GE Corometrics 250cx Series, Service Manual, Page: 165 / 252

Revision C 250cx Series Maternal/Fetal Monitor 5-25
2036947-001
Troubleshooting: FAQs
How do I change the Volume for FHR1
audio or heart beat tones? Option 1
1. Use the front panel Volume Up or Volume Down buttons (left) to control volume for
FHR Channel 1.
Option 2
1. Rotate the Trim Knob to highlight the field for FHR1. (This field is top left on the
display, and it may read INOP, FECG, US, or US2. However, to be able to alter the
volume with this method, you must enable one FHR1 mode by inserting a transducer
into the appropriate connector on the front of the monitor.)
2. Once the FHR1 field is highlighted, press the Trim Knob. The display changes to
show the applicable <MODE> Setup screen, where mode is the current field.
3. Now rotate the Trim Knob to highlight the FHR1 Volume: setting which is located
slightly above vertical center, on the left, next to the volume bar graph.
4. Once the Volume: setting is highlighted, press the Trim Knob again. The current
setting displays in blinking inverse video.
5. Now rotate the Trim Knob to change the current volume setting. Select a value
between 0 and 9. As the setting is changes, the bar graph changes to reflect the
current setting.
6. Once you set the desired alarm value, press the Trim Knob to confirm your selection.
The current value setting stops blinking.
7. To exit the Service mode, follow the instructions at the top of Page 16.
How do I change the volume for FHR2
audio or heart beat tones? Option 1
1. Use the front panel Volume Up or Volume Down buttons (right) to control volume for
FHR Channel 2.
Option 2
1. Rotate the Trim Knob to highlight the field for FHR2. (This field is top left on the
display, and it may read INOP or US2. However, to be able to alter the volume using
this method, you must enable one FHR2 mode by inserting a transducer into the
appropriate connector on the front of the monitor)
2. Once the FHR2 field is highlighted, press the Trim Knob. The display changes to
show the applicable <MODE> Setup screen, where mode represents the current
field.
3. Now rotate the Trim Knob to highlight the FHR2 Volume: setting which is located
slightly above vertical center, on the left, next to the volume bar graph.
4. Once the Volume: setting is highlighted, press the Trim Knob again. The current
setting displays in blinking inverse video.
5. Now rotate the Trim Knob to change the current volume setting. Select a value
between 0 and 9. As the setting changes, the bar graph changes to reflect the
current setting.
6. Once you set the desired alarm value, press the Trim Knob to confirm your selection.
The current value setting stops blinking.
7. To exit the Service mode, follow the instructions at the top of Page 16.
Question Answer