sossages
Novice Member
AMPLIFIER / SPEAKER FAULT
Anyone technical able to diagnose fault?
My amplifier keeps blowing up. Just 6 months old and working fine one day I turn it on at low volume. It worked perfectly (as always) but only for 2 mins before cutting out.
Sent away and repaired. Got back and worked perfectly at low volume for two minutes before cutting out.
New replacement amplifier sent out. Worked perfectly at low volume for a minute before cutting out.
Denon Amplifier fault history in detail;-
Works fine from new for nearly 6 months. No glitches. Used daily.
Connections;-
SACD player both analogue RCA and Digital Co-ax
Turntable to Phono input
Mac via USB
AV receiver to HT Bypass (EXT.PRE)
Fault 1
For no reason, having been used without issue the previous day and for the previous few months, a minute or two after turning on and working fine it cuts out and blinks red. Volume only at 9 o’clock. Source digital co-ax 1 in from SACD player. All other supplies in either turned off or on standby. Amplifier circuit has failed.
Fault 2
Back from repair connect only digital co-ax 1 and speakers and play SACD player, volume at 9 o’clock
Works fine for one or two minutes and then cuts out and blinks red. Amplifier circuit has failed.
Fault 3
Brand new replacement amplifier using existing power lead.
Connect everything up including HT Bypass (EXT.PRE) but everything either off or on standby. Turn it on with volume at zero. Fine. Scroll through input selector and notice hum on HT Bypass which there had never been on the first amplifier before there had been any faults. Seconds later it cuts out and blinks red. Amplifier circuit has failed. The AV Receiver was in standby. Note the AV receiver was not connected to HT Bypass when fault 2 occurred. I did not scroll through to HT Bypass immediately before fault 1 or 2 so don’t know if there was a hum.
I have checked connections to speakers. All good. They are factory Airlock terminations with banana one end and spades the other. No cuts in the cable.
The Monitor Audio speakers are spec. wise compatible and are currently away for fault test. So far no fault has been found but will be tested again.
The SACD player is connected to the same double socket and continues to work fine.
All the other inputs other than the Mac are on the same ring main and continue to work fine.
Other than these and a TV left in standby and Sub switched off nothing else is on the ring main.
I have had an electrician test the voltage etc of the mains and it is fine. He also states that a high voltage would have affected all on the circuit, which it hasn’t.
Anyone technical able to diagnose fault?
My amplifier keeps blowing up. Just 6 months old and working fine one day I turn it on at low volume. It worked perfectly (as always) but only for 2 mins before cutting out.
Sent away and repaired. Got back and worked perfectly at low volume for two minutes before cutting out.
New replacement amplifier sent out. Worked perfectly at low volume for a minute before cutting out.
Denon Amplifier fault history in detail;-
Works fine from new for nearly 6 months. No glitches. Used daily.
Connections;-
SACD player both analogue RCA and Digital Co-ax
Turntable to Phono input
Mac via USB
AV receiver to HT Bypass (EXT.PRE)
Fault 1
For no reason, having been used without issue the previous day and for the previous few months, a minute or two after turning on and working fine it cuts out and blinks red. Volume only at 9 o’clock. Source digital co-ax 1 in from SACD player. All other supplies in either turned off or on standby. Amplifier circuit has failed.
Fault 2
Back from repair connect only digital co-ax 1 and speakers and play SACD player, volume at 9 o’clock
Works fine for one or two minutes and then cuts out and blinks red. Amplifier circuit has failed.
Fault 3
Brand new replacement amplifier using existing power lead.
Connect everything up including HT Bypass (EXT.PRE) but everything either off or on standby. Turn it on with volume at zero. Fine. Scroll through input selector and notice hum on HT Bypass which there had never been on the first amplifier before there had been any faults. Seconds later it cuts out and blinks red. Amplifier circuit has failed. The AV Receiver was in standby. Note the AV receiver was not connected to HT Bypass when fault 2 occurred. I did not scroll through to HT Bypass immediately before fault 1 or 2 so don’t know if there was a hum.
I have checked connections to speakers. All good. They are factory Airlock terminations with banana one end and spades the other. No cuts in the cable.
The Monitor Audio speakers are spec. wise compatible and are currently away for fault test. So far no fault has been found but will be tested again.
The SACD player is connected to the same double socket and continues to work fine.
All the other inputs other than the Mac are on the same ring main and continue to work fine.
Other than these and a TV left in standby and Sub switched off nothing else is on the ring main.
I have had an electrician test the voltage etc of the mains and it is fine. He also states that a high voltage would have affected all on the circuit, which it hasn’t.