Furuno RP-25 manual Replacement of Battery on RP Board, Do not open the equipment

3. MAINTENANCE (FOR TECHNICIANS)

3.2Replacement of Battery on RP Board

The RP Board is mounted in the display unit of the FR-2805 series radars. For general maintenance and trouble shooting, therefore, refer to radar’s operator’s manual. The only maintenance required for the RP-25 is the replacement of the battery on the RP-Board.

A lithium battery on the RP Board preserves RP-25 data when power is off. The life of the battery is about three years. When the radar self-test shows low battery voltage, have the battery replaced at your earliest convenience, so that important data will not be lost.

Before replacing the battery, save data to a RAM card, if necessary.

DANGER

Do not open the equipment.

High voltage which can shock, burn or cause death exists inside the equipment. Do not work inside the equipment unless familiar with electrical circuits.

Turn off the power at the mains switchboard before begining the installation.

Post a sign near the switch to indicate it should not be turned on while the equipment is being installed.

Fire, electrical shock or serious injury can result if the power is left on or is applied while the equipment is being installed.

CAUTION

Be sure the battery is inserted "plus" side

up to prevent damage to card and equipment.

JP1

Lithium battery

Name	Type	Code No.
Lithium battery	ER3S	000-127-759

1.Turn the radar off, and then dismount the RP Board from the display unit. Lay the board on insulating materials.

2.Cut jumper wire JP1. This cuts off the battery circuit.

3.Replace battery.

4.Attach jumper wire JP1.

5.Remount the RP Board to the display unit.

3-2