Service manual

2. TROUBLESHOOTING
2.6 Service Manual BSM-4100
ECG and Respiration by Impedance Method Problems
Problem Possible Cause/Criteria Action
The setting, Number of electrodes, is set to a higher
number than the actual number of the electrodes.
Set the number of
electrodes correctly.
The electrode lead, ECG connection cord or patient
cable is faulty.
Replace the accessory with
a new one.
ATTACH ELECTRODES
message is displayed even
after each electrode contact
part of the electrode lead is
short-circuited.
ECG RESP1 board, ECG RESP2 board or ECG RESP3
board is faulty.
Replace the ECG input
block with a new one*.
The ECG RESP3 board is faulty if the monitoring lead
setting can be changed.
Replace the ECG input
block with a new one*.
The time constant setting
cannot be changed.
Motherboard, DPU board or ECG RESP3 board is
faulty if the monitoring lead setting cannot be changed.
Replace the ECG input
block or DPU board with a
new one*.
ECG RESP2 board, motherboard or DPU board is faulty
if the pacing spike detection setting, PACING REJECT,
is set to on.
Replace the ECG input
block or DPU board with a
new one*.
Pacing spike is not
detected.
ECG RESP3 board is faulty if the pacemaker rhythm is
not recognized in the 12 lead ECG interpretation.
Replace the ECG input
block with a new one*.
ECG RESP1 board is faulty if the ECG waveform at a
specified lead is displayed with a different sensitivity
from the sensitivity setting.
The ECG waveform is
displayed with a different
ECG sensitivity from the
sensitivity setting.
ECG RESP2 board or ECG RESP3 board is faulty if the
ECG waveform at all the leads is displayed with a
different sensitivity from the sensitivity setting.
Replace the ECG input
block with a new one*.
Monitoring lead setting
cannot be changed but the
time constant setting can
be changed.
ECG RESP1 board, ECG RESP2 board or ECG RESP3
board is faulty.
Replace the ECG input
block with a new one*.
ECG RESP3 board or motherboard is faulty if no 12
lead ECG waveforms are displayed in the 12 LEAD
window.
Display of 12 lead ECG
has something wrong.
ECG RESP1 board, ECG RESP2 board or ECG RESP3
board is faulty if a specified lead of the 12 lead ECG
waveforms is not displayed in the 12 LEAD window
Replace the ECG input
block with a new one*.
Electrode, electrode lead, ECG connection cord or
patient cable is faulty if the ECG waveform on the
screen has something wrong.
Replace the accessory with
a new one.
Respiration waveform is
not displayed.
ECG RESP1 board, ECG RESP2 board, motherboard or
DPU board is faulty if the ECG waveform on the screen
has nothing wrong.
Replace the ECG input
block or DPU board with a
new one*.
Respiration rate is wrong
and the respiration
sensitivity is out of control.
ECG RESP1 board or ECG RESP2 board is faulty. Replace the ECG input
block with a new one*.
ECG waveform and
respiration waveform are
mixed.
Motherboard or DPU board is faulty. Replace the ECG input
block or DPU board with a
new one*.
Respiration waveform is
saturated and does not
return to the baseline
position but the sensitivity
is not too high.
ECG RESP2 board is faulty. Replace the ECG input
block with a new one*.
* 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”.