HP 750c Service Manual - Page 135

Service Tests The following is a list of all internal service tests available in the plotters. Instructions for entering the service tests menu are given on page 8Ć20. 1 EEROM ' page 8Ć21 The purpose of this test is to clear or test the EEROM. 2 EEROM Clear Counters ' page 8Ć22 The purpose of this test is to reset the counters of the EEROM after periodic preventive maintenance has been performed. 3 EEROM Model Type ' page 8Ć23 The purpose of this test is to set the correct plotter model (not applicable to the DesignJet 700). This test also allows you to view (get) which plotter model is currently set. 4 MIO ' page 8Ć24 The purpose of this test is to check if the MIO card is present and verify its functionality. 5 Main PCA ' page 8Ć25 The purpose of this test is to do an extended functionality check of the internal circuits of the main PCA which are not involved with any other board. 6 MainĆCarriage Com ' page 8Ć26 The purpose of this test is to check all circuits involved in communicating between the main PCA and the carriage. 7 Carriage ' page 8Ć27 The purpose of this test is to check the internal circuits of the carriage PCA. 8 Thermal Control ' page 8Ć28 The purpose of this test is to verify the functionality of the sense resistors and any associated electronics. 9 TTOE ' page 8Ć29 The purpose of this test is to calibrate the Thermal TurnĆOn Energy for each cartridge. 10 Pen Continuity ' page 8Ć30 The purpose of this test is to check for proper interconnection between the cartridge(s) and the carriage. 11 Pen ID ' page 8Ć31 The purpose of this test is to check the pen ID and the resistance values. C4705-90000 Troubleshooting 8-17