HP LaserJet 5L Service Manual - Page 131
Service and Error Messages
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Table 7-4 LEDs Service and Error Messages Service errors prevent further printer operation until some action is taken. When there is a service error, all of the lights will turn on in a steady state. Press and hold the Front Panel Button to see a pattern in the lights. (The error will only be displayed as long as this button is pressed.) Use Table 7-4, "Service and Error Messages," to identify what type of service error has occurred. Service and Error Messages (1 of 3) Description Recommended Action ROM/RAM Error. An error was found with the ROM or RAM. The printer believes that the ROM is corrupted or an error has been found in the RAM. 1. Power-cycle the printer by unplugging the printer and plugging it back in. If this doesn't clear the error: 2. Unplug the printer, remove any optional memory, then power the printer back on. If the message clears, replace the memory card. 3. Replace the Formatter PCA. Fuser Error. This indicates a fusing assembly malfunction. Note: Chronic fuser failures or fuser overheating or both are indicators of an uninterruptible power supply or battery backup being used with the printer. Uninterruptible power supplies (UPS) should not be used with the printer. 1. Unplug the printer for 10 minutes or more. 2. Verify that the fuser connector is firmly seated in J102 of the DC Controller PCA and that the thermistor connector (left of fusing assembly) is seated into both the printer chassis and J206 of the DC Controller PCA. 3. Remove the connector from J102 of the DC Controller (See Figure 6-14). Measure the resistance between pins one and two of the cable. (This procedure will measure the continuity of the ceramic heating element.) Normal resistance is 30 ohms +/10 ohms. If no resistance is measured, replace the heating element. 4. Remove the thermistor (temperature feedback) connector (See Figure 7-3). Measure the resistance between pins one and two. Normal resistance is 440K ohms +/- 30K at 20 degrees C. If the resistance is not measured replace the heating element. 5. If the resistance readings are correct, yet the error persists, replace the DC Controller. 7-10 Troubleshooting