HP 8550 Service Manual - Page 122
Adjustments unique to the HP LaserJet 8550MFP print engine, To replace the dc controller PCB - color laserjet user manual
View all HP 8550 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 122 highlights
Adjustments unique to the HP LaserJet 8550MFP print engine To replace the dc controller PCB 1 Remove the dc controller PCB as shown in the HP Color LaserJet 8500/8550 Printer Family Service Manual. 2 Install the new dc controller PCB. 3 Reassemble the parts except for the printer unit rear cover. Do not replace the rear cover until you have determined that the printer operates normally. 4 Connect the power plug to the power outlet 5 Turn on the copy module rear power switch. 6 Turn on the control panel power soft switch. 7 Execute auto gradation correction in user mode. To replace the ECO-2 PCB 1 Start service mode by first pressing , then pressing 2 and 8 simultaneously, and then pressing again. 2 Select FUNCTION>MISC-P>DC-SAVE. 3 Press OK. 4 Turn the printer off. 5 Remove the old ECO-2 PCB assembly and replace it with a new ECO-2 PCB assembly. 6 Turn the printer on. 7 Start service mode. 8 Select FUNCTION>MISC-P>DC-LOAD. 9 Press OK. 10 End service mode, and turn off and then on the control panel power soft switch. 120 Chapter 4 - Adjustments and maintenance EN