HP LaserJet Enterprise M552 - Page 25

Figure 2-27 Open the Pre-boot menu .............................................................................................................................. 118
Figure 2-28 Pre-boot menu .............................................................................................................................................. 119
Figure 2-29 Access the administration menu .................................................................................................................. 120
Figure 2-30 Access the diagnostics menu ........................................................................................................................ 120
Figure 2-31 Open the screen test ..................................................................................................................................... 121
Figure 2-32 Blue vertical gradient screen ........................................................................................................................ 121
Figure 2-33 Open the touch test ...................................................................................................................................... 125
Figure 2-34 Touch the white grid ..................................................................................................................................... 125
Figure 2-35 Verify the mark ............................................................................................................................................. 126
Figure 2-36 Open the softkey test ................................................................................................................................... 127
Figure 2-37 Touch the Home button ................................................................................................................................ 127
Figure 2-38 Successful test .............................................................................................................................................. 128
Figure 2-39 Open the backlight test ................................................................................................................................. 129
Figure 2-40 Open the sound test ...................................................................................................................................... 130
Figure 2-41 Open the sound test ...................................................................................................................................... 131
Figure 2-42 Open the sound test ...................................................................................................................................... 132
Figure 2-43 Touchscreen blank, white, or dim (no image) .............................................................................................. 134
Figure 2-44 Touchscreen is slow to respond or requires multiple presses to respond ................................................... 135
Figure 2-45 Touchscreen has an unresponsive zone ....................................................................................................... 136
Figure 2-46 No control panel sound ................................................................................................................................. 137
Figure 2-47 Home button is unresponsive ....................................................................................................................... 138
Figure 2-48 Hardware integration pocket (HIP) is not functioning (control panel functional) ....................................... 139
Figure 2-49 Engine test button ........................................................................................................................................ 144
Figure 2-50 Defeating interlocks (front door) .................................................................................................................. 145
Figure 2-51 Defeating interlocks (right door; right side) ................................................................................................. 146
Figure 2-52 Defeating interlocks (right door; left side) ................................................................................................... 146
Figure 2-53 Printer base, sensors and switches block diagram ...................................................................................... 161
Figure 2-54 1x550-sheet paper feeder, sensors and switches block diagram ............................................................... 162
Figure 2-55 Document feeder, sensors block diagram .................................................................................................... 162
Figure 2-56 Printer base cross section diagram .............................................................................................................. 163
Figure 2-57 1x550-sheet paper feeder cross section diagram ....................................................................................... 164
Figure 2-58 DC controller PCA .......................................................................................................................................... 165
Figure 2-59 Formatter PCA ............................................................................................................................................... 167
Figure 2-60 Formatter PCA ............................................................................................................................................... 168
Figure 2-61 1x550-sheet paper feeder PCA .................................................................................................................... 169
Figure 2-62 Scan control board PCA ................................................................................................................................. 170
Figure 2-63 External plug and port locations .................................................................................................................. 171
Figure 2-64 Main assemblies, printer base (1 of 2) ......................................................................................................... 172
Figure 2-65 Main assemblies, printer base (2 of 2) ......................................................................................................... 173
Figure 2-66 PCA locations (printer base) ......................................................................................................................... 175
Figure 2-67 General timing chart ..................................................................................................................................... 176
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