HP 4550 Service Manual - Page 235
SCANNER ERROR 4500, XY.ZZ, Table 7-3, Numerical printer error messages continued, CAUTION - 54 2 error
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Table 7-3 Numerical printer error messages (continued) 52 SCANNER ERROR (4500) -or- 52 PRINTER ERROR (4550) Description: Indicates that a scanner error has occurred. 53.XY.ZZ PRINTER ERROR Action: 1. Turn the printer off and on to reset the printer. 2. Verify connectors J551 on the beam detect PCB, J1103 on the scanner motor, and J1006 on the DC controller are fully seated and connected correctly. 3. Replace the laser/scanner unit. Description: Indicates a memory error. If a DIMM caused the error, the DIMM will not be recognized (configured). Action: 1. Verify that the DIMM is installed correctly. 2. Turn the printer off and on to reset the printer. X = MemoryType 0 = ROM 1 = RAM 3. Remove and replace the DIMM that caused the error. Y = Device Location 0 = Onboard 1 = DIMM slot 1 2 = DIMM slot 2 3 = DIMM slot 3 ZZ = Error Number 0 = Unsupported memory 1 = Unrecognized memory 3 = Failed RAM test 54.1 PRINTER ERROR Description: Action: Indicates that an internal power failure has occurred. 1. Turn the printer off, and then turn the printer back on. 2. Replace the high-voltage power supply. 3. Check the fuser to ensure jams have not occurred. CAUTION 54.1 errors can be caused by damaging the thermistor while clearing fuser jams. 4. Make sure there is not a fluctuation in the power supply to the printer. Check that the electrical specifications (see Chapter 1) are met. 5. Replace the low-voltage power supply. 54.2 PRINTER ERROR Description: Indicates that a problem exists with the carousel assembly. Either the carousel is not rotating or the sensor has failed. Drive motor (M3) provides drive for the toner cartridge carousel. If motion is not detected, a 54.2 error appears. M3 is a 6-phase stepping motor and receives its drive signal from J203 of the developing PCB. Photosensor PS10 monitors "movement" (and the position) of the toner cartidge carousel. Different width tabs (four tabs, one for each cartridge) on the left-end of the Action: 1. Turn the printer off and then on to reset the printer. 2. Open the color toner door and look for an obstruction. If necessary, remove the toner cartridges individually by manually releasing the carousel brake and rotating the carousel around to each cartidge position and removing the cartridges. Turn the printer off and on to reset the printer. (Continued on next page) (Continued on next page) C7085-90921 Chapter 7 Troubleshooting 233