HP 8550 Service Manual - Page 198
Detecting errors, Table 58., Scanning lamp/scanning lamp heater errors, Cause, Description
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If any of the above four conditions is detected, the copy module assumes the end of the scanning lamp, and indicates a message under COPIER > DISPLAY > MISC > FL-LIFE in service mode. To replace the scanning lamp, see "Removing the scanning lamp and scanning lamp heater" on page 357. Detecting errors Table 58 shows the types of errors that are related to the scanning lamp and scanning lamp heater. Table 58. Scanning lamp/scanning lamp heater errors Code E211 E215 E216 E217 E218 E219 Cause Description The scanning lamp thermistor The temperature has fallen below a specific has an open circuit. level while it was controlled to 70° C. The scanning lamp thermistor has a short circuit. When the FLONOUT signal is off (including at time of power-on), the thermistor of the scanning lamp heater has detected 170° C or more. The scanning lamp does not The intensity sensor does not detect light turn on in 15 seconds. from the scanning lamp within 15 seconds. The scanning lamp heater is out of order. While the scanning lamp is controlled to a specific temperature by the scanning lamp heater, its temperature does not exceed the selected level after supplying the lamp heater with power for three minutes or more. The scanning lamp is out of order. The scanning lamp is not installed (as after replacement work). Or, the filament of the lamp is broken. The scanning lamp has reached the end of its life. While the scanning lamp is on, the thermistor of the scanning lamp heater has detected 150° C or more. 196 Chapter 5 - Theory of operation EN