that picture, I just don't know for the life of me what. Your thoughts/comments/suggestions are appreciated. |
#6
Posted to sci.electronics.repair
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Toshiba Calibration Fiasco - Model 24-AF43
I thought he covered that when he wrote:
The procedure seemed simple - Center all 5 user controls, then crack into the service menu. Then, perform the DVD calibration PER INPUT if available. And as always, write down the before/after values of all service menu items changed(subcolor, subhue, etc). .... I will leave you all with the following: All color/brightness/contrast/tint settings in service mode are back to factory default. No cutoff/bias or drive/gains were adjusted on either set. So while your suggestion was probably intended to be helpful, you should have read the post more thoroughly. Art wrote: Time for a Professional to get into your sets after you FUBARD then, Eh?? Call an authorized service for the set, tell them what you have done, and ask for an estimate to readjust them to factory specifications. If you are going to screw with the service menus at least write down the flipping parameter values before changing any of them. That way you, or a tech, will at least have half a chance at setting it back to original. "Tom MacIntyre" wrote in message ... |
#7
Posted to sci.electronics.repair
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Toshiba Calibration Fiasco - Model 24-AF43
Seen way to many customer screwed sets as a result of inexperience in
dealing with the service only menues. Just a bit of information that I hope more than just you read and understand!! IMHO; Cheers "Mike Berger" wrote in message ... I thought he covered that when he wrote: The procedure seemed simple - Center all 5 user controls, then crack into the service menu. Then, perform the DVD calibration PER INPUT if available. And as always, write down the before/after values of all service menu items changed(subcolor, subhue, etc). ... I will leave you all with the following: All color/brightness/contrast/tint settings in service mode are back to factory default. No cutoff/bias or drive/gains were adjusted on either set. So while your suggestion was probably intended to be helpful, you should have read the post more thoroughly. Art wrote: Time for a Professional to get into your sets after you FUBARD then, Eh?? Call an authorized service for the set, tell them what you have done, and ask for an estimate to readjust them to factory specifications. If you are going to screw with the service menus at least write down the flipping parameter values before changing any of them. That way you, or a tech, will at least have half a chance at setting it back to original. "Tom MacIntyre" wrote in message ... |
#8
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Toshiba Calibration Fiasco - Model 24-AF43
On Fri, 7 Apr 2006 21:30:56 -0400, "Art"
wrote: Seen way to many customer screwed sets as a result of inexperience in dealing with the service only menues. Just a bit of information that I hope more than just you read and understand!! IMHO; Cheers The biggest problem is, I think, that a written explanation cannot possibly explain what you'll see when you perform the various adjustments for video quality. No matter how many things are provided to make it easier (pluge and SMPTE bars, for example), it is still not something that will be perfect for most people on a first try. Then there's convergence... :-) Tom "Mike Berger" wrote in message ... I thought he covered that when he wrote: The procedure seemed simple - Center all 5 user controls, then crack into the service menu. Then, perform the DVD calibration PER INPUT if available. And as always, write down the before/after values of all service menu items changed(subcolor, subhue, etc). ... I will leave you all with the following: All color/brightness/contrast/tint settings in service mode are back to factory default. No cutoff/bias or drive/gains were adjusted on either set. So while your suggestion was probably intended to be helpful, you should have read the post more thoroughly. Art wrote: Time for a Professional to get into your sets after you FUBARD then, Eh?? Call an authorized service for the set, tell them what you have done, and ask for an estimate to readjust them to factory specifications. If you are going to screw with the service menus at least write down the flipping parameter values before changing any of them. That way you, or a tech, will at least have half a chance at setting it back to original. "Tom MacIntyre" wrote in message ... |
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