Crown ce 4000 - Page 6

CE 4000 Service Manual
VI
130485-1 Rev. B
©2002 Crown Audio, Inc.
4.4.2 Troubleshooting Trianglewave Generator and BCA
Output Stage. ...............................................................................4-5
4.4.3 Troubleshooting Power Supply, PFC PWA and Full Bridge
DC to DC Converter......................................................................4-6
4.4.4 Identifying Symptoms...................................................................4-6
4.4.5 Identifying and Repairing the Cause............................................4-7
4.5 Required Test Equipment.......................................................................4-8
4.6 Electrical Checkout Procedures ............................................................4-9
4.6.1 Quiescent AC Power Draw...........................................................4-9
4.6.2 Gain Switches...............................................................................4-9
4.6.3 Bridge Mono Operation................................................................4-9
4.6.4 Frequency Response ...................................................................4-9
4.6.5 Short Circuit Test ..........................................................................4-9
4.6.6 Output Power................................................................................4-9
4.6.7 Intermodulation Distortion ............................................................4-9
4.6.8 Signal to Noise Ratio ....................................................................4-9
4.6.9 Crosstalk at 20 kHz ....................................................................4-10
4.6.10 Post Test Settings .....................................................................4-10
4.7 Calibrations..........................................................................................4-10
4.7.1 Gaussian Filter Calibration .........................................................4-10
4.7.2 Overlap Correction and Adjustment...........................................4-10
4.7.3 Current Sensing Calibration .......................................................4-11
4.7.4 Output Filter Calibration .............................................................4-11
5 Parts....................................................................................................5-1
5.1 General Information ..............................................................................5-1
5.2 Ordering and Receiving Parts ..............................................................5-1
5.2.1 Terms ...........................................................................................5-1
5.2.2 Shipment .....................................................................................5-1
5.3 Mechanical Parts ...................................................................................5-1
5.3.1 CE4000 Amplifi er Assembly.........................................................5-2
5.3.2 Back Panel Assembly...................................................................5-4
5.3.3 CE4000 PS Primary Heatsink Assembly ......................................5-5
5.3.4 CE4000 PS Diode Heatsink Assembly .........................................5-6
5.3.5 CE4000 PS Output Heatsink Assembly........................................5-7
5.3.6 CE4000 Standard Input Assembly ...............................................5-8
5.3.7 CE4000 Standard Domestic Ouput Assembly .............................5-9
5.3.8 CE4000 Power Switch Assembly ...............................................5-10
5.4 Circuit Board Parts...............................................................................5-11
5.4.1 Circuit Board and Schematic Part Numbers ..............................5-11
6 Schematics.........................................................................................6-1
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