On Wed, Aug 10, 2022 at 06:28 AM, alfonso wrote:
thanks for the info but unfortunately my power supply put on another 8920 works correctly (at least when I tested it a while ago) now I also have other problems and, perhaps because of me. I am angry with myself.
10/08/2022 02:34, zl1cvd wrote:
I have seen 2 causes for this type of fault.
- Faulty power supply - check all power rails are the correct voltages. These units all suffer from dry / cracked caps in power supply. The cure is to replace all electrolytic caps in the power supply with equivalent value 105C types. For any fault in 8920, 8921, 8922, 8924, E8285A, 8935(E6380/E6381)? you should first check power supply and output of any regulator board - sometimes separate to power supply.
- Faulty A19 Measurement unit - refer to 8920 CLIP for full circuit of the measurement unit.
ERROR 223 error is not caused by the power supply PSU, it should be caused by the failure of the A19 board. You can try to replace A19 to troubleshoot, and the failure of A19 is likely to cause the A7 board to fail as well.
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Regards,
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Don Box