Xerox 8500DN Service Manual - Page 177

General Troubleshooting This test scans the thermocouples and reports data on the current temperature with the goal of providing a picture of the current temperature state of the printer. All degrees are reported in Celsius. Temperature Status R# Definition 0 Reservoir Temp 1 Left Jetstack 2 Right Jetstack 3 Preheater Temp 4 Drum Temp 5 Ink Melt 1 Temp 6 Ink Melt 2 Temp 7 Ink Melt 3 Temp 8 Ink Melt 4 Temp Typical Value (8400) ~127.7o ~134o ~134o ~62o ~60o ~50o ~50o ~50o ~50o Typical Value (8500/ 8550/8560) Actions ~135.0o Reports the current temperature ~138o Reports the current temperature ~138o Reports the current temperature ~70 Reports the current temperature ~60o Reports the current temperature ~50o Yellow (usually off) ~50o Cyan (usually off) ~50o Magenta (usually off) ~50o Black (usually off) This test determines if the purge pump system (pump/hose/purge valve/ printhead) is operating normally. Purge Pump R# Definition Typical Value (8400) 0 Jetstack ~134o Temperature (deg) 1 Start Power (watts) Typical Value (8500/ 8550/8560) Actions ~138o Reports current jetstack temperature. If the temperature is above current threshold (120 deg), the test will abort and following results will report as 0. This avoids having ink extrude out of the faceplate and onto the drum, requiring both a wipe and a chase to clean up. Reports initial peak pumping power after pump power on. This reflects the inrush current to the pump motor. An unusual value could indicate a defective motor (windings/brushes/etc.). Phaser 8400/8500/8550/8560 Color Printer Service Manual 4-47