Crown XLS-802 Specifications. Crown power amplifier specifications xls series. Also See for XLS-802. Operation manual - 40 pages. Amplifier Crown XLS1000 Service Manual (94 pages) Amplifier Crown XLS 202 Operation Manual. Xls series power amplifiers (28 pages). Which may arise during installation, operation or maintenance. The information provided in this. To obtain the latest version of this manual, please visit the Crown website at. Model Names: XLS 202, XLS 402, XLS 602, XLS 802, XLS 5000.
Crown xls 802, wont turn on Hello all, I have recently acquired a dead crown xls802. The amp doesn’t power up. If it is plugged in and turned on there is a small flash of the signal leds but then nothing.
If you immediately try again the signal leds do not flash. The amp has mains power from the input to the fuse and to the switch but none to the transformer.
The small capacitors on the psu board (near the mains bit) get very hot. They are labelled PTC, pics can be added. It seems this is some kind of protection to stop the amp turning on in the event of a failure.
I think a/many output devices have gone but I don’t know. Any advice would be appreciated. Cheers ed simonp1100.
If you have tested all the low voltage sections & they seem to work, then the fault is mostly down to one or more of the output transistors. The best way i found to find the suspect faulty device / devices without taking all the transistors off of all the heatsinks is to measure with a meter between the casing of each transistor & the collector of that transistor, when you find the short, then you need to desolder all the PCB pads to the transistors that are connected to that specific heatsink bank and then measure each transistor in that bank to isolate which one / ones are at fault. Please also check the driver transistors (TIP50 / TIP47 / MJE5731A) & the current limit circuit (BC184L / BC214L & the diodes) on each channel as well as these tend to go when one or more of the output transistors blow. Once the faulty transistor / transistors have been taken out, confirm that the amp powers back up and goes out of protect.
If NONE of the transistors are found to be faulty, then the fault must be one of the bridge rectifiers. There could be a small chance that the drive circuit could be at fault, but this is very rare (if you have already checked the driver transistors & the current limit circuit).
Don't forget to check the 47ohm 25 watt soft start resistor is at 47ohms (as this tends to go open circuit as well) & the PTC.
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Crown Xls 802 Manual
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Crown Xls 802 Service Manual
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