This chip will allow you to upgrade your Yamaha TX81Z to the v1.6 firmware OS version.

** Note before buying ** - Some TX81Z units may have the existing chip soldered in place without a socket. I recommend you follow steps 1-3 first before buying and decide if you want to attempt this upgrade. Soldered eproms will need to be de-soldered and cannot be removed with the chip puller alone. This can be a difficult process that I don't recommend if you don't have experience de-soldering/soldering chips. If needed, can include a chip socket with the sale. Message me before buying if you require a socket or if you have any questions.Install Instructions

1. Shut down your TX81Z and disconnect power

2. Carefully open the cover of your TX81Z to expose the circuit board.

3. Find the chip shown in the pictures. This is the chip you need to swap. Yours may look like the one in the pictures or it may have a sticker on it. Be sure to note the orientation of the notch on the chip.

Recommended - Take a picture first, just in case you forget!

4. ** Pull the chip straight out with the chip puller tool ensuring not to bend any pins. **

5. Install the new chip in the same slot ensuring you have the notch pointing in the same direction.

Note - You may need to carefully bend the chip legs slightly to align them with the socket holes.

6. Reinstall the cover, power up, and enjoy. Screen should say Yamaha TX81Z v1.6 03-Feb-88

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