Hi guys,
I'm trying to repair a Linn AV 5150 subwoofer with a hum. I acquired it from a gentleman here in Dallas. He tried to repair it unsuccessfully and was simply fed up with it so I picked it up trying to have some fun with it and maybe learn a little bit about electronics along the way.
When I inspected the board I saw a bad thermistor. (I was told that the board was sent to a repair shop where they replaced the capacitors and the board was tested OK). Any ways, I have the schematics for the power supply, the amp, the LED and the Fan controller. The schematic for the power supply shows a temperature sensor where the bad thermistor is. I have very limited education in electronics so I can't figure out the specs for the thermistor just by looking at the schematics. Can anyone here give me a pointer on how to take a guess at the specs of the thermistor?
BTW, Linn is no help. I sent them an email couple weeks ago... They haven't responded.
The attached PDF shows the temperature sensor on p. 3 where the thermistor is highlighted.
Any help is greatly appreciated. Thanks a bunch in advance.
This is also crossed posted in subwoofer section.
I'm trying to repair a Linn AV 5150 subwoofer with a hum. I acquired it from a gentleman here in Dallas. He tried to repair it unsuccessfully and was simply fed up with it so I picked it up trying to have some fun with it and maybe learn a little bit about electronics along the way.
When I inspected the board I saw a bad thermistor. (I was told that the board was sent to a repair shop where they replaced the capacitors and the board was tested OK). Any ways, I have the schematics for the power supply, the amp, the LED and the Fan controller. The schematic for the power supply shows a temperature sensor where the bad thermistor is. I have very limited education in electronics so I can't figure out the specs for the thermistor just by looking at the schematics. Can anyone here give me a pointer on how to take a guess at the specs of the thermistor?
BTW, Linn is no help. I sent them an email couple weeks ago... They haven't responded.
The attached PDF shows the temperature sensor on p. 3 where the thermistor is highlighted.
Any help is greatly appreciated. Thanks a bunch in advance.
This is also crossed posted in subwoofer section.
I don’t really know. I just inspected the board and saw that the thermistor was pretty much destroyed, cracked with the inside exposed. The pitch of the hum changed after I took it out the board. At first, I thought that it’s only there to turn on the fan/shutdown after a threshold temp is reached, so taking it out wouldn't change anything…. Well, that wasn't the case….
Anyways, I was not sure where would be the right place to post.
Anyways, I was not sure where would be the right place to post.