HP 8550 Service Manual - Page 133
Replacing the firmware/localization DIMM, To replace the CCD Unit, Turn off the copier.
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Page 133 highlights
Replacing the firmware/localization DIMM 1 Enter service mode on the copier. 2 Select COPIER > FUNCTION > CLEAR > R-CON. 3 Select COPIER > ADJUST > ADJ-XY, CCD, and type in the values noted on the copy module service label. 4 Select COPIER > FUNCTION > MISC-R > USE-LAMP. 5 Press OK. 6 While the lamp is on, turn the scanning lamp adjusting VR clockwise or counterclockwise until it beeps. 7 Press OK. READY should appear on the screen. 8 Select COPIER > FUNCTION > CCD > CCD-ADJ. 9 Press OK. 10 When END appears, exit service mode. 11 Adjust auto gradation correction in user mode. (See "To adjust auto gradation" on page 125.) To replace the CCD Unit 1 Record the values (AL-RG, AL-GB) shown on the new CCD unit to the service label attached to the copy module lower front cover. 2 Turn off the copier. 3 Install the new CCD unit in the copier. (See "Removing the power supply cooling fan (FM4)" on page 375.) 4 Turn on the copier. 5 Enter service mode on the copier. 6 Type in the new CCD settings in ADJUST > CCD > AL-RG, AL-GB. These are the values recorded in step 1. 7 Execute CCD auto adjustment in FUNCTION > CCD > CCD-ADJ. 8 Adjust auto gradation correction in user mode. (See "To adjust auto gradation" on page 125.) EN Copy module adjustments 131