On the off chance that anyone else has encountered the problem I'm experiencing...
The voltage at the test point TP1 for the AGC circuit is supposed to be calibrated to -1.8V. I'm experiencing an intermittent problem where sometimes I get a reading and am able to adjust the AGC pot, but then it switches to 0.57V and the turning the pot has no effect on the voltage. I thought it was oxidation on the cinch connector between the power supply board and the main board, since it seemed like pressing against the back of the power supply board restored the correct voltage. But cleaning the connections didn't solve it. I need to go back and trace the circuit to see if I can find the issue, but I'm open to suggestions in the meantime.
The voltage at the test point TP1 for the AGC circuit is supposed to be calibrated to -1.8V. I'm experiencing an intermittent problem where sometimes I get a reading and am able to adjust the AGC pot, but then it switches to 0.57V and the turning the pot has no effect on the voltage. I thought it was oxidation on the cinch connector between the power supply board and the main board, since it seemed like pressing against the back of the power supply board restored the correct voltage. But cleaning the connections didn't solve it. I need to go back and trace the circuit to see if I can find the issue, but I'm open to suggestions in the meantime.
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.