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Kyocera Mita KM-1500, Service Manual

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Kyocera Mita KM-1500 Service Manual Download Page 173

2DC

2-3-13

2-3-7 Operation board

The operation board consists of key switches, LEDs and 7-segment LED.  The lighting of LEDs is determined by scan
signals (SCAN0N to SCAN5N) and LED lighting selection signals (LED0N to LED7N) from the main board. The key
switches operated are identified by the scan signals (SCAN0N to SCAN5N) and the return signals (KEY0N to KEY2N).
As an example, to light “L1”, the LED lighting selection signal (LED0N) should be driven low in synchronization with a low
level on the scan signal (SCAN0N). LEDs can be lit dynamically by repeating such operations.
As another example, if “K2” is pressed, the corresponding key switch is turned on feeding the low level of the scan signal
(SCAN1N) back to the main board via the return signal (KEY0N). The main board locates the position where the line
outputting the scan signal and the line inputting the return signal cross, and thereby determines which key switch was
operated.

Figure 2-3-12 Operator board circuit block diagram

YC1-17

YC1-16

YC1-14
YC1-13
YC1-12
YC1-11
YC1-10

YC1-9

YC1-6

YC1-5

YC1-4

YC1-3

YC1-2

YC1-1

KEY2N

KEY1N

SCAN5N

SCAN4N

SCAN3N

SCAN2N
SCAN1N
SCAN0N

LED5N

LED4N

LED3N

LED2N

LED1N

LED0N

K11

K12

K13

K14

K15

L6

L15

L24

L5

L14

L23

YC1-8

YC1-7

LED7N

LED6N

L8

L17

L26

L7

L16

L25

L4

L13

L22

L3

L12

L21

L2

L11

L19

L20

L1

L10

L18

D1

D2

D3

D4

D5

K6

K7

K8

K9

K10

YC1-15

KEY0N

K1

K2

K3

K4

K5

7-segment 

LED

Operation board

Main board

Key switches

LEDs

Summary of Contents for KM-1500

Page 1: ......

Page 2: ...URER DISPOSE OF USED BATTERIES ACCORDING TO THE MANUFACTURER S INSTRUCTIONS ATTENTION IL Y A DANGER D EXPLOSION S IL Y A REMPLACEMENT INCORRECT DE LA BATTERIE REMPLACER UNIQUEMENT AVEC UNE BATTERIE DU...

Page 3: ...sonnel to ensure the safety of their customers their machines as well as themselves during maintenance activities Service personnel are advised to read this booklet carefully to familiarize themselves...

Page 4: ...mpliance with warning messages using this symbol WARNING Serious bodily injury or death may result from insufficient attention to or incorrect compliance with warning messages using this symbol CAUTIO...

Page 5: ...or dusty place This may cause fire or electric shock Do not install the copier near a radiator heater other heat source or near flammable material This may cause fire Allow sufficient space around th...

Page 6: ...clean Dirt on them can cause abnormally high temperatures Do not remove the ozone filter if any from the copier except for routine replacement 2 Precautions for Maintenance WARNING Always remove the...

Page 7: ...t all the caution labels that should be present on the machine according to the instruction handbook are clean and not peeling Replace with new ones if necessary Handle greases and solvents with care...

Page 8: ...blems 1 5 13 1 No image appears entirely white 1 5 13 2 No image appears entirely black 1 5 13 3 Image is too light 1 5 13 4 Background is visible 1 5 13 5 A white line appears longitudinally 1 5 13 6...

Page 9: ...1 6 4 1 6 4 Removing the feed roller 1 6 5 1 6 5 Removing the MP feed roller 1 6 6 1 6 6 Removing the transfer roller 1 6 8 1 6 7 Removing the principal circuit boards 1 6 9 1 Removing the engine boar...

Page 10: ...1 ISU unit 2 1 6 2 1 3 Electrophotographic system 2 1 7 1 Electrophotographic cycle 2 1 7 1 1 Prosess unit mechanism 2 1 8 2 Main charging 2 1 9 2 1 Photo conductive drum 2 1 9 2 2 Charging the drum...

Page 11: ...80 g m2 Manual feed Capacity Bypass 50 sheets 80 g m2 Standard memory 16 MB 11 MB of bitmapping memory and 5 MB of image storage memory Approx 50 pages of memory possible with A4 6 black originals Ad...

Page 12: ...panel 5 Front top cover 6 Front cover 7 Process unit 8 Toner container 9 Lock lever 0 Toner container release lever Main charger cleaner Cassette 2 4 1 3 5 6 7 8 9 0 Paper guide Paper stopper Paper s...

Page 13: ...op Clear key 4 Copy quantity magnification display 5 Copy exposure adjustment keys 6 Image mode selection key 7 Number of Copies Zoom key 8 Number of Copies Zoom key 9 Recall Enter key 0 Reduce Enlarg...

Page 14: ...ng Ensure that the photoconductor will not be exposed to direct sunlight or other strong light when removing paper jams Avoid extremes of temperature and humidity abrupt ambient temperature changes an...

Page 15: ...Installation procedure Unpack Inisializing the copier Connect the power cord Load paper Make test copies Start Remove the pin holding scanner unit Install a toner container Remove the tapes pads and s...

Page 16: ...ation guide 5 Installation guide 6 Cleaning cloth 7 Outer case 8 Bottom pad 9 Upper pad 0 Side pad Figure 1 3 1 Unpacking 1 3 0 8 7 2 6 4 5 9 Front spacer Front pad Bottom spacer Corner support Produc...

Page 17: ...Be sure not to pull the cassette out when holding the front of the copier Be sure that the original cover is closed whenever transporting the copier DO NOT attempt to carry the copier by holding only...

Page 18: ...1 3 4 2DC 1 Remove the sheet and the two tapes 2 Open the original cover Remove the tapes pads and sheets Figure 1 3 3 Figure 1 3 4 Tapes Sheet Original cover...

Page 19: ...the nine tapes the three pads and the sheet 4 Pull the cassette out of the copier 5 Remove the pad from inside the cassette Figure 1 3 5 Figure 1 3 7 Figure 1 3 6 Tapes Tape Pad Tapes Tapes Sheet Pad...

Page 20: ...nd front cover 2 Store the pin for scanner unit on the inside of the front cover as shown in the illustration Be sure to save this pin as it is essential that it be used whenever the copier is moved T...

Page 21: ...of impact or shock The drum in the process unit is sensitive to light Never expose the drum even to normal office lighting 500 lux for more than five minutes 4 Remove the protective cardboard 5 Move t...

Page 22: ...forth five or six times so that the toner inside of it becomes evenly distributed 7 Remove the orange protective seal 8 Set the toner container into the process unit Figure 1 3 14 Figure 1 3 16 Figur...

Page 23: ...process unit 10 Push the lock lever back into its locked position 11 Set the process unit into the copier by aligning the pins on both sides of the process unit with the guides inside the copier and t...

Page 24: ...1 3 10 2DC 12 Close the front cover 13 Close the front top cover Figure 1 3 20 Figure 1 3 21 Front cover Front top cover...

Page 25: ...lay on the copier s operation panel The copier will then begin operation and a countdown of the time until the copier will be ready will be shown 900 seconds 15 minutes As the copier is carrying out t...

Page 26: ...factory setting is for A4 Letter size paper Adjusting the paper stopper for Folio or Oficio II size paper 1 Remove the stopper extension lock from the paper stopper 2 Slide the paper stopper towards...

Page 27: ...sliding the guides to fit the width of the paper being loaded in the cassette NOTES The paper sizes are marked on the bottom of the cassette The default setting is for A4 Letter size paper 4 Set the p...

Page 28: ...lines located on the paper width guides Be sure to load paper with the side to be copied onto facing down 5 Push the cassette securely all the way back into the copier until it stops Figure 1 3 32 Mak...

Page 29: ...nt processor when carrying it as shown in the illustration Be particularly careful NOT to touch the guide film or the thin white surface indicated by the A in the illustration 2 Turn the main switch t...

Page 30: ...connection cable does not get caught between the document processor and the copier when attaching the document processor to the copier 5 Gently close the document processor 6 Attached the open end of...

Page 31: ...re to tighten the pins securely when connecting the cable 7 Turn the main switch to the copier back ON Warm up will begin 1 will appear on the operation panel and the Start indicator will light when t...

Page 32: ...ion of the copier during the presence of a foreign substance may lead to fire or electric shock WARNING Turn the copier s power switch off Unplug the copier s power cable Procedure 1 Remove the one sc...

Page 33: ...he zoom keys Press the start key Press the stop clear key The maintenance item is run Press the stop clear key Enter 001 using the copy exposure adjustment keys or the zoom keys and press the start ke...

Page 34: ...original on the contact glass 15 U070 Adjusting the DP magnification 0 U071 Adjusting the DP scanning timing Adjusting leading edge registration 0 Adjusting trailing edge registration 0 U072 Adjusting...

Page 35: ...U255 Setting auto clear time 90 U258 Switching copy operation at toner empty detection Single mode U260 Changing the copy count timing After ejection U265 Setting the destination specifications 0 U33...

Page 36: ...ompletion Press the stop clear key while a selection item is displayed The indication for selecting a maintenance item No appears U001 Exiting the maintenance mode Description Exits the maintenance mo...

Page 37: ...not operate 6 Press the start key The operation starts Copy operation is simulated without paper under the set conditions When operation is complete the selected item appears 7 To stop continuous oper...

Page 38: ...ng memories Description Initializes the setting data other than that for adjustments due to variations between respective machines i e settings for counters service call history and mode settings As a...

Page 39: ...eset key Completion Press the stop clear key after operation stops The indication for selecting a maintenance item No appears U031 Checking sensors for paper conveying Description Displays the on off...

Page 40: ...input properties Description Adjusts the image scanning density Purpose Used when the entire image appears too dark or light Method Press the start key Setting 1 Change the setting using the zoom keys...

Page 41: ...the machine left and decreasing it moves the position toward the machine right 3 Press the start key The value is set Test copy mode While this maintenance item is being performed copying from an ori...

Page 42: ...operation press the stop clear key Completion Press the stop clear key when scanning stops The indication for selecting a maintenance item No appears U074 Adjusting the DP input light luminosity Desc...

Page 43: ...lighting a copy exposure indicator using the copy exposure adjustment keys Copy exposure indicator Description Exp 1 Setting the mode on off Exp 2 Setting the reference data for identifying dust Sett...

Page 44: ...duced 2 Press the start key The value is set The indication for selecting a maintenance item No appears Completion To exit this maintenance item without changing the current setting press the stop cle...

Page 45: ...e shading and displays the result oFF Performs scanning after shading and displays the result 3 Press the start key Scanning is performed under the selected conditions and the result is displayed 4 Ch...

Page 46: ...y by running the corresponding maintenance items Completion Press the stop clear key after auto adjustment is complete The indication for selecting a maintenance item No appears If the stop clear key...

Page 47: ...xposure indicator using the copy exposure adjustment keys 2 Adjust the setting using the zoom keys Copy exposure Description Setting range Initial setting indicator Exp 1 Change in density when manual...

Page 48: ...ting a maintenance item No appears U101 Setting the other high voltages Description Changes the developing bias clock and the transfer charging output timing Purpose To check the developing bias clock...

Page 49: ...ey The indication for selecting a maintenance item No appears U157 Checking clearing the developing drive time Description Displays the developing drive time for checking clearing or changing a figure...

Page 50: ...ing of paper or solve a fixing problem on thick paper Method Press the start key The screen for selecting an item is displayed Setting 1 Select the item to be set by lighting a copy exposure indicator...

Page 51: ...temperature Method 1 Press the start key CLE appears 2 Press the start key The fixing problem data is initialized Completion Press the stop clear key The indication for selecting a maintenance item N...

Page 52: ...e keys on the operation panel are pressed in order from the left to right the figure shown on the copy quantity display increases in increments of 1 If there is an LED corresponding to the key pressed...

Page 53: ...a maintenance item No appears U252 Setting the destination Description Switches the operations and screens of the machine according to the destination Purpose To return the destination setting to its...

Page 54: ...aintenance item No appears U255 Setting auto clear time Description Sets the time to return to initial settings after copying is complete Purpose To be set according to frequency of use Set to a compa...

Page 55: ...set according to user copy service provider request If a paper jam occurs frequently in the eject section when the number of copies is counted at the time of paper ejection copies are provided withou...

Page 56: ...ess the start key The current setting is displayed Setting 1 Change the setting using the zoom keys Description Setting range Initial setting Size conversion factor 0 0 to 3 0 1 0 2 Press the start ke...

Page 57: ...justment keys Image mode LED Copy exposure Copy quantity display count value group No indicator 1 Exp 1 First 3 digits of bypass copy count Exp 2 Last 3 digits of bypass copy count Exp 3 Clearing the...

Page 58: ...ing a maintenance item No appears U904 Checking clearing the service call counts Description Displays or clears the service call code counts by types Purpose To check the service call code status by t...

Page 59: ...al count Description Display the total count value Purpose To check the total count value Method 1 Press the start key 2 Change the indication of the copy quantity display by lighting a copy exposure...

Page 60: ...ount Exp 1 flashing Clearing the count CLE 2 Exp 1 lit A6 display the A6 size Exp 2 lit First 3 digits of A6 size copy count Exp 3 lit Last 3 digits of A6 size copy count Exp 1 flashing Clearing the c...

Page 61: ...e clearing on Executing the clearing 3 Press the start key The accounting counter is cleared Completion To exit this maintenance item without clearing the data press the stop clear key The indication...

Page 62: ...Outputting a VTC PG pattern Description Selects and outputs a VTC PG pattern created in the copier Purpose When performing respective image printing adjustments used to check the machine status apart...

Page 63: ...remove paper jammed in the copier open the face up output tray front top cover front cover or pull the drawer out To remove original jammed in the DP open the DP original cover Paper misfeed detectio...

Page 64: ...2DC 1 5 2 2 Paper misfeed detection conditions Registration sensor Exit sensor Figure 1 5 2...

Page 65: ...turned off for 1 s and turned back on once but the sensor again fails to turn on within 1120 ms Registration sensor does not turn on within 1160 ms of the feed clutch turning on the clutch is then suc...

Page 66: ...ch malfunctions Electrical problem with the feed clutch Check visually and remove it if any Run maintenance item U031 and turn registration sensor on and off manually Replace registration sensor if in...

Page 67: ...extremely dirty or de formed Check if the separators are dirty or deformed Check visually and replace any deformed roller Run maintenance item U031 and turn registration sensor on and off manually Re...

Page 68: ...n tact each other Check if the upper exit roller and exit pulleys con tact each other Run maintenance item U031 and turn registration sensor on and off manually Replace registration sensor if indicati...

Page 69: ...g pulley or feed pulley is dirty with pa per powder The conveying roller and conveying pulleys do not contact correctly The exit roller and exit pul leys do not contact cor rectly Remove any found Run...

Page 70: ...fective main board KP 5060 or engine board KP 5061 Poor contact in the connector ter minals Defective main board KP 5060 or engine board KP 5061 Replace the main board KP 5060 and check for correct op...

Page 71: ...n motor rotation control circuit Defective drive transmission sys tem Poor contact of the connector ter minals Defective scanner home position sensor Defective engine board KP 5061 or scanner board KP...

Page 72: ...ct in the polygon motor connector termi nals Defective polygon motor Defective engine board KP 5061 Defective laser diode Defective polygon motor Defective main board KP 5060 Replace the scanner board...

Page 73: ...nector ter minals Defective power supply board KP 5059 Defective engine board KP 5061 Check the connection of connector CN4 on the power supply board KP 5059 and the continuity across the connector te...

Page 74: ...ive external temperature ther mistor Poor contact in the operation board connector terminals Defective external temperature ther mistor Defective waste toner sensor Defective engine board KP 5061 Defe...

Page 75: ...1 5 16 7 A black line appears laterally See page 1 5 16 8 One side of the copy image is darker than the other See page 1 5 16 9 Black dots appear on the image See page 1 5 17 10 Image is blurred See p...

Page 76: ...board KP 5061 E Defective high voltage board 2 Exposure lamp fails to light A The connector terminals of the exposure lamp make poor contact B Defective CCD board KP 5065 C Defective scanner board KP...

Page 77: ...kground is visible Causes 1 Insufficient toner 2 Deteriorated developer 3 Dirty or deteriorated drum Causes Check procedures corrective measures 1 Insufficient toner 2 Deteriorated developer 3 Dirty o...

Page 78: ...ures corrective measures 1 Dirty main charger wire 2 Defective exposure lamp Causes Check procedures corrective measures 1 Flawed drum 2 Dirty developing section 3 Leaking main charger housing 7 A bla...

Page 79: ...Deformed or worn cleaning blade Causes Check procedures corrective measures 1 Dirty or flawed drum 2 Dirty contact glass 3 Deformed or worn cleaning blade Causes 1 Deformed press roller 2 Paper conve...

Page 80: ...Replace the paper 3 Flawed drum Replace the process unit 13 Offset occurs 12 Paper creases Causes 1 Paper curled 2 Paper damp Causes Check procedures corrective measures 1 Paper curled Check the paper...

Page 81: ...rocedures corrective measures 1 Misadjusted center line of image printing Readjust the center line of image printing see pages 1 6 42 2 Misadjusted scanner center line Readjust the scanner center line...

Page 82: ...ain switch Check for continuity If none remove the cause of blowing and replace the fuse Check for continuity across the contacts of switch If none re place the switch With AC present check for 24 V D...

Page 83: ...ty across the coil If none replace the registra tion clutch Reinsert the connector Also check for continuity within the con nector cable If none remedy or replace the cable Run maintenance item U032 a...

Page 84: ...round registration snsor or exit sensor Defective registration sen sor Defective exit sensor Poor contact in the con nector terminals of inter lock switch Defective interlock switch Wiring is broken s...

Page 85: ...and MP feed roller are dirty with paper powder Check if the feed roller and MP feed roller are deformed Electrical problem with the feed clutch and MP feed clutch Check if the surfaces of the upper a...

Page 86: ...nly the specified parts to replace the fixing unit thermostat Never substitute electric wires as the copier may be seriously damaged Do not perform aging without the waste toner tank installed during...

Page 87: ...container out of the copier Figure 1 6 1 Removing the process unit CAUTIONS After removing the process unit seal it in the protective bag and place it on flat surface Do not place the process unit in...

Page 88: ...crew and then remove the rear cover Figure 1 6 2 Removing the memory cover and rear cover 3 While unlatching the two latches and then remove the front top cover face down output tray Latches Front top...

Page 89: ...3 3 Unlatch the snaps and hook remove the right cover Figure 1 6 4 Removing the right cover 3 Removing the left cover 1 Remove the front top cover face down output tray See page1 6 3 2 Unlatch the sna...

Page 90: ...the D cut shaft into the D shape hole of the feed roller 1 Remove the paper cassette and the process unit See page 1 6 2 2 Stand the machine the front side up 3 Move the feed roller in the direction A...

Page 91: ...roller 1 Remove the engine board See page 1 6 9 2 Remove one screw 3 Remove the grounding plate 4 Remove one stop ring 5 Remove the MP feed clutch Figure 1 6 7 Removing the MP feed clutch Screw Groun...

Page 92: ...pressing the latch by using the driver and then remove the MP feed unit Figure 1 6 8 Removing the MP feed unit 10 Remove the stop ring and then remove the MP feed roller Latch Screw Toner sensor Spri...

Page 93: ...ings make sure to refit the black colored bush and spring on the left side Also observe the correct direction to which the bush is fit in reference to the paper passing direction 1 Remove the process...

Page 94: ...ht cover See pages1 6 4 2 Remove all twelve connectors from the engine board 3 Remove three screws 4 Remove the engine board When replacing the board with a new board remove the EEPROM from the old bo...

Page 95: ...three connectors 3 Remove the one flexible flat cable 4 Remove the seven screws and then remove the main controller shield with main board Figure 1 6 12 Removing the main controller shield with main...

Page 96: ...move two screws at the back of the main board When replacing the board with a new board remove the EEPROM from the old board and mount it to the new board Figure 1 6 13 Removing the main board Screws...

Page 97: ...om the power supply board 4 Remove eight screws 5 Remove the power supply board and high voltage board Note The high voltage board is directly connected to the bias board 6 Separate the high voltage b...

Page 98: ...y board and high voltage board See the previous page 4 Stand the machine with the front side up 5 Remove one connector from the bias board 6 Remove five screws 7 Remove the bottom cover 8 Remove the t...

Page 99: ...1 Remove the cassette and process unit See page 1 6 2 2 Remove the right cover See pages 1 6 4 3 Remove three connectors from the main motor 4 Remove four screws 5 Remove main motor Figure 1 6 16 Remo...

Page 100: ...Remove the engine board See page 1 6 9 7 Remove wires from wire saddles on the cord cover 8 Remove one screw 9 Remove the cord cover Figure 1 6 17 Removing the cord cover Wire saddles Wire saddle Cord...

Page 101: ...ve one screw and then remove the feed clutch 13 Remove three stop rings 14 Remove MP feed clutch gear feed clutch gear and registration clutch gear Figure 1 6 18 Removing the clutches Stop ring Stop r...

Page 102: ...2DC 1 6 17 15 Remove the four screws 16 Remove the drive unit Figure 1 6 19 Removing the drive unit Screws Drive unit...

Page 103: ...e the fuser unit gear and the copier s drive gear are properly meshed with each other For this rotate the main motor several turns before fixing screws 1 Remove the rear cover See page 1 6 3 2 Remove...

Page 104: ...2DC 1 6 19 6 Remove two screws 7 Open and split the fuser unit Figure 1 6 21 Splitting the fuser unit Screw Screw Fuser unit...

Page 105: ...tantial period of time until it cools down 1 Remove and split the fuser unit See page 1 6 18 2 Loosen the stopper screws 3 Hold the separation claw upright and remove the separation claw and separatio...

Page 106: ...urface can prevent proper fusing of toner on paper When holding When refitting the heater lamp direct the short distance side from the projection in the middle of the lamp facing the machine s left si...

Page 107: ...ial period of time until it cools down 1 Remove and split the fuser unit See page 1 6 18 2 Remove the heater lamp See previous page 3 Press the lamp A holder away from the heat roller Pull up both hea...

Page 108: ...2DC 1 6 23 4 Remove the heat gear Z33 heat R bush and heat L bush from the heat roller Figure 1 6 25 Removing the heat roller Heat gear Z33 Heat R bush Heat L bush Heat roller...

Page 109: ...tor 1 Remove and split the fuser unit See page 1 6 18 2 Remove the heater lamp See page 1 6 21 3 Remove the heat roller See page 1 6 22 4 Remove one screw 5 Remove the thermistor Figure 1 6 26 Removin...

Page 110: ...ls of the thermal cutout 1 Remove and split the fuser unit See page 1 6 18 2 Remove the heater lamp See page 1 6 21 3 Remove the heat roller See page 1 6 22 4 Remove the two screws 5 Remove the therma...

Page 111: ...extremely hot immediately after the copier was running Allow substantial period of time until it cools down 1 Remove and split the fuser unit See page 1 6 18 2 Remove the press roller from the fuser u...

Page 112: ...r See page 1 6 4 2 Remove the five connectors and two flexible flat cables from the scanner board 3 Remove the five screws and then remove the scanner board Screws Screws Screw Scanner board Connector...

Page 113: ...2DC 1 6 28 4 Remove the two screws 5 Slide the scanner unit and then remove the scanner unit Scanner unit Screws Figure 1 6 30 Removing the scanner unit...

Page 114: ...move two grounding plates 3 Remove each two screws and then remove the right and left scanner stays Figure 1 6 31 Removing the right and left stays 4 Remove four connectors 5 Remove six screws and the...

Page 115: ...t Conncetor 1 2 3 6 Remove three screws 7 Remove two connectors from the laser scanner unit 8 Remove the laser scanner unit When refitting the laser scanner unit tighten a screw in order of 3 from 1 F...

Page 116: ...2DC 1 6 31 Eraser lamp 9 Remove the eraser lamp 5 2 34 Removing the eraser lamp...

Page 117: ...driver through the holes and then remove the operation unit Hook Hole Hole Operation unit Hook Figure 1 6 35 Removing the operation unit 2 Remove two screws and then remove the original holder cover...

Page 118: ...5 Remove the flexible flat cable from the ISU board s connector 6 Remove the scanner belt from the belt hook of scanner unit 7 Remove the ISU unit from the scanner shaft Remove the ISU unit taking car...

Page 119: ...from the inverter board 3 Remove the one screw and then remove the inverter board Screw Connectors Inverter board ISU unit ISU unit Exposure lamp mount Hook Figure 1 6 39 Removing the inverter board 4...

Page 120: ...les Exposure lamp Exposure lamp mount 5 Remove the exposure lamp and cables from the exposure lamp mount Do not touch the glass surfaces of the exposure lamp with bare hands Figure 1 6 41 Removing the...

Page 121: ...t See page 1 6 32 2 Remove the exposure lamp See page 1 6 34 3 Unhook the two mirror A holders and then remove the scanner mirror A Scanner mirror A Scanner mirror A Hook Mirror A holder Scanner mirro...

Page 122: ...he scanner board Figure 1 6 43 Removing the scanner motor 1 4 Remove two screws and then remove two grounding plates Figure 1 6 45 Removing the scanner motor 3 Connector Scanner board Screws Scanner b...

Page 123: ...Stopper ring Scanner shaft Figure 1 6 47 Removing the scanner motor 5 Figure 1 6 46 Removing the scanner motor 4 8 Remove the one stopper ring and then detach the scanner shaft Detach the shaft takin...

Page 124: ...ble Cable clamps 9 Remove the cable from the cable clamps 10 Remove the four screws and then remove the scanner motor mount with scanner motor Figure 1 6 48 Removing the scanner motor 6 11 Remove the...

Page 125: ...om the copier See page 1 6 2 2 Unlatch the three snaps and remove the main charger cap 3 Draw the main charger unit in the direction of arrow A then pull it out in the direction of arrow B Figure 1 6...

Page 126: ...tting range 3 0 3 0 Initial setting 0 0 Changing the value by 1 moves the leading edge by 1 0 mm Press the start key to output a test pattern Exp 1 lit Leading edge registration from the drawer Exp 2...

Page 127: ...y 1 moves the center line by 1 mm Select the item to be adjusted using the copy exposure adjustment keys Exp 3 lit Center line from the drawer Exp 1 flashing Center line from the bypass tray Exp 2 fla...

Page 128: ...e start key to output a test pattern Press the start key The new setting is stored Setting range initial setting change in value per step Printer leading edge margins 0 10 3 0 0 5 mm Printer left righ...

Page 129: ...e value the larger the amount of slack the smaller the value the smaller the amount of slack The new setting is stored Select the item to be adjusted using the copy exposure adjustment keys Is the lea...

Page 130: ...Copy example Copy example 2 Figure 1 6 55 Enter maintenance mode Enter 065 using the copy exposure adjustment keys or zoom keys Yes No Start End Press the program key and the machine enters the test c...

Page 131: ...py example 2 decrease the value using the zoom key Press the start key The new setting is stored Press the start key Select Exp 2 auxiliary scanning direction using the copy exposure adjustment keys E...

Page 132: ...t Enter maintenance mode Enter 066 using the copy exposure adjustment keys or zoom keys Press the start key Press the program key and the machine enters the test copy mode Place an original and press...

Page 133: ...adjustment keys or zoom keys Press the start key Press the program key and the machine enters the test copy mode Place an original and press the start key to make a test copy Is the scanner center lin...

Page 134: ...ter maintenance mode Enter 403 using the copy exposure adjustment keys or zoom keys Press the start key Exp 1 lit Scanner left margin Exp 2 lit Scanner leading edge margin Exp 3 lit Scanner right marg...

Page 135: ...No Start End Press the stop clear key to exit maintenance mode Is the image correct Enter 070 using the copy exposure adjustment keys or zoom keys Press the program key and the machine enters the tes...

Page 136: ...ustment keys or zoom keys Yes No Start End For copy example 1 decrease the value using the zoom key For copy example 2 increase the value using the zoom key Press the program key and the machine enter...

Page 137: ...an original on the DP and make a test copy Is the image correct Setting range 42 32 Initial setting 0 Changing the value by 1 moves the copy image by 0 254 mm Press the start key The new setting is s...

Page 138: ...e mode Place an original on the DP and make a test copy Yes No Start End Change the setting For copy example 1 increase the value using the zoom key For copy example 2 decrease the value using the zoo...

Page 139: ...es No Start Enter maintenance mode Enter 404 using the copy exposure adjustment keys or zoom keys Press the start key Exp 1 lit DP left margin Exp 2 lit DP leading edge margin Exp 3 lit DP right margi...

Page 140: ...sert the power plug and turn the power switch on 5 The upgrade operation starts and the Copy quantity magnification display changes as follows JIG 1 99 6 When the upgrade operation is complete the che...

Page 141: ...tray as manipulated by the user The figure below shows the components in the paper feeding system and the paths through which the paper travels The sensors clutches etc are described in the following...

Page 142: ...eed clutch MP feed clutch Registration sensor Registration clutch Engine board Main motor EXITN MOTORN RESDRN RESIT PAPERN MPFDRN FEDDRN HANDSN YC7 10 YC8 10 YC5 2 YC4 1 YC9 2 YC4 9 YC6 2 YC8 8 1 MP f...

Page 143: ...ransfer roller Driving power train 1 Main motor gear 2 Registration clutch 3 MP feed clutch 4 Feed clutch 5 MP feed roller 6 Feed roller 7 Registration gear Z13 8 Registration gear Z20 9 Gear 53 0 Low...

Page 144: ...Original holder 2 Scanner upper frame 3 Scanner lower frame 4 Contact glass 5 DP Contact glass 6 Scanner rail 7 Scanner motor mount 8 Tension pulley mount 9 Scanner belt 0 Scanner motor Tension pulle...

Page 145: ...2 YC11 10 YC11 11 YC11 12 YC1 5 YC1 14 YC1 12 YC1 10 YC1 8 YC1 6 YC1 18 YC1 20 YC1 22 YC1 29 30 CN11 1 CN11 4 Scanner board Engine board Main board Inverter board Exposure lamp ISU unit Scanner unit C...

Page 146: ...nput through reflection by the three mirrors and through the ISU lens to the CCD image sensor on the CCD board The CCD image sensor scans one row of the image in the main scan direction converts it to...

Page 147: ...ides technical details on the copier s electrophotography system 1 Electrophotographic cycle The electrophotography system of the copier performs a cyclic action made of six steps as follows Each step...

Page 148: ...in unit C For main unit Transfer roller D For toner container 1 Main charger unit 2 Charger wire 3 Grid 4 Developing roller 5 Gear Z14 Z18 6 Gear Z14 Z36 7 Gear Z18 Z36 8 Free gear Z40 9 Gear Z18 Z35H...

Page 149: ...ch as a screwdriver etc resulting in a print quality problem Also finger prints can cause deterioration of the OPC layer therefore the drum in the process unit must be handled with care Substances lik...

Page 150: ...ate its photoconductive layer is given a uniform positive corona charge dispersed by the main charger wire B Due to high voltage scorotron charging the charging wire can get contaminated by oxidizatio...

Page 151: ...anner unit B Figure 2 1 11 Exposure The laser beam 780 nm wavelength beam is dispersed as the polygon motor polygon mirrors revolves to reflect the laser beam over the drum Various lenses and mirror a...

Page 152: ...ence each mirror corresponding to one scanned line width on the drum when laser beam scans on it 4 F theta lens The f theta lens equalizes focusing distortion on the far ends of the drum 5 Sensor mirr...

Page 153: ...electrical resistance of the photoconductor is reduced and the potential on the photoconductor is also lowered Resulted on the drum surface is an electrostatic image which represents the data to print...

Page 154: ...The developing roller A is applied with the AC weighted positive DC power source Toner E on the developing roller A is given a positive charge The positively charged toner E is then attracted to the a...

Page 155: ...and the transfer roller Figure 2 1 15 Transfer The nominal transfer bias is set to approximately 1 8 kV limit with the 6 mA current Since the ideal potential of the transfer bias depends on the thickn...

Page 156: ...cratch the roller surface as doing so may result in print problems The heat roller has four claws which are continuously in contact with its surface These claws prevent the paper on which toner has be...

Page 157: ...igure 2 1 17 Fuser unit mechanism 0 1 2 3 4 5 6 7 8 9 1 Heat roller 2 Idle gear Z34 3 Exit gear Z23 4 Idle gear Z18 5 Heat gear Z33 6 Press roller 7 Heater lamp 8 Thermal cutout 9 Separator s 0 Thermi...

Page 158: ...e toner container into the waste toner reservoir D Figure 2 1 18 Drum cleaning and erasing static charge After the drum B is physically cleaned it then must be cleaned to the electrically neutral stat...

Page 159: ...witch 5 Bias board KP 5067 E Cassette switch F Registration sensor G Paper sensor 6 Main motor 7 Cooling fan 8 Registration clutch 9 Feed clutch 0 MP feed clutch MP paper sensor Toner sensor PWB KP 78...

Page 160: ...2 2 2 2 Scanner unit 1 Operation board 2 CCD board KP 5065 3 Scanner board KP 5063 4 Inverter board 5 Scanner home position sensor 6 Scanner motor 7 Exposure lamp Figure 2 2 2 Scanner unit 2 4 6 3 5...

Page 161: ...connector CPUA23 21 DBRXD EEDIO KEYON KEY1N EY2N SCANON SCAN1N SCAN2N SCAN3N SCAN4N SCAN5N LEDON LED1N LED2N LED3N LED4N LED5N LED6N BUZERDRN EEPROM Operator panel I F Scanner I F EESCL DBTXD CODE DIM...

Page 162: ...MHVDR THVDR RTHDR HVISEL HVCLK Regist ration sensor Paper sensor MP paper sensor 5 V DC output circuit TNFULL TONER SLEEP EXITN ZCROSS HEATN THERMA FAN1 RESIT Main motor Engine board KP 5061 CPU U1 E...

Page 163: ...pplies to the eraser lamps The eraser lamps thus illuminate as the current flows through the eraser lamp the pin 2 of connector YC14 resistors R109 R110 and R111 transistor Q18 and the ground GND PGND...

Page 164: ...ansition of alternating plus and negative current and detects the zero crosses This detector derives the resultant ZCROSS signal at its pin 43 of the engine CPU U1 Since abrupt change in the current f...

Page 165: ...as the heater lamp is energized for the 6 positive and negative envelops out of 10 The duty cycle is 0 since the heater lamp is kept turned off for the whole envelops CPU U1 selectively switches among...

Page 166: ...n On On On On On On On On On On Off Off On On Off On On Off On On Off Off On Off Off Off Off Off Off Off Off Off Off Off Off On Off Off On On Off Off Variation No 4 Duty 40 Variation No 5 Duty 0 Heate...

Page 167: ...When PLL control IC IC1 finds that the polygon motor is revolving at the rated speed turns PLGDRN to L level to acknowledge the engine CPU that the rated speed has been achieved On the contrary if PL...

Page 168: ...g Over current detection circuit Power switch Current fuse Noise filter circuit Transformer T1 24 V DC rectifier smooth ing circuit 24 V DC shutoff circuit Over voltage detection circuit Photo coupler...

Page 169: ...he toner sensor Figure 2 3 8 Bias board circuit block diagram Developing roller Bias board KP 5067 Engine board Regist ration sensor Developing bias output circuit FAN1 FAN FAN2 PAPERN SWIN RESIT TONE...

Page 170: ...engine board Figure 2 3 9 High voltage board circuit block diagram Control and driver circuit Transfer bias output positive voltage circuit MHVDR THVDR RTHVDR PSEL1 PSEL2 HVISEL 24V2 24V2 24V2 24V3 2...

Page 171: ...er supply board is disconnected deactivating the high voltage output laser output main motor output for safety The cooling fan is an exception Since the cooling fan is directly fed with 24 V DC from t...

Page 172: ...SW SWN CPN and RSN based on the clock for driving the CCD sensor CCDCLK supplied from the main board through the scanner board The image signals obtained from scanning of an original are divided into...

Page 173: ...corresponding key switch is turned on feeding the low level of the scan signal SCAN1N back to the main board via the return signal KEY0N The main board locates the position where the line outputting t...

Page 174: ...oard CCD board and optional document processor Figure 2 3 13 Scanner board circuit block diagram Operation board Inverter board Scanner board Optional DP Main board Engine board Driver circuit U1 Expo...

Page 175: ...48 ms 99 ms OVSYNC HPSWN MOTA MOTNA MOTB MOTNB MOTORN MHVDR HVCLK FEDDRN REGDRN RESIT EXITN ERASERN RTHVDR THVDR PSEL1 PSEL2 HVISEL YC3 4 YC10 4 YC11 1 2 3 4 YC4 9 YC8 5 YC7 7 YC4 1 YC6 2 YC8 8 YC7 10...

Page 176: ...ms 116 ms OVSYNC HPSWN MOTA MOTNA MOTB MOTNB MOTORN MHVDR HVCLK FEDDRN REGDRN RESIT EXITN ERASERN RTHVDR THVDR PSEL1 PSEL2 HVISEL YC3 4 YC10 4 YC11 1 2 3 4 YC4 9 YC8 5 YC7 7 YC4 1 YC6 2 YC8 8 YC7 10...

Page 177: ...325 ms 275 ms 116 ms OVSYNC HPSWN MOTA MOTNA MOTB MOTNB MOTORN MHVDR HVCLK FEDDRN REGDRN RESIT EXITN ERASERN RTHVDR THVDR PSEL1 PSEL2 HVISEL YC3 4 YC10 4 YC11 1 2 3 4 YC4 9 YC8 5 YC7 7 YC4 1 YC6 2 YC...

Page 178: ...ZCROSS HVCLK 5V 5V 5V SGND SGND SGND FAN 5V TONER SGND THERM 5V 24V3 24V3 PGND PGND PAPERN SWIN RESIT TONEREPY 24V2 MHVDR FAN2 FAN1 THVDR THERM 24V2 PGND PFMDRN PFCLK PFPFPER PFSEN 24V3 FEDDRN FEDDRN...

Page 179: ...119 Wood Dale Illinois 60191 TEL 630 238 9982 FAX 630 238 9487 Western Region 14101 Alton Parkway Irvine California 92618 7006 TEL 949 457 9000 FAX 949 457 9119 Southeastern Region 1500 Oakbrook Driv...

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