5-44 250 Series Maternal/Fetal Monitor Revision D
2020551-001
Troubleshooting: System Troubleshooting
SYSTEM POWER SUPPLY
MAIN BOARD Communicates with Keypad
DSP BOARD Front Panel Keypad signals routed through DSP
PWA
FAN Secondary cause from overheating
NIBP START/STOP
HOSES
To front panel, Pneumatics to main
(blank)
Would affect all buttons on front panel
Could affect NIBP Start/Stop button
(blank)
Can cause failures due to overheating
Would affect all buttons on front panel
Pump, valves, hoses
Affects all front panel functions
To front panel, Pneumatics to main
DSP TO UI KEYPAD CABLE Affects all front panel functions
UI KEYPAD BOARD Would affect all buttons on front panel
PNEUMATICS BOARD (PUMP &
VALVES)
Pump, valves, hoses
MAIN BOARD Communicates with keypad
SYSTEM POWER SUPPLY
DSP BOARD Front panel keypad routed through DSP board
FAN Secondary failure due to overheating only
MARK [OFFSET]
SYSTEM POWER SUPPLY
MAIN BOARD Receives mark from rear panel
FAN Secondary failure due to overheating only
FAST
MAIN BOARD Receives FAST signal from Rear Panel
SYSTEM POWER SUPPLY
FAN Secondary failure due to overheating only
250 SERIES SERVICE & TROUBLE SHOOTING
PROBLEM SUBASSEMBLY COMMENTS
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