Ricoh FT4215 Service Training Manual Download

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FT4220/4222/4215

SERVICE TRAINING MANUAL

Summary of Contents for FT4215

Page 1: ...FT4220 4222 4215 SERVICE TRAINING MANUAL ...

Page 2: ...careful to avoid touching those components with your bare hands HEALTH SAFETY CONDITIONS 1 Never operate the copier without the ozone filter installed 2 Always replace the ozone filter with the specified one at the specified interval 3 Toner and developer are non toxic but if you get either of them in your eyes by accident it may cause temporary eye discomfort Try to remove with eye drops or flush...

Page 3: ...cartridge or the used toner Toner dust may ignite suddenly when exposed to open flame 2 Dispose of used toner developer and organic photoconductors according to local regulations These are non toxic supplies 3 Dispose of replaced parts in accordance with local regulations ...

Page 4: ...reasing the fusing temperature when the copier is not in use The energy saving ratio can be changed by SP mode The automatic energy saver mode is selected by SP mode 3 User Program Mode FT4220 Yes FT4222 Yes FT4418 No FT4421 Yes 4 Edge Erase Center Erase Edge Center Erase The edge erase center erase and edge center erase modes are added as preset user program modes The erase margin can be changed ...

Page 5: ...bsorb electrical noise The duplex unit for the FT4418 series cannot be installed on the Pigeon series 2 Optional DC Power Supply Unit FT4220 only The optional dc power supply unit Model Code A525 is unique to the FT4220 The optional dc power supply unit consists of the following parts DC power supply board Transformer DF interface harness The optional dc power supply unit is required when the DF a...

Page 6: ...nal dc power supply unit FT4222 The optional dc power supply unit is not required The DF interface harness is not required either FT4421 The optional dc power supply unit and the DF interface harness are installed on the machine at the factory 3 Duplex Installation FT4220 The optional dc power supply unit A525 is required The duplex harness is an accessory of the duplex unit FT4418 The optional dc...

Page 7: ...ries The light intensity reflected from the main reflector is stronger than that reflected from the sub reflector about 65 to 35 2 Dirty Background Copy To prevent the dirty backgrounds on copies caused by dust accumulated on optics parts the following items are modified 1 The toner shield glass is removed and a green color filter is installed on the lens unit 2 VL correction is added The exposure...

Page 8: ...als This change also helps to prevent dirty background copies caused by dust accumulated on the exposure glass 1st 2nd and 3rd mirrors 4 levels 2 Development Unit Set Sensor No Yes Toner Density Detection And Toner Supply 1 Black Toner End Detection The ID sensor is used for black toner end detection The black development unit for the Pigeon series cannot be used for the FT4418 series The toner en...

Page 9: ... paper size switches 2 2nd and 3rd Paper Feed Roller To achieve 22 CPM from the 3rd paper feed station the stop angle of the paper feed roller is changed To prevent the corner of the feed roller from hitting the paper stack when the paper tray is pulled out the corner of the paper feed roller is cut 3 Corner Separators on Paper Tray To reduce the occurrence of dog ear and double feed the shape of ...

Page 10: ...C power supply for FT4222 same as FT4418 A1115520 AC Drive Board 115 V A1115620 AC Drive Board 220 V AZ320069 Power Pack CC Grid Bias AX530017 Exposure Lamp 115 V AX530016 Exposure Lamp 220 V A1105235 Erase Lamp AX440066 Fusing Lamp 115 V AX440067 Fusing Lamp 220 V A1105640 Noise Filter Board for 220 V only AX200095 Registration Clutch Relay Roller Clutch A1105214 Scanner Motor A1105550 Operation ...

Page 11: ...ks A1116492 Operation Panel Ass y LT FT4222 GES A1106292 Operation Panel Ass y A4 FT4220 GES A1116292 Operation Panel Ass y A4 FT4222 GES A1106094 Operation Panel Ass y FT4220 Infotec A1116094 Operation Panel Ass y FT4222 Infotec 8 ...

Page 12: ...SECTION 1 OVERALL MACHINE INFORMATION ...

Page 13: ... lb Manual feed 52 to 157 g m2 14 to 42 lb Duplex 58 to 104 g m2 16 to 28 lb Reproduction Ratio 2 Enlargement and 3 Reduction A4 A3 version LT LDG version Enlargement 141 122 155 129 Full size 100 100 Reduction 93 82 71 93 74 65 Zoom From 50 to 200 in 1 steps Copying Speed FT4220 copier 20 copies minute A4 11 x 81 2 sideways 10 copies minute A3 11 x 17 FT4222 copier 22 copies minute A4 11 x 81 2 s...

Page 14: ... cartridge Developer Replenishment Black 1KG bag Yeild 60000 copies Color 1KG bag Yeild 30000 copies Copy Tray Capacity 250 sheets B4 81 2 x 14 and smaller 100 sheets A3 11 x 17 Power Source 110 V 60 Hz 15 A for Taiwan 115 V 60 Hz 15 A for North America 220 230 240 V 50 Hz 8 A for Europe 220 V 60 Hz 8 A for Middle East Refer to the serial number plate rating plate to determine the power source req...

Page 15: ...s than 58 dB less than 40 dB Weight FT4220 copier FT4222 copier Copier only 55 kg 121 3 lb 64 kg 141 1 lb Full system 78 kg 172 lb 83 5 kg 184 lb Optional Equipment and Machine Configuration Machine Code Configuration Optional dc power supply unit A525 Main frame Optional equipment Required Not required FT4220 copier A110 CS110 10 bin sorter A490 O DF57 Document feeder A318 O AD130 Duplex unit A49...

Page 16: ...2 COPY PROCESSES AROUND THE DRUM 4 DEVELOPMENT 5 PRE TRANSFER LAMP 6 IMAGE TRANSFER 7 PAPER 3 ERASE 2 EXPOSURE 1 DRUM CHARGE 9 QUENCHING 8 CLEANING SEPARATION PTL FT4220 4222 1 4 STM ...

Page 17: ...o remove all negative charge from the exposed areas of the drum This prevents the toner particles from being reattracted to the drum surface during paper separation and makes paper separation easier 6 IMAGE TRANSFER Paper is fed to the drum surface at the proper time so as to align the copy paper and the developed image on the drum surface Then a strong negative charge is applied to the back side ...

Page 18: ... Vsg detection Full erase Residual Voltage Vr Detection 500 bolts Fixed Same as image density control 0 volt Fixed Full erase All LEDs ON Between Copies Non image area 0 volt Fixed Exposure lamp turns off 200 volts Fixed Drum residual voltage Vr correction factor SP67 Full erase All LEDs ON NOTE a Boxed items can be adjusted by SP modes surrounded by square brackets b Data which determines the cor...

Page 19: ...upply Unit 15 Optics Cooling Fans 16 1st Feed Roller 17 Manual Feed Table 18 Pick up Roller 19 Separation Roller 20 1st Relay Rollers 21 2nd Relay Rollers FT4222 copier only 22 2nd Feed Rollers Semi circular 23 3rd Feed Rollers Semi circular FT4222 copier only 24 Registration Rollers 25 Pre transfer Lamp PTL 26 Transfer and Separation Corona Unit 27 Pick off Pawls 28 Cleaning Brush 29 Cleaning Bla...

Page 20: ...nt Section Drum Fusing and Exit Section BP1 Timing Belt Pulley G2 Relay Gear G18 Relay Gear G21 Cleaning Drive Cleaning Toner Supply CL Toner Supply Unit G17 Toner Supply CL Gear Development Unit Development CL Solenoid G28 Exit Roller Gear G16 Development CL Gear G29 Duplex Transport Gear Option G27 Relay Gear G26 Relay Gear BP2 Timing Belt Pulley G25 Hot Roller Gear A G22 Relay Gear G19 Drum Dri...

Page 21: ... Lift CL Gear Paper Lift CL G9 Paper Lift Gear G10 Sector Gear 2nd Feed Station Upper Relay Roller G13 Upper Relay Roller Gear 3rd Feed Station FT4222 copier only G14 Relay Gear BP4 Timing Belt Pulley G15 2nd Paper Feed CL Gear TB2 Timing Belt 2nd Paper Feed CL BP5 Timing Belt Pulley 3rd Paper Feed Roller 3rd Paper Feed CL G33 3rd Paper Feed CL Gear G32 Relay Gear G31 Lower Relay Roller Gear 2nd P...

Page 22: ...d 11 Manual Feed Table Switch 12 Color Switch 13 Paper Lift Clutch 14 1st Paper Feed Clutch Solenoid 15 Registration Clutch 16 Right Cover Switch 17 Relay Roller Clutch 18 1st Paper Size Switch 19 1st Paper End Sensor 20 Relay Sensor FT4222 Copier Only 21 Paper Lift Sensor 22 Registration Sensor 23 Total Counter 24 Pre transfer Lamp PTL 25 ID Sensor Board 26 Erase Lamp 27 Fusing Lamp 28 Quenching ...

Page 23: ...n DC Power Supply Board 46 Option DC Power Supply Board FT4220 copier only 47 Option Transformer FT4220 copier only 48 3rd Paper Size Switches FT4222 copier only 49 Noise Filter Board 220 230 240 V only 50 2nd Paper Size Switches 51 Main Transformer 52 3rd Paper End Sensor FT4222 copier only 53 AC Drive Board 54 3rd Paper Feed Clutch FT4222 copier only 55 2nd Paper End Sensor 56 2nd Paper Feed Clu...

Page 24: ... MC1 Toner Supply Clutch Drives the toner supply roller 6 Magnetic Spring Clutches MSC1 2nd Paper Feed Clutch Starts paper feed from the 2nd paper feed station 56 MSC2 Paper Lift Clutch Lifts paper to the appropriate feed station 13 MSC3 Registration Clutch Drives the registration rollers 15 MSC4 Relay Roller Clutch Drives the relay rollers for the 2nd or 3rd paper feed station 17 MSC5 3rd Paper F...

Page 25: ...ome Position Sensor Informs the CPU when the lens is at the home position full size position 2 S3 4th 5th Mirror Home Position Sensor Informs the CPU when the 4th 5th mirrors assembly is at the home position full size position 7 S4 Registration Sensor Detects misfeeds 22 S5 Exit Sensor Detects misfeeds 33 S6 1st Paper End Sensor Informs CPU when the cassette runs out of paper 19 S7 2nd Paper End S...

Page 26: ... 220 230 240 V only 49 PCB6 Option DC Power Supply Board Rectifies 26 and 10 Vac input and outputs dc voltages This board is required when the document feeder or and duplex unit is installed FT4220 copier only 46 Lamps L1 Exposure Lamp Applies high intensity light to the original for exposure 39 L2 Fusing Lamp Provides heat to the hot roller 27 L3 Quenching Lamp Neutralizes any charge remaining on...

Page 27: ...er Steps down the wall voltage to 26 31 Vac and 10 Vac 51 TR2 Option Transformer Steps down the wall voltage to 26 Vac and 10 Vac This transformer is required when the document feeder or and duplex unit is installed FT4220 copier only 47 Others TH Fusing Thermistor Monitors the fusing temperature 30 TF Fusing Thermofuse Provides back up overheat protection in the fusing unit 32 TS Optics Thermoswi...

Page 28: ...8 AC POWER AND DC POWER DISTRIBUTION FT4220 4222 1 16 STM ...

Page 29: ...main dc power supply board converts them to 24 volts and 30 volts The 5 volt and 24 volt currents are supplied to the copier main board and ac drive board The 30 volt current is supplied to the ac drive board The zero cross signal is supplied to the copier main board through the ac drive board The copier main board supplies dc power to all copier dc components except the scanner motor and lens mot...

Page 30: ...ex unit The ac drive board supplies 24 volts to the scanner motor and lens motor The 5 volt current is dc power for the ICs on the scanner motor drive circuit The main board sends the control signals to the scanner motor and lens motor through the ac drive board When the main board receives power it activates the power relay RA401 which then supplies ac power to the fusing lamp drive circuit and t...

Page 31: ...SECTION 2 DETAILED SECTION DESCRIPTIONS ...

Page 32: ...he conductivity of a photoconductor 3 Dissipating an amount of charge in direct proportion to the intensity of the light That is where stronger light is directed to the photoconductor surface a smaller voltage remains on the OPC 4 Being less sensitive to changes in temperature when compared to selenium F type drums 5 During the drum s life drum residual voltage gradually increases and the photocon...

Page 33: ... the drum is replaced and or the pick off pawls and or the ID sensor are cleaned the drum unit must be removed from the copier as a unit The drum is driven by the main motor E through the main motor gear F a relay gear and the drum drive gear G The pick off pawls are always in contact with the drum surface The ID sensor is electrically connected to the ID sensor connector H B C A H G E C D F FT422...

Page 34: ...corona unit This prevents uneven build up of negative ions that can cause uneven image density The exhaust blower runs at half speed when in the stand by condition and runs at full speed while copying The exhaust blower has an ozone filter active carbons which adsorbs ozone O3 generated by the corona charge The ozone filter decreases in efficiency over time as it adsorbs ozone The ozone filter sho...

Page 35: ...up against the rear block C This moves the pads against the corona wire see illustration If the charge unit is not fully extended the pads do not touch the corona wire The pads move away from the wire when the charge unit is fully inserted and the cleaning bracket is pushed against the front block D After copier installation the key operator should be instructed how to use this mechanism when copi...

Page 36: ...harge voltage to ensure that the charge does not fluctuate and an even charge is applied to the drum surface The grid trigger pulse applied to CN1 5 is a pulse width modulated signal PWM signal This signal is not only a trigger signal it also changes the voltage level of the grid As the width of the pulse applied increases the voltage of the grid also increases VA 24 VC 5 GND 0 Main Board PCB 1 CN...

Page 37: ...veloped on the drum every 1000 copies and its reflectivity is detected by the ID sensor to measure the residual voltage This is called residual voltage detection If the reflectivity is low the residual voltage will be high When the Vr pattern is developed all blocks of the erase lamp turn on the grid voltage is 500 volts and the development bias voltage is 0 volt See page 2 8 for standard image de...

Page 38: ...rn developed on the drum becomes lighter after 2 000 copies causing higher toner concentration in the developer Vp correction is made to prevent this phenomenon and functions as follows The CPU keeps track of the total number of copies made with the drum The grid voltage for the toner density detection increases by 20 volts after 2 000 copies see page 2 8 The drum counter is displayed by SP69 The ...

Page 39: ...ge Density Control Grid Voltage Standard image density grid voltage 920 volts SP60 5 Vr correction factor Vr Correction Factor L Change of grid voltage 100 to 89 88 to 76 75 to 62 61 to 45 44 to 0 0 volt 40 volts 80 volts 120 volts 160 volts L Vrp Vsg x 100 Vr correction ratio Vrp ID sensor output for Vr correction pattern Vsg ID sensor output for bare drum NOTE The grid voltage for between copies...

Page 40: ...atios and full size It also has a zoom function The operator can change the reproduction ratio in one percent steps from 50 to 200 Stepper motors are used to change the positions of the lens and mirrors Separate motors are used because the wide range of reproduction ratios makes it mechanically difficult for one motor to position both the lens and mirrors A stepper motor is also used to drive the ...

Page 41: ...or is connected to the scanner drive wire by the wire clamps E The second scanner F which consists of the second and third mirrors is connected to the scanner drive wire by movable pulleys the second scanner pulley G The pulley moves the second scanner at half the velocity of the first scanner This is to maintain the focal distance between the original and the lens during scanning This relationshi...

Page 42: ...of the lens is detected by the home position sensor D The main board keeps track of the lens position based on the number of pulses sent to the lens motor 3 3 2 Shading Mechanism The shading plates E are installed on the lens housing F and are slid open and shut by the groove cams G When the lens moves in the reduction direction the groove cams move the shading plates closer together The plate blo...

Page 43: ...duction side the sensor registers the home position This occurs when the actuator plate C enters the lens home position sensor A small vibration can be observed when the lens moves through home position from the reduction side to the enlargement side because the lens is going in the wrong direction to register the home position The lens overshoots the home position by only one pulse before going b...

Page 44: ...o to provide the proper optical distance between the lens and drum surface 3 4 2 Positioning The positioning mechanism is similar to that of lens positioning as shown in the above positioning chart The scanner always stops while moving from right to left as viewed from the front B A Home Position 100 100 141 155 141 155 71 65 71 65 93 93 71 65 71 65 141 155 141 155 122 129 122 129 100 100 71 65 71...

Page 45: ... CPU checks the data twice in platen mode for determining the original size for APS or ARE modes The first check is done when the platen cover position sensor D or DF position sensor E is actuated At this time the platen cover or DF is lowered to about 10 cm 4 above the exposure glass Only the sensors underneath the original receive the reflected light and output a low signal The other sensors out...

Page 46: ...x 14 0 0 0 0 0 1 81 2 x 14 1 0 0 0 0 1 F4 1 0 0 0 1 1 A4 lengthwise 81 2 x 11 1 0 0 0 1 1 B5 lengthwise 8 x 10 1 0 0 1 1 1 A5 lengthwise or smaller 51 2 x 81 2 or smaller 1 1 1 1 1 1 A4 sideways 11 x 81 2 0 0 0 1 1 1 B5 sideways 81 2 x 51 2 0 0 1 1 1 1 A5 sideways 1 0 1 1 1 1 0 Original exists 1 No original NOTE 1 The inch version machine does not have S16 3 2 When the original size is A5 lengthwi...

Page 47: ...B will vary depending on the selected reproduction ratio The lengths A and B in each reproduction ratio are calculated as follows A 10 mm Reproduction Ratio x 100 B 50 mm Reproduction Ratio x 100 The photosensor circuit converts the light intensity to a voltage The detected voltage is amplified and sent to the main PCB The CPU stores the voltage of each sampled point in RAM It then computes the im...

Page 48: ... at set intervals which can be changed by SP61 see page 2 20 3 7 2 Drum Wear Correction During the drum s life the photoconductive surface of the drum becomes worn by contact with the cleaning brush This affects the drop of the drum photosensitivity This may cause dirty backgrounds on copies To compensate for this phenomenon drum wear correction is made as follows The CPU keeps track of the drum r...

Page 49: ... 2 108 0 128 73 0 135 5 103 58 8 109 1 129 73 6 136 6 104 59 3 110 1 130 74 2 137 6 105 59 9 111 2 131 74 7 138 7 106 60 5 112 2 132 75 3 139 8 107 61 1 113 3 133 75 9 140 8 108 61 6 114 4 134 76 5 141 9 109 62 2 115 4 135 77 0 142 9 110 62 8 116 5 136 77 6 144 0 111 63 3 117 5 137 78 2 145 1 112 63 9 118 6 138 78 7 146 1 113 64 5 119 6 139 79 3 147 2 114 65 0 120 7 140 79 9 148 2 115 65 6 121 8 1...

Page 50: ...Vo of manual image density mode A value from 100 to 150 can be selected 3 8 2 Base Lamp Voltage Factor in Auto Image Density Mode In auto ID mode the CPU selects the level 4 Vo exposure lamp data regardless of the input from the auto image density sensor When the auto image density level is set to lighter in SP34 the exposure lamp data changes to that of manual ID level 5 as shown below When the a...

Page 51: ...f the machine on time This interval can be changed by SP61 as shown in the above table The total increase for VL correction cannot exceed 20 When cleaning the optics parts SP94 should be performed to clear VL correction VL correction clear SP94 SP data SP94 VL correction 0 Not clear 1 Clear NOTE When 1 is input in SP94 the machine on time SP57 data is cleared Perform SP94 whenever optics parts are...

Page 52: ...at set interval of drum rotation time as shown in the above table The drum rotation time is displayed by SP58 This time must be reset by SP66 when the drum is replaced with a new one 3 8 5 Reproduction Ratio Correction Factor Reproduction ratio Change of exposure lamp data 50 to 61 2 62 to 139 0 140 to 159 2 160 to 179 6 180 to 200 10 The exposure lamp data increases depending on the selected repr...

Page 53: ...at more ac power is applied to the exposure lamp This feedback control is performed instantly so the lamp voltage is always stable even under fluctuating ac power conditions The voltage applied to the exposure lamp can be changed with SP48 Light Intensity Adjustment The ADS voltage adjustment SP56 must be done whenever the light intensity adjustment is done Main Board PCB1 AC Drive Board PCB2 Feed...

Page 54: ...e erase The erase lamp A consists of a line of LEDs 43 LEDs extending across the full width of the drum B The erase lamp has four functions lead edge erase side erase trail edge erase and editing mode erase erase edge or and erase center Trail edge erase begins after the trailing edge of the copy paper therefore the trailing edge of the copy will not be erased LE EL SE ES Lo Lc A B STM 2 23 FT4220...

Page 55: ... side erase starts The width of the lead edge erase margin can be adjusted using SP41 During the toner density detection cycle once every ten copy cycles a block of erase lamps labeled o above turns off long enough for the sensor pattern to be developed The entire line of LEDs turns on when the residual voltage on the OPC drum is being detected Vr detection 4 1 2 Side Erase Based on the combinatio...

Page 56: ...ge of the latent image has passed Therefore a trailing erase margin cannot be observed on the copy The LEDs stay on to erase the leading edge of the latent image in the next copy cycle After the final copy the erase lamps turn off at the same time as the main motor 4 1 4 Editing Mode Erase When copying a thick book original the binding margin at the center and the edges may appear dirty on copies ...

Page 57: ...he right table show the margin of the side edges for the various paper sizes in the full size copy mode SP data SP26 Margin of the center 0 20 mm 1 10 mm 2 15 mm 3 25 mm Factory setting SP26 0 SP data SP18 Margin of the lead and trail edges 0 10 mm 1 5 mm 2 15 mm 3 20 mm Factory setting SP18 0 Paper Size Margin of side edges SP13 0 SP13 1 A3 A4 13 mm 5 5 mm 11 x 17 11 x 8 5 11 x 15 11 mm 3 5 mm B4...

Page 58: ...n the developer brush contacts the drum surface the negatively charged areas of the drum surface attract and hold the positively charged toner In this way the latent image is developed The development roller is given a negative bias to prevent toner from being attracted to non image areas on the drum that may have residual negative charge The bias also controls image density After turning about 10...

Page 59: ...ller gear E through the idle gear F A gear G on the front end of the paddle roller shaft drives the auger gear H and the agitator gear I The paddle roller shaft has a knob J on the front end so that it can be turned manually to exchange developer The knob has a one way clutch inside The one way clutch prevents the development roller from turning in the wrong direction The development clutch soleno...

Page 60: ...velopment roller B forms the magnetic brush and develops the latent image on the drum The part that is trimmed off by the doctor blade goes to the backspill plate C As the developer slides down the backspill plate to the agitator D the mixing vanes E move it slightly toward the rear of the unit Part of the developer falls into the auger inlet and is transported to the front of the unit by the auge...

Page 61: ...e automatic ID mode is used The development bias applied to the development roller sleeve has the following three factors Development bias voltage Base bias voltage factor Manual or automatic image density control Base bias voltage adjustment factor Vr correction factor The base bias voltage for non image areas between copies is 200 volts The above correction factors are also applied 5 4 1 Base Bi...

Page 62: ...oltage corresponds to the maximum reflectivity of the original The CPU then determines the proper base bias level with reference to the peak hold voltage The following table gives the base bias voltages at each ADS output level When the automatic density level is set to darker by SP34 the base bias voltage shifts 40 volts as shown in the following table K Base bias voltage Normal or lighter SP34 0...

Page 63: ... 0 81 0 83 TL5 0 29 0 29 0 30 0 31 0 33 0 33 0 34 0 35 0 36 0 36 0 37 0 38 0 37 13 14 15 16 17 18 19 20 21 22 23 24 TL1 1 11 1 11 1 11 1 12 1 13 1 13 1 13 1 13 1 13 1 13 1 13 1 13 TL2 1 05 1 06 1 07 1 08 1 10 1 11 1 13 1 13 1 13 1 13 1 13 1 13 TL3 0 98 0 99 1 02 1 05 1 07 1 09 1 12 1 13 1 13 1 13 1 13 1 13 TL4 0 85 0 86 0 86 0 88 0 91 0 93 0 95 0 98 0 99 1 02 1 05 1 08 TL5 0 38 0 39 0 42 0 43 0 44...

Page 64: ...the bias voltage changes depending on the Vr correction ratio L Vr Correction Factor L Change of bias voltage 100 to 89 88 to 76 75 to 62 61 to 45 44 to 0 0 volts 40 volts 80 volts 120 volts 160 volts NOTE L Vrp Vsg x 100 Vr correction ratio Vrp ID sensor output for Vr correction pattern Vsg ID sensor output for bare drum When the Vr correction is made every 1 000 copies all blocks of erase lamps ...

Page 65: ... The bias trigger pulse applied to CN1 4 is a pulse width modulated signal PWM signal This signal is also used to change the voltage level of the development roller As the width of the trigger pulses increase the voltage of the development roller also increases The CPU monitors the development bias voltage at CN1 6 and controls the width of the bias trigger pulses based on this feedback VA 24 VC 5...

Page 66: ...hen a color development unit is installed in the copier the color switch A is activated by screw B at the rear side of the development unit The color switch has two microswitches SW6 1 C and 6 2 D inside The CPU receives a LOW signal from the microswitch activated by the screw and determines which color unit has been installed A D C B C D A STM 2 35 FT4220 4222 ...

Page 67: ...the reflected light is too strong indicating a too low toner density condition toner is added to the development unit The toner is not added all at once The CPU energizes the toner supply clutch for the proper amount of time to add a selected amount of toner over the next 10 cycles When a color development unit is used the CPU automatically selects fixed toner supply mode 1 2 3 4 5 6 7 8 9 10 11 1...

Page 68: ...ensity is too low the CPU activates the toner supply clutch to add toner over the next 10 copy cycles The amount of toner added depends on the value of Vsp the selected toner supply ratio SP31 ID sensor data and the paper size in use See page 2 43 for more information When the data of SP35 is set to 1 factory setting 0 the CPU changes the interval of the ID check from every 10 copies to every 5 co...

Page 69: ... unit is installed the fixed supply mode is selected In this case a fixed amount of toner is added every copy cycle depending on the selected toner supply ratio SP32 black toner SP70 color toner the paper size in use and the color data See page 2 45 for more information STM 2 38 FT4220 4222 ...

Page 70: ...ata The CPU calculates the threshold level for toner supply when the color developer initial setting SP10 procedure is completed This level is determined by calculating the average of Vsp Vsg x 100 Since the fixed supply mode is selected when in color toner mode it is necessary to inhibit toner supply if the toner density becomes high to prevent over toning The CPU checks Vsp once every 5 copy cyc...

Page 71: ...d correction factor Black toner only The development voltage for the Vr correction is 0 volt 6 6 1 Toner Density Adjustment Factor Toner density SP data SP33 and SP75 Development bias voltage Black toner Red toner Green toner Blue toner Normal 0 280 volts 240 volts 320 volts 300 volts Low 1 240 volts 200 volts 280 volts 260 volts High 2 300 volts 260 volts 340 volts 320 volts Higher 3 320 volts 28...

Page 72: ...nitored by SP64 The CPU has a software counter no SP mode display to count the number of copies made with the developer The counter resets to 0 when SP65 is performed Vd correction is made based on the results of the calculation and the data of the software counter as shown in the following table SP data SP64 Vsp Vsg x 100 Change of development bias voltage 0 to 499 copies More than 500 copies 0 1...

Page 73: ...toner supply drive gear The toner supply drive gear turns the toner supply roller gear E Toner catches in the grooves on the toner supply roller F Then as the grooves turn past the pin hole plate G the toner drops into the development unit through the pin holes The toner agitator H mechanism which is contained in the toner cartridge prevents toner from blocking The toner agitator gear I turns when...

Page 74: ...ner supplied depends on the ID sensor data the detect toner supply ratio data and the paper size The toner supply clutch on time in each copy cycle is calculated as follows Toner Supply Clutch ON Time I x T x P pulses Where I ID Sensor Data T Detect Toner Supply Ratio Data P Paper Size Data For example Vsp 0 65 volts which means the toner supply level is 2 and the ID sensor 29 The data of SP31 is ...

Page 75: ...See note below 4 30 118 Toner end level 62 5 to more than 100 2 5 to 5 0 volts Fixed supply mode N A Abnormal condition NOTE If this condition is detected three times consecutively the toner supply ratio rises to 60 ID Sensor Data 236 which is double that at toner supply level 4 Detect Toner Supply Ratio Data SP31 SP data SP31 Toner supply ratio Toner supply ratio data 0 15 2 1 7 1 2 30 4 3 60 8 P...

Page 76: ...llows Toner Supply Clutch ON Time T x P x 2 x C pulses Where T Fixed Toner Supply Ratio Data P Paper Size Data C Color Data For example The data of SP32 is set to 0 The toner supply ratio is 7 0 and the toner supply data 2 Paper size is A4 The paper size data 29 Black toner is used The color data 1 Toner Supply Clutch ON Time T x P x 2 x C 2 x 29 x 2 x 1 116 pulses 464 m sec 1 pulse 4 0 m sec FT42...

Page 77: ...Data Color Toner SP70 SP data SP70 Toner supply ratio Toner supply ratio data 0 14 0 2 1 7 0 1 2 21 0 3 3 28 0 4 Paper Size Data Paper size Paper size data A3 58 B4 43 A4 29 B5 23 A5 15 B6 11 11 x 17 55 81 2 x 14 37 81 2 x 11 27 51 2 x 81 2 14 Universal 29 Paper size not detected 0 Color Data Color Color data Black 1 Red 2 Blue or Green 1 2 STM 2 46 FT4220 4222 ...

Page 78: ...n and starts blinking the Add Toner indicators 6 9 2 Toner End Condition After the Add Toner indicator starts blinking Near Toner End Condition the operator can make 50 copies If the toner cartridge is not replaced within 50 copies copying is inhibited and a toner end condition is determined In this condition the Add Toner indicator lights Example Copy number Toner density detection cycle Vsp Vsg ...

Page 79: ...n the main motor de energizes the development clutch solenoid and turns on the toner supply clutch for 35 seconds to supply toner to the empty toner supply unit from the toner cartridge The CPU checks Vsg and Vsp four times at the end of this period to clear the toner end condition When the average of Vsp Vsg x 100 becomes less than 22 5 or the average of Vsp Vsg x 100 becomes less than 80 of the ...

Page 80: ...e same shaft as the toner end arm When there is sufficient toner in the hopper the toner end plate is prevented from moving by the toner Therefore even when the toner end lever drops to the lowest position on the cam releasing the toner end arm the toner end arm does not move and the toner end sensor F is not activated When there is insufficient toner in the hopper the toner end plate can move Whe...

Page 81: ...turns on the main motor de energizes the development clutch solenoid and turns on the toner supply clutch for approximately 3 seconds to supply toner to the empty toner supply unit from the toner cartridge A toner end detection is also done during this 3 second period The CPU performs this operation a maximum of 3 times 9 seconds to clear the toner end condition 6 11 COLOR TONER SUPPLY UNIT INITIA...

Page 82: ... to the negatively charged drum during the paper separation process It also makes image transfer and paper separation easier 7 2 IMAGE TRANSFER A high negative voltage 4 8 kilovolts is applied to the transfer corona wire C and the corona wire generates negative ions These negative ions are applied to the copy paper and the negative charge attracts the positively charged toner away from the drum an...

Page 83: ...f the paper causes it to separate from the drum The negative charge on the paper from the transfer corona is not completely discharged until the paper is far enough from the drum that the toner will not be reattracted to the drum The two pick off pawls E ensure that thin low stiffness paper and upward curled paper separate completely The spurs F prevents the unfused toner on the paper from being s...

Page 84: ...gger is only used for the second side copies in duplex copy mode This shifts the corona current to increase transfer efficiency The separation corona circuit in the TC SC power pack has a current leak detection circuit for safety When this circuit detects that more than 2 milliampere is supplied to the separation corona the separation corona turns off immediately When the main switch is turned off...

Page 85: ...d on the blade The cleaning blade removes the remaining toner The falling toner catches in the fibers of the cleaning brush and is carried inside the cleaning unit The toner collection roller D carries the used toner to the used toner tank The light of the quenching lamp E neutralizes any charge remaining on the drum in preparation for the next copy cycle The cleaning blade releases when the relea...

Page 86: ...ear B and the cleaning drive gear C The gear D driven by the cleaning drive gear passes the rotation to the toner collection roller gear E and to the cleaning brush gear F through the idle gears G The cleaning blade H is mounted in the center of the blade and is tilted to apply even pressure H G D C B E A F FT4220 4222 2 55 STM ...

Page 87: ...p a movable plate A mounted in the top of the used toner tank As this plate moves up it raises the toner overflow actuator B When the actuator moves into the toner overflow sensor C the CPU starts to blink E70 on the operation panel After the E70 starts to blink 250 copies can be made Then after 250 copies the E70 stops blinking stays on and copying is inhibited C B A STM 2 56 FT4220 4222 ...

Page 88: ...tion for the next copy cycle light from the quenching lamp QL A neutralizes any charge remaining on the drum B The neon lamp is used for quenching and it is turned on whenever the main motor rotates A B FT4220 4222 2 57 STM ...

Page 89: ...eed system Rotation of the pick up roller D drives the top sheet of paper from the cassette to the feed and the reverse rollers The feed E and reverse F rollers then take over the paper drive If more than one sheet is fed by the pick up roller the reverse roller rotates in the opposite direction and prevents all but the top sheet from passing through to the registration rollers G The second and th...

Page 90: ...e pick up roller lifts off the paper stack so that it does not interfere with the operation of the feed and reverse rollers The feed and reverse rollers then take over the paper feed process 10 2 2 Feed and Reverse Rollers There is a one way bearing inside the feed roller so it can turn only in one direction The reverse roller is driven in the opposite direction to the feed roller The reverse roll...

Page 91: ... between the feed roller B and the paper F2 is greater then F1 So the reverse roller turns counterclockwise If two or more sheets are fed between the rollers the forward force on the second sheet F3 becomes less than F1 because the coefficient of friction between the two sheets is small So the reverse roller starts turning clockwise and drives the second sheet back to the cassette B A B A F2 F2 F1...

Page 92: ...oves down and then the paper lift gear D engages with the sector gear E Simultaneously the paper size actuator F actuates the paper size switch G Under the following conditions the CPU checks the paper lift sensor H to see if the paper is at the feed position 1 When the Start key is pressed 2 When the warm up condition changes to the ready condition 3 When the manual feed table is closed H I K J G...

Page 93: ...g section for details As paper is fed into the copier the level of paper stack gets lower If the level becomes too low the paper lift sensor is actuated and the CPU energizes the paper lift clutch until the top sheet raises the feeler to de actuate the paper lift sensor again This ensures that the paper is always at the correct feed height 10 3 2 Paper End Detection When the cassette runs out of p...

Page 94: ...aper the paper end feeler G drops through a slot in the tray bottom plate The paper end actuator H which is on the same shaft as the paper end feeler pivots into the paper end sensor I The paper end sensor sends a HIGH signal to the main board and then the Add Paper indicator turns on The Wait indicator keeps turning on and the machine stops after the copy cycle is finished When the paper tray is ...

Page 95: ...e microswitches SW3 1 through 3 5 inside The paper size switch is actuated by an actuator plate B on the rear of the cassette Each paper size has its own unique combination of notches in the plate The CPU receives a LOW signal from the microswitches activated by the actuator and determines which cassette was inserted B A 1 2 3 4 5 SW3 STM 2 64 FT4220 4222 ...

Page 96: ... 0 0 0 1 1 0 0 1 1 1 0 0 0 0 0 1 0 1 0 0 1 0 0 1 0 1 0 1 1 0 1 0 1 0 0 1 1 0 0 1 1 0 1 0 1 1 0 A3 B4 A4 A4 A5 A5 F 11 x 17 11 x 81 2 11 x 15 10 x 14 81 2 x 14 81 2 x 13 81 2 x 11 81 2 x 51 2 81 4 x 13 14 8 x 101 2 8 x 10 51 2 x 81 2 0 0 0 0 1 1 0 0 0 1 0 1 0 0 1 1 1 0 0 1 0 0 1 0 1 1 0 1 0 1 0 1 1 0 1 1 1 1 0 1 0 0 0 1 1 0 1 0 1 1 1 1 0 1 1 0 0 1 1 1 11 x 17 81 2 x 11 81 2 x 14 81 2 x 11 51 2 x 81...

Page 97: ...switch has two microswitches The paper size switches are actuated by a paper size detection block C on the rear of the paper tray Each paper size has its own unique combination of holes in the block The CPU receives a LOW signal from the microswitches activated by the block and determines which paper size is used in the paper tray C A SW4 SW9 B SW5 SW10 2 1 1 2 STM 2 66 FT4220 4222 ...

Page 98: ...1 0 1 0 0 0 1 1 0 1 1 0 1 1 0 0 A3 B4 A4 A4 A5 F 11 x 17 11 x 81 2 81 2 x 14 81 2 x 11 1 1 0 1 0 1 1 1 1 0 1 1 0 0 0 1 11 x 17 81 2 x 11 81 2 x 14 81 2 x 11 0 0 0 0 Duplex Unit 0 Actuated Low 1 Not Actuated High NOTE 1 SP96 special paper size setting sets the appropriate paper size for special paper when setting the mark on the paper size detection block 2 Duplex modes cannot be selected FT4220 42...

Page 99: ...er feed clutch solenoid D The pick up roller E is normally in contact with the paper stack When the leading edge of the paper passes between the feed roller F and the reverse roller G the pick up roller is then lifted up by the pick up roller release solenoid H After the trailing edge of the paper passes under the pick up roller the pick up roller release solenoid is de energized and the pick up r...

Page 100: ...gear F only when the relay roller clutch is on Both the relay roller clutch and the 2nd paper feed clutch turn on at the same time to start paper feed The 2nd feed clutch is energized for 500 milliseconds to transfer drive to the 2nd feed roller shaft and turns the 2nd feed rollers G The 2nd feed rollers stop turning when the 2nd feed clutch gear completes one rotation The relay roller clutch stay...

Page 101: ... rotation to the 3rd feed clutch gear F through the relay gear G Both the relay roller clutch and the 3rd paper feed clutch turns on at the same time to start paper feed The 3rd feed clutch is energized for 500 milliseconds to transfer drive to the 3rd feed roller shaft and turns the 3rd feed rollers H The 3rd feed rollers stop turning when the 3rd feed clutch gear completes one rotation The relay...

Page 102: ...ring A The spring grips the input hub B loosely and grips the output hub C tightly It will slip if the resistance to rotation is too great The hubs and spring are precisely machined and the output hub and spring slip when a single sheet of paper feeds between the feed roller and reverse roller B A C E D FT4220 4222 2 71 STM ...

Page 103: ...up clutch unit mechanically to drop down the cassette bottom plate At the same time the pick up roller release solenoid turns on to release the pick up roller and the paper end feeler D drops down into a slot in the manual feed table The manual feed table switch sends a LOW signal to the main board so that the Manual Feed indicator turns on and the pick up roller is lifted up When paper is loaded ...

Page 104: ...tion rollers G controls the paper feed stop timing The 1st paper feed clutch stays on for 120 milliseconds and the relay roller clutch 2nd and 3rd paper feed stations stays on 114 milliseconds after the leading edge of paper actuates the registration sensor At the end of the period the CPU turns off the 1st paper feed clutch or the relay roller clutch This delay allows time for the paper to press ...

Page 105: ...4ms 114ms 2010 2010 2010 2000 2000 2000 100 J1 J1 J1 JR JR JR JR 1587 FT4220 copier 2500 1750 3250 1750 FT4222 copier 2445 1750 1557 FT4222 copier 2252 1557 2947 1557 3642 1557 1433 FT4220 copier 2183 1433 2933 1433 3683 1433 2015 1320 2710 1320 3405 1320 Timing Pulse 4 msec pulse Start Key Main Motor 1st Feed Station 1st Feed Clutch Solenoid Pick up Roller Release Solenoid Registration Sensor Reg...

Page 106: ...e CPU performs the following misfeed detection J1 Checks whether the registration sensor is actuated within 10 pulses 40 milliseconds after the registration clutch turns on J2 Checks whether the exit sensor is actuated within 700 pulses 2 8 seconds after the registration clutch turns on J3 Checks whether the copy paper has passed through the exit sensor 2 75 A4 sideways or 2 80 Letter sideways sec...

Page 107: ...roller surface temperature through a thermistor D which is in contact with the hot roller s surface A thermofuse E protects the fusing unit from overheating The hot roller strippers F separate the copy paper from the hot roller and direct it to the exit rollers G The exit sensor H monitors the progress of the copy paper through the fusing unit and acts as a misfeed detector while the exit rollers ...

Page 108: ...te freely so that misfed paper can be easily removed When the front cover and or the exit cover is opened the actuator plate C pulls release wire D and the fusing unit drive gear is disengaged The actuator plate also releases the cover safety switch E removing all power from the copier and the optional peripherals A A B D D D C C C The front cover is opened The exit cover is opened The front cover...

Page 109: ...rm up the thermistor s temperature lags behind the real hot roller s temperature As a result when the thermistor senses the ready temperature the hot roller is already at or near the operating temperature At this time the Ready indicator turns on After that the trigger pulse is turned on constantly when thermistor detects a temperature less than 185 C and is turned off when the thermistor detects ...

Page 110: ...ctory Setting SP86 2 NOTE The energy saving ratio in the above table are standard values measured in laboratory tests under controlled conditions The actual ratios will vary depending on environmental conditions copy modes power supply conditions and measurement instruments The greater the energy saving ratio is the longer the waiting time until the copier returns to the ready condition The copier...

Page 111: ... as the zero cross signal B to the ac drive board This trigger pulse allows maximum ac power to be applied to the fusing lamp When the operating temperature is reached the CPU stops outputting the trigger pulse trigger goes HIGH and the fusing lamp turns off Trigger Pulse R263 R262 R270 5V IC103 24V 5V CN122 18 CN122 4 CN122 6 CN122 2 CN435 7 CN435 3 CN435 5 CN137 14 R124 Zero Cross CPU TP103 TH C...

Page 112: ...HIGH when the main board receives the zero cross signal The amount of time that power is applied to the fusing lamp D depends on the temperature of the hot roller The trigger pulse LOW part is wider C1 when the hot roller temperature is lower and it is narrower C2 when the hot roller is near the operating temperature AC Power Zero Cross Trigger Low Temp Fusing Lamp Power Trigger High Temp Fusing L...

Page 113: ...es 240 C the resistance of the thermistor becomes too low At that time pin 7 of IC103 becomes HIGH turning off Q101 and stopping PC402 At the same time E53 lights on the operation panel and the power relay RA401 turns off Even if the thermistor overheat protection fails a thermofuse is installed in series with the fusing lamp If the thermofuse temperature reaches 169 C the thermofuse opens removin...

Page 114: ...SECTION 3 DOCUMENT FEEDER ...

Page 115: ... 17 Minimum B6 lengthwise 51 2 x 81 2 lengthwise Weight 53 to 105 g m2 14 to 28 lb Original Feed Automatic feed ADF mode Manual feed one by one SADF mode Original Table Capacity 35 sheets 64 g m2 17 lb Original Set Face up First sheet on top Original Transport One flat belt Copy Speed 20 copies minute for A4 81 2 x 11 sideways Power Consumption 20 W Dimensions W x D x H 670 x 460 x 103 mm 26 4 x 1...

Page 116: ...rical Components 1 Original Set Sensor 9 DF Main Board 2 Registration Sensor 10 Feed out Motor 3 Pulse Generator Sensor 11 Inverter Solenoid 4 Original Width Sensor 12 Feed out Sensor 5 Pick up Solenoid 13 Original Select Switch 6 Belt Drive Motor 14 Feed in Solenoid 7 Indicator Panel 15 DF Position Sensor 8 Lift Switch FT4222 copier only 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 9 10 13 14 12 8 11 15 FT...

Page 117: ...ms the CPU when the DF is lifted and also serves as the jam reset switch for the DF 8 SW2 Original Select Switch Selects thick original mode or thin original mode 13 Sensors S1 Original Set Sensor Informs copier CPU that originals have been placed and causes the Insert Original indicator to go out 1 S2 Registration Sensor Sets original stop timing and measures original length 2 S3 Original Width S...

Page 118: ...tly The belt drive motor and the inverter motor are controlled by the DF CPU through their respective driver ICs The exchanged signals are shown in the tables on the next page DF Main Board PCB1 RXD TXD Copier Main Board PCB1 CPU ROM Driver IC Driver IC TXD RXD Feed out Motor Belt Drive Motor Solenoids Indicators Sensors Switches FT4220 4222 3 4 STM ...

Page 119: ...eed occurs in the DF 2 Copier DF No Signal Name Definition 1 Feed in Requests the DF to feed in the original 2 Feed out Requests the DF to feed out the original 3 Invert Original Requests the DF to invert the original 4 Auto Feed Shifts the DF to the auto feed mode 5 Original Stay Attempt to use DF but the original from the previous copy run remains on the exposure glass STM 3 5 FT4220 4222 ...

Page 120: ...F registration sensor The belt drive motor turns off shortly after the original s trailing edge passes the DF registration sensor While feeding the original the DF registration sensor and the paper width sensor check the original size Just when the original trailing edge has passed the DF registration sensor the DF CPU sends the copy start signal to the copier When the scanner reaches the return p...

Page 121: ...lt drive motor reverses and the original is fed towards the left scale and is aligned against the scale The DF CPU sends the copy start signal a short time after the original trailing edge has passed the feed out sensor When the scanner reaches the return position the copier CPU sends the invert original signal to the DF CPU in order to make a copy of the front side The original is inverted in the...

Page 122: ...n dc power supply board The option dc power supply board then converts the 10 volts ac input to 5 volts dc and the 26 volts ac input to 24 volts Then those two dc voltages are supplied to the DF main board The regulator IC on the DF main board further steps down the 24 volts to 12 volts 115Vac 26Vac 10Vac 220 230 240Vac 5V 12V 24V 24V VA 5V VC Regulator IC DF Main Board PCB1 AC Drive Board PCB2 Op...

Page 123: ...supply board then converts the 10 volts ac input to 5 volts dc and the 31 volts ac input to 24 volts Then those two dc voltages are supplied to the DF main board through the copier main board The regulator IC on the DF main board further steps down the 24 volts to 12 volts 115Vac 220 230 240Vac AC Drive Board PCB2 31Vac 10Vac 5V 12V 24V 24V VA 5V VC Regulator IC DF Main Board PCB1 Main Transformer...

Page 124: ...r to move out of the sensor The DF then sends the original set signal to the copier CPU to inform it that the DF will be used When the Start key is pressed the pick up solenoid B is energized The original stack is then pressed between the pick up lever C and pick up roller D The rotation of the pick up roller advances the bottom original B C A D A FT4220 4222 3 10 STM ...

Page 125: ...nal feed starts when the feed roller starts turning and advances the bottom original of the stack The feed roller moves the original past the friction belt because the driving force of the feed roller is greater than the resistance of the friction belt The friction belt prevents multiple feeds because the resistance of the friction belt is greater than the friction between original sheets B A B C ...

Page 126: ...ed in solenoids are energized 100 milliseconds after the Start key of the copier is pressed Then 100 milliseconds after the solenoids are energized the belt drive motor starts turning The pulse generator disc G always turns when the belt drive motor is on Slightly after the original trailing edge passes the registration sensor the relay rollers and the transport belt stop turning F E C D B A G FT4...

Page 127: ...ion sensor Exact timing depends on registration adjustment Thin original mode is selected at the factory 2 Thick Original Mode When thick original mode is selected the belt drive motor remains energized for an additional 30 encoder pulses as compared to thin original mode Then the belt drive motor pauses and reverses for 21 pulses This forces the original against the left scale and thus aligns the...

Page 128: ...original width sensor A registration sensor and pulse generator sensor B The original s length is calculated by counting the number of pulses from the pulse generator while the registration sensor is on Original size detection is necessary for the feed in feed out timing of the DF B A FT4220 4222 3 14 STM ...

Page 129: ...sided original is fed into the feed in unit passing over the DF registration sensor A The feed out motor B and the inverter solenoid C turn on 100 milliseconds after the original trailing edge passes the registration sensor When the inverter solenoid turns on the inverter pawls D rotate counterclockwise D C B E D A 1 STM 3 15 FT4220 4222 ...

Page 130: ...e of the original against the left scale When the original leading edge reaches the left scale the belt drive motor stops At the same time the feed out motor and the inverter solenoid turn off 4 After the reverse side of the original is exposed the belt drive motor the feed out motor and the inverter solenoid turn on and the original is fed into the inverter section This is the same as step 2 abov...

Page 131: ...arries the original to the inverter rollers C and the exit rollers take over the original feed out When the original trailing edge passes the feed out sensor D the feed out motor drops to half of its normal speed for 220 milliseconds and then stops The lower speed prevents uneven stacking of originals For A3 or double letter size originals the feed out motor speed does not change due to the length...

Page 132: ...ircuit which sends the motor drive pulses An encoder in the servomotor has two magnetic sensors that generate two pulse signals phase A and B The driver IC monitors the belt speed and direction by these pulse signals and uses this data to regulate the motor s speed Speed Driver Driver CN103 1 PWM ON OFF DF Main Board PCB 1 Circuit CPU IC Data Phase A Phase B 5V CN103 2 CN103 3 CN103 4 CN102 1 CN10...

Page 133: ... motor The frequency generator of the feed out motor makes a very low voltage ac current which is fed back to the driver IC The driver IC monitors the frequency of this ac current and based on the frequency it regulates the motor speed DF Main Board PCB 1 CPU CN104 A2 High Low Regulation FG Driver Drive Circuit IC ON OFF AC Feedback CN104 A15 Voltage CN104 B8 CN104 A12 Motor Feed out Motor STM 3 1...

Page 134: ...DF Main Board PCB1 24 24V 24V 12 5V 12 5V 0 12 5 Original Select SW Pulse Generator Sensor Original Set Sensor P Photoreceiver S Schmitt Trigger Circuit 5 P S CN104 B11 Registration Sensor P S 5 Original Width Sensor P S 5 5V Feed out Sensor CN104 B9 CN104 B15 CN104 B2 CN104 A9 CN104 B17 CN104 B16 CN104 A11 CN104 A1 CN104 B10 CN104 A16 CN104 A10 Lift SW SW1 CN104 A17 CN104 B6 Pick up SOL CN104 A3 ...

Page 135: ...ted when the document feeder is closed The copier then shifts to the document feeder mode The lift switch also serves as the reset switch for document feeder misfeeds When a book or thick maximum thickness 60 mm original is copied the DF acts as a cover for the original as shown in the figure F The lift switch is turned off during this condition so the DF does not function The tension of spring G ...

Page 136: ...within 1 250 milliseconds the CPU determines that there has been an original misfeed OFF check The Original Misfeed indicator also lights if the feed out sensor is not actuated within 1 250 milliseconds after the feed out motor starts turning ON check or if the feed out sensor does not turn off within 1 250 milliseconds after the feed out sensor is actuated OFF check Registration Sensor ON check 6...

Page 137: ...d indicator also lights if the feed out sensor does not turn off within 1 250 milliseconds after the belt drive motor reverses OFF check If a previous original remains on the exposure glass after manual copying and DF feed is attempted the original misfeed indicator lights When the DF is lifted and the previous original is removed DF copying is permitted Registration FS ON check 1250 ms FS OFF che...

Page 138: ...SECTION 4 SORTER ...

Page 139: ...4 lb Bin Capacity Sort Stack 20 sheets A4 81 2 x11 Mode 15 sheets B4 81 2 x 14 10 sheets A3 11 x 17 Top Bin Capacity Non Sort Stack Mode 100 sheets all sizes Power Source 5 volts and 24 volts from the copier Power Consumption 7 7 W Dimensions W x D x H 402 mm x 443 mm x 217 mm 15 8 x 17 4 x 8 5 Weight 7 5 kg 16 5 lb STM 4 1 FT4220 4222 ...

Page 140: ... 1 Sorter Main Board 5 Sorter Switch 2 Paper Sensor 6 Bin Drive Motor 3 Wheel Switch 7 Home Position Switch 4 Roller Drive Motor 1 2 3 4 5 6 1 Bin 2 Transfer Wheel 3 Exit Roller 4 Upper Paper Guide 5 Lower Paper Guide 6 Bin Guide 1 2 3 4 6 7 5 FT4220 4222 4 2 STM ...

Page 141: ... correct position 3 SW2 Sorter Switch Reed switch that becomes activated when the sorter is in the proper position aligned next to the copier Also works as a jam reset switch for the sorter 5 SW3 Home Position Switch Informs the CPU that all the bins are lowered 7 Sensor S1 Paper Sensor Serves as the misfeed sensor for the sorter and also sets exit roller and bin drive timing 2 Printed Circuit Boa...

Page 142: ...e scan signals the data select IC outputs the status of the sensor and switches as the scan output signal The copier main board also sends the sorter drive signal to the drive IC on the sorter main board After receiving the drive signal the drive IC turns on the appropriate motors Sorter Main Board PCB1 12V Scan Signal Scan Output Signal Sorter Drive Signal Copier Main Board PCB1 Roller Drive Moto...

Page 143: ... original are delivered to separate bins starting from the top The copies of the second original are delivered to the same bins but starting from the bottom The copies of the third original start from the top and so on The bin drive motor turns on to advance the bin one step 250 milliseconds after the copy has gone through the paper sensor If the Copy Quantity Clear Stop Book Copy or Sorter key is...

Page 144: ... the exit rollers start rotating The exit rollers continue to rotate for 250 milliseconds after the copy paper has gone through the paper sensor B The roller drive motor C rotates the lower exit roller via the roller drive belt D The shaft of the lower exit roller is a cylindrical cavity type which rotates around the transfer wheel shaft E The paper sensor is positioned just in front of the exit r...

Page 145: ... of the sensor changes the resulting scan output signal Using the scan output signal the copier main board determines the status of the sensor For safety reasons the CPU limits the operation time of the roller drive motor to 5 seconds Paper Sensor CN102 5 CN53 1 CN102 6 CN53 2 CN101 3 CN126 1 CN101 4 CN126 2 CN101 5 CN126 3 CN101 6 CN101 7 CN126 4 CN101 8 CN126 5 CN101 9 CN126 6 Sorter Main Board ...

Page 146: ...ve motor A two transfer wheels B B the wheel switch C and the bins themselves Pins on either side of each bin are inserted into slots called bin guides D D The bins slide up and down in the bin guides The bins sit on each other with the lower bin resting on the permanently mounted 10th bin The upper and lower paper guides pivot up and down depending on the height of the bin to be picked up or rele...

Page 147: ...lift them up Each time the transfer wheels turn 180 degrees they raise one bin To move the bins down the CPU reverses the bin drive motor and the above processes reverses The CPU monitors the position of the bins through pulses generated by the wheel switch and the actuator cam J The actuator cam has two flat sides that are 180 degrees apart and is mounted behind the rear transfer wheel A pulse is...

Page 148: ...status of the switches changes the resulting scan output signal Using the scan output signal the copier main board determines the status of the switch The CPU monitors the on time of the bin drive motor to detect a malfunction of the bin drive motor If the bin drive motor continues to rotate more than twelve seconds the CPU stops machine operation CN102 1 CN51 1 CN51 2 CN101 3 CN126 1 CN101 4 CN12...

Page 149: ...uated Then at 2 75 A4 sideways or 2 80 Letter sideways seconds the CPU checks whether the copy paper has passed through the paper sensor J2 Paper Sensor OFF Check In misfeed condition the Check Paper Path and Misfeed Location indicators lights and copier operation is inhibited To recover the sorter from the misfeed condition the sorter has to be slide away from the copier then after misfed paper r...

Page 150: ...e accessories in the box according to the following list 1 Magnet Catch 1 2 Sorter Holder Bracket 1 3 Sorter Holder Bracket Cover 1 4 Philips Pan Head Screw M4 x 8 8 5 Philips Pan Head Screw M4 x 8 1 6 Screw M4 x 8 1 7 Snap Ring 1 8 Toothed Washer 1 9 Spring Washer 1 10 Interface Harness 1 FT4220 4222 4 12 STM ...

Page 151: ... static brush C damage 1 Turn off the main switch and unplug the power supply cord of the copier 2 Remove the strips and styrofoam blocks D 3 Remove the receiving tray E 4 Remove the rear cover F 4 screws 5 Remove the caps G on the upper left side cover with the pliers 6 Install the magnet catch H on the exit unit I 2 screws D E G F I H C A B STM 4 13 FT4220 4222 ...

Page 152: ...wn 8 Install the sorter D on the sorter holder bracket 1 snap ring as shown 9 Remove the ac harness E from the wire clamp F as shown 10 Install the sorter harness bracket G with the harness 2 screws 11 Reinstall the ac harness into the wire clamp 12 Install the sorter holder bracket cover H 1 screw B C A D H G F E FT4220 4222 4 14 STM ...

Page 153: ...nterface harness E into the clamps F as shown 16 Secure the grounding wire G 1 screw toothed washer H and spring washer I on the bottom plate as shown 17 Plug in the copier power supply cord 18 Change the SP71 data to 1 sorter instruction 19 Reinstall the rear cover and turn on the main switch 20 Check the operation of the sorter D C E B G H I A F STM 4 15 FT4220 4222 ...

Page 154: ...re to prepare it for transportation as follows The sorter may be badly damaged if it is moved without proper preparation 1 If the bins are not at the home position turn on the main switch of the copier to move the bins to the home position 2 Secure the bins with strips of tape as shown in the illustration 3 Remove the sorter from the copier See the Installation Procedure Sorter section FT4220 4222...

Page 155: ...installing it 4 Lift the upper paper guide E up and out of position 5 Lift the lower paper guide F out of position and turn it over to remove the roller drive belt G NOTE Be careful not to damage the sorter home position switch actuator H when reassembling 6 Remove the transfer wheel I spacer J pin K and bushing L 1 C ring 7 Slide the wheel shaft M towards the front and remove the roller drive bel...

Page 156: ...tion 2 Remove all bins A from the bin guides B 3 Apply Grease 501 to the grooves of the bin guides NOTE There are three kinds of bins Therefore when installing the bins be sure that they are installed in the correct order A B C B C B C B C Grease 501 A B C Grease 501 B B A FT4220 4222 4 18 STM ...

Page 157: ...SECTION 5 DUPLEX ...

Page 158: ...1 2 x 11 sideways Paper Weight 58 to 104 g m2 16 to 28 lb Paper Stack 50 sheets Dimension W x D x H 516 x 529 x 90 mm 20 4 x 20 9 x 3 6 Weight Approximately 5 kg 11 lb Specifications are subject to change without notice STM 5 1 FT4220 4222 ...

Page 159: ...ler 4 Transport Roller 10 Duplex Bottom Plate 5 Entrance Roller 11 Jogger Fences 6 Paper End Feeler Electrical Components 1 Duplex Main Board 5 Duplex Entrance Sensor 2 Jogger Motor 6 Duplex Paper End Sensor 3 Jogger HP Sensor 7 Duplex Turn Sensor 4 Duplex Gate Solenoid 8 Duplex Feed Motor 2 3 4 1 5 8 9 7 6 10 11 1 2 3 4 5 6 7 8 FT4220 4222 5 2 STM ...

Page 160: ...lenoid SOL 1 Duplex Gate Solenoid Moves the duplex gate to direct copies to the duplex tray or to the paper exit 4 Sensors S1 Duplex Entrance Sensor Detects copy at the entrance 5 S2 Duplex Turn Sensor Detects copy in the turn section 7 S3 Duplex Paper End Sensor Detects copy in the duplex tray 6 S4 Jogger Home Position Sensor Detects whether the jogger fences are at home position 3 Printed Circui...

Page 161: ... reset signal to the duplex main board to initialize the duplex CPU The duplex main board supplies dc power to all electrical components in the duplex unit All motors and the solenoid operate on 24 volts and all sensors operate on 5 volts The duplex main board has its own CPU which controls all functions in the duplex unit The duplex CPU communicates with the copier main board using a serial inter...

Page 162: ...the duplex main board to initialize the duplex CPU The duplex main board supplies dc power to all electrical components in the duplex unit All motors and solenoid operate on 24 volts and all sensors operate on 5 volts The duplex main board has its own CPU which controls all functions in the duplex unit The duplex CPU communicates with the copier main board using a serial interface 24V VA 5V VC Cop...

Page 163: ...gger fences F move inward to square the copy stack then move back 10 mm After the final copy is delivered to the tray the jogger fences remain against the paper stack 5 3 SECOND SIDE COPY Soon after the final copy is squared by the jogger fences the duplex bottom plate raises up to the final position and the duplex feed rollers start rotating counterclockwise front view to feed the copy to the rel...

Page 164: ... a series of gears A relay gear in the copier exit section transmits drive to the duplex gate rollers D through the duplex transport gear E A rubber belt F on the end of the duplex gate roller shaft drives the transport rollers G The duplex feed motor also drives the duplex bottom plate up and down B A C D E G F STM 5 7 FT4220 4222 ...

Page 165: ...by cassette coding The registration clutch then turns on and the duplex gate solenoid A energizes to raise the duplex gate B The duplex gate solenoid stays on until first side copying is finished The copy is then directed to the duplex turn guide where it is fed by the transport rollers C to the entrance rollers D The leading edge of the copy activates the duplex entrance sensor E which is monitor...

Page 166: ...ers the duplex bottom plate D The tip of the flip mylar E moves to the left front view when the duplex feed rollers rotate to feed the copy into the duplex tray The mylar presses the copy against the rollers ensuring that the trailing edge of the copy clears the guide plate F The paper flatteners G correct curl on the leading edge of the copies The leading edge of the copy actuates the duplex turn...

Page 167: ... the leading edge of the copy the jogger motor A rotates to drive the jogger fences B inward to square the paper stack then the fences move back 10 mm After the last copy of the first side copying run enters the duplex tray the fences remain against the stack B A FT4220 4222 5 10 STM ...

Page 168: ...bottom plate E The paper feed system which consists of the duplex feed roller B and the friction roller F feeds only the top sheet of the stack copies to the relay rollers G in the copier After that the second side copies follow the second feed station paper path After the final copy leaves the duplex bottom plate the paper end feeler H drops through a slot in the duplex bottom plate The paper end...

Page 169: ...uated within 1 110 pulses about 4 4 seconds after the registration clutch turns on The Misfeed Location indicator E turns on J2 Checks whether the duplex turn sensor is actuated within 1 425 pulses about 5 7 seconds after the registration clutch turns on The Misfeed Location indicator E turns on J3 Checks whether the copy paper passes through the duplex entrance sensor 525 pulses 2 1 seconds after...

Page 170: ...nector Bracket 1 4 Shoulder Screw 2 5 Philips Pan Head Screw M3 x 6 4 6 Tray Cover 1 7 Multi Lingual Decal Europe only 1 8 Duplex Harness 1 NOTE 1 When the duplex unit is installed on the copier the DC Power Supply Unit option is required FT4220 copier only 2 When installing the DC Power Supply Unit please refer to the installation procedure enclosed with it STM 5 13 FT4220 4222 ...

Page 171: ...ly unit FT4220 copier only Refer to the installation procedure enclosed with the power supply unit A525 3 Remove the strips and styrofoam blocks A 4 Open the exit unit B and remove it 2 screws 5 Using pliers bend the flaps C all the way under the fusing bottom plate D Be careful not to break them off A B C D FT4220 4222 5 14 STM ...

Page 172: ... reinstall the exit paper guide 7 Remove the upper paper guide C on the exit unit 2 screws and remove the stubs D with nippers 8 Install the three rollers E on the exit unit as shown 9 Reinstall the upper paper guide plate C on the exit unit A C E A B B D D C STM 5 15 FT4220 4222 ...

Page 173: ...te B 2 screws 11 Reinstall the exit unit 2 screws 12 Remove the 1st paper tray from the copier 13 Remove the rear cover 4 screws 14 Remove the power supply cord bracket C 2 screws and support bracket D 1 screw FT4220 copier only B A C D FT4220 copier FT4220 4222 5 16 STM ...

Page 174: ...or 8P Black B to the connector bracket C as shown 2 screws 17 Secure the connector bracket to the rear frame 2 shoulder screws NOTE When installing the bracket make sure that the cut out D on the bracket faces up as shown 18 Reinstall the power supply cord bracket and support bracket FT4220 copier only C B A D STM 5 17 FT4220 4222 ...

Page 175: ...board FT4222 copier only 22 Set the duplex harness F into the wire clamps G as shown 23 Reinstall the rear cover 4 screws 24 Insert the duplex unit into the copier 25 Plug in the copier power supply cord and turn on the main switch 26 Check the operation of the duplex unit 27 Attach the tray cover H on the paper tray I as shown NOTE Explain to the customer how to install the tray cover G F A B CN1...

Page 176: ...m the paper lift arm E and the eccentric cam 5 Remove the clamps F with a pair of pliers 6 Disconnect CN702 CN704 and CN706 G from the main board 7 Disconnect the sensor connector H from the jogger home position sensor 8 Remove the duplex unit I 4 screws and grounding wire from the tray NOTE Hold both sides of the duplex unit frame when lifting the duplex unit out of the tray B C A D I E F G H F S...

Page 177: ...s shown 2 Hook the pressure spring C to the eccentric cam D and the paper lift arm E as shown NOTE When installing the duplex unit make sure of the following a Positioning pin F fits through hole G in the side plate b The sensor harness H is clamped correctly and is not caught under the unit frame A C E D B G F H FT4220 4222 5 20 STM ...

Page 178: ...overs Jogger Motor Replacement 3 Disconnect CN705 A from the duplex main board 4 Replace the jogger motor B 2 screws Jogger Home Position Sensor Replacement 3 Disconnect the sensor connector C 4 Remove the sensor bracket D 1 screw 5 Remove the sensor E from the bracket and replace it 1 screw C D E B A STM 5 21 FT4220 4222 ...

Page 179: ...EMENT 1 Remove the duplex tray 2 Raise the upper and lower paper guides A all the way up 3 Disconnect the turn sensor connector B 4 While lifting the sensor actuator C remove the sensor D 1 screw B C D A FT4220 4222 5 22 STM ...

Page 180: ...e Duplex Unit Removal 2 Remove the paper feed motor bracket A 2 screws 3 Replace the feed motor B 2 screws NOTE When installing the paper feed motor make sure that the bushing C is properly positioned between the bracket and the motor as shown A B C STM 5 23 FT4220 4222 ...

Page 181: ...SOR REPLACEMENT 1 Remove the duplex unit from the tray See Duplex Unit Removal 2 Remove the paper end sensor bracket A 1 screw 3 Disconnect the sensor connector B 4 Replace the sensor C 1 screw C B A FT4220 4222 5 24 STM ...

Page 182: ... 1 Remove the duplex unit from the tray See Duplex Unit Removal 2 Turn over the duplex unit as shown 3 Remove the entrance sensor bracket A 1 screw 4 Disconnect the sensor connector B 5 Replace the sensor C C A B STM 5 25 FT4220 4222 ...

Page 183: ... tray See Duplex Unit Removal 2 Replace the gate solenoid A 1 screw NOTE When installing a new solenoid make sure of the following a Positioning pin B fits into the hole C on the gate solenoid actuator b Spring D is hooked to bracket E E B A C D FT4220 4222 5 26 STM ...

Page 184: ...ook the springs A from the roller bracket B 4 Remove the lock pin C and the roller assembly 5 Remove the roller D 1 snap ring and shaft from the bracket and replace it NOTE This friction roller has a one way clutch Be sure to install the roller so that it rotates in the direction of the arrow See illustration C A D B STM 5 27 FT4220 4222 ...

Page 185: ...and the upper paper guide plate stopper E 1 shoulder screw 5 Remove the upper and lower guide paper plates F 6 Remove the paper end feeler shaft G 1 E ring 7 Remove the E ring H on the front side of the feed roller shaft I 8 Remove the feed roller shaft 2 bushings 9 Remove the feed support roller J flatter K paper retainer L then replace the feed roller M 1 E ring and parallel pin per roller H I L...

Page 186: ...OPIER SERVICE TRAINING MANUAL Only the differrences from the FT4220 4222 A110 A111 copier are described in the following pages Refer to the FT4220 4222 A110 A111 copier service manual regarding the other information ...

Page 187: ...he fusing temperature when the copier is not in use The energy saving ratio can be changed by SP mode The automatic energy saver mode is selected by SP mode 3 User Program Mode FT4215 Yes FT4415 No Copier Installation 1 Shipping Retainers The following shipping retainers are removed to reduce the installation time Optics Lock Pins Scanner Lock Plate and Plugs Drum Protective Sheet 2 Toner Supply U...

Page 188: ...er supply unit A494 is required The sorter interface harness is an accessory of the optional dc power supply unit 2 DF Installation FT4220 The optional dc power supply unit A525 is required The DF interface harness is an accessory of the optional dc power supply unit FT4415 The optional dc power supply unit A494 is required The DF interface harness is an accessory of the optional dc power supply u...

Page 189: ...ve Circuit The scanner motor drive circuit is located on the main DC power supply board The main board sends the control signal to the scanner motor drive circuit to regulate the scanner motor speed The main board directly controls the scanner motor Development 1 Bias Voltage in ADS mode The number of base bias voltage levels corresponding to the ADS output voltage is increased 6 levels This chang...

Page 190: ...18 series The toner end sensor is used for both black and color toner end detection The ID sensor is used as a back up system 2 Black Toner End Recovery If the front cover is opened and closed or the main switch is turned off and on in the near end and toner end conditions no copy can be made For the color toner only one copy can be made same as for the FT4418 series Only one copy can be made in b...

Page 191: ...DG version Enlargement 141 122 155 129 Full size 100 100 Reduction 93 82 71 93 74 65 Zoom From 50 to 200 in 1 steps Copying Speed 15 copies minute A4 11 x 81 2 sideways 10 copies minute A3 11 x 17 Warm Up Time Less than 60 seconds at 20 C First Copy Time 5 9 seconds A4 11 x 81 2 sideways for cassette feed Copy Number Input Ten keys 1 to 99 count up Manual Image Density Selection 7 steps Automatic ...

Page 192: ...apacity 250 sheets B4 81 2 x 14 and smaller 100 sheets A3 11 x 17 Power Source 110 V 60 Hz 15 A for Taiwan 115 V 60 Hz 15 A for North America 220 230 240 V 50 Hz 8 A for Europe 220 V 60 Hz 8 A for Middle East Refer to the serial number plate rating plate to determine the power source required by the machine Power Consumption Copier Only Full System Maximum 1 2 KVA 1 5 KVA Warm up 800 VA average 80...

Page 193: ...r are installed Noise Emissions Maximum Copy cycle Stand by Copier only less than 58 dB less than 55 dB less than 40 dB Full system less than 60 dB less than 58 dB less than 40 dB Weight Copier only 50 kg 110 2 lb Full system 67 kg 147 7 lb Optional Equipment and Machine Configuration Machine Code Configuration Optional dc power supply unit A525 Optional equipment Required Not required 10 bin sort...

Page 194: ...aning blade removes any toner remaining on the drum A cleaning brush is not used in the FT4215 A128 copier 4 DEVELOPMENT 5 PRE TRANSFER LAMP 6 IMAGE TRANSFER 7 PAPER 3 ERASE 2 EXPOSURE 1 DRUM CHARGE 9 QUENCHING 8 CLEANING SEPARATION PTL STM 6 4 FT4215 ...

Page 195: ...Charge Corona Unit 10 Sixth Mirror 11 Erase Lamp 12 OPC Drum 13 Development Unit 14 Toner Supply Unit 15 Optics Cooling Fan 16 1st Feed Roller 17 Manual Feed Table 18 Pick up Roller 19 Separation Roller 20 Registration Rollers 21 Pre transfer Lamp PTL 22 Transfer and Separation Corona Unit 23 Pick off Pawls 24 Cleaning Blade 25 Pressure Roller 26 Hot Roller 27 Exit Rollers 28 Hot Roller Strippers ...

Page 196: ...t Section Drum Fusing and Exit Section BP1 Timing Belt Pulley G2 Relay Gear G18 Relay Gear G21 Cleaning Drive Cleaning Toner Supply CL Toner Supply Unit G17 Toner Supply CL Gear Development Unit Development CL Solenoid G28 Exit Roller Gear G16 Development CL Gear G27 Relay Gear G26 Relay Gear BP2 Timing Belt Pulley G25 Hot Roller Gear A G22 Relay Gear G19 Drum Drive Gear G3 Timing Belt Drive Gear ...

Page 197: ...ation CL Gear G4 Relay Gear Registration CL G5 Relay Gear Registration Roller Paper Feed CL G6 1st Paper Feed CL Gear Paper Feed Gear G7 Relay Gear Paper Feed Rollers G8 Paper Lift CL Gear Paper Lift CL G9 Paper Lift Gear G10 Sector Gear A FT4215 6 7 STM ...

Page 198: ...irror Motor 10 Pick up Roller Release Solenoid 11 Manual Feed Table Switch 12 Color Switch 13 Paper Lift Clutch 14 Paper Feed Clutch Solenoid 15 Registration Clutch 16 Paper Size Switch 17 Paper End Sensor 18 Paper Lift Sensor 19 Registration Sensor 20 Total Counter 21 Pre transfer Lamp PTL 22 ID Sensor Board 23 Erase Lamp 24 Fusing Lamp 25 Quenching Lamp QL 26 Auto Image Density Sensor 27 Fusing ...

Page 199: ...ty Switch 36 Main Switch 37 Exhaust Blower Motor 38 Drum Anti condensation Heater 39 Main DC Power Supply Board 40 Option DC Power Supply Board 41 Option Transformer 42 Main Transformer 43 AC Drive Board 44 Main Motor Capacitor 45 Main Board 46 TC SC Power Pack 47 CC Grid Bias Power Pack 48 Optics Cooling Fan Motor FT4215 6 9 STM ...

Page 200: ...utches MSC2 Paper Lift Clutch Lifts paper to the appropriate feed station 13 MSC3 Registration Clutch Drives the registration rollers 15 Solenoids SOL1 Paper Feed Clutch Solenoid Starts paper feed from the first paper station 14 SOL2 Pick up Roller Release Solenoid a After a sheet of paper is fed releases the pick up roller from next sheet b When the manual feed table is used releases the pick up ...

Page 201: ...ard Controls all copier functions both directly and through the other PCBs 45 PCB2 AC Drive Board Drives all ac motors the exposure lamp fusing lamp quenching lamp and exhaust blower motor 43 PCB3 Main DC Power Supply Board Rectifies 28 Vac input and outputs dc voltages 39 PCB4 Operation Panel Board Informs the CPU of the selected modes and displays the situations on the panel 32 PCB5 Option DC Po...

Page 202: ... Used for control of authorized use Copier will not operate until installed N A Transformer TR1 Main Transformer Steps down the wall voltage to 28 Vac 42 TR2 Option Transformer Steps down the wall voltage to 26 Vac and 10 Vac This transformer is required when the document feeder is installed 41 Others TH Fusing Thermistor Monitors the fusing temperature 27 TF Fusing Thermofuse Provides back up ove...

Page 203: ...n DC Power Supply Board AC Drive Board Sorter ac power dc power Lens Motor Cover Safety SW Scanner Motor FU 100 28V Control Signal 28VAC 28VAC RAM PCB Main Board Control Signal 24V VM 24V VA 24V VA 5V VC Scanner Motor Drive Circuit 24V VA Main Motor Relay RA402 Exposure Lamp Drive Circuit Fusing Lamp Drive Circuit Power Relay RA401 Anti condensation Heater Drum Optics Option Zero Cross AC Power 11...

Page 204: ...oard The main dc power supply board has a scanner motor drive circuit The scanner motor drive circuit produces scanner motor drive signals The copier main board supplies dc power to all copier dc components except the scanner motor All sensors and switches operate on 5 volts All other dc components including the power relay RA401 and the main motor relay RA402 operate on 24 volts The copier main b...

Page 205: ... turn on and the exhaust blower starts rotating at high speed When the main switch is turned off power is cut off to the main board and to RA401 and the drum and optional anticondensation heaters are turned on The exposure lamp and the fusing lamp power lines are completely disconnected from the line voltage FT4215 6 15 STM ...

Page 206: ...lls into the cleaning unit The toner collection roller C carries the used toner to the used toner tank The light of the quenching lamp D neutralizes any charge remaining on the drum in preparation for the next copy cycle The cleaning blade releases when the release knob is pressed This prevents the drum from being damaged when the cleaning unit is removed or installed D A C B STM 6 16 FT4215 ...

Page 207: ...h the main motor gear A the relay gear B and the cleaning drive gear C The gear D driven by the cleaning drive gear passes the rotation to the toner collection roller gear E The cleaning blade F is mounted in the center of the blade and is tilted to apply even pressure F D C B E A FT4215 6 17 STM ...

Page 208: ...2 Checks whether the exit sensor is actuated within 700 pulses 2 8 seconds after the registration clutch turns on Misfeed Location indicator C turns on J3 Checks whether the copy paper has passed through the exit sensor 2 75 A4 sideways or 2 80 Letter sideways seconds after the exit sensor has been actuated Misfeed Location indicator D turns on 2285 LT S J2 2700 J3 2 75 sec A4 sidewise 2 80 sec LT...

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