Sony XM-7547, no output, help.

[evianamp2011]

I went ahead and ordered the transformer.


I did unwind the broken transformer and it had apprx 20 just between the two outer pins so am assuming the outer pins have around 35 windings and the second pin 15 windings, but that's just my guess.

Now i wait for the new transformer to arrive.

 

[Perry Babin]

You should try the extra windings on the main transformers. If there is a problem causing excessive current draw through the small transformer, you may damage the new transformer.

 

[evianamp2011]

Ok, i just got the 22g magnet wire. I'll see if i can go outside (25 degrees where I'm at).

 

[evianamp2011]

Loss like I'm going to have to wind it up myself, the part is backorder and wool take two weeks before its even order...

One question Perry.... On the via holes (secondary windings) could i use 22g stranded wire...since it has to go from one end of the amp to the power supply board (where am winding). May i use spade connectors between the boards to separate the stranded wire to the magnet wire. Or is this not recommended??


For of the copper jumpers (6 of them total) broke (where the rail voltage and grounds go from the power supply board to the amplifier board), so i removed all of them and will use stranded wire,, with spade connectors (encase i have to separate the boards when removing from the chassis, its hard to remove both boards at the same time.

 

[Perry Babin]

This appears to be two questions.

I see no reason to go from magnet wire to stranded wire.

You can use spade connectors and stranded wire to replace the jumpers.

 

[evianamp2011]

Thanks, i didn't see why not but i rather ask and be certain than assume.

I managed to do 10 windings (5 going one way the other 5 winded the opposite way on the other half of the transformer. I'll post a pic so i can be more clear.