Philips M3921A, Service Manual

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Troubleshooting Guide
52 Chapter 5 - Troubleshooting
4. Simultaneously press the
CONTRAST
button and the
ON/
STANDBY
button to power up the monitor. Keep the contrast
button depressed until the monitoring screen appears (after 10 seconds).
The error code printout is generated automatically.
If error codes listed on the Diagnostic Mode error code screen or on the error
log printout are in the range from 1 to 65 (hex), a hardware problem has been
detected. Refer to the section titled, “Serviceable Hardware Error Codes” for
additional information on these codes.
Serviceable Hardware Error Codes
Serviceable Hardware
Error Codes for A1
Listed below are error codes for the A1 that correspond to hardware problems,
and the recommended actions to take should such an error be encountered.
Hex Code Explanation Recommended Action
1 Improper shutdown. 1. Cycle power.
2. If this error persists, return
monitor for service.
2 NiBP Sensor Error.
• The two pressure system.
transducers do not agree.
1. Check for blocked tubing in
the pneumatic system.
2. Replace Main PCB.
3 NiBP Pressure Violation Error.
• The pressure on the cuff
could not be removed by
normal means.
• A fault has been detected in
the NiBP system that could
not be handled by releasing
pressure by normal means.
1. Cycle power.
2. Check for blocked tubing in
the pneumatic system.
3. Replace Main PCB.
4 The measured value of the 3.3V
power supply is low. 1. Check power supply.
2. Replace Main PCB.
5 The measured value of the 3.3V
power supply is high. 1. Check power supply.
2. Replace Main PCB.
7 The measured value of the 12V
power supply is high. 1. Check power supply.
2. Replace Main PCB.
8 The measured value of the 5V
power supply is low. 1. Check power supply.
2. Replace Main PCB.
9 The measured value of the 5V
power supply is high. 1. Check power supply.
2. Replace Main PCB.