Welch Allyn Connex Service Manual page 36

32 Troubleshooting
Symptom
The battery doesn't charge or run
time is low
Hardware
Mechanical Symptom
Noisy fan
Possible cause
An internal connection is faulty
The power supply is defective
The battery is defective
The main board is defective
The battery is defective
The battery connector board is defective
The battery has reached the end of its useful life Use the service tool to check
Possible cause
Dust build up
Fan is out of balance
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Welch Allyn Connex Integrated Wall System
Suggested action
Check the power-flex cable
connection at J6 on the main
board.
Check the AC power harness
connections from the IEC
connector to the power supply.
Check the power harness from
the power supply J2 to J30 on
the main board.
Check the battery power harness
from J2 on the battery connector
board to J29 on the main board.
Check the output voltage on the
power supply. The voltage should
be 15 V ± 0.45V DC. If it is not,
replace the power supply.
Charge the battery for 5 hours. If
the battery icon on the display
still shows an empty battery
symbol, replace the battery.
Replace the main board.
Charge the battery for 5 hours. If
the battery icon on the display
still shows an empty battery
symbol, replace the battery.
Check the battery connector
board for an open short or broken
connector and replace if
necessary.
cycle count. If the cycle count
exceeds 300, replace the battery.
Suggested action
Use canned air to blow dust out
of fan.
Replace fan.