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Answered Pioneer KRP-500a shows random, flashing pixels

emusa

Established Member
My beloved Pioneer KRP-500a shows signs of old age.. or does it? I have no idea, but the upper part of the screen shows random, flashing pixels from time to time. It seems to be related to the color palette onscreen, because sometime the picture is 100% stable as well.

I've made a video of it, because it's hard to explain:


Does anyone know what's going on, how I can resolve it? or.. is it a sign the Kuro is dying? :(
 

Inferno

Distinguished Member
I think it's called Purple Snakes, a quick adjust of the Y SUS and it will go, if you can get into the service menu that is.
 

emusa

Established Member
I think it's called Purple Snakes, a quick adjust of the Y SUS and it will go, if you can get into the service menu that is.

Thanks for your reply Inferno, I appreciate it. Could you guide me through the process to fix the issue? Would be great.
 

tonnytech

Established Member
i had this on mine but it was a lot worse then yours , on mine it was the entire top end of screen. Anyhow a user named damned found the best fix i found the original post for you see here :-

Pioneer pdp lx5090 red tint to blacks - Part 2 - now open to other models

Tweaking that pot cleared my image up immensly not just the sparkles at top , very easy fix that will put a smile back on your face and kuro once completed :)
 

emusa

Established Member
Thanks @Tonytech, it appears to be exactly what I'm experiencing - although it isn't as severe (yet). How do I "tweak" that pot? I don't have any experience modifying motherboards and/or tech in general.
 

JayCee

Distinguished Member
How do I "tweak" that pot? I don't have any experience modifying motherboards and/or tech in general.

If you're not experienced or comfortable working with electronics you need to find someone who is.
"Tweaking" that potentiometer involves looking at the screen and adjusting it with the back cover removed and the set powered on.
A dangerous thing to do for someone with no experience.
 

Inferno

Distinguished Member
I think it's an easier solution just going into the Service Menu and doing a quick upping of the VOL SUS and Y SUS.

You need a programmable remote to gain access and Email Logitech Customer Service to add the code for you.
 

emusa

Established Member
I think it's an easier solution just going into the Service Menu and doing a quick upping of the VOL SUS and Y SUS.

You need a programmable remote to gain access and Email Logitech Customer Service to add the code for you.

Okay I've got a Harmony One remote. I'll send an email to them, requesting the service menu code.

By how much should I up the VOL you reckon? What is safe?
 

Inferno

Distinguished Member
Try 20 and see if it has stopped, you can go to 200+ iirc, but you wont need to go anywhere near that, if it has stopped at 20 try backing it off more. or go up 5 at a time till it stops.
 

emusa

Established Member
Try 20 and see if it has stopped, you can go to 200+ iirc, but you wont need to go anywhere near that, if it has stopped at 20 try backing it off more. or go up 5 at a time till it stops.

@Inferno So I requested the code from Logitech ánd Pioneer, for my Harmony One remote.. Unfortunately Logitech claims they don't have the code and they directed my to Pioneer. Pioneer on their turn said the internet is filled with stupid people giving out wrong advice and that they would't/couldn't give me the code :confused:

Really disappointing.. You know another way of getting the code, maybe someone here on this forum? I really want to get rid of the purple snakes, without having to pay A LOT by going to a servicecentre.
 
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Inferno

Distinguished Member
Ok, so contact Harmony again and ask them to add this HEX code / PRONTO Command to your Harmony REMOTE'S TV setting.

All this is in one and there is no gaps, it only has gaps in it to make it easier to follow for inputting purposes.

0000 0068 0000 0022 0168 00b4 0016 0016 0016 0043 0016 0016 0016 0043 0016 0016 0016 0043 0016 0016 0016 0043 0016 0043 0016 0016 0016 0043 0016 0016 0016 0043 0016 0016 0016 0043 0016 0016 0016 0043 0016 0043 0016 0043 0016 0043 0016 0043 0016 0016 0016 0043 0016 0016 0016 0016 0016 0016 0016 0016 0016 0016 0016 0016 0016 0043 0016 0016 0016 0043 0016 03dd

PC.jpg
 
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Mikez64

Standard Member
Has anyone tried a broadlink rm mini or the rm pro? These are cheap and can do learning. You can save the template for the remote in the cloud to be used by others.
 

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