Dolby AC-3 Output Modification of Sony LDP1550

Schematic showing Dolby AC-3 output buffer circuit, and connection points on LDP1550 VP-20 (audio) board
(click image to see full size version)
 
LDP1550 Dolby AC-3 output circuit

Drawing showing the use of an existing, unused 14pin DIP pattern on the VP-20 board to build the output buffer circuit
(click image to see full size version)

Use of unused 14 pin DIP in VP20 PCB etch


Picture of VP-20 PC board, solder side, showing where the spare 14pin DIP pattern is located, and where the wires hook to. I used 30 gauge kynar wirewrap wire on the solder side of the board. (click image to see full size version)
Overview of connections on VP-20 board
 


Thanks to Kevin Nakano for providing useful information regarding Dolby AC-3 modification on his site   (page is long gone, but archived at web.archive.org)