01-31-2015, 03:21 PM
Heres an update on the sx1500td.
Installed the main amp. back in chassis.
Rebuilt the control amp.( all new caps) tested transistors out of circuit. they test good,so reinstalled them. Resistors ck. good. Changed the caps on the Mic. board. Changed the caps on the muting unit, and indicator unit. I did these boards 1 at a time with power up after each board was done. Still very low audio on FM.
So I now get FM but at very low sound out of speakers. I did try moving the speakers to the B & C plugs with no change. It is getting stations across the dial. I recleaned all the switches this is 3rd time. The AM band plays very good, and loud or quiet as you want with the vol. control.
So I still have something amiss in the FM section. But at least I'm now getting FM.
Any FM experts? I need advice what to check next. Thanks
Installed the main amp. back in chassis.
Rebuilt the control amp.( all new caps) tested transistors out of circuit. they test good,so reinstalled them. Resistors ck. good. Changed the caps on the Mic. board. Changed the caps on the muting unit, and indicator unit. I did these boards 1 at a time with power up after each board was done. Still very low audio on FM.
So I now get FM but at very low sound out of speakers. I did try moving the speakers to the B & C plugs with no change. It is getting stations across the dial. I recleaned all the switches this is 3rd time. The AM band plays very good, and loud or quiet as you want with the vol. control.
So I still have something amiss in the FM section. But at least I'm now getting FM.
Any FM experts? I need advice what to check next. Thanks
