PAL Mega CD 2, odd chip

I received a model II mega CD as payment for fixing a dreamcast for somebody, it all seems to run fine.
Just for the sake of curiosity, I decided to crack it open and have a look and on the motherboard. I then spotted this.


Is it anything interesting? because it doesn't look very stock

 

Don't remember seeing this in mine, http://am.renesas.com/products/standard_ic/logic/rd74hc/device/HD74HC74P.jsp looks like a chip for the CD player to register lid opening/closing?

 

didn't someone post about this last week??? yes it's a standard part, mine has one too.

 

Same. Had to replace the fuse in my Sega CD II and i seen the same board. Long story short its manufacturer done.

 

Ok Fair enough! Just thought the soldering looked a bit amateur to be factory done is all!

 

Yes it is in early model 2's (from memory the service manual makes reference to it).

 

D flip-flip and a NOT gate. Nothing major but without knowing what they connect to I've got no idea what they're for.

 

I posted a picture of this too a while back. From what I was told it fixes a bug in one of the ASIC chips. Not sure what or how though.

 

Is connected to PCM sound chip.