HP 750 - Manual (Page 149)

750C
750C
Plus
755
CM
Troubleshooting C4705-90000 8-31
11. Pen ID
The purpose of this test is to check the pen ID and the resistance values.
Perform the penID test as follows:
1 In the Service Tests submenu, scroll to 11 Pen ID" and press Enter.
SERVICE TESTS
11 Pen ID
2 The Black PenR = ##.## / id = c8001" message is displayed onthe frontĆpanel.
If the value (##.##) of the Black Pen R is between 26.0 and 31.5 then press Enter.
If the value of the Black Pen R is not between 26.0 and 31.5 then the cartridge has failed the
test. To resolve the problem, try one of the following:
1 Check the part number of the cartridge. Isit the correct one for thisplotter?
2 Clean the interconnect pad in the carriage or the cartridge that failed the test.
3 Replace the cartridge that failed the test.
4 Perform the pen continuity test ' page 8Ć30.
5 Replace the carriage ' page 6Ć34.
3 Use the Arrow buttons to select the next cartridge that needs to be tested.
As each color cartridge is tested, the Pen R and id value is displayed on the front-panel. If the
Pen R values given are not between 23.3 and 32.8, then, to resolve the problem, try one of the
troubleshooting tips given in step 2.
4 Press the Enter buttonwhenthe test has beencompleted.