AMERICAN LASER GAMES - AUDIO THROUGH TELEVISION HACK - October 1, 2010
Written and developed by Shaun Wood

INTRODUCTION

If you are like me, you have an ALG system without the cabinet, or maybe you are building one.  The advantage of this is that it can be portable.  All of the electronics can be mounted on a single board and carried to any convenient TV.  (It must be a CRT type; flat panels won't work.)  One of the problems though, is that there is no line level audio output to connect to the TV sound input system.  You must use the TAOS board audio amplifier and bring your own speakers.  This document will show you how to add a line level audio out to connect to a TV or other audio amplifier.

PARTS NEEDED

PROCEDURE

From the TAOS board, remove the speakers (J104) and the volume controls (J106) connectors.

Cut off the plugs from one end of your stereo patch cable, and strip the wires as shown in figure A.

Re-use one of the connectors removed from J104 or J106 and connect to the patch wire as shown in figure B.
Connect the white wire to pin 1, common/ground to pin 3, and red to pin 5.
Optionally, you can order the part numbers above if you don't want to damage volume control or speaker cables.

Attach your new patch cable to the TOAS board at J106 as shown in figure C, and connect the RCA plugs to your TV audio inputs.

That's it!  You can now adjust the volume using the TV controls.  Enjoy!

(Click on the images for a larger view)

ALG Audio hack figure A
Figure A

ALG Audio hack figure B
Figure B

ALG Audio hack figure C
Figure C

DISCLAIMER

I hate the disclaimer part.  Well, here it goes.  If you aren't up to this project, don't do it.   If you do, then you accept full responsibility for the results.  That's about it.  Have fun!


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