50.2 fuser error – HP Color Laserjet 4700, 4730 MFP, CP4005
Lots of factors can result in the HP color laserjet 4700, 4730 MFP, and CP4005 printers displaying a 50.2 fuser error. The 50.2 fuser error is a result of the machine not properly warming up before it’s time to print. The thermistors inside the fuser measure the temperature as the machine warms up. If after a certain amount of time the fusing unit, HP Color LJ 4700, 4730, and CP4005 Fuser, RM1-3131-000, Q7502A, has not reached its operating temperature the machine informs the end-user by displaying the 50.2 fuser error.
First thing to check is the power source. Make sure the machine is plugged straight into the wall outlet and not on a power strip with other devices.
Second is to just turn the machine off and back on. If the fusing assembly is still hot then maybe a little extra time will get it to its operating temp. might not be a permanent solution but will get you working for a time. The heating elements do get worn out and take longer to warmup. If you see this error happen more than once and turning it off and back on fixes it then I would get a fusing assembly on order and replace it as soon as possible because the 50.23 fuser error most likely continue to come back until it doesn’t work any more.
Third is to check the environment. Make sure the machine is not in an extreme cold environment as this can result in warmup issues. Or if you just brought it in from outside in the winter you should let the machine sit 2 to 4 hours before using.
HP Color Laserjet 4700, 4730 MFP, CP4005 Fuser Removal
Troubleshooting the HP Color Laserjet 4700, 4730 MFP, CP4005 50.2 Fuser Error
1. Turn the printer off and allow it to cool down.
2. Reinstall the fusing unit, and check the connector (J5001) that connects the fusing unit and the printer. Replace the connector if it is damaged.
3. Replace the fusing unit. HP Color LJ 4700, 4730, and CP4005 Fuser, RM1-3131-000, Q7502A
4. Check all cable connections to/from the DC controller.
5. Replace the low-voltage power supply PCB.
The 50.2 fuser error in the HP color laserjet 4700, 4730 MF, and CP4005 is one of those errors that will probably be seen more than other fuser errors because it’s a low temperature error rather than a high temperature error. Make sure you follow the above advice before you replace the fuser because it could be a simple problem like not having it plugged into a wall outlet. If the steps above don’t resolve the 50.2 fuser error then replacing the fusing assembly will most likely be needed. Below is a link to order the part and above in the article is the steps on how to replace it.
HP Color LJ 4700, 4730, and CP4005 Fuser, RM1-3131-000, Q7502A