Revision B 120 Series Maternal/Fetal Monitor 7-9
2015590-001
Calibration: Display Check
13. If you suspect that either the Display Driver Board or the Controller Power Unit
are not functioning correctly and you have another properly functioning 120
Series Monitor, substitute the entire display assembly and check for proper
operation. Refer to “Removing the Display Assembly” and “Replacing the
Display Assembly”. Contact your GE Service Representative for information
about upgrading to the larger display assembly.
Removing the Display Assembly
1. Turn off the 120 Series Monitor and disconnect the power cord from the
monitor.
2. Remove the nine screws which secure the monitor top cover. Four screws are
located on the bottom of the monitor and five screws are located in the back.
3. Remove the cover by sliding it toward the rear of the monitor.
4. Disconnect the display interconnect cable from the DSP Board at J5.
5. Disconnect the ribbon cable from the Recorder Board at J2. Leave the other
end connected to the Main Motherboard.
6. Disconnect the Power Supply cable harness from the Recorder Board at J1.
7. Disconnect the ribbon cable from the membrane switch panel. Leave the other
end connected to the DSP Board.
8. Remove the four screws which fasten the front bezel to the monitor—two on
each side.
9. Gently tilt the bezel forward until it lays flat. Be careful not to disconnect the
front end harness cable ferrite beads from their clips. The number of beads
varies depending on which options are installed in your monitor.
10. Remove the four screws which attach the display shield to the front bezel.
Retain the screws.
11. Set aside, but retain, the display shield.
12. Disconnect the display interconnect cable from J1 on the display Controller
Power Unit. Retain this cable.
13. Remove the four standoffs at the corner of the display. Retain the standoffs.
Leave the washers and spacers in place on the studs.
14. Upon inspection, you may need to replace the spacer display frame applied to
the face of the display. Refer to “Chapter 14, Replacement Parts” for parts
information. Contact GE Service Representative for part ordering information.
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