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Old 10 December 2010, 12:58   #1
PowerPie5000
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Wrinkles in PCB

I looked through the underside vents on my old C64 and noticed the green motherboard looks "wrinkly" ... Is this normal? I also noticed this with my old Amstrad CPC. The PCB looks kind of creased and wrinkled in the green area's (coatng?).

Is this anything to worry about and what causes this to happen

Cheers
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Old 10 December 2010, 13:18   #2
orange
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I noticed that on ZX Spectrums too, but wouldn't worry about it if it works..
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Old 10 December 2010, 15:14   #3
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Quote:
Originally Posted by PowerPie5000 View Post
I looked through the underside vents on my old C64 and noticed the green motherboard looks "wrinkly" ...
One of mine is too. I've also seen this on an early 80s Pong type TV game I had. I suspect it's because they were made on the cheap
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Old 10 December 2010, 15:28   #4
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age, ask your grandfather
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Old 10 December 2010, 15:54   #5
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age, ask your grandfather
I'm thinking it's age related too

Well the C64 works perfectly anyway but was just curious about the quality of the PCB
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Old 10 December 2010, 16:24   #6
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Without seeing a picture of it I can't be sure, but it sounds like excess solder on the traces from the solder flow machine. I've seen this many times before, it's not a problem. I think it's cool looking.
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Old 10 December 2010, 21:45   #7
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Alot of the boards looked like that, its just how they were made.

Later,
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Old 10 December 2010, 23:18   #8
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Yep, most breadbox boards are very wrinkly on the solder side. Just crap quality, that's all.
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Old 10 December 2010, 23:37   #9
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I smear my Amiga 500 motherboard in Oil of Olay to bring out the wrinkles...
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Old 11 December 2010, 02:10   #10
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Quote:
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Alot of the boards looked like that, its just how they were made.
Quote:
Originally Posted by Jope View Post
Yep, most breadbox boards are very wrinkly on the solder side. Just crap quality, that's all.
So it's nothing to worry about then... thats a relief

Anyway it works perfectly and i've had a a nice long gaming session on it today. The volume is quite loud compared to my other systems using the same TV... Ye olde SID 6851 chip sounds great

I've seen a few different style C64 PSU's and would like to know which one is the best/most reliable to use? My C64 is using the original "wedge" shaped PSU and there is a faint humming/buzzing noise coming from it. It also gets fairly hot after a while.
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Old 11 December 2010, 15:21   #11
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I've seen a few different style C64 PSU's and would like to know which one is the best/most reliable to use? My C64 is using the original "wedge" shaped PSU and there is a faint humming/buzzing noise coming from it. It also gets fairly hot after a while.
I'd say the most reliable one is the rectangular ribbed one.



The one in the middle. Haven't seen any of the right hand side style break yet either.

The wedge style seems to lose 9VAC as a type fault.
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