HP Indigo 7500 Blanket Creep Troubleshooting - Page 2

Table of contents 1 Overview ...1 Special jigs and tools ...1 2 Diagnostics workflow ...2 3 Procedures ...3 Identifying blanket creep...3 No blanket creep found...3 Blanket creep found...3 Validating press level ...4 Checking if the blanket itself is the source...5 Checking if first transfer is the source...5 Cold start test...5 Pause mode test ...7 Results of first transfer test...7 Checking if second transfer is the source ...8 Results of second transfer test...10 Solutions ...10 Solution Procedure...10 ITM bearings are the source of the blanket creep ...11 PIP bearings are the source of the blanket creep ...11 Impression bearings are the source of the blanket creep ...12 4 Revision history and confidentiality notice...13 Revision history...13 Printing instructions...13 Confidentiality notice...13 ii