OKI MPS9650c Error Codes list and solutions – Compatible Printer model: OKI MPS9650c – OKI MPS9650c Error Code description: Code: 001 Display: Service Call 001: Error Description: A heavy trouble of the CU substrate (defective substrate or power supply capacity shortage) was detected. Troubleshooting Guides: Is the error display reproducible? Is the error display reproducible? […]