GE Corometrics 250 Series Service Manual page 180

PROBLEM
FECG
UA
5-38
Troubleshooting: System Troubleshooting
250 SERIES SERVICE & TROUBLE SHOOTING
SUBASSEMBLY
SYSTEM POWER SUPPLY
FRONT-END MOTHERBOARD
ULTRASOUND BOARD
ISOLATED POWER SUPPLY
UI KEYPAD BOARD
DSP TO UI KEYPAD CABLE
UI TO VOLUME BOARD CABLE
COMM BOARD WITH I/O
CONNECTORS
FAN
FECG FRONT-END CABLE &
CONNECTOR
ISOLATED POWER SUPPLY
FRONT-END MOTHERBOARD
FECG/UA BOARD
DSP BOARD
SYSTEM POWER SUPPLY
MAIN BOARD
COMM BOARD WITH I/O
CONNECTORS
ISOLATED POWER SUPPLY
UA FRONT-END CABLE &
CONNECTOR
DSP BOARD
FRONT-END MOTHERBOARD
FECG/UA BOARD
SYSTEM POWER SUPPLY
MAIN BOARD
250 Series Maternal/Fetal Monitor
2020551-001
COMMENTS
Passes all front-end signals. Make sure boards
seated and no connector damage exists.
Can affect ultrasound audio only if US board is
bad
By affecting ECG - does not affect ultrasound
Would affect all buttons on front panel.
Would affect all buttons on front panel.
Could affect only volume and alarm cancel
Sits on same data bus as DSP/Display board
Secondary failure due to overheating only
Usually Bad Connector Crimps
Passes all front-end signals -make sure boards
seated & no connector damage
Processes FECG analog
Processes for display
Sits on the same data bus as DSP Display Board
Usually bad connector crimps
Processes UA analog
Passes all front-end signals -make sure boards
seated & no connector damage
Processes for display
Revision D