BeneVision N22/BeneVision N19 Patient Monitor Service Manual 4-5
4.7.3 Module Rack Failures
Failure Description Possible Cause Troubleshooting
SMR cannot identify
parameter modules
External cable defective or
poorly connected
The cable connecting SMR and the main unit of the
monitor is not connected properly or already
damaged. Verify the connecting cables and
connectors are not damaged.
Verify that contact screws on SMR or module are
tightly fastened and well connected.
Defective parameter
module
Replace the malfunctioning parameter module with a
known good module. If the patient monitor identifies
the replacement module and can start measurement, it
indicates that the original module is faulty.
Wrong communication
board software version
Upgrade the module and/or the SMR software to a
compatible level.
SMR power supply
abnormal
Check whether the SMR interface output voltage of
the main unit is 12 V. If it is abnormal, the internal
module rack COM board or main control board fails.
Check whether the contact screw output voltage of
the external module rack is 12 V. If it is abnormal,
the communication module on the SMR fails.
8-slot Module rack
communication board
defective
Replace 8-slot the module rack communication board.
DCDC board failure Replace the DCDC board.
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