Service manual

Ultraview 1030/1050 Monitors — Service Manual
5-29
Troubleshooting
6 If the loopback test does not pass, replace the CO
2
/SDLC PCBA.
7 If all the voltages are present and the loopback test passes, then the problem is likely in the
Sensor Interface PCBA.
8 Replace the test software (P/N 174-0527-01) in U37 with the original software.
Sensor Fault
• Verify that the flex circuit is not damaged and that it is seated correctly in the connector. The
flex circuit connector is unlocked by pulling the plastic housing away from the PCBA. The flex
circuit should then pull out easily. To re-install, push the flex circuit into the connector until it
bottoms out, approximately 0.29 inches (7 mm).
• Replace the CO
2
sensor.
• Replace the Sensor Interface PCBA.
Non-Spacelabs Medical Sensor Detected
• Replace the CO
2
sensor.
Sensor Temperature Failure
• Replace the CO
2
sensor.
Warm-up Time-out
• Replace the CO
2
sensor.
O2 Zero Rejected
•O
2
sensor and/or cable is plugged into O
2
jack. Unplug the connector.
•O
2
connector does not close when the plug is removed. Jumper TP10 to TP2 of the
CO2/SDLC PCBA and repeat O
2
zero. If it passes, replace the flex circuit.
• If it fails the above test, there is something wrong with the O
2
amplifier or A to D converter.
Replace the CO
2
/SDLC PCBA.
O2 Span Rejected
• Refer to O2 Reads Low on page 5-27.
100% O2 Span Failed
• Refer to O2 Reads Low on page 5-27.
O2 Span Required
• Perform room and 100% O
2
spans (this is required whenever an O
2
sensor is changed or an
O
2
ZERO calibration is performed).