Mallinckrodt Nellcor N-20PA Service Manual page 31

4.7.1 Installing Batteries
4.7.2 Loading/Clearing Printer Paper
4.7.3 Setting Date and Time
The N-20PA operates on four 1.5-V alkaline "C" cell batteries. Do not use
off-the-shelf rechargeable batteries; this type of battery can cause the Low
Battery indicator to be inaccurate. To install the batteries:
1. Remove the battery access door by pressing the battery compartment access
door latch.
2. Install four alkaline "C" cell batteries. Be sure to observe the polarity
indicator sticker.
3. Replace the battery cover access door.
The N-20PA uses a thermal paper that can show printed characters on one side
only. Make sure that the paper roll is correctly installed; always refer to the
graphical instruction label found on the paper roll. To load the paper:
1. Press down and outward on the top of the paper compartment door to remove
it.
2. Feed the paper into the paper compartment slot; refer to the graphic label for
orientation.
3. Press and hold the ADV button until the end of the paper appears at the paper
exit slot.
4. Replace the paper compartment door.
If the paper jams either during the loading process or during printing, proceed as
follows:
1. Remove both the paper door and the printer-head access cover.
2. Firmly grab and pull the paper roll backward—out and away from the print
head—and observe the print head access to determine whether or not the
paper escaped from the jammed position.
3. If paper remains jammed between the printer head and printer, press the
ADV button; the jammed paper may work its way out. If the paper remains
jammed, and the printer drive does not advance the paper, manually advance
the drive gear on the side of the printer to free the paper.
If these attempts fail to free the jammed paper, remove the printer from the unit
to gain full access (see Section 5.3, N-20PA Disassembly Procedure).
The following code letters and numbers appear in both Oxygen Saturation and
Pulse Rate display fields. The symbol "xx" represents information in the
Oxygen Saturation display field and "yy" represents information in the Pulse
Rate display field.
1. To set the date and time: Remove any sensor from the instrument.
2. Switch on the N-20PA and allow the unit to run POST.
Troubleshooting
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