Information subject to change
96-8005549_3-18-21
8508 OPERATOR’S MANUAL – SECTION 4
12
4
Amplifier Operation
4.1 Front-Panel Controls and Indicators
This section provides an overview of Front-Panel
controls and indicators found on the 8500 series
amplifier. Refer fo
Figure 4.1
for component loca-
tions.
4.1.1 Power Switch
The Power switch controls the power to the am-
plifier’s high-voltage transformers. Switch to the
ON position (|) to energize the amplifier. Switch to
the OFF position to remove power from the high-
voltage transformers and place the amplifier in
Standby mode.
4.1.2 Run/Standby Indicator
Run mode:
The indicator will be lit solid green.
The amplifier’s high-voltage transformers are ener-
gized and the unit will amplify the input signal.
Standby mode:
The indicator will be lit solid am
-
ber. The amplifier will be placed in Standby when
one of the following conditions occurs:
Figure 4.1 – Front Panel Controls and Indicators
1.
High/Low Line error
2.
Overtemp condition
3. Fault condition
4.
The user presses the front-panel power switch
to the OFF (O) position.
In Standby mode, the amplifier’s low-voltage trans-
former is energized but the high-voltage transform-
ers are not.
To release the amplifier from Standby mode:
1.
High/Low Line error:
Clear the over- or
under-voltage condition. The amplifier will
resume operation when the input voltage is
brought within the operating range of the ampli-
fier. More information is available in the
High/
Low Line Indicator
topic in this section.
2.
Overtemp condition:
Leave the amplifier
in Standby mode with the fans operating to
cool the amplifier. When the amplifier’s inter-
nal temperature drops to less than 100°C, the
amplifier will resume operation. Note that in
Summary of Contents for 8500 Series
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