35
Fig. 7-9 CAT Connection to YAESU FT-897
8. MAINTENANCE
W A R N I N G HIGH VOLTAGE!
The amplier works with high voltages up to 3000V which are LETHAL!
For your safety, pull the amplier power plug out of the mains wall outlet
and WAIT AT LEAST 30 minutes EACH TIME BEFORE you remove the
cover of the amplier. Do not touch any part inside while the amplier
is open as some residual voltages may still be present.
8-1. Cleaning
W A R N I N G
Do not use solvents for cleaning - they may be dangerous both for you
and for the amplier paint.
Do not open the amplier. Cleaning of the amplier and RCU outer surfaces can be done with
a piece of soft cotton cloth lightly moistened with clean water.
8-2. Backup Battery Replacement
If the RCU displays a message: LOW BATTERY-DATA IS IN DANGER or LOSS OF STORED
DATA-CHECK BATTERY PLEASE, it is necessary that the nonvolatile memory battery for
USR-TUNINGS be replaced. This is a 3V/38mAh "coin - type" lithium battery with a diameter
of 12mm (~1/2inch) with leads for soldering. The following types are suitable:
- BR1225T2-1 made by RAYOVAC USA
- BR1225-1HC made by PANASONIC
This is a complex and possibly dangerous operation. For this reason, Acom recommends that
this work be carried out by a trained service technician. See the TECHNICAL SUPPLEMENT
for details. The expected life of a new battery is at least 5 years.
8-3. Fuse Replacement
If circumstances require replacement of the mains fuses, use only standard ones.
They are 20A/250V Quick blow, 1-1/4 x 1/4 inch Cartridge Fuses, Size "0" Ceramic.
Besides these primary fuses, there are six small glass fuses (5x20mm) on the MAINS CONTROL
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