Hi,
I have this receiver Kenwood KR-V45.
It has exactly the same fault shown here on a Kenwood KR-V55.
Kenwood KR-55R, EQ Fault - YouTube
Here is a part of the schematic:
Is this a common fault?
Does anyone know what clould be the problem?
Is this a capacitor issue?
Thank you for help.
Best regards,
Christian
I have this receiver Kenwood KR-V45.
It has exactly the same fault shown here on a Kenwood KR-V55.
Kenwood KR-55R, EQ Fault - YouTube
Here is a part of the schematic:
Is this a common fault?
Does anyone know what clould be the problem?
Is this a capacitor issue?
Thank you for help.
Best regards,
Christian
Attachments
Kenwood KR-V55R Audio Video Receiver Manual | HiFi Engine
Sign up and take a look at the manual, hopefully it gives some useable information.
They also have the manual for yours it looks like.
Sign up and take a look at the manual, hopefully it gives some useable information.
They also have the manual for yours it looks like.
Hi Phase,
Yes I have the manual for mine.
I thought maybe someone already figured out, what is the reason and can tell...
Yes I have the manual for mine.
I thought maybe someone already figured out, what is the reason and can tell...
This could be a bad ground. Measure the resistance between ground on the EQ board and a known-good ground point (terminals perhaps). If higher than basically a direct short, trace ground back. Should you find any connections made by screws, those would be highly suspect - prime candidates for at least retightening, maybe some additional cleaning up if really needed.
Modification...
Hi,
in the meantime I found that there is a defect in the switching- matrix of IC2, Toshiba TC9164N or incorrect controll signal from the controller.
It seems that both digital switches pin 10 / 11 for the right channel and
pin 18 / 19 for the left channel where permanently connected, so the equalizer ran in a feedback-loop, which caused the effect shown in the video.
Because the TC9164N are out of production, I solved this for me by isolating / cutting pin 10 for right channel and pin 19 for the right channel of this IC2 of the circuit.
Here is the modified schematic:
Now the equalizer can not be switched to the defeat- mode anymore, but this can also be reached, by setting the equalizer- faders to middle- position.
At least the whole receiver / equalizer is useable again. 🙂
Best regards,
Christian
Hi,
in the meantime I found that there is a defect in the switching- matrix of IC2, Toshiba TC9164N or incorrect controll signal from the controller.
It seems that both digital switches pin 10 / 11 for the right channel and
pin 18 / 19 for the left channel where permanently connected, so the equalizer ran in a feedback-loop, which caused the effect shown in the video.
Because the TC9164N are out of production, I solved this for me by isolating / cutting pin 10 for right channel and pin 19 for the right channel of this IC2 of the circuit.
Here is the modified schematic:
Now the equalizer can not be switched to the defeat- mode anymore, but this can also be reached, by setting the equalizer- faders to middle- position.
At least the whole receiver / equalizer is useable again. 🙂
Best regards,
Christian
