I am trying to repair a generation 2 sub. I have narrowed the problem down to the secondary power supplies. R37 has been burned out, there were posts that said R37 is a 18 ohm resistor however the marking on posted pictures show a smt resistor marked 18d. This is not a 180 Ohm resistor. Has anyone successfully repaired a sub 2 with the problem being the secondary logic voltages ? I believe I have identified Q16 and D6? marked as Y2 and 2F. Any help would be appreciated, as there is very little info on the web. Thanks, Carl
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Hello !
I'm currently racking my brains over this problem, the resistor is R37- marking code 01B =1k .
Good luck with the repair, if I manage to repair my sub I will share.
Thank you for your response. I replaced R37 with a 1k and it promptly smoked. Further investigation showed a 1 ohm resistor R77 is open and Q10, a mosfet, measures short between all pins. Q16 also has an open between E and B. Parts are on order..Will keep you in the loop. There is a video in German that shows replacing R37 but since I don't speak German, I have no idea what is being said. Good luck with your repair as well.
My power supply started after replacing the elements.
r77 - 1ohm
r37 - 1k
Q16 -pnp
Q10 - p chanel
D15 - B280
To be safe, I also changed the IC TL5001
works well the voltage of C49 is 12 volts .
I wish you success .
Thank you for all that info...... I have all the parts here or on order except D15 which I will look at the data sheet for details: I may have one here if it is a standard zener. We seem to be in a very small club that is trying to repair this equipment.
B280 =2.0A HIGH VOLTAGE SCHOTTKY BARRIER RECTIFIER
I installed a B2100, I had one on hand and it works well.
Thank you
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