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24
Figure 18
Tubes LED will be illuminated with the Amber
Color. Then sound will be heard and the LED
illumination color of the Small Signal Vacuum
Tubes will change to the Green Color.
Source Selection
Rotate the INPUT Control to select the desired source
or press the → Input Push-button on the Remote Con-
trol. Refer to figures 51 and 54.
Volume Control
Rotate the Front Panel VOLUME Control or use the
+ or - Push-buttons on the Remote Control for
the desired listening level. Refer to
figures 51 and 54.
Trim Functions
The MA252 has various Trim Selec-
tions with Adjustments. The Trim
Functions include Balance, Input
Trim Level, Tone Controls, Bass, Tre-
ble and Display. The Trim Settings
are stored in memory independently
for each Input Source Selected.
Note: Selection and Adjustment of all
Trim Functions may be per-
formed by pressing the Front
Panel INPUT Trim Control and
Power On and Off
The Red LED to the left of the VOLUME Control
lights to indicate the MA252 is in Standby mode. To
switch ON the MA252, Press the VOLUME Control
on the Front Panel or press the Push-button on the
Remote Control. The MA252 will go through a Tube
Warmup Initialization procedure. Refer to figure 50.
This is followed by the Front Panel Display indicating
the last used source and the volume setting indication
starting at zero and then increasing to the last used
volume setting. Refer to figures 51, 52 and 53. To
switch OFF the MA252, press the VOLUME Control
on the Front Panel or press the Power Push-button
on the Remote Control.
Notes: 1. For an explanation of the Remote Control Push-
button functions, refer to pages 16 and 17.
2. During the Tube Warm-Up period of time no
sound will be heard. The Small Signal Vacuum
then rotating it to select
the desired Trim Function.
Then use the VOLUME Ad-
just Control to change the
setting. The Remote Con-
trol TRIM Push-Button
together together with the
Directional Push-buttons
can also be used to select a
TRIM Function and make
Trim settings. Refer to
figures 51 and 54.
After approximately 5 seconds
the Display returns to indicate
the Source Selection and Vol-
ume Level.
BALANCE
Listening balance varies with
different program sources, room
acoustics and listening positions
relative to the Loudspeakers.
Use the Balance (Trim Function)
as needed to achieve approxi-
mately equal listening volume
levels in each Loudspeaker. To
adjust the Balance perform the
following:
1. Press the TRIM Push-button
repeatedly on the Remote Control until “L BAL-
ANCE R, || ” appears on the Front Panel Display.
Refer to figure 55.
Note: The Front Panel INPUT/Trim Control may also
be used.
How to Operate the MA252
Figure 55
L BALANCE R
||
Figure 51
UNBAL 1 15%
INPUT
HEADPHONES
PUS H - TRIM
VOLUME
PUSH - POWER
STANDBY
Figure 52
UNBAL 1 15%
Figure 53
PHONO 30%
Figure 54
Figure 50
MA252
Tube Warmup
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