Onix Amplifier Repairs

Onix OA21

Onix OA21 Amplifier

This one had blown the LHS channel; o\p transistors MJ15003\4, drivers ZTX653\753, several 100 ohm resistors and the BC239C temp sense transistor.

Onix OA21

Onix OA21 Amplifier

The phono bc3 transistor had blown and the capacitor on the DC in to the board 47µF 40V, the LM317 had also blown, the 22µF 16V tantalum was a 300 ohm resistor.

Onix OA21

Onix OA21 Amplifier Onix OA21 Amplifier

This was looking like a Naim clone and was not producing any sound, there was a resistor open circuit in one channel and one of the inputs wasn't working. In this amp the inputs are selected by relays, one was faulty and needed replacing.