HP LaserJet Pro 300 Service Manual - Page 91

Reinstall the ITB Use this procedure to verify that the ITB is correctly reinstalled. 1. Use the control panel to print a Diagnostics page. See the complete version of the English service manual. 2. Verify that rows one through four, columns A through I (callout 1) contain hexadecimal numbers. If these rows and columns are all zero, ensure that the calibration sensor was correctly reinstalled. The sensor must be correctly positioned and fit securely against the chassis before the mounting screws are installed. See Figure 1-93 Remove the ITB (2 of 6) on page 64 and Figure 1-92 Remove the ITB (1 of 6) on page 64. Figure 1-98 Reinstall the ITB HP Color LaserJet PRO 400 Diagnostics Page Calibration Information Power-On Calibration : 15 Minutes Calibration Timing: 48 Hours Parameters 04 Color Density C MY K Contrast 0 00 0 Highlights 0 00 0 Midtones 0 00 0 1 Shadows 0 0 0 0 ENWW Removal and replacement procedures 67