When performing software updates (or upgrades) to the operating software of the MR400,
ensure that all remaining devices in the monitor's network are at the same or a compatible
software revision level. Failure to observe this requirement could result in compatibility
conflicts, communication problems, et cetera.
Calibrating the Touch Screen
Touch screen calibration is not routinely required, but will occur after installation of new
To calibrate the touch screen menu, refer to the service manual (REF 989803181911).
Methods for troubleshooting problems when the equipment seems to be functioning incorrectly
include using displayed alarm messages as a starting point; see chapter 4 for a listing.
Planned maintenance and user routine‐testing are also helpful ways to confirm device operations
or to help identify a problem; see page 14‐4.
Troubleshooting the MR400 is comprehensively described in the service documentation. Philips
provides a full planned maintenance and repair service on both a call basis and a contract basis.
Full details are available from your Philips Service Organization.
The MR400 contains no user‐serviceable parts. All repairs must be performed by trained service
personnel. All repairs on products under warranty must be performed by authorized personnel
or in an authorized Service and Repair Center. Unauthorized repairs will void the warranty.
Circuit diagrams, component part lists, descriptions, calibration instructions, and other
information to assist service personnel in the repair of the serviceable parts of the device are
available in the service manual (REF 989803181911) and on request.
14‐16 Maintenance and Troubleshooting
Expression MR400 Instructions for Use