HP 4600 Service Manual - Page 373

Table 7-32 Causes for a missing color (continued) Cause The high-voltage PCA is defective. The DC controller PCA is defective. Solution Now (HP Color LaserJet 4600 models) or Full Calibrate Now (HP Color LaserJet 4610n and 4650 models). Replace the high-voltage PCA. Replace the DC controller PCA. Calibrate the printer after replacing the DC controller. See Calibrate Now (HP Color LaserJet 4600 models) or Full Calibrate Now (HP Color LaserJet 4610n and 4650 models). Blank spots This table contains information about the causes of and solutions for blank spots. Table 7-33 Causes for blank spots Cause The high-voltage PCA is defective. The DC controller PCA is defective. Solution Replace the high-voltage PCA. Replace the DC controller PCA. Calibrate the printer after replacing the DC controller. See Calibrate Now (HP Color LaserJet 4600 models) or Full Calibrate Now (HP Color LaserJet 4610n and 4650 models). Poor fusing This table contains information about the causes of and solutions for poor fusing. Table 7-34 Causes for poor fusing Cause The media is not within specifications. For example, media that is too thick causes poor fusing. The fuser is not within nip-width specifications. The fuser sleeve is scarred or damaged. The pressure roller is scarred or damaged. The thermistor has deteriorated. The DC controller PCA is defective. Solution Use media that meets specifications. See chapter 1. Replace the fuser. Replace the fuser. Replace the fuser. Replace the fuser. Replace the DC controller PCA. Calibrate the printer after replacing the DC controller. See Calibrate Now (HP Color LaserJet 4600 models) or Full Calibrate Now (HP Color LaserJet 4610n and 4650 models). ENWW Image defects troubleshooting 357