Lexmark T620 Service Manual - Page 174

4069-5XX/7XX Disabling Download Emulations Error Code 964: Download Emulation CRC Failure. Checksum failure detected in the emulation header or emulation file. Error Code 965: Download Emulation Outdated. Time stamps indicate the download emulation and RIP code are incompatible. To help resolve Download Emulation problems the following steps are necessary to instruct the printer to POR without activating any download emulations. To Disable the Download Emulation: 1. Turn the printer off. 2. Press and hold the Go and Menu buttons. 3. Turn the printer on and release the buttons once "Performing Self Test" displays. - Once the printer is idle, the emulation can be downloaded again. 4. Program the download emulation into the code overlay card assembly again. 5. If these steps do not resolve the problem, replace the code overlay card assembly and download the emulation again. Duplex Tests Duplex Quick Test This test is used to verify that the Duplex Option Top Margin is set correctly. This test prints a duplexed version of the Quick Test Page that can be used to adjust the Top Margin for the backside of the duplexed page. You can run one duplexed page (Single) or continue printing duplexed pages (Continues) until Return/Stop is pressed. The paper you choose to print the page on should be either Letter or A4. To run the Duplex Quick Test: 1. Select Duplex Quick Test from the menu. 2. Select Single or Continuous. 3-8 Service Manual