PHONO CARD ADjUSTMENTS
If the Phono Card option has been factory
installed, so that Input 2 on the rear of the
CONCERTO is dedicated for phono operation
only, the following adjustments can be made
to optimize the performance of a particular
phono cartridge. These adjustments include
both cartridge loading and overall phono
amp lifier gain.
STEP 1: Unplug the CONCERTO power cable
from the wall AC outlet.
STEP 2: Place the unit upside-down on a soft,
clean surface. Using a #2 Phillips screwdriver,
remove the twelve screws that secure the
bottom cover of the unit.
STEP 3:
Carefully remove the phono card
from the back panel by easing it gently back
and forth until it separates from the unit. (See
FIGURES 8 and 9)
FIGURE 8: Location of Phono Cards on the inside back panel FIGURE 9: Phono Card removal
FIGURE 10: Detail of Phono Card PCB default settings
(LOAD-400 ohms, 1-OFF, 2-ON) (GAIN-62 dB, 1-OFF, 2-ON)
1 2
LOAD
1 2
GAIN
STEP 4: Locate the LOAD and GAIN switches
on the phono card. (See FIGURE 10)
Adjust
the Load Resistance and Gain settings on the
plug-in Phono Card as shown in the tables in
FIGURES 11 and 12.
STEP 5: Replace the bottom cover.
Using a
#2 Phillips screwdriver, reinstall
the twelve
screws that secure the bottom cover.
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