Pioneer SX-737 issues

[Electronic M]

Got an 8 ohm resistor or a pair of headphones you don't care about to try as a dummy load?

[vortalexfan]

Originally Posted by Electronic M

Got an 8 ohm resistor or a pair of headphones you don't care about to try as a dummy load?

I do have some old headphones I don't care about that I can use for a dummy load, and I know where you're heading with this, which is to rebias the amp, which is precisely what the service manual for this thing says to do whenever transistors in the amplifier are replaced.

But the thing is, I've tried hooking a dummy load to the receiver and tried rebiasing the amp and when I tried to rebias the amplifer section according to the service manual I can't get the bias down to zero, the bias measures around 35 VDC on both the right and left channels and turning the adjustments makes no difference in the bias voltage.

Is there something I'm doing wrong?

[quaddriver]

Originally Posted by vortalexfan

Is there something I'm doing wrong?

yes, you are forging ahead without a proper diagnosis. You need proper test equipment and read the pioneer section at AK - the 737 has long since been worked out, complete with modern subs and gotchas.

[vortalexfan]

Originally Posted by quaddriver

yes, you are forging ahead without a proper diagnosis. You need proper test equipment and read the pioneer section at AK - the 737 has long since been worked out, complete with modern subs and gotchas.

Ok. Well the problem is, I tried joining audiokarma and they wouldn't approve my membership, so unfortunately I can't use their services.

I guess I can just go on their website and just read through the old postings, I just wouldn't be able to comment on any of them.