Hi, just thought I would see if anyone here has ever done a repair to an 8050A that is showing the +1 in all modes. Note: during the power on cycle, I do get zeros displayed, then they go away.
New Note: This unit does not have a battery. Line voltage only.
As I understand, +1 to the left side of the display is the OL indicator. In my testing, the comparator is sending the signal to the OL pin on the microprocessor in a periodic pulse.
I don't visually see anything bad or leaking caps.
One issue I did find, was my +13 volt rail on TP3 TP2, if I remember correctly, was reading just over 11 volts. This seems too low, so I'm suspecting the filter caps because I'm getting just over +14 and -14 volts at the bridge rectifier.
Could this be the main cause? I just don't want to have to pull all the caps and find I missed something.
Any ideas would be helpful.
Thanks.