To Next PageTo Next PageHow to connect half wave rectified AC power flyback for Crown Amplifier?
To connect a half wave rectified AC power flyback, use an isolation transformer. Warning: Not using an isolation transformer in Step 5 can result in test equipment damage.
How to check DC supplies on the power supply side of a Crown Amplifier?
To check the DC supplies on the power supply side of your Crown Amplifier using a multimeter, confirm the following test points with respect to SMPS reference (TP2): TP6, TP7, and TP8 should read +15V; TP46 should be +7.5V; TP252 should be 19.0V; U2 pin 11 should be 5.1V; and TP256 and U14 pin 1 should be 5.0V.
How to check DC supplies on the audio side of a Crown ce 4000?
To check the DC supplies on the audio side of your Crown Amplifier using a multimeter, confirm that TP254 is +15V, TP255 is -15V, and TP257 is 5.0V. All measurements should be made with respect to AGND (TP-105).
How to check audio side triangle waveforms at TP102 on a Crown ce 4000 Amplifier using an oscilloscope?
To check the audio side triangle waveforms at TP102 on your Crown Amplifier using an oscilloscope, measure with respect to TP105 (see Figure 4.9).
How to check audio side triangle waveforms at TP202 on a Crown ce 4000 Amplifier using an oscilloscope?
To check the audio side triangle waveforms at TP202 on your Crown Amplifier using an oscilloscope, measure with respect to TP205 (see Figure 4.9).
How to check BCA output stage gate switching on a Crown ce 4000 using an oscilloscope?
To check the BCA output stage gate switching on your Crown Amplifier using an oscilloscope, probe at each gate drive resistor.
How to check power supply clocks at TP-253 and TP-12 on a Crown Amplifier using an oscilloscope?
To check the power supply clocks at TP-253 and TP-12 on your Crown Amplifier using an oscilloscope, refer to Figure 4.12. All measurements are with respect to SMPS reference.
How to check PFC gate switching at TP-5 on a Crown ce 4000 using an oscilloscope?
To check PFC gate switching at TP-5 on your Crown Amplifier using an oscilloscope, measure with respect to TP-2, as shown in Figure.
How to check gate switching of the Full Bridge DC to DC Converter on a Crown Amplifier using an oscilloscope?
To check the gate switching of the Full Bridge DC to DC Converter on your Crown Amplifier using an oscilloscope, refer to Figure 4.15. Verify the phase shift at startup. Probe at TP-27, TP-29, TP-30, and TP-31. All measurements are with respect to SMPS reference.
What to do to simulate front panel switch on Crown Amplifier?
To simulate the front panel switch on for your Crown Amplifier, place a jumper between J28 and J29.
General| Channels | 2 |
|---|---|
| Power Output (8 Ohms Bridged) | 2000W |
| Total Harmonic Distortion | < 0.5% |
| Input Sensitivity | 1.4V |
| Input Impedance | 20 kOhms balanced, 10 kOhms unbalanced |
| Power Output (4 Ohms) | 1000W |
| Frequency Response | 20Hz - 20kHz |
| Protection | Short circuit, thermal, overload |
