Philips M3921A, Service Manual

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Troubleshooting Guide
Chapter 5 - Troubleshooting 53
Serviceable Hardware
Error Codes for A3
IListed below are error codes for the A3 that correspond to hardware
problems, and the recommended actions to take should such an error be
encountered.
A The measured value of the
isolated reference supply on the
front end is low. 1. Check power supply.
2. Replace Main PCB.
B The measured value of the
isolated reference supply on the
front end is high. 1. Check power supply.
2. Replace Main PCB.
D A checksum error is detected on
the NiBP region of Flash Memory. 1. Cycle power.
2. If error persists, replace
main PCB.
E A checksum error is detected on
the power-up settings region of
Flash memory. 1. Turn Power Off.
2. Turn power back on while
pressing both the
CONTRAST and VOLUME
buttons. See “Restoring
Factory Settings” on
page 45, Chapter 4.
3. All user selections must be
restored.
4. If error persists, replace
Main PCB.
64 The SpO
2
module is sending an
error message to the host CPU.
1. Cycle power.
2. If problem persists, replace
Main PCB.
65 The SpO
2
module is not
communicating with the host
CPU.
1. Cycle power.
2. If problem persists, replace
main PCB.
Hex Code Explanation Recommended Action
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.