Hello everyone,
Could someone please advise on this. I have this Yamaha taken from a friend for repair, especially since it had a USB for my interest. But it is not working at all.
Here is what has been done so far. Checking the standby switch did not show 3.3 volts on one of its pins, the other was ground. it is showing as 0.60 volts. I have changed the switch as it had some resistance even when normally open. After changing the switch, I next saw that PIN 91 is not showing 3.3 volts.
The processor clock pin show 2.8 on pin 18 (XOUT) and 0.80 on pin 20 (XIN). I am not sure if the processor itself is not working.
Next, the CB 221 connector did not have +3.3M present on it due to bad connector pin contact with the flat cable. I did press it with a needle and now at least it shows 3.3 volts.
Any suggestions/ideas or different ways will be helpful to me.
Thank you for reading this,
Hemant
I have attached the service manual for referance.
Could someone please advise on this. I have this Yamaha taken from a friend for repair, especially since it had a USB for my interest. But it is not working at all.
Here is what has been done so far. Checking the standby switch did not show 3.3 volts on one of its pins, the other was ground. it is showing as 0.60 volts. I have changed the switch as it had some resistance even when normally open. After changing the switch, I next saw that PIN 91 is not showing 3.3 volts.
The processor clock pin show 2.8 on pin 18 (XOUT) and 0.80 on pin 20 (XIN). I am not sure if the processor itself is not working.
Next, the CB 221 connector did not have +3.3M present on it due to bad connector pin contact with the flat cable. I did press it with a needle and now at least it shows 3.3 volts.
Any suggestions/ideas or different ways will be helpful to me.
Thank you for reading this,
Hemant
I have attached the service manual for referance.
Comment