Anything new about this error?

I have the same problem.

 

What error ?
What problem ?

 

The kenwood krf-x... no sound fault.
I did all the things you mentioned but still no sound.

 

Write down what you did and show me the area I talked abt.

 

://forum.allaboutcircuits.com/threads/help-fixing-problem-with-kenwood-krf-x7775d.94367/

Thats the thread iam talking about...

 

I also checked the datalines between micon and sub micon and dsp. No errors....

 

I do not remember much but I think there is a test mode in the service manual.
Can you read it try the test.

 

I have an identical problem in this model, what I have noticed is that the mute pin in test mode is 3.3v and in normal mode it is only aprox 1.2v on DSP board

 

@DeeJayalex You hijacked someone else's thread, twice.
You have your own thread. Please continue with your query there.

https://forum.allaboutcircuits.com/threads/help-fixing-problem-with-kenwood-krf-x7775d.146147/

 

So I fixed one couple of years back.

I remember no Audio output from tht either.

I did replace some DSP related SMD chips but to no Vail.

It was some capacitor issue. I recall couple of smaller caps and a super cap near a μC.

The PCB is at the bottom most. Where I'll know when I see the PCB.

Post some pictures of the inside so I can recall my rusty memories.

I think it was a uC not resetting issue. Well, tht's what I figured cause it still works like a charm

So now i am bag to the Unit... I have changed the Gold Cap... (only bevore disassembled the Unit) ..

The Unit can now only be switched in The Test mode by Pressing Input select and Power this was before easier to go into that Mode ;-)..

But the hole Sound in normal Mode is gone as well like before.

Now i disassembled the Unit and take out the Card´s and looked under the Layer Board for Inspection.

I found that the Big AC/DC Bridge is soldered out at all Pin´s could that be a Part of the Problem.. The Solder Pin´s are very cold and scratched.

I want to ask you if it is a good Idea to take out all Cap´s for testing it´s ESR and put in new ones with better ESR ( by the Same Cap and Voltage)

How about the AD/DA Board on the Photo with Software on a Flash is there a Way to look on it and if necessary change the Software on the Flash..

Thank´s for Today i come bag Tomorrow and we look forward to fix this Unit.. Jürgen

I have a same model and same problem . .we change the ADSP IC (ANALOG DEVICES). and its work again.same like brand new.

 

I have a Audio Video Sourround Receiver that stop sending Sound to the Output of the Speakers in normal operation Modes.
When i switch it on in Test mode the analog Inputs are working but if i switch bag to normal operation mode there is no sound at all.
I have the service Plan and the operation handbook. What i at the Moment don´t have is a the IR Remote for it because my Dog used it as a bone ;-)).

Please help me understand where i can look or test to solve the Problem i searched the net but there was many about that Problem without even one Fix that i can use to solve it.

Thanks from Germany out of NRW from Jürgen to all that can or will try to help me going back on line with that device.

 

I fixed open the sound problem on the kenwood receiver receiver with the no sound, and how I did it is. Where it says input selector there's 2 buttons left and right. Press both of them shut off the receiver and turn the receiver back on pressing those 2 buttons at the same time. Why you do that and turn it on the screen? She come up with nothing besides lines in it. For 10 seconds and the sound should work from there. That's what I did. It worked perfect. I have this brand new receiver. I've been working on this for a week and today which is Monday early morning. I've been troubleshooting and troubleshooting, and finally just Did that? It worked it reset? Whatever and now it's working, hopefully, this helps anybody
Wit this model KRF-X7775D