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Old 09-27-2020, 08:44 PM   #9
khajr
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Join Date: Sep 2020
City & State: Lexington, KY
My Country: United States
Line Voltage: 120VAC 60Hz
I'm a: Knowledge Seeker
Posts: 19
Default Re: troubleshooting definitive technology prosub 60

Attached is the IR image of the board. Nothing blew. R7 is hot. The camera was set to auto scale temp range based on field of view. so it was 169 degrees F but it got as high as 200 degrees F when looking at it for a few more seconds before I turned the power off. Is it supposed to be that hot? I will have to order one but I am not sure what to order to replace it. The markings are SCK 202 and on the schematic it says 20 NTC SL20002 US Sensor. But I can't seem to find anything on mouser that matches that. D1 shows hot but it is directly down stream from R7. I will also buy another D1 (DF08) and I have plenty of 1 ohm 1/2 watt resistors for R19. I think Q4 and Q 1 are fine but I will get a couple more. C14 showed warm when I took this pic (lower right of image) but that was errant. It never showed warm again.

Badcaps thanks so much for your suggestion for the dim bulb tester.
Attached Images
File Type: jpg IR_Sub.JPG (35.6 KB, 6 views)

Last edited by khajr; 09-27-2020 at 09:09 PM..
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