50.x Errors

HP Color LaserJet 4600, 4650, and 5500 Series Printers - 50.x Errors Some 50.x fuser errors are caused when media that is not within specifications is used. With all fuser errors, inspect the fuser for media that has been melted or burned and then wrapped around the fuser. This can cause it to overheat and/or keep it from rotating. The fuser may still operate once the wrapped media is removed from the fuser. If the fuser is damaged from using media that does not meet the printer's specifications in this way, it is not covered under the printer's warranty or service agreement.

The 50.X errors include the following:

50.X Fuser Error
50.X description

50.1 Fuser Error
Low fuser temperature

50.2 Fuser Error
Fuser warm-up service

50.3 Fuser Error
High fuser temperature

50.4 Fuser Error
Voltage mismatch

50.5 Fuser Error
Inconsistent fuser

50.6 Fuser Error
Open fuser

Part description
Part numbers for the 4600
Part numbers for the 4650
Part numbers for the 5500

Fuser 110V
C9660-69002
RG5-7450-000CN
C9656-69001

Fuser Power Supply PCB* (100-127volt)
RG5-6399-000CN
RG5-6399-000CN
RG5-6801-000CN

DC Controller*
RG5-6391-100CN
RG5-7470-000CN
RG5-6850-060CN

NOTE: Before sending any additional parts, replace the fuser first. Replacing the fuser solves most 50.x errors. The fuser is a customer-installable consumable and does not require a technician onsite

Verify the power source. Remove the printer from surge protectors or a UPS.

Check for any jammed media.

Check for a non-HP fuser.

For 50.4 errors only, verify that the fuser has the correct voltage match for the printer. See Figure 1 to identify an 110v and 220v fuser. (Note the differences in the first four numbers). If the correct voltage fuser does not clear the error, replace the fuser first followed by the Fuser Power Supply PCB.

Figure 1: Fusers

Reseat the fuser.

Technician repair instructions
To troubleshoot 50.1 - 50.6 Fuser Errors (after replacing the fuser), do the following:

Turn the printer off and allow it to cool down and remove the fuser.

Check the connector J1034 that connects the fuser and the printer. Replace the connector if it is damaged.

Reinstall the fuser and turn the printer on again. If this does not clear the message, go to Step 4.

Turn the printer off and remove the fuser. Measure the resistance between the connector pins on the fuser. If resistance does not meet the following guidelines, replace the fuser again.

J1034-5 to J1034-6: 300 - 500 KOhms

J1034-1 to J1034-2: less than 1 KOhm

Check for continuity between connector pins J1034-4 and J1034-2. If there is no continuity, replace the fuser.

Replace the fuser power supply PCB.

Replace the DC controller PCB.

Calibrate the printer through the control panel after replacing the DC controller.

© 2005 Hewlett-Packard