bce22
Active Member
Happy Thanksgiving my Audiokarma friends,
I have an issue with my KA-907. I turned it on yesterday and I have no sound through the Phono inputs. This morning I opened it up to take a look at the Pre-amp board looking for issues visually. The only visual indication of damage was a burnt resistor (R86 1/4 watt 22ohm). I replaced the resistor and it hasn't popped again but of course this didn't solve the problem.
I can verify that neither Phono 1 or Phono 2 have any output. I also plugged the Turntable into Tape and that doesn't output any sound either. Aux input works fine.
I am hoping that someone can instruct me on how to test this circuit to diagnose the problem. I can read a schematic yet I am not a pro at it yet. I have some test equipment including a Fluke with proper leads and on Friday one of those $25 dollar china meters capable of testing a wide range of capacitance and ESR should arrive. I don't have a scope however.
The service manual for the KA-907 is located on HiFiEngine for those that might be willing to provide some advice. http://www.hifiengine.com/manual_library/kenwood/ka-907.shtml
If anyone would be able to instruct I would really appreciate your help in this matter.
Best Regards,
Brad
I have an issue with my KA-907. I turned it on yesterday and I have no sound through the Phono inputs. This morning I opened it up to take a look at the Pre-amp board looking for issues visually. The only visual indication of damage was a burnt resistor (R86 1/4 watt 22ohm). I replaced the resistor and it hasn't popped again but of course this didn't solve the problem.
I can verify that neither Phono 1 or Phono 2 have any output. I also plugged the Turntable into Tape and that doesn't output any sound either. Aux input works fine.
I am hoping that someone can instruct me on how to test this circuit to diagnose the problem. I can read a schematic yet I am not a pro at it yet. I have some test equipment including a Fluke with proper leads and on Friday one of those $25 dollar china meters capable of testing a wide range of capacitance and ESR should arrive. I don't have a scope however.
The service manual for the KA-907 is located on HiFiEngine for those that might be willing to provide some advice. http://www.hifiengine.com/manual_library/kenwood/ka-907.shtml
If anyone would be able to instruct I would really appreciate your help in this matter.
Best Regards,
Brad