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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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Behringer GMX1200H guitar amp, 2011 (?)
Stock fault ?
Phones o/p but no sp o/p. Both pcb traces to the main bridge rects fried. 2xLM3886 seem ok cold DVM "test". Both main caps good ESR and capacity, diodes test ok. Both main caps bowed ends and one with brownish dried "wax" at the cross, presumably electrolyte but no hole seen. All the caps on the PA are Xunda, don't remember seeing that name before, suspect? presumably China. Main caps are radial Xunda RK series, 3300uF,50V 105 deg C, the supposed glue to the pcb has (heat?)failed and they can flop around on axial-type gauge of terminals, not snap-in. |
#2
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Behringer GMX1200H guitar amp, 2011 (?)
Sounds like the main caps have blown/shorted
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Behringer GMX1200H guitar amp, 2011 (?)
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