Panasonic KX-MB283BR Service Manual
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Panasonic KX-MB283BR Service Manual

Panasonic KX-MB283BR Service Manual

Multi-function printer
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Multi-Function printer
KX-MB283BR
(for Brazil)
© 2007 Panasonic Communications Co., Ltd. All
rights reserved. Unauthorized copying and distribu-
tion is a violation of law.
ORDER NO. KMF0711134CE

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  • Page 1 ORDER NO. KMF0711134CE Multi-Function printer KX-MB283BR (for Brazil) © 2007 Panasonic Communications Co., Ltd. All rights reserved. Unauthorized copying and distribu- tion is a violation of law.

  • Page 2: Table Of Contents

    KX-MB283BR TABLE OF CONTENTS PAGE PAGE 1 Safety Precautions -----------------------------------------------3 12 Service Fixture & Tools-------------------------------------- 154 1.1. FOR SERVICE TECHNICIANS ------------------------3 13 Disassembly and Assembly Instructions ------------- 155 1.2. AC CAUTION -----------------------------------------------3 13.1. ADF SECTION ------------------------------------------ 156 1.3. PERSONAL SAFETY PRECAUTIONS --------------4 13.2.

  • Page 3: Safety Precautions

    KX-MB283BR 1 Safety Precautions 1. Before servicing, unplug the AC power cord to prevent an electric shock. 2. When replacing parts, use only the manufacturer's recommended components. 3. Check the condition of the power cord. Replace if wear or damage is evident.

  • Page 4: Personal Safety Precautions

    KX-MB283BR 1.3. PERSONAL SAFETY PRECAUTIONS 1.3.1. MOVING SECTIONS OF THE UNIT Be careful not to let your hair, clothes, fingers, accessories, etc., become caught in any moving sections of the unit. The moving sections of the unit are the rollers and a gear. There is a separation roller and a document feed roller which are rotated by the document feed motor.

  • Page 5: Warning

    KX-MB283BR 2 Warning 2.1. ABOUT LEAD FREE SOLDER (PbF: Pb free) Note: In the information below, Pb, the symbol for lead in the periodic table of elements, will refer to standard solder or solder that con- tains lead. We will use PbF solder when discussing the lead free solder used in our manufacturing process which is made from Tin, (Sn), Silver, (Ag), and Copper, (Cu).

  • Page 6: Insulation Resistance Test

    KX-MB283BR 2.3. INSULATION RESISTANCE TEST 1. Unplug the power cord and short the two prongs of the plug with a jumper wire. 2. Turn on the power switch. 3. Measure the resistance value with an ohmmeter between the jumpered AC plug and each exposed metal cabinet part (screw heads, control shafts, bottom frame, etc.).

  • Page 7: Specifications

    KX-MB283BR 3 Specifications Applicable Lines: Public Switched Telephone Network Document Size: Max. 216 mm in width Max. 600 mm in length Effective Scanning Width: 208 mm Effective Printing Width: Letter/ Legal: 208 mm A4: 202 mm Transmission Time*: Approx. 4 s/page (ECM-MMR Memory transmission)**...

  • Page 8: General/Introduction

    KX-MB283BR 4 General/Introduction 4.1. OPTIONAL ACCESSORIES Model No. Description Specifications KX-FAT92A Replacement toner cartridge 1 toner cartridge KX-FAD93A Replacement drum unit 1 drum unit...

  • Page 9: Translation Lists

    KX-MB283BR 4.2. Translation Lists 4.2.1. Error Message (Display)

  • Page 10: Features

    KX-MB283BR 5 Features 5.1. General Features General 250-sheet paper capacity (60 g/m ~ 75 g/m • LCD (Liquid Crystal Display) readout Distinctive ring detection. Plain Paper Facsimile Machine Large Memory... Performed by DRAM Output tray (approx. 150 sheets) Approx. 150 pages of memory transmission Letter/A4/Legal, G3 compatible Approx.

  • Page 11: Technical Descriptions

    KX-MB283BR 6 Technical Descriptions 6.1. CONNECTION DIAGRAM...

  • Page 12: General Block Diagram

    KX-MB283BR 6.2. GENERAL BLOCK DIAGRAM MAIN UNIT SOC (IC300) This custom IC is used for general MFP operations. ARM9 operating at 250MHz. SDRAM Controller Controls SDRAM Memory. USB Controller with PHY Apply to USB2.0 HS Scanner I/F Controls the CIS and AFE, and process the scan images.
  • Page 13 KX-MB283BR...

  • Page 14: Main Board Section

    KX-MB283BR 6.3. MAIN BOARD SECTION 6.3.1. Data Flow [PC Scan] 1. An analog image data is output from CISunit to IC503. IC503 decode the analog data to digital data, and output to IC300. Scanner I/F in IC300 process image data and store it in IC400 through SDRAM I/F.
  • Page 15 KX-MB283BR [Copy] 1. An analog image data is output from CISunit to IC503. IC503 decode the analog data to digital data, and output to IC300. Scanner I/F in IC300 process image data and store it in IC400 through SDRAM I/F.
  • Page 16 KX-MB283BR Description of Pin Distribution (IC300) SOC (System On Chip) PIN NO. PinName POWER SUPPLY VOLTAGE EXPLANATION LEDONB 3.3V SCANNER INTERFACE NCCDON 3.3V SCANNER INTERFACE AFEMCLK 3.3V SCANNER INTERFACE NCCDCP 3.3V NOT USED CCDCLK 3.3V NOT USED PIO29 3.3V OPERATION PANEL INTERFACE PIO57 3.3V...
  • Page 17 KX-MB283BR PIN NO. PinName POWER SUPPLY VOLTAGE EXPLANATION AC26 BSPCLK 3.3V NCU INTERFACE AD01 SDMD14 3.3V SDRAM DATA BUS 14 AD02 SDMD15 3.3V SDRAM DATA BUS 15 AD03 AD04 NBATRST 3.3V BATTERY RESET INPUT AD05 VDD2RTC 1.2V POWER SUPPLY AD06 3.3V...
  • Page 18 KX-MB283BR PIN NO. PinName POWER SUPPLY VOLTAGE EXPLANATION AF16 USBXOUT 3.3V CRYSTAL(12MHz) OUTPUT AF17 LSI_TMS 3.3V NOT USED AF18 LSI_TCK 3.3V NOT USED AF19 LSI_CW_TAP 3.3V NOT USED AF20 PSCIO0 3.3V INPUT PORT (REGIST) AF21 PSCIO4 3.3V NOT USED AF22 PSCIO12 3.3V...
  • Page 19 KX-MB283BR PIN NO. PinName POWER SUPPLY VOLTAGE EXPLANATION VDD1.2 1.2V POWER SUPPLY PIO32 3.3V OPERATION PANEL INTERFACE CRMPWR 3.3V MOTOR CURRENT CONTROL PIO56 3.3V ADF MOTOR INTERFACE VDD1.2 1.2V POWER SUPPLY PIO48 3.3V FAN2 CONTROL PIO44 3.3V DC MOTOR INTERFACE VDD3.3...
  • Page 20 KX-MB283BR PIN NO. PinName POWER SUPPLY VOLTAGE EXPLANATION PIO40 3.3V NOT USED PIO39 3.3V NOT USED SDMD24 3.3V SDRAM DATA BUS 24 SDMD25 3.3V SDRAM DATA BUS 25 SDMA1 3.3V SDRAM ADDRESS BUS 1 SDMAÇO 3.3V SDRAM ADDRESS BUS 0 PIO37 3.3V...
  • Page 21 KX-MB283BR PIN NO. PinName POWER SUPPLY VOLTAGE EXPLANATION PIO13 3.3V NOT USED PIO12 3.3V NOT USED PIO14 3.3V NOT USED PIO15 3.3V NOT USED SDMD0 3.3V SDRAM DATA BUS 0 SDMD1 3.3V SDRAM DATA BUS 1 NSDCAS 3.3V SDRAM CAS NSDRAS 3.3V...
  • Page 22 KX-MB283BR 6.3.2. RTC BACKUP CIRCUIT 1. Function This unit has a lithium battery (BAT300) which works for the Real Time Clock IC (RTC: inside IC300). The RTC continues to work, backed up by a lithium battery even when the power switch is OFF.

  • Page 23: Cis Control Section

    KX-MB283BR 6.4. CIS CONTROL SECTION The scanning block of this device consists of a control circuit and a CIS (contact image sensor), and AFE (Analog Front End) include A/D Converter. When an original document is inserted and the start button pressed, pin A3 of IC300 goes to a low level and the transistor Q518 turns on.

  • Page 24: Motor Drive Section

    KX-MB283BR 6.5. MOTOR DRIVE SECTION 6.5.1. Engine Motor Control Circuit 1. Functions All driving forces of printer engine part are supplied by this engine motor. Engine motor is controlled so as to rotate at constant speed during printing and copying.
  • Page 25 KX-MB283BR <Stop operation> In order to stop the motor rotation, following 2 signals are supplied from IC300. 1. SS signal (Output pin: Pin B12/Output Signal: "L") When this signal is inverted by transistor Q502 and becomes "H", motor recognize this signal as "stop" signal.
  • Page 26 KX-MB283BR 6.5.2. SCANNER MOTOR DRIVE CIRCUIT General Scanner motor drive circuit is consist of motor current control circuit ,FB (Flat Bed) motor driver and ADF (Auto Document Feeder: equipped model only) motor driver . 6.5.2.1. MOTOR CURRENT CONTROL CIRCUIT 1. Circuit explanation According to the scan speed, each motor current is controlled for appropriate value.
  • Page 27 KX-MB283BR 6.5.2.2. FB (FLAT BED) MOTOR DRIVE CIRCUIT 1. Functions This motor functions for main operations including FB copy and PC scan. This motor feeds CIS unit with synchronizing for reading. 2. Motor operation During motor driving, pin A8 of IC 300 become low level, then motor driver IC502 is activated.

  • Page 28: Timing Chart And Wave Form Of Scanner Motors

    KX-MB283BR 6.6. TIMING CHART AND WAVE FORM OF SCANNER MOTORS Control sequence and waveform of both FB and ADF motor are almost same. 6.6.1. NORMAL 1-2 PHASE EXCITATION (HALF STEP) 1. Timing chart 2. Wave form...
  • Page 29 KX-MB283BR 6.6.2. FLAT TORQUE 1-2 PHASE EXCITATION (HALF STEP) 1. Timing chart 2. Wave form...
  • Page 30 KX-MB283BR 6.6.3. W 1-2 PHASE EXCITATION (QUARTER STEP) 1. Timing chart 2. Wave form...

  • Page 31: Fan Motor Section

    KX-MB283BR 6.6.4. DRIVE MODE OF FB AND ADF MOTOR Correspondent table of operation 6.7. FAN MOTOR SECTION These FAN are used to radiate the heat inside of the unit. 6.7.1. LEFT SIDE FAN (FAN1) When the output of pin A11 of IC300 becomes high level or pulse, Left side FAN (FAN1) is activated.
  • Page 32 KX-MB283BR 6.7.2. RIGHT SIDE FAN (FAN2) When the output of pin D11of IC300 becomes high level or pulse, Right side FAN (FAN2) is activated. During the FAN rotation, the pulse signal is output from pin 2 of FAN2 and input to pin W24 of IC300.

  • Page 33: Solenoid Driver Section

    KX-MB283BR 6.8. SOLENOID DRIVER SECTION The solenoid drive circuit controls Resistance solenoid and Pick up Solenoid. These solenoids are designed to be driven 24V. The diodes protect transistors from reverse generated voltage when solenoids are turned off. RESISTANCE MODE IC300_T26...

  • Page 34: Lsu (Laser Scanning Unit) Section

    KX-MB283BR 6.9. LSU (Laser Scanning Unit) SECTION...
  • Page 35 KX-MB283BR...

  • Page 36: Sensors And Switches Section

    KX-MB283BR 6.10. SENSORS AND SWITCHES SECTION All of the sensor and switches are shown below. Sensor Name Sensor Location Reference number Message Error Pickup sensor Pickup & Fan2 PCB SW50 [PAPER JAMMED] [CHECK REAR CVR] [WRONG PAPER & PRESS START]...
  • Page 37 KX-MB283BR 6.10.1. DRUM DETECTION DRUM SENSOR is not arranged. DRUM unit is detected when HVERR SENSOR arranged in H.V.P.S becomes effective. High Voltage ERROR Status Drum sensor Signal (IC300-P26) Abnormal DRUM can not be detected Low level Normal DRUM can be detected High level 6.10.2.
  • Page 38 KX-MB283BR 6.10.3. EXIT SENSOR This sensor detects whether the recording paper exits or not. When there is a recording paper at the position of the sensor, the input signal of IC300-AD20pin becomes low level. When there is no recording paper at the position of the sensor, the input signal of IC300-AD20pin becomes high level.
  • Page 39 KX-MB283BR 6.10.5. REGISTRATION & MANUAL PAPER SENSOR This sensor detects whether the recording paper is at the sensor position. When the recording paper is detected, the shelter plate lets the sensor light pass. So the photo-transistor turns on, and input signal of IC300-AF20pin becomes low level.
  • Page 40 KX-MB283BR 6.10.7. DOCUMENT SENSOR This sensor detects whether a document is set in ADF or not. When a document is set in ADF, the shelter plate closes the sensor light. So the photo-transistor turns off, and input signal of IC300-AF23pin becomes high level.
  • Page 41 KX-MB283BR 6.10.9. TONER SENSOR..“TONER EMPTY”, “TONER LOW”, “CHANGE DRUM” The Sensor detects whether or not the Drum unit and the toner are present. When there is not Drum unit, Hall IC (IC50) turns off, and the input signal of IC300-AE22pin (Main Board) becomes a High level over 9s.
  • Page 42 KX-MB283BR 6.10.9.1. TONER DETECTION FLOW CAUTION: 1. Toner low can be judged by continuous 5-times TONER LOW signal at only printing. (It is not executed at.) 2. Toner full can be judged by continuous 3-times TONER FULL signal at initialization.
  • Page 43 KX-MB283BR 6.10.9.2. Drum Detection...

  • Page 44: Operation Board Section

    KX-MB283BR 6.11. OPERATION BOARD SECTION The unit consists of a LCD (Liquid crystal display), KEYs and LEDs (light-emitting diodes). They are controlled by the Gate Array (IC1) on Operation board and IC300 on Main board. The key matrix table is shown below.

  • Page 45: Lcd Section

    KX-MB283BR 6.12. LCD SECTION The Gate Array (IC1) works only for writing the ASCII code from the data bus (D4~D7). V0 is supplied for the LCD drive. R118 and R117 are density control resistors. Consequently, in this unit, the timing (positive clock) is generated by the LCD interface circuitry in the gate array (IC1).

  • Page 46: Hvps (High Voltage Power Supply) Section

    KX-MB283BR 6.13. HVPS (High Voltage Power Supply) SECTION 6.13.1. HVPS SPECIFICATION Charge (CHG) Grid Developing DC Developing AC Transfer (TRA) - Transfer (TRA) + Output Characteristics Constant current Constant voltage Constant voltage Constant voltage Constant current Constant voltage (Variable) Nominal Output Voltage 4.35KV 475±10V...
  • Page 47 KX-MB283BR 6.13.3. DEV DC BIAS UNIT When CHG REM is “L”, 5.425kHz PWM (Pulse Width Modulation) is input from IC300 to DEV CLK through Q504, developing voltage corresponding to the DUTY of PWM signal is output from DEV OUTPUT. Also DUTY is adjusted by the utilization of the developing unit and environmental temperature.

  • Page 48: Heat Lamp Control Circuit

    KX-MB283BR 6.14. HEAT LAMP CONTROL CIRCUIT The temperature of the fixing part of the Fuser Unit is converted to a voltage by THERMISTOR and input to IC300-D19pin. The heat lamp is turned on/off by the HTRCTL signal (IC300-AD19pin) through the photo triac (PC2) and the triac (SCR51). And two thermostats are set on the AC line as the safety devices.
  • Page 49 KX-MB283BR...
  • Page 50 KX-MB283BR 2. Safety Protection a. 2 thermostats are provided with the unit, and the heater circuit is shut down when their surface temperatures became over 160°C. b. The heater control circuit of IC300 has the built-in function that the software turns off the heater control automatically if the heater is not turned ON every a fixed time.
  • Page 51 KX-MB283BR Temperature AD value HEX reading Temperature AD value HEX reading Temperature AD value HEX reading [C°] [C°] [C°] Note: The value is displayed on LCD at TEST FUNCTIONS (P.73) [#815].
  • Page 52 KX-MB283BR The correspondence readings between temperature measured by fixing thermistor and HEX readings Temperature AD value HEX reading Temperature AD value HEX reading Temperature AD value HEX reading [C°] [C°] [C°]...

  • Page 53: Main Board Section

    KX-MB283BR Temperature AD value HEX reading Temperature AD value HEX reading Temperature AD value HEX reading [C°] [C°] [C°] 6.15. Main Board Section 3.3V Power Supply descriptions • IC 302 decreases the output voltage when NPN transistor installed chopper amplifier type switching regulator produces 2.3A min or over at the output voltage.
  • Page 54 KX-MB283BR DC-DC Main Board Supply...
  • Page 55 KX-MB283BR wave form...

  • Page 56: Power Supply Board Section

    KX-MB283BR 6.16. POWER SUPPLY BOARD SECTION The power supply board circuit generates +7V and +24Vdc. It also supplies AC voltage to the halogen heat lamp in the fuser unit. The power supply board uses the switching regulator method. Block Diagram...

  • Page 57: Mechanical Operation

    KX-MB283BR 6.17. Mechanical Operation 6.17.1. PRINTING The main motor gear rotates as shown in figure. GEAR DRIVE OPC drives each part of fixing and developing. When paper is fed from the standard cassette, the plunger of solenoid is pulled to drive PICK UP ROLLER (STANDARD), then the roller starts feeding paper.
  • Page 58 KX-MB283BR 6.17.2. SCANNING (ADF) • DOCUMENT TRANSMISSION (ADF) The frictional force between SEPARATION ROLLER (DOC.)and SEPARATION RUBBER makes PICK UP ROLLER (DOC.) move downward from standby position to pick up paper. Pick-upped paper is separated by SEPARATION ROLLER (DOC.) and SEPARATION RUBBER (DOC.), and then fed by FEED ROLLER (DOC.).

  • Page 59: Location Of Controls And Components

    KX-MB283BR 7 Location of Controls and Components 7.1. OVERVIEW 7.1.1. Front view (1) Top cover (2) ADF (Auto Document Feeder) cover (3) Document guides (4) Document cover (5) Output tray (6) Top cover release lever (7) Document entrance (8) Paper input tray...

  • Page 60: Control Panel

    KX-MB283BR 7.2. CONTROL PANEL (1) COPY (2) SCAN (3) COLLATE (4) CONTRAST (5) RESOLUTION (6) ZOOM (7) PAGE LAYOUT (8) SET (9) MENU (10) STOP (11) POWER SAVE (12) Navigator key (13) START...

  • Page 61: Installation Instructions

    KX-MB283BR 8 Installation Instructions 8.1. INSTALLATION 8.1.1. OUTPUT TRAY Pull the output tray extender (1) forward gently until it clicks into place, then press the centre part of the extender (2) to open. Note: • Do not place the unit in an area where the output tray may be easily bumped into.
  • Page 62 KX-MB283BR 8.1.2. RECORDING PAPER 8.1.2.1. Using the paper input tray The paper input tray unit can hold: — Up to 250 sheets of 60 g/m to 75 g/m paper. — Up to 230 sheets of 80 g/m paper. — Up to 200 sheets of 90 g/m paper.
  • Page 63 KX-MB283BR Adjust the recording paper guides. Pinch the front side of the recording paper guide (4), then slide it to match the paper size mark. Pinch the right side of the recording paper guide (5), then slide it to adjust the width to the size of the recording paper.
  • Page 64 KX-MB283BR 8.1.2.2. Using the manual input tray You can print on plain paper and labels. The manual input tray is used only for printing with the computer and can hold one page at a time. When printing multiple pages, add a next page after the first page has been fed into the unit.
  • Page 65 KX-MB283BR 8.1.3. DOCUMENTS THE UNIT CAN SEND 8.1.3.1. Using the auto document feeder 8.1.3.2. Using the scanner glass Effective scanning area Note for the auto document feeder and the scanner glass • Check that ink, paste or correction fluid has dried completely.
  • Page 66 To ensure that the unit operates properly, we recommend the use of Panasonic toner cartridge (Model No. KX-FAT92A) and drum unit (Model No. KX-FAD93A). To maintain print quality and machine life, we recommend you to clean slots and openings and the inside of the unit when replacing the toner cartridge and/or drum unit.
  • Page 67 KX-MB283BR Turn the levers (5) on each side of the toner cartridge while pressing down firmly. Make sure that the triangles (6) match, to install the toner cartridge cor- rectly. Lift the top cover release lever (7) and open the top cover (8).
  • Page 68 KX-MB283BR Install the drum and toner unit (11) by holding the tabs. • Make sure that the triangles (12) match, to install the drum and toner unit correctly. Close the top cover until locked.
  • Page 69 KX-MB283BR Caution: • To prevent injuries, be careful not to put your hands under the top cover. Note: • While the unit displays “PLEASE WAIT”, do not open the top cover, or disconnect the power cord. Waste disposal method Waste material should be disposed of under conditions which meet all national and local environmental regulations.
  • Page 70 KX-MB283BR 8.1.5. CONNECTING TO A COMPUTER Panasonic Multi-Function Station software enables the unit to carry out the following functions: - Printing on plain paper and labels - Scanning documents and converting an image into text with Readiris OCR software - Scanning from other applications for Microsoft® Windows® that support TWAIN scanning...
  • Page 71 KX-MB283BR For USB connection 1. [Connect directly with a USB cable.] → [Next] • The [Connect Device] dialogue box will appear. 2. Connect the unit with the USB cable (1), then click [Next]. • If the unit is connected to your computer, the model name will be automatically detected.

  • Page 72: Connections

    KX-MB283BR 8.2. CONNECTIONS Caution: • When you operate this product, the power outlet should be near the product and easily accessible. • Be sure to use the telephone line cord included in this unit. • Do not extend the telephone line cord.

  • Page 73: Test Mode

    KX-MB283BR 9 Test Mode 9.1. TEST FUNCTIONS The codes listed below can be used to perform simple checks of some of the unit’s functions. When complaints are received from customers, they provide an effective tool for identifying the locations and causes of malfunctions.
  • Page 74 KX-MB283BR Test Mode Type of Mode Code Function Operation after code input SENSOR CHECK Service Mode “8” “1” “5” First of all, press the copy button, and confirm the action of ON/OFF. For each sensor’s operation, refer to SENSORS AND SWITCHES SECTION (P.36).
  • Page 75 KX-MB283BR 9.1.1. DTMF SINGLE TONE TRANSMIT SELECTION Note: After performing this check, do not forget to turn the setting off. otherwise, dialing in DTMF signal will not work. 9.1.2. BUTTON CODE TABLE...
  • Page 76 KX-MB283BR 9.1.3. PRINT TEST PATTERN 1. NO.01 3. NO.03 2. NO.06 • These print test patterns are just image printing, and differ- ent from actual ones. • When it is required to judge the print quality, compare with the printing of a nondefective machine.

  • Page 77: Service Mode

    KX-MB283BR 10 Service Mode The programming functions are used to program the various features and functions of the machine, and to test the machine. This facilitates communication between the user and the service man while programming the unit. 10.1. PROGRAMMING AND LISTS 10.1.1.
  • Page 78 KX-MB283BR 10.1.3. USER FUNCTION Basic features Code Function Set Value Default Remote Setting SELECT LAUNGUAGE 1:PORTUGUES / 2:ENGLISH PORTUGUESE LCD CONTRAST 1:NORMAL / 2:DARKER NORMAL CHANGE PASSWORD --------- DEFAULT=1234 PAPER SIZE 1:LETTER / 2:A4 / 3:LEGAL POWER SAVE 5:5min / 15:15min / 30:30min / 60:1h...
  • Page 79 KX-MB283BR 10.1.4. SERVICE FUNCTION TABLE Code Function Set Value Effective Default Remarks Range Call Service Clear Memory clear Refer to Memory Clear Specification (P.79). ROM check See (P.73). Scanner test See (P.73). Motor test See (P.73). LED test See (P.73).

  • Page 80: User Mode (The List Below Is An Example Of The System Setup List The Unit Prints Out.)

    KX-MB283BR 10.2. USER MODE (The list below is an example of the SYSTEM SETUP LIST the unit prints out.) (SAMPLE) Note: The above values are the default values.

  • Page 81: History (Example Of A Printed Out List)

    KX-MB283BR 10.3. HISTORY (Example of a printed out list) Note: See the following descriptions of this report. Item No. (1) ~ (49) are corresponding to the listed items in DESCRIPTIONS OF THE HISTORY REPORT(P.82).
  • Page 82 KX-MB283BR 10.3.1. DESCRIPTIONS OF THE HISTORY REPORT (1) ROM VERSION FLASH ROM version (2) SUM FLASH ROM internal data calculation. (3)-(10) Not used (11) USAGE TIME The amount of time the unit has been powered ON. (12)-(20) Not used (21) NUMBER OF COPY The number of pages copied.

  • Page 83: Troubleshooting Guide

    KX-MB283BR 11 Troubleshooting Guide 11.1. USER RECOVERABLE ERRORS If the unit detects a problem, one or more of the following messages will appear on the display. The explanations given in the [ ] are for servicemen only. DISPLAY MESSAGE CAUSE AND REMEDY •...
  • Page 84 KX-MB283BR DISPLAY MESSAGE CAUSE AND REMEDY • The unit is warming up. Wait for a while. • The document is jammed. Remove the jammed document. • Attempted to send or copy a document longer than 600 mm using the auto document feeder. Press [STOP] to remove the document.

  • Page 85: Troubleshooting Details

    KX-MB283BR 11.2. TROUBLESHOOTING DETAILS 11.2.1. OUTLINE Troubleshooting is for recovering quality and reliability by determining the broken component and replacing, adjusting or cleaning it as required. First, determine the problem then decide the troubleshooting method. If you have difficulty finding the broken part, determine which board is broken.
  • Page 86 KX-MB283BR 11.2.3. INITIALIZATION There are two types of initialization, one is the short initialization (about 3 seconds) and the other is the long initialization (about 10 seconds). The short initialization makes the unit enter the standby mode. The long initialization makes the unit enter the...
  • Page 87 KX-MB283BR 11.2.4. SIMPLE CHECK LIST Note: Check according to the service code referring to TEST FUNCTIONS (P.73)
  • Page 88 KX-MB283BR 11.2.5. SIMPLIFIED TROUBLESHOOTING GUIDE 11.2.5.1. PRINTING Symptom Cause Countermeasure GHOST IMAGE (P.98) Failed drum unit Replace drum unit Failed transfer unit Check the transfer roller and spring Failed the high-voltage terminal Check the high-voltage terminal Failed the high voltage power supply board Go to HIGH VOLTAGE SECTION (P.128)
  • Page 89 KX-MB283BR 11.2.5.2. RECORDING PAPER FEED Symptom Cause Countermeasure MULTIPLE FEED (P.104) Dirty or failed the pickup roller Clean or replace the pickup roller Dirty or failed the pickup rubber Clean or replace the separation rubber THE RECORDING PAPER Dirty the pressure roller or the heat roller...
  • Page 90 KX-MB283BR 11.2.5.3. COPY Symptom Cause Countermeasure DOCUMENT FEED Failed the document sensor lever Replace the document sensor lever DOCUMENT Failed the document sensor Go to SENSOR SECTION (P.117) FEED,DOCUMENT Dirty or failed the separation roller Clean or replace the separation roller...
  • Page 91 KX-MB283BR 11.2.6. CALL SERVICE TROUBLESHOOTING GUIDE Call Service related error is most frequent. Call Service 1 ----- Polygon doesn’t rotate..Refer to LSU (Laser Scanning Unit) SECTION (P.34). • First, listen to the sound. If rotation sound isn't heard, check 24V line, POLON signal and POLCLK signal. If even a little of sound is heard, check XREADY signal.
  • Page 92 KX-MB283BR 11.2.6.1. CALL SERVICE 1 "CALL SERVICE 1" means that the polygon motor inside the LSU does not rotate. The rotation of the polygon motor is detected by IC300-F23pin (NREADY).
  • Page 93 KX-MB283BR 11.2.6.2. CALL SERVICE 2 "CALL SERVICE 2" means that the synchronous signal out of the LSU cannot be detected. The synchronous signal out of the LSU is detected by IC 300-G23pin. (NHSYNC) Note: As for the "Pulse" waveform of the above flow chart, see the timing chart.
  • Page 94 KX-MB283BR 11.2.6.3. CALL SERVICE 3 "CALL SERVICE 3" means that the temperature of the fuser does not rise up to or exceed a constant temperature. The temperature is monitored with the thermistor inside the fuser and detected with the voltage input into IC 300-D19.
  • Page 95 KX-MB283BR 11.2.6.4. CALL SERVICE 4 "CALL SERVICE 4" means that the FAN does not run or the running of the FAN cannot be detected normally. The running of the FAN is detected by IC300-AC20 and W24pin. "CALL SERVICE 4" is displayed when it detects NG three times continuously.
  • Page 96 KX-MB283BR 11.2.6.5. CALL SERVICE 5 “CALL SERVICE 5” means that Engine DC motor’s rotation detection signal (LD) does not become Low.
  • Page 97 KX-MB283BR 11.2.6.6. CALL SERVICE 6 “CALL SERVICE 6” indicates that abnormal charge voltage is output from the high voltage unit.
  • Page 98 KX-MB283BR 11.2.7. PRINT 11.2.7.1. GHOST IMAGE CROSS REFERENCE: HIGH VOLTAGE SECTION(P.128) POWER SUPPLY BOARD SECTION(P.56)
  • Page 99 KX-MB283BR 11.2.7.2. DARK OR WHITE VERTICAL LINE Note: When wiping the cover glass, reflecting mirror, use a dry and soft cloth.
  • Page 100 KX-MB283BR 11.2.7.3. DARK OR WHITE HORIZONTAL LINE CROSS REFERENCE: HIGH VOLTAGE SECTION (P.128)
  • Page 101 KX-MB283BR 11.2.7.4. DIRTY OR HALF DARKNESS BACKGROUND CROSS REFERENCE: HIGH VOLTAGE SECTION (P.128)
  • Page 102 KX-MB283BR 11.2.7.5. BLACK PRINT CROSS REFERENCE: HIGH VOLTAGE SECTION (P.128) LSU (Laser Scanning Unit) SECTION (P.34)
  • Page 103 KX-MB283BR 11.2.7.6. LIGHT PRINT CROSS REFERENCE: HIGH VOLTAGE SECTION (P.128)
  • Page 104 KX-MB283BR 11.2.7.7. BLACK OR WHITE POINT 11.2.8. RECORDING PAPER FEED 11.2.8.1. MULTIPLE FEED...
  • Page 105 KX-MB283BR 11.2.8.2. THE RECORDING PAPER IS WAVED OR WRINKLED...
  • Page 106 KX-MB283BR 11.2.8.3. SKEW...
  • Page 107 KX-MB283BR 11.2.8.4. THE RECORDING PAPER DOES NOT FEED CROSS REFERENCE: SENSOR SECTION (P.117) MOTOR SECTION (P.120)
  • Page 108 KX-MB283BR 11.2.8.5. THE RECORDING PAPER JAM...
  • Page 109 KX-MB283BR CROSS REFERENCE: FAN MOTOR SECTION (P.31) When the recording paper jam is occurred, the service mode *630 distinguishes the cause. 0:No Paper Jam 1:The paper was pulled into the unit. 2:The paper was longer than the maximum length of the Resistance sensor.
  • Page 110 KX-MB283BR 11.2.9. ADF (Auto Document Feeder) SECTION 11.2.9.1. NO DOCUMENT FEED,DOCUMENT JAM and MULTIPLE DOCUMENT FEED. CROSS REFERENCE: SENSOR SECTION (P.117)
  • Page 111 KX-MB283BR CROSS REFERENCE: MOTOR SECTION (P.120)
  • Page 112 KX-MB283BR 11.2.9.2. SKEW (ADF)
  • Page 113 KX-MB283BR 11.2.9.3. THE SENT FAX DATA IS SKEWED CROSS REFERENCE: SKEW (ADF) (P.112) 11.2.9.4. THE RECEIVED FAX DATA IS SKEWED CROSS REFERENCE: SKEW (P.106) 11.2.9.5. THE COPIED DATA IS EXPANDED...
  • Page 114 KX-MB283BR 11.2.9.6. BLACK OR WHITE VERTICAL LINE IS COPIED...
  • Page 115 KX-MB283BR 11.2.10. AN ABNORMAL IMAGE IS COPIED CROSS REFERENCE: CIS CONTROL SECTION (P.124)
  • Page 116 KX-MB283BR 11.2.11. INITIALIZING ERROR After the power is turned on, the SOC (IC300) initializes and checks each IC. The ROM (IC402) and SDRAM (IC400) are checked. If initialization fails for the ICs, the system will not boot up. In this case, please find the cause as follows.
  • Page 117 KX-MB283BR 11.2.12. OPERATION PANEL SECTION Refer to TEST FUNCTIONS (P.73). 1. NO KEY OPERATION 2. NO LCD INDICATION CROSS REFERENCE: TEST FUNCTIONS (P.73) 11.2.13. SENSOR SECTION Refer to SENSORS AND SWITCHES for the circuit description. Perform an SENSOR CHECK to determine if the sensor is operating correctly.
  • Page 118 KX-MB283BR 2. Check the paper exit sensor..“PAPER JAMMED” 3. Check the read position sensor ..“CHECK DOCUMENT” 4. Check the registration & manual paper sensor ..“PAPER JAMMED” 5. Check the print timing sensor ..“PAPER JAMMED” 6. Check the document sensor...
  • Page 119 KX-MB283BR 7. Check the top cover sensor ..“TOP COVER OPEN” 8. Check the toner sensor ..“TONER LOW”, “CHANGE DRUM” 9. Check the option handset hook switch CROSS REFERENCE: SENSORS AND SWITCHES SECTION (P.36)
  • Page 120 KX-MB283BR 11.2.14. MOTOR SECTION 11.2.14.1. ENGINE MOTOR...
  • Page 121 KX-MB283BR 11.2.14.2. FB (Flatbed) MOTOR...
  • Page 122 KX-MB283BR 11.2.14.3. ADF MOTOR...
  • Page 123 KX-MB283BR 11.2.15. LSU SECTION CROSS REFERENCE: LSU (Laser Scanning Unit) SECTION (P.34)
  • Page 124 KX-MB283BR 11.2.16. CIS CONTROL SECTION...
  • Page 125 KX-MB283BR CROSS REFERENCE: TEST FUNCTIONS (P.73)
  • Page 126 KX-MB283BR 11.2.17. HIGH VOLTAGE VALUE CHECK POINT Measurement Procedure 1. Turn Off the unit, and open the unit cover. 2. Remove the developing unit, if it is equipped. 3. Connect the wire to the terminal to be measured (Fig. 2). The wire should be put out of the unit not to interfere in other termi- nals (Fig.
  • Page 127 KX-MB283BR...
  • Page 128 KX-MB283BR 11.2.18. HIGH VOLTAGE SECTION 1. Main...
  • Page 129 KX-MB283BR 2. CHG, GRID 3. TRA (+)
  • Page 130 KX-MB283BR 3. DEV DC TRA (-)
  • Page 131 KX-MB283BR 11.2.19. USB SECTION Troubleshooting 1. Confirmation of the PC settings...
  • Page 132 KX-MB283BR 2. Confirmation of the main unit...
  • Page 133 KX-MB283BR USB (Universal Serial Bus) block Description This is a USB block for data communication with PC. Two signal lines (D+/D-) are differential signals which work in reverse phase. VBUS: CN300 1pin D+: CN300 3pin D-: CN300 2pin GND: CN300 4pin...
  • Page 134 KX-MB283BR Waveform of normal operation...
  • Page 135 KX-MB283BR 11.2.20. LAN SECTION LAN Block Diagram LAN Circuit signal waveform (Normal) Transmitter waveform [TD+ ( CN750 pin1), TD- ( CN750 pin2) differential voltage] : Differential probe is used. 1. When network equipment is not connected (LAN cable is not connected);...
  • Page 136 KX-MB283BR 2. When 100Base-TX-enabled deviced is connected;...
  • Page 137 KX-MB283BR 3. When 10Base-T-enabled device is connected.
  • Page 138 KX-MB283BR IC750 ( C1CB00002227 : 3.3V Single Power Supply) Pin Description Pin No Signal Name Input/Output(*) Description MDIO Management Independent Interface ( MII ) Data I/O MII Clock Input RXD3/PHYAD1 Ipd /O MII Receive Data Output RXD2/PHYAD2 Ipd /O MII Receive Data Output...
  • Page 139 KX-MB283BR Pin No Signal Name Input/Output(*) Description Ground XTAL feedback Crystal Oscillator Input VDDPLL Analog PLL 2.5V power supply RST# Chip Reset ;Active low NOTE: I=input o=output I/O = bi-directional Ipu = input w/ internal pull-up Ipd = input w/ internal pull-down...
  • Page 140 KX-MB283BR 11.2.21. MAIN BOARD SECTION 3.3V TROUBLESHOOTING GUIDE...
  • Page 141 KX-MB283BR 1.2V TROUBLESHOOTING GUIDE...
  • Page 142 KX-MB283BR 11.2.22. POWER SUPPLY BOARD SECTION 11.2.22.1. KEY COMPONENTS FOR TROUBLESHOOTING Check the following parts first: F1, F2, D10-D13, C5, Q1 and PC1. This comes from our experience with experimental test. For example: power supply and lightning surge voltage test, with standing voltage test, intentional short circuit test, etc.
  • Page 143 KX-MB283BR 11.2.22.2. TROUBLESHOOTING FLOW CHART 11.2.22.3. BROKEN PARTS REPAIR DETAILS (D10~D13) Check for a short-circuit in terminal 4. If D10~D13 is short-circuit, F2 will melt (open). In this case, replace all of the parts (D10 - D13, F2). (D101) If D101 is broken, the oscillation circuit in the power supply cannot operate. Check it with an electric tester.

  • Page 144: Document Jams (Auto Document Feeder)

    KX-MB283BR 11.3. DOCUMENT JAMS (AUTO DOCUMENT FEEDER) Caution: • Do not pull out the jammed document forcibly before lifting the ADF cover. Open the ADF cover (1) while holding the document cover (2). Remove the jammed document (3) carefully. When the document has jammed near the document entrance:...
  • Page 145 KX-MB283BR When the document has jammed near the document exit: Close the ADF cover.

  • Page 146: Recording Paper Jam

    KX-MB283BR 11.4. RECORDING PAPER JAM 11.4.1. When the recording paper has jammed inside of the unit The display will show the following. Caution: • Do not pull out the jammed paper forcibly before opening the top cover. • To prevent injuries, be careful not to put your hands under the...
  • Page 147 KX-MB283BR Case 1: When the recording paper has jammed near the manual input tray: 1. Pull open the paper input tray (1). 2. Open the manual input tray (2) and remove the jammed paper (3) carefully by pulling it upwards. Then close the manual input tray.
  • Page 148 KX-MB283BR Case 2: When the recording paper has jammed near the drum and toner unit: 1. Pull open the paper input tray (1). 2. Lift the top cover release lever (2) and open the top cover (3). Note: • Do not touch the transfer roller (5)
  • Page 149 KX-MB283BR 3. Remove the jammed paper (6) carefully by pulling it upwards. Remove the jammed paper (7) carefully by pulling it toward you. 4. Close the paper input tray.
  • Page 150 KX-MB283BR 5. Close the top cover until locked. Case 3: When the recording paper has jammed near the fuser unit: 1. Lift the top cover release lever (1) and open the top cover (2). Note: • Do not touch the transfer roller (4).
  • Page 151 KX-MB283BR 3. Remove the jammed paper (6) carefully by pulling it upwards. 4. Push back the green levers (7) to the original position. 5. Close the top cover until locked.
  • Page 152 KX-MB283BR 11.4.2. When the recording paper is not fed into the unit properly The display will show the following. Pull the paper input tray until it clicks into place, then put it com- pletely out, lifting the front part of the tray. Remove the recording paper and straighten.
  • Page 153 KX-MB283BR 11.4.3. When the recording paper in the manual input tray is not fed into the unit properly The display will show the following. Remove the recording paper. Re-insert the recording paper. Note: • If the error message is still displayed, check the recording paper specifications and re-install recording paper.

  • Page 154: Service Fixture & Tools

    KX-MB283BR 12 Service Fixture & Tools...

  • Page 155: Disassembly And Assembly Instructions

    KX-MB283BR 13 Disassembly and Assembly Instructions Note: Remove the Document Cover, the Paper Input tray and the drum and toner cartridge before reassembling.

  • Page 156: Adf Section

    KX-MB283BR 13.1. ADF SECTION...

  • Page 157: Remove Adf Section (1)

    KX-MB283BR 13.2. REMOVE ADF SECTION (1)

  • Page 158: Remove Adf Section

    KX-MB283BR 13.3. REMOVE ADF SECTION...

  • Page 159: Remove Top Cover Section

    KX-MB283BR 13.4. REMOVE TOP COVER SECTION...

  • Page 160: Remove Scanner Glass Section

    KX-MB283BR 13.5. REMOVE SCANNER GLASS SECTION...

  • Page 161: Remove Operation Panel Section

    KX-MB283BR 13.6. REMOVE OPERATION PANEL SECTION...

  • Page 162: Left Side Section

    KX-MB283BR 13.7. LEFT SIDE SECTION 13.8. REMOVE MAIN BOARD...

  • Page 163: Remove Gear Chassis Section

    KX-MB283BR 13.9. REMOVE GEAR CHASSIS SECTION...

  • Page 164: Remove Paper Feed Roller

    KX-MB283BR 13.10. REMOVE PAPER FEED ROLLER 13.11. RIGHT SIDE SECTION...

  • Page 165: Remove Right Side Cover Section

    KX-MB283BR 13.12. REMOVE RIGHT SIDE COVER SECTION...

  • Page 166: Lower Side Cabinet Section

    KX-MB283BR 13.13. LOWER SIDE CABINET SECTION...

  • Page 167: Remove Right Cassette Guide

    KX-MB283BR 13.14. REMOVE RIGHT CASSETTE GUIDE 13.15. REMOVE PICK UP BOARD...

  • Page 168: Remove High Voltage Power Board

    KX-MB283BR 13.16. REMOVE HIGH VOLTAGE POWER BOARD...

  • Page 169: Remove Pick Up Roller Unit

    KX-MB283BR 13.17. REMOVE PICK UP ROLLER UNIT...

  • Page 170: Remove Low Voltage Power Board

    KX-MB283BR 13.18. REMOVE LOW VOLTAGE POWER BOARD...

  • Page 171: Remove Fuser Unit

    KX-MB283BR 13.19. REMOVE FUSER UNIT...

  • Page 172: Installation Position Of The Lead

    KX-MB283BR 13.20. Installation Position of The Lead 13.20.1. MAIN BAORD SECTION...
  • Page 173 KX-MB283BR 13.20.2. BOTTOM PART SECTION...
  • Page 174 KX-MB283BR 13.20.3. SIDE CABINET SECTION...
  • Page 175 KX-MB283BR 13.20.4. HIGH VOLTAGE POWER SUPPLY BOARD SECTION...
  • Page 176 KX-MB283BR 13.20.5. LOW VOLTAGE POWER SUPPLY BOARD SECTION...
  • Page 177 KX-MB283BR 13.20.6. AC INLET SECTION 13.20.7. SOLENOID LEAD SECTION...

  • Page 178: Maintenance

    KX-MB283BR 14 Maintenance 14.1. MAINTENANCE ITEMS AND COMPONENT LOCATIONS 14.1.1. OUTLINE MAINTENANCE AND REPAIRS ARE PERFORMED USING THE FOLLOWING STEPS. 1. Periodic maintenance Inspect the equipment periodically and if necessary, clean any contaminated parts. 2. Check for breakdowns Look for problems and consider how they arose.
  • Page 179 KX-MB283BR 14.1.2.1. Maintenance List OPERATION CHECK REMARKS Document Path Remove any foreign matter such as paper. — Rollers If the roller is dirty, clean it with a damp cloth then dry thor- Refer to MAINTENANCE CHECK ITEMS/ oughly. COMPONENT LOCATIONS(P.178)

  • Page 180: Maintenance

    KX-MB283BR 14.2. MAINTENANCE 14.2.1. CLEANING THE WHITE PLATES AND GLASS Clean the white plates and glass when a black line, a white line or a dirty pattern appears on: — your recording paper, — the original document, — the scanned data, or —...
  • Page 181 KX-MB283BR 14.2.1.2. Lower glass Disconnect the power cord. Lift the top cover release lever (1) and open the top cover (2). Note: • Do not touch the transfer roller (4). Remove the drum and toner unit (5) by holding the tabs.
  • Page 182 KX-MB283BR Clean the lower glass (6) with a soft and dry cloth. Reinstall the drum and toner unit (7) by holding the tabs. • Make sure that the triangles (8) match, to install the drum and toner unit correctly.
  • Page 183 KX-MB283BR Close the top cover until locked. Caution: • To prevent injuries, be careful not to put your hands under the top cover. Re-connect the power cord.
  • Page 184 KX-MB283BR 14.2.2. CLEANING THE DOCUMENT FEEDER ROLLERS Clean the rollers when the document frequently misfeeds. Disconnect the power cord. Open the ADF cover (1) while holding the document cover (2). Clean the document feeder rollers (3) with a cloth moistened with iso- propyl rubbing alcohol, and let all parts dry thoroughly.

  • Page 185: Printing Operation Principle

    KX-MB283BR 14.3. PRINTING OPERATION PRINCIPLE 14.3.1. PROCESS CHART AND PROCESS BIAS 14.3.2. CHARGING Charging is the stage that keeps the surface of the sensitive drum a fixed electric potential. The sensitive drum is the Organic Photo Conductor (OPC), which is a electric conductive cylinder whose surface is covered with the Charge Generation Transfer Layer (CGTL).
  • Page 186 KX-MB283BR 14.3.3. EXPOSING When the drum which is charged with the fixed electric charge is irradiated by the laser beam, the plus charge and minus charge are generated at the Charge Generation Transfer Layer. Passing through the Charge Generation Transfer Layer which conducts the minus charge, the plus-charged drum's surface is neutralized to be skipped.
  • Page 187 KX-MB283BR 14.3.5. DEVELOPING AND TRANSCRIPTION The developing is the stage that the OPC drum with an invisible image is changed to visible by the toner. The drum unit consists of mixing paddle, toner supply roller, developing roller, developing blade, charge wire, grid plate and OPC drum. The bias voltage is added to the developing roller and toner supply roller.
  • Page 188 KX-MB283BR 14.3.6. CLEANING OF TRANSFER ROLLER The toner attached to the surface of the OPC drum is transferred to the paper at the transcription stage, but a part of the toner remains. The cleaning is the stage that cleans the remain toner after the transcription stage. The remain toner on the drum and the toner which was attached to the place where the laser beam didn't scan are gathered to the developing roller to be used again.
  • Page 189 KX-MB283BR 14.3.7. FIXING On the process of the transfer, the transferred toner is weakly attached on the paper. Fixing means the process to fix the toner on the paper permanently. The fixing part melts the toner at the high temperature using the halogen heater. The toner is fixed on the paper by the heat and pressure through the fixing part with the image.

  • Page 190: Terminal Guide Of The Ics

    KX-MB283BR 14.4. TERMINAL GUIDE OF THE ICs TRANSISTORS AND DIODES 14.4.1. MAIN BOARD (1)
  • Page 191 KX-MB283BR 14.4.2. MAIN BOARD (2) 14.4.3. OPERATION BOARD...

  • Page 192: How To Replace The Flat Package Ic

    KX-MB283BR 14.5. HOW TO REPLACE THE FLAT PACKAGE IC Even if you do not have the special tools (for example, a spot heater) to remove the Flat IC, with some solder (large amount), a soldering iron and a cutter knife, you can easily remove the ICs that have more than 100 pins.
  • Page 193 KX-MB283BR 14.5.3. FLAT PACKAGE IC INSTALLATION PROCEDURE 1. Temporarily fix the FLAT PACKAGE IC, soldering the two marked pins. *Check the accuracy of the IC setting with the corresponding soldering foil. 2. Apply flux to all pins of the FLAT PACKAGE IC.

  • Page 194: Main Board Section

    KX-MB283BR 14.6. MAIN BOARD SECTION When the unit fails to boot up the system, take the troubleshooting procedures very carefully. It may have a serious problem. The symptom: No response when the power is turned on. (No LCD display, and keys are not accepted.) The first step is to check the power source.
  • Page 195 KX-MB283BR 14.6.1. NG EXAMPLE...

  • Page 196: Test Chart

    KX-MB283BR 14.7. TEST CHART 14.7.1. ITU-T No.1 TEST CHART...
  • Page 197 KX-MB283BR 14.7.2. ITU-T No.2 TEST CHART...

  • Page 198: Schematic Diagram

    KX-MB283BR 15 Schematic Diagram 15.1. For Schematic Diagram Note: 1. DC voltage measurements are taken with an oscilloscope or a tester with a ground. 2. The schematic diagrams and circuit board may be modified at any time with the development of new technology.

  • Page 199: Main Board

    SCIO16 +3.3V 3:9E FANDET2 TONEAVDD SCIO17 IC301 3:14B TOPCVR TONEAVSS SCIO18 R392 3:9G PSTART SCIO19/EXSEN4 AC11 TEST SCIO20 AD11 CLKSEL SCIO21 AC18 NWDTRST SCIO22 AD18 NRST SCIO23 R304 3:13K NHSYNC SCIO24 XSYSRST 10E;2:3I KX-MB283BR SCHEMATIC DIAGRAM (MAIN BAORD No.1) (1/3)
  • Page 200 VSS_44 RTCCLKOUT +1.2V VSS_45 VSS_46 R380 VSS_47 PLL24VDD K0.22u C304 VSS_48 PLL240VSS 32.768KHZ VSS_49 R381 AE24 VSS_50 PLL393VDD K0.22u C305 AF25 VSS_51 PLL393VSS VSS_52 R382 VSS_53 PLL266VDD2 K0.22u C306 VSS_54 PLL266VSS2 VSS_55 VSS_56 KX-MB283BR SCHEMATIC DIAGRAM (MAIN BOARD No.1) (2/3)
  • Page 201 Q301 Q300 R311 R312 1.5k +3.3V +1.2V L374 4.9u C395 Q303 R359 DRVH PHASE R360 ISET DRVL COMP FS/SYNC VSENSE IC305 +3.3V +3.3V L399 R450 R451 +1.2V +24V +5VD C488 C490 R452 C491 KX-MB283BR SCHEMATIC DIAGRAM (MAIN BOARD No.1) (3/3)
  • Page 202 KX-MB283BR MEMO...
  • Page 203 DQ12 1:5E FRMD[4] NFRWE XSYSRST *RESET FRMA[22] 1:10E;1:3K DQ11 FRMD[3] *WP/ACC RY/*BY DQ10 FRMA[19] FRMD[2] FRMA[18] FRMA[8] FRMD[1] FRMA[7] FRMA[6] FRMD[0] FRMA[5] FRMA[4] VSS1 FRMA[3] FRMA[2] FRMA[1] 1:6B FRMA[0-23] 1:5D NFRCE 1:5D NFROE KX-MB283BR SCHEMATIC DIAGRAM (MAIN BOARD No.2) (1/2)
  • Page 204 TX_CLKI TXC/REFCLK 1:7D TX_ER VDDPLL TXER R76733 *RST VDDC +2.5PLL +2.5VA +2.5V L750 L751 R761 1:7D RX_ER R762 1:7D RX_CLKI R763 1:7D RX_DV R764 1:7E R765 1:7D MDIO 1:7D RXD[0-3] R758 1:2I XLANRST KX-MB283BR SCHEMATIC DIAGRAM (MAIN BOARD No.2) (2/2)
  • Page 205 KSTART KSTART R559 1:5I KTXD R516 KTXD C557 R560 1:5I KSCLK CN505 KSCLK Q507 R561 1:5I OPERST OPERST J180p +5VD TO HVPS C555 Z0.1u R591 1:2J;4:2H BUZZER(NC) DAOUT KSTART 292161-8 KTXD KSCLK KX-MB283BR SCHEMATIC DIAGRAM (MAIN BOARD No.3) (1/2) 625KHZ...
  • Page 206 1:2H;2:12C CRM3 RCSB 1:2H;2:12C CR_XA CRM2 1:2H;2:12C CRM1 PHB1 BOUT1 CR_XB 1:2H;2:12C CRM0 PHA1 R535 PWMSW AOUT2 +3.3V S5VOUT RCSA VREFB AOUT1 Q522 VREFA R534 C520 Q521 VPUMP R538 K0.01u/50V 1:2J 2:12D MVREF KX-MB283BR SCHEMATIC DIAGRAM (MAIN BOARD No.3) (2/2)
  • Page 207 KX-MB283BR 15.2.4. MAIN BOARD (4) This circuit is not used in KX-MB283BR. R114 1:2G;1:7B RING 1:7B +3.3VA1 IC101 IC100 Q102 R111 1:7C;2J AFECLK DCT2 MCLK *OFHK +3.3VA1 1:7C ASPCLK *FSYNC *RGDT/FSD/M1 IGND 1:7B ABITCLK SCLK DCT3 C104 R101 R136 1:7B...
  • Page 208 KX-MB283BR This circuit is not used in KX-MB283BR. +5VD RLY100 Q100 1:5G EXTRLY D103 R135 Q104 L100 L111 L106 F100 Q103 L107 C113 R116 Q106 POS100 L110 R129 L101 L105 CN100 1000V C112 R134 SA101 R125 R118 Q105 R133 RLY101...

  • Page 209: Operation Board

    KX-MB283BR 15.3. OPERATION BOARD...

  • Page 210: Sensor Board

    Fuser (Exit Sensor) CN61 PFLP1911MZ-B CN60 CN62 CN53 THRM1 PS50 POUT CN52 THERM PFLP1911MZ-G CN56 PICKUP & FAN2 3.3V PFLP1911MZ-C DOCU PS54 PS53 CN51 SW50 PICK CN63 FANDET2 FANON2 REGIST & PTOP PFLP1911MZ-D CN50 PTOP PS52 PS51 KX-MB283BR SENSOR BOARD...
  • Page 211 KX-MB283BR MEMO...

  • Page 212: Printed Circuit Board

    C103 C386 C115 Q303 IC750 D101 R120 R132 SA100 SA101 C762 R754 R122 L753 C755 POS100 R124 2 C312 R752 C320 R125 R753 PCB-CH L752 CN750 7 L399 J300 R450 R755 CN300 CN101 C488 LED750 KX-MB283BR MAIN BOARD COMPONENT VIEW...
  • Page 213 TP-CHKSEL R391 +3.3V/BATT IC301 C319 RESET IC303 R388 C323C322 DA300 +1.2V R344 R389 TMS TRSTN R756 C751 C765 TDO TDI IC305 C766 C764 C759 C752 C760 C763 C758 R359 R360 C393 R361 R357 R358 R356 KX-MB283BR MAIN BOARD BOTTOM VIEW...

  • Page 214: Operation Board

    KX-MB283BR 16.2. OPERATION BOARD OPERATION BOARD 16.2.1. : COMPONENT VIEW LED1 R16C16 LED4 LED3 LED2 R33 R38...
  • Page 215 KX-MB283BR OPERAION BOARD 16.2.2. : BOTTOM VIEW...

  • Page 216: Sensor Board

    16.3. SENSOR BOARD 16.3.1. TONER SENSOR BOARD CN64 CN65 AUTO-CH PFUP1659Z -A PFUP1659Z -A CN66 CN67 KX-MB283BR TONER SENSOR BOARD 16.3.2. FUSER BOARD (EXIT SENSOR BOARD) PS50 CN53 AUTO-CH PFUP1659Z -B PFUP1659Z -B KX-MB283BR FUSER SENOSR BOARD 16.3.3. PICKUP SENSOR BOARD...
  • Page 217 KX-MB283BR 16.3.4. REGISTRATION BOARD KX-MB283BR REGISTRATION BOARD 16.3.5. VARISTOR SENSOR BOARD ZNR50 PFUP1659Z -E KX-MB283BR VARISTOR SENSOR BOARD...
  • Page 218 KX-MB283BR 16.3.6. FLATBED RELAY BOARD KX-MB283BR FLATBED RELAY BOARD 16.3.7. ADF SENSOR BOARD PS53 PS54 CN56 PFUP1659Z -G KX-MB283BR ADF SENSOR BOARD...

  • Page 219: Exploded View And Replacement Parts List

    KX-MB283BR 17 Exploded View and Replacement Parts List 17.1. CABINET, MECHANICAL AND ELECTRICAL PARTS LOCATION 17.1.1. OPERATION PANEL SECTION...
  • Page 220 KX-MB283BR 17.1.2. TOP COVER SECTION...
  • Page 221 KX-MB283BR 17.1.3. ADF SECTION...
  • Page 222 KX-MB283BR 17.1.4. MOTOR SECTION...
  • Page 223 KX-MB283BR 17.1.5. LOWER CABINET SECTION...
  • Page 224 KX-MB283BR 17.1.6. UPPER CABINET SECTION...
  • Page 225 KX-MB283BR 17.1.7. FUSER SECTION...
  • Page 226 KX-MB283BR 17.1.8. LOWERSIDE CABINET...
  • Page 227 KX-MB283BR 17.1.9. GEAR SECTION (1)
  • Page 228 KX-MB283BR 17.1.10. GEAR SECTION (2)
  • Page 229 KX-MB283BR 17.1.11. CASSETTE / OUTPUT TRAY...
  • Page 230 KX-MB283BR 17.1.12. ACTUAL SIZE OF SCREWS AND WASHERS...
  • Page 231 KX-MB283BR 17.1.13. ACCESSORIES AND PACKING MATERIALS...

  • Page 232: Replacement Parts List

    KX-MB283BR 17.2. REPLACEMENT PARTS LIST Ref. Part No. Part Name & Description Remarks RTL (Retention Time Limited) N2GAYY000002 IMAGE SENSOR Notes: PFUS1642Y COIL SPRING PFUS1344Z COIL SPRING 1. The “RTL” marking indicates that its Retention Time is PFDC1005Y GUIDE Limited.
  • Page 233 KX-MB283BR Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks XUC2FJP RETAINING RING PFJS07M82Z LEAD WIRE PFDE1244Z LEVER PFJS05M76Z LEAD WIRE PFDG1416Z GEAR PFUV1111Z COVER PFDR1065Z ROLLER PFJS04M72Z LEAD WIRE PFDG1413Z GEAR PFDE1252Z...
  • Page 234 KX-MB283BR 17.2.1.7. FUSER SECTION 17.2.1.9. GEAR SECTION (1) Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks PFDJ1115Z SPACER PFDG1548Z GEAR PFDS1015Y ROLLER PFNPD052080 SPACER A4DP3L000002 HALOGEN LAMP/120 PFDG1549Z GEAR PFDG1544Z GEAR PFDJ1114Z...
  • Page 235 KX-MB283BR 17.2.1.13. ACCESSORIES PACKING Ref. Part No. Part Name & Description MATERIALS Q525 UNR92ANJ0L TRANSISTOR(SI) Q526 UNR92ANJ0L TRANSISTOR(SI) (CAPACITORS) Ref. Part No. Part Name & Description Remarks C300 ECJ0EF1C104Z C301 ECJ0EF1C104Z PFQW2639Y LEAFLET C304 ECJ0EB0J224K 0.22 PFJKMB271Z MEMORY PARTS C305 ECJ0EB0J224K 0.22...
  • Page 236 KX-MB283BR Ref. Part No. Part Name & Description Ref. Part No. Part Name & Description C423 ECUE1H101JCQ 100p C653 ECJ0EF1C104Z C424 ECUE1H101JCQ 100p C654 ECJ0EF1C104Z C425 ECUE1H101JCQ 100p C655 ECJ0EF1C104Z C426 ECUE1H101JCQ 100p C656 ECJ0EF1C104Z C427 ECUE1H101JCQ 100p C657 ECJ0EF1C104Z...
  • Page 237 KX-MB283BR Ref. Part No. Part Name & Description Ref. Part No. Part Name & Description CN501 K1KA05A00364 CONNECTOR R335 ERJ2GEJ472X 4.7k CN502 K1KA08AA0193 CONNECTOR R338 ERJ2GEJ103 CN504 K1KA07A00280 CONNECTOR R340 ECUE1H220JCQ CN505 K1KA07A00257 CONNECTOR R348 ECUE1H220JCQ CN506 K1KA03AA0193 CONNECTOR R349...
  • Page 238 KX-MB283BR Ref. Part No. Part Name & Description Ref. Part No. Part Name & Description R524 ERJ2GEJ472X 4.7k (COMPONENTS PARTS) R525 ERJ12YJ390 RA314 EXB28V470JX RESISTOR ARRAY R526 ERJ2GEJ103 RA315 EXB28V470JX RESISTOR ARRAY R527 ERJ2GEJ562X 5.6k RA316 EXB28V470JX RESISTOR ARRAY R528...
  • Page 239 KX-MB283BR Ref. Part No. Part Name & Description Ref. Part No. Part Name & Description Remarks ERJ3GEYJ912 9.1k PS52 PFVIRM574SL PHOTO ELECTRIC TRANSDUCER ERJ3GEYJ4R7 (RESISTORS) ERJ3GEYJ561 ERJ3GEYJ331 ERJ3GEYJ101 ERJ3GEYJ331 ERJ3GEYJ101 17.2.4.5. VARISTOR SENSOR BOARD ERJ3GEYJ101 ERJ3GEYJ101 ERJ3GEYJ123 Ref. Part No.
  • Page 240 KX-MB283BR KXMB283BR...

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