Service manual

2. TROUBLESHOOTING
Service Manual BSM-4100 2.7
SpO
2
Problems
Problem Possible Cause/Criteria Action
NK SpO
2
board or motherboard is faulty or
contact between them is poor if the ECG,
impedance method respiration and NIBP
measurements are enabled.
Check the connection. Replace
the NK SpO
2
or ECG input block
with a new one* if the
connection has no problem.
The instrument does not
recognize the NK SpO
2
connection cord connected to
the SpO
2
socket on the
instrument.
DPU board is faulty if the ECG, impedance
method respiration and NIBP measurements
are disabled.
Replace the faulty board with a
new one.
PULSE SEARCH message is
displayed even after the probe
is replaced and attachment site
is changed.
NK SpO
2
board is faulty. Replace the faulty board with a
new one.
WEAK PULSE message is
displayed even after the probe
is replaced and attachment site
is changed.
NK SpO
2
board is faulty. Replace the faulty board with a
new one.
SpO
2
module (Nellcor) is faulty or connection
between the motherboard and SpO
2
module is
poor if this error message is displayed, except
in the following case.
Check the connection. Replace
the faulty module with a new one
if the connection has no problem.
SpO2 MODULE ERROR
message is displayed.
If the Nellcor SpO
2
connection cord is
connected to or disconnected from the SpO
2
socket just after the instrument is turned on, it
displays this error message at the power on
check.
Connect the SpO
2
connection
cord and turn off the instrument.
Turn on the instrument 10
seconds or more after the power
is turned off.
* ECG input block repair kit is required when one of the ECG RESP1 board, ECG RESP2 board, ECG RESP3 board
and motherboard has a failure. Refer to “Board Compatibility” in Section10 “Internal Switch Setting and Board
Compatibility”.