Symptom Probable Cause Action
Test page prints with
error messages
Internal errors 1. NVRAM E1 or NVRAM E2:
a. Disconnect the power cable at the unit.
b. Wait 10 seconds and reconnect.
c. If the problem continues, replace the NPS unit or LAN card.
2. NVRAM E3:
a. Replace the NPS unit or LAN card.
3. NVRAM E4:
a. Disconnect the power cable at the unit.
b. Wait 10 seconds and reconnect.
c. If the problem continues, replace the NPS unit or LAN card.
4. ETHER E6, ERROR E6, COMM E8:
a. Replace the NPS unit or LAN card.
5. COMM E9:
a. Wrong token ring speed.
b. Change the ring speed. Power off the NPS unit and try again.
Table 19. Reference Table; NPS 540+ with no external power supply
1. Remove NPS from printer’s parallel connector.
2. Check for +5 V dc on pin 18 of the printer’s parallel connector (pin numbers shown on connector).
3. If +5 V dc is not present, ensure the logic board jumper that enables pin 18 voltage is installed correctly. See Figure 118 on
page 377.
4. Go to Step 2 on page 61.
Chapter 1. Diagnosing Problems
154
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