jhaan92
A Work In Progress...
Just acquired a fairly decent looking CR-820 for the low price of free. Only one small glitch - doesn't power on!
Took a closer look at the unit last night, and found that the main fuse was blown. So I replaced it another fuse of the same rating, and it powered up for literally one second, and POOF! The fuse went out again. I am pretty certain that it is on the main power supply board, as the rest of the fuses were pulled and it did the exact same thing again.
I had initially suspected output transistors, but given the fact that the unit dosen't even have the chance to get past the power up protection, I was considering simply starting off with a re-cap of the power supply board.
Any suggestions on the best way to approach this? I took a look at the service manual, but while Yamaha built a great little receiver, the people who were designing the service manual felt that a trouble shooting flow chart wasn't worth the effort, but I digress...
-Jason
Took a closer look at the unit last night, and found that the main fuse was blown. So I replaced it another fuse of the same rating, and it powered up for literally one second, and POOF! The fuse went out again. I am pretty certain that it is on the main power supply board, as the rest of the fuses were pulled and it did the exact same thing again.
I had initially suspected output transistors, but given the fact that the unit dosen't even have the chance to get past the power up protection, I was considering simply starting off with a re-cap of the power supply board.
Any suggestions on the best way to approach this? I took a look at the service manual, but while Yamaha built a great little receiver, the people who were designing the service manual felt that a trouble shooting flow chart wasn't worth the effort, but I digress...
-Jason