29-01-2017, 06:44 AM
Hi Hayden,
Thanks for the update. Yes, pulling it apart is all a bit of a pain. I did not actually do that until Thursday.
However if you just want to test C10, try de-soldering one or both ends, or if you want to check the whole IC2D area, just de-solder one or both ends of D12. That worked for me. If it turns out to be C10, you could probably just leave it there and solder a new 0.1 uF capacitor between Pins 12 and 13 of IC2 (LM339).
C10 is the closest connection to Pins 12 and 13. D12 is not hard to find by tracing voltages and tracks from Pin13 of IC1 at the top end and Pin 13 of IC2 at the bottom end.
Good luck.
Lew.
PS I replaced C10 and the 4 component-side electrolytics yesterday, and put it all back together. It is working fine. I'm hoping to tackle the second D-3800 this morning.
Thanks for the update. Yes, pulling it apart is all a bit of a pain. I did not actually do that until Thursday.
However if you just want to test C10, try de-soldering one or both ends, or if you want to check the whole IC2D area, just de-solder one or both ends of D12. That worked for me. If it turns out to be C10, you could probably just leave it there and solder a new 0.1 uF capacitor between Pins 12 and 13 of IC2 (LM339).
C10 is the closest connection to Pins 12 and 13. D12 is not hard to find by tracing voltages and tracks from Pin13 of IC1 at the top end and Pin 13 of IC2 at the bottom end.
Good luck.
Lew.
PS I replaced C10 and the 4 component-side electrolytics yesterday, and put it all back together. It is working fine. I'm hoping to tackle the second D-3800 this morning.