Pioneer Kuro PDP-LX5090 7 blinks intermittent

[tom66]

Re: Pioneer Kuro PDP-LX5090 7 blinks intermittent

I was able to rid the red tint and get the black level so low that I cannot see it except with the no signal display. When watching a movie it is completely gone. I want to tweak it more to see if I can sort out some black level unevenness on the no signal display (disappears with video display.)

VOL SUS = 155 (from 128)
VOL OFFSET = 140 (unchanged)
VOL RST P = 009 (from 031)
VOL XPOFS1 = 085 (unchanged)
VOL XPOFS2 = 045 (unchanged)
VOL YKNOFS1,2 D = 015 (from 143)
VOL YKNOFS3 D = 110 (from 128)
VOL YKNOFS4 D = 170 (from 128)

Conventional Kuro wisdom says to adjust all the KNOFS voltages by the same amount - but you get significantly better results by not doing this.

These voltages will vary for other panels but work for mine with 12,500 hours usage and 600 billion pulse counter.

[Shinju]

Re: Pioneer Kuro PDP-LX5090 7 blinks intermittent

Well done sir. So what program are you using to get into the TV via USB/RS232 connection?

My PDP-V402 has that RS232 port and most of the deep calibration options are done via that port.

[tom66]

Re: Pioneer Kuro PDP-LX5090 7 blinks intermittent

I'm using CuteCom on Linux. You can also use HyperTerminal on Windows.

9600 baud 8N1

Send: \x02**PON\x03 (\x02 is hex for 0x02, etc.)

and set should power ON

Then send \x02**FAY\x03

to enter service menu.

Everything else is done with remote control. PANEL FACTORY -> PANEL-1 ADJ

Initially you want to lower the YKNOFS1,2 D until the red tint goes. As you do this you will start to get magenta stuck pixels. Then you want to increase YKNOFS3 & 4 D until the magneta sparkles go. If you start getting IR play with VOL SUS but do not exceed 190 or the set may shut down on bright images. Lower VOL RST P until you start seeing bleed in of black pixels when switching from 21:9 to 16:9 content.

[Bjames]

Re: Pioneer Kuro PDP-LX5090 7 blinks intermittent

I have a pioneer pro 1150hd with the same 8 blinking lights that would turn on sometimes but finally just gave the quits. Im not sure how similar these twoodels are but i have to imagone there similar enough to diagnose. I have already tested to power supply board and there is still power going to the main board and audio board. Thanks and if imin weong forum jus let me know

[heavymachines]

Re: Pioneer Kuro PDP-LX5090 7 blinks intermittent

Bingo

NJM2846 on board 1.8V regulator
Working = 1.79V
Faulty = 0.01V, control signal & Vin still present (3.3V)

On Audio_IO board

Did you check this? Tom66 has given a huge clue... Did you read entire thread?