Difference between revisions of "Sega Genesis II Teardown"

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(Created page with " The second hardware revision of the Sega Genesis (or Mega Drive if you're outside the US) is by far one of the easiest consoles to take apart, it's essentially four laye...")
 
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==The Mainboard==
 
==The Mainboard==
 
Once the upper heat shield has been removed the top of [[File:IMG_1479.jpg|thumb|300px]]the system mainboard will be exposed, this is where all the consoles working components are. The vast majority of Genesis II repairs and mods will involve soldering something to the mainboard. To remove the mainboard form the console base undo the two large screws on either side of the cartridge connector, and carefully lift it straight off. If you left the "DO NOT REMOVE" sleeve on form earlier you can use it as a grip to hold the board easier without risking damage.
 
Once the upper heat shield has been removed the top of [[File:IMG_1479.jpg|thumb|300px]]the system mainboard will be exposed, this is where all the consoles working components are. The vast majority of Genesis II repairs and mods will involve soldering something to the mainboard. To remove the mainboard form the console base undo the two large screws on either side of the cartridge connector, and carefully lift it straight off. If you left the "DO NOT REMOVE" sleeve on form earlier you can use it as a grip to hold the board easier without risking damage.
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[[File:IMG_1480.jpg|thumb|left|300px|Mianboard Top]][[File:IMG_1481.jpg|thumb|300px|Mainboard Bottom]]
 
[[File:IMG_1480.jpg|thumb|left|300px|Mianboard Top]][[File:IMG_1481.jpg|thumb|300px|Mainboard Bottom]]
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[[File:IMG_1484.jpg|thumb|300px|The lower heat shield and cartridge support]][[File:IMG_1483.jpg|thumb|left|300px|The empty console base]]
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[[File:IMG_1484.jpg|thumb|300px|The lower heat shield and cartridge support]]
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[[File:IMG_1483.jpg|thumb|left|300px|The empty console base]]
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==Reassembly==
 
==Reassembly==
 
To reassemble the system, just follow these same steps in reverse order, here are some things to remember:
 
To reassemble the system, just follow these same steps in reverse order, here are some things to remember:
*Do NOT let any screws get between the lowerH2 { margin-bottom: 0.08in; }H2.ctl { font-family: "Lohit Hindi"; }P { margin-bottom: 0.08in; }A:link { }Cartridge heat shield and the mainboardH2 { margin-bottom: 0.08in; }H2.ctl { font-family: "Lohit Hindi"; }P { margin-bottom: 0.08in; }A:link { }
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*Do NOT let any screws get between the lower heat shield and the mainboard
 
*Make sure to put the cartridge support back in place before screwing the mainboard to the base
 
*Make sure to put the cartridge support back in place before screwing the mainboard to the base
 
*Check that the heat shields are oriented correctly before trying to tighten them down
 
*Check that the heat shields are oriented correctly before trying to tighten them down
 
*The screws used for the upper heat shield and the cartridge door are identical, it doesn't matter if you get them mixed up
 
*The screws used for the upper heat shield and the cartridge door are identical, it doesn't matter if you get them mixed up
 
*Be careful not to put screws in too tightly or you can damage the plastic threading
 
*Be careful not to put screws in too tightly or you can damage the plastic threading

Revision as of 08:45, 24 November 2013


The second hardware revision of the Sega Genesis (or Mega Drive if you're outside the US) is by far one of the easiest consoles to take apart, it's essentially four layers of plastic and stamped metal with a static mainboard sandwiched in-between. The Genesis used in this guide had already been taken apart 5+ times for various cleaning and repairs and still works like new.

Nevertheless, this guide will walk you step-by-step through a complete teardown of the Sega Genesis/Mega Drive II

Preparation

Genesis II ready for disassembly
File:IMG 1488.jpg
A properly prepared work area

Begin by preparing a flat, clean surface to work on, and disconnect any controllers, games, cables and add-ons that are connected to your console. The only supplies you will need besides the console itself are a standard Phillips-head screwdriver and (optionally) something to contain your screws. If your Genesis was recently plugged in to power, it's a good Idea to turn the power on wile the system is unplugged, and let it sit for a few minutes to drain the capacitors before starting. This will greatly reduce the risk of an electrical discharge that could lead to shock or damage to the console.




Getting Inside

Turn the console over to expose the underside. Remove

the plastic cover concealing the expansion slot as shown on the left, and set it aside. You can also remove the red "DO NOT REMOVE" sleeve on the connector itself if you like, although doing so will leave the connector pins more susceptible to damage during the remainder of the disassembly.




Next you will need to remove the four highlighted screws on

IMG 1474.jpg

each corner of the console base. They are a bit tight at first, but should come loose with minimal effort. It may be necessary to turn the console back over and gently tap the it to get the screws to come all the way out of their holes. Once the screws are out, the top cover should lift straight up from the base.



The Cartridge Bay Door

Set the base of the console aside and turn over the top plastic cover. Undo the three bronze-colored screws highlighted in the picture below, and lift off the spring-loaded door assembly that protects the cartridge slot

.







Set both pieces aside and continue to the next step.

The Upper Heat Shield

Returning to the base of the console, you will now need to

IMG 1476.jpg

remove the upper heat shield to gain full access to the system mainboard. Remove all nine screws highlighted in the images on the left, and lift the heat shield straight up from the base. Be sure that ALL the screws are removed before attempting to lift off the heat shield as it's made of cheap stamped sheet metal that has a tendency to bend.








The Mainboard

Once the upper heat shield has been removed the top of

the system mainboard will be exposed, this is where all the consoles working components are. The vast majority of Genesis II repairs and mods will involve soldering something to the mainboard. To remove the mainboard form the console base undo the two large screws on either side of the cartridge connector, and carefully lift it straight off. If you left the "DO NOT REMOVE" sleeve on form earlier you can use it as a grip to hold the board easier without risking damage.





File:IMG 1480.jpg
Mianboard Top
Mainboard Bottom









The Console Base

As one final step, you can remove the plastic cartridge support and lower heat shiled form the base of the console,as all the screws holding them in place have been removed.


File:IMG 1484.jpg
The lower heat shield and cartridge support
File:IMG 1483.jpg
The empty console base









Reassembly

To reassemble the system, just follow these same steps in reverse order, here are some things to remember:

  • Do NOT let any screws get between the lower heat shield and the mainboard
  • Make sure to put the cartridge support back in place before screwing the mainboard to the base
  • Check that the heat shields are oriented correctly before trying to tighten them down
  • The screws used for the upper heat shield and the cartridge door are identical, it doesn't matter if you get them mixed up
  • Be careful not to put screws in too tightly or you can damage the plastic threading