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Condition
• Flex circuit between the front panel and
the CPU PCB is disconnected.
• A CPU PCB Component has failed.
• CPU PC has failed.
• The printer batteries are at or near a
voltage too low to operate the printer.
• The Display PCB has failed.
• The CPU PCB has failed.
• The printer is defective.
Error Codes
Scope of Action
Error
Code
1
2
3
4
NPB-40
Table 3:
Troubleshooting Guide
An error code is shown when the NPB-40 detects a non-correctable failure.
Table 4 provides a list of error codes for the NPB-40. When one of the following
errors occurs:
•
NPB-40 sounds a low priority alarm
•
Measurements stop
•
"Er" is shown in the %SpO
•
Error code is shown in the right numeric display
•
Cycling the power should clear the shown error code
Table 4 provides a list of error codes for the NPB-40.
Table 4: Error Codes
Action
X
Replace SpO
X
Replace SpO
X
Replace SpO
X
Replace SpO
(Continued)
Recommended Actione
Inspect the flex circuit and reconnect if the flex circuit is
loose. See Separating the Front and Back Cases on page 44.
Inspect the CPU PCB components and circuit board for
cracking, burning, or damage and replace the CPU PCB if
any are found. See CPU PCB or Display PCB Replacement
on page 46.
Replace the CPU PCB with a known good PCB. See CPU
PCB or Display PCB Replacement on page 46.
Install new batteries in the printer. See the printer
documentation.
Replace the Display PCB with a known good PCB.See CPU
PCB or Display PCB Replacement on page 46.
Replace the CPU PCB with a known good PCB. See CPU
PCB or Display PCB Replacement on page 46.
Attempt to print using a known good NPB-40. If the printer
still does not print, troubleshoot the printer. See the printer
documentation.
numeric display area
2
Explanation
board.
SpO
2
2
board.
SpO
2
2
error.
board.
SpO
2
2
board.
SpO
2
2
not allowed.
Troubleshooting
front end RAM error.
front end ROM/code integrity
front end reported a bad CRC.
front end reported FSP message
37
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Table of Contents
Troubleshooting
