HP CM3530 Service Manual - Page 406
Power subsystem, Power-on checks, Power-on troubleshooting overview
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Power subsystem Power-on checks The basic product functions should start up when the product is plugged into an electrical outlet and the power switch is pushed to the on position. If the product does not start, use the information in this section to isolate and solve the problem. Power-on troubleshooting overview Turn on the product power. If the control panel display remains blank, random patterns display, or the normal initialization display does not appear, perform power-on checks to find the cause of the problem. Power-on sequence ● 00 seconds: power on button LED (+5 VA from LVPS) ● 02 seconds: control-panel display with HP logo (check USB cable from ICB, 12 v from formatter) ● 04 seconds: output bin LED (+5 v from SCB) ● 06 seconds: scanner lamp and initialization (24 v from LVPS) ● 10 seconds: ADF initialization (check ADF cable) ● 12 seconds: LVPS fan (right rear corner, 24 v from LVPS) ● 22 seconds: engine initialization NOTE: The LVPS includes an over current and over voltage crowbar circuit. If the power supply does not come on, unplug the power cord, wait five minutes, and then plug the power cord in and try turning the product on again. If the fan and main motor are operating correctly, the next troubleshooting step is to isolate print engine, formatter, and control panel problems. Perform an engine test (see Engine-test button on page 386). If the formatter is damaged, it might interfere with the engine test. If the engine-test page does not print, try removing the formatter and then performing the engine test again. If the engine test is then successful, the problem is almost certainly with the formatter, the control panel, or the cable that connects them. If the control panel is blank when you turn on the product, check the following items. 1. Make sure that the product is plugged directly into an active electrical outlet (not a power strip) that delivers the correct voltage. 2. Make sure that the power switch is in the on position. 3. Make sure that the fan runs briefly, which indicates that the power supply is operational. 4. Make sure that the control panel display wire harness is connected. 5. Make sure that the formatter is seated and operating correctly. Turn off the product and remove the formatter. Reinstall the formatter, and then verify that the heartbeat LED is flashing. 6. Remove any HP Jetdirect or other EIO cards, and then try to turn the product on again. 376 Chapter 7 Solve problems ENWW