HP 750 - Manual (Page 147)

700
750C
750C
Plus
755
CM
Troubleshooting C4705-90000 8-29
9. TTOE
The purpose of this test is to calibrate the Thermal TurnĆOn Energy for each cartridge.
Perform the TTOE test as follows:
1 In the Service Tests submenu, scroll to 9 TTOE" and press Enter.
SERVICE TESTS
9 TTOE
2 The Setting Voltages..." message is displayed on the frontĆpanel.
3 The plotter will automatically calibrate the black cartridge.
The Select a Position" message is displayed on the frontĆpanel. Use the Arrow buttons
toselect the cartridge that needs tobe tested.
4 Press the Enter button.
5 The Calibrating xxxx Pen" message is displayed on the frontĆpanel while the plotter
calibrates the cartridge.
xxxx represents the color of the cartridge that is being calibrated.
6 When the plotter has finished calibrating the cartridge, the TTOE Voltage #.## / Press
Enter" message is displayed on the frontĆpanel.
If the message
TTOE fail" is displayed on the front-panel, then the cartridge has failed the test.
To resolve the problem, try one of the following:
1 Clean the interconnect pad in the carriage or the cartridge that failed the test.
2 Replace the cartridge that failed the test.
3 Perform the pen continuity test ' page 8Ć30.
4 Replace the carriage ' page 6Ć34.
7 The Pen Voltage #.## / Press Enter" message is displayed on the frontĆpanel.
The pen voltage value (#.##) is for reference purposes only.