Yamaha PSR-78 Owner's Manual - Page 4

Setting Up This section contains information about setting up your PortaTone for playing. Make sure to read this section carefully before using the instrument. Power Requirements Your PortaTone can run either on batteries (sold separately) or on normal household current by using the optional Yamaha PA-3/3B Power Adaptor (or another adaptor specifically recommended by Yamaha). Using an AC Power Adaptor To connect your PortaTone to a wall socket, you will need the optionally available Yamaha PA-3/3B Power Adaptor. Use of other AC adaptors could result in damage to the instrument, so be sure to ask for the right kind. Plug the adaptor into a convenient wall outlet and its connector into the DC IN 10-12V jack on the back of your PortaTone. DC IN 10-12V Using Batteries ˙ Inserting Batteries Turn the instrument upside-down and remove the battery compartment lid. Insert six 1.5-volt size "D" batteries as shown in the illustration, making sure that the positive and negative terminals are properly aligned, and replace the lid. ˙ When the Batteries Run Down When the batteries run low and the battery voltage drops below a certain level, the PortaTone may not sound or function properly or may be reset to the default status. As soon as this happens, replace them with a complete set of six new batteries. Never mix old and new batteries or different types of batteries (e.g., alkaline and manganese). To prevent possible damage from battery leakage, remove the batteries from the instrument if it is not to be used for an extended period of time. Accessory Jack ˙ Using Headphones For private practicing and playing without disturbing others, connect a set of stereo headphones to the rear panel PHONES /AUX OUT jack. Sound from the built-in speaker system is automatically cut off when you insert a headphone plug into this jack. PHONES / AUX OUT ˙ Connecting a Keyboard Amplifier or Stereo System Though the PortaTone is equipped with a built-in speaker system, you can also play it through an external amplifier/speaker system. First, make sure the PortaTone and any external devices are turned off, then connect one end of a stereo audio cable to the LINE IN or AUX IN jack(s) of the other device and the other end to the rear panel PHONES/AUX OUT jack on the PortaTone. Music Stand Insert the bottom edge of the included music stand into the slot located at the top rear of the PortaTone control panel. 2