HP 8550 Service Manual - Page 462
Copy module troubleshooting, Overview, Necessary adjustments for replaced parts - color laserjet error codes
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Copy module troubleshooting Overview Copy module troubleshooting will generally proceed in the order specified in the following outline: 1 Replaced parts and necessary adjustments 2 Image fault troubleshooting 3 Error codes and faults not identified by error codes 4 Copy module service mode to test parts Necessary adjustments for replaced parts If any of the following parts have been replaced recently, or if service was performed on any of them, see chapter 4, "Adjustments and maintenance," to complete adjustments: l Printer dc controller PCB (printer part) l ECO-2PCB (printer part) l Reader controller PCB l CCD unit l Scanning lamp l Density detection PCB See "To replace the dc controller PCB" on page 120. Also see the HP Color LaserJet 8500/8550 Printer Family Service Manual for the procedure to change the dc controller PCB hardware. See "To replace the ECO-2 PCB" on page 120. See "To replace the reader controller PCB" on page 129. See "To replace the CCD Unit" on page 131. See "To replace the scanning lamp" on page 132. See "To replace the intensity detection PCB, or to remove and replace the same scanning lamp" on page 133. 460 Chapter 7 - Troubleshooting EN