DC420 X flashing in display + paper symbal

[gregoryk]

Hi frank. why you dont just replace the battery to keep your mind in peace?
Ok! you can remove the terminals bat if the battery is broken the problem will come back after a while

[axyun]

I probably would have changed it if I had one. I need to locate one with th camparable contacts to solder on. I will look into it. I used to have several similar Sharp batteries but threw them out as they were from very old models.Frank

[tech9]

Machine in constant warmup mode. Job icon may or maynot be in upper right corner of screen X may or maynot be moving across screen.

Cause:


MFSYS board has locked up.

Solution:


Power machine down. Access MFSYS board unplug PJ 300&303 OLD STYLE 300&480 NEW STYLE (3 in 1) Power machine on it should go in to a NOT READY TO COPY MODE after warming up. In this mode you can get in to diagnostics. Get into diag DC 131 IOT NVM INITIIALIZATION. Goto 20-92
(MFSYS reset) Do not reset yet. At this point go back to the MFSYS board plug in PJ 303/480 then PJ 300. Now go back and do the reset on 20-92. Now exit from diagnostics popo. machine should come up ready to copy after warming up.

[axyun]

Thanks Tech9. I will give it a try. The X is walking across screen and there is the paper symbol in the upper right hand corner. I was able to get into paper supply mode by disconnecting the ribbon cable to main board. The paper supply status showed that the #1 tray was not in machine. Frank