
NM2B
SOFTWARE UPDATE PROCEDURE
7.0 SOFTWARE UPDATE PROCEDURE
Software updates to the NARKOMED 2B are supplied as firmware in the form of a
replaceable EPROM. Figure 7-1 shows the location of the firmware chip on the processor
board and its orientation. Access to the chip requires removal of the monitor box top shelf,
and removal of the processor assembly cover plate.
Parts required: Firmware NM2B 4110476
(Version 2.04 includes the electronic version of the O
2
low pressure alarm
whistle for Canadian machines.)
7.1
Set the System Power switch to
STANDBY
and remove AC power from the
machine.
CAUTION:
ESD precautions must be observed when servicing any of the
assemblies inside the monitor box. It is also recommended that the
AC line cord be plugged into a test fixture which maintains the
electrical service ground connection to the machine while isolating
the line and neutral conductors.
7.2
Disable the three circuit breakers at the back of the monitor box by pulling out
each button with a knife or sharp object.
7.3
Remove the screws holding the monitor box top shelf. Lift the back of the shelf and
disconnect its ground wire from the chassis ground tab, then lift out the shelf.
7.4
On the power supply assembly, disconnect the AC power cable at J1, and
disconnect the battery power cable at J7.
7.5
Remove the screws holding the cover plate to the processor assembly, and remove
the cover.
7.6
Carefully remove the firmware chip, U33, from the processor board.
7.7
Insert the replacement firmware chip into the socket. Be sure that the index on
the chip is facing as shown in the illustration.
7.8
Reinstall the cover plate on the processor assembly.
7.9
Connect the cables that were previously removed from J7 and J1 on the power
supply assembly.
7.10 Reset the circuit breakers at the back of the monitor box.
Rev. C
7-1
Содержание Narkomed 2B
Страница 2: ...RETURN TO THIS MANUAL S TABLE OF CONTENTS RETURN TO CD ROM TABLE OF CONTENTS ...
Страница 18: ...RETURN TO THIS MANUAL S TABLE OF CONTENTS RETURN TO CD ROM TABLE OF CONTENTS ...
Страница 32: ...RETURN TO THIS MANUAL S TABLE OF CONTENTS RETURN TO CD ROM TABLE OF CONTENTS ...
Страница 240: ...RETURN TO THIS MANUAL S TABLE OF CONTENTS RETURN TO CD ROM TABLE OF CONTENTS ...
Страница 244: ...RETURN TO THIS MANUAL S TABLE OF CONTENTS RETURN TO CD ROM TABLE OF CONTENTS ...
Страница 306: ...RETURN TO THIS MANUAL S TABLE OF CONTENTS RETURN TO CD ROM TABLE OF CONTENTS ...