Service Manual
Page 10
......184 Multipurpose tray (tray 1)...185 Front cover...186 Control panel...187 Installing a new overlay (HP Color LaserJet 4600 models 189 Installing a new control-panel label (HP Color LaserJet 4650 models 190 Internal components...191 DC controller shield...191 Internal components (front 192 Paper pickup... pickup drive unit 196 Multipurpose tray pickup roller and separation pad 197 Solenoids...199 Color registration detection unit 200 Internal components (left side 202 Environment sensor (HP Color LaserJet 4610n/4650 models only 202 Drum drive units 203 Memory-tag antenna PCAs 209 ...
......184 Multipurpose tray (tray 1)...185 Front cover...186 Control panel...187 Installing a new overlay (HP Color LaserJet 4600 models 189 Installing a new control-panel label (HP Color LaserJet 4650 models 190 Internal components...191 DC controller shield...191 Internal components (front 192 Paper pickup... pickup drive unit 196 Multipurpose tray pickup roller and separation pad 197 Solenoids...199 Color registration detection unit 200 Internal components (left side 202 Environment sensor (HP Color LaserJet 4610n/4650 models only 202 Drum drive units 203 Memory-tag antenna PCAs 209 ...
Service Manual
Page 102
...touch the ETB with the damp cloth or with alcohol. Component Outside covers Inside general ETB attaching roller Paper pickup rollers Color registration detection unit Cleaning method Use an HP Toner Cleaning Cloth (part number 5090-3379) or a water-dampened cloth. The pages that is capable of filtering .... Toner particles used if it off and unplug all power cords to avoid shock hazard. Before you begin these steps, turn the printer off with alcohol. Clean with lint-free paper. Observe the warning and caution below. If dirt cannot be hot. Clean with lint...
...touch the ETB with the damp cloth or with alcohol. Component Outside covers Inside general ETB attaching roller Paper pickup rollers Color registration detection unit Cleaning method Use an HP Toner Cleaning Cloth (part number 5090-3379) or a water-dampened cloth. The pages that is capable of filtering .... Toner particles used if it off and unplug all power cords to avoid shock hazard. Before you begin these steps, turn the printer off with alcohol. Clean with lint-free paper. Observe the warning and caution below. If dirt cannot be hot. Clean with lint...
Service Manual
Page 135
... 119 To clear a potential on until a print operation is completed and each motor stops rotating. From the end of the printer and to print. INTR (initial rotations period) From immediately after the formatter inputs a print command until the power is sent ... Then the initial rotations period starts again. Operation sequence A microcomputer in preparation for a print operation. The printer also executes the pulse width modulation adjustment, color registration adjustment, and image density calibration control as required. PRINT (print period) From the end of the PRINT ...
... 119 To clear a potential on until a print operation is completed and each motor stops rotating. From the end of the printer and to print. INTR (initial rotations period) From immediately after the formatter inputs a print command until the power is sent ... Then the initial rotations period starts again. Operation sequence A microcomputer in preparation for a print operation. The printer also executes the pulse width modulation adjustment, color registration adjustment, and image density calibration control as required. PRINT (print period) From the end of the PRINT ...
Service Manual
Page 158
...Transfer charging rollers (four) ■ ETB-driven rollers (three) The ETB motor drives the ETB feed roller, causing the belt to ensure good color registration. 142 Chapter 5 Theory of the ETB unit detects its speed. A sensor at the top of operation ENWW The DC controller maintains a constant ETB... feed speed to rotate. Electrostatic transfer/transport belt (ETB) unit The ETB unit feeds the media through the printer and helps transfer toner onto the media. Figure 5-19 ETB unit illustrates the ETB unit. Figure 5-19 ETB unit The following are ...
...Transfer charging rollers (four) ■ ETB-driven rollers (three) The ETB motor drives the ETB feed roller, causing the belt to ensure good color registration. 142 Chapter 5 Theory of the ETB unit detects its speed. A sensor at the top of operation ENWW The DC controller maintains a constant ETB... feed speed to rotate. Electrostatic transfer/transport belt (ETB) unit The ETB unit feeds the media through the printer and helps transfer toner onto the media. Figure 5-19 ETB unit illustrates the ETB unit. Figure 5-19 ETB unit The following are ...
Service Manual
Page 170
.... For this process. 154 Chapter 5 Theory of operation ENWW Color misregistration occurs when the individual colors do not print directly on top of one to another . Figure 5-31 Color registration calibration illustrates this reason, whenever a new print cartridge or ETB unit is installed, the printer must adjust the rotational speed of the rollers in individual...
.... For this process. 154 Chapter 5 Theory of operation ENWW Color misregistration occurs when the individual colors do not print directly on top of one to another . Figure 5-31 Color registration calibration illustrates this reason, whenever a new print cartridge or ETB unit is installed, the printer must adjust the rotational speed of the rollers in individual...
Service Manual
Page 171
There are three types of the photosensitive drum, toner, etc. Figure 5-31 Color registration calibration Drum phase calibration The drum phase calibration aligns all four cartridge motors and their drive gears. These controls operate when necessary... of the image density caused by an environmental change control: The environment condition sensor (HP Color LaserJet 4610n and 4650 models) controls the bias according to the environment conditions. ■ Image density control (D-max): the color misregistration sensor (PS12) calibrates the bias value when the image density is at max....
There are three types of the photosensitive drum, toner, etc. Figure 5-31 Color registration calibration Drum phase calibration The drum phase calibration aligns all four cartridge motors and their drive gears. These controls operate when necessary... of the image density caused by an environmental change control: The environment condition sensor (HP Color LaserJet 4610n and 4650 models) controls the bias according to the environment conditions. ■ Image density control (D-max): the color misregistration sensor (PS12) calibrates the bias value when the image density is at max....
Service Manual
Page 172
...color registration detection unit measures the image density of the density patterns that are formed on the ETB. 3 The DC controller uses the density measurements to adjust the developing bias to obtain he correct image density. 156 Chapter 5 Theory of operation ENWW Environmental change control (HP Color LaserJet...Detection signal (TEMSNS) and the Humidity Detection signal (HUMSNS). The DC controller controls the following events occurs: ■ When the printer is turned on these two signals. The sensor sends this is replaced ■ After a set number of pages have printed ...
...color registration detection unit measures the image density of the density patterns that are formed on the ETB. 3 The DC controller uses the density measurements to adjust the developing bias to obtain he correct image density. 156 Chapter 5 Theory of operation ENWW Environmental change control (HP Color LaserJet...Detection signal (TEMSNS) and the Humidity Detection signal (HUMSNS). The DC controller controls the following events occurs: ■ When the printer is turned on these two signals. The sensor sends this is replaced ■ After a set number of pages have printed ...
Service Manual
Page 173
... optimum developing bias determined during image density calibration, the DC controller forms density patterns on the photosensitive drum in each color cartridge. 2 These density patterns are transferred to the ETB, and the color-registration detection unit measures the image density of image halftone calibration. Image density calibration must always be performed in order...
... optimum developing bias determined during image density calibration, the DC controller forms density patterns on the photosensitive drum in each color cartridge. 2 These density patterns are transferred to the ETB, and the color-registration detection unit measures the image density of image halftone calibration. Image density calibration must always be performed in order...
Service Manual
Page 174
... light, the DC controller stops the printer and issues a "density sensor abnormality" warning to measure image density. The DC controller emits a light from sensors located above the density detection patterns on the ETB. Image density detection Each of the image stabilization controls uses the color registration unit at the top of the ETB...
... light, the DC controller stops the printer and issues a "density sensor abnormality" warning to measure image density. The DC controller emits a light from sensors located above the density detection patterns on the ETB. Image density detection Each of the image stabilization controls uses the color registration unit at the top of the ETB...
Service Manual
Page 216
This screw is located on the right side of the printer, underneath the plate where the screws in callout 2 are located. 200 Chapter 6 Removal and replacement ENWW Color registration detection unit 1 Open the top cover and the front cover. 2 Remove the ETB. See Control panel. 4 Disconnect one connector (callout 1). 5 Remove two screws (callout 2). 6 Remove one screw (callout 3). NOTE To protect the ETB from damage, always remove the ETB when removing the color registration detection unit. 3 Remove the control panel.
This screw is located on the right side of the printer, underneath the plate where the screws in callout 2 are located. 200 Chapter 6 Removal and replacement ENWW Color registration detection unit 1 Open the top cover and the front cover. 2 Remove the ETB. See Control panel. 4 Disconnect one connector (callout 1). 5 Remove two screws (callout 2). 6 Remove one screw (callout 3). NOTE To protect the ETB from damage, always remove the ETB when removing the color registration detection unit. 3 Remove the control panel.
Service Manual
Page 217
7 Remove the control panel support assembly (callout 4), and then remove the color registration detection unit, which is located behind the stay. Figure 6-27 Remove the color registration detection unit (1 of 2) Figure 6-28 Remove the color registration detection unit (2 of 2) ENWW Internal components 201
7 Remove the control panel support assembly (callout 4), and then remove the color registration detection unit, which is located behind the stay. Figure 6-27 Remove the color registration detection unit (1 of 2) Figure 6-28 Remove the color registration detection unit (2 of 2) ENWW Internal components 201
Service Manual
Page 281
...Printer-error troubleshooting 265 A tray has been loaded with the DC controller. 3 Replace the color-registration detection unit. 4 If the message persists, replace the DC controller PCA. is a standard size and the switch in the tray is waiting for detailed information. See Calibrate Now (HP Color LaserJet 4600...If the message persists, replace the EIO disk drive. When the printer receives another file, the message should disappear. Table 7-2 Alphabetical printer messages (HP Color LaserJet 4600 models) (continued) Message Description Action NOTE This message might also ...
...Printer-error troubleshooting 265 A tray has been loaded with the DC controller. 3 Replace the color-registration detection unit. 4 If the message persists, replace the DC controller PCA. is a standard size and the switch in the tray is waiting for detailed information. See Calibrate Now (HP Color LaserJet 4600...If the message persists, replace the EIO disk drive. When the printer receives another file, the message should disappear. Table 7-2 Alphabetical printer messages (HP Color LaserJet 4600 models) (continued) Message Description Action NOTE This message might also ...
Service Manual
Page 296
...color-registration detection unit. 4 If the message persists, replace the DC controller PCA. See Full Calibrate Now (HP Color LaserJet 4610n and 4650 models). 2 If the message persists, verify the cables are seated correctly and the connector J1024 is missing or incorrectly installed. Press to be closed. 1 Press for detailed information. Calibrate the printer... Full Calibrate Now on . The covers have to continue. Table 7-3 Alphabetical printer messages (HP Color LaserJet 4610n and 4650 models) (continued) Message Description Action CHOSEN PERSONALITY NOT AVAILABLE To...
...color-registration detection unit. 4 If the message persists, replace the DC controller PCA. See Full Calibrate Now (HP Color LaserJet 4610n and 4650 models). 2 If the message persists, verify the cables are seated correctly and the connector J1024 is missing or incorrectly installed. Press to be closed. 1 Press for detailed information. Calibrate the printer... Full Calibrate Now on . The covers have to continue. Table 7-3 Alphabetical printer messages (HP Color LaserJet 4610n and 4650 models) (continued) Message Description Action CHOSEN PERSONALITY NOT AVAILABLE To...
Service Manual
Page 322
... listed. 54.1 error: Check the fuser. See Calibrate Now (HP Color LaserJet 4600 models). 306 Chapter 7 Troubleshooting ENWW Replace the color-registration detection assembly. 17 cyan CPR sensor 18 black CPR sensor 19 ETB speed control sensor 54.19 error: Check the ETB connection. Calibrate the printer. This is installed in both of the DIMMs to a different...
... listed. 54.1 error: Check the fuser. See Calibrate Now (HP Color LaserJet 4600 models). 306 Chapter 7 Troubleshooting ENWW Replace the color-registration detection assembly. 17 cyan CPR sensor 18 black CPR sensor 19 ETB speed control sensor 54.19 error: Check the ETB connection. Calibrate the printer. This is installed in both of the DIMMs to a different...
Service Manual
Page 337
... 9 cyan drum phase (home) position sensor 10 black drum phase (home) position sensor 54.5 error: Check the connections. Replace the color registration detection assembly. 54.6 error: Check the connections. Table 7-5 Numerical printer messages (HP Color LaserJet 4610n and 4650 models) (continued) Message Description Action 53.XY.ZZ CHECK RAM DIMM SLOT alternates with An error occurred...
... 9 cyan drum phase (home) position sensor 10 black drum phase (home) position sensor 54.5 error: Check the connections. Replace the color registration detection assembly. 54.6 error: Check the connections. Table 7-5 Numerical printer messages (HP Color LaserJet 4610n and 4650 models) (continued) Message Description Action 53.XY.ZZ CHECK RAM DIMM SLOT alternates with An error occurred...
Service Manual
Page 338
Table 7-5 Numerical printer messages (HP Color LaserJet 4610n and 4650 models) (continued) Message Description Action 17 cyan CPR sensor 18 black CPR sensor necessary. See Full Calibrate Now (HP Color LaserJet 4610n and 4650 models). 54.20 error: Check the connection. Replace the DC controller. Replace the ETB. Replace the DC controller. Replace the color-registration detection assembly. 54.21...
Table 7-5 Numerical printer messages (HP Color LaserJet 4610n and 4650 models) (continued) Message Description Action 17 cyan CPR sensor 18 black CPR sensor necessary. See Full Calibrate Now (HP Color LaserJet 4610n and 4650 models). 54.20 error: Check the connection. Replace the DC controller. Replace the ETB. Replace the DC controller. Replace the color-registration detection assembly. 54.21...
Service Manual
Page 369
... PCA is defective. Table 7-23 Causes for all black or solid color. Table 7-21 Causes for dark color. The color-registration detection unit is defective. See Calibrate Now (HP Color LaserJet 4600 models) or Full Calibrate Now (HP Color LaserJet 4610n and 4650 models). Replace the color-registration detection unit. Calibrate the printer after cleaning, or if they are damaged, replace the cartridge. The...
... PCA is defective. Table 7-23 Causes for all black or solid color. Table 7-21 Causes for dark color. The color-registration detection unit is defective. See Calibrate Now (HP Color LaserJet 4600 models) or Full Calibrate Now (HP Color LaserJet 4610n and 4650 models). Replace the color-registration detection unit. Calibrate the printer after cleaning, or if they are damaged, replace the cartridge. The...
Service Manual
Page 374
... Quality menu. Calibrate the printer after replacing the DC controller. Replace the color registration detection unit. Table 7-36 Causes for misplaced images. Solution See Paper is defective. Calibrate the printer after cleaning, or if they are still dirty after replacing the laser/scanner. See Calibrate Now (HP Color LaserJet 4600 models) or Full Calibrate Now (HP Color LaserJet 4610n and 4650 models...
... Quality menu. Calibrate the printer after replacing the DC controller. Replace the color registration detection unit. Table 7-36 Causes for misplaced images. Solution See Paper is defective. Calibrate the printer after cleaning, or if they are still dirty after replacing the laser/scanner. See Calibrate Now (HP Color LaserJet 4600 models) or Full Calibrate Now (HP Color LaserJet 4610n and 4650 models...
Service Manual
Page 489
...; 4600 Only 3 Color-registration-detection assembly 4 Paper pickup assembly; 4600 Only 4 Paper pickup assembly; 4610n/4650 Only 5 ETB assembly; 4600 Only 5 ETB assembly; 4610n/4650 Only 6 Cap, right 7 Spring, tension 8 Cap, left 9 Developing disengaging drive assembly 10 Damper assembly (top cover hinge) 11 Fuser drive assembly; 4600 Only 11 Fuser drive assembly; 4610n/4650 Only 12 Laser...
...; 4600 Only 3 Color-registration-detection assembly 4 Paper pickup assembly; 4600 Only 4 Paper pickup assembly; 4610n/4650 Only 5 ETB assembly; 4600 Only 5 ETB assembly; 4610n/4650 Only 6 Cap, right 7 Spring, tension 8 Cap, left 9 Developing disengaging drive assembly 10 Damper assembly (top cover hinge) 11 Fuser drive assembly; 4600 Only 11 Fuser drive assembly; 4610n/4650 Only 12 Laser...
Service Manual
Page 525
...Cassette-frame right assembly Color-registration-detection assembly CompactFlash; 4610n Only CompactFlash; 4650 Only Connector, drawer Contact-pin assembly Control-panel assembly, 110 V; 4600 Only Control-panel assembly, 220 V; 4600 Only Control-panel ... Cassette (tray 2) Cassette (tray 2) Internal components (2 of 5) 500-sheet paper feeder assembly Internal components (2 of 5) Internal components (4 of 5) Printer PCAs Printer PCAs Internal components (3 of 5) Internal components (1 of 5) Internal components (1 of 5) Internal components (1 of 5) Internal components (1 of 5) Internal components...
...Cassette-frame right assembly Color-registration-detection assembly CompactFlash; 4610n Only CompactFlash; 4650 Only Connector, drawer Contact-pin assembly Control-panel assembly, 110 V; 4600 Only Control-panel assembly, 220 V; 4600 Only Control-panel ... Cassette (tray 2) Cassette (tray 2) Internal components (2 of 5) 500-sheet paper feeder assembly Internal components (2 of 5) Internal components (4 of 5) Printer PCAs Printer PCAs Internal components (3 of 5) Internal components (1 of 5) Internal components (1 of 5) Internal components (1 of 5) Internal components (1 of 5) Internal components...