GE Corometrics 250cx Series Service Manual page 182

PROBLEM
VOLUME CONTROLS
RECORDER BUTTON: RECORDER ON
UI BUTTON: UA REF
5-42
Troubleshooting: System Troubleshooting
250cx Series Service & Troubleshooting
SUBASSEMBLY
PRINTHEAD
DSP BOARD
FAN
UI KEYPAD BOARD
MAIN BOARD
VOLUME KEYPAD
UI TO VOLUME BOARD CABLE
DSP TO UI KEYPAD CABLE
SYSTEM POWER SUPPLY
DSP BOARD
FAN
RECORDER BOARD TO MAIN
BOARD CABLE
UI KEYPAD BOARD
RECORDER BOARD
DSP TO UI KEYPAD CABLE
RECORDER MOTOR
DOOR SWITCH
MAIN BOARD
SYSTEM POWER SUPPLY
DSP BOARD
FAN
DSP TO UI KEYPAD CABLE
UI KEYPAD BOARD
SYSTEM POWER SUPPLY
MAIN BOARD
DSP BOARD
250cx Series Maternal/Fetal Monitor
2036947-001
COMMENTS
Misalignment causing drag
Front panel keypad routed through DSP board
Secondary failure due to overheating only
Would affect all buttons on front panel
Communicates with keypad
Affects volume and alarm cancel
Affects volume and alarm cancel
Affects all front panel functions
Front panel keypad routed through DSP board
Secondary failure due to overheating only
Would affect all buttons on front panel
Drives the stepper motor
Affects all front panel functions
Could have open winding or bad wire crimp in
connector
Will not print if main boards thinks door is open
Communicates with keypad
Front panel keypad routed through DSP board
Secondary failure due to overheating only
Affects all front panel functions
Would affect all buttons on front panel
Communicates with keypad
Front panel keypad routed through DSP board
Revision C