Yamaha rxv 465 no display and no power..

[Hemant Choudhary]

Hi All and Sir 73's de Edd,

With all confidence i was sure, upon isolating few components, as mentioned above, the +3.3DSP and +1.3 supply line to the DSP chip was shorted and also the DGND.

i tried to remove the DSP with the hot air gun but even after heating to a good amount of time the IC was not ready to move off its pad.


then i was afraid that after a prolonged expose to the hot air may be i should check the digital board with its entire connection, then ALAS, its gone.

Now, no relay click nothing. i think its DEAD ( This time in real sense).

Here i would like to thank you sir, for your help and the knowledge that you have put forward to me taking all the pains of drawing the diagram, especially for me. i truly appreciate and look forward to you for my new project, which is arriving fast.

Once again thanks a lot to this entire forum community.

Regards,
Hemant.

 

[73's de Edd]

Since you finally discovered that both the +3.3 DSP AND the +1.3 DSP were seemingly shorted to ground .
Did I see where you pulled the C477 on the +1.2 DSP line to see if it was shorted ?

 

[Hemant Choudhary]

I think both the lines of +1.2DSP and +3.3DSP are shorted to each other and to DGND.

Here it was.