Hello All,
I have a SA-3000 that I like very much, but it has developed a problem. I do not have a service manual, so I don't know where to start finding the cause. Every now and then there is a thump followed by a drop out for about 1 second. Red LED 502,marked "No Load", in the high voltage power supply, lights for the duration of the drop out.
This can happen just a single time, or repeated every few seconds until I put the amp in standby. When I take it out of standby it plays fine. Anyone know what I should be looking at? Thanks.
I have a SA-3000 that I like very much, but it has developed a problem. I do not have a service manual, so I don't know where to start finding the cause. Every now and then there is a thump followed by a drop out for about 1 second. Red LED 502,marked "No Load", in the high voltage power supply, lights for the duration of the drop out.
This can happen just a single time, or repeated every few seconds until I put the amp in standby. When I take it out of standby it plays fine. Anyone know what I should be looking at? Thanks.
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Sounds initially like a high resistance soldered joint disconnecting with the heat.
As tubes are used I would check the sockets first and then the soldering round the bases , that's a first step.
As tubes are used I would check the sockets first and then the soldering round the bases , that's a first step.
The regulator may be dropping out, or some electrolytic capacitors could be bad,
or your line voltage could be sagging. There are also many adjustments inside,
see this user manual.
Counterpoint SA-3000 Dual-Channel Hybrid Preamplifier Manual | HiFi Engine
or your line voltage could be sagging. There are also many adjustments inside,
see this user manual.
Counterpoint SA-3000 Dual-Channel Hybrid Preamplifier Manual | HiFi Engine
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