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meters. There are two trim pots; one for Channel A (left) and one for Channel B
(right). This dual adjustment configuration aids in the calibration of the meters
with the input gain.
Adjustment is between -10dBu and +10dBu (nominal). Gain increases as the
pots are turned clock-wise. These controls may be accessed with a small flat-blade
screwdriver.
Note: Do not force the trim pots past their stop points as this will damage the
unit.
RCA Connectors for Unbalanced Inputs on Channels A and B
These inputs are meant to receive standard, unbalanced, -10 dBu line level audio
signals. Both are configured for an unbalanced, high impedance connection.
Panel-mounted female RCA connectors are used.
VOL/BAL TO A-VOL/B-VOL RETROFIT INSTRUCTIONS
The AMS-1027 is configured at the factory with Volume/Balance controls. To
change the function of the Volume/Balance controls on the front panel to an “A”
Volume/“B” Volume (left and right) configuration, follow the instructions
below:
1. Disconnect the unit from AC and all line connections.
2. Remove the AMS-1027’s top cover.
3. Locate the Vol/Bal harness (flat cable) running from the right-side front panel
PCB (See Figure 1-5).
4. On the Main PCB, unplug the harness ribbon cable connector from J18 and
plug it into J16 (See Figure 1-6).
5. Replace the AMS-1027’s top cover and reconnect.
Remember that the front panel text will still refer to the right-side control as a
balance. You may want to place a label over the old text of both knobs to indicate
their new function as “A” and “B” (or Left and Right) volume controls.
D
You can reconfigure the unit
to give it two separate
volume controls. Instructions
are included in this chapter.