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31 October 2001

PAPER FEED

3-15

Replacement

Adjustment

3.6 PAPER

FEED

3.6.1 PICK-UP ROLLER / PAPER FEED ROLLER / FRICTION PAD

•

Lower the paper table.

[A]: Pick-up roller (

x 1)

[B]: Paper guide
[C]: Feed roller (

x 1)

[D]: Friction pad

3.6.2 PAPER SEPARATION PRESSURE ADJUSTMENT

Purpose: To ensure that the friction pad
exerts sufficient pressure for smooth
printing paper separation.

Default: The next position to the top.

Adjust the paper separation pressure by
loosening and moving the adjusting screw
[A] up or down.

Moving up the screw

⇒

Increases the

paper separation pressure

Moving down the screw

⇒

Decreases the

paper separation pressure

Tighten the screw after the adjustment.

C238R024.WMF

C238R031.WMF

[A]

[B]

[C]

[D]

[A]

Содержание Gestetner 5428C

Страница 1: ...SERVICE MANUAL Machine code C238...

Страница 2: ...dent induce vomiting by sticking a finger down your throat or by giving soapy or strong salty water to drink OBSERVANCE OF ELECTRICAL SAFETY STANDARDS 1 The printer and its peripherals must be install...

Страница 3: ...hen keeping used lithium batteries from the main processing units in order to dispose of them later do not store more than 100 batteries from the main processing units per sealed box Storing larger nu...

Страница 4: ...10 Accessory Check 1 10 Installation Procedure 1 11 ADF stabilizer installation 1 14 1 2 4 TAPE MARKER OPTION 1 15 Accessory Check 1 15 Installation Procedure 1 16 For C238 1 16 For C231 and C237 1 1...

Страница 5: ...JUSTMENT 3 15 3 6 3 PAPER WIDTH DETECTION BOARD 3 16 3 7 PRINTING 3 17 3 7 1 PRESS ROLLER 3 17 3 7 2 PRESS ROLLER RELEASE LEVER ADJUSTMENT 3 18 3 7 3 PRINTING PRESSURE ADJUSTMENT 3 19 3 8 DRUM 3 20 3...

Страница 6: ...2 BASIC SETTINGS 5 5 5 3 1 SP TABLE 5 5 5 3 2 SP2 41 2 42 THERMAL HEAD ENERGY CONTROL 5 5 5 4 MAIN MENU NO 3 SYSTEM SETTINGS 5 6 5 4 1 SP TABLE 5 6 5 4 2 SP3 1 INPUT THE PRESENT TIME 5 6 5 5 MAIN MEN...

Страница 7: ...ds 6 3 Motors 6 3 Switches 6 4 Sensors 6 4 Solenoids 6 5 Counters 6 5 Others 6 5 6 1 3 DRIVE LAYOUT 6 6 6 2 MASTER EJECT UNIT 6 7 6 2 1 OVERVIEW 6 7 Overview 6 7 Procedure 6 7 6 2 2 MASTER CLAMPER OPE...

Страница 8: ...OVERVIEW 6 22 Procedure 6 22 Notes 6 22 6 6 2 DRUM DRIVE MECHANISM 6 23 Mechanism 6 23 Notes 6 23 6 6 3 INK SUPPLY MECHANISM 6 24 Mechanism 6 24 Notes 6 24 6 6 4 INK ROLLER MECHANISM 6 25 Mechanism 6...

Страница 9: ...6 10 1 MASTER EJECT JAM E JAM LOCATION INDICATOR 6 44 Picking up the used master from the drum 6 44 Compressing the used master 6 44 Just after turning on the main switch 6 44 6 10 2 DF JAM P JAM LOC...

Страница 10: ...RT AND EXIT MECHANISM C600 9 2 4 OVERALL ELECTRICAL CIRCUIT C600 10 3 REPLACEMENT AND ADJUSTMENT C600 11 3 1 FEED UNIT REMOVAL C600 11 3 2 SEPARATION ROLLER REPLACEMENT C600 11 3 3 PICK UP ROLLER REPL...

Страница 11: ...left to right 1 1 2 ENVIRONMENTS TO AVOID 1 Locations exposed to direct sunlight or strong light more than 1 500 lux 2 Dusty areas 3 Areas containing corrosive gases 4 Locations directly exposed to c...

Страница 12: ...INSTALLATION REQUIREMENTS 31 October 2001 1 2 1 1 4 ACCESS TO THE MACHINE Place the machine near a power source providing clearance as shown below C238I000 WMF...

Страница 13: ...OCEDURE 1 2 1 MAIN BODY Accessory Check Make sure that you have all the accessories listed below Description Quantity 1 Master Spool 2 2 Paper Feed Side Pad 2 3 Operating Instructions 1 4 NECR Ricoh v...

Страница 14: ...packed with the table CAUTION Only lift with the carrying handles on the bottom corners of the machine Secure the machine on the table with the 2 screws A provided This prevents the machine from falli...

Страница 15: ...31 October 2001 INSTALLATION PROCEDURE 1 5 Installation 2 Remove the filament tape and string securing the covers and units as shown above C238I016 WMF C238I017 WMF C238I020 WMF...

Страница 16: ...ssory bag A 4 Insert both spools into a new master roll 5 Install the master roll as shown to the right 6 Insert the leading edge of the master roll under the platen roller The arrows B indicate the c...

Страница 17: ...ds 8 Set the master making unit 9 Open the door and insert a new ink cartridge D 10 Open the paper table and load a stack of paper 11 Make sure that the side plates E touch the paper gently Shift the...

Страница 18: ...end plate and adjust them to the paper size 14 Firmly insert the power plug in the outlet 15 Make sure that the wall outlet is near the machine and easily accessible 16 Turn on the main switch H 17 P...

Страница 19: ...2 2 PLATEN COVER INSTALLATION OPTION Accessory Check Check the quantity and condition of the accessories in the box against the following list Description Quantity 1 Stepped Screw 2 Installation Proce...

Страница 20: ...ntity and condition of the accessories in the box against the following list Description Quantity 1 Stepped Screw 2 2 Screws 3 3 Screwdriver 1 4 DF Exposure Glass 1 5 Decal Exposure Glass 1 6 Decal Sc...

Страница 21: ...31 October 2001 INSTALLATION PROCEDURE 1 11 Installation Installation Procedure 1 Remove the strips of tape C238I002 WMF...

Страница 22: ...ioned at the lower front side as shown 4 Peel off the backing D of the double sided tape attached to the rear side of the scale guide E then install the scale guide 2 screws removed in step 2 5 Instal...

Страница 23: ...scale decal K as shown 10 Plug in the power cord then turn the main switch on 11 Make a full size copy using the ADF Then check to make sure the side to side and leading edge registrations are correc...

Страница 24: ...tallation 1 Attach the two stabilizer brackets A to the back of the table using the thumbscrews 4 screws 2 Attach the caution label B as shown CAUTION This procedure must be done to prevent the machin...

Страница 25: ...list Description Quantity 1 Knob Screw C210 C217 C218 C219 C222 C223 C225 C228 C238 C237 and C238 only 2 2 Screw M4 x 25 C211 C212 C213 C214 C216 C224 and C226 only 2 3 Hexagon Nut M4 C211 C212 C213...

Страница 26: ...in body 4 Install the auxiliary bracket B on the tape marker with M4 x 8 screws accessories C 5 Install the tape marker on the main body with two knob screws D accessories in the two outer holes in th...

Страница 27: ...then connect the tape marker cable to the main body 5 Install the tape marker on the main body with two knob screws B accessories in the two outer holes in the tape marker bracket NOTE 1 Tighten the...

Страница 28: ...accessories 4 Reinstall the rear cover 5 Install the auxiliary bracket B on the main body with the hexagon nut D accessories as shown NOTE Install the lock washer C accessories with the nut Tape Mark...

Страница 29: ...ries in the two outer holes in the tape marker bracket NOTE 1 Tighten the knob screws with a screwdriver to prevent them from coming loose 2 Install the lock washer B accessories with the lower of the...

Страница 30: ...ll the tape marker on the main body with two knob screws A accessories in the two inner holes of the tape marker bracket NOTE 1 Tighten the knob screws with a screwdriver to prevent them from coming l...

Страница 31: ...he tape into the tape entrance until it stops as shown in the illustration E NOTE Be sure that the tape is installed in the proper direction If it is not the tape marker will not work correctly 3 Turn...

Страница 32: ...r decal to the drum case The decal must be the same color as the ink in use 4 Remove the drum unit 5 Leave the master wrapped around the removed drum to protect the drum from dust and from drying 6 Ke...

Страница 33: ...e 1 3 Screw M3 x 6 2 4 Lock Screw 2 5 Washer 2 Installation Procedure 1 Remove the rear covers A B 8 screws 2 Remove the I F connector cover C 2 screws 3 Install the I F board D accessories in CN117 E...

Страница 34: ...canner Guide Rail C C C C Dry Cloth Platen Cover White Plate C C C C Damp Cloth Exposure Glass C C C C Dry Cloth Master Feed Thermal Head C Alcohol Platen Roller C C C C Damp cloth and water Master Ej...

Страница 35: ...ch R 3 8 5 Drum Drive Gears and Cam D L L L Grease Alvania 2 Ink Pump Gears E L L L Motor Oil SAE 20 In Outside of Drum C C C C Alcohol Ink Nozzle C C C C Alcohol Others Main Drive Timing Belt Tension...

Страница 36: ...unplug the machine before attempting any of the procedures in this section NOTE This manual uses several symbols The meaning of those symbols are as follows See or Refer to screw connector E ring Cli...

Страница 37: ...2 D Rear upper cover 3 2 3 MPU Rear left cover Rear right cover 3 2 2 A MPU x 17 x 6 9 clamps CAUTION Move the RAM B from the old board to the new one so that the SP mode settings will be transferred...

Страница 38: ...tment 3 2 4 PSU Upper left cover 3 2 2 Master eject unit 3 4 1 A PSU x 5 x 2 2 clamps CAUTION When the PSU is replaced the thermal head voltage returns to the default Adjust the thermal head voltage 3...

Страница 39: ...GLASS SCALES A Left scale x 2 B Upper scale x 3 C Exposure glass 3 3 2 SBU AND LAMP STABILIZER SCANNER MOTOR Left scale Upper scale Exposure glass 3 3 1 Upper right cover 3 2 1 A SBU cover x 4 B SBU x...

Страница 40: ...Scanner motor x 2 1 spring 3 3 3 SCANNER H P SENSOR PLATEN COVER SENSOR Left scale Upper scale Exposure glass 3 3 1 Operation panel 3 2 1 Rear upper cover 3 2 2 A Platen cover sensor x 1 B Left stay...

Страница 41: ...ning in the frame Exposure glass 3 3 1 1 Left stay 3 3 3 A Platen base x 1 x 5 B Rear frame x 1 x 2 C Front frame x 5 D Exposure lamp x 1 NOTE After installing the lamp press the lamp holder E up to t...

Страница 42: ...llation 1 Wrap the new scanner wire around the pulley as shown then temporarily secure the pulley with tape 2 Re install the first scanner Then secure the first and second scanner with the scanner pos...

Страница 43: ...bracket F 10 Secure the scanner drive pulley G 1 Allen screw 11 Remove the scanner positioning pins I P N A0069104 12 Slide the scanner to the left and right several times then set the scanner positio...

Страница 44: ...t the following in the order given below SP6 10 Master writing speed 5 7 3 SP6 21 Paper registration position 5 7 3 SP6 05 Scanning speed platen 5 7 3 SP6 06 Scanning speed ADF SP6 03 Scanning start p...

Страница 45: ...MASTER EJECT 31 October 2001 3 10 3 4 MASTER EJECT 3 4 1 MASTER EJECT UNIT A Master eject unit x 3 x 2 1 clamp C238R025 WMF A...

Страница 46: ...lacement Adjustment 3 5 MASTER FEED 3 5 1 MASTER MAKING UNIT A Master making unit x 2 3 5 2 THERMAL HEAD Master making unit 3 5 1 Open the platen roller unit 1 A T H upper cover x 2 B T H side cover x...

Страница 47: ...of the thermal head 6 points 2 While fitting the tops of the springs D over the protrusions on the underside of the thermal head hook the lock pawls F of the thermal head onto the base 3 lock pawls M...

Страница 48: ...t CAUTION Never turn VR1 clockwise rapidly while the master making unit is connected The T H will be damaged if too much voltage is supplied suddenly 2 Connect the positive terminal of a circuit teste...

Страница 49: ...ster roll the core has no master Rear covers 3 2 2 1 Connect the terminals of a circuit tester to TP102 and to a grounded place e g iron base 2 Place the core of the used master roll inside the master...

Страница 50: ...ADJUSTMENT Purpose To ensure that the friction pad exerts sufficient pressure for smooth printing paper separation Default The next position to the top Adjust the paper separation pressure by looseni...

Страница 51: ...2001 3 16 3 6 3 PAPER WIDTH DETECTION BOARD Lower the paper table A Paper table x 1 x 2 B Table cover x 5 3 washers C Sensor cover x 2 D Paper width detection board x 1 x 1 C238R018 WMF C238R019 WMF...

Страница 52: ...ssible injury If the printing pressure release arms disengage the press roller will be pulled upwards suddenly Remove the drum A Press roller x 1 The bearings on the rear and front differ During insta...

Страница 53: ...osition This is when the high points of the cams on the drum flanges meet with the cam followers on both ends of the press roller To find out the correct position of the drum for the adjustment look a...

Страница 54: ...ose To make better print results without decreasing the run length Standard Within 10 0 2 mm Paper delivery unit 3 9 1 1 Adjust the distance A to 10 0 2 mm by turning the adjusting bolt B 2 Repeat the...

Страница 55: ...tection to OFF and feed paper until ink ends After finishing the required procedures in this section do not forget to return SP2 10 to the default ink detection on 3 8 2 CLOTH SCREEN Remove the drum 1...

Страница 56: ...ake sure that the correct side of the screen is facing up In addition make sure that the stays for securing the cloth screen are positioned correctly Refer to the upper right illustration When replaci...

Страница 57: ...e of the clamping plate C If it is dirty with ink the master may slip off and the image position on the prints will move toward the trailing edge of the prints during a printing run 2 Use a cloth damp...

Страница 58: ...are similar in appearance Be careful not to mix them up or use the wrong screws When installing the metal screen secure the trailing edge first with the 2 screws Then tighten the other screws while r...

Страница 59: ...ve the drum A Lower pump cover x 2 B Upper pump cover x 3 1 Remove the E ring C to free the plunger from the pump drive slider D 2 Loosen the two screws securing the holder E Do not remove the holder...

Страница 60: ...on motion is smooth 5 If the motion is stiff loosen the pump screws G and adjust the pump position 6 After tightening repeat step 4 and step 3 7 Re tighten the two screws H 8 Check that the piston mot...

Страница 61: ...WAY CLUTCH Metal screen 3 8 3 Pump covers 3 8 4 A Board cover x 2 B Front stay x 2 x 3 C Front flange D Rear stay x 2 E Rear stoppers x 1 F Ring G Rear flange H Ink roller unit I Ink roller one way cl...

Страница 62: ...r unit 3 8 5 1 Make sure that a 0 08 mm gap gauge goes through the gap A between the ink and doctor rollers and that a 0 10 mm gap gauge does not NOTE 1 The gap should be checked at both ends of the d...

Страница 63: ...on on SP6 40 Ink detection adjustment 5 7 2 3 8 8 MAIN MOTOR PULLEY POSITION After putting the pulley back on the main motor shaft refer to the above illustration for the correct position of the pulle...

Страница 64: ...1 PAPER DELIVERY UNIT A Paper delivery cover x 4 B Paper delivery unit x 3 x 2 3 9 2 DELIVERY BELT PAPER EXIT SENSOR Paper delivery unit 3 9 1 A Paper guide x 2 B Delivery belts C Vacuum fan motor x...

Страница 65: ...B in this order do not remove them Make sure that the bracket C becomes free from engagement and the cam follower D contacts the drum flange 2 Using a gap gauge measure the clearance E between the dr...

Страница 66: ...hat the bracket D becomes free from engagement and the cam follower E contacts the drum flange 3 Measure the gap F between the cam follower and cam face front drum flange It should be 0 to 0 5 mm 4 If...

Страница 67: ...ime Rear covers 3 2 2 1 Check the recess in the drum drive gear meets the positioning hole A in the bracket as shown 2 Check whether the hole B in the pump drive gear is aligned with the hole C in the...

Страница 68: ...S 3 33 Replacement Adjustment 3 10 SPECIAL TOOLS The following are the special tools used for service Description Part number Note Scanner positioning pins 4 pins as a set A006 9104 3 3 5 Flash memory...

Страница 69: ...aster eject position SN E 09 Thermal Head Thermistor Open The thermistor output voltage is over 4 9 volts Thermal head thermistor Thermal head connector E 12 Pressure Plate error The pressure plate ho...

Страница 70: ...nsor error The 2nd feed timing sensor does not activate before the paper exit timing sensor activates Drum sensors Feeler E 23 Master Eject Position Sensor Drum HP error The master eject position sens...

Страница 71: ...yed Drum Master Sensor Open The D jam indicator is lit whenever a master is made Shorted Paper Exit Sensor Open The C jam indicator is lit Shorted The B jam indicator is lit whenever a copy is made Ma...

Страница 72: ...ator will be lit Shorted The load more paper indicator is lit Cutter HP Sensor Open The cutter cuts the master only half way and the D jam indicator is lit Shorted E 01 is displayed Paper Length Senso...

Страница 73: ...e machine does not turn on but LED104 on the MPU blinks 12v CN102 9 The thermal head does not burn the master 12v CN102 8 The thermal head does not burn the master 24v CN111 3 4 5 E 13 is displayed an...

Страница 74: ...pt the main motor FU703 704 5 0 A The close the covers indicator is lit 4 3 2 LED S MPU No Function LED101 Not used LED102 Monitors the master end sensor When the sensor detects a master this LED is l...

Страница 75: ...e ink detection 5 7 2 4 3 4 DIP SWITCHES Ink detection board No Normal drum Color drum A4 black drum SW1 OFF OFF ON SW2 OFF ON OFF SW3 OFF OFF OFF SW4 OFF OFF OFF 4 3 5 TEST POINTS MPU No Function TP1...

Страница 76: ...am modes SP modes to check electrical data change operating modes and adjust values 5 1 1 ACCESSING SP MODES Entering SP Mode 1 Key in the following sequence Method 1 Hold the key down for longer than...

Страница 77: ...s counter B shows the sub menu number 3 Enter the desired value or mode using the number keys SP modes are listed in the service program tables The paper counter C shows the current setting NOTE 1 Use...

Страница 78: ...nt counter A4 L LT L L Lengthwise feeds 1 25 Print counter A4 LT 1 26 Print counter B5 L 1 27 Print counter B5 1 28 Print counter A6 L 1 29 Print counter under A6 L 1 30 Print counter other sizes 1 40...

Страница 79: ...NOTE The letters i and o are always skipped 5 2 3 SP1 80 ERROR CODE INFORMATION Purpose To display the error codes and the date By pressing the Enter key the display changes between the year the mont...

Страница 80: ...ff On Off is used for tests 2 20 Destination setting 0 Japan 1 NA 2 EU 2 21 Swap start key for print key Off Off On 2 22 Double count up for A3 masters 0 0 Not used 1 Master counter only 2 Master coun...

Страница 81: ...ptional key counter setting Off Off On 5 4 2 SP3 1 INPUT THE PRESENT TIME Input the year the month date and the time in that order Press the Enter key between each one Input the last two digits of the...

Страница 82: ...late limit sensor 4 63 ADF original trailing edge sensor 4 18 Ink detection signal 4 64 ADF original set sensor 4 19 Color drum signal 4 65 ADF original length sensor 1 4 20 Drum size signal 4 66 ADF...

Страница 83: ...er feed motor 120 rpm 5 16 Main motor 15 rpm 5 39 Registration motor 15 rpm 5 17 Main motor 30 rpm 5 40 Registration motor 30 rpm 5 18 Main motor 60 rpm 5 41 Registration motor 60 rpm 5 19 Main motor...

Страница 84: ...18 0 to100 pluses 5 7 5 6 21 Paper registration position 5 0 to 5 0 mm 5 7 3 6 30 Master making density 1 0 Pale 1 Normal 2 Dark 6 31 SBU calibration Off On Off 5 7 4 6 40 Ink detection adjustment 5...

Страница 85: ...The length of the 6 squares in the feed direction should be 130 mm as shown above 4 If it is not calculate the reproduction ratio using the following formula 130 Value 130 x 100 X X Round off to one...

Страница 86: ...canning start position ADF 1 Make copies of the test pattern printed during the previous adjustments previous page in platen mode at 90 rpm speed 3 Use the 10th print for the adjustment 2 The space be...

Страница 87: ...glass 2 Access SP6 31 and enter 1 then press the Enter key to start the auto calibration 5 7 5 SP6 20 REGISTRATION BUCKLE NOT USED Purpose To adjust the paper skew and the paper registration slippage...

Страница 88: ...s clear No No Clr 7 3 Total counter clear No No Clr 7 4 Jam Error data clear No No Clr 5 8 2 SP7 HOW TO CLEAR 1 Using the number 1 key or the scroll keys select Clr 2 Press the Enter key 3 When the cl...

Страница 89: ...MAIN FIRMWARE Purpose This upgrades the main firmware using a flash memory card 1 Before downloading new firmware check the current version with SP1 70 5 2 2 2 Prepare a flash memory card with the lat...

Страница 90: ...key Other numbers are as shown below but do not use them except the number 6 1 Grid 2 Vertical 3 Horizontal gray 4 Vertical gray 5 16 grays 6 Cross 7 Diagonal grid 8 256 grays 9 64 grays 5 9 5 SP8 21...

Страница 91: ...ead 7 Master roll 8 Paper feed roller 9 Paper pick up roller 10 Paper table 11 Registration rollers 12 Doctor roller 13 Ink roller 14 Press roller 15 Exit pawl 16 Transport belts 17 Vacuum fan motor 1...

Страница 92: ...er 2001 6 2 6 1 2 ELECTRICAL COMPONENT LAYOUT C238D003 WMF C238D004 WMF 26 27 28 30 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 31 1 2 3 6 5 4 7 9 8 10 12 11 14 15 17 18 19 20 21 22 23...

Страница 93: ...nction 12 Master Feed Motor Feeds the master to the drum 7 Cutter Motor Cuts the master 48 Registration Motor Feeds the paper to align it with the master on the drum 50 Paper Feed Motor Feeds the pape...

Страница 94: ...ensor Detects if there is a master on the drum 38 Paper Exit Sensor Detects paper misfeeds at the exit 55 2nd Feed Timing Sensor Determines the paper misfeed check timing at the paper registration are...

Страница 95: ...ont Pressure Release Solenoid Releases the press roller to apply printing pressure Counters No Component Function 25 Paper Counter Keeps track of the total number of copies 26 Master Counter Keeps tra...

Страница 96: ...er 2001 6 6 6 1 3 DRIVE LAYOUT 1 Pressure plate motor 2 Clamper motor 3 Paper delivery motor 4 Main motor 5 Registration motor 6 Table motor 7 Paper feed motor 8 Master feed motor 9 Scanner motor C238...

Страница 97: ...ster s leading edge and feed the master for 1 0 s into the master eject box C The clamper then closes The drum then turns at 30 rpm while the master eject rollers continue to feed the used master into...

Страница 98: ...y is pressed and before the clamper motor starts the master eject position sensor I is checked the drum must be at the master eject pos 2 The sensor actuators on the link C the clamper open sensor J a...

Страница 99: ...t motor turns on for 1 0 s to pick up the leading edge 2 Then the clamper motor reverses to close the clamper 3 The drum then starts turning at the slower speed 30 rpm At the same time the master ejec...

Страница 100: ...pressure plate motor turns until the actuator on the pressure plate actuates the limit sensor D 2 After master making and cutting the motor reverses until the pressure plate home position sensor C is...

Страница 101: ...ond mirror E Third mirror F Lens The exposure lamp is a xenon lamp DC 24V Light reflected off the original is directed onto a CCD via the mirrors and the lens The main scan resolution is 600 dpi becau...

Страница 102: ...d scanner s speed is half the first scanner s speed Speed increases when the scanner returns Reduction enlargement modes First scanner speed equals the drum rotation speed divided by the magnification...

Страница 103: ...The CCD line has 7 450 pixels and the resolution is 600 dpi 23 6 lines mm The A D converter in the SBU transforms the analog signals into 8 bit digital signals The MPU carries out the following proce...

Страница 104: ...r each pixel using the white plate 6 4 4 MTF FILTER The MTF filter enhances the desired image qualities The MTF filter is used in all modes Letter Letter Photo Photo and Tint This model has no SP mode...

Страница 105: ...rts each pixel value to a higher number is selected This ensures accurate generation of the 256 gray scales from black to white 6 4 7 FINE MODE Purpose Use this function to make clear prints This mach...

Страница 106: ...when replacing the thermal head or power supply unit it is necessary to readjust the applied voltage to the specific value for the thermal head Thermal head protection The thermistor on the thermal h...

Страница 107: ...them horizontal and firmly reconnect them Do not touch the connector terminals with bare hands to prevent damage from static electricity Master Platen Roller Adjust the voltage supplied to match the s...

Страница 108: ...tal Duplicators Duplicating Process Master Feeding Procedure The machine feeds the master from the master roll A The thermal head B makes an image on the master Clamper C opens The drum is at the mast...

Страница 109: ...otor feeds the master while the drum rotates intermittently at 30 rpm The intermittent rotation keeps a buckle F in the master above the master feed guide to absorb shocks from the wrapping operation...

Страница 110: ...m is stopped at the master feed position The master clamper clamps the leading edge of the new master before the drum starts to turn again The tension roller H normally presses against the master feed...

Страница 111: ...s the rear because of the two different spiral threads on the screw shaft The cutter usually cuts a master of about 550 mm in length The cutter cuts a master of about 340 mm in length when an optional...

Страница 112: ...passes through the cloth screen D Ink passes through the holes in the master that were made by the thermal head Ink reaches the paper NOTE 1 The drum is driven by the main motor and turns only clockwi...

Страница 113: ...U on the board monitors the pulses and controls the drum speed and stop positions 3 The drum has four sensors Master eject position sensor D master eject position and HP Feed start sensor E feed start...

Страница 114: ...ion converted into piston motion Supplies ink from the ink cartridge to the ink roller via the pump the shaft the tube and the ink distributor pipes C Ink drops through 4 openings D in the ink distrib...

Страница 115: ...s a one way clutch to prevent the ink roller from being turned in reverse if the drum is manually turned in reverse 2 The ink roller does not touch the metal screen when the machine is not printing 3...

Страница 116: ...e pins detect an insufficient amount of ink after activating the ink pump motor for 30 seconds a no ink condition is detected The add ink indicator on the operation panel will light 3 There is an ink...

Страница 117: ...er on the drum the black patch B is covered and the sensor detects the light reflected from the master When there is no master on the drum the black patch B is exposed The black patch does not reflect...

Страница 118: ...table is lifted The pick up roller A picks up a sheet of paper The feed roller B and the separation pad C only allow one sheet to pass The registration rollers D feed the paper The print is made NOTE...

Страница 119: ...ed roller system Handling Paper Paper Feed Paper Feed Methods Friction Pad 2 When the rollers stop and paper is fed by the registration rollers the one way clutches in the pick up and feed rollers ens...

Страница 120: ...uently occur the lever should be moved to the left or the right to adjust the pressure If non feed or multi sheet feed problems still occur the paper separation pressure can also be adjusted This shou...

Страница 121: ...gistration motor start timing is changed Registration Roller Up Down Mechanism After the printing paper is caught between the drum and the press roller the registration motor stops and the upper regis...

Страница 122: ...by tension from the springs E when the cam followers F come off the high points of the cams G During the printing cycle the solenoids stay on However if paper does not reach the registration sensor H...

Страница 123: ...table motor stops 2 When the table lower sensor F is actuated the tray has been lowered to its lower limit and the motor stops 3 During a printing run sheets are fed from the stack lowering the pick...

Страница 124: ...pinion mechanism There is a lock lever B to hold the side fences in position Side fence friction pads The two side fence friction pads C are included as accessories These are not used normally but if...

Страница 125: ...delivery unit D The paper exit sensor E is used for jam detection 6 10 6 6 8 2 PAPER DELIVERY UNIT DRIVE MECHANISM Mechanism Paper delivery motor A Belt B Shaft C Rotates the transport belts D NOTE 1...

Страница 126: ...pressed or when master cutting is finished The paper passes under the exit pawl and is delivered to the delivery table Exit pawl air pump Drive from the main motor is transmitted to the pump gear A W...

Страница 127: ...out by the drum flange the exit pawl closely approaches the drum surface due to the tension from a spring G As the master clamper approaches the exit pawl the high point of the drum flange cam C moves...

Страница 128: ...ing at regular intervals 5 mm 64 1mm 21 7 mm 550 mm Master eject position SN Feed start timing SN Paper exit timing SN Clamper close SN Clamper open SN Clamper motor Master eject motor Main motor 30 r...

Страница 129: ...he pressure plate presses turning the pressure plate motor and the clamper opens 6 After 12 0 seconds the pressure plate motor turns off 7 The machine initializes the scanner 8 When the master feed mo...

Страница 130: ...eject position SN Feed start timing SN 2nd feed timing SN Paper exit timing SN Main motor Paper feed motor Registration SN Paper exit SN Registration motor Pressure release SOL Paper delivery motor V...

Страница 131: ...e release solenoid paper delivery motor vacuum fan motor and air knife fan motor all turn on 2 When the drum is at the feed start timing sensor plus a feed delay time X the paper feed motor turns on X...

Страница 132: ...feed timign SN Paper exit timing SN Main motor Paper feed motor Registration SN Paper exit SN Registration motor Pressure release SOL Paper delivery motor Vacuum fan motor Air knife fan motor 30 rpm...

Страница 133: ...r the paper delivery motor vacuum fan motor and air knife fan motor all turn on 4 When the drum is at the feed start timing sensor plus a feed delay time X the paper feed motor and the pressure releas...

Страница 134: ...er the E jam indicator will light Compressing the used master Jam check timing When moving the pressure plate Check If the master eject sensor detects a master when the pressure plate limit sensor tur...

Страница 135: ...hts Feeding out the original Jam check timing During original feed out Check 2 When the DF has fed the original length plus 80 mm the DF registration sensor still detects the original the P jam indica...

Страница 136: ...ects a master on the black patch on the clamper then the D jam indicator lights Cutting the master cutter unit problem Jam check timing When the master is clamped in the clamper and cutting is taking...

Страница 137: ...dicator lights 6 10 4 DRUM JAM B JAM LOCATION INDICATOR Wrapping jam Jam check timing When printing Check When the drum has turned 100 degrees since the master eject position sensor turned on drum rea...

Страница 138: ...ights Turning on the main switch end of paper feed Jam check timing Just after the main switch is turned on or when paper feed has finished Check If the registration sensor detects paper the A jam loc...

Страница 139: ...1 POINT TO POINT DIAGRAM 7 1 P to P 7 POINT TO POINT DIAGRAM Location Map Section A Section B Section C Section D Section E Section F Section G Section H NOTE The symbols used in the diagrams are as f...

Страница 140: ...POINT TO POINT DIAGRAM 31 October 2001 7 2 Location Map C238S500 WMF...

Страница 141: ...31 October 2001 POINT TO POINT DIAGRAM 7 3 P to P Section A C238S501 WMF...

Страница 142: ...POINT TO POINT DIAGRAM 31 October 2001 7 4 Section B C238S502 WMF...

Страница 143: ...31 October 2001 POINT TO POINT DIAGRAM 7 5 P to P Section C C238S503 WMF...

Страница 144: ...POINT TO POINT DIAGRAM 31 October 2001 7 6 Section D C238S504 WMF...

Страница 145: ...31 October 2001 POINT TO POINT DIAGRAM 7 7 P to P Section E C238S505 WMF...

Страница 146: ...POINT TO POINT DIAGRAM 31 October 2001 7 8 Section F C238S506 WMF...

Страница 147: ...31 October 2001 POINT TO POINT DIAGRAM 7 9 P to P Section G C238S507 WMF...

Страница 148: ...POINT TO POINT DIAGRAM 31 October 2001 7 10 Section H C238S508 WMF...

Страница 149: ...x 432 mm 11 6 x 17 0 Minimum 70 x 148 mm 2 8 x 5 9 Copy Paper Weight 47 1 209 3 g m2 12 5 55 6 lb Printing Area A3 drum 290 x 410 mm 11 4 x 16 1 A4 black drum 200 x 290 mm 7 8 x 11 4 Printing Speed 60...

Страница 150: ...rating Position Sound Power Level Standby Not above 48 dB A Not above 35 dB A Copying 60 rpm Not above 74 dB A Not above 60 dB A Copying 90 rpm Not above 78 dB A Not above 63 dB A Copying 120 rpm Not...

Страница 151: ...l Registration Adjustable Range 15 mm Master Type Thermal master roll type 320 mm width 125 m roll Yield 220 masters roll Maximum run length per master 2 000 prints Master Storage Conditions Temperatu...

Страница 152: ...C 4 Recommended maximum storage period 18 months after production date Note Avoid locations exposed to direct sunlight Optional Equipment Platen cover Auto document feeder Color drum A4 black drum Tap...

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Содержание Gestetner 5428C

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Ricoh Gestetner 5428C, Руководство по обслуживанию

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Содержание Gestetner 5428C

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