Ricoh Aficio MP 1900 Service Training Download Page 17

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D096

Ricoh Co. Ltd.

http://www.ricoh.com/

Slide 17

Mechanical Components Layout

2nd Mirror

Exposure

Lamp

1st Mirror

3rd Mirror

Exposure Glass

Lens Block

SBU

Scanner

HP Sensor

Scanner

Motor

Exit Sensor

Exit Roller

Hot Roller

Toner Supply Bottle Holder

OPC Drum

Image Density Sensor

Registration Sensor

By-pass Feed Roller

By-pass Tray

Laser Unit

Polygon

Mirror
Motor

WTL

Development Roller

Paper End Sensor

Paper Feed Roller

Friction Pad

Pressure Roller

Registration Roller

Summary of Contents for Aficio MP 1900

Page 1: ...D096 1 Ricoh Co Ltd http www ricoh com Slide 1 D096 Service Training Introduction Uploaded November 17th 2009...

Page 2: ...on Product Concept Low cost Simple operation Appearance New Blue Internal Exit Tray Compared to B245 Faster printing speed B245 15cpm D096 19cpm Faster warm up B245 Less than 15 seconds D096 Less than...

Page 3: ...D096 3 Ricoh Co Ltd http www ricoh com Slide 3 D096 Service Training 1 Product Outline...

Page 4: ...o Ltd http www ricoh com Slide 4 The Machine This is the machine you will study in this training course Note the following Paper tray Bypass tray On right side of machine See next slide Operation pane...

Page 5: ...D096 5 Ricoh Co Ltd http www ricoh com Slide 5 Bypass Tray By pass Tray...

Page 6: ...icoh com Slide 6 Operation Panel Start Error Load Paper Add Toner Display Selection Scroll Clear Stop Main Power Indicator Operation Switch key Escape Lighter Darker Sort Number Keys OK Original Type...

Page 7: ...7 External Part Names Paper Tray Front Cover Operation Panel Main Power Indicator Main Power Switch Internal Tray Internal Tray Exposure Glass Platen Cover ADF optional Operation Switch Operation Swit...

Page 8: ...D096 8 Ricoh Co Ltd http www ricoh com Slide 8 Optional Units Platen Cover B406 See following slide ADF B813 See following slide Accessibility Handle Type A B272...

Page 9: ...D096 9 Ricoh Co Ltd http www ricoh com Slide 9 Platen Cover ADF Optional Platen Cover B406 ADF Automatic Document Feeder B813 Main Unit D096...

Page 10: ...D096 10 Ricoh Co Ltd http www ricoh com Slide 10 D096 Service Training 2 Specifications...

Page 11: ...process Dry electrostatic transfer system Zoom 50 to 200 in 1 steps Power Consumption Full system Less than 1 28 kW Reduced Electrical Consumption via Lower Power mode Less than 1 W See Energy Saver M...

Page 12: ...D096 12 Ricoh Co Ltd http www ricoh com Slide 12 D096 Service Training 3 Installation...

Page 13: ...lization must be performed via SP 2214 1 After installing machine all options and making all test copies record value of total counter This is very important because this value will be used for billin...

Page 14: ...p corner of bag for better control when pouring Make sure not to spill developer on the gears If you have to turn the gears to distribute developer evenly make sure to do so very slowly and as little...

Page 15: ...Ltd http www ricoh com Slide 15 Installation Options Regarding Platen Cover and ADF only one of these options can be installed at a time Platen Cover Installation see service manual ADF Installation s...

Page 16: ...D096 16 Ricoh Co Ltd http www ricoh com Slide 16 D096 Service Training 4 Machine Overview...

Page 17: ...lass Lens Block SBU Scanner HP Sensor Scanner Motor Exit Sensor Exit Roller Hot Roller Toner Supply Bottle Holder OPC Drum Image Density Sensor Registration Sensor By pass Feed Roller By pass Tray Las...

Page 18: ...D096 18 Ricoh Co Ltd http www ricoh com Slide 18 Paper Path ADF Original Feed Paper feed from Tray 1 Paper feed from By pass Tray...

Page 19: ...096 19 Ricoh Co Ltd http www ricoh com Slide 19 Main motor drives fusing unit PCU and development unit PCU Scanner Motor Hot Roller Development roller OPC Drum Drive Layout Fusing Unit Development Uni...

Page 20: ...D096 20 Ricoh Co Ltd http www ricoh com Slide 20 Copy Process Development Laser exposure Drum charge Cleaning Image transfer Paper separation...

Page 21: ...D096 21 Ricoh Co Ltd http www ricoh com Slide 21 D096 Service Training 5 Scanner...

Page 22: ...D096 22 Ricoh Co Ltd http www ricoh com Slide 22 Scanner Unit 600 dpi CCD Exposure lamp One xenon lamp The reflector reduces shadows on paste up originals...

Page 23: ...http www ricoh com Slide 23 Scanner Drive Scanner drive motor Drives the scanner 100 mm s Timing belts are used in this model In ADF mode scanner stays at home position Original is scanned while ADF...

Page 24: ...s SP 4008 Sub scan magnification SP 4009 Main scan magnification SP 4010 Leading edge registration SP 4011 Side to side registration SP 4013 Scanner free run exposure lamp off SP 4305 Determines how m...

Page 25: ...D096 25 Ricoh Co Ltd http www ricoh com Slide 25 D096 Service Training 6 Image Processing...

Page 26: ...D096 26 Ricoh Co Ltd http www ricoh com Slide 26 Image Processing Circuit Data comes to the BICU board from two sources Scanner and SBU...

Page 27: ...The CCD converts the light reflected from the original into an analog signal Each CCD line has 7 400 pixels producing a resolution of 600 dpi 23 6 lines mm SBU IPU BICU Analog Processing 1 Analog Pro...

Page 28: ...D096 28 Ricoh Co Ltd http www ricoh com Slide 28 Image Processing Unit...

Page 29: ...coh com Slide 29 Image Quality Adjustments 1 3 Three basic original types Text Photo Special can only be accessed through a user tool Ten original types in total selectable with a user tool Text modes...

Page 30: ...operation panel has two settings Text Photo The default settings are Text indicator lit Normal Text Text 1 Photo indicator lit Photo Priority Photo 1 To allocate an original type Light either the Tex...

Page 31: ...essing adjustments List See SP Modes for Each Image Processing Step in the service manual Table See page following list of SP modes in the service manual SP 4921 Selects one of the original modes only...

Page 32: ...to shading SP 4903 ADS level SP 4904 Lower limit for ADS SP 4905 Determines how much of the image is used for ADS the whole width or just a narrow strip Use SP 4015 to adjust the area of the white pla...

Page 33: ...D096 33 Ricoh Co Ltd http www ricoh com Slide 33 D096 Service Training 7 Laser Exposure...

Page 34: ...D096 34 Ricoh Co Ltd http www ricoh com Slide 34 Laser Optics One laser beam There is only one laser beam in this model...

Page 35: ...front or right side cover is open a switch cuts power to the laser diode Both covers operate the same switch LDD LDD Drive Board Front Right Cover Safety Switches PSU BICU 5VLD 24V Optical Path PD LD...

Page 36: ...36 SP Modes SP 2915 Polygon mirror idling time SP 2998 Main scan magnification printer There is also a main scan adjustment for the scanner which affects image processing algorithms SP 2998 affects l...

Page 37: ...D096 37 Ricoh Co Ltd http www ricoh com Slide 37 D096 Service Training 8 PCU Photo Conductor Unit...

Page 38: ...new PCU detection in this machine This is due to the PCU not being a user replaceable part Some of the PCU components are replaced individually at PM When a new PCU is installed new developer must als...

Page 39: ...39 PCU Components OPC Drum 30 mm diameter Charge Roller With cleaning brush Pick off Pawls Cleaning Unit Counter blade mechanism Edge cleaning mechanism Toner recycling Development Roller Charge Roll...

Page 40: ...following OPC drum Development unit including development roller and TD sensor Charge roller and charge roller cleaning brush Drum cleaning unit blade toner collection coil Pick off pawls The PCU doe...

Page 41: ...D096 41 Ricoh Co Ltd http www ricoh com Slide 41 Drive Main motor drives the drum Main Motor...

Page 42: ...D096 42 Ricoh Co Ltd http www ricoh com Slide 42 D096 Service Training 9 Process Control...

Page 43: ...D096 43 Ricoh Co Ltd http www ricoh com Slide 43 Drum Charge Roller Roller is always in contact with drum Drum charge roller is at 1700 V for printing Drum surface voltage is 950 V Drum Charge Roller...

Page 44: ...oh com Slide 44 Charge Roller Voltage Correction Temperature and humidity affect efficiency of voltage transfer to drum from drum charge roller Lower humidity causes a higher drum charge voltage As a...

Page 45: ...ing Not for every page or every print or copy job but at the following times While machine is recovering from energy saver mode or while machine starts BICU ignores ID sensor signals if fusing tempera...

Page 46: ...46 Charge Roller Cleaning Cleaning Brush is always in contact with drum charge roller A cam gear moves the charge roller from side to side to improve cleaning This waste toner is not recycled Charge...

Page 47: ...D096 47 Ricoh Co Ltd http www ricoh com Slide 47 SP Modes SP 2001 Charge roller voltage adjustment for printing and for making an ID sensor pattern...

Page 48: ...D096 48 Ricoh Co Ltd http www ricoh com Slide 48 D096 Service Training 10 Toner Supply...

Page 49: ...D096 49 Ricoh Co Ltd http www ricoh com Slide 49 Overview Single development roller Two mixing augers Toner density control TD sensor Development Roller TD Sensor...

Page 50: ...ricoh com Slide 50 Drive Main motor Drives development mechanism via development drive shaft Development drive shaft Engages when PCU is pushed in Development roller turns whenever main motor is on No...

Page 51: ...Slide 51 Developer Mixing Two mixing augers keep developer mixed Auger 2 moves excess toner from development roller towards front Auger 1 moves this excess toner mixed with new toner to rear and back...

Page 52: ...ite areas High negative charge 950V Black areas Discharged by the laser about 150V Development bias 650V Forces the negatively charged toner onto the discharged areas of the drum Applied to developmen...

Page 53: ...ricoh com Slide 53 Toner Bottle Replenishment Lever When bottle is placed in bottle holder Shutter moves against side of PCU and it opens When lever is returned Cap is pulled away so that toner can co...

Page 54: ...ww ricoh com Slide 54 Toner Supply Motor Toner supply motor turns the bottle To supply fresh toner to development unit toner supply motor turns on Spiral grooves help toner to move towards bottle exit...

Page 55: ...icoh com Slide 55 Toner Supply Input to Development Unit Mylar tabs in bottle unit push toner towards development unit entrance Recycled toner from drum also arrives at this entrance Recycled toner en...

Page 56: ...lide 56 Toner Supply Control Controlled by TD and ID sensors Four modes Normally use sensor control 1 Use fixed control 2 temporarily if TD sensor needs replacing but no spare is available Do not use...

Page 57: ...p www ricoh com Slide 57 Abnormal Sensor Conditions 1 2 ID sensor If ID sensor output is out of spec machine disregards output from sensor and uses a Vref of 2 5 V After replacing ID sensor reset erro...

Page 58: ...tions 2 2 TD sensor If TD sensor output is out of spec machine changes to fixed supply mode 2 Toner supply motor on always for 200 ms per page Copying continues until a TD sensor error is detected 10...

Page 59: ...by TD sensor output current and reference voltages If near end is detected toner is added for a short period adjustable with SP 2 923 If the toner level does not recover toner end is after 50 more cop...

Page 60: ...r end is detected Toner is added after the copy job If supply recovers to Vt level 5 near end is cancelled Otherwise toner end occurs after 50 copies If Vt level 7 is detected 3 consecutive times tone...

Page 61: ...D096 61 Ricoh Co Ltd http www ricoh com Slide 61 SP Modes Development SP 2201 Development bias printing ID sensor pattern creation SP 2802 Forced developer agitation...

Page 62: ...Vt etc if an ID sensor error occurred SP 2908 Forced toner supply SP 2921 Toner supply mode sensor control fixed control SP 2922 Toner supply motor on time sensor control mode SP 2925 Toner supply mot...

Page 63: ...er Near end End SP 2213 Number of copies between near end and end 20 or 50 default 50 SP 2923 Toner supply motor on time during recovery from end near end SP 2928 Clears the toner end condition Normal...

Page 64: ...D096 64 Ricoh Co Ltd http www ricoh com Slide 64 D096 Service Training 11 Drum Cleaning Toner Recycling...

Page 65: ...D096 65 Ricoh Co Ltd http www ricoh com Slide 65 Drum Cleaning Counter blade system no brush Drum reverse rotation to clean blade s edge...

Page 66: ...td http www ricoh com Slide 66 Toner Recycling Toner collection coil Moves toner towards opening in PCU Photo Conductor Unit This is same opening as is used for fresh toner from toner bottle Toner Col...

Page 67: ...D096 67 Ricoh Co Ltd http www ricoh com Slide 67 D096 Service Training 12 Transfer and Separation...

Page 68: ...com Slide 68 Overview Transfer roller is always in contact with drum Drum curvature pick off pawl and discharge plate separate paper from drum Transfer Roller Discharge Plate Pick off Pawl Transfer R...

Page 69: ...96 69 Ricoh Co Ltd http www ricoh com Slide 69 Drive Drum drives Transfer Roller through gear Transfer Roller always contacts drum There is no touch and release mechanism Main Motor Transfer roller Dr...

Page 70: ...print area Prevents positively charged toner remaining on drum from transferring to roller Then high current is supplied amount depends on paper size and type This transfers toner to paper Finally at...

Page 71: ...and positively charged toner particles are both transferred back to drum Current for negative charge phase can be adjusted with SP 2301 4 Three conditions for entering cleaning mode Before starting a...

Page 72: ...Ltd http www ricoh com Slide 72 Separation Drum curvature and Discharge Plate separate paper from drum There is no adjustment for discharge voltage in this machine because discharge plate is grounded...

Page 73: ...SP Modes SP 2301 Transfer current SP 2301 1 Paper tray Normal paper SP 2301 2 By pass tray For special thick paper SP 2301 4 During transfer roller cleaning SP 2906 Image writing position shift SP 299...

Page 74: ...D096 74 Ricoh Co Ltd http www ricoh com Slide 74 D096 Service Training 13 Paper Feed...

Page 75: ...D096 75 Ricoh Co Ltd http www ricoh com Slide 75 Overview Built in paper trays 250 sheets each Friction pad and feed roller system By pass tray Up to 100 sheets...

Page 76: ...ed mechanism Paper feed clutches transfer main motor drive to paper feed roller When paper feed clutch turns on feed roller starts to feed paper Paper feed clutch stays on until shortly after registra...

Page 77: ...D096 77 Ricoh Co Ltd http www ricoh com Slide 77 Feed and Separation Feed roller and friction pad Pressure from friction pad not adjustable...

Page 78: ...icoh com Slide 78 Tray Lift When the tray is closed projection on copier frame pushes slider off bottom plate hook Slider is on bottom part of tray After slider comes off compressed springs lift botto...

Page 79: ...D096 79 Ricoh Co Ltd http www ricoh com Slide 79 Paper end sensor feeler falls through slot in bottom plate when there is no paper Paper End Detection...

Page 80: ...6 80 Ricoh Co Ltd http www ricoh com Slide 80 Paper Size Detection Paper Tray Dial and microswitch mechanism Paper size sensor detects position of dial selected by user User must set dial to correct s...

Page 81: ...D096 81 Ricoh Co Ltd http www ricoh com Slide 81 Paper Size Detection By pass Tray Bypass paper size switch monitors paper width Side fences turn a gear wheel that contains sensor terminals...

Page 82: ...D096 82 Ricoh Co Ltd http www ricoh com Slide 82 Side Fences Side fences have stoppers to prevent them from bending when a full tray is pushed in too strongly...

Page 83: ...Co Ltd http www ricoh com Slide 83 Registration Registration clutch transfers drive from main motor to registration roller SP 1003 adjusts amount of buckle at registration roller to prevent skew Regis...

Page 84: ...icoh com Slide 84 SP Modes SP 1001 Leading edge registration SP 1002 Side to side registration SP 4010 11 Scanner registration SP 6006 ADF registration SP 1003 Paper feed timing Adjusts buckle at regi...

Page 85: ...D096 85 Ricoh Co Ltd http www ricoh com Slide 85 D096 Service Training 14 Fusing...

Page 86: ...D096 86 Ricoh Co Ltd http www ricoh com Slide 86 Overview Two fusing lamps Not identical Pressure Roller has a Cleaning Roller Thin walled hot roller No oil supply mechanism...

Page 87: ...D096 87 Ricoh Co Ltd http www ricoh com Slide 87 Fusing unit is driven by main motor through gears Paper exit rollers are driven by main motor through a timing belt Main motor Exit rollers Drive...

Page 88: ...p www ricoh com Slide 88 Automatic Pressure Release Fusing unit drive gear disengages when cover is open for easier jam removal Fusing drive release solenoid cuts drive to fusing unit during warm up D...

Page 89: ...D096 89 Ricoh Co Ltd http www ricoh com Slide 89 If paper creases in fusing unit move guide to right Fusing Entrance Guide Shaft...

Page 90: ...D096 90 Ricoh Co Ltd http www ricoh com Slide 90 The springs apply pressure between hot roller and pressure roller The springs can be moved Default position is at end Pressure Roller...

Page 91: ...D096 91 Ricoh Co Ltd http www ricoh com Slide 91 Cleaning Roller Cleaning Roller is always in contact with Pressure Roller This removes toner and paper dust Cleaning Roller Pressure Roller...

Page 92: ...p www ricoh com Slide 92 Fusing Temperature Control Machine checks thermistors once every 1 5 seconds Machine compares current and previous readings and the target and then decides how long to keep la...

Page 93: ...www ricoh com Slide 93 Fusing Lamp Power Supply Soft Start Full power is applied to the fusing lamp gradually not all at once Machine gradually allows more power to fusing lamp over a number of zero...

Page 94: ...h com Slide 94 Room Lighting Affects Caused by starting and stopping fusing lamp power every second SP 1108 Reduce flicker by inputting a larger value BICU may be unable to detect fusing lamp errors i...

Page 95: ...Ltd http www ricoh com Slide 95 Poor Fusing on the First Few Copies If the room is cold the hot roller may not stay hot for very long after reaching the print ready temperature To solve this problem s...

Page 96: ...on Narrow Paper Target fusing temperature lowered by 10 C If the smallest copy paper width detected during a 40 second interval is less than 220 mm Target fusing temperature lowered by another 5 C If...

Page 97: ...w Paper To ensure that images are properly fused onto paper 220 mm or less in width machine automatically reduces copy speed under following conditions After 180 seconds of continuous copying When Thi...

Page 98: ...ction This machine has three features to protect itself from overheating The first feature normally protects the hardware The second feature works as the failsafe feature for the first feature The thi...

Page 99: ...g on off SP 1105 Fusing unit temperatures SP 1106 Displays the current fusing unit temperature SP 1107 Soft start adjustment SP 1108 Fusing temperature control cycle 1 1 5 or 2 seconds SP 1109 Nip ban...

Page 100: ...D096 100 Ricoh Co Ltd http www ricoh com Slide 100 D096 Service Training 15 Paper Exit...

Page 101: ...D096 101 Ricoh Co Ltd http www ricoh com Slide 101 Paper exit rollers are driven by main motor through a timing belt Main motor Exit rollers Drive...

Page 102: ...D096 102 Ricoh Co Ltd http www ricoh com Slide 102 D096 Service Training 16 Peripheral Devices...

Page 103: ...D096 103 Ricoh Co Ltd http www ricoh com Slide 103 ADF...

Page 104: ...nning No inverter unit The DF exposure glass is a narrow glass to the left of the exposure glass The ADF does not use the main exposure glass unless the user selects book mode and places the originals...

Page 105: ...icoh Co Ltd http www ricoh com Slide 105 Original Size Detection Two width sensors and two length sensors All sensors are reflective photosensors See Supported Paper Sizes under Specifications in serv...

Page 106: ...096 106 Ricoh Co Ltd http www ricoh com Slide 106 Pick up Mechanism Original set sensor detects when original has been placed in feeder Pick up solenoid drops pick up roller onto top sheet of original...

Page 107: ...D096 107 Ricoh Co Ltd http www ricoh com Slide 107 Separation Mechanism Transport motor drives all rollers Feed clutch drives pick up roller and feed belt...

Page 108: ...D096 108 Ricoh Co Ltd http www ricoh com Slide 108 Transport and Feed out Transport motor feeds original through scanner Motor speed depends on reproduction ratio...

Page 109: ...http www ricoh com Slide 109 ADF Sensors Note Do not cover above sensors with your hands or place objects on them Doing so could cause Paper size to be detected incorrectly Paper misfeed error message...

Page 110: ...D096 110 Ricoh Co Ltd http www ricoh com Slide 110 SP Modes SP 6006 Registration SP 6009 ADF free run SP 6901 APS sensor display for the ADF...

Page 111: ...D096 111 Ricoh Co Ltd http www ricoh com Slide 111 D096 Service Training 17 Maintenance...

Page 112: ...intervals of 60 K and 120 K Reset the PM counter after finishing PM SP 7804 1 See How to Reset the PM Counter in the service manual SP Modes SP 5501 1 PM alarm 0 No alarm SP 7803 Current PM counter s...

Page 113: ...D096 113 Ricoh Co Ltd http www ricoh com Slide 113 D096 Service Training 18 Troubleshooting...

Page 114: ...114 Memory All Clear Before memory all clear either SP 5990 Print lists of settings SMC lists SP 5824 Upload NV RAM contents From NV RAM to Flash Memory SP 5825 Download Flash Memory contents From Fl...

Page 115: ...D096 115 Ricoh Co Ltd http www ricoh com Slide 115 Self Diagnostics This is a start up self diagnostics procedure automatically done just after power has been switched on SP 7832 Result of diagnostics...

Page 116: ...D096 116 Ricoh Co Ltd http www ricoh com Slide 116 Printing SMC Reports SP 5990 Engine...

Page 117: ...l cycle Increase if the user complains about flickering room lights However fusing lamp errors may not be detected SP 1903 Re energizes the feed clutch Increase the value if jams occur when feed resta...

Page 118: ...he paper trays SP 2301 4 Increase if there is dirty background on the rear side SP 2996 Enable this if there is dirty background on the reverse side of the first copy of a job The transfer roller will...

Page 119: ...ptom Troubleshooting 3 3 SP 2906 Tailing correction Adjust this if there are ghosts of thin vertical lines further down page from where vertical lines on image stop SP 6910 ADF shading interval Reduce...

Page 120: ...lide 120 SP Modes Tests SP 1007 By pass paper size sensor output display SP 4902 Exposure lamp on SP 5001 Operation panel indicators on SP 5803 Input tests SP 5804 Output tests SP 5902 Test pattern pr...

Page 121: ...D096 121 Ricoh Co Ltd http www ricoh com Slide 121 SP Modes Free Runs SP 4013 Scanner with lamp on SP 5802 Scanner and printer SP 5901 Printer SP 6009 ADF...

Page 122: ...D096 122 Ricoh Co Ltd http www ricoh com Slide 122 D096 Service Training 19 Environmental Conservation...

Page 123: ...D096 123 Ricoh Co Ltd http www ricoh com Slide 123 Promote Use of Energy Saving Features Energy Saver Mode Proper use of energy saver modes saves energy and is environmentally friendly...

Page 124: ...4 Ricoh Co Ltd http www ricoh com Slide 124 Energy Saver Modes 1 3 Energy saver mode should be utilized to save energy protect environment Area shaded grey in diagram above represents amount of energy...

Page 125: ...with User Tools System settings Timer setting Energy saver timer 1 240 min Energy Saver Mode Default setting 1minute Auto off timer 1 240 min Off Mode Default setting 1 minute Example Energy saver ti...

Page 126: ...ttp www ricoh com Slide 126 Energy Saver Modes 3 3 Recommendation We recommend that default settings be used If customer requests settings change please explain Energy costs could increase The environ...

Page 127: ...ne can be estimated 8941 001 Operating mode 8941 002 Standby mode 8941 003 Panel off mode 8941 005 Off sleep mode This should only be used as a reference value because power consumption specifications...

Page 128: ...41 001 005 Machine Status 3 Find amount of time spent in each mode Subtract earlier measurement from later measurement and convert result to hours 4 Power consumption figures for each model are acquir...

Page 129: ...le calculations Mode condition SP8941 Machine Status Time at Start min Time at End min Running time hour 60 Power Consumption Spec W Power consumption KWH 1000 Operating 001 Operating Time 21089 21386...

Page 130: ...D096 130 Ricoh Co Ltd http www ricoh com Slide 130 End of Course...

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