HP Laserjet 5 Service Manual

							Printing an Engine Test
The engine test print can be used to verify that the print engine is functioning
correctly. The Formatter PCA is completely bypassed during an engine test.
Consequently, this test is useful for isolating engine printer problems. The engine
test prints a full page of vertical lines down the entire printable area. This page is
useful for checking and adjusting registration.
NotePerform the engine test with the printer covers in place, as shown in Figure 3-6.
Refer to “Engine Test” in Chapter 7 for the engine test procedure.
Engine Test Button
Figure 3-3
3-10 Operating Overview 
						

							Resetting the Printer
Resetting the printer accomplishes the following:
·Clears all data from the printer’s memory (including unprinted data, downloaded
fonts, and macros).
·Stops any printing that is taking place and ejects the page.
·Removes some error conditions.
·Resets the printer to its factory default settings.
To Reset the Printer
Press and hold the Front Panel Button until the three control panel lights blink
quickly in succession (about 5 seconds), then let go of the button. After resetting,
the Ready (bottom) Light will remain lit if there are no printer errors. (Make sure
there is paper in the printer or the error light will remain on.)
3
Installation and
Configuration
Operating Overview 3-11 
						

							3-12 Operating Overview 
						

							4
Printer Maintenance
Contents
Life Expectancy of Consumables . .  . .  . .  . .  . .  . .  . .  . .  . .  . .  . .  . . 4-3
Toner Cartridge Life . .  . .  . .  . .  . .  . .  . .  . .  . .  . .  . .  . .  . .  . .  . . 4-4
Saving Toner with EconoMode .  . .  . .  . .  . .  . .  . .  . .  . .  . .  . .  . . 4-4
Refilled Toner Cartridges . .  . .  . .  . .  . .  . .  . .  . .  . .  . .  . .  . .  . . 4-5
Recycling Toner Cartridges .  . .  . .  . .  . .  . .  . .  . .  . .  . .  . .  . .  . . 4-5
Cleaning the Printer .  . .  . .  . .  . .  . .  . .  . .  . .  . .  . .  . .  . .  . .  . .  . . 4-6
Cleaning Printer Components . .  . .  . .  . .  . .  . .  . .  . .  . .  . .  . .  . . 4-7
Cleaning Spilled Toner . .  . .  . .  . .  . .  . .  . .  . .  . .  . .  . .  . .  . .  . . 4-8
Printer Maintenance 4-1 
						

							4-2 Printer Maintenance 
						

							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 HP LaserJet 5L
Part NumberHP LaserJet 6L
Part NumberEst Life
(pgs)Remarks
Toner Cartridge
(user replaceable)C3906A C3906A 2,500* When print becomes
faint, shake cartridge to
distribute remaining
toner.
Transfer Roller RF5-1534-000CN RF5-1534-000CN 50,000 May affect print quality
and/or paper movement.
Paper Pickup
AssemblyRG5-1940-000CN RG5-3486-000CN 50,000 Look for glazing and/or
cracks.
Separation Pad &
Sub padsRY7-5008-000CN RY7-5008-000CN 50,000 May affect paper
movement.
Heating Element
100-120 V, 50/60 Hz
220-240 V, 50 Hz
Pressure RollerRG5-1964-000CN
RG5-1965-000CN
RF5-1516-000CNRG5-3459-000CN
RG5-3463-000CN
RF5-2362-000CN50,000 May affect print quality
and/or paper movement.
Look for marks on
pressure roller or upper
Teflon sleeve.
*The estimated toner cartridge life is based on Letter or A4 size paper with an average of 5% toner
coverage and a medium density setting. Toner cartridge life can be extended further by conserving
toner using the printer’s EconoMode feature.
Table 4-1Life Expectancy of Consumables
4
Maintenance
Printer Maintenance 4-3 
						

							Toner Cartridge Life
The toner cartridge has been designed to simplify the replacement of the printer’s
major “consumable” parts. The toner cartridge contains the printing mechanism and
a supply of toner. When using a typical word-processing application, a toner
cartridge will print approximately 2500 pages where the text covers about 5% of the
page.
Five Percent Text Coverage
When regularly printing pages with less coverage, such as short memos, a toner
cartridge should print over 2500 pages. However, if routinely printing very dense
print, the cartridge will not print a full 2500 pages.
NoteFor best results, always use a toner cartridge before the expiration date stamped on
the toner cartridge box.
Saving Toner with EconoMode
Toner cartridge life can be extended dramatically by using the EconoMode printing
feature of the printer. EconoMode uses approximately 50% less toner than normal
printing. The printed page is much lighter and is adequate for printing drafts or
Figure 4-1
4-4 Printer Maintenance 
						

							proofs. EconoMode can be set through your printer driver. See Chapter 3 for
information.
NotesSome software applications may refer to this as “draft mode.
Refilled Toner Cartridges
While Hewlett-Packard does not prohibit the use of refilled toner cartridges during
the warranty period or while under a maintenance contract, we do not recommend
their use. The reasons for this are:
·Hewlett-Packard has no control or process to ensure that a refilled toner cartridge
functions at the high level of reliability of a new HP LaserJet toner cartridge.
·Hewlett-Packard also cannot predict what the long-term reliability effect on the
printer is from using different toner formulations found in refilled cartridges.
·Hewlett-Packard has no control over the actual print quality of a refilled toner
cartridge. The print quality of HP LaserJet toner cartridges influences the
customer’s perception of the printer.
Repairs resulting from the use of refilled toner cartridges are not covered under the
HP warranty or maintenance contract.
Recycling Toner Cartridges
In order to reduce waste, Hewlett-Packard has adopted a recycling program for used
toner cartridges. Plastics and other material are recycled. Cartridge components that
do not wear out are reused. HP pays the shipping costs from the user to the
recycling plant. For each cartridge returned, HP donates one U.S. dollar to be
shared by the Nature Conservancy and the National Wildlife Federation. To join this
recycling effort, follow the instructions inside the toner cartridge box.
4
Maintenance
Printer Maintenance 4-5 
						

							Cleaning the Printer
To maintain the print quality, thoroughly clean the printer:
·Every time you change the toner cartridge.
·After printing approximately 2,500 pages.
·Whenever print quality problems occur.
Clean the outside of the printer with a lightly water-dampened cloth. Clean the
inside with only a dry, lint-free cloth. Observe the warnings and cautions below.
WARNING!Before you begin these steps, unplug the printer to avoid shock hazard.
When cleaning around the front door area, avoid touching the heating element. It
may be HOT. (For heating element location, see Figure 6-14.)
4-6 Printer Maintenance 
						

							Cleaning Printer Components
CAUTIONTo avoid permanent damage to the toner cartridge, do not use ammonia-based
cleaners on or around the printer. Do not touch the transfer roller with your fingers.
Contaminants on the roller can cause print quality problems.
COMPONENT CLEANING METHOD/NOTES
Outside Covers Use a water-dampened cloth. Do not use solvents or
ammonia-based cleaners.
Inside General Use a dry, lint free cloth. Remove all dust, spilled toner, and
paper particles.
Exit Roller Use a water-dampened lint-free cloth. (For location, see
Figure 6-8.)
Fuser Exit Roller Use a water-dampened lint-free cloth. (For location, see
Figure 6-18.)
Pickup Roller Use a lint-free cloth dampened with isopropyl alcohol. (For
location, see Figure 6-25.)
Pressure Roller Use a dry lint-free cloth. (For location, see Figure 6-16.)
Transfer Roller Use a dry, lint-free cloth. DO NOT TOUCH with your fingers.
(For location, see Figure 6-30.)
Separation Pad Use a dry lint-free cloth. (For location, see Figure 6-31.)
Delivery Assembly Use a water-dampened lint-free cloth. (For location, see
Figure 6-10.)
Static Eliminator Teeth Use compressed air. (See Figure 4-2 on the following page
for static eliminator teeth location.)
Table 4-2Cleaning Printer Components
4
Maintenance
Printer Maintenance 4-7