I am troubleshooting a Carver M-500T that was reported to have no output.
I started at the power supply, and things were looking OK (outside of a slight voltage increase from what is listed in the schematic), until I got to Q405 and Q406. Q406 is measuring +46.8V when it should be -37.5V based on the schematic. Is this a typo? The relay in the unit is not engaging and this threw a huge red flag. I pulled and checked D402 and it measures fine. Before I go down a rabbit hole I just want to know if this is correct....
I started at the power supply, and things were looking OK (outside of a slight voltage increase from what is listed in the schematic), until I got to Q405 and Q406. Q406 is measuring +46.8V when it should be -37.5V based on the schematic. Is this a typo? The relay in the unit is not engaging and this threw a huge red flag. I pulled and checked D402 and it measures fine. Before I go down a rabbit hole I just want to know if this is correct....