My Genesis 2 has a Sony CXA1145M video encoder instead of the Samsung encoder (lucky me). I've built the buffers as per this instructions that a lot of sites refer to:
http://www.gamesx.com/wiki/doku.php?..._1_s-video_mod
I also found some information on this thread:
http://www.digitpress.com/forum/showthread.php?t=82298
I'm using 100K + 10K resistors instead of a single 110K resistor, a C1815 instead of the NTE85, and a 68 ohm resistor on the C output since I couln'd find a 75 ohm resistor, but as far as I can tell, it shouldn't matter.
The bad thing is that I'm not getting any signal on the TV. I then thought that maybe the "M " after the CXA1145 might have something to do with it, but it's just a smaller revision with the same capabilities as the regular CXA1145.
I have tried:
- testing the buffers for shorts,
- connecting Gnd to the heatsink instead of the G pin on the regulator,
- connecting the buffer Gnd to the regulator's G pin and the S-Video Gnd to the heatsink,
- the inverse of the above,
- switching the Pin 16 and 15 connections to the buffer board, just in case I got them reversed somehow,
- connecting the shield of the S-Video jack to Gnd,
- making another set of buffers with the 2N3904 instead of the C1815.
Am I missing something? Why am I getting no signal on the TV?
Pictures:
CXA1145M in Genesis 2 (board revision PC BD MD2 VA1 USA):
The circuit I'm using: