Audio Space GALAXY 34 Manual - page 5
5
• POWER
Plug the power cord into the power socket on the rear panel and the other end of
the cord into an electrical outlet.
(IV) POWERING ON
When you are sure the connections are correct, turn on the “POWER” switch on the
front panel of this amplifier. The “mute” LED will light up indicating the protection
delay circuit is triggered and the “VOLUME” is reset to the lowest level
automatically. After about 45 seconds, the “mute” LED will go off, indicating the
amplifier is in normal powered on mode.
The analog meter on the front panel is used to track the output signal level and
measure the bias voltage of the output tubes. Turn the “METER RANGE” knob to
either “L” or “R” to track the output signal level of the Left or Right channel.
(V) REMOTE CONTROL
The remote controller can be used to
• select the proper input source as indicated by the LEDs on the front panel,
• mute or control the volume of the amplifier,
• select Triode or Ultralinear mode of operation while the amplifier is on.
NOTE:
F
To prevent damage to circuit, never short-circuit Positive (+) and Negative (-)
speaker terminals.
F
Be sure to set the “VOLUME” control to the lowest position before turning on
or disconnecting the speakers while the unit is on.
(VI) HEADPHONE JACK
The amplifier is optionally equipped with a standard ¼ headphone jack located on the
front panel. When a headphone is inserted into the headphone jack, the SPEAKER
OUTPUT is automatically switched off.
(VII) ADJUSTING BIAS
This integrated amplifier is equipped with fixed-bias adjustment. To ensure your
amplifier is operating in its intended efficiency, it is necessary to set the bias voltage
of the output tubes to specification. In general, adjustment is needed when the system
is new or output tubes have been replaced. Once the output tubes have been burned in
(about 50 hours of use,) the bias voltage should become very stable.
Bias voltage test points and adjustment pots are marked as “+-+” and V1…V4
respectively on the top of the chassis.
The proper bias voltage is 0.3V for V1, V2, V3 and V4. Bias voltage can be measured
using the analog meter on the front panel. Use the “METER RANGE” knob on the
front panel to select the output tube (V1 to V4) for which you are adjusting the bias
voltage. With a small flathead screwdriver, turn the corresponding bias adjust pot
located on the top of the chassis until the indicator of the meter is pointing at the