Acom 2000A Operating Manual page 16

We recommend that before powering up the amplifier for the first time, you
familiarize yourself with the functions of the RCU in the OFF menu. The
available controls and indications seen on the RCU are similar in both the
OFF and MAIN menus.
You can proceed in one of two directions:
a) you can enter the OFF menu (see below) or:
b) you can turn on the amplifier and begin the warm-up sequence. After 2.5 minutes you will
enter the MAIN menu (see S.4-1) and may start operating the amplifier.
The OFF-menu (see also section 6) can be reached by pressing the SET/EXIT button:
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Fig.3-2 Menu Structure (see also S.10)
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