Official Pioneer Kuro Reddish Tint Problem Thread - Page 99 - AVS Forum | Home Theater Discussions And Reviews

View Poll Results: Does your Kuro have a reddish tint to the blacks?
KRP-500M/KRP-600M - NO 18 13.95%
5020FD/6020FD - NO 5 3.88%
111FD/151FD - NO 19 14.73%
101FD/141FD - NO 11 8.53%
Other/Older Model (please post) - NO 9 6.98%
KRP-500M/KRP-600M - YES 28 21.71%
5020FD/6020FD - YES 16 12.40%
111FD/151FD - YES 14 10.85%
101FD/141FD - YES 7 5.43%
Other/Older Model (please post) - YES 6 4.65%
Multiple Choice Poll. Voters: 129. You may not vote on this poll

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post #2941 of 2946 Old 10-05-2016, 02:29 PM
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Quote:
Originally Posted by cfraser View Post
Anybody still reading this thread? I have a 151 with I'll guess 12-15k hours, haven't checked for a while. I don't now have or never have had a problematical red tint like many have described, but I can see a touch of faint reddishness mainly in the lower part of the screen in a pitch dark room. But I am picky, I (and only I apparently...) can see it's there, and I can measure it's there. I'm not sure I can see it when there's any content on the screen (imagination?...). It's been a little over 3 years since I last adjusted for it, and I guess the aging algorithm has bumped it up again.

What I did last time was adjust VYF to 068 (from stock 128). I found 055 was as low as I could go before I'd get the start of sparkling in some of the mask patterns, and I think the service manual suggested to go 013 higher than that point (that's based on my interpretation of my notes from 2013).

I haven't read the whole thread, but I did pick up on the opinion that the 151 is somewhat difficult to adjust re this reddish tint. I didn't pick up on why this is though. So what I'd like to know is, at VYF=068, am I at about the limit of what I can easily do with this 151 re the black level? Or should I still consider dropping VYF a little more (have that 013 "margin") and see if it does any good? Not sure I want to do a panel reset at this point since everything is actually very good, though black has crept up to ~0.003 ft-L now (that's in Pure mode which I use for OTA, it's barely measurable in ISF mode for whatever reason). I also read there are problems with going too low with VYF, none of which I've noticed at the current setting. Thanks.
You should consider yourself lucky that your set can handle VYF as low as 68. Is your set a 2009 build? I've heard those can handle lower VYF than the 2008 sets.

All of the 2008 sets I've played with can handle nothing lower than 98.

If you don't see the tint on content, leave it alone. Your other option would be a pulse meter reset, but the severity of your red tint doesn't seem to warrant such an aggressive solution... yet.

Pioneer Kuro KRP-500M
Pioneer Kuro PRO-141FD
Pioneer Kuro PRO-111FD x 2
Pioneer Kuro PDP-5020 x 2
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post #2942 of 2946 Old 10-05-2016, 07:21 PM
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^ My 151 is a Dec. 2008 build. It does not match any of the general panel characteristics I've seen posted about "2008" builds over the years (not even close actually). I vaguely recall reading that there were significant changes in panels starting in Nov. '08, I forget the details, a factory/production change, that sort of thing. This has been unfortunate for me because most of the typical helpful "151 info" in the forums hasn't been very useful...I guess there weren't a lot of 151s made with these newer panels/setups, because about 2 weeks after I got my 151 (in early '09) Pio gave "the notice".

Thanks for the info. Yeah, I'm of the "if it ain't broke..." mentality usually too, but I had my instruments out doing a cal check and decided to ask before I tried to "fix" this minor thing.
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post #2943 of 2946 Old 10-07-2016, 03:14 PM
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Quote:
Originally Posted by cfraser View Post
^ My 151 is a Dec. 2008 build. It does not match any of the general panel characteristics I've seen posted about "2008" builds over the years (not even close actually). I vaguely recall reading that there were significant changes in panels starting in Nov. '08, I forget the details, a factory/production change, that sort of thing. This has been unfortunate for me because most of the typical helpful "151 info" in the forums hasn't been very useful...I guess there weren't a lot of 151s made with these newer panels/setups, because about 2 weeks after I got my 151 (in early '09) Pio gave "the notice".

Thanks for the info. Yeah, I'm of the "if it ain't broke..." mentality usually too, but I had my instruments out doing a cal check and decided to ask before I tried to "fix" this minor thing.
Yeah you most likely have what is termed as a 9.5 gen 60 inch set. I've been hunting for one myself for several years with no luck.

Leave it alone until it becomes obvious on content.

Pioneer Kuro KRP-500M
Pioneer Kuro PRO-141FD
Pioneer Kuro PRO-111FD x 2
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post #2944 of 2946 Old 10-10-2016, 11:38 AM
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Is there a specific post or thread someone can point me to for a step-by-step on how to lower voltage for my 151? I recently starting getting the red tint along the very top middle of the screen
I'm also a noob in all this service settings stuff... but I plan on getting ControlCal and the cables... but not sure what to do after that to start adjusting the voltage.
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post #2945 of 2946 Old 10-13-2016, 12:05 PM
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^ My memory of the exact details is sketchy since I haven't done my 151 for so long, and likely won't for (hopefully) a long time again (see above). But you don't need ControlCal to do it. Lacking a Service Remote (like most of us) or a pretty old PC, you will need a USB->RS232 converter. I use a Tripp Lite one which works with all sorts of stuff, but there are likely lots of others that work fine too, just don't skimp too much, there are lots of iffy/crappy/cheap ones. Plus a simple terminal program for your PC. And you'll probably want to use your remote too.

I use the USB->RS232/terminal to enter the service mode and to send various commands or settings. I mostly use the remote to look at stuff, but you can use it to adjust some settings too. That's all I remember. Except that in this particular model, adjusting "VYF" downwards is probably the only thing you'll need/want to adjust to help tame the red tint, unless you get into doing a panel reset (this whole thread). You'll need ControlCal to use the ISF modes, extremely worthwhile. You'll need the USB->RS232 for that too, so might as well get that first because you'll need it regardless.
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post #2946 of 2946 Old 10-13-2016, 01:54 PM
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No red tint, checked it in dark room, if anything the black levels are slightly elevated since I bought it (Dec 2007) but still far better than any LCD in the house.

Model 5080HD, Still working excellent to this day (Knock on wood).
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