6-2 T1 Service Manual
6.5 Checking Technical Alarms
Before troubleshooting the patient monitor, check for technical alarm messages. If an alarm message is presented, eliminate
the technical alarm first.
For detailed information on technical alarm messages, possible causes and corrective actions, refer to the T1 Operator’s
Manual.
6.6 Troubleshooting Guide
6.6.1 Power On/Off Failure
Symptoms Possible Cause Correction Action
T1 fails to start
when connected to
the external DC
power
Adapter failure Check if T1 works properly when inserted in Passport 12m/17m series
patient monitor or installed to the T1 Docking Station. If so, replace the
adapter.
Power management failure If the AC power indicator or power on/off indicator does not light up,
replace the main control board.
Display defective Check the power indicators, lock/unlock button, and verify you hear an
audible tone when you touch the screen. If they all work normally,
replace the display.
Main control failure Check the backlight. If there is no light, the backlight drive circuit on the
main control board is faulty. Replace the main control board.
If the power on/off indicator lights up, but there is no audible tone after
touching the screen or sliding the lock/unlock key, replace the main
control board.
T1 fails to start
when running on
battery
Low charge or battery
defective
Charge the battery properly and test for proper voltage reading. If the
battery does not charge properly, replace it.
The Infrared board is defective If the battery works properly, and T1 works properly when connected to
the external power source, verify the infrared board is installed. If
properly installed but not working, replace the infrared board.
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