General Troubleshooting 4-25Check Heaters MenuReservoir Heater, Jetstack Left Heater, Jetstack Right Heater, Paper Preheater,Drum Heater, Ink Melt 1 (yellow) Heater, Ink Melt 2 (cyan) Heater, Ink Melt 3(magenta) Heater, Ink Melt 4 (Black) HeaterThis test sequentially applies power to each of the heaters to verify the relationship betweenpower applied and heating/cooling and to check the current drawn by each heater. Test resultsare derived for each heater. When information about a specific heater is requested, all of theheaters are tested as a group, and then the data for the specified heater is reported.R# DefinitionTypicalValue Actions0 Initial Temperature(deg c)MFGOnlyReports the temperature prior to application ofheater power.This value may indicate how to interpret thefollowing values as the temperature "bump"may be a different shape depending on initialtemperature. In particular the printhead onlyreports a constant (room temperature), value ifthe temp is < 32 o C.1 Average AC Current(amps)MFGOnlyReports the difference from baseline ACcurrent during the specified heatinginterval.For heaters with multiple elements inparallel, a significantly different value canindicate a partial failure. The nominal valuescould change with operating hours.2 Average VoltageChange (volts)MFGOnlyReports the difference from baseline AC voltsduring the specified heating period. Normallythe changes should be small. Negativechanges for high current heaters indicate theload provided by the system is pulling down theexternal AC supply, indicating a more robustsupply may be required.3 Response Time(ms)MFGOnlyReports the time after power is applied to thespecified heater that the temperature begins torise. For printhead temperatures < 32 o C, thistime becomes the time at which thetemperature reaches 32 o C. This is thepropagation time of the heat pulse through themechanism from the heating element to thecorresponding thermistor.4 End HeatingTemperature (deg c)MFGOnlyReports the temperature at the end of thespecified heating interval. This may not be theactual temperature for printhead temperatures< 32 deg (normally the temp would be >32 deg). For the linear portion of the heatingcurve (i.e. quite a ways from the setpoint), theend temp minus the initial temp is theparameter of interest.
