crown xls 1000xls 1000
Posted 27 June 2014 - 04:39 PM
Posted 28 June 2014 - 11:10 PM
Posted 29 June 2014 - 02:51 PM
Posted 04 July 2014 - 05:33 PM
Posted 07 July 2014 - 09:20 AM
In the event of the smps having a catastrophic fault :
The iGBTs must be blown : The four Q9xx transistors are the current buffers for the gate drive of the iGBTs. If the transistors have become faulty and shorted, the modulator U902 may have to be replaced, at the same time. Note : If you still have a fault when you power up, you will destroy the iGBTs again. Beware!
Q902, 905 : 142033-1 XTOR, PNP 20V 2A NSS20200L SOT-23
Q901, 904 : 142034-1 XTOR, NPN 20V 2A NSS20201L SOT-23
Posted 07 July 2014 - 01:41 PM
Note : The actual SMPS reference (V_BULKRET) is NOT ground. You will need to decouple the scope's ground from the AC ground or use an isolation transformer. To verify the modulator's gate signal, you will have to reference the device to the 'bottom' side of the device and its 'gate'.
Posted 07 July 2014 - 02:19 PM
Posted 07 July 2014 - 02:22 PM
Posted 09 July 2014 - 02:06 PM
Posted 10 July 2014 - 11:01 AM
SML : XLS1000; MED : XLS1500; etc.
There are two more designations : Large : XLS2000 and Extra Large : XLS2500
Hope this helps!