TOSLINK (optical audio output)

Note: Portions of this page were resurrected by the WayBack Machine Internet Archive. Real handy if a website you once visited has now been removed or moved without any forwarding address. My apologies to "Tarzan" if this page does still exist but I could not find it so I have reconstructed it here because it does offer a nice feature on the AD-600A for those who want it.

The original Tarzan pictures and instructions presented here use a SHARP GP1F32T transmitter unit but also mentions the ability to use a Toshiba unit with minor wire link modifications on the circuit board. I am sure there are many other manufacturer's devices that could be used too if you compare the specs and make sure it is compatible.

Above is a shot of the un-modified rear A/V board in an AD-600A. CN1 is where the TOSLINK module goes. Also circled is JS1 and JS2 jumpers and resistor R75. JT1 and JT2 jumpers are for Toshiba modules (and possibly others) because they have reversed pins. This example uses the SHARP GP1F32T, so jumpers JS1 and JS2 are used. R75 is a 330 ohm resistor, which is used to limit the current to the LED (light emitting diode) inside the TOSLINK. The side of R75 that does not go to the TOSLINK is where the digital feed comes from the main processor/decoder board. There is a place for a capacitor at C14 just below the TOSLINK module. The SHARP GP1F32T works fine without it so other modules should too. If you are having problems decoding audio with your HiFi one may have to be added. Try values in the range of 0.001uf to 0.1uf if in doubt.

Here you can see the installed TOSLINK module, the two wire links and the resistor at R75 location. The only other thing that needs to be done is cut a small square hole in the rear of the case to allow access to the TOSLINK connector. As a guide, cut out a hole in the back by drilling a 1/4 inch hole and filing it to a square shape.

Of course, to use TOSLINK you will have to go into your audio output settings menu and change it for the digital output setting that matches your reciever (HiFi).