HP LaserJet 4250 Service Manual - Page 370
Firmware, LJ 4200/4300, Formatter, assembly, Power, supply, Dc controller PCA, PRINTER ERROR
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Table 7-7 Numerical printer messages (continued) Control panel message Description Recommended action appears only with a certain software program or print job, contact the software vendor for assistance. 5 If the message persists when using different software programs and attempting specific print jobs, disconnect all cables that connect the printer to the network or a computer. 6 Turn the printer off. 7 Remove all memory DIMMs or thirdparty DIMMs from the printer. (Do not remove the firmware DIMM in slot J1.) See Firmware DIMM (LJ 4200/4300 only). 8 Remove all of the EIO devices from the printer. 49.XXXX PRINTER ERROR To continue turn off then on A critical firmware error has occurred that caused the processor on the formatter to abort the operation. This type of error can be caused by invalid print commands, corrupt data, or invalid operations. In some instances, electrical noise in the cable can corrupt data during transmission to the printer. Other causes include poorquality parallel cables, poor connections, or specific software programs. Sometimes, the formatter itself is at fault, which is usually indicated by a 79 Service Error. After performing the actions above, procede with the following: 1 Turn the printer on. 2 If the error message disappears, reinstall each DIMM and EIO device individually, making sure to turn the printer power off and then on again as you install each device. To replace a DIMM, see Firmware DIMM (LJ 4200/4300 only). 3 Replace the DIMM or EIO device that caused the error message. 4 Remember to reconnect all of the cables that connect the printer to the network or computer. 5 If this error message persists, replace the firmware DIMM. See Firmware DIMM (LJ 4200/4300 only). 6 Replace the formatter assembly. See Formatter assembly . 49.24.02 printer error The printer has experienced a critical error. 1 Verify that the ribbon cables are fully seated in the connectors on the dc controller PCA. 2 Replace the power-supply assembly. See Power supply. 3 Replace the dc controller PCA. See Dc controller PCA. 4 Replace the formatter assembly. See Formatter assembly . 356 7 Troubleshooting