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49.4CF1 = gen firmware error- Common problem on LJ9000 series. most likely a corrupt file has been sent to print, How to Clear- switch printer OFF if the net card is not built into the formatter- then unscrew and remove - remove all network/USB points from printer and then cycle the power- leave the printer disconnected from network and allow to reach ready state( If the machine still shows error- read below) if the machine does clear and reach ready then the error is with a bad file in the Print Spooler Que and may still need to be cleared from the print que (on the PC). If the error does not clear then you may need to Reset the machine - to perform a cold reset. Switch power ON- Wait until Memory Check is Running( lots of asterisks on screen) whilst the mem check is running press and HOLD the green Tick button, Hold until all Three Heartbeat lights have come on together- let go of the tick button use the scroll buttons to navigate down to Cold Reset select and press tick cold reset is now performed- if this doesnt clear your issue then please contact your service Department and inform them that a new formatter may well be required-this repair can be completed using Belmonte Business Equipment.co.uk
->Turned off printer ->Press STOP / RESET and hold, then press and hold the POWER button. ->While POWER button is pressed, release the STOP / RESET, then press the STOP / RESET 2 times in a state of the power button is pressed. ->Release both buttons simultaneously. ->The computer will detect a NEW DEVICE, Ignore it ..... ->This situation indicates the printer which Error P07 is in a state SERVICE MODE and ready to reset with software.
Do you have any flashing codes on the machine? I have seen empty toner cartridges with flakey chips on them cause that problem. Seems they run out of ink and the chip doesnt know what message to send and they just never come to ready.
this problem is usually caused by an eio card in the printer, ( jet direct card or hard disk), first thing to do is to remove these cards and reboot with only the power cable connected to the printer, once this reboots if the printer reaches a ready state print a test page directly from the printer, if this prints fine, then the actual printer hardware is fine, then it is a matter of rebooting with the jet direct installed, if the printer hangs problem with the card needs replaced, if this works fine, them do the same thing with the hard disk,
With the power off press and hold the cartridge cleaning button and the paper feed button. While holding the 2 buttons turn the power on. When the light for paper feed begins to flash let go of the buttons and immediately press and hold the cartridge cleaning button for at least 10 seconds. The unit will cycle then go to ready. The problem is that the counter for the waste ink cleaning pad has reached the limit.
I am not 100 percent sure what is happening to your machine after it comes to ready, but I will offer some thoghts.
If it comes to ready and then goes back to a low heat situation. It very well could be the board if it doesnt maintain heat.
Now that being said, once a coiper comes to ready and reaches full heat, it will switch over to pulsating the heat roller, not staying on fully all the time. That is how fusers are designed. Full on until they reach operating temperature, then pulsating to maintain the rollers heat level.
If you are having a problem with the image not fusing to the paper, you may have an issue with the pressure roller not making good contact with the heat roller.
There may be a software setting that needs adjusted to increase the fuser operating temperature.
The flickering heat rod, once the machine reaches ready, seems appropriate.
If you want more of an idea, can you be more specific as to whether the machine is faulting out with an under heating situation, or is the image not fusing to the paper properly?