Xerox 8500DN Service Manual - Page 115

Error Messages and Codes 8400 PEST Description 8500/8550/8560 PEST Description 37,056.47: Power supply -50 volt under limit. Power supply -50 volt under limit. 37,057.48: Power supply +15 volt over limit. Power supply +15 volt over limit. 37,058.40: Power supply +15 volt under limit. Power supply +15 volt under limit. 37,059.41: Power supply -15 volt over limit. Power supply -15 volt over limit. 37,060.42: Power supply -15 volt under limit. Power supply -15 volt under limit. 37,061.43: Power supply high switch will not activate. 12, 15, and 50 volt missing. This may be due to a short or disconnected power supply reset line. Power supply +5 volt over limit. 37,062.44: Vss measurement too low. The Printhead power cable may be disconnected. Power supply +5 volt under limit. NOTE Later version Printheads feature a lock connector on the printhead data cable 37,063.45: Vpp measurement too low. The Printhead power cable may be disconnected. NOTE Later version Printheads feature a lock connector on the printhead data cable Power supply high switch will not activate. 12, 15, and 50 volt missing. This may be due to a short or disconnected power supply reset line. 37,064.46: Vss measurement too low. The Printhead power may be disconnected. 37,065.47: Vpp measurement too low, Printhead power may be disconnected. Wave amp drive cable may be damaged or disconnected at head driver board or wave amp board. 37,066.48: The Wave Amp may be shorted. Check the Wave Amp drive cable (lifted ends of conductors). Troubleshooting Procedure for Power Supply Step Questions and Actions 1 Run the Voltages check test. Did the test pass? 2 Check the Printhead power cable. Is the wiring damaged or not connected? Yes Go to Step 2. Reseat or replace the wiring. No Replace the Electronics Module. Replace the Wave Amp. Phaser 8400/8500/8550/8560 Color Printer Service Manual 3-47