Repair of Gemini GX 350 Powered speaker
Fault - Dead, no output
Removed the active amplifier assembly from the cabinet,
See the removed crossover assembly showing the 2 output devices under the amplifier main PCB, 1st thing to check is the two output transistors
Removed the PCB with the output devices
Tested the output devices 2SK1953 2SC5200 found a short circuit on one of the devices, which was expected
Removed both output transistors
Fitted matched pair of 2SK1953 2SC5200 transistors, reassembled the amplifier PCB and tested on the work bench - adjusted the bias, all looked ok full output achieved
Reassembled the crossover unit ready for refitting the amplifier assembly
Refitted assembly back into the cabinet re connecting cables
Tested unit for 4 hours all ok
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