Official Pioneer Kuro Reddish Tint Problem Thread - Page 7

Originally Posted by stroud

I haven't tested this approach, but it looks like the clearing options are available under the etc+ node of the service menu.

See attached page, you can see Hour Meter and Pulse Meter (CHM and CPM) listed along side the equivalent RS232 commands.

Originally Posted by AlanBuck

Do you mean you can access these with the regular remote control or Control-Cal?

Originally Posted by saprano

Its amazing that theres a fix for this. I don't have any red tint problems with my 151 but since its caused by aging is everyone with a kuro going to experience this?

D-nice if your reading this, what do think about this fix?

Originally Posted by saprano

Alan, why don't you call pioneer? I thought they are taking care of the problem regardless of warranty?

Originally Posted by 1forsnow

ok thanks. mine is a krp-500m. i think my issue is the VOL RST P, but im not sure what my value is near. yours is at 023, but mascior is at 108. thats a big difference. i followed your procedures, but getting pink sparkles now. i know those values should not have changed, but im not sure why i have these sparkles now. thanks again for your help

Originally Posted by 440forpower

What number are we shooting for on the VOL RST P if we get the pink sparkles? I really want to try this myself but want to get a little more info before I proceed. Thanks

Originally Posted by saprano

Alan, why don't you call pioneer? I thought they are taking care of the problem regardless of warranty?

Originally Posted by AlanBuck

So what we have here is a milder case of the Panasonic rising blacks issue...but with a red tint thrown in. I have control-cal. Wonder if I can use that to reset the panel? Or can one use the factory remote to do all this? I sure don't want to tackle fixing a subtle problem and end up with a big mess unless I know exactly what I am doing! lol

Originally Posted by astrodoob

I checked the black level (visual only) in a totally dark room before going to bed. Black is BLACK. A very very slight glow... but definitely darker than what I had previously. My Kuro's MLL measured 0.003 before resetting the two counters and did notice it was darkish grey (mine did not have red tint... but noticed it wasn't as black as it use to be).

I will confirm tonight when I use the D3 PRO and check the black level.
I reckon the D3 PRO will struggle. BLACK LEVEL has definitely droppped in value.

No sparkles on mine, everything looks A+ OK!

Extremely happy KURO owner! Woooo Hoooo!

Originally Posted by fastshasdow

stroud,

does your computer have a serial port or did you have to use a usb adapter? I'm just curious because I cant get my computer to communicate with the tv. I'm using windows xp with hyperterminal and followed everything. I think its my usb adapter that is causing the problem.

Originally Posted by fastshasdow

Yes I have tried different com ports. No luck. Let me know if your successful and how you managed to do it. Btw, what brand is your usb adapter?

Originally Posted by wxman

I don't have the red tint, but do have a grey tint, so no big hurry just yet. Picture is still impressive.

Originally Posted by Mac13

Ya I am wanting to wait until more people have tried it. I have a 500M and I wonder if everything will be the same on different models and since the directions Stroud posted were for a Euro version.

Originally Posted by stroud

I have been working through the service manuals and the procedure is exactly the same for all 9G models. The only slight difference are the tentative voltage setting values but I will describe these later.

I was only confident trying this fix as it is exactly the same procedure used by Pioneer service engineers when servicing the panel.

I can break it down like this. The reason the screens go grey / red is because various corrections are made by the TV (referring to the pulse-meter count) to calculate how long the panel has been used for. My method resets these corrections basically fooling the TV into thinking it has a brand new panel again. Remember that the panel is not brand new so some adjustment maybe required after the clearing procedure. I would be interested to know if it is only people using calibrated settings who have had the red tint over time?


The section below is common to ALL 9G Kuros and is straight from the service manual.


8.4 ADJUSTMENT WHEN THE SERVICE PANEL ASSY IS REPLACED

After the panel is replaced with one for service, voltage margin adjustment is required.

Basically, voltage margin adjustment is performed using the Panel Factory menu.
After the panel is replaced and the unit is turned on, clear the pulse meter first.
For details on how to clear the pulse meter, see "8.3 HOW TO CLEAR HISTORY DATA".

∗1: As various corrections are made referring to the pulse-meter count to calculate how long the panel has been used, if adjustment of the panel for service is performed without clearing the pulse-meter count, proper adjustments will not be performed.

∗2: The drive sequence for Video 60-Hz is used for adjustment. When adjustment is made using the Panel Factory menu, the current drive sequence is displayed on the screen, as shown in the figure below. Make sure that 60VS is always indicated during adjustment.


Procedures for resetting corrections for change over time:

Turn the unit on. / [PON]
Enter Factory mode. / [FAY]
Set PM/B1-B5 to CLEAR (to clear the pulse meter). / [CPM]
Set HR-MTR to CLEAR (to clear the hour meter). / [CHM]
Turn the unit off. / [POF]

∗ To reflect the results of log clearing for each correction function,
the unit must be turned off then back on again. Before adjustment,
be sure to turn the unit off then back on again.


The next part of the section regards the tentative voltage settings. These do vary slightly depending on which model you have. Only change these using the remote and only if you have issues after clearing. These tentative settings are a safe default if you get stuck. Where it says "indication value", these are the values you already have so no need to change them.

Procedures for stabilizing the panel before adjustment:

Turn the unit on. / [PON]
Enter Factory mode. / [FAY]

For 5020FD / LX5090

Setting Item Tentative Setting Value
VOL SUS / [VSU ∗∗∗] 128
VOL OFFSET / [VOF ∗∗∗] VOF indication value
VOL RST P / [VRP ∗∗∗] VRP indication value
VOL XPOFS1 / [VX1 ∗∗∗] 085
VOL XPOFS2 / [VX2 ∗∗∗] 047
VOL YNOFS1 D / [V1F ∗∗∗] V1F indication value
VOL YNOFS3 D / [V3F ∗∗∗] V3F indication value +0
VOL YNOFS4 D / [V4F ∗∗∗] V4F indication value
VOL YNOFSA D / [VYF ∗∗∗] 128

For 101FD / 500M

Setting Item Tentative Setting Value
VOL SUS / [VSU ∗∗∗] 128
VOL OFFSET / [VOF ∗∗∗] VOF indication value
VOL RST P / [VRP ∗∗∗] VRP indication value
VOL XPOFS1 / [VX1 ∗∗∗] 085
VOL XPOFS2 / [VX2 ∗∗∗] 063
VOL YNOFS1 D / [V1F ∗∗∗] V1F indication value
VOL YNOFS3 D / [V3F ∗∗∗] V3F indication value +0
VOL YNOFS4 D / [V4F ∗∗∗] V4F indication value
VOL YNOFSA D / [VYF ∗∗∗] 128

6020FD / LX6090 / 600M

Setting Item Tentative Setting Value
VOL SUS / [VSU ∗∗∗] 128
VOL OFFSET / [VOF ∗∗∗] VOF indication value
VOL RST P / [VRP ∗∗∗] VRP indication value
VOL XPOFS1 / [VX1 ∗∗∗] 105
VOL XPOFS2 / [VX2 ∗∗∗] 063
VOL YNOFS1 D / [V1F ∗∗∗] V1F indication value
VOL YNOFS3 D / [V3F ∗∗∗] V3F indication value +0
VOL YNOFS4 D / [V4F ∗∗∗] V4F indication value
VOL YNOFSA D / [VYF ∗∗∗] 128

It is interesting that there is a difference between 5020/5090 and 500M in the VOL XPOFS2 value only, but this doesn't apply to the 60" TVs.

The most interesting value is VOL RST P which seems to concern black levels and is the one Pioneer themselves adjusted on mascior's TV. If you adjust to low you get sparkles (although I didn't), to high and the MLL or black luminence is raised and you can see the black turn to grey again. If you have an issue of too much black, raise VOL RST P but don't raise it too high or you will lose your inky blacks.

I personally don't think it is possible to brick the TV with these voltage margin adjustments but I will not guarantee this and you do it at your own risk. I have had VOL RST P down to 010 and up to 118 without issue.

I have set all my voltages to the tentative values apart from VOL RST P which I have raised to 062. The picture is now perfect and I tested it for 6 hours straight last night (Alien Anthology). No artefacts, no sparkles, no excess heat and bezel matching blacks

Originally Posted by mascior

Stroud,

I was able to tweek sum adjustments...I played with VOL RST P and dropped it to zero, WOW talk about black but it caused sparkles. After talking to a Pioneer engineer last week he said adjusting VOL SUS up a bit would cure sparkles as well. So now my VOL SUS is 198, VOL RST P is 018, and I adjusted my FS1, 3, & 4 D voltages up 20 clicks each. Now I have really deep blacks(Bezel blending) and no sparkles. I will keep testing.

Originally Posted by stroud

Nice to hear from you mascior, I too dropped VOL RST P right down but I had an issue with too much black. It was very black!!!

The issue I found is that the black would persist on screen a little too long if I brought up a menu or OSD. It would kind of melt away but only if black had been on screen for some time (movie bars for example). Raising the VOL RST P cured this completely.

Interesting about the other settings you have changed, I have kind of stuck to the tentative ones for now because I am more than happy with the picture, best it has ever been but expect my curiosity will get the better of me soon.

Interesting about FS1, 3, & 4 D as these settings are interlinked on the FSA D setting. I imagine this also changed?

From the service manual:

For the 9th-generation PDPs, interlocked setting for
Voltages Vyknofs1/3/4 is available on the Factory menu or
with RS232C commands, for easier adjustment. Therefore,
in the adjustment flowchart, the interlocked setting function
is used. (Individual setting for each adjustment value is
also possible, as in the conventional setting methods.

Vyknofs1,3,4 interlocked - VOL YNOFSA D - [VYF]