Hello Forum,
Maybe someone can help me with a solution to a prob with the above amp that was working fine with the input to the amp via the AUX socket, plugged into my laptop and output connected to 2 speakers as expected. I shutdown my laptop with the plug still in both sockets and since the amp simply will not produce any sound from any type of input device. The amp powers up etc. Have tried obvious things like power off - back on after 15 mins or so, but still nothing. Both of the valves are on when the system is on. Technical assistance @ Fatman havent responded so its now an expensive door stop.
Thanks in advance if you can point me in the right direction...
Maybe someone can help me with a solution to a prob with the above amp that was working fine with the input to the amp via the AUX socket, plugged into my laptop and output connected to 2 speakers as expected. I shutdown my laptop with the plug still in both sockets and since the amp simply will not produce any sound from any type of input device. The amp powers up etc. Have tried obvious things like power off - back on after 15 mins or so, but still nothing. Both of the valves are on when the system is on. Technical assistance @ Fatman havent responded so its now an expensive door stop.
Thanks in advance if you can point me in the right direction...
97 views and no reply so far. Might as well do i what i can to help. I am not familiar with the Fatman Hybrid, so my suggestions will be general.
Too many information missing so before i can make suggestions, i have to assume the following:
- You don't have the schematic for your amplifier
- You can use a voltmeter and understand electrical safety
- You have checked for blown fuse. It's right under the mains socket on the unit.
- Your unit is out of warranty (because you'll be sending it back, rather than trying to troubleshoot yourself)
With that being said, if i really have to make a blind guess, the valves are supplied with high voltage (for the price the Fatman are retailing, they better be) and judging from the unit's physical size, the high voltage comes from an SMPS unit, rather than linear PS. This reminds me of Miniwatt N3 amplifiers that use SMPS as well and how some of them are now dead. Now, to make sure your SMPS is working, do the following:
1. Turn on the unit and check if the tubes are glowing. Maybe difficult to see through the cage around the tubes but you should see some dim glow. If they do, at least the tube heaters are working. Some manufactures put LED lamp under the tube so they glow much more brightly (for aesthetics), don't mistake this as heater glow.
2. Find out the model of tube used (should be written on the tube's glass body) and find the pin diagram for it online. Find where anodes (or plates) and cathodes are. Unplug one of the tube and measure the voltage between anode and cathode. Careful, this should be high voltage, something over 100 volts.
If your amp fails either step 1 or step 2, the problem comes from your Power Supply unit. Troubleshooting it requires you to open the case and replace some components, most likely by desoldering.
If this sounds way over your head, i see no other way than to suggest getting someone else to help or send it back to Fatman and pay to fix it.
Too many information missing so before i can make suggestions, i have to assume the following:
- You don't have the schematic for your amplifier
- You can use a voltmeter and understand electrical safety
- You have checked for blown fuse. It's right under the mains socket on the unit.
- Your unit is out of warranty (because you'll be sending it back, rather than trying to troubleshoot yourself)
With that being said, if i really have to make a blind guess, the valves are supplied with high voltage (for the price the Fatman are retailing, they better be) and judging from the unit's physical size, the high voltage comes from an SMPS unit, rather than linear PS. This reminds me of Miniwatt N3 amplifiers that use SMPS as well and how some of them are now dead. Now, to make sure your SMPS is working, do the following:
1. Turn on the unit and check if the tubes are glowing. Maybe difficult to see through the cage around the tubes but you should see some dim glow. If they do, at least the tube heaters are working. Some manufactures put LED lamp under the tube so they glow much more brightly (for aesthetics), don't mistake this as heater glow.
2. Find out the model of tube used (should be written on the tube's glass body) and find the pin diagram for it online. Find where anodes (or plates) and cathodes are. Unplug one of the tube and measure the voltage between anode and cathode. Careful, this should be high voltage, something over 100 volts.
If your amp fails either step 1 or step 2, the problem comes from your Power Supply unit. Troubleshooting it requires you to open the case and replace some components, most likely by desoldering.
If this sounds way over your head, i see no other way than to suggest getting someone else to help or send it back to Fatman and pay to fix it.
Thanks for the reply -
- You don't have the schematic for your amplifier --- Correct
- You can use a voltmeter and understand electrical safety ---- Hope so!
- You have checked for blown fuse. It's right under the mains socket on the unit. --- Yep
- Your unit is out of warranty (because you'll be sending it back, rather than trying to troubleshoot yourself) --- Correct
I will take a look and get back to you, thanks again.
- You don't have the schematic for your amplifier --- Correct
- You can use a voltmeter and understand electrical safety ---- Hope so!
- You have checked for blown fuse. It's right under the mains socket on the unit. --- Yep
- Your unit is out of warranty (because you'll be sending it back, rather than trying to troubleshoot yourself) --- Correct
I will take a look and get back to you, thanks again.
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