HP Laserjet 4 Manual
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Accessing the SIMM Slots Please refer to Chapter 6, Removal and Replacement, for instructions on removing the SIMMS door to access the slots. Note that access to the SIMM slots are slightly different for the various printer models. Installing the SIMM Boards 1Through the open door, you can see the four SIMM board slots (see previous Figure 3-23). For easiest installation, fill the slots from right to left, starting with slot 1 (see the diagram on the SIMM slots door). 2Remove the SIMM board from the antistatic package. Hold the board with your forefingers on the side edges and your thumbs against the back edge. Turn the board so the notch on one end is on the bottom and the metal teeth face the slot (see Figure 3-24. Figure 3-24 Positioning the SIMM board with the notch at the bottom. Configuration 3-55
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3Hold the SIMM board at a 30-degree angle to the slot and push the edge of the board evenly and firmly into the slot (see Figure 3-25 callout (A) ). 4Rotate the SIMM board to the right until the board “clicks” into the metal locking tabs, securing the board into place (see Figure 3-25 callout (B)). 5Gently rock the SIMM board back and forth. If it is seated correctly, it will not lift away from the slot. If it lifts up, you have not pushed it firmly enough into the slot. Try again. 6Replace the SIMM door and screws. 7Replace the right side cover. 8Close the top front cover and gently press down on each end until the cover is completely seated. Figure 3-25 Installing the SIMM Board 3-56 Configuration
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Testing a SIMM Board Use the procedures below to print a self-test page to verify SIMM board installation. Procedures are given for both memory and PostScript SIMMs. Memory SIMM NoteFor the LaserJet 5/5M/5N, the On Line key has been replaced by the Go key. The Enter key has been replaced by the Select key. Running a Self Test Printout 1Plug in the power cord and turn ON the printer. 2After a few seconds, 00 READY should appear in the control panel display. If an error message appears, refer to “Troubleshooting a SIMM Board” later in this chapter. 3Press [On Line] to take the printer off line. 4Press [Menu] until TEST MENU appears in the control panel display. 5Press [Item] until SELF TEST appears in the control panel display. 6Press [Enter] to print a self test. 7Press [On Line] after the self test printed. Locate “RAM SIZE” on the self-test printout. This is the amount of printer memory now installed in the printer. Configuration 3-57
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Personality SIMM (PostScript) A personality (printer language) SIMM installation can be verified as outlined below (a PostScript SIMM is used in this example). NoteFor the LaserJet 5/5M/5N, the On Line key has been replaced by the Go key. The Enter key has been replaced by the Select key. 1Plug in the power cord and turn ON the printer. 2After a few seconds, the on line indicator should light and 00 READY should appear in the control panel display. If an error message appears, refer to “Troubleshooting a SIMM Board” following. 3Press [On Line to take the printer off line. 4Press [Menu] until JOB MENU appears in the control panel display. 5Press [Item] until PERSONALITY=AUTO*, the default, appears in the control panel display. 6Press [+] until PERSONALITY=PS appears in the display. This indicates that your printer recognizes that PostScript is installed. If PERSONALITY=PS does not appear, check the SIMM installation. 7Press [On Line] to return the printer on line. 3-58 Configuration
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Troubleshooting a SIMM Board For more information about the service/error messages below, see Chapter 7, Troubleshooting. Service / Error Messages One of two messages can be generated when your printer is checking its SIMM internal memory. 61.X SERVICE where X = 1, 2, 3, or 4 This error indicates a SIMM parity error. The x indicates which SIMM slot generated the error. If these messages appear first, check the HP part number to make sure you have the right SIMM board. 62.X ERROR where X = 0, 1, 2, 3, 4, or 5 This error indicates your printer identified a problem while checking memory. If x=0, the problem is in internal Read Only Memory (ROM) on the Formatter. If x = 1, 2, 3, or 4, the problem is in SIMM slot 1, 2, 3, or 4. If x = 5, the problem is in an external cartridge installed in the printer. Refer to chapter 7 for more information. Configuration 3-59
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4 Preventive Maintenance Introduction The printer requires minimum routine maintenance. Use this chapter for information on: •Service Checkpoints. These are the items that must be cleaned and checked when the Toner Cartridge is replaced, or before performing periodic maintenance. •Toner Cartridge information, such as: •Storing and installing the Toner Cartridge •Refilled Toner Cartridges •16 TONER LOW message •Required periodic maintenance on: •Transfer roller •Separation pads •Paper pickup rollers Preventive Maintenance 4-1
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Life Expectancy of Consumables Always inspect the components listed in Table 4-1 for wear when servicing the printer. Replace these components as needed, based on printer failures or wear, not strictly on usage. DESCRIPTION QTY EST. LIFE (pages)REMARKS 1. Toner Cartridge 1 6800 1When print becomes faint, shake cartridge to distribute remaining toner. 2. MP (Tray 1) Pickup Roller Assembly1 200,000Replace roller and separation pad together. 3. PC (Tray 2) Pickup Roller 1 200,000Look for glazing and cracks. 4. Separation Pad 1 200,000Look for glazing and grooves. Replace together with Pickup Rollers. 5. Transfer Charging Roller 1 200,000May affect print quality and/or paper jams. 6. Fuser Assembly (115 V, 50/60 Hz) Fuser Assembly (220 V, 50 Hz)1 1200,000 200,000May affect print quality and/or paper jams. Look for marks on rollers. 7. LC (Tray 3) Pickup Roller 1 200,000Look for glazing and grooves. Replace the Separation Pad. 8. Exhaust Fan 1 25,000 hrs. Notes: The estimated Toner Cartridge life is based on A4 or letter size prints with an average of 5% toner coverage, and with the density setting at 3. NoteFor part numbers of the components listed in Table 4-1, see Chapter 8. Table 4-1Selected Service Consumables 4-2 Preventive Maintenance
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Service Checkpoints This is a fold-out page 3 panels wide. Figure 4-1 Maintenance Checkpoints Preventive Maintenance 4-3
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Cleaning Your Printer When it is time to replace the toner cartridge, perform the cleaning procedures outlined in Figure 4-1. 4-4 Preventive Maintenance