INSTALLATION INSTRUCTIONS FOR THE DIGITAL II
(MARK IV INSTRUCTIONS AVAILABLE SOON)
DIGITAL II INSTALLATION INSTRUCTIONS
The Digital II Chime Model was designed for use on 12-Volt Negative Ground electrical systems only. Do not connect it to positive ground systems because the unit will not operate. Most of the American made (and foreign) cars and trucks built since 1956 have negative ground systems, but if in doubt, check with your dealer.
Use the mounting brackets on the case to secure the chime to any handy mount-
ing position under the dash or on the firewall. The mounting brackets can be reversed if desired by removing the case from the chime and replacing it in an inverted position. The mounting screws will effectively ground the chime when screwed into any metal surface of the vehicle that is connected to the vehicle chassis. However if the chime is to be mounted to a non-metallic surface or temporarily installed, such as in a glove box, it is then necessary to run a jumper Wire from the case of the chime unit to a suitable ground. The ground can be any metal part of the vehicle that contacts the chassis.
Connect the electrical lead wire (red wire) from the chime to any 12-volt positive source. This can be to a fuse block, ignition switch or a wire coming from the
Positive (red) post of the battery.
Any 8 or 4 ohm horn type, public address speaker can be used with the Digital II model. However if 2 speakers are to be connected to the chime unit in parallel, they should both be of 8 ohm's impedance, as the total load should not be less than 4 ohms. Mount the speaker in any convenient location. Use ordinary household lamp cord to extend the speaker wires if necessary. It is good policy to solder all connections, but solderless connectors (wire nuts) may be used if properly secured. Plug the speaker wire into the jack located on the rear of the chime. The chime is now ready to operate, turn on the power switch and set the volume control to the desired level.
The Digital II Model generates music by electronic synthesis and the unit is designed to be virtually maintenance free. Consequently it contains no moving or user serviceable parts within. Like all electronic equipment it is sensitive to moisture. Special care must be taken when washing the vehicle to ensure that water does not enter the chime unit.