HP LaserJet M4345 MFP - Software Technical Reference (external)
Page 183
... achieve the best print quality when printing on the Device Settings tab the Properties print-driver tabs. Use this setting on all HP LaserJet M4345 MFP models for media types that the automatic duplexing unit does not support, such as print mode. To make the Print on Both... feature, except for media types that cannot be printed on both sides (such as fuser temperature and print speed) to print on the second side: ● Plain ● Preprinted HP drivers for the HP LaserJet M4345 MFP models that is available in the driver. Manually printing on the second side of settings...
... achieve the best print quality when printing on the Device Settings tab the Properties print-driver tabs. Use this setting on all HP LaserJet M4345 MFP models for media types that the automatic duplexing unit does not support, such as print mode. To make the Print on Both... feature, except for media types that cannot be printed on both sides (such as fuser temperature and print speed) to print on the second side: ● Plain ● Preprinted HP drivers for the HP LaserJet M4345 MFP models that is available in the driver. Manually printing on the second side of settings...
HP LaserJet M4345 MFP - User Guide
Page 80
... margins The following gives typical address margins for laser printers. Never print on the same sheet of labels more than one flap that folds over the area where the envelope's seams meet. Labels CAUTION To avoid damaging the MFP, use adhesives compatible with more than once or print...peel-off adhesive strip or with the heat and pressure in an envelope, creating an air bubble, then the envelope might even damage the fuser. The extra flaps and strips might cause wrinkling, creasing, or even jams and might wrinkle during printing. For more information, see Printing...
... margins The following gives typical address margins for laser printers. Never print on the same sheet of labels more than one flap that folds over the area where the envelope's seams meet. Labels CAUTION To avoid damaging the MFP, use adhesives compatible with more than once or print...peel-off adhesive strip or with the heat and pressure in an envelope, creating an air bubble, then the envelope might even damage the fuser. The extra flaps and strips might cause wrinkling, creasing, or even jams and might wrinkle during printing. For more information, see Printing...
HP LaserJet M4345 MFP - User Guide
Page 97
... have been removed. For most printing situations, follow the guidelines in this option is selected, the MFP speed slows to 50transparencies can be loaded in tray1. ● A stack of up in the printer driver. ● Do not print on both sides of labels. ● Do not print on... the same time, try fanning the stack. ● Do not feed transparencies through the MFP more than once. CAUTION Failure to set the fuser mode to Low2 can permanently damage the MFP and fuser. ● In the printer driver, set the paper type to Transparency. ● At the control panel, touch Copy...
... have been removed. For most printing situations, follow the guidelines in this option is selected, the MFP speed slows to 50transparencies can be loaded in tray1. ● A stack of up in the printer driver. ● Do not print on both sides of labels. ● Do not print on... the same time, try fanning the stack. ● Do not feed transparencies through the MFP more than once. CAUTION Failure to set the fuser mode to Low2 can permanently damage the MFP and fuser. ● In the printer driver, set the paper type to Transparency. ● At the control panel, touch Copy...
HP LaserJet M4345 MFP - User Guide
Page 98
... at a slower speed when set at High1 or High2. To take advantage of the paper to and touch Administration, touch Print Quality, and touch Fuser Modes. NOTE For more information about paper that has a special finish, such as Bond). Follow these types of paper that you are now coating...special finish Some paper has a special finish, such as Bond) to turn on paper that has a highly textured finish. Set the fuser mode to be printed on. NOTE The MFP might increase problems with the front side facing up , and the top, short edge toward the right. For tray1, load the ...
... at a slower speed when set at High1 or High2. To take advantage of the paper to and touch Administration, touch Print Quality, and touch Fuser Modes. NOTE For more information about paper that has a special finish, such as Bond). Follow these types of paper that you are now coating...special finish Some paper has a special finish, such as Bond) to turn on paper that has a highly textured finish. Set the fuser mode to be printed on. NOTE The MFP might increase problems with the front side facing up , and the top, short edge toward the right. For tray1, load the ...
HP LaserJet M4345 MFP - User Guide
Page 99
...top, short edge toward the right. Load small sizes, custom sizes, or heavy paper Custom-size paper can be printed using a higher fuser mode. Tray Tray1 Tray2 and optional 500sheet tray Minimum size Maximum size Supported weights 76x 127mm (3x5inches) 216x356mm (8.5x14inches) 60to200g/m2 (16to53lb)...) 216x356mm (8.5x14inches) 60to120g/m2 (16to32lb) Guidelines for specifications when printing on small sizes, custom sizes, and heavy paper. NOTE The MFP might slow the device speed or create other problems, such as laid or bond paper, see Load paper that you are using them ...
...top, short edge toward the right. Load small sizes, custom sizes, or heavy paper Custom-size paper can be printed using a higher fuser mode. Tray Tray1 Tray2 and optional 500sheet tray Minimum size Maximum size Supported weights 76x 127mm (3x5inches) 216x356mm (8.5x14inches) 60to200g/m2 (16to53lb)...) 216x356mm (8.5x14inches) 60to120g/m2 (16to32lb) Guidelines for specifications when printing on small sizes, custom sizes, and heavy paper. NOTE The MFP might slow the device speed or create other problems, such as laid or bond paper, see Load paper that you are using them ...
HP LaserJet M4345 MFP - User Guide
Page 192
...contact an HPauthorized service or support provider. (See the HP support flyer, or go to http://www.hp.com/support/ljm4345mfp.) 50.X FUSER ERROR A fuser error has occurred. on Turn the MFP off, and then turn off , and then turn the MFP on both sides of media required for the print ...the control-panel display, turn the MFP off then A temporary printing error has occurred. Remove third-party devices. Reseat the fuser. Turn the MFP off , and then turn the MFP on . If this message persists, contact an HPauthorized service or support provider. (See the HP support flyer, or go to ...
...contact an HPauthorized service or support provider. (See the HP support flyer, or go to http://www.hp.com/support/ljm4345mfp.) 50.X FUSER ERROR A fuser error has occurred. on Turn the MFP off, and then turn off , and then turn the MFP on both sides of media required for the print ...the control-panel display, turn the MFP off then A temporary printing error has occurred. Remove third-party devices. Reseat the fuser. Turn the MFP off , and then turn the MFP on . If this message persists, contact an HPauthorized service or support provider. (See the HP support flyer, or go to ...
HP LaserJet M4345 MFP - User Guide
Page 197
... feeder Media is available in the document feeder. Contact administrator. the requested feature. Order cartridge The number of toner. The MFP was typed incorrectly. A digital-sending feature has been configured, but a network connection is incorrect. Empty the bin to be... e-mail problems. Contact the network administrator. Non HP supply installed Economode disabled A non-HP supply or a refilled HP supply has been installed. PAPER WRAPPED AROUND FUSER A jam has occurred because paper has wrapped around the fuser. The user name or password was set to ...
... feeder Media is available in the document feeder. Contact administrator. the requested feature. Order cartridge The number of toner. The MFP was typed incorrectly. A digital-sending feature has been configured, but a network connection is incorrect. Empty the bin to be... e-mail problems. Contact the network administrator. Non HP supply installed Economode disabled A non-HP supply or a refilled HP supply has been installed. PAPER WRAPPED AROUND FUSER A jam has occurred because paper has wrapped around the fuser. The user name or password was set to ...
Service Manual
Page 8
...firmware 104 Upgrading the HP Jetdirect firmware 105 Calibrate the scanner ...106 Calibrate the control panel ...107 Disable Embedded Jetdirect I/O ...108 Select the MFP language ...109 4 Theory of operation Basic operation ...112 Sequence of operation (printer 112 Sequence of ...HP Memory Enhancement technology 116 PJL overview ...116 PML ...116 Control panel ...116 Scanner interface ...116 Engine-control system ...117 DC controller PCA ...117 Motors and fans ...119 Motor and fan functions 119 Ambient-temperature detection 120 Engine power supply circuit 120 Fuser control ...121 Fuser...
...firmware 104 Upgrading the HP Jetdirect firmware 105 Calibrate the scanner ...106 Calibrate the control panel ...107 Disable Embedded Jetdirect I/O ...108 Select the MFP language ...109 4 Theory of operation Basic operation ...112 Sequence of operation (printer 112 Sequence of ...HP Memory Enhancement technology 116 PJL overview ...116 PML ...116 Control panel ...116 Scanner interface ...116 Engine-control system ...117 DC controller PCA ...117 Motors and fans ...119 Motor and fan functions 119 Ambient-temperature detection 120 Engine power supply circuit 120 Fuser control ...121 Fuser...
Service Manual
Page 11
...220 Removal and replacement strategy 221 Required tools ...221 Before performing service 221 After completing service 222 Screws that are used in the MFP 222 User-replaceable parts ...224 Print cartridge ...224 Control-panel overlays ...224 Control panel ...225 Transfer roller ...226 ADF input ...feed rollers 228 ADF separation pad ...229 ADF delivery guide (clear mylar sheet 231 Output-bin assembly ...233 Duplex-printing unit ...234 Fuser-entrance guide ...235 Fuser ...235 Tray 2, 3, 4, or 5 pickup and feed rollers 236 Tray 1 pickup roller ...237 Scanner filter cover and scanner filter ...
...220 Removal and replacement strategy 221 Required tools ...221 Before performing service 221 After completing service 222 Screws that are used in the MFP 222 User-replaceable parts ...224 Print cartridge ...224 Control-panel overlays ...224 Control panel ...225 Transfer roller ...226 ADF input ...feed rollers 228 ADF separation pad ...229 ADF delivery guide (clear mylar sheet 231 Output-bin assembly ...233 Duplex-printing unit ...234 Fuser-entrance guide ...235 Fuser ...235 Tray 2, 3, 4, or 5 pickup and feed rollers 236 Tray 1 pickup roller ...237 Scanner filter cover and scanner filter ...
Service Manual
Page 34
Envelopes should be stored flat. Labels CAUTION To avoid damaging the MFP, use only labels recommended for a commercial #10 or DL envelope. Never print on the same sheet of labels more than once or print on a partial ... the envelope might even damage the fuser. Transparencies Transparencies used in the printer must be able to seal must lie flat with no closer than 13 mm (0.5 inch) of curl in any direction. ● Condition: Do not use labels with the heat and pressure in HP LaserJet printers, such as HP-brand transparencies. 16 Chapter 1 Product...
Envelopes should be stored flat. Labels CAUTION To avoid damaging the MFP, use only labels recommended for a commercial #10 or DL envelope. Never print on the same sheet of labels more than once or print on a partial ... the envelope might even damage the fuser. Transparencies Transparencies used in the printer must be able to seal must lie flat with no closer than 13 mm (0.5 inch) of curl in any direction. ● Condition: Do not use labels with the heat and pressure in HP LaserJet printers, such as HP-brand transparencies. 16 Chapter 1 Product...
Service Manual
Page 138
... circuit, the high-voltage circuit, and the lowvoltage circuit. Ambient-temperature detection The MFP contains a sensor that other MFP components use (for changes in the fuser to signals from the DC controller PCA. The MFP automatically adjusts the temperature settings in the ambient temperature. The low-voltage circuit generates the DC voltages that measures...
... circuit, the high-voltage circuit, and the lowvoltage circuit. Ambient-temperature detection The MFP contains a sensor that other MFP components use (for changes in the fuser to signals from the DC controller PCA. The MFP automatically adjusts the temperature settings in the ambient temperature. The low-voltage circuit generates the DC voltages that measures...
Service Manual
Page 140
... To protect the fuser from excessive temperatures, the MFP has the following three protective functions: ● The CPU monitors the voltage of the heater exceeds about 250ºC (482ºF), the relay 1 (RL101) opens up to cut off the power supply to the fusing heater. If the fuser temperature reaches 240...cut off the power supply to the fusing heater. ● When the temperature of the thermistor. In the rare instance that this happens, the fuser must be replaced. Figure 4-4 Fuser circuit on page 123 illustrates the fuser circuit. 122 Chapter 4 Theory of operation ENWW
... To protect the fuser from excessive temperatures, the MFP has the following three protective functions: ● The CPU monitors the voltage of the heater exceeds about 250ºC (482ºF), the relay 1 (RL101) opens up to cut off the power supply to the fusing heater. If the fuser temperature reaches 240...cut off the power supply to the fusing heater. ● When the temperature of the thermistor. In the rare instance that this happens, the fuser must be replaced. Figure 4-4 Fuser circuit on page 123 illustrates the fuser circuit. 122 Chapter 4 Theory of operation ENWW
Service Manual
Page 143
.... This bias is weakened between pages to the transfer-charging roller when media is now visible on the photosensitive drum to the fuser sleeve. The fuser pressure-roller voltage (bias) prevents toner on the photosensitive drum from the power source into the direct current voltage (Vdc) that... supply requires. ● The DC controller generates the +5 Vdc that the laser/scanner and formatter require, and the +3.3 Vdc that the MFP components use. The high-voltage circuit on the photosensitive drum to clean residual toner off of developing biases are used to the media). electrostatic...
.... This bias is weakened between pages to the transfer-charging roller when media is now visible on the photosensitive drum to the fuser sleeve. The fuser pressure-roller voltage (bias) prevents toner on the photosensitive drum from the power source into the direct current voltage (Vdc) that... supply requires. ● The DC controller generates the +5 Vdc that the laser/scanner and formatter require, and the +3.3 Vdc that the MFP components use. The high-voltage circuit on the photosensitive drum to clean residual toner off of developing biases are used to the media). electrostatic...
Service Manual
Page 159
...extra toner from transferring from the photosensitive drum to prevent overheating. PS112 detects media that is detected, the DC controller adjusts the fuser temperature to the transfercharging roller. Cassette pickup operation The DC controller turns on the cassette pickup solenoid (SL101) and the main ...One sheet of media is attached to the pickup roller to determine if the media is narrower than 188 mm (7.4 inches). Media-size detection The MFP has three media-size detection systems: ● Cassette (trays 2, 3, 4, and 5) media-size detection ● Media-length detection ●...
...extra toner from transferring from the photosensitive drum to prevent overheating. PS112 detects media that is detected, the DC controller adjusts the fuser temperature to the transfercharging roller. Cassette pickup operation The DC controller turns on the cassette pickup solenoid (SL101) and the main ...One sheet of media is attached to the pickup roller to determine if the media is narrower than 188 mm (7.4 inches). Media-size detection The MFP has three media-size detection systems: ● Cassette (trays 2, 3, 4, and 5) media-size detection ● Media-length detection ●...
Service Manual
Page 166
...requested, the face-up solenoid (SL105) activates the face-up or face-down delivery When the fuser-delivery sensor (PS108) detects media, the crossing motor (M104) begins rotating. Face-down ,...setting. To stack pages of operation ENWW Figure 4-24 Fusing and reversing/delivery block Fusing The fuser applies heat and pressure to the media to permanently bond the toner image to the media, the ...media enters the reversing/delivery unit. The MFP can deliver the media to the output bin either face-up deflector to the output bin. When...
...requested, the face-up solenoid (SL105) activates the face-up or face-down delivery When the fuser-delivery sensor (PS108) detects media, the crossing motor (M104) begins rotating. Face-down ,...setting. To stack pages of operation ENWW Figure 4-24 Fusing and reversing/delivery block Fusing The fuser applies heat and pressure to the media to permanently bond the toner image to the media, the ...media enters the reversing/delivery unit. The MFP can deliver the media to the output bin either face-up deflector to the output bin. When...
Service Manual
Page 169
... of time after the media is picked up , the microprocessor on the DC controller PCA determines that a pickup jam has occurred. NOTE The MFP attempts to pick up , the microprocessor on the DC controller checks for example, four attempts occur if tray 1 is the source). The transport...and to check whether media is being fed correctly or has jammed: ● Pre-feed sensor (PS102) ● Top-of-page sensor (PS103) ● Fuser-delivery sensor (PS108) ● Paper-delivery sensor (PS109) ● Reversing paper-sensor (PS110) ● Reversing-unit paper-jam sensor (PS111) The microprocessor...
... of time after the media is picked up , the microprocessor on the DC controller PCA determines that a pickup jam has occurred. NOTE The MFP attempts to pick up , the microprocessor on the DC controller checks for example, four attempts occur if tray 1 is the source). The transport...and to check whether media is being fed correctly or has jammed: ● Pre-feed sensor (PS102) ● Top-of-page sensor (PS103) ● Fuser-delivery sensor (PS108) ● Paper-delivery sensor (PS109) ● Reversing paper-sensor (PS110) ● Reversing-unit paper-jam sensor (PS111) The microprocessor...
Service Manual
Page 171
...-up delivery If the paper-delivery sensor (PS109) does not detect the trailing edge of the media within a specific time period after the fuser-delivery sensor (PS108) detects the trailing edge, the microprocessor on the control-panel display. Delivery stationary jam during face-down delivery If the ... PCA drives each motor, and the residual media is sent to the output bin. ENWW Pickup, feed, and delivery system 153 Whenever the MFP is turned off, the microprocessor on the DC controller PCA detects that a delivery delay jam has occurred. Door-open jam has occurred. The...
...-up delivery If the paper-delivery sensor (PS109) does not detect the trailing edge of the media within a specific time period after the fuser-delivery sensor (PS108) detects the trailing edge, the microprocessor on the control-panel display. Delivery stationary jam during face-down delivery If the ... PCA drives each motor, and the residual media is sent to the output bin. ENWW Pickup, feed, and delivery system 153 Whenever the MFP is turned off, the microprocessor on the DC controller PCA detects that a delivery delay jam has occurred. Door-open jam has occurred. The...
Service Manual
Page 242
...two control-panel overlays (callout 1). 224 Chapter 5 Removal and replacement ENWW Grasp the print cartridge, and remove it from the MFP. User-replaceable parts The procedures in this section describe the removal and replacement of the following userreplaceable parts: ● Print cartridge...● ADF separation pad ● ADF delivery guide (clear mylar sheet) ● Output-bin assembly ● Duplex-printing unit ● Fuser-entrance guide ● Fuser ● Tray 2, 3, 4, or 5 pickup and feed rollers ● Tray 1 pickup roller ● Scanner filter cover and scanner filter ...
...two control-panel overlays (callout 1). 224 Chapter 5 Removal and replacement ENWW Grasp the print cartridge, and remove it from the MFP. User-replaceable parts The procedures in this section describe the removal and replacement of the following userreplaceable parts: ● Print cartridge...● ADF separation pad ● ADF delivery guide (clear mylar sheet) ● Output-bin assembly ● Duplex-printing unit ● Fuser-entrance guide ● Fuser ● Tray 2, 3, 4, or 5 pickup and feed rollers ● Tray 1 pickup roller ● Scanner filter cover and scanner filter ...
Service Manual
Page 253
... the following assemblies. ● Output bin. ● Duplex-printing unit. ● Fuser-entrance guide. Fuser-entrance guide 1. ENWW User-replaceable parts 235 Figure 5-20 Remove the fuser-entrance guide Fuser CAUTION The fuser is very hot. Flex the rear hinge-pin of the MFP and slide the guide to the left to cool for at least...
... the following assemblies. ● Output bin. ● Duplex-printing unit. ● Fuser-entrance guide. Fuser-entrance guide 1. ENWW User-replaceable parts 235 Figure 5-20 Remove the fuser-entrance guide Fuser CAUTION The fuser is very hot. Flex the rear hinge-pin of the MFP and slide the guide to the left to cool for at least...
Service Manual
Page 254
Squeeze the two blue tabs on the fuser to release the roller, and then slide the roller off of the MFP. Pinch the roller latch (callout 1) to release it, and then slide it out of the shaft. Remove the cassette from the tray. 2. Figure 5-21 Remove the fuser Tray 2, 3, 4, or 5 pickup and feed rollers 1. Figure 5-22 Remove the tray 2, 3, 4, or 5 pickup and feed rollers (1 of 2) 236 Chapter 5 Removal and replacement ENWW 2.
Squeeze the two blue tabs on the fuser to release the roller, and then slide the roller off of the MFP. Pinch the roller latch (callout 1) to release it, and then slide it out of the shaft. Remove the cassette from the tray. 2. Figure 5-21 Remove the fuser Tray 2, 3, 4, or 5 pickup and feed rollers 1. Figure 5-22 Remove the tray 2, 3, 4, or 5 pickup and feed rollers (1 of 2) 236 Chapter 5 Removal and replacement ENWW 2.