Hello everybody,
I have a non working Sansui 1000 that I am trying to fix. I read through most of the threads I could find and started with new caps in the power supply. I put in new 200uf caps and re-stuffed the multi caps. I also replaced the rectifier diodes but have a question about what I think is supposed to be the bias rectifier. In the manual it is labeled SE but I haven't seen any diode that looked like that. I already replaced it with a 1n4007 and hope that will be okay. I'm attaching a photo of the actual component and the portion of the schematic.
The schematic taped to the inside of the cover indicates that it needs a 3amp fuse, but 5amp is written on the chassis. After I recapped the power supply can caps, replaced the diodes and a new sloblow 3amp fuse, I fired it up it appeared that all the tube heaters lit up and then blew the fuse after about 3 seconds. I didn't try out a 5 amp fuse because I decided I wanted to gather some advice before damaging it further. I still have the remaining electrolytics to replace and I know I need to replace the pio's but was hoping to get it up and running before ordering those. From what I read I thought there was a high likelihood that the can caps and diodes were shorted but replacement of those did not yet fix it.
In one thread it was mentioned that I should test if the power transformer is shorted by lifting the heater filament and b+wires of the transformer and turning it on. Is that correct? I tested all the tubes except the 25e5's because I don't have the anode cord thing on my tube tester. The tubes all read good except on 12ax7 which I replaced with one of the new sturdy EH ones.
Looking for some advice to steer me in a more correct course on this.
I'm attaching the schematic with the SE part and a picture of it for conformation.
Thanks in advance for any advice.
I have a non working Sansui 1000 that I am trying to fix. I read through most of the threads I could find and started with new caps in the power supply. I put in new 200uf caps and re-stuffed the multi caps. I also replaced the rectifier diodes but have a question about what I think is supposed to be the bias rectifier. In the manual it is labeled SE but I haven't seen any diode that looked like that. I already replaced it with a 1n4007 and hope that will be okay. I'm attaching a photo of the actual component and the portion of the schematic.
The schematic taped to the inside of the cover indicates that it needs a 3amp fuse, but 5amp is written on the chassis. After I recapped the power supply can caps, replaced the diodes and a new sloblow 3amp fuse, I fired it up it appeared that all the tube heaters lit up and then blew the fuse after about 3 seconds. I didn't try out a 5 amp fuse because I decided I wanted to gather some advice before damaging it further. I still have the remaining electrolytics to replace and I know I need to replace the pio's but was hoping to get it up and running before ordering those. From what I read I thought there was a high likelihood that the can caps and diodes were shorted but replacement of those did not yet fix it.
In one thread it was mentioned that I should test if the power transformer is shorted by lifting the heater filament and b+wires of the transformer and turning it on. Is that correct? I tested all the tubes except the 25e5's because I don't have the anode cord thing on my tube tester. The tubes all read good except on 12ax7 which I replaced with one of the new sturdy EH ones.
Looking for some advice to steer me in a more correct course on this.
I'm attaching the schematic with the SE part and a picture of it for conformation.
Thanks in advance for any advice.