System Troubleshooting - GE Corometrics 250cx Series Service Manual

System Troubleshooting

PROBLEM
VIDEO
AUDIO
Revision C
Troubleshooting: System Troubleshooting
The following Section will aid in the troubleshooting and repair of your monitor.
Each of the following sub-sections begins with a general fault description, followed
by a list of possible causes and debugging hints. Before looking through the listed
problems, attempt to verify the reported problem. It is important to verify the
reported problem, whenever possible. This way you can insure, in the end, that the
repair effort was effective. If you are able to duplicate the reported problem, inspect
the monitor, accessories, connectors, cables, etc., in the area affected. If you are
unable to find anything obvious, or you are unable to verify the reported problem,
follow the step by step.
250cx Series Service & Troubleshooting
SUBASSEMBLY
COMM BOARD WITH I/O
CONNECTORS
SYSTEM POWER SUPPLY
INVERTOR
INVERTOR TO LCD PANEL
CABLE
DSP TO INVERTOR CABLE
MAIN BOARD
LCD PANEL
ENCODER BOARD
ENCODER TO LCD PANEL
CABLE
DSP BOARD
DSP TO ENCODER CABLE
FAN
MAIN BOARD
DSP BOARD
VOLUME KEYPAD
SPEAKER
250cx Series Maternal/Fetal Monitor
2036947-001
COMMENTS
Sits on same data bus as DSP/Display board
If display is very dim
If display is very dim
Video goes over this cable
Generates video and sends to DSP
Video and color affected by this board
Video and color goes over this cable
Holds Graphic Generator
Video goes over this cable
Secondary failure due to overheating only
Generates FECG/MECG/SpO
2
Ultrasound audio from DSP
Processes US, FECG, & MECG analog and
could affect
audio, gets
5-37