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Need Advice On How to Repair Genesis 2
Robot_House - May 9, 2006
  Robot_House May 9, 2006
Hello again. I had posted a couple of topics a while back about my malfunctioning sega cd. With your forum's advice, I was able to repair the system. Thank you for the help. Because of the good information I had recieved before, I hope someone can help me with this latest problem.

Two days ago, I had recieved a 32x, sega cd, and genesis 2 from EBay. After repairing the sega cd and 32x, I had begun to start my efforts on the Genesis 2. Everything seems to work fine except that the system seems to not be recieving any signals from my controllers. I had checked the leads on the motherboard, which appear to be fine. Can anyone help me with this? Thank you for your time.

 cgfm2 May 12, 2006

  
	
	

		
		

			Originally posted by Robot_House@Tue, 2006-05-09 @ 07:15 PM



Hello again. I had posted a couple of topics a while back about my malfunctioning sega cd. With your forum's advice, I was able to repair the system. Thank you for the help. Because of the good information I had recieved before, I hope someone can help me with this latest problem.



Two days ago, I had recieved a 32x, sega cd, and genesis 2 from EBay. After repairing the sega cd and 32x, I had begun to start my efforts on the Genesis 2. Everything seems to work fine except that the system seems to not be recieving any signals from my controllers. I had checked the leads on the motherboard, which appear to be fine. Can anyone help me with this? Thank you for your time.




[post=146180]Quoted post[/post]


Both controller ports are bad? Do you have any spare known-working controllers to test with?

Take a look at the underside of the PCB where the joystick connector pins are. The solder may be broken around one or more pins. Use a soldering iron to reflow the solder so a good connection is made. (might as well touch up the A/V connector and power connector while you are at it

I'd use a multimeter and verify that joystick port pin 5 is +5V and pin 9 is ground, using a known good test point (e.g. the 7805) for reference. Genesis pads won't work without +5V present, or if the ground reference is screwed up the inputs may not be valid.

I'm not too familiar with the Genesis 2, but I can't think of much else that would cause this problem. The chip that handles the inputs does a lot of other functions too, so if it was broken the system probably wouldn't work at all.