Service Manual
Page 7
... 3-57 Personality SIMM (PostScript 3-58 Troubleshooting a SIMM 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...
... 3-57 Personality SIMM (PostScript 3-58 Troubleshooting a SIMM 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...
Service Manual
Page 10
...Guide Assembly 6-68 Interconnect PCA Removal 6-69 7 Troubleshooting LaserJet 5 Error Map 7-A Pre-Troubleshooting Procedures 7-1 Preliminary Operating Checks 7-1 Printer Message Troubleshooting 7-2 Printer Message Summary Table 7-2 Clearable Warnings 7-10 Printer Message Troubleshooting Procedures 7-12 Blank Display 7-12 MP/PC...7-24 14 NO EP CART Message 7-25 16 Toner Low Message 7-25 41.X ERROR Message 7-27 50 SERVICE Error - Fuser Malfunction 7-29 51 ERROR Message 7-31 52 ERROR Scanner Malfunction 7-32 Laser/Scanner Assembly Functional Checks . . . . . 7-32...
...Guide Assembly 6-68 Interconnect PCA Removal 6-69 7 Troubleshooting LaserJet 5 Error Map 7-A Pre-Troubleshooting Procedures 7-1 Preliminary Operating Checks 7-1 Printer Message Troubleshooting 7-2 Printer Message Summary Table 7-2 Clearable Warnings 7-10 Printer Message Troubleshooting Procedures 7-12 Blank Display 7-12 MP/PC...7-24 14 NO EP CART Message 7-25 16 Toner Low Message 7-25 41.X ERROR Message 7-27 50 SERVICE Error - Fuser Malfunction 7-29 51 ERROR Message 7-31 52 ERROR Scanner Malfunction 7-32 Laser/Scanner Assembly Functional Checks . . . . . 7-32...
Service Manual
Page 149
... 5-37 After the power is switched on -line," and the control panel keys become operational. Warmup Period The Warmup period begins when the printer's power is switched ON, the exhaust fan (FM1) begins low-speed rotation and the fusing roller maintains 172° C. Negative high voltage... at low-speed rotation. The motors stop rotation when the fuser reaches 172° C. At this point the printer is shut down, allowing the fuser to cool to room temperature without posting a 50 SERVICE error. PowerSave When the printer enters PowerSave mode, fuser current is in the Standby period.
... 5-37 After the power is switched on -line," and the control panel keys become operational. Warmup Period The Warmup period begins when the printer's power is switched ON, the exhaust fan (FM1) begins low-speed rotation and the fusing roller maintains 172° C. Negative high voltage... at low-speed rotation. The motors stop rotation when the fuser reaches 172° C. At this point the printer is shut down, allowing the fuser to cool to room temperature without posting a 50 SERVICE error. PowerSave When the printer enters PowerSave mode, fuser current is in the Standby period.
Service Manual
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Functional Overview 5-39 If a failure occurs during this period, the following errors may be displayed: 50 SERVICE This error occurs when the fusing roller fails to reach the correct temperature in the required time (see "50 SERVICE") in Chapter 7). 51 ERROR This error occurs when the BD signal is not received by the DC controller, (see "51 ERROR BEAM DETECT)" in Chapter 7). 52 ERROR This error occurs when the scanner motor fails (see "52 ERROR," Chapter 7).
Functional Overview 5-39 If a failure occurs during this period, the following errors may be displayed: 50 SERVICE This error occurs when the fusing roller fails to reach the correct temperature in the required time (see "50 SERVICE") in Chapter 7). 51 ERROR This error occurs when the BD signal is not received by the DC controller, (see "51 ERROR BEAM DETECT)" in Chapter 7). 52 ERROR This error occurs when the scanner motor fails (see "52 ERROR," Chapter 7).
Service Manual
Page 153
... voltage to a positive high voltage, to prepare to the correct temperature in the required time (see "50 SERVICE") in Chapter 7). 51 ERROR This error occurs when the BD signal is received (see "52 ERROR" in Chapter 7). 50 SERVICE This error occurs when the fusing roller fails to rise to transfer the toner image from the formatter...
... voltage to a positive high voltage, to prepare to the correct temperature in the required time (see "50 SERVICE") in Chapter 7). 51 ERROR This error occurs when the BD signal is received (see "52 ERROR" in Chapter 7). 50 SERVICE This error occurs when the fusing roller fails to rise to transfer the toner image from the formatter...
Service Manual
Page 235
... there was not the same as the computer. If the error persists, refer to clear this error. Table 7-1 Printer Messages (continued) Message Symptoms and Recommendations 22 ERROR For serial/Bi-Tronics parallel configuration, the computer and printer are using an RS232 serial connection, the HP LaserJet printer uses XON/XOFF and DTR signal protocols rather than one sheet...
... there was not the same as the computer. If the error persists, refer to clear this error. Table 7-1 Printer Messages (continued) Message Symptoms and Recommendations 22 ERROR For serial/Bi-Tronics parallel configuration, the computer and printer are using an RS232 serial connection, the HP LaserJet printer uses XON/XOFF and DTR signal protocols rather than one sheet...
Service Manual
Page 259
... temperature the resistance value of the fusing system is displayed, turn the printer OFF for over-temperature protection, and opens when the temperature reaches 230° C. Note If a 50 SERVICE error message is to replace the thermoprotector or fuser assembly if the thermoprotector opens...and its associated fusing and pressure rollers, a thermistor, thermoprotector, and the AC controller/safety circuitry in a fusing error: 1 Unable to cool before turning the printer ON results in printing mode, a temperature of around 183° C is a resistor whose value changes with ...
... temperature the resistance value of the fusing system is displayed, turn the printer OFF for over-temperature protection, and opens when the temperature reaches 230° C. Note If a 50 SERVICE error message is to replace the thermoprotector or fuser assembly if the thermoprotector opens...and its associated fusing and pressure rollers, a thermistor, thermoprotector, and the AC controller/safety circuitry in a fusing error: 1 Unable to cool before turning the printer ON results in printing mode, a temperature of around 183° C is a resistor whose value changes with ...
Service Manual
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... the printer. Is the Thermistor defective? 2. Use an ohmmeter and measure the continuity between pins (see Figure 7-6, callout 1). Note The 50 SERVICE error message can be cleared immediately by shorting the C202 leads on the HP LaserJet 4/4M (or the C205 leads on the HP LaserJet 4 Plus/4M Plus/5/5M/...5N) on the DC Controller. Table 7-10 50 SERVICE Fuser Malfunction Checks Checks Is the ...
... the printer. Is the Thermistor defective? 2. Use an ohmmeter and measure the continuity between pins (see Figure 7-6, callout 1). Note The 50 SERVICE error message can be cleared immediately by shorting the C202 leads on the HP LaserJet 4/4M (or the C205 leads on the HP LaserJet 4 Plus/4M Plus/5/5M/...5N) on the DC Controller. Table 7-10 50 SERVICE Fuser Malfunction Checks Checks Is the ...
Service Manual
Page 437
Index ! 12 PRINTER OPEN 7-18 13 PAPER JAM 7-20 14 NO EP CART 7-25 16 TONER LOW 4-10, 7-25 21 PRINT OVERRUN 3-53 41.1 ERROR 7-28 41.2 ERROR 7-28, 7-31 41.3 ERROR 7-28 41.4 ERROR 7-28 41.5 ERROR 7-28 50 service error 7-29 51 ERROR Message 7-31 52 ERROR 7-32 57 SERVICE 7-33...cleaning brush uses 4-16 cleaning station, drum 5-18 clearable warnings 7-10 CLEARING MEMORY 7-A CLOSE PRINTER COVER 7-A cold reset 3-23, B-27 communications checks 7-52, 7-54 component locations 7-59 CompuServe Forum, HP 1-13 conditioning station, drum 5-19 configuration AUTOEXEC.BAT 7-53 communications check 7-52 system 3-31...
Index ! 12 PRINTER OPEN 7-18 13 PAPER JAM 7-20 14 NO EP CART 7-25 16 TONER LOW 4-10, 7-25 21 PRINT OVERRUN 3-53 41.1 ERROR 7-28 41.2 ERROR 7-28, 7-31 41.3 ERROR 7-28 41.4 ERROR 7-28 41.5 ERROR 7-28 50 service error 7-29 51 ERROR Message 7-31 52 ERROR 7-32 57 SERVICE 7-33...cleaning brush uses 4-16 cleaning station, drum 5-18 clearable warnings 7-10 CLEARING MEMORY 7-A CLOSE PRINTER COVER 7-A cold reset 3-23, B-27 communications checks 7-52, 7-54 component locations 7-59 CompuServe Forum, HP 1-13 conditioning station, drum 5-19 configuration AUTOEXEC.BAT 7-53 communications check 7-52 system 3-31...
Service Manual
Page 438
... 3-42 Drum cleaning station 5-18 conditioning station 5-19 developing station 5-22 photosensitive 5-17 Rotation Check 7-50 sensitivity 5-17 transferring station 5-24 writing station 5-20 dtr polarity 3-34 dtr/dsr 3-34 Duplex components...Error messages MP/PC/LC LOAD 7-13 troubleshooting 7-2 ESD 6-1 European Customer Support Center (ECSC) 1-14 European formatter installation 3-22 exhaust fan motor 5-10 Explorer 3-33 F FACTORY DEFAULTS 7-A faint print 7-35 faint print 7-38 Index-2 fan checks 7-34 failure 7-34 motor signals 5-10 removal 6-39 faulty registration 7-39 fax information service (HP...
... 3-42 Drum cleaning station 5-18 conditioning station 5-19 developing station 5-22 photosensitive 5-17 Rotation Check 7-50 sensitivity 5-17 transferring station 5-24 writing station 5-20 dtr polarity 3-34 dtr/dsr 3-34 Duplex components...Error messages MP/PC/LC LOAD 7-13 troubleshooting 7-2 ESD 6-1 European Customer Support Center (ECSC) 1-14 European formatter installation 3-22 exhaust fan motor 5-10 Explorer 3-33 F FACTORY DEFAULTS 7-A faint print 7-35 faint print 7-38 Index-2 fan checks 7-34 failure 7-34 motor signals 5-10 removal 6-39 faulty registration 7-39 fax information service (HP...
Service Manual
Page 443
service checkpoints 4-1, 4-3 Service Mode 3-20, B-25 service/error messages 3-59 setting the cold reset B-27 setting the page count 3-21, B-26 setting up the envelope feeder 3-50 settings, tray switch 5-9 sheet feeder installation 3-44 signals fan motor 5-10 main motor 5-... data out) 5-4 smeared print/improper fusing 7-35, 7-42 software B-35 shipped with printer B-34 solenoids 5-5 signals 5-5 space requirements 2-2 specifications IrDA B-34 labels 2-3, 2-5 paper 2-3 print media 2-3 standard printer operation 5-33 standby period 5-37 state machines 5-4 statement, RFI 1-9 station drum cleaning ...
service checkpoints 4-1, 4-3 Service Mode 3-20, B-25 service/error messages 3-59 setting the cold reset B-27 setting the page count 3-21, B-26 setting up the envelope feeder 3-50 settings, tray switch 5-9 sheet feeder installation 3-44 signals fan motor 5-10 main motor 5-... data out) 5-4 smeared print/improper fusing 7-35, 7-42 software B-35 shipped with printer B-34 solenoids 5-5 signals 5-5 space requirements 2-2 specifications IrDA B-34 labels 2-3, 2-5 paper 2-3 print media 2-3 standard printer operation 5-33 standby period 5-37 state machines 5-4 statement, RFI 1-9 station drum cleaning ...