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O P E R A T I N G I N S T R U C T I O N S...
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May, 25, 1985 INTRODUCTION The Ricoh M5 is a desktop plain paper copier which is carefully manufactured to exacting standards of high per- It consistently yields high contrast copies with formance. a superior finish. This manual contains detailed instructions on the opera- get the maximum tion and care of the M5.
May, 25, 1985 1. INSTALLATION 1-1. UNPACKING PROCEDURE Take out the accessary box and the machir R e m o v e t h e t w o cushion blocks. Open the viny bag and take out the machine. C h e c k t h e q u a n t i t y o f t h e accessories using the follow- list.
May, 25, 1985 1-2. INSTALLATION PROCEDURE Remove the two strips of tape. Slider Z. Move the slider to the left until the right edge of the copier is exposed. 3. Squeeze the release latch and open the top unit. Release Latch 4.
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May, 25, 1985 5. Lower the master release lever. Master Release Lever 6 . R e m o v e t h e t h r e e w e d g e s from the master unit. Note: Do not touch the master ( p u r p l e m a t e r i a l ) a n d avoid’...
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Return the master release lever to its original position. 10 . Shake a cartridge of oner well. 11 . pins h e t o n e r cartridge into the slots on the development unit. Then, turn cartridge counter- clockwise. 12 .
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May, 25, 1985 14. Load paper in the cassette a s shown on page 17, and insert t h e l o a d e d c a s s e t t e until it stops. 15. Install the copy tray on the left side of the machine.
May, 25, 1985 1-3. INSTALLATION REQUIREMENTS The installation Iocatlon should be carefully chosen because environmental condi- 1l-ons greatly affect the performance of a copier Optimum environmental conditions: . Temperature ..10–30° C . Well-ventilated and wide room (50-86°...
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May, 25, 1985 E n v i r o n m e n t s t o a v o i d : Locations exposed to direct sun- Dusty areas ‘ light or strong light (more than 1,500 Iux) 2,000 A r e a s higher than (6,500 ft) above sea level...
M a y , 2 5 , 1 9 8 5 2-3. OPERATOR CONTROLS Check Paper Path Indicator Lights when there is a paper misfeed within the copier. Replace Master Unit Indicator Lights when it is time to change the master unit. Add Toner Indicator Lights when it is time to change the toner cartridge.
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May, 25, 1985 Manual Feed Indicator Lights when copy paper has been inserted. Blinks when the next sheet of copy paper should be inserted. Start Key Press to start copy operation. Clear/Stop Key Press to cancel the copy num- W h i l e c o p y i n g , ber entered.
May, 25, 1985 3. COPYING 3-1. STARTING THE COPIER Turn on the main switch. The Wait indicator ( ~ ) will turn on, which means the copier warming up. When this indica or turns off, copies can be m ade. 3-2.
May, 25, 1985 Enter the number of copies required b y p r e s s i n g Increase Quantity key. (Use the Decrease Quantity k e y i f y o u e n t e r t o o m a n y copies.) copies entered at one time.
May, 25, 1985 3-4. TWO-SIDED COPYING 1. Copy the first side in the nor- mal manner. Then, insert the c o p y i n t o t h e m a n u a l f e e d u n t i l t h e M a n u a l entrance Feed indicator lights.
May, 25, 1985 3-5. COLOR COPYING Blue, green, and red development units and toner are available as options in addition to standard black. (You need a separate development unit for each color.) Example: Making a green and blue copy. Install the green development unit in the copier.
May, 25, 1985 4. REPLENISHING SUPPLIES Lift pull cassette. Load paper into the cassette so that it is flush with the front and side fences. Note: The holds cassette approximately sheets. Press down the corners of the paper stack so that they catch underneath the corner separa- tors.
May, 25, 1985 Paper Storage Paper should always be stored properly, because poor paper condition will result in .poor image reproduction, creased copies, and paper jams. Generally, to avoid absorption of moisture and curling: . Avoid storing paper in humid areas.
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Open the top unit. 2. Take out the toner cartidge. 3. Shake a new cartridge of toner well pins toner cartridge into the slots on the development unit. Then, turn counter- cartridge clockwise. 5. Install the cartridge crank onto the shaft and turn the cartridge crank clockwise to strip off the cartridge seal.
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Toner Storage Store in a COOL, DARK place. NEVER store toner where it will be exposed to heat. . Keep out of reach of children. Do not take internally. Do not lay anything heavy on toner cartridges. 2 0 — –...
May, 25, 1985 5. REPLACING THE MASTER UNIT Squeeze the release latch and open the top unit. Lower the master release lever and slide Out the used master unit. Dispose of the used unit using the provided vinyl bag. R e m o v e t h e t h r e e w e d g e s from the new master unit...
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4. Insert the master unit into the copier. 5. Peel off the polyester cover that protects the master. 6. Returnth e master release lever to its original position. 7. Lower the top unit. — –...
May, 25, 1985 6. TROUBLESHOOTING 6-1. CLEARING MISFEEDS before exiting the copier. Raise the top unit and remove the jammed paper. Note: Do not touch the master (purple material). If the paper is caught inside pull the cassette, cassette and remove the jam- med paper.
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May, 25, 1985 6-2. TROUBLESHOOTNG GUIDE 1. Faint Copies or White Stripes on Copies Agitate the toner. (1) O p e n the top unit and insert the narrow tab of the toner agitator into the slot in development unit cover. from Slide the toner agitator end to end several times.
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May, 25, 1985 Clean the corona wire with the short pad of the cleaner. Gently rub the cleaner along the wire. (4) Keep the cleaner on the holder inside the copier. Copies have Dark stripes or Heavy Background First, try pressing the Lighter key to adjust the image density.
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May, 25, 1985 ” 3 . N o t h i n g H a p p e n s W h e n switch Main is Turn- – No Indicators On – the power cord plugged in? into been firmly inserted the copier? completely clos- the top unit...
May, 25, 1985 6-3. SERVICE CODES The copier’s microcomputer con- stantly monitors mechanical and electrical functions. If a malfunc- will turn on and a service code will be displayed in the copy count- er. If this happens, turn off the main switch, wait a few seconds, and then turn it on again.
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May, 25, 1985 7. MAINTENANCE To maintain a high copy quality, clean the exposure glass and platen cover regularly. Exposure Glass Clean the exposure glass with a soft cloth and commercial glass cleaner. . Platen C o v e r Clean the platen cover with a damp If stains do not come off, cloth.
May, 25, 1985 8. TRANSPORTING THE COPIER Before moving the copier from its place of installation, remove the copy tray and secure the slider with strips of tape. The copier may be badly damaged if it is moved when the slider is not pro- F o r M A X I M U M perly secured.
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: Approximately kg (44 lb) Note: To obtain the best copies, use Ricoh FT paper or a similar bond paper, Ask your sales or service representative to recommend a brand of paper that is suitable for use with the M 5 .
May, 25, 1985 Desktop (Moving platen) Configuration: Mono-component dry toner process Copy Process: Originals: Book/sheet .-. ” A4 (210 x 297 mm) Maximum Original Size: Letter (8-1 /2” x 11”) Maximum: A4 (210 x 297 mm) Copy Paper Size: Letter (8-1/2” x 11“) Minimum: Business card size (49 x 84 mm, 2“...
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May, 25, 1985 (W x D x H) Dimensions: Without Cassette and Copy Tray 404mm x 485 mm x 225 mm 8 - 7 / 8 ” ) (16“ X 19“ X With Cassette and Copy Tray 610 mm x 485 mm x 225mm ( 2 4 ”...
May, 25, 1985 Power Distribution — AC Power Distribution — -.” When the main switch is turned on, ac input voltage is supplied to the dc power supply board, ac drive board, and the triac. After the main board becomes active, it activates the triac, which then supplies ac power to the fusing lamp.
May, 25, 1985 – DC Power Supply – This copier uses two dc power levels: +5 volts and +22 volts. The 29.5 Vac input from the transformer is rectified by DBA20B. The chopper-stabilized amplifier smoothes the output and amplifies the potential to +22 volts. This +22 volt output drives the dc components that have a relatively large current requirement, such as the power packs and solenoids.
25, 1985 May, – Power-On Reset – The reset circuit outputs a one-shot LOW pulse which resets the CPU. When the main switch is turnedon, +3.9 volts is applied to pin 6 of ICI 02, and the output becomes LOW. The output of IC102 stays LOW until Cl 05 charges to +3.9 volts (which takes about 35 ins).
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SECTION 3 SECTIONAL DESCRIPTIONS Master Unit ............Charge .
May, 25, 1985 MASTER UNIT Introduction lade Overflow Sensor caning Section The master unit consists of the master belt, the grid plate, and the cleaning section. The master is an organic-photoconductor belt. It makes two rotations per copy. The master has the characteristics of high electrical resistance in the dark, low electrical resistance when exposed to light, and flexibility.
May, 25, 1985 2. Master Sensor Master Sensor Master Sensor The master sensor detects a reflective plate (called the sensor plate) on the edge of the master belt This tells the CPU the location of the master bond seam and sets start once each master rotation.
May, 25, 1985 3. Master Sensor Circuit Main Board The main board applies +5 volts from CN1 02-12 to CN709-1 of the master sensor. A long as the However, when the sensor plate on the master belt sensor is off, +5 volts is present at CN102-13. passes under the sensor, the phototransistor turns on and CN102-13 drops to O volts.
May, 25, 1985 CHARGE 1. Charge Corona This model uses a single wire corona unit to charge the master (organic photoconductor belt). The corona wire generates a corona of negative ions when a high negative voltage is applied to it by the charge power pack.
25, 1985 May, 2. Charge Corona Circuit Main Board Power Pack-Charge The dc power supply board supplies +22 volts through the interface board and the main board to CN706-I as the power input of the charge power pack. CN706-3 is the trigger input. the 24th pulse after the sensor plate on the master is detected, the CPU drops CN102-4 from +22 volts to O volt.
May, 25, 1985 Replacement of Parts — Charge Corona Wire – .-. . Front Cover Rear Endblock remove the master Open the upper clamshell and unit. (Do not place the master unit where it will be exposed to strong light.) Unplug the high voltage cable from the power pack.
May, 25, 1985 – Charge Corona Power Pack – Ground Wire 1. Remove the front cover. (See page 3-79.) 2. Disconnect the 3P connector from the power pack. 3. Remove the ground wire from the frame (1 screw). 4. Remove the charge power pack (1 screw). 5.
25, 1985 May, EXPOSURE 1. Introduction Exposure Light While the slider moves forward (in the arrow direction), a fluorescent lamp illuminates the surface of the original on the exposure glass. An image of the original is reflected through the fiber optics onto the master surface. Where the light strikes the master surface, the electrical resistance of the master surface decreases Where no light strikes the master surface, the and the charge on the master surface is dissipated.
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May, 1985 Original Slider Exposure Glass Copy Paper The master’s rotation speed is the same as the forward speed of the slider. So, after exposure, the charge pattern remaining on the master surface is an exact mirror replica of the original image as This charge pattern is called the latent image.
May, 25, 1985 2. Slider Drive Reverse Clutch Slider (Forward) When the motor turns on, drive is transferred to the input gear as shown above. Drive then main passes through the clutch unit to the slider drive gear (pinion). The slider drive gear is engaged with the rack underneath the slider, and moves the slider as discussed in the following sections.
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Rest Position (1.8) (2.6) Home Position Forward (3.7) Cam A Home Position SW Return Position (4) Reverse (5) Cam B 3-11...
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May, 25, Rest Position When the Start key is pressed, the main motor turns on and the slider solenoid stays off. Since the slider solenoid is off, the reverse pawl engages the ratchet ring of the reverse clutch. The reverse clutch then engages and the slider moves from the rest position towards home position.
May, 25, 1985 3. Clutch Operation (Figure B) (Figure A) Solenoid Solenoid .- . Input Gear Clutch Sleeve Ratchet Ring Loosen Tighten Slider Slider Drive Gear Slider Drive’ Gear Gear B — Forward – Before the slider solenoid turns on, the clutch sleeve turns freely. This allows the clutch spring to be loose (figure A).
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25, 1985 May, Input Gear Input Gear Slider Drive Gear Slider Drive Gear Slider Gear — Reverse – When the slider solenoid turns off, the spring on the reverse pawl rotates the pawls counterclockwise. (page 3- 11 figure 5) The reverse pawl engages with the reverse ratchet ring. The clutch then engages as discussed previously under “- F o r w a r d –...
25, 1985 May, Slider Lock Mechanism Slider Gear B Lock Ratchet Slider When the clamshell is opened, a spring forces the slider stopper to engage with the slider lock ratchet on gear B. The stopper prevents gear B from turning counterclockwise, so the slider drive gear can- not turn clockwise.
May, 25, 1985 5. Slider Control Circuit Slider Solenoid When the slider home position is confirmed, the CPU drops CN103-12 from +22 volts to O volt This occurs 63 pulses after the sensor plate on the master is which energizes the slider solenoid. detected.
25, 1985 May, 6. Exposure Lamp Control Circuit Exposure Sensor Main Boar-cl The control circuit shown above maintains a stable exposure lamp light output. The major compo- nents are the main board, the exposure lamp stabilizer, and the exposure sensor. –...
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May, 25, 1985 — Exposure Sensor — The exposure sensor measures the intensity of the light output by the exposure lamp and provides a feedback signal to the main board. The sensing element is a photodiode (PD). It regulates current in response to the light intensity of the exposure lamp.
25, 1985 May, 7. Lamp Heater Circuit heater is installed next to the surface of the exposure lamp. light intensity within the range of Heating the lamp decreases the time required to bring the lamp’s exposure compensation. This lamp warm-up time depends on the selected image density level and atmospheric tem- perature.
25, 1985 May, 8. Replacement of Parts — Exposure Glass – .-. . 1. Hold the front side of the platen cover and push it towards the rear to disengage the fasteners. Handle the platen cover carefully. CAUTION: The fasteners break off under strong force. 2.
25, 1985 May, — Fiber Optics — Reflector Leaf Spring 1. Remove the 2. Remove the 3. Remove the 4. Remove the 5. Remove the 6. Remove the 7. Pull out the NOTE: 1. Do not touch the upper and lower surfaces of the fiber optics. 2.
May, 25, 1985 – Exposure Lamp – .-. ” Exposure Lamp Front E Term Aperture Surface sure Lamp 1. Remove the front and rear covers. (See page 3-79.) 2. Remove the slider. (See page 3-79.) 3. Remove the exposure cover (1 screw). 4.
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25, 1985 May, Slider Drive Gear Slider Clutch Bracket Pulse Generator Bracket 2P Connector Follow steps 1 through 6 of Exposure Lamp Replacement. (See page 3-22.) Remove the accuride rail (3 screws). Remove the pulse generator bracket (1screw). Take off the slider clutch bracket (3 screws) and unhook the slider stopper spring from the bracket.
May, 25, 1985 — Exposure Lamp Stabilizer – -.’ Exposure Lamp Stabilizer 1. Remove the front cover. (See page 3-79.) 2. Disconnect the 5P and 3P connectors from the stabilizer. 3. Remove the exposure lamp stabilizer (2 screws). 3 - 2 4...
May, 25, 1985 – Slider Clutch – Remove the slider and rear cover (See page 3-79.) Disconnect the two 2P and two 3P connectors. Remove the pulse generator bracket (1 screw). Remove the wire harness from the wire clamp. Remove the slider clutch bracket (3 screws) and bracket.
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May, 25, 1985 Forward Clutch Reverse Clutch Install new clutch springs in the clutches. NOTE: The forward and reverse clutch springs are similar, but they coil in different direc- (See the figure.) Be careful not to mix them up. tions. 10.
25, 1985 May, – Slider Solenoid – Slider Female Connector Remove the slider and rear cover. (See page 3-79.) Disconnect two 2P and 3P connectors. Remove the pulse generator bracket (1 screw). Remove the slider clutch bracket (3 screws), and unhook the slider stopper spring. (Do not break the slider stopper pin.) Remove the solenoid 2P female connector from the slider clutch bracket.
May, 25, 1985 – Home Position Switch – Bracket Shaft (See page 3-79.) 1. Remove the slider and the rear cover. 2. Remove the home position switch together with the plastic bracket using needle-nose pliers. 3. Remove the 2P female connector from the slider clutch bracket. NOTE: After installing a new switch, make sure it turns ON and OFF.
May, 25, 1985 Parts 9. Cleaning of — Fiber Optics — Slider Fiber Optics — Upper Side of Fiber Optics – 1. Move the slider to the right. the accuride rail. 2. Remove the stud screw from 3. Move the slider to the left until the fiber optics are visible. 4.
25, 1985 May, 10. Lubrication of Parts – Fiber Optics Holder – slider to the right. Move the the stud screw from the accuride rail. Remove 3. Move the slider to the left until the fiber optics holders are visible. 4.
May, 25, 1985 DEVELOPMENT 1. Black Development Master Belt Bias Brush Mixing Plate Toner Supply Bar \ Development Roller Toner Metering Blade — Introduction — The development unit transforms the electric latent image on the master surface into a visible toner image.
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25, 1985 May, – Development Roller – Floating Electrode Magnetic Insulating Layer The development roller used in this copier is unique. The development roller rotates at approximate- ly 300 rpm. Its surface has a floating electrode layer which insulates the surface charge from the conductor.
25, 1985 May, Color Development Toner Cartridge Bias Brush Toner Mixing Plate – Color Toner – The major difference between color development and black ferrite development is that color toner Color toner adheres to the development roller because of static contains no ferrite material.
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May, 25, 1985 – Color Development Roller – Blade development roller The difference between the ferrite-type material of the floating electrodes. The color development roller has carbon floating electrodes imbedded in it instead of cop- per. Carbon has a high co-efficient of friction and a low electrical resistance, which helps in creating static electricity.
May, 25, 1985 3. Bias Application Black Toner Develo Development as Plate erminal Color Toner Development Toner Metering Blade Develop Bias Plate Bias Terminal Bias Brush NOTE: (The color toner development) In this copier, the development bias is applied to the toner metering blade, the bias brush, and the As the development roller turns past the blade, the bias charge core of the development roller.
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May, 25, 1985 3. Bias Application Black Toner Develo Development as Plate erminal Color Toner Development Toner Metering Blade Develop Bias Plate Bias Terminal Bias Brush NOTE: (The color toner development) In this copier, the development bias is applied to the toner metering blade, the bias brush, and the As the development roller turns past the blade, the bias charge core of the development roller.
25, 1985 May, 4. Drive Mechanism Black Toner Development Color Toner Development 6 4 3 Drive of black toner development: Drive of color toner development: 1 Timing Belt Belt 1 Timing 2 Timing Belt Pulley 2 Timing Belt Pulley 3 Idler Gear A 3 Idler Gear A Development Roller Gear A 4 Development Roller Gear B...
25, 1985 May, 5. Toner End Mechanism Insufficient Condition Sufficient Condition Toner Toner End Sensor Drive Spring The toner end detection mechanism uses an actuator and a photointerruptor. When the toner tank is full, the actuator stays in the photointerruptor. However, when the tank contains approximately 60 grams of toner, the actuator leaves the photo interrupter one time for every revolution of the toner mixing gear.
25, 1985 May, 6. Development Cover Mechanism Cover When the development unit is in the copier, the cover spring rotates the cover lever clockwise as The sector gear on the cover lever turns the cover gear, opening the develop- shown by the arrow. At this time, the cover arm enters a slot on the upper feed guide which is lower ment roller cover.
May, 25, 1985 7. Bias Circuit The above diagram shows bias control circuit in block form. The dc power supply board supplies +22 volts to CN714-1 of the transfer/bias power pack. The de/de converter changes this input to the high voltage used for development bias. The bias trigger (CN101-7) is LOW active.
May, 25, 1985 8. Toner End Sensor Circuit Main Board The CPU monitors the toner end sensor to determine whether a toner end condition exists. If CN103-8 drops to LOW three of more times during machine cycle, the CPU stops the copier and lights the Add Toner indicator.
May, 25, 1985 9. Replacement of Parts – Toner Metering Blade – Cover 1. Open the upper clamshell and remove the development unit. 2. Remove the toner cartridge. 3. Remove the front cover of the development unit (1 screw). 4. Remove the roller cover bracket (1 screw), and take off the development roller cover. 5.
May, 25, 1985 IMAGE TRANSFER AND SEPARATION 1. Image Transfer Master Belt The relay rollers feed the copy paper through the transfer entrance guides to the transfer section. A high negative voltage is applied to the transfer corona wire, and as a result the corona wire generates a cloud of negative ions.
May, 25, 1985 3. Transfer Corona Circuit The above diagram shows the transfer corona control circuit in block form. The dc power supply board supplies +22 volts to CN714-1 of the transfer/bias power pack. The de/de converter changes this input to the high voltage used by the transfer corona. The CPU drops CN101-7 to O volt to turn on the transfer corona.
25, 1985 May, 4. Replacement of Parts — Transfer Corona Nylon Wire — .- . Transfer Corona Unit Unit Nylon Wire Open the upper clamshell and remove the development unit. Swing open the upper guide. Remove the transfer unit stopper (1 screw). Use a stubby screwdriver. power pack using needle-nosed Swing up the corona unit and unplug the transfer cable from the pliers.
25, 1985 May, — Transfer Corona Wire — Front Endblock Cover .-. . Rear Endblock Cover Front Endblock Stud Follow steps 1 through 5 of Transfer Corona Nylon Wire Replacement. (See page 3-44.) (See the figure.) Gently remove the front and rear endblock covers together with the wire. Replace the corona wire as follows: Hook the large eyelet of the wire to the rear stud.
May, 25, 1985 — Transfer/Bias Power Pack – Power Pack 1. Follow steps 1 through 5 of Transfer Nylon Wire Replacement. (See page 3-44.) 2. Disconnect the 3P connector and the bias cable (B). 3. Remove the power pack (2 screws). 3 - 4 6...
25, 1985 May, CLEANING 1. Introduction Cleaning Blade After image transfer, the master moves past the cleaning section. There, the cleaning blade wipes off any toner remaining on the master surface. The toner hat drops is then moved into the used toner tank by the toner sweeping bar. 3 - 4 7...
25, 1985 May, 2. Toner Overflow Detection Toner Overflow Sensor Full This copier uses a photosensor to detect toner overflow (used toner tank full). When the toner tank is empty the rubber cup rests inside the master unit. However, when the toner tank is full, toner pushes the rubber cup outward.
May, 25, 1985 Toner Overflow Sensor Circuit The main board applies +5 volts to CN708-1 to power the toner overflow sensor. The sensor signal is applied to the main board at CN102-8. When the rubber cup enters the photosensor, CN102-8 goes from LOW to HIGH and the Replace Master indicator turns on.
25, 1985 May, QUENCHING 1. Introduction Quenching Lamp Master Unit Quenching Lamp After cleaning, the quenching lamp illuminates the master surface. This illumination is to prepare for the next copy cycle. It neutralizes any latent image charge remaining on the master surface. This machine uses a row of LEDs for master quenching.
May, 1985 2. Quenching Lamp Circuit To light the quenching lamp, the CPU drops CN102-9 to LOW. This occurs at almost the same time that the Start key is pressed. The quenching stabilizer receives +22 volts at CN707-1. When the main motor turns off, CN102-9 goes back to HIGH, turning off the quenching lamp. 3.51...
M a y , 2 5 , 1 9 8 5 3. Replacement of Parts – Quenching Lamp – .- . Holder / ’ Quenching Lamp Quenching Lamp Connector (See page 3-79.) 1. Remove the front cover. 2. Disconnect the quenching lamp connector. 3.
25, 1985 May, PAPER FEED AND REGISTRATION 1. Introduction Feed Roller Relay Rollers ntrance Paper can be fed either automatically from the cassette or manually one sheet at a time. The capacity of the cassette is about 100 sheets (depending on paper thickness). To start the paper feed sequence from the cassette, the pick-up roller rotates to drive the top sheet of paper forward.
25, 1985 May, 3. Paper Feed Mechanism Pick-up Roller (Figure C) Spring Clutch , Paper Feed Solenoid When the roller is not in use, the flat-side is face-down The pick-up roller has a semi-circular shape. (Figure A, dotted line). When the master sensor detects the sensor plate, the paper feed solenoid turns on for 17 pulses.
25, 1985 May, 4. Registration Registration Plate VVhen the leading edge of the paper contacts the registration plate, the paper stops. feed rollers then start to slip. This slippage occurs because of the low pressure between the feed rollers and follower roller on the development lower cover.
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May, 25, 1985 5. Paper Feed and Registration Timing Interface Board The main board controls all of the components shown the above diagram in the same way. The dc power supply board supplies +22 volts through the interface board to the paper feed and registration solenoids.
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May, 25, 1985 When the slider moves away from the home position, the home position switch opens and CN103-9 At the proper time, depending upon the DIP SW selection, the changes from O volt to +5 volts. (See the following table.) registration solenoid turns on to lower the registration plate.
May, 25, 1985 6. Replacement of Parts – Paper Feed Solenoid – Paper Feed Clutch Feed Solenoid Paper Paper Feed Solenoid Paper Feed Clutch’ Open the upper clamshell and remove the development unit. Remove the front inner cover (2 screws). Disconnect the 2P connector.
25, 1985 May, – Registration Solenoid – Upper Guide r Cover Plate Front Open the upper clamshell and remove the development unit and cassette. Remove the front inner cover (2 screws). Remove the development lower cover (2 screws). Remove the upper guide. Remove the lower guide plate (4 screws).
May, 25, 1985 – Paper Feed Sensor — ---- Feed Sensor 1. Follow steps 1 through 5 of Registration Solenoid Replacement. (See page 3-59.) 2. Disconnect the 2P connector on the interface board. 3. Remove the paper feed sensor (1 screw). 3 - 6 0...
25, 1985 May, 7. Adjustment of Parts — Leading Edge Registration – .-.’ DIP SW DIP SW TABLE Ruler Lay a ruler on the exposure glass as shown in the figure. Make a few copies and check that the leading edge registration is within standard. Leading Edge Registration Standard: If it is out of the standard, adjust it using DIP SW No.
May, 25, 1985 TRANSPORT Transport Belt , Guide Plate Belt Drive Transfer Corona Wire Main Motor The transport belt is only used After image transfer, paper is fed by the relay roller to the fusing unit. cards). for small-sized paper (such as business The transport belt continuously turns when the main motor is on.
25, 1985 May, IMAGE FUSING 1. Introduction paper with the transferred image on it is carried from the image transfer section to the fusing Copy By applying heat and pressure, the fusing Paper then passes unit. between the fusing rollers. rollers (the hot roller and the pressure roller) fuse the toner image to the paper.
25, 1985 May, 2. Drive Mechanism .“ The fusing unit is driven by the main motor through a series of gears. The pressure roller is friction driven by the hot roller. Rotating the paper reverse knob counterclockwise removes jammed paper from the fusing unit.
May, 25, 1985 3. Fusing Control TH Temp 115° C Ready Room Temp. After the TH senses 160 degrees Celsius, the enable signal changes to a switching signal. The fus- This decreases the rate of heat application and ing lamp switches on 125 ms and then off 500 ms. prevents excessive over shoot.
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May, 25, 1985 The switching signal is turned on (switching power) when the TH detects a temperature less than 182 degrees Celsius and is turned off again when TH detects 185 degrees Celsius. The only exception is At that time, if the hot roller is less than 185 degrees Celsius, the when the main motor turns on.
25, 1985 May, 4. Fusing Lamp Control Circuit The circuit has both ac and de components, Above is a schematic of the fusing lamp control circuit. which are coupled through a photocoupler. The following discussion centers on circuit operation from the viewpoint of the signals that can be observed between the main board and the ac drive board.
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May, 25, 1985 — Hardware Overheat Protection — In case the software overheat protection fails, a thermoswitch is installed in series with the fusing 245 degrees Celsius, the thermoswitch opens. lamp. If the thermoswitch temperature reaches .- . – Service Call Conditions – Thermistor Circuit Open: If the temperature detected through the TH does not reach 2 degrees Celsius (300 kilo-ohm) within...
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May, 25, 1985 Replacement of Parts 1. Remove the copy tray. Remove the rear cover (2 screws). Remove the front cover. (See page 3-79.) Open the upper clamshell and stand it straight. CAUTION: Place a block in front of the exit cover. (See page 3-80.) Open the exit cover and remove the fusing unit cover (2 screws).
May, 25, 1985 – Hot Roller – 1. Follow steps 1 through 4 of the fusing lamp replacement. (See page 3-70.) 2. Open the exit cover and remove the fusing unit cover (2 screws). 3. Remove the top frame (2 screws). 4.
May, 25, 1985 — Hot Roller Strippers — 1. Remove the copy tray. 2. Remove the exit cover (2 screws). 3. Lower the exit assembly. 4. Unhook the pressure springs. 5. Remove the stripper pawls. NOTE: Do not damage the hot roller or stripper pawls. 3 - 7 3...
25, 1985 May, – Fusing Thermoswitch – Follow steps 1 through 4 of Fusing Lamp Replacement. (See page 3-70.) Open the exit cover and remove the fusing unit cover (2screws). Take off the top frame (2screws). Remove the thermoswitch (2screws). careful not to damage the pressure and hot rollers.
May, 25, 1985 OTHER MECHANICAL A ND ELECTRICAL COMPONENTS 1. Safety Switch The safety switch is installed in series with and prior to the main switch. When this switch turns off, it cuts ac power, turning off all electrical components in the copier. This safety switch is on only if both the front and rear sides of the safety switch lever are pressed down.
May, 25, 1985 2. Pulse Generator Timing Belt The copier’s CPU controls the timing of all machine operations based on how many pulses it has received from the pulse generator. Pulses are generated by the rotation of a perforated disk within a photocoupler.
May, 25, 1985 3. Jam Sensing Paper Feed Sensor Exit Sensor The paper feed sensor and the exit sensor monitor the movement of the copy through the paper path. If the CPU determines that a jam condition exits, it displays either the Check Paper Path or Check Cassette indicator depending on the location of the jam.
May, 25, 1985 4. Indicator Board J - 9 J - 5 J - 4 — The LEDs are energized by clock pulses from the elements. This copier uses only LEDs for display CPU. light any particular LED, the CPU drops the appropriate control line to O volt at the same time that This operation is illustrated below.
May, 25, 1985 5. Replacement of Parts – Exterior Parts – Slider 1. Front Cover Remove 4 screws. To get at the top screws, move the slider left and right. NOTE: After installing the front cover, the edge of exposure glass must be in the groove of the front cover.
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May, 25, 1985 Torsion Bar Remove the front and rear covers. (See page 3-79.) a block in front of the exit cover. Place NOTE: This block must have a height of approximately 50 mm (2”). Raise the upper clamshell part way and the hinge.
May, 25, 1985 – Ozone Filter – Toner Overflow Sensor 1. Open the upper clamshell and remove the master unit. (Avoid exposing the master unit to light.) 2. Remove the copy tray and the two stud screws, then stand the upper clamshell straight up.
25, 1985 May, — Main Motor – AC Power Supply Board 2P Connector Main Motor Capacitor T i m i n g B e l t “ (See 1. Remove the rear cover. page 3-79.) 2. Remove the master unit. 3.
25, 1985 May, – Main Board – 1. Remove the front cover. (See page 3-79.) 2. Disconnect all 4 connectors from the main board. 3. Remove the main board assembly (3 screws). 3 - 8 4...
May, 25, 1985 – Dc Power Supply Board – Supply Board 1. Follow steps 1 through 3 of Transfer Corona Nylon Wire Replacement. (See page 3-44.) 2. Remove the front inner cover (2 screws). 3. Swing open the transfer unit. 4.
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May, 25, 1985 – Transfer Guide Plate – 1. Follow steps 1 through 5 of Transfer Corona Nylon Wire Replacement. (See page 3-44.) 2. Remove the mylar from the guide plate. 3. Stick a new mylar guide as shown in the figure. 3 - 8 7...
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May, 25, 1985 General Place a block in front of the exit cover before removing the two stopper screws on the clamshell hinge. The upright clamshell needs to rest on a block with a height of approximately 50 mm (2”) to prevent damage to the baseplate. (See page 3-80.) Do not insert anything in the safety switch slot when the upper clamshell is open.
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May, 25, 1985 Installation When only one toner cartridge is used at machine installation, the Add Toner indicator lights after To prevent customer dissatisfaction, make sure that customers use two toner about 200 copies. cartridges to fill the toner-tank at initial set-up. M a s t e r Dispose of used master units in a plastic bag according to local regulations (as plastic material).
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May, 25, 1985 Fusing 1. Be careful not to damage the edge of the strippers or their springs. 2. Make sure both ends of the fusing lamp are properly set on the terminals. Paper Feed Do not allow the pick-up roller, turn rollers, feed rollers, or relay rollers to become oily or dirty Operator Instruction 1.
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May, 25, 1985 4. Master Unit: Instruct the operator on how to install a new master unit. Avoid exposing the master unit to light or heat. 5. Toner Cartridge Instruct the customer on how to install the toner cartridge. Instruct the customer to peel off the seal with the crank. (Peel off the seal completely.) 4 - 4...
RICOH M50 PARTS CATALOG RICOH COMPANY, LTD. First Edition May 1992...
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PARTS CATALOG INTRODUCTION This chapter instructs you the numbers and names of these parts on this machine. INDEX to PARTS CATALOG 1. EXTERIOR (A094) ................2 10. MAIN BOARD (A094) ................ 21 2. OPTICS SECTION (A094) ..............4 11. POWER SUPPLY BOARD (A094) ............23 3.
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5. DEVELOPMENT UNIT - COLOR (A094) Index Q'ty per Index Q'ty per Part No. Description Part No. Description Assembly Assembly 5214 3152 Rear Development Cover 1030313 0060M Philips Pan Head Screw - M3x6 5921 3111 Gear - 16T 0313 0060W Philips Pan Head Screw - M3x6 5203 3124 Coupled Gear - 12T/22T 0443 0060W Hexagon Head Tapping Screw - M3x6...
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6. FUSING SECTION (A094) Index Q'ty per Index Q'ty per Part No. Description Part No. Description Assembly Assembly A094 4207 Fusing Cover - 220/240V 5447 2769 Stepped Screw A094 5316 Rear Fusing Harness A094 4087 Lower Exit Guide A094 5315 Front Fusing Harness 5214 4127 Exit Roller...
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Index Q'ty per Index Q'ty per Part No. Description Part No. Description Assembly Assembly 0313 0060M Philips Pan Head Screw - M3x6 0313 0120W Philips Pan Head Screw - M3x12 0443 0060W Hexagon Head Tapping Screw - M3x6 0443 0080W Hexagon Head Tapping Screw - M3x8 0720 0030E Retaining Ring - M3 0720 0040E Retaining Ring - M4 0720 0060E Retaining Ring - M6...
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7. DRIVE SECTION (A094) Index Q'ty per Index Q'ty per Part No. Description Part No. Description Assembly Assembly 5214 5820 Holder - AC Drive Board Not Used A094 5615 AC Drive Board Ass’y 5203 1828 Bevel Gear - 36T (Return) A094 5605 Main Motor - AC 220V 11W 5203 1831...
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8. UPPER UNIT (A094) Index Q'ty per Index Q'ty per Part No. Description Part No. Description Assembly Assembly 5214 1120 Rear Hinge - Top Unit 0443 0060W Hexagon Head Tapping Screw - M3x6 5214 5810 Spacer - Toner End Sensor 0443 0120W Hexagon Head Tapping Screw - M3x12 A094 5231 Photocoupler...
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9. LOWER UNIT (A094) Index Q'ty per Index Q'ty per Part No. Description Part No. Description Assembly Assembly 5214 5842 Safety Switch Lever 0313 0600W Philips Pan Head Screw - M3x6 A094 5640 AC Power Supply Board Ass’y - 220/240V 0314 0060M Philips Pan Head Screw - M4x6 A094 5637 Receptacle - 220/240V...
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10. MAIN BOARD (A094) Index Q'ty per Index Q'ty per Part No. Description Part No. Description Assembly Assembly 5214 5151 Main Board 1407 0975 IC - HD7407P 5214 5153 CPU - Main Board 1407 1091 IC - HD74LS02P 1400 0328 Transistor - 2SA720 1401 0631 Diode - 1S2075K...
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11. POWER SUPPLY BOARD (A094) Index Q'ty per Index Q'ty per Part No. Description Part No. Description Assembly Assembly 5214 5100 Power Supply Board Ass’y 1607 0097 Choke - 300mH, 2A 1408 0402 IC - STR2024 1408 0331 IC - MPC7805H 1405 0150 Rectifier - DBA20B 1402 0467...
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15. UPPER UNIT HARNESS - FRONT (A094) Index Q'ty per Index Q'ty per Part No. Description Part No. Description Assembly Assembly 5214 5301 Upper Unit Harness - Front 1102 2008 Socket Housing - 14P 1100 1329 Contact 1102 1983 Connector - 3P 1100 1329 Contact 1102 1982...
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17. SPECIAL TOOL (A094) Index Q'ty per Index Q'ty per Part No. Description Part No. Description Assembly Assembly 5214 9500 Test Chart OS-A4 (10 Pcs/Set) 5214 9501 Test Chart OS-A4 (100 Pcs/Set) 5447 9078 Heat Resisting Grease MT-78 5420 9507 Digital Multimeter - Beckman 5420 9508 Test Lead Kit...
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Paper and Paper and Part No. Part No. Description Description Index No. Index No. A094 4179 Lamp Holder Spring 13- 48 A094 0025 Power Supply Cord - 220V 19-150 A094 4207 Fusing Cover - 220/240V 13- 1 A094 1121 Left Cover 5- 8 A094 4411 Pressure Roller...
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Paper and Paper and Paper and Paper and Part No. Part No. Part No. Part No. Description Description Description Description Index No. Index No. Index No. Index No. AA11 3028 Front Outer Insulator 13- 50 5214 1118 Front Hinge - Top Unit 17- 20 AD03 0030 Development Roller...
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Paper and Paper and Part No. Part No. Description Description Index No. Index No. 5214 1856 Idle Gear - 22T 15- 22 5214 2556 Paper Feed Clutch 7- 36 5214 1857 Belt Drive Shaft 15- 18 5214 2563 Gear - 38T 7- 35 5214 1858 Coupling Cover...
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Paper and Paper and Part No. Part No. Description Description Index No. Index No. 5214 3103 Gear - 18T 9- 2 5214 4104 Fusing Unit Mylar 13- 57 5214 3104 Toner Supply Shaft 9- 15 5214 4107 Bushing - 20x28x8mm 13- 11 5214 3105 Spring - Toner End Lever...
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Paper and Paper and Part No. Part No. Description Description Index No. Index No. 5214 5235 Paper Feed Sensor 7- 20 5214 7804 Rear End Cover - Transfer 7- 16 5214 5238 Micro Switch - Scan 15- 5 5214 9001 Corona Wire - 10pcs/Set 5- 36 5214 5260...
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7-106 0720 0040E Retaining Ring - M4 15-126 0313 0120W Philips Pan Head Screw - M3x12 13-106 0720 0050E Retaining Ring - M5 7-151 0313 0250W Philips Pan Head Screw - M3x25 7-107 0720 0060E Retaining Ring - M6 7-127...
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Paper and Paper and Part No. Part No. Description Description Index No. Index No. 0965 4012W Philips Pan Head Screw - M4x12 17-141 1103 1446 Wafer - 2P 25- 17 0965 4012W Philips Pan Head Screw - M4x12 19-141 1103 1768 Connector - 2P 27- 8 1100 0280...
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Paper and Paper and Part No. Part No. Description Description Index No. Index No. 1405 0150 Rectifier - DBA20B 23- 4 1607 0097 Choke - 300mH, 2A 23- 1 Resistor - 100 Ω 1/4T ±5% 1405 0153 Triac - TG16C40 13-149 1611 4101 23- 20...