11-24-2014, 10:59 AM
I picked up the above model pioneer receiver at antique mall yesterday.
I powered it up and found the signal strength meter and one position indicator lamp lit up.
Opened it up and found 2-blown bus fuses in the power amp. unit. Replaced them and powered up again,this time it blew the line fuse immediately. Not the 2 new fuses in the main amp .
Did some more checking and found 3 of the four bridge diodes in the power supply unit are testing bad.
I could really use some help on how to proceed with this unit. I.E. what I should replace ,check etc.
The board units look like they will be easy to remove to replace parts. Here is schematic.
Thanks
[Image: http://i1336.photobucket.com/albums/o654...cd640d.jpg]
I powered it up and found the signal strength meter and one position indicator lamp lit up.
Opened it up and found 2-blown bus fuses in the power amp. unit. Replaced them and powered up again,this time it blew the line fuse immediately. Not the 2 new fuses in the main amp .
Did some more checking and found 3 of the four bridge diodes in the power supply unit are testing bad.
I could really use some help on how to proceed with this unit. I.E. what I should replace ,check etc.
The board units look like they will be easy to remove to replace parts. Here is schematic.
Thanks
[Image: http://i1336.photobucket.com/albums/o654...cd640d.jpg]
