PCEngineFans.com - The PC Engine and TurboGrafx-16 Community Forum

NEC TG-16/TE/TurboDuo => TG/PCE Repair/Mod Discussion => Topic started by: cornacchia on April 02, 2011, 10:03:38 AM

Title: Core Grafx II question
Post by: cornacchia on April 02, 2011, 10:03:38 AM

So I recently got me a Core Grafx II  :D But when I opened it up the metal plate on the bottom was pretty rusty.  The system works fine and there is no damage to the board.  I was wondering if that plate was necessary, and if I could just remove it without any heat issues. Any replies are appreciated.

Title: Re: Core Grafx II question
Post by: gtsamour on April 03, 2011, 04:38:41 AM

The metal plate protects the system from electromagnetic interference, something like a faraday cage.

Title: Re: Core Grafx II question
Post by: BlueBMW on April 03, 2011, 05:14:37 AM

Also, there is a metal piece attached to the voltage regulator that acts as a heatsink for it.  Do not remove that or the voltage regulator will probably burn up and fail.

Title: Re: Core Grafx II question
Post by: cornacchia on April 03, 2011, 11:53:42 AM

Its definitely not the heatsink.  It covers the bottom of the board, not soldered on or anything. My white pc engine doesn't have one so im not sure if its necessary.  I could take pictures later when I get home.  I just don't want the rust to spread to the board.  There was a little corrosion on the board but I cleaned it up and everything works fine.

Title: Re: Core Grafx II question
Post by: BlueBMW on April 03, 2011, 12:27:07 PM

Its mostly for interference shielding.  I know on turbo expresses I have to remove such shielding to replace the capacitors.  I have noticed no ill effects from doing so.  Might not comply with FCC regulations afterwards but... :P

Title: Re: Core Grafx II question
Post by: gtsamour on April 03, 2011, 09:46:51 PM

why dont you just remove the rust with some abrassive paper, make it clean and shiny again and keep it in place? It may not be soldered on anything but when the system is assembled and closed, it touches the board's ground.

Title: Re: Core Grafx II question
Post by: cornacchia on April 04, 2011, 01:38:47 AM

Quote from: gtsamour on April 03, 2011, 09:46:51 PM

why dont you just remove the rust with some abrassive paper, make it clean and shiny again and keep it in place? It may not be soldered on anything but when the system is assembled and closed, it touches the board's ground.

That is what I ended up doing  :D  It took longer then I thought, there was more rust than it seemed...  Oh well, everything is in working order now.