Initial Instrument Boot Phase; How To Use The Troubleshooting Tables - Philips Avalon FM20 Service Manual

After checking/upgrading the bus master firmware, and you still suspect a defective bus master board,
first try plugging the transducers into another monitor. If the transducers work properly with the other
monitor, then exchange the bus master board.
In the case of the INOPs
more ultrasound transducers attached to the monitor, identify the transducer for which the INOP was
issued, using the blue transducer Finder LED. Touching a numeric on the screen turns on the Finder
LED light of the transducer providing the measurement. If you cannot identify the suspected
transducer directly, because the transducer Finder LED does not light up due to a defect, identify the
other functioning transducers by activating their Finder LEDs, thus finding the defective one by a
process of elimination.

Initial Instrument Boot Phase

The following table describes the regular initial boot phase of the monitor. If the boot phase does not
proceed as described below, go to "Boot Phase Failures" on page 110 for Troubleshooting
information.
Time (sec.) after
Power On
0
2
3.5
5
6-8
8-10
10-15
Troubleshooting Tables
The following tables list troubleshooting activities sorted according to symptoms.

How to Use the Troubleshooting Tables

The possible causes of failure and the remedies listed in the troubleshooting tables should be checked
and performed in the order they appear in the tables. Always move on to the next symptom until the
problem is solved.
• Boot Phase Failures
• Screen is blank
• Touchscreen not functioning
• General monitor INOP messages
• Alarm tones
• Fetal recorder
• LAN/RS232
,
FHR1 Equip Malf FHR2 Equip Malf
Boot Phase Event
Switch the monitor on using the On/Off switch
The green AC power LED lights for about 1.5 seconds
Green AC power LED is turned off, and remains off
You hear a 'pop' from the loudspeaker
Boot screen with the Philips logo appears on the display and a test sound is
issued
Boot screen with the Philips logo disappears
Fixed screen elements (for example smart keys, alarm fields) appear on the
screen
First measurement information appears on the screen, touchscreen is
functional
8 Troubleshooting
, and , when there are two or
FHR3 Equip Malf
109