Service Manual
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ENWW Internal components...63 Timing...64 Engine control system...66 Laser/scanner system...68 Pickup/feed/delivery system...69 Image-formation system...71 Step 1: Primary charging 72 Step 2: Laser beam exposure 72 Step 3: Developing...73 Step 4: Transfer...73 ...Laser/scanner...103 Right-side handle...106 ECU...108 Access plate...114 Power supply...115 Gear assembly...120 Tray 1 solenoid...124 Tray 2 solenoid...125 E-label reader (memory tag 126 Face-down-roller shaft...128 Cartridge door...130 Transfer roller...133 Registration assembly...134 Tray 1 pickup roller...137 Tray 2 pickup roller...
ENWW Internal components...63 Timing...64 Engine control system...66 Laser/scanner system...68 Pickup/feed/delivery system...69 Image-formation system...71 Step 1: Primary charging 72 Step 2: Laser beam exposure 72 Step 3: Developing...73 Step 4: Transfer...73 ...Laser/scanner...103 Right-side handle...106 ECU...108 Access plate...114 Power supply...115 Gear assembly...120 Tray 1 solenoid...124 Tray 2 solenoid...125 E-label reader (memory tag 126 Face-down-roller shaft...128 Cartridge door...130 Transfer roller...133 Registration assembly...134 Tray 1 pickup roller...137 Tray 2 pickup roller...
Service Manual
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... tray 1 pickup roller 137 Removing the tray 2 pickup roller (1 of 2 138 Removing the tray 2 pickup roller (2 of 2 139 Removing the separation pad 140 Basic troubleshooting 143 Sample menu map page 151 Sample configuration page 152 Supplies status page 153 Jetdirect page 168 Main assemblies, HP LaserJet 2400 series 222 Main parts, HP LaserJet 2400 series 223 Sensors and switches, HP LaserJet 2400...
... tray 1 pickup roller 137 Removing the tray 2 pickup roller (1 of 2 138 Removing the tray 2 pickup roller (2 of 2 139 Removing the separation pad 140 Basic troubleshooting 143 Sample menu map page 151 Sample configuration page 152 Supplies status page 153 Jetdirect page 168 Main assemblies, HP LaserJet 2400 series 222 Main parts, HP LaserJet 2400 series 223 Sensors and switches, HP LaserJet 2400...
Service Manual
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Internal components Figure 5-2. Cross-section of printer 1 Top output-bin delivery roller 2 Fuser film 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 separation pad 10 Tray 2 pickup roller 11 Duplexer pickup roller 12 Feed roller 13 Transfer roller 14 Duplexer feed roller 15 Oblique roller 16 Pressure roller 17 Fuser-delivery roller ENWW Internal components 63 Cross-section of printer highlights the major internal components. Figure 5-2.
Internal components Figure 5-2. Cross-section of printer 1 Top output-bin delivery roller 2 Fuser film 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 separation pad 10 Tray 2 pickup roller 11 Duplexer pickup roller 12 Feed roller 13 Transfer roller 14 Duplexer feed roller 15 Oblique roller 16 Pressure roller 17 Fuser-delivery roller ENWW Internal components 63 Cross-section of printer highlights the major internal components. Figure 5-2.
Service Manual
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... the formatter or the power is turned off. PRINT LSTR (last rotation) From the end of a print cartridge. After LSTR, the printer either a print command is turned on the photosensitive drum and transfers the toner image to receive print commands INTR (initial From the time ...From power-on until Prepares the photosensitive drum for rotation) the pickup solenoid is sent from the drum surface and cleans the transfer roller. The fuser heater reaches a surface temperature of 120°C. 7 Fuser-motor initial drive 8 Laser/scanner-motor initial drive 64 Chapter 5 Theory of the WAIT ...
... the formatter or the power is turned off. PRINT LSTR (last rotation) From the end of a print cartridge. After LSTR, the printer either a print command is turned on the photosensitive drum and transfers the toner image to receive print commands INTR (initial From the time ...From power-on until Prepares the photosensitive drum for rotation) the pickup solenoid is sent from the drum surface and cleans the transfer roller. The fuser heater reaches a surface temperature of 120°C. 7 Fuser-motor initial drive 8 Laser/scanner-motor initial drive 64 Chapter 5 Theory of the WAIT ...
Service Manual
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...printer. If media does not reach or pass each sensor within a specified time period, the dc controller determines that a jam has occurred and alerts the formatter. The dc controller uses two motors and two solenoids to drive the rollers. Pickup/feed/delivery system The pickup.../feed/delivery system consists of several types of -page sensor ● PS902, tray 1 media-detection sensor ENWW Pickup/feed/delivery system 69 The following components are identified in Figure 5-6. Pickup/feed/delivery system: ●...
...printer. If media does not reach or pass each sensor within a specified time period, the dc controller determines that a jam has occurred and alerts the formatter. The dc controller uses two motors and two solenoids to drive the rollers. Pickup/feed/delivery system The pickup.../feed/delivery system consists of several types of -page sensor ● PS902, tray 1 media-detection sensor ENWW Pickup/feed/delivery system 69 The following components are identified in Figure 5-6. Pickup/feed/delivery system: ●...
Service Manual
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... Formatter...94 Fuser...98 Laser/scanner...103 Right-side handle...106 ECU...108 Access plate...114 Power supply...115 Gear assembly...120 Tray 1 solenoid...124 Tray 2 solenoid...125 E-label reader (memory tag 126 Face-down-roller shaft...128 Cartridge door...130 Transfer roller...133 Registration assembly...134 Tray 1 pickup roller...137 Tray 2 pickup roller...138 Separation pad...
... Formatter...94 Fuser...98 Laser/scanner...103 Right-side handle...106 ECU...108 Access plate...114 Power supply...115 Gear assembly...120 Tray 1 solenoid...124 Tray 2 solenoid...125 E-label reader (memory tag 126 Face-down-roller shaft...128 Cartridge door...130 Transfer roller...133 Registration assembly...134 Tray 1 pickup roller...137 Tray 2 pickup roller...138 Separation pad...
Service Manual
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... service this product: ● #2 Phillips screwdriver with other internal components and can be difficult to ESD. CAUTION User-replaceable parts To remove and replace the pickup roller or separation pad, see Separation pad. Directions for the ESD symbol (shown at an ESD-protected workstation, or use an ESD mat. WARNING! When reconnecting...
... service this product: ● #2 Phillips screwdriver with other internal components and can be difficult to ESD. CAUTION User-replaceable parts To remove and replace the pickup roller or separation pad, see Separation pad. Directions for the ESD symbol (shown at an ESD-protected workstation, or use an ESD mat. WARNING! When reconnecting...
Service Manual
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Parts removal order Use the following diagram to determine which parts must be removed before removing other parts. Transfer roller Print cartridge Tray 2 Tray 2 pickup roller Separation pad Right cover Formatter Right side handle Back cover Cartridge door Registration assembly Duplexer pan Fuser Laser/scanner I/O cover Left side cover Top right cover Top cover Front right cover Control panel E-label reader Face-down roller Shaft ECU Power supply Gear assembly Tray 1 solenoid Tray 2 solenoid Parts removal diagram 80 Chapter 6 Removal and replacement ENWW Figure 6-1.
Parts removal order Use the following diagram to determine which parts must be removed before removing other parts. Transfer roller Print cartridge Tray 2 Tray 2 pickup roller Separation pad Right cover Formatter Right side handle Back cover Cartridge door Registration assembly Duplexer pan Fuser Laser/scanner I/O cover Left side cover Top right cover Top cover Front right cover Control panel E-label reader Face-down roller Shaft ECU Power supply Gear assembly Tray 1 solenoid Tray 2 solenoid Parts removal diagram 80 Chapter 6 Removal and replacement ENWW Figure 6-1.
Service Manual
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Rotate the top of the roller off of the shaft, and then lift the roller out of the tray 1 pickup roller to release the roller. Removing the tray 1 pickup roller 2. ENWW Tray 1 pickup roller 137 Spread the pickup-roller locks (callout 1) on each side of the printer. Figure 6-58. Tray 1 pickup roller 1.
Rotate the top of the roller off of the shaft, and then lift the roller out of the tray 1 pickup roller to release the roller. Removing the tray 1 pickup roller 2. ENWW Tray 1 pickup roller 137 Spread the pickup-roller locks (callout 1) on each side of the printer. Figure 6-58. Tray 1 pickup roller 1.
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Rotate the bushings (callout 1) on each side of the shaft. 138 Chapter 6 Removal and replacement ENWW Slide the roller and shaft toward the left . 3. Tray 2 pickup roller NOTE Also follow these instructions to the left until they clear the hole in the right-side bushing, and then lift the right end of the roller. Removing the tray 2 pickup roller (1 of 2) 2. Remove the left-side bushing by sliding the bushing to remove any optional-tray pickup rollers. 1. Figure 6-59.
Rotate the bushings (callout 1) on each side of the shaft. 138 Chapter 6 Removal and replacement ENWW Slide the roller and shaft toward the left . 3. Tray 2 pickup roller NOTE Also follow these instructions to the left until they clear the hole in the right-side bushing, and then lift the right end of the roller. Removing the tray 2 pickup roller (1 of 2) 2. Remove the left-side bushing by sliding the bushing to remove any optional-tray pickup rollers. 1. Figure 6-59.
Service Manual
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Slide the roller and shaft toward the right and lift the roller and shaft together out of 2) ENWW Tray 2 pickup roller 139 4. Figure 6-60. Removing the tray 2 pickup roller (2 of the printer.
Slide the roller and shaft toward the right and lift the roller and shaft together out of 2) ENWW Tray 2 pickup roller 139 4. Figure 6-60. Removing the tray 2 pickup roller (2 of the printer.
Service Manual
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Table 8-8. Alphabetical parts list (continued) Description Part number Tray 1 pick-up shaft assembly RM1-1484-000CN Tray 2 pickup assembly RM1-1481-000CN Tray 2 pickup assembly RM1-1481-000CN Tray 2 pickup roller RL1-0542-000CN Table and page Table 8-6 on page 251 Table 8-4 on page 246 Table 8-7 on page 255 Table 8-7 on page 255 ENWW Alphabetical parts list 261
Table 8-8. Alphabetical parts list (continued) Description Part number Tray 1 pick-up shaft assembly RM1-1484-000CN Tray 2 pickup assembly RM1-1481-000CN Tray 2 pickup assembly RM1-1481-000CN Tray 2 pickup roller RL1-0542-000CN Table and page Table 8-6 on page 251 Table 8-4 on page 246 Table 8-7 on page 255 Table 8-7 on page 255 ENWW Alphabetical parts list 261
Service Manual
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...-0528-000CN Solenoid, cassette RK2-0534-000CN Microswitch RK2-0571-000CN Fan RK2-0573-000CN Fan, sub RL1-0542-000CN Tray 2 pickup roller RL1-0568-000CN Roller, tray 1 pick-up RL1-0580-000CN Roller, face-down RL1-0581-000CN Plate, transfer, lower RL1-0587-000CN Motor, dc, 26.2 W RM1-1401-000CN Fuser, 110-127...
...-0528-000CN Solenoid, cassette RK2-0534-000CN Microswitch RK2-0571-000CN Fan RK2-0573-000CN Fan, sub RL1-0542-000CN Tray 2 pickup roller RL1-0568-000CN Roller, tray 1 pick-up RL1-0580-000CN Roller, face-down RL1-0581-000CN Plate, transfer, lower RL1-0587-000CN Motor, dc, 26.2 W RM1-1401-000CN Fuser, 110-127...
Service Manual
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... assembly RM1-1435-000CN Sensor pcb assembly RM1-1481-000CN Tray 2 pickup assembly RM1-1481-000CN Tray 2 pickup assembly RM1-1482-000CN Pick-up roller gear assembly RM1-1484-000CN Tray 1 pick-up shaft assembly RM1-1485-000CN Roller stay assembly RM1-1490-000CN Multi-purpose tray assembly RM1-1500-000CN ...-000CN Top cover assembly RM1-1516-000CN ECU, 110-127 V RM1-1517-000CN Rear cover assembly RM1-1519-000CN Control panel RM1-1521-000CN Laser/scanner assembly RM1-1522-000CN Drive release assembly RM1-1523-000CN Tray 1 cover assembly RM1-1524-000CN ECU, 220-240 V RM1-1531-000CN ...
... assembly RM1-1435-000CN Sensor pcb assembly RM1-1481-000CN Tray 2 pickup assembly RM1-1481-000CN Tray 2 pickup assembly RM1-1482-000CN Pick-up roller gear assembly RM1-1484-000CN Tray 1 pick-up shaft assembly RM1-1485-000CN Roller stay assembly RM1-1490-000CN Multi-purpose tray assembly RM1-1500-000CN ...-000CN Top cover assembly RM1-1516-000CN ECU, 110-127 V RM1-1517-000CN Rear cover assembly RM1-1519-000CN Control panel RM1-1521-000CN Laser/scanner assembly RM1-1522-000CN Drive release assembly RM1-1523-000CN Tray 1 cover assembly RM1-1524-000CN ECU, 220-240 V RM1-1531-000CN ...
Service Manual
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...models including 5 troubleshooting 167 noise specifications 10 non-HP print cartridges 53, 197 not responding, troubleshooting 171 NVRAM initialization 164 O oblique roller 63 on/off switch 3 operations, sequence of ...pickup roller, tray 1 locating 63 removing 137 pickup roller, tray 2 locating 63 removing 138 pickup/feed/delivery operations 69 PIN codes, service 161 platforms supported 25, 26 ports buffer overflow 186 connecting to 24 included 5 locating 3 LPT error messages 213 troubleshooting 167 troubleshooting Macintosh 215, 218 PostScript error pages troubleshooting 146 PostScript Printer...
...models including 5 troubleshooting 167 noise specifications 10 non-HP print cartridges 53, 197 not responding, troubleshooting 171 NVRAM initialization 164 O oblique roller 63 on/off switch 3 operations, sequence of ...pickup roller, tray 1 locating 63 removing 137 pickup roller, tray 2 locating 63 removing 138 pickup/feed/delivery operations 69 PIN codes, service 161 platforms supported 25, 26 ports buffer overflow 186 connecting to 24 included 5 locating 3 LPT error messages 213 troubleshooting 167 troubleshooting Macintosh 215, 218 PostScript error pages troubleshooting 146 PostScript Printer...
Service Manual
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... 274 Index right-side cover locating 2 removing 81 right-side handle, removing 106 rollers diagrams 223 face-down shaft, removing 128 locating 63 transfer, removing 133 tray 1 pickup, removing 137 tray 2 pickup, removing 138 S Save + Restore 165 screwdrivers, required 78 screws, replacing 78 ...specifications 9 settings 159 slow printing, troubleshooting 147, 170 smeared toner, troubleshooting 206 software HP Toolbox 44 Linux 26 Macintosh, included 27 operating systems supported 25 ordering 234 Printer Status and Alerts 156 solenoids diagrams 225 operations 69 tray 1, removing 124 tray 2, ...
... 274 Index right-side cover locating 2 removing 81 right-side handle, removing 106 rollers diagrams 223 face-down shaft, removing 128 locating 63 transfer, removing 133 tray 1 pickup, removing 137 tray 2 pickup, removing 138 S Save + Restore 165 screwdrivers, required 78 screws, replacing 78 ...specifications 9 settings 159 slow printing, troubleshooting 147, 170 smeared toner, troubleshooting 206 software HP Toolbox 44 Linux 26 Macintosh, included 27 operating systems supported 25 ordering 234 Printer Status and Alerts 156 solenoids diagrams 225 operations 69 tray 1, removing 124 tray 2, ...
Service Manual
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...alerts 46 Information tab, embedded Web server 41 lights, control panel 33 Printer Status and Alerts 156 supplies page, printing 51, 153 toner level, checking 54 viewing with HP Toolbox 45 Status tab, HP Toolbox 45 stopped printing, troubleshooting 147 storing envelopes 15 paper 13 storing print...78 top cover, removing 89 top right cover, removing 88 total page count 161 transfer roller locating 63 removing 133 transfer stage 73 transparencies, specifications 15 tray 1 locating 2 locking 37 manual feed 38 paper specifications 11 parts diagrams 223 pickup roller, removing 137 printing from 35, 36...
...alerts 46 Information tab, embedded Web server 41 lights, control panel 33 Printer Status and Alerts 156 supplies page, printing 51, 153 toner level, checking 54 viewing with HP Toolbox 45 Status tab, HP Toolbox 45 stopped printing, troubleshooting 147 storing envelopes 15 paper 13 storing print...78 top cover, removing 89 top right cover, removing 88 total page count 161 transfer roller locating 63 removing 133 transfer stage 73 transparencies, specifications 15 tray 1 locating 2 locking 37 manual feed 38 paper specifications 11 parts diagrams 223 pickup roller, removing 137 printing from 35, 36...
Service Manual
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...tray 2 locating 2 locking 37 paper specifications 11 part numbers 254 parts diagrams 223 pickup roller, removing 138 printing from 35 rollers 63 sensors 69, 224 solenoid, diagrams 225 solenoid, removing 125 See also trays ...error messages 183 276 Index fonts 220 formatter test 166 fuser errors 185 gray background 205 HP Jetdirect print servers 167 information pages 48 jams, causes of 173 jams, clearing print-cartridge... 183 permanent storage errors 193 PostScript problems 220 power-on bypass 165 print quality 201 Printer Status and Alerts 156 printing 146, 147, 171 PS errors 146 RAM disk errors ...
...tray 2 locating 2 locking 37 paper specifications 11 part numbers 254 parts diagrams 223 pickup roller, removing 138 printing from 35 rollers 63 sensors 69, 224 solenoid, diagrams 225 solenoid, removing 125 See also trays ...error messages 183 276 Index fonts 220 formatter test 166 fuser errors 185 gray background 205 HP Jetdirect print servers 167 information pages 48 jams, causes of 173 jams, clearing print-cartridge... 183 permanent storage errors 193 PostScript problems 220 power-on bypass 165 print quality 201 Printer Status and Alerts 156 printing 146, 147, 171 PS errors 146 RAM disk errors ...