Arcam Diva A65 Amplifier Repair
Автор: Audio Amplifier Servicing
Загружено: 2020-07-26
Просмотров: 656
Описание:
Fault
Amplifier powering up and speaker protection relay changing over.
Input selection LEDs not illuminating.
The above is caused by the failure of the Microprocessor Z900 HT48R30.
Replacing the Micro restored normal operation.
While on the work bench the Amplifier circuit board was inspected for dry joints, a common problem are dry joints on the Sanken Audio output Transistors resulting in the Amplifier staying in protection mode.
As can be seen in the video dry joints can be seen on both the right and left channels.
Solder joints reflowed, as well as the RCA input sockets, the power input socket, head phones socket and the balance, Treble and Bass potentiometers.
The speaker protection relay was also replaced to avoid any future issues with loss of Audio due to oxidised contacts.
All user control and switches cleaned with De-Oxit to ensure noise free operation.
Amplifier fully tested working correctly.
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