Revision D 250 Series Maternal/Fetal Monitor 4-53
2020551-001
Maintenance: Before You Begin Electronic Calibration
Before You Begin Electronic Calibration
General
Refer to the assembly drawings for the location of adjustments and test points
referred to in this section. The board assembly drawing numbers are given for each
board in this section. The electronic calibration procedure outlined in this section
necessitates removal of the monitor’s top cover. Also, the following equipment will
be needed in order to carry out the procedural steps.
Digital Voltmeter, 4 1/2 digit or equivalent
Plastic Alignment Tool
Oscilloscope
Handling Precautions
The following guidelines should be followed when handling circuit boards or
assemblies containing circuit boards. Following these procedures helps resist
damage that can be caused by static electricity.
Discharge any static charge you may have built up before handling parts.
Wear a grounded, anti-static wristband at all times.
Use a static-free work surface.
Store items in anti-static bags or boxes.
Do not remove items from anti-static containers until needed.
Power Supply Voltages—Verification
There are no adjustments for the power supply voltages; however, you can verify
them as follows:
Main Board Power Supply Voltages
Using a digital voltmeter, measure and verify the power supply voltages using the
J14 connector on the Main Board. Refer to Table 20.
NOTE: There are no adjustments for these voltages.
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