KX-FL422CX-B / KX-FL422CX-W 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.
KX-FL422CX-B / KX-FL422CX-W 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.
KX-FL422CX-B / KX-FL422CX-W 1.3.3. Laser Beam and Fuser Unit Section • The printer of this unit utilizes a laser. Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure. • The fuser unit is inside of the unit and gets hot. Do not touch it when removing the jammed paper or cleaning the lower glass.
KX-FL422CX-B / KX-FL422CX-W 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.
KX-FL422CX-B / KX-FL422CX-W 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 jumper AC plug and each exposed metal cabinet part (screw heads, control shafts, bottom frame, etc.).
KX-FL422CX-B / KX-FL422CX-W Recording paper specifications A4: 210 mm × 297 mm Recording paper size: Letter: 216 mm × 279 mm Legal: 216 mm × 356 mm Recording paper weight: 60 g/m to 90 g/m Note for recording paper: • We recommend that you test paper (especially special sizes and types of paper) on the unit before purchasing large quantities.
KX-FL422CX-B / KX-FL422CX-W 6.2. General Block Diagram The following is an outline of each device IC on the digital board. 1. SOC (IC101) This custom IC is used for general FAX operations. CPU: This model uses a Z80 equivalent CPU operating at 16MHz.
KX-FL422CX-B / KX-FL422CX-W 6.3. Facsimile Section 6.3.1. Digital Section 6.3.1.1. SOC (IC101) This custom IC is used for general FAX operations. Description of Pin Distribution (IC101) PIN NO. Assigned Signal EXPLANATION ADR0 A[0] Address Bus ADR1 A[1] Address Bus ADR2...
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KX-FL422CX-B / KX-FL422CX-W PIN NO. Assigned Signal EXPLANATION XRESCS2 Test Pin XCHKCS TP_CHKCS Test Pin SD-RAM IF SD-RAM IF SDWE SDWE SD-RAM IF SDCS SDCS SD-RAM IF SDDQML SDDQML SD-RAM IF SDDQMU SDDQMU SD-RAM IF SDCLK SDCLK SD-RAM Clock XEXTINT...
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KX-FL422CX-B / KX-FL422CX-W PIN NO. Assigned Signal EXPLANATION FANON1 FANON1 Fan Control FANDET2 FANON2 FANON2 Fan Control VIN0 -(PU) VIN1 -(PU) VIN2 -(PU) VOUT0 VOUT1 VOUT2 GIOP30 5CTL +5V Power Control GIOP31 HVERR High Voltage Unit Error GIOP32 CISON CIS IF...
KX-FL422CX-B / KX-FL422CX-W 6.3.2. RTC Backup Circuit 1. Function This set has a lithium battery (B531) which works for the Real Time Clock IC (RTC: inside IC101). The RTC continues to work, backed up by a lithium battery even when the power switch is OFF.
KX-FL422CX-B / KX-FL422CX-W 6.4. Analog circuit of Telephone section 6.4.1. General This section is the explanation about analog signal route of voice, beep, fax signal, DTMF signal and so on. Refer to Check sheet for analog signal route. 6.4.1.1. Telephone Monitor 1.
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KX-FL422CX-B / KX-FL422CX-W 6.4.1.4. Analog Block Diagram...
KX-FL422CX-B / KX-FL422CX-W 6.5. Modem Section 6.5.1. Function The unit uses MODEM (IC101) that serves as an interface between the control section for FAX transmission and reception and the telephone line. During a transmitting operation, the digital image signals are modulated and sent to the telephone line via AFE(Analog Front End : IC300).
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KX-FL422CX-B / KX-FL422CX-W 4. Concerning Transmission Time Transmission Time = Control Time + Image Transmission Time Hold Time Transmission time consists of the following. Control time: This is time at the start of transmission when the functions at the sending and receiving sides are confirmed, the transmis- sion mode is established, and transmission and reception are synchronized.
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KX-FL422CX-B / KX-FL422CX-W 6. Explanation of Communication and Compression Technology a. G3 Communication Signals (T. 30 Binary Process) For G3 Facsimile communication, this is the procedure for exchanging control signals between the sending and receiving machines both before and after transmission of image signals.
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KX-FL422CX-B / KX-FL422CX-W Bit No. DIS/DTC Receiver --- T.4 operation Receiver --- T.4 operation 11,12,13,14 Data signaling rate Data signaling rate 0,0,0,0 V.27 ter fall back mode 2400 bit/s, V.27 ter 0,1,0,0 V.27 ter 4800 bit/s, V.27 ter 1,0,0,0 V.29 9600 bit/s, V.29...
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KX-FL422CX-B / KX-FL422CX-W Bit No. DIS/DTC 21, 22, 23 Minimum scan line time capability of the receiver Minimum scan line time (0, 0, 0) 20 ms at 3.85 l/mm: T 20 ms 3.85 (0, 0, 1) 40 ms 40 ms at 3.85 l/mm: T 3.85...
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KX-FL422CX-B / KX-FL422CX-W Signal Identification Signal Format Function ——————— Sends 0 continuously for 1.5 seconds at the same speed as the training signal. (Training Check) X0100001 Notifies the sending side that TCF has been properly received. If TCF is not properly received, FTT (Failure To Train) X0100010 is (Confirmation to Receive) relayed to the sender.
KX-FL422CX-B / KX-FL422CX-W 6.6. NCU Section 6.6.1. General NCU is the with the telephone line. It is composed of Bell detection circuit, Pulse dial circuit, Line amplifier and sidetone circuits. The following is a brief explanation of each circuit. 6.6.2.
KX-FL422CX-B / KX-FL422CX-W 6.6.5. Line Amplifier and Side Tone Circuit 1. Circuit Operation The reception signal output from the line transformer T401 is input to pin (2) of IC401 via C408, R409 and then the signal is amplified at pin (1) of IC401 and sent to the reception system.
KX-FL422CX-B / KX-FL422CX-W 6.6.6. Caller ID Defection This unit is compatible with the Caller ID service offered by your local telephone company. To use this feature, you must subscribe to a Caller ID service. The data for the caller ID from the telephone exchange is sent during the interval between the first and sec- ond rings of the bell signal.
KX-FL422CX-B / KX-FL422CX-W 6.7. CIS Control Section The scanning block of this device consists of a control circuit and a contact image sensor made up of a celfoc lens array, an LED, a light guide, and photoelectric conversion elements. When an original document is inserted and the start button pressed, pin E1 of IC101 goes to a high level and the transistor Q215 turns on.
KX-FL422CX-B / KX-FL422CX-W 6.8. Stepping Motor Drive Section 6.8.1. Engine Motor Drive Circuit 1. Functions This motor functions for main operations FAX reception and copy printing. This feed recording paper synchronized for printing. 2. Motor operation Excitation pulses is output from IC101 pins B25, C25, D25 and F25. Then stepping pulses are output from driver IC (IC200) pin No 16, 18, 19 and 21, and drives the motor coil.
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KX-FL422CX-B / KX-FL422CX-W 6.8.1.2. Engine Motor Drive Circuit...
KX-FL422CX-B / KX-FL422CX-W 6.8.2. Scan Motor Drive Circuit 1. Functions This motor functions for main operations including FAX transmission. This feed document paper synchronized for reading. 2. Motor operation During motor driving, pin E18 of IC101 becomes a high level, and Q218, Q212 turns ON.
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KX-FL422CX-B / KX-FL422CX-W 6.8.2.2. Scan Motor (ADF Motor) Drive Circuit DRIVE MODE FUNCTION MODE PHASE PATTERN SPEED SCAN STANDARD 2 phase 579pps SCAN FAX/COPY FINE/PHOTO 2 phase 579pps SCAN FAX/COPY SUPER FINE 1-2 phase 579pps SCAN FAX/COPY PHOTO WITH TEXT...
KX-FL422CX-B / KX-FL422CX-W 6.9. FAN Motor Section This FAN is used to radiate heat in the unit. The signal level at pin J25/H25 of IC101 becomes high, the FAN is activated. In this case, the pulse signal as shown below input to pin G25 of IC101 and the rotation of the FAN is detected.
KX-FL422CX-B / KX-FL422CX-W 6.10. Solenoid Drive Section The solenoid drive circuit controls the pick-up clutch. The solenoid is designed to be driven by +24V, driven by IC101-B12 pin. Diode D203 protects Q229 from backward voltage when the solenoid is driven.
KX-FL422CX-B / KX-FL422CX-W 6.12. Sensors and Switches Section All of the sensor and switches are shown below. Sensor Circuit Location Sensor Sensor or Switch Name Message Error Operation Panel SW641 Document set [CHECK DOCUMENT] Operation Panel PS601 Paper Feed [REMOVE DOCUMENT]...
KX-FL422CX-B / KX-FL422CX-W 6.12.2. Paper Feed Sensor The Sensor detects the front edge of the document. When there is no document, the shelter plate shuts off the sensor light, the photo-transistor turns OFF, and the input signal of IC101-A9pin becomes a high level. When a document is detected, the shelter plate let the sensor light pass through, the photo- transistor turns ON, and the input signal of IC101-A9pin becomes a low level.
KX-FL422CX-B / KX-FL422CX-W 6.12.4. Top Cover Open Switch The Switches detect whether the printer cover is open or closed. When the printer cover is closed, the switches turn ON, and the input signal of IC101-N25pin becomes a low level. When the printer cover is open, the switches turns OFF, and the input signal of IC101-N25pin becomes a high level.
KX-FL422CX-B / KX-FL422CX-W 6.12.5. 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 (IC101-P25) Abnormal DRUM can not be detected Low level Normal...
KX-FL422CX-B / KX-FL422CX-W 6.12.7. Paper Exit Sensor.."PAPER JAMMED" The sensor detects whether the recording paper exit out or not. When there is no recording paper at the position of the sensor, the shelter plate closes the sensor light, the photo-transistor fot tarus OFF, and the input signal of IC101-C8pin becomes high level.
KX-FL422CX-B / KX-FL422CX-W 6.12.8. 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, Magnetic Field Sensor IC (IC512) turns off, and the input signal of IC101-A11 pin (Digital P.C.B) becomes a High level over 9s.
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KX-FL422CX-B / KX-FL422CX-W 6.12.8.1. 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.
KX-FL422CX-B / KX-FL422CX-W 6.13. 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 (IC601) and SOC (IC101: on the DIGITAL BOARD). The key matrix table is shown below.
KX-FL422CX-B / KX-FL422CX-W 6.14. LCD Section The Gate Array (IC601) works only for writing the ASCII code from the data bus (D4~D7). V0 is supplied for the crystal drive. R123 and R124 are density control resistors. Consequently, in this unit, the timing (positive clock) is generated by the LCD interface circuitry in the gate array (IC101).
KX-FL422CX-B / KX-FL422CX-W 6.15. HVPS (High Voltage Power Supply) Section 6.15.1. HVPS Specification Charge (CHG) Grid Developing DC Transfer (TRA-) Transfer (TRA+) Output Characteristics Constant current Constant voltage Constant voltage Constant current Constant voltage (Variable) Nominal Output Voltage 4.25kV 475±18V 220V±15V...
KX-FL422CX-B / KX-FL422CX-W 6.15.4. TRA(+) BIAS (Transfer(+) BIAS)/TRA(-) BIAS (Transfer(-) BIAS) Unit When CHG REM is “L” and TRA CLK is “open”, Charge BIAS(180µA) is output from CHG OUTPUT, and at the same time Trans- fer(+)BIAS(800V) is output from TRA OUTPUT. When 5.425kHz PWM(Plus Width Modulation) signal is input to TRA CLK through...
KX-FL422CX-B / KX-FL422CX-W 6.16. Heat Lamp Control Circuit The temperature of the fixing part of the Fixing Unit is converted to a voltage by THERMISTOR and input to IC106-4pin. The heater turns ON/OFF the photo-coupler PC2 at the heater control port (IC106-29pin), and is turned ON/OFF at the triac SCR1.
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KX-FL422CX-B / KX-FL422CX-W Refer to Call Service Troubleshooting Guide (P.137)
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KX-FL422CX-B / KX-FL422CX-W 2. Safety Protection a. 2 thermostats are provided with the unit, and the heater circuit is shut down when their surface temperatures became over 200°C. b. The heater control circuit of IC101 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.
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KX-FL422CX-B / KX-FL422CX-W Temperature(°C) HEX reading Temperature(°C) HEX reading Temperature(°C) HEX reading Note: The value is displayed on LCD at Test Functions (P.74) [#815]. The correspondence readings between temperature measured by fixing thermistor and HEX readings Temperature(°C) HEX Reading Temperature(°C) HEX Reading Temperature(°C)
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KX-FL422CX-B / KX-FL422CX-W Temperature(°C) HEX Reading Temperature(°C) HEX Reading Temperature(°C) HEX Reading Note: Hex reading : 01h or below = Short of Thermistor Hex reading : F9h or over = Open of Thermistor...
KX-FL422CX-B / KX-FL422CX-W 6.17. Power Supply Board Section This power supply board uses the switching regulator method. [Input Circuit] The input current goes into the input rectifier circuit through the filter circuit. The filter circuit decreases the noise voltage and the noise electric field strength.
KX-FL422CX-B / KX-FL422CX-W 6.18. DC-DC POWER SUPPLY IC201 is FET installed 2ch Synchronous switching regulator. Output Voltage is +1.8V and +3.3V. Oscillation frequency is 2MHz.
KX-FL422CX-B / KX-FL422CX-W 8 Installation Instructions 8.1. Installation Space The space required to install the unit is shown below. The dimensions given are necessary for the unit to operate efficiently. Note: • Avoid excessive heat or humidity. • Use the unit within the following ranges of temperature and humidity.
KX-FL422CX-B / KX-FL422CX-W 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 supplied in this unit. • Do not extend the telephone line cord.
KX-FL422CX-B / KX-FL422CX-W 8.3. Paper Stacker Line up the slots (1) in the paper stacker with the pegs (2) on the bottom of the unit, then insert the two tabs of the paper stacker into the slots on the unit (3).
KX-FL422CX-B / KX-FL422CX-W 8.6. Recording Paper A4, letter or legal size recording paper can be used. The 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.
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KX-FL422CX-B / KX-FL422CX-W Push the tension plate back (1). To use A4 size paper Insert the tabs on the A4 paper guides (1) into the slots. • "L" is shown on the A4 paper guide for the left side. "R" is shown on the A4 paper guide for the right side.
KX-FL422CX-B / KX-FL422CX-W 8.7. Document Requirements Document Weight • Single sheet:45 g/m to 90 g/m • Multiple sheet:60 g/m to 80 g/m Note: • Remove clips, staples or other fasteners. • Do not set the following types of documents: (Make a copy of the document using another copier and set the copy.)
To check the drum life and quality, please print the printer test list. If printing quality is still poor, replace the toner cartridge and drum unit. To ensure that the unit operates properly, we recommend the use of Panasonic toner cartridge (Model No. KX-FAT88E/KX- FAT88A) and drum unit (Model No. KX-FAD89E/KX-FAD89A).
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KX-FL422CX-B / KX-FL422CX-W Lift open the front cover (1), holding the dotted area (2) on the right side. Remove the drum and toner unit (1) by holding the two tabs. • Do not touch the transfer roller (2). • If you replace the toner cartridge and the drum unit at the same time, skip to step 9.
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KX-FL422CX-B / KX-FL422CX-W Remove the used cartridge (1) from the drum unit (2). • The toner may stick to the cartridge and the drum unit. Be careful when handling. • Do not drop the toner on the black drum surface (3).
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KX-FL422CX-B / KX-FL422CX-W Make sure that the triangles (1) match, to install the toner cartridge cor- rectly. • If the lower glass (2) is dirty, clean it with a soft and dry cloth. Install the drum and toner unit (1) by holding the tabs.
KX-FL422CX-B / KX-FL422CX-W • Close the front cover (1) by pushing down on both sides, until locked. Place the handset on the cradle and attach the document stacker. • While the unit displays “PLEASE WAIT”, do not open the front cover, or disconnect the power cord.
KX-FL422CX-B / KX-FL422CX-W 9 Operating Instructions 9.1. To Select Characters with the Dial Keypad Pressing the dial keys will select a character as shown below. 9.2. To Select Characters Using [ + ] or [ - ] Instead of pressing the dial keys, you can select characters using [ + ] or [ - ].
KX-FL422CX-B / KX-FL422CX-W 10 Test Mode 10.1. 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.
KX-FL422CX-B / KX-FL422CX-W 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.40).
KX-FL422CX-B / KX-FL422CX-W 10.1.3. 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.
KX-FL422CX-B / KX-FL422CX-W 11 Service Mode 11.1. Programming and Lists 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.
KX-FL422CX-B / KX-FL422CX-W 11.1.3. Service Function Table Code Function Set Value Effective Default Remarks Range Pause time set X 100 msec 001~600 ---------- Flash time X 10 msec 01-09 ---------- Dial speed select 1:10 pps 1, 2 ---------- 2:20 pps V.34 transmit speed selection...
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KX-FL422CX-B / KX-FL422CX-W Code Function Set Value Effective Default Remarks Range CNG transmit select 1:OFF Lets you select the CNG output during FAX trans- 2:ALL mission. ALL: CNG is output at phase A. AUTO: 3:AUTO CNG id output only when automatic dialing is per- formed.
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KX-FL422CX-B / KX-FL422CX-W Code Function Set Value Effective Default Remarks Range Print test pattern See Print Test Pattern P.77 Top margin ---------- Left margin ---------- DTMF ON time X msec 060~200 ---------- DTMF OFF time X msec 060~200 ---------- History list P.84...
KX-FL422CX-B / KX-FL422CX-W 11.2. The Example of the Printed List 11.2.1. User Mode (The list below is an example of the SYSTEM SETUP LIST the unit prints out.) Note: The above values are the default values.
KX-FL422CX-B / KX-FL422CX-W 11.2.3. 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.85).
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KX-FL422CX-B / KX-FL422CX-W 11.2.3.1. Descriptions of the History Report (1) ROM VERSION (30) Not used FLASH ROM version (31) NUMBER OF PRINTING HELP (2) SUM The number of help lists printed until now. FLASH ROM internal data calculation. (32) NUMBER OF DIVIDED PRINTING IN FAX RECEP-...
KX-FL422CX-B / KX-FL422CX-W 12 Troubleshooting Guide 12.1. 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 •...
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KX-FL422CX-B / KX-FL422CX-W DISPLAY MESSAGE CAUSE AND REMEDY • The document is jammed. Remove the jammed document. • The document is longer than 600 mm. Press [STOP] to remove the document. Divide the document into two or more sheets and try again.
KX-FL422CX-B / KX-FL422CX-W 12.2.2. Special Service Journal Reports Journal 2 and Journal 3 shown below, which are special journals giving the additional detailed information about the latest 35 communications, can be printed by Service Code 881 or 882. Remote printing function for the journal reports (JOURNAL, JOURNAL 2 and JOURNAL 3) is also available for service technicians.
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KX-FL422CX-B / KX-FL422CX-W 12.2.2.1. Journal 2 Refer to JOURNAL 2 in Printout Example(P.99). Journal 2 displays the additional detailed information about the last 35 communications. Descriptions: (1) RCV. MODE Indicates which receive mode the unit was in when the unit received a fax message.
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KX-FL422CX-B / KX-FL422CX-W 12.2.2.2. Journal 3 Refer to JOURNAL 3 in Printout Example(P.99). Description (6) ENCODE (10) MAKER CODE Compression Code: MH/MR/MMR This shows a 2 digit code of the other party's fax machine brand. (7) MSLT MSLT means Minimum Scan Line Time. Used only at the 0E: “KX”...
KX-FL422CX-B / KX-FL422CX-W 12.2.3. Communication Section Find the problem in the table shown below, and refer to the corresponding troubleshooting procedure in Defective Facsimile Section (P.102). Symptom Content Possible cause The paper dose not feed properly when faxing. Troubleshooting Problem with the feeding mecha- nism.
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KX-FL422CX-B / KX-FL422CX-W 12.2.3.1. Defective Facsimile Section 12.2.3.1.1. Transmit Problem CROSS REFERENCE: Cleaning the Inside of the Unit (P.187) ADF (Auto Document Feed) Section (P.156) Operation Panel Section (P.110)
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KX-FL422CX-B / KX-FL422CX-W 12.2.3.1.2. Sometime There is a Transmit Problem Note: “596: Transmit level set” represents a service code. Refer to the Service Function Table (P.79). “717: Transmit speed select” represents a service code. Refer to the Service Function Table (P.79).
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KX-FL422CX-B / KX-FL422CX-W 12.2.3.1.3. Receive Problem Confirm the following before starting troubleshooting. • Is the recording paper installed properly? Refer to the next page. Note: “596: Transmit level set” represents a service code. Refer to the Service Function Table (P.79).
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KX-FL422CX-B / KX-FL422CX-W 12.2.3.1.4. The Unit can copy, but cannot Transmit / Receive CROSS REFERENCE: Test Functions (P.74)
KX-FL422CX-B / KX-FL422CX-W 12.2.4. Initializing Error After the power is turned on, the IC101 initializes and checks each IC. The ROM (IC102), and SDRAM (IC103) are checked. If initialization fails for the ICs, the system will not boot up. In this case, please find the cause as follows.
KX-FL422CX-B / KX-FL422CX-W 12.2.5. Analog Board Section This chapter provides the testing procedures required for the analog parts. A signal route to be tested is determined depending upon purposes. For example, the handset TX route begins at the handset microphone and the signal is output to the telephone line.
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KX-FL422CX-B / KX-FL422CX-W 12.2.5.2. Defective ITS (Integrated Telephone System) SECTION 1. No handset and speakerphone transmission / reception Perform a signal test in the ITS or the NCU section and locate a defective point (where the signal disappears) on each route...
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KX-FL422CX-B / KX-FL422CX-W 4. No tone dialing CROSS REFERENCE: Check sheet for analog signal route (P.107)
KX-FL422CX-B / KX-FL422CX-W 12.2.5.3. Operation Panel Section Refer to Test Functions (P.74). 1. NO KEY OPERATION 2. NO LCD INDICATION CROSS REFERENCE: Test Functions (P.74)
KX-FL422CX-B / KX-FL422CX-W 12.2.5.4. Sensor Section Refer to SENSORS AND SWITCHES for the circuit description. Perform an SENSOR CHECK to determine if the sensor is operating correctly. 1. Check the ..“CHECK DOCUMENT” 2. Check the paper feed sensor..“REMOVE DOCUMENT”...
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KX-FL422CX-B / KX-FL422CX-W 5. Check the regist sensor..“CHECK PAPER”, “PRESS START” 6. Check the exit switch..“PAPER JAMMED” 7. Check the toner sensor..“TONER LOW”, “CHANGE DRUM” As for the following check, remove the drum from the main body, set it again and close the cover, then perform that check during initializing operation.
KX-FL422CX-B / KX-FL422CX-W 12.2.7. High Voltage Value Check Point Measurement Procedure 1. Unplug 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.
KX-FL422CX-B / KX-FL422CX-W 12.2.9. Power Supply Board Section 12.2.9.1. Key Components for Troubleshooting Check the following parts first: F2, C5, and Q1. This comes from our experience with experimental tests. For example: power supply and lightning surge voltage test, withstanding voltage test, intentional short circuit test, etc.
KX-FL422CX-B / KX-FL422CX-W 12.3. Remote Programming If, after the call is connected, the customer describes the situation and it is determined that the problem can be corrected by making parameter changes, this function makes it possible to change parameters such as the user code and service code from another fax (using DTMF tones).
KX-FL422CX-B / KX-FL422CX-W 12.3.2. Program Mode Table Code Function Set Value Default Remote Set- ting Set date and time dd/mm/yy hh:mm 01/01/09 Your logo --------- None Your fax telephone number --------- None Transmission report mode 2:ON / 3:OFF / 1:ERROR...
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KX-FL422CX-B / KX-FL422CX-W Code Function Set Value Default Remote Set- ting FAX auto redial line disconnection time set 001~999sec 185sec CNG transmit select 1:OFF / 2:ALL / 3:AUTO Time between CED and 300bps 1:75ms / 2:500ms / 3:1sec 75ms Overseas DIS detection select...
KX-FL422CX-B / KX-FL422CX-W 12.4. Troubleshooting Details 12.4.1. 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.
KX-FL422CX-B / KX-FL422CX-W 12.4.3. 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...
KX-FL422CX-B / KX-FL422CX-W 12.4.5. Simplified Troubleshooting Guide 12.4.5.1. Printing Symptom Cause Countermeasure Ghost Image (P.143) 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.119)
KX-FL422CX-B / KX-FL422CX-W 12.4.5.2. Recording Paper Feed Symptom Cause Countermeasure Multiple Feed (P.151) 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 is...
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KX-FL422CX-B / KX-FL422CX-W 12.4.5.3. Copy and Fax Symptom Cause Countermeasure NO DOCUMENT FEED (No Failed the document sensor lever Replace the document sensor lever Document Feed, Docu- Failed the document sensor Go to Document Sensor (P.41) ment Jam and Multiple Doc-...
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KX-FL422CX-B / KX-FL422CX-W 12.4.5.4. Others Symptom Cause Countermeasure Cannot print legal size Not selected the legal mode Select the legal mode in the user programming mode 'CHECK DRUM' on the LCD The drum unit can not be detected. Go to Drum Detection (P.43) •...
KX-FL422CX-B / KX-FL422CX-W 12.4.6. 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.38). • 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.
KX-FL422CX-B / KX-FL422CX-W 12.4.6.1. 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 IC106-32pin (XREADY).
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KX-FL422CX-B / KX-FL422CX-W 12.4.6.2. 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 IC101-A15pin. (XHSYNC) Note: As for the "Pulse" waveform of the above flow chart, see the timing chart.
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KX-FL422CX-B / KX-FL422CX-W 12.4.6.3. 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 101-A5pin.
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KX-FL422CX-B / KX-FL422CX-W 12.4.6.4. 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 IC 101-G25pin. "CALL SERVICE 4" is displayed when it detects NG five times continuously.
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KX-FL422CX-B / KX-FL422CX-W 12.4.6.5. Call Service 6 “CALL SERVICE 6” indicates that abnormal charge voltage is output from the high voltage unit.
KX-FL422CX-B / KX-FL422CX-W 12.4.7. Print 12.4.7.1. Ghost Image CROSS REFERENCE: High Voltage Section(P.119) Power Supply Board Section(P.124)
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KX-FL422CX-B / KX-FL422CX-W 12.4.7.2. Dark or White Vertical Line Note: When wiping the lower glass, reflecting mirror and LSU lens, use a dry and soft cloth. CROSS REFERENCE: LSU Section (P.115)
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KX-FL422CX-B / KX-FL422CX-W 12.4.7.3. Dark or White Horizontal Line CROSS REFERENCE: High Voltage Section (P.119)
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KX-FL422CX-B / KX-FL422CX-W 12.4.7.4. Dirty or Hulk Darkness Black Ground CROSS REFERENCE: High Voltage Section (P.119)
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KX-FL422CX-B / KX-FL422CX-W 12.4.8.4. The Recording Paper Does Not Feed CROSS REFERENCE: Sensor Section (P.111) Motor Section (P.113)
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KX-FL422CX-B / KX-FL422CX-W 12.4.8.5. The Recording Paper Jam...
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KX-FL422CX-B / KX-FL422CX-W CROSS REFERENCE: Paper Exit Sensor.."PAPER JAMMED" (P.44) FAN Motor Section (P.36) Regist Sensor (P.43) When the recording paper jam is occurred, the service mode *630 distinguishes the cause. 0:No Paper Jam 1:Failed pick up 2:The paper top sensor is not turned OFF although the fixed time had passed since the sensor was turned ON.
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KX-FL422CX-B / KX-FL422CX-W 12.4.9.3. The Sent Fax Data is Skewed CROSS REFERENCE: Skew (ADF) (P.158) 12.4.9.4. The Received Fax Data is Skewed CROSS REFERENCE: Skew (P.152)
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KX-FL422CX-B / KX-FL422CX-W 12.4.9.5. The Received or Copied Data is Expanded...
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KX-FL422CX-B / KX-FL422CX-W 12.4.9.6. Black or White Vertical Line is Copied...
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KX-FL422CX-B / KX-FL422CX-W 12.4.9.7. An Abnormal Image is Copied CROSS REFERENCE: CIS (Contact Image Sensor) Section (P.116)
KX-FL422CX-B / KX-FL422CX-W 14 Disassembly and Assembly Instructions 14.1. Upper Main Cabinet Section CROSS REFERENCE: A-6: How to Remove the Separation Rubber (P.170) A-1: How to Remove the Front Cover (P.166) A-7: How to Remove the Transfer Roller (P.171) A-2: How to Remove the Pick Up Unit (P.167) A-8: How to Remove the Separation Roller (P.172)
KX-FL422CX-B / KX-FL422CX-W 14.2. Lower Main Cabinet Section CROSS REFERENCE: B-1: How to Remove the Bottom Plate (P.173) B-2: How to Remove the Analog Board (P.173) B-3: How to Remove the High Voltage Power Board (P.174) B-4: How to Remove the Laser Unit (P.174) B-5: How to Remove the Fan Unit (P.175)
KX-FL422CX-B / KX-FL422CX-W 15 Maintenance 15.1. Maintenance Items and Component Locations 15.1.1. Outlines 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.
KX-FL422CX-B / KX-FL422CX-W 15.2. Printing • The motor pinion rotates in the direction shown in the figure. • The gears of fixing and developing parts are driven by the GEAR IDLER 67. • The GEAR PAPER FEED ROLLER drives the roller.
KX-FL422CX-B / KX-FL422CX-W 15.3. Printing (Paper Pick Up) During printing • When the SOLENOID is turned ON, the LEVER PICK UP CLUTCH is hooked on the RING of GEAR CLUTCH. It causes the GEAR PICKUP PAPER to rotate. • The recording paper is pressed by the PICKUP ROLLER and the top paper is separated and fed.
KX-FL422CX-B / KX-FL422CX-W 15.4. Scanning (ADF) • DOCUMENT TRANSMISSION (ADF) When the tip of the document is set to a point of contact between the separation roller and the separation pad through the document feed roller, then the document is fed there separately. The document feed roller carries the document...
KX-FL422CX-B / KX-FL422CX-W 15.5. Maintenance 15.5.1. Cleaning the Inside of the Unit Clean the inside of the unit: — If misfeeding of your original occurs frequently. — If a black line, a white line or a dirty pattern appears on your recording paper, on your original, or on the fax document received by the other party.
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KX-FL422CX-B / KX-FL422CX-W • Do not touch the transfer roller (2) Clean the document feeder roller (1) with a cloth moistened with iso- propyl rubbing alcohol, and let all parts dry thoroughly. Clean the upper glass (2) with a soft and dry cloth.
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KX-FL422CX-B / KX-FL422CX-W Re-install the drum and toner unit (1) by holding the tabs. • Make sure that the triangles (2) match to install the drum and toner unit correctly. Close the front cover (1) by pushing down on both sides, until locked.
KX-FL422CX-B / KX-FL422CX-W 15.6. Document Jams Note: • Do not pull out the jammed document forcibly before open- ing the front cover. Remove the handset and document stacker. Lift open the front cover (1), holding the dotted area (2) on the right side.
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KX-FL422CX-B / KX-FL422CX-W Note: • Do not touch the transfer roller (2). Remove the jammed document carefully (1). Push back the inner cover. Close the front cover (1) by pushing down on both sides, until locked. Place the handset on the cradle and attach the document...
KX-FL422CX-B / KX-FL422CX-W 15.7. Recording Paper Jams The display will show the following. 15.7.1. When the recording paper has jammed near the drum and toner unit Remove the handset and document stacker. Lift open the front cover (1), holding the dotted area (2) on the right side.
KX-FL422CX-B / KX-FL422CX-W 15.7.2. When the recording paper has jammed near the recording paper exit: Remove the handset and document stacker. Lift open the front cover (1), holding the dotted area (2) on the right side. Remove the recording paper (1), then remove the drum and toner unit (2) to allow the jammed paper (3) to pull free from the rear cab- inet.
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KX-FL422CX-B / KX-FL422CX-W Remove the jammed paper (1) from the fuser unit by pulling it upwards carefully, then install the drum and toner unit. Push back the levers (1) to the original position. Close the front cover (1) by pushing down on both sides, until locked.
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KX-FL422CX-B / KX-FL422CX-W Pull the tension plate forward (1), then re-insert the recording paper. • Before re-inserting, make sure to fan and straighten the record- ing paper. Push back the tension plate.
KX-FL422CX-B / KX-FL422CX-W 15.8. Printing Operation Principle 15.8.1. Process Chart and Process Bias 15.8.2. 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).
KX-FL422CX-B / KX-FL422CX-W 15.8.3. 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.
KX-FL422CX-B / KX-FL422CX-W 15.8.5. 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 volt- age is added to the developing roller and toner supply roller.
KX-FL422CX-B / KX-FL422CX-W 15.8.6. 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.
KX-FL422CX-B / KX-FL422CX-W 15.8.7. 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.
KX-FL422CX-B / KX-FL422CX-W 15.9. Terminal Guide of the ICs Transistors and Diodes 15.9.1. Digital Board 15.9.2. Analog Board 15.10. How to Replace the Flat Pack- age 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...
KX-FL422CX-B / KX-FL422CX-W 15.10.1. Preparation 15.10.1.1. For Power Supply Board • SOLDER Sparkle Solder 115A-1, 115B-1 OR Almit Solder KR-19, KR-19RMA • Soldering iron Recommended power consumption is between 30 W to 40 W. Temperature of Copper Rod 662 ± 50°F (350 ± 10°C) (An expert may handle a 60~80 W iron, but a beginner might damage the foil by overheating.)
KX-FL422CX-B / KX-FL422CX-W 15.10.3. 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.
KX-FL422CX-B / KX-FL422CX-W 15.11. Digital 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.
KX-FL422CX-B / KX-FL422CX-W 16 Schematic Diagram 16.1. 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.
KX-FL422CX-B / KX-FL422CX-W 17.8. High Voltage Power Supply Board (PCB8) 17.8.1. High Voltage Power Supply Board: Component View EUK1MNA90HA KX-FL422CX-B / KX-FL422CX-W HIGH VOLTAGE POWER SUPPLY BOARD (COMPONENT VIEW)
KX-FL422CX-B / KX-FL422CX-W 17.8.2. High Voltage Power Supply Board: Bottom View EUK1MNA90HA KX-FL422CX-B / KX-FL422CX-W HIGH VOLTAGE POWER SUPPLY BOARD (BOTTOM VIEW)
KX-FL422CX-B / KX-FL422CX-W 17.9. Low Voltage Power Supply Board (PCB9) 17.9.1. Low Voltage Power Supply Board: Component View N0AC2GG00003 KX-FL422CX-B / KX-FL422CX-W LOW VOLTAGE POWER SUPPLY BOARD (COMPONENT VIEW)
KX-FL422CX-B / KX-FL422CX-W 18 Exploded View and Replacement Parts List 18.1. Cabinet, Mechanical and Electrical Parts Location 18.1.1. General Section...
KX-FL422CX-B / KX-FL422CX-W 18.2. Replacement Parts List Safety Ref. Part No. Part Name & Description Remarks RTL (Retention Time Limited) PFHR1542Z CASE/COVER PS-HB Notes: PFDE1204W LEVER POM-HB PFDF1097Z SHAFT 1. The marking (RTL) indicates that the Retention Time is PQDR9685Y...
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KX-FL422CX-B / KX-FL422CX-W Safety Ref. Part No. Part Name & Description Remarks Safety Ref. Part No. Part Name & Description Remarks PNKV1040X2 COVER(KX-FL422CX-W) PS-HB PFKE1050Z3 CABINET COVER (KX-FL422CX-B) PNUS1078Z COIL SPRING PFKE1050Z4 CABINET COVER PNDE1019Z LEVER POM-HB (KX-FL422CX-W) PNUS1091Z BAR SPRING 18.2.1.6.
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KX-FL422CX-B / KX-FL422CX-W 18.2.1.12. Gear Section Safety Ref. Part No. Part Name & Description Remarks WLR18YK26CM4 LEAD WIRE PQMX10010Z CASE/COVER Safety Ref. Part No. Part Name & Description Remarks K2AH3G000011 JACK/SOCKET PFDG1307Z GEAR POM-HB B2P3-VH CONNECTOR PFDG1189Z GEAR POM-HB J0KE00000115 INSULATOR...
KX-FL422CX-B / KX-FL422CX-W Safety Ref. Part No. Part Name & Description Remarks SW634 EVQ11Y05B SPECIAL SWITCH SW635 EVQ11Y05B SPECIAL SWITCH SW636 EVQ11Y05B SPECIAL SWITCH SW637 EVQ11Y05B SPECIAL SWITCH SW638 EVQ11Y05B SPECIAL SWITCH SW639 EVQ11Y05B SPECIAL SWITCH SW640 EVQ11Y05B SPECIAL SWITCH...
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