Amplifier Module Testing - QSC K.2 Series Service Manual

7.2 Amplifier module testing

The next sections discuss standalone bench testing of the amplifier module (when removed from the speaker enclosure).
Model verification
For verifying the model and firmware version, navigate the menu: HOME
Menu -> SETTINGS. The model and the firmware version are located on the
topline as shown in Figure 7.2.1.
Test setup
Please see the setup diagram in Figure 7.2.2 for a visual representation of the
test setup.
1. Connect the K.2 test adapter to the amplifier module's output connector.
2. Connect a test load to the output terminals of the adapter.
3. Connect the Class D filter inputs to the output terminals of the adapter.
4. Connect the distortion analyzer to the Class D filter. Enable the 80k Hz low pass filter.
5. Connect a dual-channel oscilloscope to the following test points:
• Ch1 - a 10X (vertical sensitivity - 2 V/cm) scope probe to the Class D filter output.
• Ch2 - a 1X (vertical sensitivity - 0.1 V/cm) scope probe to the distortion analyzer output.
6. Set the output of function generator to: 0.00 Vrms, 1 kHz, sine wave.
7. Connect the output of the signal generator to either Ch.A or Ch.B input connector of the amplifier module. Do not use
stereo input Ch.C.
8. Plug the amplifier module into a variac and set up an AC line current monitor.
9. Turn the K.2 power switch on.
Figure 7.2.2 - Setup diagram for all K.2 amplifier models. This test setup also includes a distortion analyzer.
TD-001517-01
K.2 Series Service Manual
Figure 7.2.1 - Model and firmware verison
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