Our troubleshooting assistant can help you avoid a trip to the service center. Changing your touchpad settings. Connecting to a Wi-Fi network using Windows All rights reserved. Login Partner Resources. Popular Links Help finding a driver. Recently Viewed. Where's my model or serial number? For computers click here..
For tablets click here For televisions click here. What's my Operating System? Drives the fuser unit by transmitting the rotation of the fuser motor through gears to the fuser rollers and exit rollers. Reference frequency LGC Drum motor. The control system of the drum motors is summarized as follows: 1 LGC provides control signals for making drum motors Y, M, C and K rotate and for setting their rotation direction.
The steps 2 to 4 being repeated, the motor continues to rotate. When the signal comes to the level "L", the motor is turned ON. LGC Motor. The control system of transfer belt motor is summarized as follows: 1 LGC provides control signals for making the transfer belt motor rotate and for setting its rotation direction.
In addition, deflection in the power source is added to this signal generation. The transfer belt motor is caused to rotate at a fixed speed locked range. The drive circuit is shown below. The motor is caused to rotate. The current which was flowing through the motor winding is forced to flow through the diodes D1, D2 and D3. The motor finally comes to a stop. The control and driving system of developer motor is summarized as follows: 1 LGC provides a signal to control the rotation of the developer motor: CDMON color developer motor , KDMON black developer motor : Motor rotation command 2 The excitation phase switching section works to excite each phase of the developer motor.
The developer motor starts rotating. Deflection in the power supply voltage is also added to the resultant signal signal generation.
The reference frequency of the color developer motor is supplied from LGC, while that of the black developer motor is generated inside the motor. The frequency of the reference clock is When the period of the FG pulse is within 6. LED LP1 also lights. When this signal comes to the level "L", the motor is turned ON.
The control and driving system of fuser motor is summarized as follows: 1 LGC provides a signal to control the rotation of the fuser motor: FSMOON : Motor rotation command 2 The excitation phase switching section works to excite each phase of the fuser motor. The fuser motor starts rotating.
The frequency of the reference clock is Hz. It is Hz during the OHP mode. When this signal comes to the level L, the fuser motor rotates at a low speed. When this signal comes to the level "L", the fuser motor is turned ON. Note: Be careful when handling the drum drive unit since it is fairly heavy.
Avoid damaging the drum coupling. B-2 Black developer motor 1 Disconnect 2 connectors of the black developer motor and remove the black developer motor 2 screws. B-3 Developer drive gear 1 Remove the drum drive unit. Note: When installing the developer drive unit into the machine, fasten the screws in order from to as shown in the right, while pressing the unit precisely against the rear frame. Within the group of or , the order can be ignored.
C-2 Fuser motor 1 Disconnect the connector of the fuser motor and remove the fuser motor 2 screws. Note: The belt will remain in the assembly. The paper feeding system is mainly comprised of the pick-up roller, paper feed roller, separation roller, registration rollers, bypass paper sensor, cassette paper-empty sensor, paper size switch, cassette-feed jam sensor, registration sensor, and their drive mechanism.
For this purpose, they are raised up and down. If two sheets or more are sent from the pick-up roller, the frictional force between the sheets is smaller than the separating force of the separation roller. Thus, the sheet in contact with the separation roller cannot advance any further.
When only one sheet is sent from the pick-up roller, the separation roller is forced to follow the paper feed roller. To prevent paper dust from adhering to the registration rollers, a brush is provided in contact with the lower registration roller. If paper is set there, bypass feeding is selected in preference to cassette feeding. If there is no paper in the cassette, the actuator works to block the optical path of the sensor, allowing it to determine that there is no paper.
Each cassette has zero to four projections of its own pattern, each of which presses the corresponding size switch es when the cassette is set in the copier. The paper size and type of the cassette is determined by the combination of the switches pushed. It is also used for detecting jams such as paper misfeeding. It also detects the passage of the trailing edge of the paper.
When the leading edge has been detected, it is determined that the aligning of the paper by the registration rollers has been finished. A modulating reflector photo interrupter, resistant to external light interference, is equipped in this machine to discriminate OHP films from normal paper when films are fed.
The OHP film detection circuits are as shown above. The sensor output is pulled up by the LGC board and its Vout varies according to the type of paper fed, as shown in the table on the right. Name Bypass separation pad Bypass feed roller Bypass pick-up roller Cassette separation roller Cassette feed roller Cassette pick-up roller Transport roller 1 Bypass paper sensor. When a driving force is applied to the paper feed roller shaft, the rotational force is transmitted via the spring clutch to the pick-up lever, allowing the pick-up arm to fall by its own weight.
The pick-up lever is stopped when the spring clutch comes to the stopper. When the driving force is removed from the paper feed roller shaft, the lever spring forces up the pick-up lever, and thus the pick-up arm is also lifted up. When the cassette is inserted, the lever a is moved up in the direction of A by the lever d attached to the cassette. This causes the link mechanism comprised of levers b and c to allow the pick-up roller to move down by its own weight.
As shown on the right, the separation roller mechanism is mainly comprised of a paper feed roller, separation roller, and spring joint. The paper feed roller is so arranged that it rotates in the direction of via a feed clutch at the Spring joint Paper feed roller. The diagram on the bottom right shows how the double feeding is prevented: Since the friction between two sheets is small, the lower sheet is not transported any further by the separation roller, and only the upper sheet is moved by the paper feed roller in the direction of Example: When a single sheet 1 enters between the rollers: Since the transporting force of the paper feed roller is greater than the braking force of the separation roller, the separation roller is forced to follow the paper feed roller, making the sheet go forward to the registration rollers.
When two sheets 1 and 2 enter between the rollers simultaneously: Since the transporting force of the paper feed roller and the braking force of the separation roller are greater than the frictional force between two sheets, the upper sheet 1 is transported by the paper feed roller in the direction of.
The lower sheet 2 is braked by the separation roller and is not carried any further. Paper feed roller. When the cassette tray-up limit sensor is turned ON LH , the cassette tray-up motor is de-energized, causing the cassette tray to stop.
At this time, if the cassette paper-empty sensor is turned ON H , it is determined that there is paper in the cassette. Otherwise, it is determined that there is no paper. Whether or not there is paper in the cassette, the tray moves up and stops at the upper position.
Only after the cassette is reinserted, the cassette tray moves up to check whether there is paper in the cassette. During this state, the tray remains in the upper position. The bypass-feed clutch is turned ON, causing the bypass pick-up and paper feed rollers to rotate. The bypass pick-up roller moves down to start feeding paper. The leading edge of the paper turns ON the registration sensor, causing the paper to be aligned by the registration roller.
The bypass feed clutch is turned OFF, causing the bypass pick-up and bypass feed rollers to stop rotating. The bypass pick-up roller moves up. When the leading edge of the paper turns ON the cassette-feed jam sensor, the cassette feed clutch is turned OFF. The leading edge of the paper turns ON the registration sensor, and the paper is aligned by the registration rollers. The feed path clutch is turned OFF, causing the transport roller to stop.
The following shows the block diagram of TAK. IN1 and IN2 are input terminals to receive signals from the microcomputer. Difference Phase comparison Speed comparison Difference Rotation control Rotor position detector Voltage detection circuit. With the steps 2 to 4 repeated, the motor continues to rotate. When this signal comes to the level L, the motor is turned ON. A-3 Bypass pick-up roller 1 Remove the clip.
Note: Pay attention to the following points when reassembling the bypass pick-up roller and the bypass feed roller: 1. Set the timing belt securely on the pulleys and the belt tensioner. Set the timing belt on the correct position especially for the bypass pick-up roller. Fit the clips securely into the groove of the shaft. Confirm that there is no stain of oil etc. When installing the bypass pick-up roller and the bypass feed roller, pay attention to their correct direction.
In case the spring clutch is removed, screw the arbor properly to the groove edge of the shaft to reinstall. A-4 Separation pad 1 Remove the lower bracket separation pad bracket 2 screws. Note: Be careful not to lose the small roller. B-2 Upper and lower registration rollers 1 Unscrew 2 screws, and remove the pre-registration guide.
Registration pressure spring. B-3 Paper-dust brush 1 Unscrew the screw, and pull out the brush toward the front. The paper-dust brush can be removed with the registration unit installed. Paper-dust brush. Connector Harness clamp. Remove the feed-side rear cover. Disconnect 2 connectors and remove the groundwire 1 screw. Remove the hinge stop bracket 1 screw. Disconnect the connector see the step 4 above. Remove the side door together with LCF. Hinge stop bracket.
Note: When reassembling the rollers for pick-up, paper feed and separation, pay attention to the following points: 1. Fit the pin into the pulley. Set the timing belt securely on the pulleys. Be careful as the lock direction of each oneway clutch is different. LO CK. Fit the clips securely into the groove on the shaft. Pay attention to the mounting direction of the rollers. Separation roller Paper Pick-up roller Paper feed roller.
C-2 Paper-size switch 1 Unscrew 2 screws and remove the paper-size switch. Paper-size switch. C-3 Cassette feed transport unit 1 Remove the cassette feed unit. C-4 Cassette feed jam sensor 1 Unscrew 2 screws and remove the sensor unit. D-2 Electromagnetic clutches Feed path, bypass feed and registration clutches 1 Unscrew 4 screws and remove the paper feed drive unit. Bushing Clip large. Note: When reassembling the electromagnetic clutches, pay attention to the color of each connector harness not to connect it wrong Refer to Page Paper exit unit Clip Connector Edge saddle.
Clip Bushing Gear Bushing. Clip, Bushing Paper exit roller. Positioning pin of paper exit unit 3 4 4. The processing unit is comprised as shown below. Developer unit Y does not have any cleaner equipped. Photoconductivity is a characteristic which certain substances possess. When such substance is illuminated with light, the lighted area acts as an electric conductor and shows decrease of the electrical resistance; while the other area which is not illuminated unexposed area behaves as an insulator.
Substances possessing such a characteristic as this are called photoconductors. When high voltage is applied to the charger wire, the air around it is charged or ionized , and the ionized air flows to the drum to make it charged. This phenomenon is called corona discharge. A uniform minus negative charge is applied to the surface of the drum by corona discharge from the main charger.
The discharge LED array performs two purposes: Cleaning effect by lighting the drum surface to reduce its electric resistance and neutralize or erase the residual charge on the drum surface, and pre-exposure effect by maintaining the surface potential of the drum surface at a uniform level prior to subsequent exposure. The carrier consists of approx. The toner is made of approx. The ratio of toner by weight in the developer material is about 5.
Since the developer material degrades in quality after long time use, it needs to be replaced periodically. This will cause the toner to adhere to the carrier by electrostatic force. These magnets attract developer material over its surface to form a magnetic brush for development. The magnets are fixed in place and the sleeve rotates around them.
This rotation causes the magnetic brush on the sleeve to sweep the drum surface gently like a broom and accomplish development. The auto toner sensor is set to detect the toner content in the developer material by means of a magnetic bridge circuit, and supply toner from a toner cartridge if the toner ratio decreases to a certain level. So, a thermistor is employed to detect the temperature of the drum surface so that the amount of charge placed on the drum surface can be controlled and maintained at a consistent level.
Detects when the toner cartridge has run out of toner toner-empty detection. Toner density stabilization function During copying operation Maintains the toner density at a constant value in the following flow of events: The toner is consumed.
The toner density decreases. Change in the toner sensor output is detected. The toner motor is driven. Toner is supplied from the toner cartridge to the developer unit. Toner-empty detection and clearing function Detects the emptiness of toner in the toner cartridge: The toner motor is driven. The auto toner sensor output does not change.
The toner density does not change. It is determined that no toner is available toner empty. The toner-empty state is cleared: The toner motor is driven. Toner is supplied. The auto toner sensor output changes.
The toner density returns to the normal value. The toner-empty state is cleared. When the toner density becomes low The ratio of the toner to the carrier in the developer material decreases. The magnetic resistance decreases. The detected output increases. Auto-toner output VATS increases. When the toner density becomes high The ratio of the toner to the carrier in the developer material increases.
The magnetic resistance increases. The detected output decreases. Auto-toner output VATS decreases. Cleaner limit switch Control section : Detects when the wire cleaner reaches its limit position rear side.
Cleaner home position switch : Detects when the wire cleaner returns to its home position front. Note: "Signal name" shown in the following chart and tables is actually preceded with Y, M, C or K, according to its color. Detailed operation of the wire cleaning A sequence of operation to is performed: Initializing operation The drive unit is driven in a forward direction until the home position switch detects the wire cleaner. Cleaning operation forward After the detection of the home position, the drive unit is driven in a reverse direction until the limit switch detects the wire cleaner.
Cleaning operation return After the detection of the limit position, the drive unit is driven in a forward direction until the home position switch detects the wire cleaner. However, if the home position switch does not detect it for 20 seconds after the drive unit has started, the drive unit will be stopped and the message "Call for service" will be displayed.
So, a control method is provided whereby the drum surface temperature is detected to make the amount of charge on the drum surface consistent. As a drum temperature detection circuit, the circuit shown above is provided for each of Y yellow , M magenta , C cyan and K black drums. Here, the circuit for the Y drum is explained as an example.
The voltage developed across R38, thermistor and R37 is input via an analog multiplexer IC94 to the temperature signal terminal of the microcomputer. The old developer material is removed into the toner bag, and new developer material is filled into the developer unit from the developer cartridge. Then, place it on a flat table. Note: When removing the processing unit, make sure that the transfer belt unit is already lowered.
Since the processing unit is as heavy as about 10 kg, be careful when handling it. Disengage the latches one by one by pressing the cover. Note: Do not allow the harness to get caught in between when assembling.
Do not put the drum thermistor harness between the auxiliary metal plate and the frame. Do not put the harness of the discharge LED K in the cover screw cavities. Note: Be careful when you unscrew the wire cleaner drive unit, because the gears will come apart once the screws are removed. Take care to position the gears in the correct direction when assembling. Disengage the latches one by one in sequence starting with the one at the end first, by bending and lifting the latch.
Note: When removing the drum thermistor, hold its mold carefully with radio pliers and draw it out. Ensure that the harness does not get caught in between. Note: Take care that the shape of the main charger grid would not become deformed. After installing the main charger unit, check that the charger cleaner limit switch or the home position switch are not disconnected, and that the actuator is correctly connected. Terminal covers Grid.
Precautions for stringing the wire 1. Fit the wire in the V-shaped grooves at both front and rear. Do not allow the wire to twist or kink. Grip and pull out straight the wire cleaner with radio pliers. Note: When reassembling, the wire should be strung so that it runs on the side of the pad. The wire cleaner should be moved to and left at the front side. Wire cleaner. When removing the developer unit, be sure to close the developer removal shutter to prevent the developer material from spilling out.
When turning the shutter knob, pull it slightly while turning. When reinstall the developer unit, be sure to open the developer removal shutter to carry out "automatic removing of developer material" correctly. Shutter knob. The removed developer units must be installed back to the previous place respectively.
When installing the developer unit, ensure that the stain of the drum would not attach to the toner scattering prevention seal. Install the developer unit in the order below: Cleaner K developer unit K developer unit C developer unit M developer unit Y 4.
After installing it, be sure to rotate the drum to see that the cleaning blade would not peel off and cleaning can be performed properly. After checking the above, start installing next developer unit. Before installing a developer unit, first rotate its corresponding drum and remove stains from the drum surface.
While pressing the developer unit cover in the direction of the arrow, bend the latches to the outside and release them in the order of a, b, c to d. Press Developer unit cover a b c d. When installing the developer unit cover, first attach the latches on the side A, and then lock the others on the side B.
Note: Be careful not to deform the urethan seal or the sponge seal set along the toner scattering prevention seal holder when you install the holder back in place. Slide hooks Seal holder Doctor blade. Note: Attach the seals in the developer unit in the following procedure.
Place the front seal and the front Mylar sheet against the side sponge F and stick them there. Place the rear seal and the rear Mylar sheet against the side sponge R and stick them there. Plate pressure spring. Note: Before removing the pole-position adjuster, be sure to mark its position.
Bearing Pole-position adjuster. Note: Before installing the cleaner K, apply patting powder onto the surface of the drum K. Note: When the developer units M, C and K and the cleaner K are installed in the EPU frame, the cleaning blade pressure lever will become as shown below. Check that the blade is always pressurized by the tension spring.
Front side Rear side. Cleaning blade pressure lever Cleaning blade Tension spring frame side Cleaning blade pressure lever. The recovery blade is affixed with double-sided tape. Peel off the blade and the tape cleanly before affixing a new blade. When affixing a recovery blade, align its edge with the position shown in the illustration.
As any wave in the recovery blade can cause the recovered toner to drop, be sure to install the blade flatly. Felt Recovery blade Felt Base line for affixing recovery blade Cleaning blade Base line for affixing recovery blade Mylar sheet Mylar sheet.
The cleaner felt is affixed with doublesided tape. Peel off the cleaner felt and the tape cleanly before affixing a new felt. When affixing a cleaner felt, align its edge with the position shown in the illustration. Aligning position Aligning position Aligning position. Holding both sides of the drum, lift it out. When inserting or pulling out the drum shaft, do not do it forcefully so as to avoid the EPU frame being deformed.
When inserting the drum shaft back in place, wipe off any stain from its surface before reinserting it. After replacing the drum, apply patting powder onto the drum surface before installing the cleaner K or any developer unit to prevent the cleaning blade from peeling off. Their coupling pattern depends on the color of the toner cartridge to prevent wrong installation. Note: In such times as maintenance when the middle inner cover is removed, be sure to check the toner color before installing the cartridge.
In addition, when filling the developer unit with developer, this unit detects the presence of the developer cartridge by the developer cartridge detection switch and drives it. The following shows the circuit construction. The current that was flowing through the motor winding now flows through the diode D The motor finally stops.
The same drive circuit is used to drive each color toner motor yellow, magenta, cyan and black. The circuit construction is as shown below:. LGC provides a control signal to rotate the toner motor.
Note: For the details about the above steps 3 to 8 , refer to G Screws indicated with the marks should be Harness band. Note: Before installing a new toner bag in the machine, make sure that its cap has been removed.
Developer cartridge detection switches. G Screws indicated with the marks should be unscrewd from the back side. Construction This unit is designed to perform the following three functions: To transfer the toner image on the photoconductive drum onto the paper; to separate the paper from the drum; and to transport the paper to the fuser unit. This unit is comprised of the following elements. Recovery Transfer belt Transfer auger Transfer belt recovery blade cleaning transformer blade Drive roller.
Transfer belt Molded with high precision from resin which has a specified level of electrical resistance, the transfer belt has functions to retain and transport the paper sent from the feeding section, as well as to help transfer the toner on the drum surface onto the paper. Meander restricting mechanism Meander restricting plates and aluminum covers are provided at the front and rear sides of the transfer belt, forcing the belt move inside the plates to prevent it from shifting out of position.
Transfer rollers The four transfer rollers Y,M,C and K are mounted between the drive roller and the driven roller to transfer the toner on the drums onto the paper by means of the potential difference from the drums. Each transfer roller is supplied with V of the bias voltage for plain paper copying at normal temperature and humidity. High-voltage probe is required to measure this voltage.
Transfer belt cleaning mechanism The transfer belt cleaning blade scrapes off residual toner from the transfer belt surface. Scraped toner is recovered by the recovery auger and then transported to the used-toner transport unit on the main unit.
Transport guide 1 Transport guide 1 separates from the transfer belt the paper which is electrostatically adhering to the belt, and guides it to the transport guide 2. To perform the separation by means of dielectric force, the guide is made of a grounded metal plate and the ribs on the guide surface are made of insulating material such as resin.
Facing the front side, turn the lever clockwise to the right until 3 oclock and the unit can be drawn out. The push-up mechanism can be operated independently on its paper exit side and feed side to allow the transfer belt unit perform the release movement during black mode copying. Transfer belt drive section The transfer belt unit has its drive roller shaft end formed like a spline, which has its counterpart in the main unit and allows the unit to be securely connected when installed.
The drive unit is located on the rear side of the main unit and equipped with the transfer belt motor and the fuser motor. The transfer drive section transmits the driving force of the transfer belt motor through the timing belt and gears to the transfer belt drive roller. The connection to the drive roller is so structured that the up-and-down movement of the transfer belt unit can be accommodated.
The contact position and release position of the transfer belt are controlled by the transfer belt home position switch and transfer belt limit switch. Suction charger The suction charger charges the transfer belt by corona discharge to allow the belt to attract the paper transported from the paper feeding section. Electrical supply section Supplies power to the transfer rollers and suction charger, applying bias voltage.
Transport guide 2 Guides the paper sent from the transport guide 1 up to the fuser unit. It is made of material which prevents the occurrence of frictional electrification of the paper. Turn it counter-clockwise as seen from the front side and pull it out toward the front. Note: Pull out the cleaning blade pressure spring together with the blade. Pull out Stay. Note: When reassembling the rollers, make sure of the color of terminal contacts: silver for the front side and gold for the rear side.
Terminals Contact: Silver. Power supply connector Suction charger Fixing pin. Heat and pressure are applied to the paper separated from the transfer belt to have the toner fused to the paper. The paper then exits through the exit section into the receiving tray. The upper and lower fuser rollers are constantly spring-loaded, and each have a fuser lamp installed in them.
The upper fuser roller is driven by the fuser motor and the lower fuser roller is forced to follow it. Note, however, that the fuser lamps do not rotate.
The paper, after having finished fusing, is smoothly separated from the upper and lower fuser rollers by the separation fingers. The temperature detection section consists of the thermistors to control the temperature of both fuser rollers, and the thermostats to shut out the power to the fuser lamps if the temperature becomes abnormally high. They stay fixed even while the fuser rollers are rotating. They are pressed against each other to form a nip, through which the paper passes with the toner image facing the upper fuser roller to accomplish toner fusing.
Namely, the toner is fused by the heat from both fuser rollers, and has its heat conductivity improved by the pressure from the lower fuser roller.
This makes the toner easily absorbed into the fibers of the paper for fusing. To prevent the phenomenon of toner adhering to fuser rollers called offsetting and to facilitate toner separation from the fuser rollers, both fuser rollers each have a Teflon coating over their surfaces. In addition, the lower fuser roller is made to have a slightly harder surface than the upper roller so that the paper comes out of the rollers, slightly curling downward. By allowing silicone oil to be deposited to the surface of the upper fuser roller by heat, the upper oil roller helps to prevent toner offsetting and also facilitate cleaning off toner and paper dust adhering to the fuser roller surface during the fusing process.
By allowing silicone oil to be deposited to the surface of the lower fuser roller by heat, the lower oil roller helps to prevent toner offsetting and also facilitate cleaning off toner and paper dust adhering to the fuser roller surface during the fusing process. When the temperature has decreased below a specified value, the thermistor causes the fuser lamp to energize to raise the temperature, and vice versa.
The temperature on the rear is also detected by the upper fuser roller thermistor rear. When either the center or rear thermistor detects a temperature that is higher than the specified temperature, the fuser lamp is turned OFF to always provide a controlled temperature.
The temperature on the rear is also detected by the lower fuser roller thermistor rear. So, the thermostat must be replaced along with the part s which has caused the abnormal condition. A thermistor is a device whose resistance decreases when it detects a high temperature. Therefore, if the fuser roller thermistor becomes open-circuited, the control circuit would determine that the fuser roller temperature is extremely low, and allow the fuser lamp to continue being energized.
As a result, the fuser roller temperature would rise extremely high, possibly triggering the thermostat which is a safety protection device. To prevent this possibility in advance, CPU is set to detect if the thermistor is open-circuited or not. Upper fuser roller surface temperature: C Thermistor resistance: Lower fuser roller surface temperature: C Thermistor resistance: Reference 1. If it is 2 or over, be sure to check the thermistor and fuser lamp.
Then, after repairing or replacing, it is necessary to reset the counter to 0 code in 08 mode and then turn the power ON. Check the bias, high-voltage transformers and charge wires to see if any of them is defective, and repair if necessary.
Relationship between the thermistor output voltage and fuser roller temperature: Approx. Thermistor resistance or over or below Ready C C. This temperature is detected by the thermistors rear ; i. All the other 3 thermistors use the same circuit. The surface temperature of the upper fuser roller varies. The resistance of the upper fuser roller thermistor changes.
The input voltage changes. The main CPU detects this change to determine if the thermistor is abnormal or not. The following table shows the fuser roller temperature setting for the different thick paper modes. Mode Paper Thickness Fuser roller temperature setting Approx. It takes 1 to 4 minutes to switch modes.
Copy speed in the OHP mode is approx. Note: When removing or installing the fuser unit, use the handles on the front and rear sides. Lower oil roller Groove. Note: To install the lower oil roller in the proper direction, use the groove illustrated at the bottom of the previous page as a mark.
Clips Bushings. Gear Bushings Handle. I-2 Lower fuser lamp 1 Remove the front lower lamp bracket 1 screw and disconnect the front lower fuser lamp connector. Notes: 1. When installing the upper and lower fuser lamps, check the rating indicated on the rear side of each lamp, and then install correctly.
Note: While removing the upper thermistors, be careful not to damage the upper and lower fuser rollers. Wrap sheets of paper on both upper and lower fuser rollers, as shown on the right. Note: To protect the upper fuser roller against being damaged, wrap a sheet of paper around the upper fuser roller.
Be careful not to deform the plate springs of the upper thermistors. To protect the lower fuser roller against being damaged, wrap a sheet of paper around the lower fuser roller. Make sure that the flange of each bearing of the upper fuser roller should fit inside the front and rear frames.
Make sure that both bearings of the lower fuser roller should fit on the front and rear pressure levers. Wrap sheets of paper around the upper and lower fuser rollers. Be careful not to damage the thermistors. Gear A Gear B. Note: When installing gears A and B, they should be oriented as shown right and installed correctly.
Be careful not to install them in reverse orientation. After the power-OFF signal has been output, the main system power supply is allowed to retain its rated voltages for the minimum retaining time 10 ms or more and then lets them start dropping.
This is to prevent abnormal operation or damage to the secondary circuit which may be caused by an over-current due to a shorted load or an over-voltage due to a shortcircuit between different voltages. If the protection circuit has been activated and the fuse is not blown out, remove the cause of the shortcircuit and turn ON the power again to clear the circuit.
There are two output channels which are linked with the door switches. Pular no carrossel. Anterior no carrossel. Explorar E-books. Os mais vendidos Escolhas dos editores Todos os e-books. Explorar Audiolivros. Os mais vendidos Escolhas dos editores Todos os audiolivros. Explorar Revistas. Escolhas dos editores Todas as revistas. Explorar Podcasts Todos os podcasts. Explorar Documentos. Toshiba Fc SM. Denunciar este documento.
Fazer o download agora mesmo. Salvar Salvar Toshiba Fc Sm para ler mais tarde. Toshiba e-studio ccc service manual. Pesquisar no documento. Automatic feeding: Copiers cassettes2 pieces standard expandable up Capacity for originals G-2 G-2 D-2 Detects the limit position of the main charger wire cleaning pad. D-2 Detects the surface temperature in the Detects the surface temperature at the Detects the surface temperature in the Detects the surface temperature at the Detects paper in the paper exit area.
Exit-side rear cover Exit-side front cover Paperexit unit cover Exit-side lower cover Exit-side upper cover Slide cover [K] Right top cover 1 Remove the right top cover 3 screws. Left top cover Rear top cover Right top cover [L] Rear top cover 1 Remove the rear top cover 6 screws.
Magenta Red Black Blue Cyan Green Yellow With color copiers, a variety of colors are accomplished by mixing toners of the above three colors at proper ratios. The photoconductive carrier has a special property: when it is exposed to light, the electrical resistance Surface potential V Photoconductive layer Base Structure of the photoconductive drum Example of OPC it possesses increases or decreases with the strength of the light.
Time t Colored area of original White area of original Discharge Charging process process Electric potential of the photoconductive drum Main charger 2 Charging Charging is a process to apply some charge uniformly to the drum surface. Toner Carrier Magnetic roller - Magnetic brush development Inside magnetic rollers, the south and north poles are arranged as shown in the right figure. The deS Lines of magnetic force veloper material forms a brush-like fluff which contacts the photoconductive drum surface.
The toner density has become low: The toner bag is filled with used toner to the limit. NO Any switch on transport path ON? NO Pre-running start temp. NO Toner empty? YES Toner supplied. Image quality control starts. Image quality control ended normally? YES Pre-running operation finished. NO Fuser roller reached ready temp.? NO Transport system control Scanner system control Black copy mode? YES A fixed period of time passed?
YES Carriages move backwards. A fixed period of time passed? Exit sensor OFF? Transport system control completed. Bracket 3 Open the paper-exit unit. Misfeed in copier 13 Misfeed in copier 14 Misfeed in doc. E in Fig. F in Fig. Connectors Connectors 6 Unscrew 6 screws and then remove the bracket. Exposure lamp Reflector Thermostat Mirror 1 a.
CCD PC board Scanner control PC board 6 Automatic original detection unit The size of the original placed on the glass is instantly detected using the automatic original detection sensors APS sensors fixed on the lens cover and the base frame without having to move carriage 1. Stator 0. Transfer clock Transfer section 1 2 3 4 Light energy layer P layer N Details of light receiving element Light receiving section Transfer section Shift register Transfer clock Fig. Glass retainer 2 Raising the feed-side end of the glass , take it out in the direction of arrow.
Connectors B-2 LT series 1 Remove 3 sensors on the base frame 3 screws and 3 connectors. Left top cover Rear top cover 2 Remove the indicator unit 4 screws, 1 harness clamp and 1 connector. Document motor Original scale 5 When removing the belt, first remove the indicator guide 2 screws and then remove the belt. Exposure lamp Contact Note: 1. Spring Connector 5 Unscrew 2 screws and remove the scan motor. Connector 5 Remove the rear-side frame and the indicator unit. ADF bracket 5 Remove the carriage 1.
Wire tension spring 9 Remove the drive pulley 2 setscrews. Drive pulley Wire pulley Note: For reassembly, the wire should be mounted as shown below. Mirror 2 Mirror 3 3 2 3 2 3 Shield bracket Connector Note: 1. Lens damp heater unit 3 2 4 Unscrew 2 screws which are securing the mirror damp heater bracket, disconnect the connector and release the clamp holding the cable. Drum Narrow Wide f lens 1 f lens 2 Equal distance b Face tilt correction Even if assembled with precision, the reflecting faces of the polygonal mirror are tilted slightly to one side relative to the perfect vertical.
Displacement c Laser beam shape The lenses help to correct the beam-spot shape of the laser beam projected onto the drum surface. Cyan beam reflecting mirror Black beam reflecting mirror Magenta beam reflecting mirror Yellow beam reflecting mirror f lens 1 Polygonal mirror Black beam Cyan beam f lens 2 Magenta beam Yellow beam 8 Tilt correction device At the front end of each of the third mirrors for yellow, magenta and cyan beams, a tilt correction mechanism is provided.
Processing unit 4 Remove the feed-side upper cover. Bypass feed unit 8 Disconnect 3 connectors. W : Phase A.
C : Hall element The control system of transfer belt motor is summarized as follows: 1 LGC provides control signals for making the transfer belt motor rotate and for setting its rotation direction.
C : Hall element The control and driving system of developer motor is summarized as follows: 1 LGC provides a signal to control the rotation of the developer motor: CDMON color developer motor , KDMON black developer motor : Motor rotation command 2 The excitation phase switching section works to excite each phase of the developer motor. Connectors A-2 Drum motor 1 Remove the drum unit cover 5 screws. Be careful not to break it.
Stopper 4 Separate the transfer belt coupling from its bearing, draw out the transfer belt coupling along with the belt, and finally take out the transfer belt coupling. Name Bypass separation pad Bypass feed roller Bypass pick-up roller Cassette separation roller Cassette feed roller Cassette pick-up roller Transport roller 1 Bypass paper sensor No. The paper feed roller is so arranged that it rotates in the direction of via a feed clutch at the Spring joint Paper feed roller same timing as the pick-up roller rotation.
C : Hall element 1 LGC provides a signal to control the rotation of the paper feed motor: FDMON: Motor rotation command 2 The excitation phase switching section works to excite each phase of the paper feed motorThe paper feed motor starts rotating. Bypass unit stopper plate A-2 Bypass feed roller 1 Unscrew 4 screws and remove the roller unit. Spring clutch Bypass feed roller A-3 Bypass pick-up roller 1 Remove the clip. Small roller 2 Slide the separation pad in the direction of the arrow and remove it from its fixing plate.
Connector 3 Open the front cover and turn the lever to move down the transfer belt unit. Pre-registration guide 2 Remove 2 screws and the clip, and then the front bracket of the registration unit.
Clip Front bracket of the registraion unit 3 Remove the front and rear registration pressure springs. Registration pressure spring B-3 Paper-dust brush 1 Unscrew the screw, and pull out the brush toward the front. Connector 8 Slide out the cassette. Harness Paper-size switch 11 Remove the clutch bracket 2 screws.
Clutch bracket 12 Remove the separation roller holder 2 screws. Paper-size switch C-3 Cassette feed transport unit 1 Remove the cassette feed unit. Harness cover 5 Unscrew 4 screws, and while shifting the cassette-feed transport unit toward the rear, pull it out toward you.
Paper feed motor Paper feed drive unit Connectors Clip large Bushing Clip small Bushing 3 Remove the large and small clips and the respective bushings. Paper exit unit Clip Connector Edge saddle Electromagnetic clutch 4 Unscrew the screw and remove the lock-lever bracket. Lock-lever bracket 5 Unscrew 2 screws and remove the vertical transport guide unit.
Positioning pin of paper exit unit 3 4 4 [Front side] Vertical transport guide main unit side [Exit side] 4 5 Remove the rear cover. E-3 ADU drive unit 1 Disconnect the connector. Connector 2 Unscrew 4 screws and remove the ADU drive unit. Cleaner home position switch : Detects when the wire cleaner returns to its home position front Note: "Signal name" shown in the following chart and tables is actually preceded with Y, M, C or K, according to its color.
Handles Toner cartridges 4 After having drawn it out to the lock position, hold on both sides of the processing unit, and pressing the blue lock button with your thumb, draw out the unit completely.
Latches 2 Unscrew 2 screws, disengage 3 latches, and remove the EPU cover. Do not put the harness in between the cover and the frame.
Ozone duct 2 Disconnect the discharge LED connector. Lock 5 Holding the front and rear plastic parts of the charger, lift the front end and pull out the charger toward the front side to remove it.
Holder Note: Take care that the shape of the main charger grid would not become deformed. Do not touch the wire directly with your hand. Shutter knob 4 Unscrew 4 screws to separate the developer unit from the EPU frame, and place the developer unit on a flat table.
Press Developer unit cover a b c d 2. A 2 Remove the toner scattering prevention seal holder by sliding it toward the front side 3 slide hooks; be careful not to cause damage to the hooks. Gears Shutter knob 7 Remove the stopper and take out the gear, bearing and collar. Plate pressure spring Bushing Gear 9 Remove the front pole-position adjuster 1 screw and 1 stopper.
Gears Bushings 3 Remove the E-ring and washer on the rear. Front side Rear side Cleaning blade Spring arm frame side Cleaning blade pressure lever Cleaning blade Tension spring frame side Cleaning blade pressure lever Spring arm frame side Tension spring frame side [M] Cleaning blade 1 Unscrew 2 screws and remove the cleaning blade. Drum shaft lock 2 Pull out the drum shaft toward the rear.
Connector 4 Disengage 3 latches and remove the cover. G Screws indicated with the marks should be Harness band unscrewed from the front side. Connectors 6 Remove the motors 2 screws for each. Developer cartridge detection switches [G] Ozone filter 1 Unscrew the screw and pull out the ozone filter holder.
Connectors 4 Unscrew the screws from the ozone exhaust fan and the fuser unit exhaust fan 2 screws for each to remove them. Handles 3 Remove the transport guide 1 2 screws. Transport guide 1 4 Remove the cleaner nozzle using a minus type screwdriver.
Transfer belt recovery blade Recovery auger 9 Lift up the drive side of the frame and fold it about Pull out Stay 13 Unscrew 2 screws and remove the drive roller cleaning felt, pulling it out downwards. Handles [B] Upper oil roller and upper cleaning roller 1 Remove the oil roller cartridge 2 screws.
Upper cleaning roller Upper oil roller Upper Upper oil cleaning roller roller Springs Clips Clips Springs [C] Fuser covers front, rear, top 1 Unscrew 2 screws and remove the fuser cover front.
Lower thermistor bracket Connector 3 Remove the 2 lower thermistors 1 screw for each. Clip 2 Remove the E-ring, gear, screw, handle, pin and 2 bushings from the shaft, and then replace the rollers. Lower exit guide Springs [H] Upper thermostat 1 Remove the oil roller cartridge and fuser cover top. Documentos semelhantes a Toshiba Fc Sm. Ana Lorena Salvatierra. Joshua Wilson. Janusz Grzegorczyk. Andy Man. Anonymous egTruyVdxv. Bitelec Espinal. Huynh Thuc Nghi.
Loraine Lipalam Juanitas. Yury Kobzar. Jannu Jan. Toshiba E-Studio c Service Manual printing guide. Alexander Bonilla. Chatchawan Phatthanasanti. Marco Delsalto. Tonersyalgomas Copiadoras. Toshiba e-studio Service Parts List. Su Thant. Ser GaTe. Doicho Andonov.
0コメント