Service Manual
Page 8
...Common causes of -page sensor 173 E-label reader (memory tag) ...175 Face-down-roller shaft ...177 Cartridge door ...179 Transfer roller ...182 Registration assembly ...183 Tray 1 pickup roller ...186 Tray 2 pickup roller ...187 Separation pad ...189 6 Troubleshooting Chapter contents ...191 Troubleshooting process ...192 Troubleshooting ...123 Right-side fan ...128 Engine control unit (ECU) ...131 Left-side riser ...138 Fuser ...139 Laser/scanner ...142 Access plate ...144 Oblique-roller assembly ...146 Left-side fan ...148 High-voltage power supply (HVPS 149 Feed-guide assembly ...156 Main ...
...Common causes of -page sensor 173 E-label reader (memory tag) ...175 Face-down-roller shaft ...177 Cartridge door ...179 Transfer roller ...182 Registration assembly ...183 Tray 1 pickup roller ...186 Tray 2 pickup roller ...187 Separation pad ...189 6 Troubleshooting Chapter contents ...191 Troubleshooting process ...192 Troubleshooting ...123 Right-side fan ...128 Engine control unit (ECU) ...131 Left-side riser ...138 Fuser ...139 Laser/scanner ...142 Access plate ...144 Oblique-roller assembly ...146 Left-side fan ...148 High-voltage power supply (HVPS 149 Feed-guide assembly ...156 Main ...
Service Manual
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... ● Low-voltage PCA Figure 4-5 Print engine general structure on page 61 provides the ECU circuit diagram. It drives the laser/scanner system, the image formation system, and the pickup/feed/delivery system. Figure 4-6 Engine control unit circuit diagram on page ...supply circuit on the ECU. Rear output bin Output bin LASER/SCANNER SYSTEM Scanning mirror Laser diode BD circuit Scanner motor IMAGE Primary charging FORMATION roller SYSTEM Developing unit Fuser PhotoCleaning unit sensitive drum Transfer charging roller Duplex feed unit Tray 2 Tray 2 pickup unit ECU...
... ● Low-voltage PCA Figure 4-5 Print engine general structure on page 61 provides the ECU circuit diagram. It drives the laser/scanner system, the image formation system, and the pickup/feed/delivery system. Figure 4-6 Engine control unit circuit diagram on page ...supply circuit on the ECU. Rear output bin Output bin LASER/SCANNER SYSTEM Scanning mirror Laser diode BD circuit Scanner motor IMAGE Primary charging FORMATION roller SYSTEM Developing unit Fuser PhotoCleaning unit sensitive drum Transfer charging roller Duplex feed unit Tray 2 Tray 2 pickup unit ECU...
Service Manual
Page 77
NOTE The charges on the developing cylinder. Figure 4-12 Primary charging Step 2: Laser beam exposure The laser beam scans the photosensitive drum to neutralize negative charges on parts of the drum are more positive than the charges on the ...positive in contact with the photosensitive drum to the photosensitive drum. Step 1: Primary charging Dc and ac biases are applied to the primary charging roller, which transfers a uniform negative potential to deposit toner onto the electrostatic latent image. Figure 4-13 Developing ENWW Basic operation 65 Step 3: Developing The developing ...
NOTE The charges on the developing cylinder. Figure 4-12 Primary charging Step 2: Laser beam exposure The laser beam scans the photosensitive drum to neutralize negative charges on parts of the drum are more positive than the charges on the ...positive in contact with the photosensitive drum to the photosensitive drum. Step 1: Primary charging Dc and ac biases are applied to the primary charging roller, which transfers a uniform negative potential to deposit toner onto the electrostatic latent image. Figure 4-13 Developing ENWW Basic operation 65 Step 3: Developing The developing ...
Service Manual
Page 78
.... When the negatively charged toner comes in contact with the drum, the toner adheres to which a dc positive bias is transferred to the print media. Step 4: Transfer The transfer charging roller, to the electrostatic latent image. Photosensitive drum Media Transfer roller Figure 4-14 Transfer Step 5: Separation The elasticity of operation ENWW The image on the print media.
.... When the negatively charged toner comes in contact with the drum, the toner adheres to which a dc positive bias is transferred to the print media. Step 4: Transfer The transfer charging roller, to the electrostatic latent image. Photosensitive drum Media Transfer roller Figure 4-14 Transfer Step 5: Separation The elasticity of operation ENWW The image on the print media.
Service Manual
Page 80
... of device 1 Top output-bin delivery roller 2 Fusing roller 3 Laser/scanner 4 Photosensitive drum 5 Print cartridge 6 Registration shutter 7 Tray 1 pickup roller 8 Tray 1 separation pad 9 Tray 2 feed roller 10 Tray 2 separation pad 11 Tray 2 pickup roller 12 Duplexer pickup roller 13 Feed roller 14 Transfer roller 15 Duplexer feed roller 16 Oblique roller 17 Fuser pressure-roller 18 Fuser delivery-roller 68 Chapter 4 Theory of operation...
... of device 1 Top output-bin delivery roller 2 Fusing roller 3 Laser/scanner 4 Photosensitive drum 5 Print cartridge 6 Registration shutter 7 Tray 1 pickup roller 8 Tray 1 separation pad 9 Tray 2 feed roller 10 Tray 2 separation pad 11 Tray 2 pickup roller 12 Duplexer pickup roller 13 Feed roller 14 Transfer roller 15 Duplexer feed roller 16 Oblique roller 17 Fuser pressure-roller 18 Fuser delivery-roller 68 Chapter 4 Theory of operation...
Service Manual
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Table 4-1 Operation sequences on page 69 describes engine operations for each step of the media. Also see Figure 4-20 Timing diagram, HP LaserJet M3027/M3035 on sequence. transfers the toner image to receive print commands a print command is sent from the formatter or the power is turned on the ECU controls...the end of the INTR period until either returns to STBY or, if another print command was sent from the drum surface and cleans the transfer roller. After LSTR, the device either Prepares the device to the media. Table 4-2 Power-on sequence on until the end of the main ...
Table 4-1 Operation sequences on page 69 describes engine operations for each step of the media. Also see Figure 4-20 Timing diagram, HP LaserJet M3027/M3035 on sequence. transfers the toner image to receive print commands a print command is sent from the formatter or the power is turned on the ECU controls...the end of the INTR period until either returns to STBY or, if another print command was sent from the drum surface and cleans the transfer roller. After LSTR, the device either Prepares the device to the media. Table 4-2 Power-on sequence on until the end of the main ...
Service Manual
Page 84
...°C. The fuser heater reaches a surface temperature of operation ENWW Fuser-motor initial drive Laser/scanner-motor initial drive High-voltage control Detection of the presence of a print cartridge Cleaning of the transfer roller after 10 minutes of laser/scanner failure, fuser failure, and open covers Communication with the lamp on CPU initialization Video...
...°C. The fuser heater reaches a surface temperature of operation ENWW Fuser-motor initial drive Laser/scanner-motor initial drive High-voltage control Detection of the presence of a print cartridge Cleaning of the transfer roller after 10 minutes of laser/scanner failure, fuser failure, and open covers Communication with the lamp on CPU initialization Video...
Service Manual
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● Pickup assembly ● Tray 1 media-present sensor and top-of-page sensor ● E-label reader (memory tag) ● Face-down-roller shaft ● Cartridge door ● Transfer roller ● Registration assembly ● Tray 1 pickup roller ● Tray 2 pickup roller ● Separation pad 76 Chapter 5 Removal and replacement ENWW
● Pickup assembly ● Tray 1 media-present sensor and top-of-page sensor ● E-label reader (memory tag) ● Face-down-roller shaft ● Cartridge door ● Transfer roller ● Registration assembly ● Tray 1 pickup roller ● Tray 2 pickup roller ● Separation pad 76 Chapter 5 Removal and replacement ENWW
Service Manual
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...is the subject of -page sensor Figure 5-1 Parts removal diagram ENWW Introduction 79 Control panel Automatic document feeder (ADF) Transfer roller Tray 1 pickup roller Tray 2 pickup roller Right-side cover Formatter shield Disk drive Formatter Fax cover Left-side cover Back cover I/O cover Fuser Access plate Oblique...-supply Front, right cover Right-side fan Cartridge door All covers and the ADF/scanner assembly Left-side riser Laser/scanner E-label reader Face-down-roller shaft Left-side fan Fax accessory Disk drive Formatter Stapler Stapler power-supply Right-side fan ECU Tray 1 solenoid...
...is the subject of -page sensor Figure 5-1 Parts removal diagram ENWW Introduction 79 Control panel Automatic document feeder (ADF) Transfer roller Tray 1 pickup roller Tray 2 pickup roller Right-side cover Formatter shield Disk drive Formatter Fax cover Left-side cover Back cover I/O cover Fuser Access plate Oblique...-supply Front, right cover Right-side fan Cartridge door All covers and the ADF/scanner assembly Left-side riser Laser/scanner E-label reader Face-down-roller shaft Left-side fan Fax accessory Disk drive Formatter Stapler Stapler power-supply Right-side fan ECU Tray 1 solenoid...
Service Manual
Page 194
...two tabs at the left end of the transfer roller has a spring attached. Release the left end of the transfer roller by using needle-nose pliers or a small flatblade screwdriver to touch the surface of the transfer roller. Lift the transfer roller out of the roller, the spring is not captive on the ...bottom of the roller is attached to the device rather than to release the other end. 4. At the right ...
...two tabs at the left end of the transfer roller has a spring attached. Release the left end of the transfer roller by using needle-nose pliers or a small flatblade screwdriver to touch the surface of the transfer roller. Lift the transfer roller out of the roller, the spring is not captive on the ...bottom of the roller is attached to the device rather than to release the other end. 4. At the right ...
Service Manual
Page 215
... jam has occurred because paper has wrapped around the fuser. Verify that the fuser motor (M2) connector is hard-wired to print the transferred data (some OK the available memory. If they do not rotate, verify the connection. 13.15.00 - Jam inside front door Media... messages (continued) Control panel message Description Recommended action 13.05.00 Jam inside front door Media is functional, observe the output stacker rollers while turning on page 220. Jam inside front door Paper failed to reach the delivery sensor 1. print cartridge Follow the instructions in ...
... jam has occurred because paper has wrapped around the fuser. Verify that the fuser motor (M2) connector is hard-wired to print the transferred data (some OK the available memory. If they do not rotate, verify the connection. 13.15.00 - Jam inside front door Media... messages (continued) Control panel message Description Recommended action 13.05.00 Jam inside front door Media is functional, observe the output stacker rollers while turning on page 220. Jam inside front door Paper failed to reach the delivery sensor 1. print cartridge Follow the instructions in ...
Service Manual
Page 250
Find the distance between identical defects and use the figure below to the first occurrence of repetitive image defects to help solve image quality problems. Place the ruler next to identify the component that is causing the defect. 0mm PRIMARY CHARGING ROLLER 38mm TRANSFER ROLLER 43.6mm DEVELOPER 47mm PRESSURE ROLLER 62mm FUSER 76mm OPTICAL PHOTO CONDUCTOR 96mm 238 Chapter 6 Troubleshooting ENWW Image defect ruler Use a ruler to measure occurrences of the defect on the page.
Find the distance between identical defects and use the figure below to the first occurrence of repetitive image defects to help solve image quality problems. Place the ruler next to identify the component that is causing the defect. 0mm PRIMARY CHARGING ROLLER 38mm TRANSFER ROLLER 43.6mm DEVELOPER 47mm PRESSURE ROLLER 62mm FUSER 76mm OPTICAL PHOTO CONDUCTOR 96mm 238 Chapter 6 Troubleshooting ENWW Image defect ruler Use a ruler to measure occurrences of the defect on the page.
Service Manual
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... the print cartridge. 3. Replace the transfer roller (see Transfer roller on page 15. 4. The media might be worn or contaminated. Make sure that the print cartridge is too moist or too rough). The toner level in the print cartridge might not meet HP specifications (for example, the paper is... fully installed. 2. See Media specifications on page 182. 250 Chapter 6 Troubleshooting ENWW The transfer roller might be low. See Curl or wave on page 256 See Wrinkles...
... the print cartridge. 3. Replace the transfer roller (see Transfer roller on page 15. 4. The media might be worn or contaminated. Make sure that the print cartridge is too moist or too rough). The toner level in the print cartridge might not meet HP specifications (for example, the paper is... fully installed. 2. See Media specifications on page 182. 250 Chapter 6 Troubleshooting ENWW The transfer roller might be low. See Curl or wave on page 256 See Wrinkles...
Service Manual
Page 263
...a different type of the device and run a cleaning page to see High-voltage power supply (HVPS) on a page after a jam has been cleared. 1. If the transfer roller is leaking, replace it . 8. The print cartridge might be defective or installed incorrectly. See the user guide. 4. Specks Specks might be defective. The fuser might... 5. Replace the fuser Fuser on page 40.) 3. The print cartridge might appear on page 149. ENWW Troubleshoot print-quality problems 251 Make sure that the transfer roller is turned off at the device control panel. Light print (entire page) 1.
...a different type of the device and run a cleaning page to see High-voltage power supply (HVPS) on a page after a jam has been cleared. 1. If the transfer roller is leaking, replace it . 8. The print cartridge might be defective or installed incorrectly. See the user guide. 4. Specks Specks might be defective. The fuser might... 5. Replace the fuser Fuser on page 40.) 3. The print cartridge might appear on page 149. ENWW Troubleshoot print-quality problems 251 Make sure that the transfer roller is turned off at the device control panel. Light print (entire page) 1.
Service Manual
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...see if the problem corrects itself. 2. If the image defect persists, replace the transfer roller. 7. The power supply might be defective. Dropouts 1. The print cartridge might be damaged, dirty, or worn. Fuser rollers might be defective. If the image defect persists, replace the fuser (see High... Clean the device on page 149. If the paper is very dirty). Replace the print cartridge. 252 Chapter 6 Troubleshooting ENWW The transfer roller might be required if the fuser is rough, and the toner easily rubs off, open the Print Quality menu at the device control...
...see if the problem corrects itself. 2. If the image defect persists, replace the transfer roller. 7. The power supply might be defective. Dropouts 1. The print cartridge might be damaged, dirty, or worn. Fuser rollers might be defective. If the image defect persists, replace the fuser (see High... Clean the device on page 149. If the paper is very dirty). Replace the print cartridge. 252 Chapter 6 Troubleshooting ENWW The transfer roller might be required if the fuser is rough, and the toner easily rubs off, open the Print Quality menu at the device control...
Service Manual
Page 295
... of 6) Ref Description 1 Bushing, transfer, right 2 Transfer roller assembly 3 Pad, separation 4 Guide, feed 5 Cover, registration 6 Arm, pad 7 Gear, 12T 8 Eliminator, static charge 9 Lever, sensor 10 Spring, torsion 11 Spring, torsion 12 Lever 13 Spring, torsion 14 Roller, tray 1 pick-up 15 Screw,... 16 Sheet, static charge 17 Sheet, static charge 18 Spring, compression 19 Registration assembly 20 Tray 1 pickup roller assembly 21 Transfer guide assembly, lower 22 Stopper, gear 23 Spring, compression 24 Arm, width-sensor 25 Spring, torsion 26 ...
... of 6) Ref Description 1 Bushing, transfer, right 2 Transfer roller assembly 3 Pad, separation 4 Guide, feed 5 Cover, registration 6 Arm, pad 7 Gear, 12T 8 Eliminator, static charge 9 Lever, sensor 10 Spring, torsion 11 Spring, torsion 12 Lever 13 Spring, torsion 14 Roller, tray 1 pick-up 15 Screw,... 16 Sheet, static charge 17 Sheet, static charge 18 Spring, compression 19 Registration assembly 20 Tray 1 pickup roller assembly 21 Transfer guide assembly, lower 22 Stopper, gear 23 Spring, compression 24 Arm, width-sensor 25 Spring, torsion 26 ...
Service Manual
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Alphabetical parts list Table 7-11 Alphabetical parts list Description ADF assembly ADF feed roller kit Arm, door Arm, pad Arm, width-sensor Bushing Bushing, inner Bushing, transfer, right Cable assembly Cable guide Cable guide Cable guide Cable guide Cable, delivery sensor Cable, memory tag Cable, option interface Cable, sensor, tray 2 Cam Cam, ...
Alphabetical parts list Table 7-11 Alphabetical parts list Description ADF assembly ADF feed roller kit Arm, door Arm, pad Arm, width-sensor Bushing Bushing, inner Bushing, transfer, right Cable assembly Cable guide Cable guide Cable guide Cable guide Cable, delivery sensor Cable, memory tag Cable, option interface Cable, sensor, tray 2 Cam Cam, ...
Service Manual
Page 312
..., right-side fan Stay, tag holder Stopper, cartridge, left Stopper, cartridge, right Stopper, feed guide, left Stopper, fuser Stopper, gear Top cover assembly Transfer guide assembly, lower Transfer roller assembly Tray, staple Tray 1 assembly Tray 1 cover assembly Part number RU5-2403-000CN RU5-2410-020CN RC1-4028-000CN RC1-4059-000CN RC1-4061...
..., right-side fan Stay, tag holder Stopper, cartridge, left Stopper, cartridge, right Stopper, feed guide, left Stopper, fuser Stopper, gear Top cover assembly Transfer guide assembly, lower Transfer roller assembly Tray, staple Tray 1 assembly Tray 1 cover assembly Part number RU5-2403-000CN RU5-2410-020CN RC1-4028-000CN RC1-4059-000CN RC1-4061...
Service Manual
Page 319
...) Part number Description RL1-1723-000CN Cover, right front RM1-1485-000CN Roller stay assembly RM1-1490-000CN RM1-1497-000CN Tray 1 assembly Roller assembly, delivery RM1-1506-000CN Position guide assembly RM1-1508-000CN Transfer roller assembly RM1-1521-030CN Laser/scanner assembly RM1-1522-000CN Drive release assembly RM1-3712-000CN Gear assembly...
...) Part number Description RL1-1723-000CN Cover, right front RM1-1485-000CN Roller stay assembly RM1-1490-000CN RM1-1497-000CN Tray 1 assembly Roller assembly, delivery RM1-1506-000CN Position guide assembly RM1-1508-000CN Transfer roller assembly RM1-1521-030CN Laser/scanner assembly RM1-1522-000CN Drive release assembly RM1-3712-000CN Gear assembly...
Service Manual
Page 363
... 199, 243 smeared toner, troubleshooting 253 SMTP gateway errors 213 software embedded Web server 13, 235 HP Easy Printer Care 14 HP Printer Utility 52 HP Toolbox 47 HP Web Jetadmin 13 Macintosh 12, 14 ordering 270 settings 10 supported operating systems 7 system requirements 7 uninstalling...69 tire tracks, troubleshooting 258 toner density setting 53 EconoMode 38 output quality, troubleshooting 253 Toolbox. See HP Toolbox tools, required 78 top cover, removing 105 top output bin, locating 5 total page count 228 transfer roller locating 68 removing 182 transfer stage 66 ENWW Index 351
... 199, 243 smeared toner, troubleshooting 253 SMTP gateway errors 213 software embedded Web server 13, 235 HP Easy Printer Care 14 HP Printer Utility 52 HP Toolbox 47 HP Web Jetadmin 13 Macintosh 12, 14 ordering 270 settings 10 supported operating systems 7 system requirements 7 uninstalling...69 tire tracks, troubleshooting 258 toner density setting 53 EconoMode 38 output quality, troubleshooting 253 Toolbox. See HP Toolbox tools, required 78 top cover, removing 105 top output bin, locating 5 total page count 228 transfer roller locating 68 removing 182 transfer stage 66 ENWW Index 351