Just thought that I'd give you all an update on my 5090H red tint issue (it's a story with a happy ending
First a quick bit of background information.
I have a 5090H which is now 2.5 years old (still 2.5 years left on the warranty), I had it professionally calibrated at around 800 hours and the dreaded red tint started to creep in around 5 months after that.
At first, it was only noticeable in the lower right hand corner of the screen (when viewed from the front) but it gradually started to spread over the rest of the screen over the next 12 months or so.
It was basically driving me to distraction and I even tried installing behind screen bias lighting, but that didn't really have much effect.
In short my viewing pleasure was severely disrupted and I could only watch the TV when the main lights in the room were on, else my eyes were always drawn to the red tint.
I've been scanning the forums since I first noticed the issue the best part of 2 years ago hoping for some sort of resolution and the couple of months have provided a wealth of knowledge on the subject
I'd written off actually contacting Pioneer about this as person after person has been given the cold shoulder by their customer services team (in the UK anyway).
I didn't want to reset the pulse / hour meters yet (not until I tried everything else that is) and was excited to see another member having good results with simply tinkering with a couple of the panel adjustments settings, so after purchasing a working USB to DB9 cable (this was more trouble than you might imagine as it took three attempts to get a functioning one) I was ready to start playing.
My panel details were as follows;
Panel Hours = 7824
VOL SUS = 128
VOL OFFSET = 113
VOL RSTP = 034
VOL XPOFS1 = 085
VOL XPOFS2 = 063
VOL YKNOFS1 D = 138
VOL YKNOFS3 D = 128
VOL YKNOFS4 D = 149
VOL YKNOFSA D = 128
Going off the information I had read, I'd be looking at adjusting VOL YKNOFSA D and possibly VOL RSTP (although looking at where my panel had self adjusted to I wasn't sure I'd need to do this).
So with a black test image on screen and the lights off I start reducing VOL YKNOFSA D and it's like watching time roll backwards.
The red tint begins to reduce from the entire screen, then to be concentrated in the lower right hand corner then eventually to be eradicated completely.
The amount I had to reduce VOL YKNOFSA D confirms my suspicion that my panel was badly affected and I had to dial the VOL YKNOFSA D all the way down to 60.
Now my TV is performing like it was new again (better in fact) - With no light in the room (complete blackout) as long as there is some light (to constrict your iris a little) on the screen (to constrict your iris a little) it's not possible to see where the screen ends and the bezel begins
With the bias lighting switched on the screen is indistinguishable from bezel even with a black test image.
I've only run the TV like this for a couple of days so far, but as yet I've noticed no side affects from the adjustment (and I'm actively looking for them) and I'm close to calling the whole thing a complete success!
I'm currently a very happy bunny