HP 2300d Service Manual - Page 204
Printing an engine test, Open the I/O cover.
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Note Printing an engine test The engine test verifies that the print engine is functioning correctly. This test is very useful for isolating printer problems, because it does not involve the formatter. Because the engine test prints a full page of lines across the entire printable area, it is also useful for checking and adjusting registration. The engine test prints from the first tray found that contains media and can be activated with the formatter installed or removed. Make sure that the print cartridge is installed in the printer. Also, the print motor must be idle and the printer must be in standby mode. In order to produce an engine test print, media must be loaded into the printer. The printer prints the engine test page on media from the same tray as the previous engine test. If the engine test fails to print the engine test page, turn the printer off and then turn it back on. After a powercycle, the system checks for media in tray 2, then in tray 1, and finally in tray 3 (if installed). 1 Open the I/O cover. 2 Press the engine test button (callout 1). 12 Figure 108. Engine test button 202 Troubleshooting ENWW