E18
NAIT 5si
16 Amplifier Operation and Programmable Functions
The Nait 5si incorporates some programmable functions and operational nuances. These
are described in the following paragraphs.
16.1 Automatic Input Switching
With Automatic Input Switching engaged the appropriate
source input will be selected as soon as any handset
function for that (Naim) source component is operated. For
example, if the tuner input is selected and the cd play key
is pressed on the handset, the Nait 5si will automatically
switch to the cd input. Automatic Input Switching can be
programmed to operate on any combination of the cd,
tuner, hdd and av input buttons.
To enable Automatic Input Switching, first switch the Nait 5si
into program mode by pressing and holding the handset
prog key (with the handset in preamplifier mode). The front
panel hdd button will illuminate if automatic switching is
already enabled. If it is not enabled it can be switched on
by pressing the hdd button.
With automatic switching enabled, pressing the hdd button
again will reveal the inputs selected for auto switching
by their indicators illuminating for a short time. Repeated
operation of the hdd button will sequentially select through
each possible combination of cd, tuner, hdd and av inputs
and auto switching disabled (all indicators off). When the
desired inputs selected for auto switching are indicated,
stop pressing the button.
Automatic Input Switching only becomes operational
on exit from program mode by pressing and holding the
handset prog key.
Note: The Nait 5si will leave program mode automatically if
no control commands are received for five minutes.
Note: In a few cases some further equipment configuration
may be required for auto switching to operate correctly.
Please contact your retailer or local distributor for advice.
16.2 AV Bypass
The Nait 5si can be integrated within a multi-channel home
theatre system, driving the front left and right channel
speakers, by engaging its AV Bypass mode. AV Bypass mode
enables a home theatre processor to take over volume
control of signals connected to the Nait 5si av input.
To select AV Bypass, first switch the Nait 5si into program
mode by pressing and holding the handset prog key
(with the handset in preamplifier mode). The front panel
av button will illuminate if AV Bypass is selected. If it is not
enabled it can be switched on by pressing av button
twice.
The Nait 5si volume control indicator will extinguish when
AV Bypass mode is engaged and the av input is selected.
Remote handset volume control and mute function will
also be disabled.
Note: The AV Bypass feature must be used with care. It
bypasses the Nait 5si volume control leaving any signal
connected to the av input to be passed to the speakers at
full volume.
Note: Inserting a headphone plug while AV Bypass mode
is selected temporarily returns the Nait 5si to normal
operation. Removing the headphone plug will return the
Nait 5si to AV Bypass mode.
Note: The mute function is disabled when AV Bypass mode
is engaged.
16.3 Handset Volume Control
The remote handset volume keys provides some
alternative control characteristics. A short press and
release of a key will adjust by a preset “nudge”, while
pressing and holding the key will result in three seconds of
slow adjustment followed by continual fast adjustment.
Note: The Nait 5si does not incorporate any facility for
channel balance adjustment.
16.4 Mute
Mute silences the outputs and can be selected or
deselected by pressing the remote handset mute key.
16.5 Display
The Nait 5si front panel button illumination can be switched
off by pressing the remote handset (in preamplifier mode)
disp function. Any subsequent handset or front panel
operation will temporarily restore the display. A second
operation of the disp function will restore the display.
16.6 Remote Control
The Narcom 4 remote handset supplied with the
Nait 5si duplicates all configuration and control functions.
See Section 18 for more information.
16.7 Defaults
To restore all Nait 5si programmable settings to the factory
defaults press and hold the remote handset disp key while
the unit is in program mode. The Nait 5si will exit from
program mode following this operation.
16.8 Fault Conditions
The Nait 5si will indicate fault conditions by flashing front
panel button buttons. The following table lists the fault
indications.
Fault Flashing Button
Excess Temperature cd
Excess Current tuner
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