HP Designjet 4000 Printer series - Manual (Page 213)

The problem is a paper jam (paper stuck in the printer)
When a paper jam occurs, you will normally see the Possible paper jam message in
the front panel, with one of two error codes:
●
81:01 indicates that paper cannot advance into the printer.
● 86:01 indicates that the printhead carriage cannot move from side to side.
Check printhead path
1.
Switch off the printer using the switch at the rear.
2. Open the window.
211
The
problem
is w
ith the
paper