Vertex Standard FT-1000MP manual Lithium Battery Replacement, Internal 13.8V Fuse Replacement

Miscellaneous

LITHIUM BATTERY REPLACEMENT

A 3-V Type CR2032 Lithium Battery (BT5001) is located on the CNTL UNIT board (underside) of the transceiver. This maintains the memorized data in your radio. Battery life is normally greater than five years, however, should replacement be needed, perform the following steps:

With the top and bottom covers removed, note the location of the battery. Using your finger, slide the bat- tery inward (you will feel slight pressure by the mount- ing spring), then slightly pry it up and outward so that it ejects freely through the slots in the battery holder.

Carefully note battery polarity with the positive (+) side facing upward, and battery-type information. In- stall the replacement battery in the reverse manner.

MEMORY BACK-UP SWITCH

The rear panel memory BACKUP switch is normally kept in the “ON” position to ensure your memorized data is maintained (by a small amount of power from the lithium battery) when the radio is off, or the DC power source is removed.

¦If you do not plan to operate your radio for ex- tended periods of time, slide this switch to the “OFF” position to conserve battery life.

¦Ensure the radio is on when sliding the switch back to the “ON” position, as this reduces the initial current demand on the battery by the radio’s circuits from an un-powered state.

Note: Memorized settings are lost and the radio returns to factory default settings when turning off the backup battery.

CAUTION

Danger of explosion if battery is incorrectly re- placed. Replace only with the same or equivalent type.

INTERNAL 13.8V FUSE REPLACEMENT

The rear panel +13.8V jack provides regulated, separately fused 13.8 VDC at up to 200 mA, to power external low-current devices. If your device requires more current, use a separate power source. In the event the internal fuse blows, it can be replaced. However, this requires moderate transceiver disassembly.

rWith the top cover removed, locate the two screws mounting the fan assembly to the PA Unit heat sink.

rRemove the screws and move the fan assembly to one side.

rRemove the remaining four heat sink screws and lift the PA assembly from the chassis. You will need to unplug the mini coax (with the yellow band) from the RX ANT IN connector on the BPF UNIT.

rRemove the four screws from the PA Unit mount, and remove the mount to expose the BPF UNIT, and fuse labeled FH1001 (below).

rUsing a pair of fuse pullers, remove the blown fuse and replace only with a similar fast-blow type fuse (0.5A maximum).

rReassemble the PA UNIT mount, yellow-banded coax cable, PA UNIT, and fan assembly in reverse order, then replace the top cover.

page 114 MARK-V FT-1000MP Operating Manual