HP 8550 Service Manual - Page 71
Level 2 item, Description, Indicates that the value is outside the stable C image guarantee - drum unit
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Table 23. Copier, display mode Level 2 and Level 3 menus (continued) Level 2 item SENSOR MISC ALARM-1 Level 3 item SC-HP W-TONER DOC-SZ DRUMLIFE DSNS-ALM Y-OUTRNG M-OUTRNG C-OUTRNG K-OUTRNG ENV-DENS ENV-TR FL-LIFE DF Description Output of the scanner home position sensor (0 = home position, 1 = non-home position) Indicates that the waste toner case is almost full (0 = normal, 1 = full warning) Original size detected by the original size sensor (xxxx = A4, A3, B4, B5, and so on) Life of the photosensitive drum in the drum cartridge: 0 = normal 1 = warning 1 (70%) 2 = warning 2 (100%, at which point the copy module cannot ensure normal levels of quality) 4 = memory error The density sensor is faulty on the printer side; indicates that the value is outside the stable image guarantee range for the printer (0 = normal, 1 = error) Check the sensors and the condition of the intermediate transfer drum. If the warning remains, density control will fail, bringing about gradual deterioration of image quality. Indicates that the value is outside the stable Y image guarantee range for the printer unit (0 = normal, 1 = error) Indicates that the value is outside the stable M image guarantee range for the printer unit (0 = normal, 1 = error) Indicates that the value is outside the stable C image guarantee range for the printer unit (0 = normal, 1 = error) Indicates that the value is outside the stable K image guarantee range for the printer unit (0 = normal, 1 = error) Site environment; checks the temperature and humidity inside the printer and indicates the environmental range for density control 0: normal temperature/normal humidity (N/N) 1: high temperature/high humidity (H/H) 2: normal temperature/low humidity (N/L) 3: low temperature/low humidity (L/L) Site environment; checks the temperature and humidity inside the printer and indicates the environmental range for transfer control 0: N/N 1: H/H 2: N/L 3: L/L Life of the scanning lamp (0 = normal, 1 = warning); when endof-life is reached, E219 is indicated Latest ADF error ("00" if no errors) EN Service mode 69