HP Indigo W7200 Charge Roller -- CA393-00080 Rev 07 - Page 3

1 Procedures Troubleshooting procedures for a charge roller. Troubleshooting customer-level issues To troubleshooting customer-level issues, see Charge Roller Operating Principles and Maintenance Guide (CA393-03440). Troubleshooting the high voltage connection failure It explains how to troubleshoot the high voltage connection failure. Overview The charge roller charges the PIP to -900 V. Before every print, the electrometer determines whether or not the PIP is higher than -600 V. If not, the "PIP Charge is below minimum limit" error appears. The "PIP Charge is below minimum limit" error can be caused by: ● PIP slipped from its holder ● PIP is positioned incorrectly ● Electrometer reading/calibration error ● The PIP is exposed to light (such as open doors or the writing head laser is on) ● PIP ground contact failure ● Charge roller contact failure ● Charge roller engage failure ● Writing head is not level ● CRU power needs to be reset Other charge roller errors can be caused when: ● Charge roller housing and brushes are dirty ● Charge roller needs to be replaced ● DCI needs to be replaced Checking the Systab IO values Follow these steps to check the systab IO values. Procedures 1