zenarrrow
Well-Known Member
I started a thread about my SX 980 not having indicator lights did some diagnosing with the help of some very good members here. The only Indicator light that worked was the Stereo Indicator which runs off another power supply than the others.
Instead of just fixing a bad resistor I decided that a complete recap of the Power Supply board to be in order since I was already this far into the rig.
Feeling confident about everything I ordered the parts for the PS board AWR-156. Got them in the mail and jumped in. Everything was going well I did all the Electrolytic capacitors first, after doing those all day yesterday, I tested the unit and everything was working just fine. They I knew would be the easy part.
Today I started with the Transistors with Q5 in particular, I struggled with getting this out but finally got it out and put the new part in place. I took pictures of everything before I started each separate component on the PS board. Everything I took out I took pictures and wrote how they were put in, and placed the new replacement parts in exactly as I took them out.
Finally got done after a while I powered up the unit, I have no sound. I get the power lamps across the top all three work. Now when I tune to a FM station the Stereo Indicator is very dim still lights up and I can see the tuning meter moving when dialed into a station. I tried also the AUX with my CD player again nothing, no noise static anything from either AM/FM or AUX
I am pretty sure I had to have damaged the the Power supply board AWR-156, especially starting with Q5. As I feel I kinda roasted the board trying to remove the transistor. I did learn after that how better to remove them, but maybe too late.
I grabbed my multimeter and as I was walking across the room the positive lead fell off of my cheap DMM. No way to get inside and rewire it. I was able though, to just use the ends of the wires of the pos lead and the neg lead, take out all my fuses and check the ohms. All the fuses are good.
So it seems I am dead in the water until I am able to find another AWR-156 Power supply board to drop in. Hopefully nothing else is toasted. Just strange that the Stereo light is a lot dimmer now.
Just curious if anyone may have any ideas that I may be over looking ? Or if anyone has a PS board for the SX 980 laying around that they would like to sell.
Thanks, Joe
Instead of just fixing a bad resistor I decided that a complete recap of the Power Supply board to be in order since I was already this far into the rig.
Feeling confident about everything I ordered the parts for the PS board AWR-156. Got them in the mail and jumped in. Everything was going well I did all the Electrolytic capacitors first, after doing those all day yesterday, I tested the unit and everything was working just fine. They I knew would be the easy part.
Today I started with the Transistors with Q5 in particular, I struggled with getting this out but finally got it out and put the new part in place. I took pictures of everything before I started each separate component on the PS board. Everything I took out I took pictures and wrote how they were put in, and placed the new replacement parts in exactly as I took them out.
Finally got done after a while I powered up the unit, I have no sound. I get the power lamps across the top all three work. Now when I tune to a FM station the Stereo Indicator is very dim still lights up and I can see the tuning meter moving when dialed into a station. I tried also the AUX with my CD player again nothing, no noise static anything from either AM/FM or AUX
I am pretty sure I had to have damaged the the Power supply board AWR-156, especially starting with Q5. As I feel I kinda roasted the board trying to remove the transistor. I did learn after that how better to remove them, but maybe too late.
I grabbed my multimeter and as I was walking across the room the positive lead fell off of my cheap DMM. No way to get inside and rewire it. I was able though, to just use the ends of the wires of the pos lead and the neg lead, take out all my fuses and check the ohms. All the fuses are good.
So it seems I am dead in the water until I am able to find another AWR-156 Power supply board to drop in. Hopefully nothing else is toasted. Just strange that the Stereo light is a lot dimmer now.
Just curious if anyone may have any ideas that I may be over looking ? Or if anyone has a PS board for the SX 980 laying around that they would like to sell.
Thanks, Joe