HP 4600 Service Manual - Page 370
Dots in vertical lines, Dirt on the back of the paper
UPC - 808736060875
View all HP 4600 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 370 highlights
Table 7-24 Causes for an all black or solid colored image Cause A poor contact exists in the drum ground, primary charging bias, and developing bias contacts of the high-voltage PCA and the print cartridge. The primary charging roller is defective. The high-voltage PCA is defective. The DC controller PCA is defective. Solution Clean the contacts on the cartridge for the affected color. If they are still dirty after cleaning, or if they are damaged, replace the cartridge. Replace the print cartridge for the affected color. 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). Dots in vertical lines This table contains information about the causes of and solutions for dots in vertical lines. Table 7-25 Causes for vertical lines of white dots Cause The transfer charging roller is worn or damaged. The high-voltage PCA is defective. The DC controller PCA is defective. Solution 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). Dirt on the back of the paper This table contains information about the causes of and solutions for dirt on the back of the paper. Table 7-26 Causes for dirt on the back of the paper Cause Solution One or more of the rollers are dirty. See Repetitive defects troubleshooting for information about identifying the roller that might be dirty. Clean the indicated roller. If the roller is still dirty after cleaning, replace the appropriate roller, cartridge, or assembly. The pickup roller is dirty. Clean the roller. If the roller is still dirty after cleaning, replace the pickup roller assembly. A poor contact exists in the attaching bias contacts between Clean the contacts. Replace them if they are still dirty or are the ETB and the high-voltage PCA. damaged. The high-voltage PCA is defective. The DC controller PCA is defective. Replace the high-voltage PCA. Replace the DC controller PCA. Calibrate the printer after replacing the DC controller. See Calibrate Now (HP Color 354 Chapter 7 Troubleshooting ENWW