Hi,
I have an 8080DB that has very low output from one channel. When I got this receiver, it was blowing the main fuses on the power supply board. Traced that to two shorted output transistiors. Replaced them and got good sound from one channel and very very low sound from the other. Disassembled the front pannel and cleaned the daylights out of all the switches and pots with deoxit d5. Still one channel. While playing with the volume and balance, there was a pop and both channels started working.
Turn it on a few days later, only one channel. Repeated the cleaning and cycled all switches and pots till my wrists were sore. No change. The power meters aren't working either. I've also tried swapping the output transistors right to left but the problem stays on the same side.
I've read through a lot of the discussions in this forum on the Sansui one channel curse. Unfortunately the repair manual I have doesn't have a diagram for the dolby board or the push switch board. It also doen't show how the power meters interface with the output.
Overall this is a very clean unmolested receiver. I would appreciate any ideas the group may have.
Thanks,
LBPete
I have an 8080DB that has very low output from one channel. When I got this receiver, it was blowing the main fuses on the power supply board. Traced that to two shorted output transistiors. Replaced them and got good sound from one channel and very very low sound from the other. Disassembled the front pannel and cleaned the daylights out of all the switches and pots with deoxit d5. Still one channel. While playing with the volume and balance, there was a pop and both channels started working.
Turn it on a few days later, only one channel. Repeated the cleaning and cycled all switches and pots till my wrists were sore. No change. The power meters aren't working either. I've also tried swapping the output transistors right to left but the problem stays on the same side.
I've read through a lot of the discussions in this forum on the Sansui one channel curse. Unfortunately the repair manual I have doesn't have a diagram for the dolby board or the push switch board. It also doen't show how the power meters interface with the output.
Overall this is a very clean unmolested receiver. I would appreciate any ideas the group may have.
Thanks,
LBPete