HP 4600 Service Manual - Page 368

Light image This table contains information about the causes of and solutions for light images. Table 7-19 Causes for light images Cause The image density is not adjusted correctly. A poor contact in the attaching bias contacts between the ETB and the high-voltage PCA. The attaching roller is worn or damaged. The high-voltage PCA is defective. The DC controller PCA is defective. Solution Increase the density for each color. Clean the contacts. Replace them if they are still dirty or are damaged. Replace the ETB. Calibrate the printer after replacing the ETB. See Calibrate 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). Light color This table contains information about the causes of and solutions for light color. Table 7-20 Causes for light color Cause A poor contact exists in the transfer bias contacts between the ETB and the printer. The transfer charging roller is worn or damaged. The photosensitive drum is worn. The high-voltage PCA is defective. The laser/scanner unit is defective. The DC controller PCA is defective. Solution Clean the contacts for the affected color. If the contacts are still dirty after cleaning or if they are damaged, replace the contacts or the ETB. Calibrate the printer after replacing the ETB. See Calibrate Now (HP Color LaserJet 4600 models) or Full Calibrate Now (HP Color LaserJet 4610n and 4650 models). Replace the ETB. Calibrate the printer after replacing the ETB. See Calibrate Now (HP Color LaserJet 4600 models) or Full Calibrate Now (HP Color LaserJet 4610n and 4650 models). Replace the print cartridge for the affected color. Replace the high-voltage PCA. Replace the laser/scanner for the affected color. See Calibrate Now (HP Color LaserJet 4600 models) or Full Calibrate Now (HP Color LaserJet 4610n and 4650 models). 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). 352 Chapter 7 Troubleshooting ENWW