Philips M3921A Service Manual page 65

Serviceable Hardware
Error Codes for A3
Chapter 5 - Troubleshooting
Hex Code
A The measured value of the
isolated reference supply on the
front end is low.
B The measured value of the
isolated reference supply on the
front end is high.
D A checksum error is detected on
the NiBP region of Flash Memory.
E A checksum error is detected on
the power-up settings region of
Flash memory.
64 The SpO
error message to the host CPU.
65 The SpO
communicating with the host
CPU.
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.
Hex Code
Improper shutdown.
1
2 NiBP Sensor Error.
• The two pressure system.
transducers do not agree.
Explanation
module is sending an
2
module is not
2
Explanation
Troubleshooting Guide
Recommended Action
1. Check power supply.
2. Replace Main PCB.
1. Check power supply.
2. Replace Main PCB.
1. Cycle power.
2. If error persists, replace
main PCB.
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.
1. Cycle power.
2. If problem persists, replace
Main PCB.
1. Cycle power.
2. If problem persists, replace
main PCB.
Recommended Action
1. Cycle power.
2. If this error persists, return
monitor for service.
1. Check for blocked tubing in
the pneumatic system.
2. Replace Main PCB.
53