NAIM NAC 112 - ISSUE 2 Manual - page 5
4
6.1 source inputs and record outputs
The input selector buttons arranged along the uppermost
bank select the source signal to be routed to the power
amplifier and the loudspeakers. Below them, in the lower
bank, are a corresponding array of buttons which select the
signal to be routed to the preamplifier’s record outputs.
These separate source and record sections enable one
source (a CD player, for example) to be listened to whilst
the output from another (say, the tuner) is simultaneously
selected for recording.
Note:
It is possible to lock the
record controls and prevent accidental de-selection during
recording. Record-lock is switched on or off by depressing
the source mono button four times within six seconds.
Illuminating indicators are fitted to the NAC 552 rear panel
above each input socket. These indicators illuminate to
provide information on input selection and on input
mapping setup and programming.
6.2 input mapping
Any NAC 552 source input socket can be selected by any
button. For example, while the NAC 552 default setup is for
the CD input button to select input socket No. 2, custom
programming of “input mapping” could enable any input
socket to be selected by pressing the CD button. Mapping
of each record button follows the corresponding source
button.
Input mapping setup is accessed through the NAC 552
program mode. To switch into program mode press and
NAC 552
6 Installation and Operation
The NAC 552 preamplifier does not incorporate an internal power supply and can be
used only in conjunction with the NAC 552PS power supply. Diagram 7.3 illustrates
connection of the NAC 552 to its power supply.
The four transit screws on the underside of the NAC 552 case should be removed before
use and must be replaced if the unit is to be re-packed and shipped. These transit
screws must not be used in any other Naim product. Do not invert the NAC 552 once the
transit screws are removed.
hold
prog
from the remote handset (in preamplifier mode).
Program mode is indicated by a flashing indicator on the
volume control and the record select indicators
extinguishing. If no function is operated within five minutes
of entering program mode the NAC 552 will return to
normal mode automatically.
Any of the six source buttons on the front panel can be
mapped to any of the nine stereo inputs (seven DIN
sockets and two phono socket pairs) on the rear panel. In
program mode, as a source input is selected, a rear panel
indicator will illuminate to designate the socket to which it
is mapped.
To change the input socket mapped to a source button,
select the source button and use the front panel
record
mute
and
mono
buttons to scroll along the input sockets.
If the input socket selected is already mapped to a source
button the indicator above the socket will flash repeatedly.
It is possible to map one input socket to more than one
source button but NOT to map multiple input sockets to
one source button. The remote handset record mute and
mono functions can also be used to set up input mapping.
6.4 automatic input switching
The NAC 552 incorporates an optional automatic input
switching feature which can select the appropriate input as
soon as any handset function for a particular Naim source
component is operated. For example, if the tuner input is
selected on the NAC 552 and the CD
play
key is operated
on the handset, the NAC 552 will automatically switch to
the CD input. Automatic
input switching can be
programmed to operate
independently on any
combination of the CD, AV
and Tuner input buttons (and
sockets to which they are
mapped).
To enable automatic input
switching, first switch the
NAC 552 into program mode
6.3 socket types and mapping defaults
Input Socket
Socket
Source Button
Number
Features
Mapping Default
1
DIN input
Not Mapped
2
DIN input
CD
3
DIN input
TUNER
4
DIN input/output, unity gain capable
TAPE
5
DIN input/output, unity gain capable
AV
6
DIN input/output
AUX 1
7
DIN input, power output for Stageline
AUX 2
8
Phono pair
Not mapped
9
Phono pair
Not mapped