PREFACE This service manual contains basic information required for after-sales service of the optional lower tray unit for color laser printer (here-in-after referred to as "the unit"). This information is vital to the service technician to maintain the high quality and performance of the printer and unit. This service manual covers the LT-24CL lower tray unit. Information in this manual is subject to change due to improvement or re-design of the product. All relevant information in such cases will be supplied in service information bulletins (Technical Information). A thorough understanding of this unit, based on information in this service manual and service information bulletins, is required for maintaining its quality performance and for improving the practical ability to find the cause of problems.
3.2 UNPACKING .........................................................................................................4 3.3 INSTALLATION PROCEDURES................................................................................. 5 3.3.1 Install the lower tray unit to the printer .............................................................................5 3.3.2 Connect the LT signal connector into the printer .............................................................8 3.3.3 Install the covers ..............................................................................................................9 3.3.4 Relocate the printer / Test print........................................................................................9
5. DISASSEMBLY PROCEDURE................................ ......................... 11 5.1 PAPER SENSOR / OHP SENSOR .........................................................................12 5.2 PAPER SIZE SENSOR ......................................................................................... 12 5.3 PAPER FEEDING CLUTCH ................................................................................... 12 5.4 PAPER FEEDING ROLLER / SEPARATION PAD ....................................................... 13
6. CLEARING PAPER JAMS ................................ ............................... 14 6.1 PAPER FEEDING JAM ......................................................................................... 14 6.2 INNER JAM / OUTER JAM .................................................................................... 14
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REGULATIONS
REGULATIONS LASER SAFETY (FOR 110-120 V MODEL ONLY) The printer, HL-2400C is certified as a Class I laser product under the U.S. Department of Health and Human Services (DHHS) Radiation Performance Standard according to the Radiation Control for Health and Safety Act of 1968. This means that the printer does not produce hazardous laser radiation. Since radiation emitted inside the printer is completely confined within protective housings and external covers, the laser beam cannot escape from the machine during any phase of user operation.
FDA REGULATIONS (FOR 110-120 V MODEL ONLY) U.S. Food and Drug Administration (FDA) has implemented regulations for laser products manufactured on and after August 2, 1976. Compliance is mandatory for products marketed in the United States. One of the following labels on the back of the printer indicates compliance with the FDA regulations and must be attached to laser products marketed in the United States. Caution Use of controls, adjustments or performance of procedures other than those specified in this manual may result in hazardous radiation exposure.
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REGULATIONS
IEC 825 SPECIFICATION (FOR 220-240 V MODEL ONLY) The printer, HL-2400C is a Class 1 laser product as defined in IEC 825 specifications. The label shown below is attached in countries where required.
CLASS 1LASER PRODUCT APPAREIL Å LASER DE CLASSE 1 LASER KLASSE 1 PRODUKT
This printer has a Class 3B Laser Diode which emits invisible laser radiation in the Scanner Unit. The Scanner Unit should not be opened under any circumstances. Caution Use of controls, adjustments or performance of procedures other than those specified in this manual may result in hazardous radiation exposure. The following caution label is attached near the scanner unit.
5mW 780nm-800nm DANGERINVISIBLE LASER RADIATION WHEN OPEN. AVOID DIRECT EXPOSURE TO BEAM. LASERSTRAHLUNG, WENN ABDECKUNG GEÖFFNET UND SICHERHEITSVERRIEGELUNG ÜBERBRÜCKT. NICHT DEM STRAHL AUSSETZEN. RAYON LASER INVISIBLE LORS DE L'OUVER TURE. EVITER L'EXPOSITION DIRECTE. RADIACION LASER INVISIBLE AL ABRIR. EVITAR LA EXPOSICION DIRECTA AL HAZ.
VORSICHT- UNSICHTBARE DANGERPELIGRO-
MAS
For Finland and Sweden LUOKAN 1 LASERLAITE KLASS 1 LASER APPARAT Varoitus! Laitteen käyttäminen muulla kuin tässä käyttöohjeessa mainitulla tavalla saattaa altistaa käyttäjän turvallisuusluokan 1 ylittävälle näkymättömälle lasersäteilylle. Varning Om apparaten används på annat sätt än i denna Bruksanvisning specificerats, kan användaren utsättas för osynlig laserstrålning, som överskrider gränsen för laserklass 1.
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SAFETY INSTRUCTIONS
SAFETY INSTRUCTIONS SAFETY PRINCIPLE 1) Before starting any operations, read this manual thoroughly. Especially read the safety instructions in this section carefully and ensure that you understand the contents. 2) Perform all the operations by following the procedures described in this manual. Follow all the cautions and warnings set out in the procedures and on safety labels affixed to the machine. Failure to do so may result in human injury or equipment damage. 3) Perform only the procedures explained in this manual. Refrain from opening or touching any portions that are not related to your required operation(s). 4) Repair and replacement of parts should be performed by trained and qualified persons only. Operators should not attempt to do such repair or replacement work. 5) It must be appreciated that the above-mentioned cautions and warnings do not cover everything because it is impossible to evaluate all the circumstances of repair situations.
SPECIAL SAFETY INFORMATION Introductory Information Cautions and warnings are made clear by following the `Safety Alert Symbols' or `Signal Words' such as DANGER, WARNING and CAUTION. This is the safety alert. When you find this symbol placed on the equipment or marked in this manual, be aware of the potential of human injuries. Follow the recommended precautions and safety operation practices. DANGER is used to indicate the presence of a hazard which will cause severe human injuries or a fatal accident if the warning is ignored. WARNING is used to indicate the presence of a hazard or unsafe practices which may cause severe human injuries or a fatal accident if the warning is ignored. CAUTION is used to indicate the presence of a hazard or unsafe practices which may cause minor human injuries if the warning is ignored. CAUTION also calls your attention to safety messages in this manual. Carefully read all the safety messages set out in this manual and also in the safety warning signs placed on the equipment. In this manual, the safety instructions (safety alert symbols and signal words) are enclosed in a rectangular enclosure to bring them to your attention. Keep the safety signs on the equipment in good condition and ensure none are missing or damaged. Replace the safety signs if unreadable or damaged. Learn how to operate the equipment and how to use the controls properly. Do not let anyone operate this equipment without following the instructions. Keep the equipment in proper working condition. Unauthorized modification to the equipment may impair the function & safety and affect the life of the equipment. Listed below are the various kinds of "WARNING" messages contained in this manual.
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SAFETY INSTRUCTIONS
WARNING HAZARDOUS VOLTAGE May cause serious injuries or fatal accidents. Voltage is now being supplied from the power supply of printer. There is a danger of electrical shock if you touch the active area inside the printer. Be sure to turn the power supply switch OFF and pull the plug out from the power outlet before starting maintenance work on the printer.
WARNING HARMFUL OZONE GAS Inhalation of an excessive amount of ozone gas may adversely affect the respiratory organs. An Ozone Filter is fitted to this printer to reduce the exhausted ozone. This filter must be replaced with a new filter periodically in accordance with the manual supplied with the printer.
WARNING HOT SURFACE The Fusing Unit reaches a temperature of approx.160°C and adjacent parts are also very hot. When you need to change the cleaning pad or remove jammed paper, wait about 20 minutes after opening the paper exit unit to allow the unit to cool down.
CAUTION ROTATING PARTS Be aware of the potential danger of various rollers and take care not to get your fingers or hand caught into the machine, this can cause serious injuries. Note that the exit roller that ejects the printed paper is rotating while printing. Be careful not to get your hair, fingers, hands, sleeve or necktie caught in the machine while operating the machine.
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SAFETY INSTRUCTIONS
CAUTION HAZARDOUS POWDER Toner is a fine powder which can cause a powder explosion if disposed of into a fire. Under no circumstances dispose of toner into a fire.
CAUTION HAZARDOUS POWDER Toner is a fine powder which may cause irritation to the eyes and respiratory organs if inhaled. Handle the toner cartridge, waste toner pack and developing unit carefully so as not to spill the toner.
CAUTION POWER CORDS & PLUGS This printer is equipped with a 3-wire power cord fitted with a 3-pronged plug with an earth connection for the user's safety. Use these power cords in conjunction with a properly grounded electrical outlet to avoid the possibility of an electrical shock.
CAUTION SAFETY INTERLOCK The front cover, paper exit unit and transfer unit of this printer have electrical safety interlocks to turn the power off whenever they are opened. Do not attempt to circumvent these safety interlocks.