Maintenance; Cleaning; Fuses Replacement - Acom 03AT Operating Manual

Automatic antenna tunning unit

Table of Contents

5. MAINTENANCE

The AATU works with mains voltage 220-240VAC 50-60Hz and high DC voltage up

to 300VDC, which are LETHAL! Also, for your safety pull the AATU power plug out

of the mains wall outlet and WAIT AT LEAST 3 minutes EACH TIME BEFORE you

remove any cover!

Do not use solvents for cleaning – they may be dangerous both for you and for the

RCU paint.

Do not open the units. Cleaning of the remote unit can be done with a piece of cloth well moistened with clean water.

For the RCU surface, please use soft cotton lightly moistened with clean water.

All fuses in the AATU are European size 5x20mm and could be glass or ceramic.

a) The AC line fuse is located on the RCU rear panel, inside the mains-cord socket. In order to access it, pull out the

mains-cord power plug from the wall outlet and disconnect its second end from RCU (see fig.2-7 - the right yellow

arrow – and fig.5-1). Find a plastic tooth at the center-top of the contact opening (the right yellow arrow on fig.5-1).

Using a flat-tip screwdriver, catch the fuse lid (with a drawer inside), and pull it carefully towards outside.

Inside the drawer, you will find two fuses. One of them is bare while the second is hidden in a groove. The bare fuse

is the working one while the hidden is a spare. In case that you have no spare available, bring out the hidden one

and install it at the working place. Do not miss to supply a new spare as soon as possible.

The AC line fuse must be slow blow type (antisurge, tardy or traege), marked T or L), 0,5A/250V. It is available from

Farnell, cat.nr. 898-892.

When installing, orient the plastic drawer with the tooth down, align it to the body groove in the socket and push it

carefully inside against stop (its lid should flush with the socket frame). Then insert the power cord first in the RCU

mains socket and make sure that the main switch POWER located on the rear panel is in OFF position (so that the

red stripe on the switch is hidden). At last, connect the power plug of the RCU to the wall mains outlet.

W A R N I N G HIGH VOLTAGE!

Use only standard fuses of the types shown below for replacement.

Fig. 5-1 Pulling out the AC line fuse.

C A U T I O N

Table of Contents