Hey all, I started by having a rig that was blowing two fuses on the power supply board when powered on. I changed C8, C9, and D1-D4, R12,R15,R21. That made fuses stop blowing, but now I have panel lights only on the dim setting, and it also made my tuning needle jump to a specific location when clicked to AM or FM. No relays click, no static or noise when running.
Since then, I went ahead and recapped the rest of the power supply board. Testing all pins 1-15...
1= 16.8mV
2= 18.3mV
3= -66mV
4= -52mV
5= -16mV
6= 4.46V
7= 0
8= 12.58V
9= -11.32V
10= -49.8V
11= -20.8V
12= 0
13= 31.18V
14= 49.4V
15= 22.46V
They seem legit as far as I could tell. I flipped it over and started to tool around a bit and noticed only two things that made me go hmm. Pin 12 on the protection board (AWM 062) appears to WANT 7.5V on AC unless I'm mistaken?? I am reading 0.13V on AC.
Otherwise, the power amp board (032C) I read only 35V on pins 8&9 as they appear to want 50V. Not sure that's within tolerance. This is all running under a Dim bulb tester, and im very new at all this. Please tell me im onto something. Any ideas??! Thanks ahead of time.
Since then, I went ahead and recapped the rest of the power supply board. Testing all pins 1-15...
1= 16.8mV
2= 18.3mV
3= -66mV
4= -52mV
5= -16mV
6= 4.46V
7= 0
8= 12.58V
9= -11.32V
10= -49.8V
11= -20.8V
12= 0
13= 31.18V
14= 49.4V
15= 22.46V
They seem legit as far as I could tell. I flipped it over and started to tool around a bit and noticed only two things that made me go hmm. Pin 12 on the protection board (AWM 062) appears to WANT 7.5V on AC unless I'm mistaken?? I am reading 0.13V on AC.
Otherwise, the power amp board (032C) I read only 35V on pins 8&9 as they appear to want 50V. Not sure that's within tolerance. This is all running under a Dim bulb tester, and im very new at all this. Please tell me im onto something. Any ideas??! Thanks ahead of time.