Service Manual
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... Information 1-2 Identification 1-3 Specifications 1-5 HP LaserJet 4 and 4 Plus 1-5 Related Documentation 1-7 Safety Information 1-8 Product and Laser Safety 1-8 FCC RFI Statement 1-9 Laser Statement (Sweden/Finland 1-10 Toner Safety 1-11 Ozone Statement 1-11 Doing Business with HP 1-12 Technical Assistance 1-12 HP ASAP 1-800-333-1917 (U.S 1-12 HP FIRST 1-12 HP FIRST, U.S 1-12 HP FIRST, Europe 1-12 HP AUDIO-TIPS 1-13 HP CompuServe Forum 1-13...
... Information 1-2 Identification 1-3 Specifications 1-5 HP LaserJet 4 and 4 Plus 1-5 Related Documentation 1-7 Safety Information 1-8 Product and Laser Safety 1-8 FCC RFI Statement 1-9 Laser Statement (Sweden/Finland 1-10 Toner Safety 1-11 Ozone Statement 1-11 Doing Business with HP 1-12 Technical Assistance 1-12 HP ASAP 1-800-333-1917 (U.S 1-12 HP FIRST 1-12 HP FIRST, U.S 1-12 HP FIRST, Europe 1-12 HP AUDIO-TIPS 1-13 HP CompuServe Forum 1-13...
Service Manual
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... Board 3-59 Service / Error Messages 3-59 4 Preventive Maintenance Introduction 4-1 Life Expectancy of Consumables 4-2 Service Checkpoints 4-3 Cleaning Your Printer 4-4 Toner Cartridge 4-5 Saving Toner with EconoMode (HP LaserJet 4 Plus and 5 Only 4-6 Storing the Toner Cartridge 4-6 Installing the Toner Cartridge 4-7 Non-HP Toner Cartridges 4-9 Clearing the TONER LOW Message 4-10 Periodic Maintenance Procedures 4-11 Removing the MP Tray (Tray 1) Pickup Roller and Separation Pad...
... Board 3-59 Service / Error Messages 3-59 4 Preventive Maintenance Introduction 4-1 Life Expectancy of Consumables 4-2 Service Checkpoints 4-3 Cleaning Your Printer 4-4 Toner Cartridge 4-5 Saving Toner with EconoMode (HP LaserJet 4 Plus and 5 Only 4-6 Storing the Toner Cartridge 4-6 Installing the Toner Cartridge 4-7 Non-HP Toner Cartridges 4-9 Clearing the TONER LOW Message 4-10 Periodic Maintenance Procedures 4-11 Removing the MP Tray (Tray 1) Pickup Roller and Separation Pad...
Service Manual
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...Yes Yes No No Yes Yes Yes Yes Yes No No No No No No Yes Does it work in the HPLaserJet 4 Plus? The models HP C2021A and C2039A printers include the following features: • PostScript Level 2 SIMM • AppleTalk MIO Card • 4 MBytes of the SIMMs ... Memory (4 MByte) Memory (8 MByte) Memory (1 MByte) Memory (2 MByte) Memory (4 MByte) Memory (8 MByte) Memory (16 MByte) Duplex Assembly Toner Cartridge Does it work in the HP LaserJet 4, the printer will display a "53.1X.08 ERROR" (X indicates the position of RAM In every instance the repair procedures for all products are not...
...Yes Yes No No Yes Yes Yes Yes Yes No No No No No No Yes Does it work in the HPLaserJet 4 Plus? The models HP C2021A and C2039A printers include the following features: • PostScript Level 2 SIMM • AppleTalk MIO Card • 4 MBytes of the SIMMs ... Memory (4 MByte) Memory (8 MByte) Memory (1 MByte) Memory (2 MByte) Memory (4 MByte) Memory (8 MByte) Memory (16 MByte) Duplex Assembly Toner Cartridge Does it work in the HP LaserJet 4, the printer will display a "53.1X.08 ERROR" (X indicates the position of RAM In every instance the repair procedures for all products are not...
Service Manual
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Specifications HP LaserJet 4 and 4 Plus Table 1-3 Printer Dimensions Dimension HP LaserJet 4/4M (C2001A/C2021A) Width 16.4 in (416 mm) Depth 15.9 in (403 mm) Height 11.7 in (297 mm) Weight (with toner cartridge) 37 lbs. (18.3 kg) HP LaserJet 4 Plus HP LaserJet 4M Plus (C2037A/C2039A) 16.4 in (416 mm) 15.9 in (403 mm) 11.7 in (297 mm) 37 lbs. (18.3... = 55 220 Vac ± 10% 50/60 Hz ± 2 Hz printing = 195 240Vac ± 10% 50/60 Hz ± 2 Hz standby = 55 4 Plus/4M Plus printing = 300 standby = 80 PowerSave=25 printing =300 standby = 80 PowerSave=25 Product Information 1-5
Specifications HP LaserJet 4 and 4 Plus Table 1-3 Printer Dimensions Dimension HP LaserJet 4/4M (C2001A/C2021A) Width 16.4 in (416 mm) Depth 15.9 in (403 mm) Height 11.7 in (297 mm) Weight (with toner cartridge) 37 lbs. (18.3 kg) HP LaserJet 4 Plus HP LaserJet 4M Plus (C2037A/C2039A) 16.4 in (416 mm) 15.9 in (403 mm) 11.7 in (297 mm) 37 lbs. (18.3... = 55 220 Vac ± 10% 50/60 Hz ± 2 Hz printing = 195 240Vac ± 10% 50/60 Hz ± 2 Hz standby = 55 4 Plus/4M Plus printing = 300 standby = 80 PowerSave=25 printing =300 standby = 80 PowerSave=25 Product Information 1-5
Service Manual
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Table 1-6 Electrical Specifications Status 100/115 V 4/4M 4 Plus/4M Plus 220/240 V 4/4M 4 Plus/4M Plus Product Rating 6.4 amps 7.8 amps 3.1 amps 4.0 amps Peak Inrush Current 22 amps 22 amps 22 amps 22 amps 25% Decay Time 13 msec 18 ... 17 amps 22 amps Return-to Average Time 200 msec 200 msec 200 msec 200 msec Table 1-5 Environmental Specifications Operating Environment Storage Environment (not including toner cartridge) Temperature: 10° C to 32.5° C (50° F to 90.5° F) Humidity: 20-80% (no condensation) Temperature: -20° to 60° C (-4°...
Table 1-6 Electrical Specifications Status 100/115 V 4/4M 4 Plus/4M Plus 220/240 V 4/4M 4 Plus/4M Plus Product Rating 6.4 amps 7.8 amps 3.1 amps 4.0 amps Peak Inrush Current 22 amps 22 amps 22 amps 22 amps 25% Decay Time 13 msec 18 ... 17 amps 22 amps Return-to Average Time 200 msec 200 msec 200 msec 200 msec Table 1-5 Environmental Specifications Operating Environment Storage Environment (not including toner cartridge) Temperature: 10° C to 32.5° C (50° F to 90.5° F) Humidity: 20-80% (no condensation) Temperature: -20° to 60° C (-4°...
Service Manual
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...Remote Control Panel (Print Quality Category) or from software or printer drivers override any control panel settings. 3-16 Configuration Available settings are Light, Medium, Dark or Off. EconoMode (HP LaserJet 4 Plus and 5 only) The EconoMode setting uses approximately 50% less toner than standard mode printing by reducing dot density. Note REt...the DC Controller to produce "smoothed" black-to-white boundaries. The default setting is user selectable via a front panel key, a Printer Job Language (PJL) sequence using HP Explorer's Remote Control Panel or through application software.
...Remote Control Panel (Print Quality Category) or from software or printer drivers override any control panel settings. 3-16 Configuration Available settings are Light, Medium, Dark or Off. EconoMode (HP LaserJet 4 Plus and 5 only) The EconoMode setting uses approximately 50% less toner than standard mode printing by reducing dot density. Note REt...the DC Controller to produce "smoothed" black-to-white boundaries. The default setting is user selectable via a front panel key, a Printer Job Language (PJL) sequence using HP Explorer's Remote Control Panel or through application software.
Service Manual
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... a higher number, toner is only available in PostScript mode. Density Print density is 3, but you set for desktop publishing applications. The factory default setting is a measure of the darkness of methods to stabilize. Memory Enhancement technology (MEt) (HP LaserJet 4 Plus and 5 only) HP Memory Enhancement technology (MEt) effectively doubles the printer's standard memory through HP Explorer's Remote...
... a higher number, toner is only available in PostScript mode. Density Print density is 3, but you set for desktop publishing applications. The factory default setting is a measure of the darkness of methods to stabilize. Memory Enhancement technology (MEt) (HP LaserJet 4 Plus and 5 only) HP Memory Enhancement technology (MEt) effectively doubles the printer's standard memory through HP Explorer's Remote...
Service Manual
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... is associated with media, include 50-100 sheets of the media causing the problem. Packing the Printer Repackaging Instructions The printer warranty is available from HP's Support Material Organization (SMO) for a charge. Configuration 3-43 To order replacement packing and shipping...order the shipping box and packing inserts for the printers, ask for your service area. This includes: • Toner Cartridge • Optional Lower Cassette • Envelope Feeder • Accessory Cartridge • Duplex Assembly (LaserJet 4 Plus/5) • Optional Memory, Personality SIMMs, or...
... is associated with media, include 50-100 sheets of the media causing the problem. Packing the Printer Repackaging Instructions The printer warranty is available from HP's Support Material Organization (SMO) for a charge. Configuration 3-43 To order replacement packing and shipping...order the shipping box and packing inserts for the printers, ask for your service area. This includes: • Toner Cartridge • Optional Lower Cassette • Envelope Feeder • Accessory Cartridge • Duplex Assembly (LaserJet 4 Plus/5) • Optional Memory, Personality SIMMs, or...
Service Manual
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... selections. the maximum shelf life of storage including usage; Saving Toner with EconoMode (HP LaserJet 4 Plus and 5 Only) Toner cartridge life can be extended dramatically by using the EconoMode printing feature of the printer. EconoMode can be turned on or off via the printer control panel, through HP's Remote Control Panel or through a software application with the appropriate...
... selections. the maximum shelf life of storage including usage; Saving Toner with EconoMode (HP LaserJet 4 Plus and 5 Only) Toner cartridge life can be extended dramatically by using the EconoMode printing feature of the printer. EconoMode can be turned on or off via the printer control panel, through HP's Remote Control Panel or through a software application with the appropriate...
Service Manual
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... Checks and Action Required Input Area Jams 1. Seat the LC Tray firmly into the printer. False Paper Jams 1. Check that the cassettes are down (LJ4 and 4 Plus Only). 2. Ensure that the Toner Cartridge is not fully seated into the printer. 2. The LC Tray (Tray 3) is fully seated. 3. The Lower Cassette feed pressure (spring force...
... Checks and Action Required Input Area Jams 1. Seat the LC Tray firmly into the printer. False Paper Jams 1. Check that the cassettes are down (LJ4 and 4 Plus Only). 2. Ensure that the Toner Cartridge is not fully seated into the printer. 2. The LC Tray (Tray 3) is fully seated. 3. The Lower Cassette feed pressure (spring force...
Service Manual
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Main Motor Functional Checks • Inspect the gear train for wear and binding. • Reseat J211 (or J214 on the HP LaserJet 4 Plus/4M Plus) on the DC Controller PCA, and the main connector on the DC Controller. If the voltage is a 4-phase, DC servo motor controlled by the DC ... the gears in the printing process. If the voltage is present on the Main Motor Assembly. The Main Motor drives all moving components in the Toner Cartridge for debris that the +24B Voltage is not present, replace the DC Controller.
Main Motor Functional Checks • Inspect the gear train for wear and binding. • Reseat J211 (or J214 on the HP LaserJet 4 Plus/4M Plus) on the DC Controller PCA, and the main connector on the DC Controller. If the voltage is a 4-phase, DC servo motor controlled by the DC ... the gears in the printing process. If the voltage is present on the Main Motor Assembly. The Main Motor drives all moving components in the Toner Cartridge for debris that the +24B Voltage is not present, replace the DC Controller.
Service Manual
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...Yes Yes Yes Yes Yes Yes Yes Yes Yes No Yes Yes *If HP LaserJet 4 Plus/5 Optional Memory (C3130A, C3131A, C3132A, C3133 or C3146A) is installed in the LaserJet 4? B-4 LaserJet 5/5M/5N Printer Table B-2 Product Family Compatibility Matrix Accessory C2082A C2082B C3927A C2083A C2083D C3921A ...Memory (8 MByte) Memory (1 MByte) Memory (2 MByte) Memory (4 MByte) Memory (8 MByte) Memory (16 MByte) Duplex Assembly Duplex Assembly Toner Cartridge Work in the HP LaserJet 4, the printer will display a "53.1X.08 ERROR" (X indicates the position of the SIMMs slot). No Yes No No Yes No No Yes No ...
...Yes Yes Yes Yes Yes Yes Yes Yes Yes No Yes Yes *If HP LaserJet 4 Plus/5 Optional Memory (C3130A, C3131A, C3132A, C3133 or C3146A) is installed in the LaserJet 4? B-4 LaserJet 5/5M/5N Printer Table B-2 Product Family Compatibility Matrix Accessory C2082A C2082B C3927A C2083A C2083D C3921A ...Memory (8 MByte) Memory (1 MByte) Memory (2 MByte) Memory (4 MByte) Memory (8 MByte) Memory (16 MByte) Duplex Assembly Duplex Assembly Toner Cartridge Work in the HP LaserJet 4, the printer will display a "53.1X.08 ERROR" (X indicates the position of the SIMMs slot). No Yes No No Yes No No Yes No ...