HP LaserJet 4250 Service Manual - Page 373
Cooling, right, HP LaserJet 4250/4300/4350, Series, printers, Dc controller PCA, Power, supply
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Table 7-7 Numerical printer messages (continued) Control panel message Description PRINTER ERROR X Description To continue turn off then on 3 Cooling fan, right side (LJ 4250/4300/4350 only) or 4 Main cooling fan, left side 57.3 EP fan failure or 57.4 main fan failure Recommended action 57.3 Cartridge fan error (F2) 1 Reconnect the connector between the fan and the dc controller PCA (location J78). 2 Replace the fan. See Cooling fan, right side (HP LaserJet 4250/4300/4350 Series printers only). 3 Replace the dc controller PCA. See Dc controller PCA. 57.4 Main fan error (F1) 1 Reconnect the connector between the fan and the power supply. 2 Verify that the ribbon cables are fully seated in the connectors on the dc controller PCA. 3 Replace the fan. See Main cooling fan (left side). 4 Replace the power-supply assembly. See Power supply. 5 Replace the dc controller PCA. See Dc controller PCA. 57.7 duplex fan failure The cooling fan in the optional duplexer is not functioning. 1 Turn the printer off and then on. 2 Replace the duplexer. 58.X PRINTER ERROR For help press alternates with 58.X PRINTER ERROR To continue turn off then on A memory error has been detected. X Description 2 air-temperature sensor 3 Dc controller 4 power supply Turn the printer off and then on. 58.2 Air-temperature sensor 1 Turn the printer off and then on. 2 Reconnect the connector between the air-temperature sensor (the bar mounted across the main cooling fan on the left side of the printer) and the power supply (location J63). 3 Replace the air-temperature sensor. See Main cooling fan (left side). 4 Replace the power-supply assembly. See Power supply. 58.3 Dc controller 1 Replace the dc controller PCA. See Dc controller PCA. 58.4 Power supply 1 Replace the power-supply assembly. See Power supply. Display-message troubleshooting 359