HP Color LaserJet CM4730 Service Manual - Page 552

Table 6-2 Control-panel messages (continued) Control panel message Description 56.XX ERROR To continue turn off then on A printer error has occurred. 56.01 = Input device 56.02 = Output device 57.XX ERROR To continue turn off then on 58.XX ERROR To continue turn off then on A printer fan error has occurred. 57.01 = Delivery fan 57.03 = Sub power supply fan 57.04 = Cartridge fan 57.05 = Duplex fan 57.06 = Control fan 2 57.07 = Control fan 1 57.08 = ETB fan 57.0A = Power supply fan 57.09 = Fuser fan A memory tag error was detected. XX Description 58.03 = Memory controller PCB 58.04 = Memory controller PCB power supply 59.XY ERROR To continue turn off then on A printer motor error has occurred. X Description 0 = Motor error 1 = Motor startup error 2 = Motor rotation error 3 = Fuser motor startup error 4 = Fuser motor rotation error 5 = Image drum motor startup error 6 = Image drum motor rotation error Recommended action 05 errors 1. Upgrade the DC controller PCB firmware. 2. Replace the DC controller PCB firmware. 1. Turn the MFP off and then on. 2. Remove all input and output devices and reinstall them. 3. Check all connectors to the input/ output devices that are installed. Replace any damaged connectors. 1. Turn the MFP off and then on. 2. Check the fan for obstructions. 3. Ensure the fan rotates. 4. Ensure the fan connector is seated properly. 5. Replace the indicated fan. 1. Turn the MFP off and then on. 2. Check the connectors on the memory controller (J4001, J9630) and the DC controller PCB (J1021). 3. Replace the memory PCB. 4. Replace the E label contacts. 1. Turn the MFP off and then on. 2. Note: This message might also display if the transfer unit is missing or incorrectly installed. Ensure that the transfer unit is correctly installed. ETB motor error 1. Run the component test to verify that the ETB is working correctly. 2. Clean the ETB unit intermediate connector J4613. 532 Chapter 6 Problem solving ENWW