Color Bleeding Of Chinese Rgb Panels

[psmmacker]

Not unless the solider joints on the mosfet get hot and cause dried joints btw can someone's make a sheld for vpinball mame only as the real pinball no real use to me but they are inputs from the pinball mcu board

[lightpin]

"10 years electronics experience"

*looks at circuit "schematics" being posted*

[psmmacker]

I got one ali express seller backing this fix we he will send me a free sample panel as my low 8 watt solidering iron screw the chips up i going to use solidering glue on the chip pin and solder the transisters on the copper

[psmmacker]

So light pen what do you think of these repair idears ive come up with

[psmmacker]

Wow the pod do work can turn the brightness up and down may be a 1 ohm resister to be continued and add a extra pod for brightness and copyright da macker 2016 ps the last picture is a 201 pod from a commodore 64 tape deck motor and the shift register is fine put between g1 pin and oe check last pictures of metre test

[psmmacker]

Transister glue with super glue to pcb adding stm 1206 size 1k ohm and wire glue to chip fet legs and solider transister end to copper wire bridge worked 100% only did one panel each set and it seems to fix the ones in the dasiy chain

[psmmacker]

Why is this p3 2015 version has diffent 4 ic on this board sm 5166p at t1 t2 t3 t4 has replaced the 16 x 4953 anyone noticed this and these work 100% slight bleed on the edge  but not as bad this seller 100 % recommend  all pictures have the same sm chips and no 4953 as below can anyone point me to a pinout onof 5166p 16 pin dip ic they called 

NIPPON PRECISION CIRCUITS  SM5160CM  FREQ SYNTHESISER PLL, 5160, SOIC16

All of our led modules has no blanking

Plus look at bottom picture these old panels was made 2013 06 01 with the 4953

Updated information

If the.gio pin on the real pinball input are unused while using vpinmame usb these pin are.exposed and need to be bridged to stop colour bleed that why the new stm without shield dont show signs of this problem

And prehapes this changing the cystal osolator to a 25 mhz 

http://andybrown.me.uk/2015/03/03/modding-the-stm32-f4-discovery-with-a-25mhz-clock/

Add the -5 volt + 3 gnds on hub75 may also help bleeding as good gounding is key maybe diods the 6 rgb inputs from the stm32 discovery 

 

 Cheers paul

 

[freneticamnesic]

I don't know what all that nonsense was about. Anyways, I decided to jump in and do this fix myself, I used 0605 2.2k ohm resistors (it's what I had on hand) and it works fantastic. Figured I'd just give my feedback on this since I bet a lot of people are just dealing with the issue, or maybe it's fixed on newer panels. Anyways, if you've ever soldered before, I'd say you can do this. The worst part is trying to see everything, so having a decent magnification setup will help immensely.