Build Your Own Arcade Controls Forum
Main => Monitor/Video Forum => Topic started by: bertthedefender on November 11, 2016, 08:59:16 am
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Hello everyone,
I've got a 28" Polo in my *very* unfinished Mame cabinet - it's not had much use of the last few years but I fire it up every now and then and it works great. However, I was scanning the chassis recently and noticed how the PCB under one of those white square resistors looks discoloured due to heat (see attachment)
So my noob question is - is that normal, or indicative of some impending issue?
Also, I've noticed it has the original flyback with the light grey front - I think I've read somewhere that these were prone to early failure? Anyone know where I could get a spare for the cupboard, either in the UK or with international shipping?
Cheers!
Simon.
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it's fairly typical of these old phenolic boards. it's less noticeable in newer fiberglass boards. they get pretty dark when they get heated. that resistor is dissipating probably 8 to 10 watts of power while it's running.
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It's normal on Polos that the high wattage resistors (including the PTC) blacken the board underneath due to heat:
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Brilliant - thanks very much for the quick replies! The monitor is my favourite part of the machine - I know they can do all sorts of things with shaders and filters these days, but there's something about that convex glass blob that has a special place in my heart!
Thanks again!