F9 Fetal & maternal Monitor Service Manual Troubleshooting
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Chapter 8 Troubleshooting
This troubleshooting guide introduces the suitable actions for correcting the problems or
replacing the accessory or calling the service person. It can also help you to have more exact
descriptions of the fault symptoms when calling for service.
EDAN supports replacement of PCBs and major subassemblies for this product. Verify the
malfunction of the PCBAs / Modules prior to disassembling with the method described in chapter
9 Modules’ Malfunction Verification. When replacement is needed, follow the procedures
described in chapter 10 Dissembling the Monitor.
8.1 Monitor Booting Failures
Phenomenon Possible Cause Solution
No AC mains connected.
Check if the power cord is damaged.
Check if the power cord is well
connected to the power socket of the
monitor and hospital AC outlet.
The fuses are blown. Replace the fuses.
After switching on, LCD has
no display; the power
indicator is off; the fan
doesn’t run.
Main control board
defective.
Replace the main control board.
Power board defective. Replace the power board.
The fuses blow when
switching on the monitor.
Short circuit of other parts
Look for the short circuit source and
fix it.
The monitor is stricken by
strong high voltage, such as
lighting strike.
Check the power supply and earth
system.
Bad power supply
performance.
Replace power supply.
Main control board
defective.
Replace the main control board.
Abrupt switching off.
Bad connection. Check all the connectors.
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