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Panasonic KX-FG2452CX Service Manual

Panasonic KX-FG2452CX Service Manual

2.4 ghz cordless phone system with fax and copier
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2.4 GHz Cordless Phone System with FAX and Copier
KX-FG2452CX
(for Asia, Middle Near East and Other areas)
© 2006 Matsushita Electric Industrial Co., Ltd.
All rights reserved. Unauthorized copying and distri-
bution is a violation of law.
ORDER NO. KMF0605961CE

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Summary of Contents for Panasonic KX-FG2452CX

  • Page 1 ORDER NO. KMF0605961CE 2.4 GHz Cordless Phone System with FAX and Copier KX-FG2452CX (for Asia, Middle Near East and Other areas) © 2006 Matsushita Electric Industrial Co., Ltd. All rights reserved. Unauthorized copying and distri- bution is a violation of law.

  • Page 2: Table Of Contents

    KX-FG2452CX TABLE OF CONTENTS PAGE PAGE 1 Safety Precautions -----------------------------------------------3 12.3. Error Messages-Report ------------------------------- 100 1.1. For Service Technicians ----------------------------------3 12.4. Remote Programming --------------------------------- 122 1.2. AC Caution---------------------------------------------------3 12.5. Troubleshooting Details ------------------------------- 125 1.3. Personal Safety Precautions ----------------------------4 13 Service Fixture & Tools-------------------------------------- 169 14 Disassembly and Assembly Instructions ------------- 170 1.4.

  • Page 3: Safety Precautions

    KX-FG2452CX 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-FG2452CX 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: Service Precautions

    KX-FG2452CX 1.4. Service Precautions 1.4.1. Precautions to Prevent Damage from Static Electricity Electrical charges accumulate on a person. For instance, clothes rubbing together can damage electric elements or change their electrical characteristics. In order to prevent static electricity, touch a metallic part that is grounded to release the static electricity.

  • Page 6: Warning

    KX-FG2452CX 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 7: Insulation Resistance Test

    KX-FG2452CX 2.2. 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 8: Specifications

    KX-FG2452CX 3 Specifications Any details given in these instructions are subject to change without notice. 3.1. Base Unit Applicable Lines: Public Switched Telephone Network Document Size: Max. 216 mm in width, Max. 600 mm in length Effective Scanning Width: 208 mm A4: 210 mm ×...

  • Page 9: General/Introduction

    ------------------------- KX-TCA89BX Headset Allows hands-free telephone conversations. To ensure the unit operates properly, we recommend the use of a Panasonic replacement film. The ink film is not reusable. Do not rewind and use the ink film again. 5 Features General Enhanced Copier Function •...

  • Page 10: Technical Descriptions

    KX-FG2452CX 6 Technical Descriptions 6.1. Connection Diagram...

  • Page 11: General Block Diagram

    KX-FG2452CX 6.2. General Block Diagram The following is an outline of each device IC on the digital board. (Refer to General Block Diagram (P.12).). 1. ASIC (IC501) Composed mainly of an address decoder and a modem control. Controls the general FAX operations.
  • Page 12 KX-FG2452CX 6.2.1. General Block Diagram REFERENCE: Analog Board Block Diagram (P.41) Cordless Base Block Diagram (P.56)

  • Page 13: Control Section

    KX-FG2452CX 6.3. Control Section 6.3.1. Block Diagram...
  • Page 14 KX-FG2452CX 6.3.2. Memory Map...
  • Page 15 KX-FG2452CX 6.3.3. ASIC (IC501) This custom IC is used for the general FAX operations. 1. CPU: 6. IMAGE DATA RAM: This model uses a Z80 equivalent to the CPU operating This memory is programmed into the ASIC and uses 8 at 12 MHz.
  • Page 16 KX-FG2452CX Descriptions of Pin Distribution (IC501) SIGNAL POWER SUPPLIED DESCRIPTION VOLTAGE VSSA POWER SOURCE (ANALOG GND) VDDA 3.3 3.3V POWER SOURCE (ANALOG +3.3V) AIN1 3.3V CCD IMAGE SIGNAL INPUT AIN2 3.3V THERMISTOR TEMPERATURE WATCH INPUT AIN3 3.3V ----------- AMON 3.3V...
  • Page 17 KX-FG2452CX SIGNAL POWER SUPPLIED DESCRIPTION VOLTAGE TEST2 3.3V HIGH FIXED TEST3 3.3V HIGH FIXED TEST4 3.3V HIGH FIXED XMDMINT 3.3V MODEM INTERRUPT XMDMCS 3.3V MODEM CHIP SELECT XRAS/IOP42 3.3V DRAM (IC503) ROW ADDRESS STROBE XCAS1/IOP/43 3.3V DRAM (IC503) CULUM ADDRESS STROBE XCAS2/IOP44 3.3V...
  • Page 18 KX-FG2452CX SIGNAL POWER SUPPLIED DESCRIPTION VOLTAGE XRESETI 3.3V RESET INPUT WDERR 3.3V WATCHED ERROR OUTPUT SIGNAL THDAT 3.3V RECORDED IMAGE OUTPUT THCLK 3.3V CLOCK OUTPUT FOR DATA TRANSFER THLAT 3.3V PULSE OUTPUT FOR DATA LATCH STBNP 3.3V INPUT PORT (CHARGE) RM0/IOP00 3.3V...
  • Page 19 KX-FG2452CX 6.3.6. Reset Circuit (Watch dog timer) The output signal (reset) from pin 2 of the voltage detect IC (IC505) is input to the ASIC (IC501) 114 pin. 1. During a momentary power interruption, a reset pulse of 60 msec is generated and the system is reset completely.
  • Page 20 KX-FG2452CX 6.3.7. RTC Backup Circuit 1. Function This unit has a lithium battery (BAT151 on Analog Board) which works for Real Time Clock IC (RTC: inside IC501). The RTC continues to work, backed up by a lithium battery even when the power switch is OFF.
  • Page 21 KX-FG2452CX 6.3.8. Supervision Circuit for the Thermal Head Temperature 1. Function The thermistor changes the resistor according to the temperature and uses the thermistor's characteristics. The output of pin 139 of IC501 becomes a low level. Then when it becomes a high level, it triggers point A In point C, according to the voltage output time, the thermal head's temperature is detected.

  • Page 22: Facsimile Section

    KX-FG2452CX 6.4. Facsimile Section 6.4.1. Image Data Flow during facsimile Operation Copy (Fine, Super-Fine, Half Tone) 1. Line information is read by CIS (to be used as the reference white level) via route1, and is input to IC501. Refer to Block Dia- gram (P.23)
  • Page 23 KX-FG2452CX 6.4.2. Block Diagram...
  • Page 24 KX-FG2452CX 6.4.3. Thermal Head 1. Function This unit utilizes the state of the art thermal printer technology. The ink film is chemically processed. The ink film is comprised of two parts: an ink layer and a base film. When the thermal head contacts this ink film, it emits heat momentarily, and the ink layer is melted and transferred to the paper.
  • Page 25 KX-FG2452CX...
  • Page 26 KX-FG2452CX 6.4.4. Scanning Block 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 array, and photoelectric conversion elements. When an original document is inserted and the start button pressed, pin 64 of IC501 goes to a low level and Q601 are turned ON, pin 110 of IC701 goes to a high level and the transistor Q602 turns on.This applies voltage to the LED array to light it.
  • Page 27 KX-FG2452CX 6.4.5. Stepping Motor Drive Circuit 1. Function The stepping motor works for both transmission and reception. 2. Motor During motor driving, pin 124 of ASIC IC501 becomes a high level, and Q403, Q402 turns ON. As a result, +24V is supplied to the motor coil.
  • Page 28 KX-FG2452CX When the motor suspends while it is in the receive mode (about 70~80 msec), pin 124 of ASIC IC501 becomes a low level and Q403 turns OFF. Then Q402 also turns OFF, and instead of +24 V, +6 V is supplied through D401 so that the motor is held in place.

  • Page 29: Sensors And Switches

    KX-FG2452CX 6.5. Sensors and Switches All of the sensor and switches are shown below. Sensor Circuit Location Sensor Sensor or Switch Name Error Message Operation Panel SW351 Document top sensor [REMOVE DOCUMENT] SW352 Document set sensor [CHECK DOCUMENT] Sensor P.C.Board...
  • Page 30 KX-FG2452CX 6.5.1. Document Top Sensor (SW351) When a document is brought to the read position, the SW turns ON, and the input signal of IC301-6 pin (Operation Board) becomes a low level. When there is no document at the read position, the SW turns OFF, and the input signal of IC301-6 pin (Operation Board) becomes a high level.
  • Page 31 KX-FG2452CX 6.5.3. Paper Top Sensor (SW1001) When the recording paper is loaded on the print head or the recording paper cover is opened, the paper top sensor SW turns ON, and the input signal of IC501-43 pin (Digital Board) becomes a low level. Usually, the SW turns OFF, and the input signal of IC501- 43 pin (Digital Board) becomes a high level.
  • Page 32 KX-FG2452CX 6.5.5. Film End Sensor (SW1003) When the operation panel cover is closed and a film is set, the SW turns ON, and the input signal of IC501-26 pin (Digital Board) becomes a low level. When the cover is opened, the SW turns OFF, and the input signal of IC501-26 pin (Digital Board) becomes a high level.

  • Page 33: Modem Section

    KX-FG2452CX 6.6. Modem Section 6.6.1. Function The unit uses a 1 chip modem (IC701) that serves as an interface between the control section for FAX transmission and recep- tion and the telephone line. During a transmitting operation, the digital image signals are modulated and sent to the telephone line.
  • Page 34 KX-FG2452CX 3. Facsimile Call Time Series As shown in the following diagram, the facsimile call time series is divided into five phases. Phase A: Call setting Call setting can be manual/automatic. Phase B: Pre-message procedure Phase B is a pre-processing procedure and sequence for confirming the status of the terminal, transmission route, etc., and for terminal control.
  • Page 35 KX-FG2452CX 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.
  • Page 36 KX-FG2452CX Bit No. DIS/DTC 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 1,1,0,0 V.27 ter and V.29 7200 bit/s, V.29...
  • Page 37 KX-FG2452CX Bit No. DIS/DTC Extend field Extend field R8×15.4 lines/mm R8×15.4 lines/mm 300×300 pels/25.4 mm 300×300 pels/25.4 mm R16×15.4 lines/mm and/or 400×400 pels/25.4 mm R16×15.4 lines/mm and/or 400×400 pels/25.4 mm Inch based resolution preferred Resolution type selection "0" : neuritic based resolution "1"...
  • Page 38 KX-FG2452CX b. Redundancy Compression Process Coding Mode This unit uses one-dimensional MH format.
  • Page 39 KX-FG2452CX 6.6.2. Modem Circuit Operation The modem (IC701) has all the hardware satisfying the ITU-T standards mentioned previously. When the ASIC IC501 (61) is brought to a low level, the modem (IC701) is chip-selected and the resistors inside IC are selected by the select signals from ASIC (IC501) ADR0-ADR4(pin 83~87).

  • Page 40: Analog Section

    KX-FG2452CX 6.7. Analog Section 1. Function The analog section serves as an interface between the telephone line. The digital board (IC701) for transmission and recep- tion of FAX signals, switches between the digital board (IC701) and other sections by means of a multiplexer in the NCU sec- tion.
  • Page 41 KX-FG2452CX 6.7.1. Analog Board Block Diagram...

  • Page 42: Ncu Section

    KX-FG2452CX 6.8. NCU Section 6.8.1. General It is composed of bell detection circuit, pulse dial circuit, TAM interface circuit, line amplifier, sidetone circuits, Remote FAX activa- tion circuit, CPC detection, and a multiplexer. 6.8.2. Remote Fax Activation Circuit 1. Circuit Operation After detecting the bell signal, another telephone connected to the same line switches to the FAX mode by DTMF signal.
  • Page 43 KX-FG2452CX 6.8.5. Line Amplifier and Side Tone Circuit 1. Circuit Operation The reception signal output from the line transformer T101 is input to pin (6) of IC101 via C118, R125 and then the signal is amplified at pin (7) of IC101 and sent to the reception system at 3dB.
  • Page 44 KX-FG2452CX 6.8.6. Calling Line Identification Circuit (FSK) 1. Function This unit is compatible with the Caller ID service offered by your local telephone company. To use this feature, you must sub- scribe to a Caller ID service. The data for the caller ID from the telephone exchange is sent during the interval between the first and second rings of the bell signal.
  • Page 45 KX-FG2452CX 6.8.7. Calling Line Identification Circuit (DTMF) 1. Function 1. This unit is compatible with the Caller ID service offered by your local telephone company. To use this feature, you must sub- scribe to a Caller ID service. The data for the Caller ID from the telephone exchange is sent before the first ring signal. The data from the telephone exchange is sent by DTMF signal.

  • Page 46: Its (Integrated Telephone System) And Monitor Section

    KX-FG2452CX 6.9. ITS (Integrated Telephone System) and Monitor Section 6.9.1. General During the monitor operation, the speaker output passes through the power amplifier (IC705) [Digital board]. The DTMF signal is output from the modem (IC701: digital board). The alarm tone, the key tone, bell tone, and beep are output from gate array IC501 (digital board).

  • Page 47: Operation Board Section

    LCD MODULE ASIC CN302 KSL0~4 CN504 CN301 GATE ARRAY IC501 IC301 KEYS KIN0~7 MATRIX XLED9, 10, 13 LED2 AUTO ANSWER DOCUMENT TOP SW DOCUMENT SET SW CHARGE LED DIGITAL BOARD OPERATION BOARD KX-FG2452CX : OPERATION BOARD BLOCK DIAGRAM Key Matrix...

  • Page 48: Lcd Section

    KX-FG2452CX 6.12. LCD Section The Gate Array (IC301) works only for writing the ASCII code from the data bus (D4~D7). V0 is supplied for the crystal drive. R310, R311 and R312 are density control resistors. Consequently, in this unit, the timing (positive clock) is generated by the LCD interface circuitry in the gate array (IC301).

  • Page 49: Power Supply Board Section

    KX-FG2452CX 6.13. Power Supply Board Section This power supply board uses the switching regulator method. Block Diagram Input Input Rectifier Circuit C106 Output Circuit Surge Circuit D110 Absorber Converter Circuit Circuit R104 A-B Voltage Wave Form Q101 Kick-on Surge Voltage...
  • Page 50 KX-FG2452CX The following is an overview of how the power supply unit is controlled. The control method of this power supply unit is pulse width modulation. When Q is ON, the energy is charged in the transfer primary coil according to E .
  • Page 51 KX-FG2452CX [Surge Absorber Circuit] This circuit is for absorbing surge voltage generated by the transformer. [Control Circuit and Detecting Circuit] The control circuit amplifies the output with increased voltage detected in the error detecting circuit. Then it drives the main tran- sistor.

  • Page 52: Cordless Section

    KX-FG2452CX 6.14. Cordless Section 6.14.1. Frequency The frequency range of 2400MHz~2480MHz is used. Transmitting and receiving channel between base unit and handset is same frequency. Refer to the Frequency Table (P.204). 6.14.2. FHSS (Frequency Hopping Spread Spectrum) This telephone is using an IC chip which has similar specification to WDCT (World Digital Cordless Telephone) and is the cord- less telephone system that can use multiple portable unit simultaneously.
  • Page 53 KX-FG2452CX 6.14.2.1. TDD Frame Format 6.14.2.2. TDMA system This system is the cycles of 10ms, and has four duplex paths, so it is possible to perform four duplex communications simultaneously. In 1 slot 1.25ms, the 10ms of voice data is transmitted.
  • Page 54 KX-FG2452CX 6.14.2.3. Signal Flowchart in the Whole System Reception CN507 of the base unit is connected to the line from TEL line. While talking, the signal through analog board and digital board, then led to DSP (IC801). The DSP encodes ADPCM and TDD/TDMA with FHSS to TX-DATA. The TX-DATA signal is entered to IC901 of RF UNIT, and modulated to 2.4GHz.
  • Page 55 KX-FG2452CX 6.14.3. Explanation of Link Data Communication 6.14.3.1. Calling 6.14.3.2. To Terminate Communication 6.14.3.3. Ringing...
  • Page 56 KX-FG2452CX 6.14.4. Base Section 6.14.4.1. Cordless Base Block Diagram...
  • Page 57 KX-FG2452CX 6.14.4.2. Charge Circuit Ultra charge (170 mA) of maximum 6 hours is started soon after the Handset is placed on the base unit. Finally the mode changes to trickle charge (6 mA) to prevent overcharging. 6.14.4.3. Line Sending Signal Refer to Signal Flowchart in the Whole System (P.54).
  • Page 58 RF_RESET IC371 RSSI 2.6V VBATT2 VCCR REGULATOR VCCA VCCPA IC201 IC373, Q373 3.0V LOUTO (SP) CONVERTOR Headst Jack HSSPOUT LINO (HS_MIC) CN331 Q331 HEADSET HEADSET_DET DETECT ANT_LIGHT Monitor SP SPOUTP SPOUTN AGPIO0 KEYS IC381 2.5V REGULATOR KX-FG2452CX: HNADSET BLOCK DIAGRAM...
  • Page 59 KX-FG2452CX 6.14.5.2. Block Diagram (Handset_RF part) TC_CTRL RSTN RXEN RXGAIN TXEN...
  • Page 60 KX-FG2452CX 6.14.5.3. Construction The circuit mainly consists of DSP and RF unit as shown in the block diagram. 6.14.5.4. DSP: IC201 Function • Battery Low, Power down detect circuit • Ringer Generation • Interface circuit RF unit, speaker, Mic, LED, Key scan, LCD, Headset Note: (*1) The initializing time of the DSP chip is 20ms under normal conditions.
  • Page 61 KX-FG2452CX 6.14.5.7. Power Supply Circuit Voltage is supplied separately to each block.
  • Page 62 KX-FG2452CX 6.14.5.8. Charge Circuit When the Handset is put on the cradle of the Base unit or the charger, the power is supplied from CHARGE+ and CHARGE- ter- minals to charge the battery via R368 or Q361, and D361. The voltage between CHARGE+ and CHARGE- flows R231 → Q231 →...
  • Page 63 KX-FG2452CX 6.14.5.10. Sending Signal The voice signal from the microphone is input to DSP (90, 91). CN331 is the headset jack. When the headphone is connected, Q331 detects it. The input from the microphone of the Handset (MIN, MIP) is cut and the microphone signal from the headset is input to DSP (95).
  • Page 64 KX-FG2452CX 6.14.5.12. 2.4GHz Mod/Demod Circuit (RF Part) IC901 incorporates all of the modulation and demodulation functions. TX Digital data (TX_DATA) from DSP is supplied to pin 27 of IC901, and then 2.4GHz TX modulated signal is output from pin1. This TX signal is filtered by BPF (FL901) and supplied to Antenna.

  • Page 65: Location Of Controls And Components

    KX-FG2452CX 7 Location of Controls and Components 7.1. Overview 7.1.1. Base Unit 7.1.2. Handset (1) Antenna (2) Ringer indicator Message indicator (3) Receiver (4) Microphone (5) Headset jack (6) Speaker (1) CHARGE indicator (2) Document guides (3) Paper tray (4) Metal recording paper guide...

  • Page 66: Control Panel

    KX-FG2452CX 7.2. Control Panel 7.2.1. Base Unit (17) [TONE] • To change from pulse to tone temporarily during dialing when your line has rotary pulse service. You can also use tone dial service by changing feature #13 or feature 051.

  • Page 67: Installation Instructions

    KX-FG2452CX 7.2.2. Handset 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 effi- ciently. (1) [Soft keys] • Two soft keys are used to select the functions displayed directly above each key.

  • Page 68: Connections

    • When the battery is low, the cordless handset beeps inter- mittently while it is in use. Panasonic battery performance It should last up to 5 hours while in use (in conversation). It should last up to about 11 days while not in use (off the base unit).

  • Page 69: Installing The Ink Film

    KX-FG2452CX 8.4. Installing the Ink Film Note: • Battery power is consumed whenever the cordless handset 1. Open the front cover. is off the base unit, even when the cordless handset is not in use. The longer you leave the cordless handset off the base unit, the shorter you can actually talk using the cordless handset.
  • Page 70 KX-FG2452CX • Make sure the blue gear ( ) and white gear ( ) are installed as shown. 5. Turn the blue gear ( ) in the direction of the arrow until the ink film is tight ( ) and at least one layer of ink film is 6.

  • Page 71: Installing The Paper Tray

    KX-FG2452CX 8.5. Installing the Paper Tray 8.6. Paper Support Pull up the metal recording paper guide ( ), then install Hold open the paper support ( ), then insert the ends into the the paper tray ( holes on the paper tray (...

  • Page 72: Installing The Recording Paper

    KX-FG2452CX 8.7. Installing the Recording Paper Document requirements The unit can hold up to 20 sheets of 60 g/m to 90 g/m paper. 1. Fan the paper to prevent paper jams. 2. Insert the paper gently, print-side down ( • Do not force the paper into the paper tray.

  • Page 73: Battery Installation / Replacement

    Connecting an optional headset to the cordless handset allows hands-free phone conversations. 1. Press the notch on the battery cover firmly, and slide the We recommend using a Panasonic headset. See Optional cover. Accessories (P.9). 2. Installation: Insert the battery (...

  • Page 74: Operation Instructions

    KX-FG2452CX 9 Operation Instructions To enter your logo Example: “BILL“ 1. Press [2] 5 times. 9.1. Setting Your Logo You can program your logo (name, company name, etc.) so that it appears on the top of each page sent. 2. Press [4] 6 times.

  • Page 75: Cordless Handset Programming

    KX-FG2452CX 9.2. Cordless Handset Programming 9.2.1. Basic Features 9.2.2. Advanced Features When this setting is changed using the base unit, the setting for the cordless handset will also be changed, and vice versa.

  • Page 76: Other Features

    KX-FG2452CX 9.2.3. Other Features...

  • Page 77: Test Mode

    KX-FG2452CX 10 Test Mode 10.1. Facsimile Section The codes listed below can be used to perform simple checks for 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. To do this, you set the Service mode (Refer to Operation Flow (P.87).) first, then operate the below test items.
  • Page 78 KX-FG2452CX Test Mode Type of Mode Code Function Operation after code input DIGITAL SPEAKER- Service Mode “8” “4” “1” Please refer to Digital Speakerphone (P.151) PHONE RX & TX SPEAKERPHONE CHECK PRINT TEST PAT- Service Mode “8” “5” “2” Prints out the test pattern.
  • Page 79 KX-FG2452CX 10.1.3. Print Test Pattern 1. Platen roller 3. Thermal head 1 dot 2. Left margin / Top margin 4. Use this test pattern to confirm the torque limiter for Ink film and platen roller timing.

  • Page 80: Cordless Section

    KX-FG2452CX 10.2. Cordless Section 10.2.1. Test Mode Flow Chart for Cordless Base Unit LCD display on the cordless test mode 1. Press the [MENU] [#] [9] [0] [0] [0] [ ] [9] [5] [8] keys. LCD display: 2. Press the [SET] key and select test items by pressing [ ] key.
  • Page 81 KX-FG2452CX 10.2.1.1. Test Burst Mode and Test TX-CW Mode...
  • Page 82 KX-FG2452CX 10.2.1.2. RX-CW Test Mode...
  • Page 83 KX-FG2452CX 10.2.1.3. Test Link Mode...
  • Page 84 KX-FG2452CX 10.2.2. Test Mode Flow Chart for Handset 10.2.2.1. TX Burst Mode Note: (*1) LCD displays the Channel number. (exception: default/ CH00 = 1ch.) (*2) Refer to Check Table for RF Part (P.165) and RX-CW Test Mode (P.82) for proper Base Unit settings.
  • Page 85 KX-FG2452CX 10.2.2.2. RX-CW Test Mode Note: (*1) LCD displays the Channel number. (exception: default/ CH00 = 1ch.) (*2) Refer to Check Table for RF Part (P.165) and Test Burst Mode and Test TX-CW Mode (P.81) for proper Base Unit set-...
  • Page 86 KX-FG2452CX 10.2.2.3. Test Link Mode Note: (*1) LCD displays the Channel number. (exception: default/ CH00 = 1ch.) (*2) If can not proceed to the next step, refer to Re-registering the Cordless Handset (P.163). (*3) For factory use only. (*4) Refer to Check Table for RF Part (P.165) and Test Link Mode (P.83) for proper Base Unit settings.

  • Page 87: Service Mode

    KX-FG2452CX 11 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. 11.1. Programming and Lists 11.1.1.
  • Page 88 KX-FG2452CX 11.1.3. Service Function Table Code Function Set Value Effective Default Remarks Range Pause time set X 100 msec 001~600 ---------- Dial speed select 1: 10 pps 1, 2 ---------- 2: 20 pps VOX time 1:6 sec 2:4sec 1, 2...
  • Page 89 KX-FG2452CX Code Function Set Value Effective Default Remarks Range CNG transmit select 1:OFF Lets you select the CNG output during FAX transmis- 2:ALL sion. ALL: CNG is output at phase A. AUTO: CNG id 3:AUTO output only when automatic dialing is performed. OFF: CNG id not output at phase A.
  • Page 90 KX-FG2452CX 11.1.4. Memory Clear Specification Execute Service Mode #550 when you want to reset the all setting data keeping the user information. Execute Service Mode #710 to clear the user information in case that Main Unit is recycled. Note: • Please restart a power supply after clearing a memory.

  • Page 91: How To Clear User Setting

    KX-FG2452CX 11.2. How to Clear User Setting Units are reset to the Factory settings by this operation (Erase recorded Voice messages, stored Phone numbers, Caller list and etc.). This operation should not be performed for a usual repair. 11.2.1. Base Unit Note: Refer to Memory Clear Specification (P.90).

  • Page 92: The Example Of The Printed List

    KX-FG2452CX 11.3. The Example of the Printed List 11.3.1. User Mode Note: The above values are the default values.
  • Page 93 KX-FG2452CX 11.3.2. Service Mode Settings Note: The above values are the default values.
  • Page 94 KX-FG2452CX 11.3.3. History Note: See the following descriptions of this report. Item No. (1) ~ (44) are corresponding to the listed items in Descriptions of the History Report (P.95).
  • Page 95 KX-FG2452CX 11.3.3.1. Descriptions of the History Report (1) SOFTWARE VERSION (22) NUMBER OF RECEIVE FLASH ROM version The number of pages received. (2) SUM (23) NUMBER OF SENDING FLASH ROM internal data calculation. The number of pages sent. (3) YOUR LOGO (24) NUMBER OF CALLER ID The user logo recorded in the unit.

  • Page 96: Troubleshooting Guide

    KX-FG2452CX 12 Troubleshooting Guide 12.1. Troubleshooting Summary After confirming the problem by asking the user, troubleshoot according to the instructions and observe the following precautions. 12.1.1. Precautions 1. If there is a problem with the print quality or the paper feed, first check if the installation space and the print paper meets the specifications, the paper selection lever/paper thickness lever is set correctly, and the paper is set correctly without any slack.

  • Page 97: Error Messages-Display

    KX-FG2452CX 12.2. Error Messages-Display 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. 12.2.1. Base Unit • The back cover is open. Close the back cover firmly.
  • Page 98 • If you send a fax overseas, try the following: —Make sure the other party’s number is a fax number. —Use the overseas transmission mode (feature #23 on Pro- • Please use genuine Panasonic replacement film. gram Mode Table (P.123)). (Refer to Optional Accessories (P.9).) —Add 2 pauses at the end of the telephone number or dial...
  • Page 99 KX-FG2452CX 12.2.2. Handset • The called base unit is in use. • When you tried to register the cordless handset, the cordless handset and the base unit could not link for some reason, such as interference from electrical appliances. Move the cordless handset and the base unit away from the electrical appliances and try again.

  • Page 100: Error Messages-Report

    KX-FG2452CX 12.3. Error Messages-Report 12.3.1. Journal Report If a problem occurs during fax transmission or reception, one of the following messages will be printed on the sending and jour- nal reports. How to output the Journal Report 1. Press [PRINT REPORT].
  • Page 101 KX-FG2452CX Countermeasure...
  • Page 102 KX-FG2452CX REFERENCE: Test Mode (P.77)
  • Page 103 KX-FG2452CX REFERENCE: Test Mode (P.77)
  • Page 104 KX-FG2452CX REFERENCE: Test Mode (P.77)
  • Page 105 KX-FG2452CX REFERENCE: Test Mode (P.77)
  • Page 106 KX-FG2452CX...
  • Page 107 KX-FG2452CX REFERENCE: Test Mode (P.77)
  • Page 108 KX-FG2452CX REFERENCE: Test Mode (P.77)
  • Page 109 KX-FG2452CX 12.3.2. 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.
  • Page 110 KX-FG2452CX 12.3.2.1. Journal 2 Refer to JOURNAL 2 in Printout Example (P.111). 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.
  • Page 111 KX-FG2452CX 12.3.2.2. Journal 3 Refer to JOURNAL 3 in Printout Example (P.111). Descriptions: (6) ENCODE (9) ERROR LINE(RX) Compression Code: MH/MR When an error occurs while receiving a fax, this shows the number of error lines. (7) MSLT MSLT means Minimum Scan Line Time. Used only at the (10) MAKER CODE factory.
  • Page 112 KX-FG2452CX...
  • Page 113 KX-FG2452CX 12.3.3. Communication Section Find the problem in the table shown below, and refer to the corresponding troubleshooting procedure in Defective Facsimile Section (P.114). Symptom Reference Content Possible cause 1 The paper is not fed properly when faxing. Problem with the feeding mech- Transmit Problem P.114...
  • Page 114 KX-FG2452CX 12.3.3.1. Defective Facsimile Section 12.3.3.1.1. Transmit Problem REFERENCE: (*1): Operation Panel Section (P.156) (*2): ADF (Auto Document Feed) Section (P.128) (*3): Maintenance (P.205) (*4): How to Remove the Gear Block and Separation Roller (P.180) (*5): How to Remove the Operation Board, MIC Board and LCD (P.189)
  • Page 115 KX-FG2452CX 12.3.3.1.2. Sometime There is a Transmit Problem Note: "596: Transmit level set" represents a service code. (Refer to Service Function Table (P.88).)
  • Page 116 KX-FG2452CX 12.3.3.1.3. Receive Problem First confirm whether the recording paper is installed properly or not before starting troubleshooting. (Refer to "Remarks".) Note: • "596: Transmit level set" represents a service code. (Refer to Service Function Table (P.88).) • #06 : Refer to for Program Mode Table (P.123) Fax ring count.
  • Page 117 KX-FG2452CX 12.3.3.1.4. The Unit can copy, but cannot Transmit / Receive REFERENCE: (*1): Test Mode (P.77) (*2): Analog Board Section (P.148)
  • Page 118 KX-FG2452CX 12.3.3.1.5. The unit can copy, but cannot either transmit/receive long distance or interna- tional communications The following two causes can be considered for this symptom. Cause 1: The other party is executing automatic dialing, the call has been received by this unit, and the CED or DIS signal response time is too long.
  • Page 119 KX-FG2452CX (Causes and Countermeasures) Countermeasure Side Echo Communication Problem Example Countermeasure Service Code Sending side Some time is needed to compare the level Add a dummy signal to the beginning of Service code (521) of the receiving and sending signals for the the training signal.
  • Page 120 KX-FG2452CX Fig. c (Countermeasure by Changing the Interval Between CED and DIS) Fig. d (Countermeasure by Ignoring the 1st DIS) <TX side signal> <RX side signal> <Countermeasure> 2nd / 3rd DCS / Training & delayed CFR / FTT at TX side 2nd / 3rd EOP / EOM / MPS &...
  • Page 121 KX-FG2452CX 12.3.3.1.7. How To Record Fax Signal by Using PC Recording FAX signal is one of the useful analysis measures to solve communication problems. The way of recording easily by using PC is shown as follows. 1. Equipment • 1 jig Parts No.

  • Page 122: Remote Programming

    KX-FG2452CX 12.4. 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).
  • Page 123 KX-FG2452CX 12.4.2. Program Mode Table Code Function Set Value Default Remote Set- ting Set date and time mm/dd/yy hh:mm Jan/01/2006 Your logo --------- None Your FAX number --------- None Print sending report 1:ERROR / 2:ON / 3:OFF ERROR FAX ring count...
  • Page 124 KX-FG2452CX Code Function Set Value Default Remote Set- ting Remote turn-on ring number 01~99 Dial tone detect check 1:ON / 2:OFF TAM continuous tone detection 1:ON / 2:OFF FAX auto redial time set 00~99 FAX auto redial line disconnection time set...

  • Page 125: Troubleshooting Details

    KX-FG2452CX 12.5. Troubleshooting Details 12.5.1. Outline Troubleshooting is for recovering quality and reliability by determining the broken component and replacing, adjusting or clean- ing 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 126 KX-FG2452CX 12.5.3. Troubleshooting Items Table ITEM SYMPTOM REFERENCE The document does not feed. No Document Feed P.128 (Auto Document Feeder) Document jam Document Jam P.129 Multiple feed Multiple Document Feed P.130 Skew Document Skew P.131 Recording paper feed The recording paper does not feed.
  • Page 127 KX-FG2452CX 12.5.3.1. Simple Check List SERIAL NO. DATE FUNCTION JUDGEMENT REFERENCE FAX operation Transmission OK / NG Receiving OK / NG Copy operation OK / NG Telephone operation Handset transceiver / receiver OK / NG SP-PHONE sound OK / NG...
  • Page 128 KX-FG2452CX 12.5.4. ADF (Auto Document Feed) Section 12.5.4.1. No Document Feed REFERENCE: (*1): How to Remove the Separation Holder and Exit Roller (P.190) (*2): Installation Position of the Lead Wires (P.191) (*3): How to Remove the Gear Block and Separation Roller (P.180) (*4): Test Mode (P.77)
  • Page 129 KX-FG2452CX 12.5.4.2. Document Jam REFERENCE: (*1): Disassembly and Assembly Instructions (P.170) (*2): Test Mode (P.77) (*3): How to Remove the Separation Holder and Exit Roller (P.190) (*4): Sensor Section (P.157)
  • Page 130 KX-FG2452CX 12.5.4.3. Multiple Document Feed • When using thick paper etc., sometimes the document will not be fed. (*1) REFERENCE: (*1): Installing the Recording Paper (P.72) (*2): How to Remove the Gear Block and Separation Roller (P.180) (*3): Disassembly and Assembly Instructions (P.170) (*4): How to Remove the Separation Holder and Exit Roller (P.190)
  • Page 131 KX-FG2452CX 12.5.4.4. Document Skew REFERENCE: (*1): Maintenance Check Items/Component Locations (P.205) (*2): Disassembly and Assembly Instructions (P.170) (*3): How to Remove the Image Sensor (CIS) (P.174) (*4): Overview (P.65) (*5): We recommend making a copy of the test chart in Test Chart (P.225) and using it.
  • Page 132 KX-FG2452CX 12.5.4.5. The Recording Paper does not Feed REFERENCE: (*1): Installing the Recording Paper (P.72) (*2): How to Remove the Pickup Roller and Antenna (P.187) (*3): Power Supply Board Section (P.153) (*4): Test Mode (P.77) (*5): How to Remove the P.C. Boards and Speaker (P.178) (*6): How to Remove the Gears, Motors and Arms of the Gear Block (P.181)
  • Page 133 KX-FG2452CX 12.5.4.6. Paper Jam REFERENCE: (*1): Jams (P.214) (*2): Maintenance Check Items/Component Locations (P.205) (*3): Disassembly and Assembly Instructions(P.170) (*4): Test Mode (P.77) (*5): Sensors and Switches (P.29) (*6): How to Remove the Pickup Roller and Antenna (P.187)
  • Page 134 KX-FG2452CX 12.5.4.7. Recording Paper Multiple Feed and Skew REFERENCE: (*1): How to Remove the Platen Roller and Lock Lever (P.185) (*2): How to Remove the Pickup Roller and Antenna (P.187) 12.5.4.8. The Sent Fax Data is Skewed REFERENCE: (*1): We recommend making a copy of the test chart in Test Chart (P.225) and using it.
  • Page 135 KX-FG2452CX 12.5.4.10. Received or Copied Data is Expanded REFERENCE: (*1): Document feeder/recording paper feeder/scanner glass cleaning (P.215) (*2): Disassembly and Assembly Instructions (P.170) (*3): How to Remove the Separation Holder and Exit Roller (P.190) (*4): We recommend making a copy of the test chart in Test Chart (P.225) and using it.
  • Page 136 KX-FG2452CX 12.5.4.11. A Blank Page is Copied REFERENCE: (*1): Test Mode (P.77) (*2): Thermal Head (P.24) (*3): How to Remove the Thermal Head (P.175) (*4): We recommend making a copy of the test chart in Test Chart (P.225) and using it.
  • Page 137 KX-FG2452CX...
  • Page 138 KX-FG2452CX 12.5.4.12. A Blank Page is Received REFERENCE: (*1): Test Mode (P.77) (*2): Check Sheet for Signal Route (P.148) (*3): A Blank Page is Copied (P.136) 12.5.4.13. Black or White Vertical Line REFERENCE: (*1): We recommend making a copy of the test chart in Test Chart (P.225) and using it.
  • Page 139 KX-FG2452CX 12.5.4.14. Black or White Lateral Line on Print Out REFERENCE: (*1): Test Mode (P.77) (*2): How to Remove the Gears, Motors and Arms of the Gear Block (P.181) (*3): Installation Position of the Lead Wires (P.191) (*4): Disassembly and Assembly Instructions (P.170) (*5): We recommend making a copy of the test chart in Test Chart (P.225) and using it..
  • Page 140 KX-FG2452CX 12.5.4.15. An Abnormal Image is Printed REFERENCE: (*1): Test Mode (P.77) (*2): Check Sheet for Signal Route (P.148) (*3): How to Remove the Thermal Head (P.175) (*4): We recommend making a copy of the test chart in Test Chart (P.225) and using it.
  • Page 141 KX-FG2452CX 12.5.5. 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.
  • Page 142 KX-FG2452CX 12.5.5.1. Digital Block Diagram You also need to check the signal lines listed here [List 1] when the unit fails to boot up the system. Those signal lines should remain normal. Other signal lines are not directly related to that failure even if they have faults or troubles.
  • Page 143 KX-FG2452CX Normal Wave Patterns Remarks: When you use an oscilloscope to judge whether a signal to be tested is normal or NG, perform the signal check in exactly the same order as in [List 1]. (If the ASIC fails to access the FLASH ROM, the ASIC cannot access DRAM normally.) The digital circuit actually operates according to the timing combinations of these signals.
  • Page 144 KX-FG2452CX I/O and Pin No. Diagram...
  • Page 145 KX-FG2452CX After the power is turned on, the ASIC initializes and checks each IC. The ROM, DRAM, and modem are checked. If initialization fails for the ICs, the system will not boot up. In this case, please find the cause as follows.
  • Page 146 KX-FG2452CX Other NG example while the power is ON and the LCD displays the following.
  • Page 147 KX-FG2452CX 12.5.5.2. NG Example...
  • Page 148 KX-FG2452CX 12.5.6. 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.
  • Page 149 KX-FG2452CX...
  • Page 150 KX-FG2452CX 12.5.6.2. Defective ITS (Integrated Telephone System) Section 1. No handset transmission / reception and no monitor reception Perform a signal test in the ITS or the NCU section and locate a defective point (where the signal disappears) on each route between the handset microphone and telephone line (sending), or between the telephone line and the handset speaker (receiv- ing), or between the microphone and the telephone line (sending), or between the telephone line and the speaker (receiving).
  • Page 151 KX-FG2452CX 12.5.7. Digital Speakerphone The digital speakerphone has different features from the analog speakerphone. The analog speakerphone switches between Tx or Rx. Either Tx or Rx is able to pass through a telephone line or speaker, depending on the Tx and Rx signal (voice) level. The higher-level signal (either TX or RX) can pass through the route.
  • Page 152 KX-FG2452CX Note: Check to the SP-Phone Rx/Tx signal routes. (Refer to Check Sheet for Signal Route (P.148)).
  • Page 153 KX-FG2452CX 12.5.8. Power Supply Board Section 12.5.8.1. Key Components for Troubleshooting Check the following parts first: F101, D101-D104, C106, Q101and IC101. 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.
  • Page 154 KX-FG2452CX 12.5.8.2. Troubleshooting Flow Chart...
  • Page 155 KX-FG2452CX 12.5.8.3. Broken Parts Repair Details (D101, D102, D103, D104) Check for a short-circuit in terminal 4. If D101, D102, D103 and D104 are short-circuits, F101 will melt (open). In this case, replace all of the parts (D101, D102, D103, D104, F101).
  • Page 156 KX-FG2452CX 12.5.9. Operation Panel Section 12.5.9.1. No Key Operation REFERENCE: (*1): Test Mode (P.77) 12.5.9.2. No LCD Indication REFERENCE: (*1): Test Mode (P.77) (*2): How to Remove the Operation Board, MIC Board and LCD (P.189)
  • Page 157 KX-FG2452CX 12.5.10. Sensor Section Refer to Sensors and Switches (P.29) for the circuit descriptions. The Test Function makes the sensor circuit check easier. (Refer to Test Mode (P.77).) For example, as for "FILM END/COVER OPEN SENSOR", "CO" is turned ON/OFF on the display when you open or close the cover.
  • Page 158 KX-FG2452CX 12.5.10.5. Check the Film End Sensor (SW1003)......"CHECK FILM" 12.5.10.6. Check the Motor Position Sensor (SW1004)......"CALL SERVICE2"...
  • Page 159 KX-FG2452CX 12.5.11. CIS (Contact Image Sensor) Section Note: • (*1): Test Mode (P.77) • Refer to Scanning Block(P.26).
  • Page 160 KX-FG2452CX 12.5.12. Thermal Head Section Note: Refer to Thermal Head (P.24).
  • Page 161 KX-FG2452CX 12.5.13. Cordless Section 12.5.13.1. Battery won’t Charge (Digital, 12.5.13.3. No Voice Reception Interface, Analog Board) 12.5.13.2. Battery won’t Charge (Handset) REFERENCE: (*1): Check Sheet for Signal Route (P.148).

  • Page 162: No Voice Transmission

    KX-FG2452CX 12.5.13.4. No Voice Transmission 12.5.14. Check Link REFERENCE: Flash Memory is IC601. DSP is IC501. REFERENCE: (*1): Refer to Finding out the Defective Part (P.163). (*1): Check Sheet for Signal Route (P.148). REFERENCE: (*1): Check the RF Part (P.163).
  • Page 163 KX-FG2452CX 12.5.15. Check the RF Part 12.5.15.1. Finding out the Defective Part 1. Prepare Regular HS (*1) and Regular BU (*2). a. Re-register regular HS (Normal mode) to Base unit (to be checked). If this operation fails in some ways, the Base Unit is defective.
  • Page 164 KX-FG2452CX 12.5.15.1.2. RF Check Flowchart Each item (1 ~ 6) of RF Check Flowchart corresponds to Check Table for RF Part (P.165). Please refer to the each item.
  • Page 165 KX-FG2452CX 12.5.15.1.3. Check Table for RF Part Item BU (Base Unit) Check HS (HandSet) Check Link Confirmation Normal 1. Register Regular HS to BU (to be 1. Register HS (to be checked) to Regular checked). 2. Press [Talk] key of the Regular HS to 2.
  • Page 166 KX-FG2452CX 12.5.15.1.4. Test Range Check Circuit block which range is defective can be found by the following check. Item BU (Base Unit) Check HS (HandSet) Check Range Confirmation TX TEST 1. Register Regular HS to BU (to be checked). 1. Register HS (to be checked) to Regular BU.
  • Page 167 KX-FG2452CX 12.5.15.1.5. RF-DSP Interface Signal Wave Form...

  • Page 168: Check Handset Transmission

    KX-FG2452CX 12.5.15.2. Check Handset Transmission REFERENCE: Check Sheet for Signal Route (P.148). 12.5.15.3. Check Handset Reception REFERENCE: Check Sheet for Signal Route (P.148). Note: When checking the RF UNIT, Refer to Check the RF Part (P.163) 12.5.15.4. Check Caller ID REFERENCE: Bell Detection Circuit (P.42)

  • Page 169: Service Fixture & Tools

    KX-FG2452CX 13 Service Fixture & Tools...

  • Page 170: Disassembly And Assembly Instructions

    KX-FG2452CX 14 Disassembly and Assembly Instructions Please remove the Paper Support Spring, Paper Tray and Ink Film before disassembling. 14.1. General Section...

  • Page 171: Disassembly Flowchart

    KX-FG2452CX 14.2. Disassembly Flowchart 14.2.1. Upper Cabinet Section REFERENCE: A-1: How to Remove the Image Sensor (CIS) (P.174) A-2: How to Remove the Thermal Head (P.175) 14.2.2. Lower Cabinet Section REFERENCE: B-1: How to Remove the Bottom Frame (P.177) B-2: How to Remove the P.C. Boards and Speaker (P.178) B-3: How to Remove the Power Supply Board and AC Cord (P.179)
  • Page 172 KX-FG2452CX 14.2.3. Back Cover Section REFERENCE: C-1: How to Remove the Back Cover (P.184) C-2: How to Remove the Platen Roller and Lock Lever (P.185) C-3: How to Remove the Pickup Roller and Antenna (P.187) 14.2.4. Operation Panel Section REFERENCE: D-1: How to Remove the Operation Panel (P.188)
  • Page 173 KX-FG2452CX 14.2.5. Handset Section REFERENCE: E-1: How to Remove the Handset Board (P.197)

  • Page 174: Disassembly Procedure

    KX-FG2452CX 14.3. Disassembly Procedure 14.3.1. How to Remove the Image Sensor (CIS)
  • Page 175 KX-FG2452CX 14.3.2. How to Remove the Thermal Head...
  • Page 176 KX-FG2452CX...
  • Page 177 KX-FG2452CX 14.3.3. How to Remove the Bottom Frame...
  • Page 178 KX-FG2452CX 14.3.4. How to Remove the P.C. Boards and Speaker...
  • Page 179 KX-FG2452CX 14.3.5. How to Remove the Power Supply Board and AC Cord...
  • Page 180 KX-FG2452CX 14.3.6. How to Remove the Gear Block and Separation Roller...
  • Page 181 KX-FG2452CX 14.3.7. How to Remove the Gears, Motors and Arms of the Gear Block...
  • Page 182 KX-FG2452CX...
  • Page 183 KX-FG2452CX 14.3.8. How to Remove the Charger Case...
  • Page 184 KX-FG2452CX 14.3.9. How to Remove the Back Cover...
  • Page 185 KX-FG2452CX 14.3.10. How to Remove the Platen Roller and Lock Lever...
  • Page 186 KX-FG2452CX...
  • Page 187 KX-FG2452CX 14.3.11. How to Remove the Pickup Roller and Antenna...
  • Page 188 KX-FG2452CX 14.3.12. How to Remove the Operation Panel...
  • Page 189 KX-FG2452CX 14.3.13. How to Remove the Operation Board, MIC Board and LCD...
  • Page 190 KX-FG2452CX 14.3.14. How to Remove the Separation Holder and Exit Roller...
  • Page 191 KX-FG2452CX 14.3.15. Installation Position of the Lead Wires 14.3.15.1. Lower Section...
  • Page 192 KX-FG2452CX...
  • Page 193 KX-FG2452CX...
  • Page 194 KX-FG2452CX...
  • Page 195 KX-FG2452CX 14.3.15.2. Operation Panel Section...
  • Page 196 KX-FG2452CX 14.3.15.3. Back Cover Section...
  • Page 197 KX-FG2452CX 14.3.16. How to Remove the Handset Board...
  • Page 198 KX-FG2452CX 14.3.16.1. How to Replace the Handset LCD...

  • Page 199: Measurements And Adjustments

    KX-FG2452CX 15 Measurements and Adjustments 15.1. Things to Do after Replacing IC 15.1.1. X201 (Handset RF) Check Equipment: Frequency counter Check Point for measurement: BCK (Handset) Checking tolerance: 13.824MHz ± 100Hz (Handset) 15.1.1.1. Check and Adjust X201 (Handset RF) Frequency 1.
  • Page 200 KX-FG2452CX 15.1.2. Adjust Battery Low Detector Voltage (Handset) After Handset's DSP (IC201) or EEPROM (IC202) replacement, Re-writing Battery Low voltage to EEPROM is required. With following Handset Adjustment Flow, adjust DC power supply and DC voltmeter by the procedure below.
  • Page 201 KX-FG2452CX 15.1.3. Adjustment Mode Flow Chart for Handset Cross Reference (*1) Adjust Battery Low Detector Voltage (Handset) (P.200) Note: (*2) These are the default values. (*3) These values may not be fixed depending on the battery strength. (*4) Refer to the table below if using Spectrum Analyzer for checking.

  • Page 202: Cordless Base Reference Drawing

    KX-FG2452CX 15.2. Cordless Base Reference Drawing When connection the Simulator and Equipment for checking, please refer to below. BMC-CLK (BCK) Frequency Counter (*1) PFUP1580Z R640 ANT_MAIN R633 C826 C805 C505 R618 C733 R619 RA801 GND_ VCC_ C721 Q701 R720 IC801...

  • Page 203: Handset Reference Drawing

    KX-FG2452CX 15.3. Handset Reference Drawing When connecting the Simulator and Equipment for checking, please refer to the illustration below. SHIELD RECEIVER SP_PHONE IC249 Q221 Q231 Q243 Q361 Q363 Q362 Note: (*1) is referred to No.3 of Check Table for RF Part (P.165)

  • Page 204: Frequency Table

    KX-FG2452CX 15.4. Frequency Table Channel TX/RX Frequency TEST MODE Frequency (MHz) (MHz) Channel TX/RX Frequency TEST MODE Frequency 2445.507861 2445.318018 (MHz) (MHz) 2446.401709 2446.211865 2400.914355 2400.724512 2447.291602 2447.101758 2401.808203 2401.618359 2448.185449 2447.995605 2402.698096 2402.508252 2449.075342 2448.885498 2403.591943 2403.402100 2449.969189 2449.779346 2404.481836...

  • Page 205: Maintenance

    KX-FG2452CX 16 Maintenance 16.1. Maintenance Items and Component Locations 16.1.1. Outline Maintenance and repairs are reformed using the following steps. 1. Periodic maintenance 4. Determine causes Inspect the equipment periodically and if necessary, clean Determine the causes of the equipment problem by trouble- any contaminated parts.
  • Page 206 KX-FG2452CX 16.1.2.1. 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 Document feeder/recording paper oughly. feeder/scanner glass cleaning (P.215).

  • Page 207: Gear Section

    KX-FG2452CX 16.2. Gear Section This model provides a motor-driven gear mechanism for transmitting/copying documents and printing fax data. In this chapter, you will see how the gears work to select and operate a mode and how the gear section, sensors and rollers mechanically work during the main operations (FAX transmission, FAX reception and Copy).
  • Page 208 KX-FG2452CX 16.2.2. Mode Operation Once a mode is selected, the Drive Motor Gear rotates counterclockwise (CCW) and then the controlling positions of Swing Gears A, B and C, D, E determine which gears convey their drive power in each mode. See “Sensor Location” in Sensors and Switches (P.29).
  • Page 209 KX-FG2452CX C. Assist mode (See Fig. C.): The Swing Gear D engages with the next gear to drive Pickup Roller. The Swing Gear B engages with the next gear to drive Platen Roller gear and Ribbon Drive Gear. The Swing Gear C engages with the next gear to drive Paper Exit Roller Gear.
  • Page 210 KX-FG2452CX E. Copy mode (See Fig. E.): “Copy mode” = “Transmit mode“ + “Receive mode“ The Swing Gear A engages with the next gear to drive Document Separation Roller and Document Exit Roller. The Swing Gear B engages with the next gear to drive Platen Roller gear and Ribbon Drive Gear.
  • Page 211 KX-FG2452CX 16.2.3. Mechanical Movements in the Main Operations (transmitting documents, receiving faxes and copying) 16.2.3.1. Idle Status Note: • See “Sensor Locations” in Sensors and Switches (P.29). • CW..clockwise • CCW..counterclockwise...
  • Page 212 KX-FG2452CX 16.2.3.2. Transmitting Documents 16.2.3.3. Receiving Fax REFERENCE: Sensor Section (P.157). Note: See “Sensor Locations” in Sensors and Switches (P.29).
  • Page 213 KX-FG2452CX 16.2.3.4. Copying Note: See “Sensor Locations” in Sensors and Switches (P.29). REFERENCE: Sensor Section (P.157)

  • Page 214: Jams

    KX-FG2452CX 16.3. Jams 3. Turn the gear of the blue core ( ) in the direction of the arrow until the ink film is tight ( ) and at least one layer 16.3.1. Recording Paper Jams of ink film is wrapped around the blue core ( 16.3.1.1.

  • Page 215: Cleaning

    KX-FG2452CX 16.3.2. Document Jams - sending 4. Close the back cover securely by pushing down on the dotted area at both ends ( ), then close the front cover 1. Open the front cover. Remove the jammed document carefully ( securely ( 5.
  • Page 216 KX-FG2452CX 5. Close the back cover securely by pushing down on the 2. Open the front cover ( ), push the green lever ( dotted area at both ends ( ), then close the front cover then open the back cover ( securely ( 3.

  • Page 217: Thermal Head Cleaning

    KX-FG2452CX 16.4.2. Thermal Head Cleaning If smudges or black/white lines appear on a copied/received 4. Clean the thermal head ( ) with a cloth moistened with document, check whether there is dust on the thermal head. isopropyl rubbing alcohol, and let it dry thoroughly.

  • Page 218: Miscellaneous

    KX-FG2452CX 17 Miscellaneous 17.1. Terminal Guide of the ICs, Transistors and Diodes 17.1.1. Digital Board 17.1.2. Analog Board...
  • Page 219 KX-FG2452CX 17.1.3. Operation Board / Microphone Board 17.1.4. Power Supply Board 17.1.5. Interface Board...
  • Page 220 KX-FG2452CX 17.1.6. Handset Board...

  • Page 221: How To Replace The Flat Package Ic

    KX-FG2452CX 17.2. 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 222: Flat Package Ic Installation Procedure

    KX-FG2452CX 17.2.3. 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 223: Test Chart

    KX-FG2452CX 17.3. Test Chart 17.3.1. ITU-T No.1 Test Chart...
  • Page 224 KX-FG2452CX 17.3.2. ITU-T No.2 Test Chart...
  • Page 225 KX-FG2452CX 17.3.3. Test Chart...

  • Page 226: Schematic Diagram

    KX-FG2452CX 18 Schematic Diagram 18.1. Digital Board (PCB1) +3.3VD +3.3VD +3.3VD IC502 IC504 IC503 A[0] A[11] D[0] A[11] VCC1 VSS2 +3.3VD +5VD A[1] A[9] A[10] D[1] D[0] D[7] A[9] A[10] A[2] A[8] D[2] D[1] D[6] A[8] RBA[0] D[7] D[2] D[5]...
  • Page 227 VAA_S DGND6 DVAA VC_S AGND5 VREF_S RESERVED9 +3.3VD R601 R603 22k 4.7k Q602 (12) Q601 C741 VIDEO C606 100n +5VD +5VD EYESYNC EYECLK EYEXY R756 R757 H/S TX FAX TX H/S RX FAX RX R748 TO CIS KX-FG2452CX: Digital Board_Main...
  • Page 228 KX-FG2452CX L902 C952 SDIO C990 L905 SDATA RA901 C983 C991 C984 OSC_IN 100p SCLK C938 R940 R919 VCC_PLL2A TX_DATA C977 GND_ISO1 VCC_PLL2B R930 RX_GAIN GND_ISO2 RXEN R931 RX_EN L911 C918 TXEN 2.7n IC901 C939 R943 TX_EN VCC_RF VCC_PLL1B C940 VCC_IF2...
  • Page 229 C873 C877 HSTX 2.2k 100n C_IN BELL_TX BELL_TX (10) (11) (12) R830 (13) BELL_TX R834 10k CHARGE CH_CTL IC806 CBUSY1 R836 G(ENB) S_ENB R833 R853 CBUSY2 R840 SDATA R852 CCLK R854 R842 SCLK R848 R843 SDIO KX-FG2452CX: Digital Board_Cordless Base...

  • Page 230: Analog Board (Pcb2)

    KX-FG2452CX 18.2. Analog Board (PCB2) +5VA PC105 R174 R173 PC106 C105 R171 Q106 R168 Q108 Q109 R177 6.8k D111 C107 +5VA1 C115 390p R118 R125 C118 100n R112 C112 100n R114 R113 3.9k C113 C184 +2.0V C121 C122 150p +5VA...
  • Page 231 KX-FG2452CX +5VA +5VA PC103 D107 C134 R161 D108 Q104 FAX or H/S TALK TX C157 R143 FAX or H/S TALK RX 680p D112 C156 680p Q105 L101 C109 T101 50 4.7u TO TEL LINE LF101 CN102 POS101 L102 RL101 +5VA...

  • Page 232: Operation Board (Pcb3) / Mic Board (Pcb9)

    KX-FG2452CX 18.3. Operation Board (PCB3) / MIC Board (PCB9)

  • Page 233: Power Supply Board (Pcb4)

    KX-FG2452CX 18.4. Power Supply Board (PCB4)

  • Page 234: Interface Board (Pcb5)

    5.6k TO POWER SUPPLY CN401 +24V Q402 R402 R403 Q403 CN403 1.5k CN405 IC401 D407 D408 COMMON TO MOTOR CHARGE CHARGE- F403 Q404 Q405 800m R405 3.3k CN407 L407 1 CHARGE(+) L408 2 CHARGE(-) TO CHARGE TERMINAL KX-FG2452CX: Interface Board...

  • Page 235: Sensor Board (Pcb6)

    CN1001 SW1002 REED Sensor PTOP COVEROPEN COVEROPEN COMMON SW1001 PTOP KX-FG2452CX: Sensor Board 18.7. Film End Sensor Board (PCB7) FLMDET FILM Sensor SW1003 KX-FG2452CX: Film End Sensor Board 18.8. Motor Position Sensor Board (PCB8) SW1004 KX-FG2452CX: Motor Position Sensor Board...

  • Page 236: Handset Board (Pcb100)

    KX-FG2452CX 18.9. Handset Board (PCB100) 18.9.1. Handset_Main to RF PART C246 K0.1 OSC_IN RSSI TX_DATA MOD_EN RX_EN TX_EN RX_GAIN RX_DATA SHCTRL RF_RESET (10) IC249 (11) SDATA (12) SCLK SDIO RESET R249 (13) VBATT2 FLASH_BOOT (14) (15) (16) (17) (18) (19)
  • Page 237 L373 CHG1 D361 Q361 R241 47uH L351 2.6V BATTP 2.6V REG D373 IC371 IC373 BATTM CHG2 L352 VOUT Q373 ON/OFF Q363 DC/DC IC374 R364 3.0V R227 220K Q362 DC/DC_OUT (46) 2.0V RESET (47) NC: No Components KX-FG2452CX : Handset Board_Main...
  • Page 238 KX-FG2452CX 18.9.2. Handset_RF Part...

  • Page 239: Printed Circuit Board

    C508 C507 R519 C506 R529 RESET1 C765 IC501 C716 IC701 R530 C517 C520 C521 C518 C530 C522 C539 R514 R525 C746 C528 C526 C741 C574 C726 R701 +2.5VBAT R628 +3.3VBAT C626 R631 C627 R630 R627 KX-FG2452CX: Digital Board (Bottom View)
  • Page 240 D702 C783 C635 +2.5VBAT R636 R601 CN505 L717 R637 CN508 R626 C628 C608 R629 R608 +3.3VBAT_ VIDEO KX-FG2452CX: Digital Board (Component View) Part) L902 L905 C960 R919 C983 C956 C952 C990 R930 R909 C984 C961 RA901 C937 C991 C922 C977...

  • Page 241: Analog Board (Pcb2)

    R174 R162 Q107 R182 R117 R113 R114 R125 R171 C118 C184 L113 C106 R169 C182 C183 Q108 C105 C103 R191 R168 R167 R151 C110 Q111 C187 R194 R196 C185 +5VA R195 R192 R193 C188 Q112 PFUP1581Z KX-FG2452CX: Analog Board (Bottom View)
  • Page 242 KX-FG2452CX 19.2.2. Component View SA102 LF101 AUTO-CH PCB-CH D106 J101 RL101 R103 J102 PC102 R104 C159 J104 PC103 D108 C101 C166 PC106 J105 PC105 D103 D102 R110 BAT151 IC103 PFUP1581Z KX-FG2452CX: Analog Board (Component View)

  • Page 243: Operation Board (Pcb3) / Mic Board (Pcb9)

    KX-FG2452CX 19.3. Operation Board (PCB3) / MIC Board (PCB9) PFUP1582Z PFUP1582Z MIC- LED302 MIC+ JJ321 JJ320 SW314 SW313 JJ319 JJ318 JJ317 JJ310 JJ304 JJ315 JJ306 JJ314 JJ305 JJ303 JJ302 JJ301...

  • Page 244: Power Supply Board (Pcb4)

    KX-FG2452CX 19.4. Power Supply Board (PCB4) C102 L103 JP104 D107 R110 JP103 R105 C109 C111 JP105 JP102 L102 D105 L201 D201 C211 JP206 JP205 JP204 C201 R230 C217 JP207 CN202...

  • Page 245: Interface Board (Pcb5)

    Q402 CN407 TO CHARGE KX-FG2452CX: Interface Board 19.6. Sensor Board (PCB6) 19.7. Film End Sensor Board (PCB7) PFUP1579Z SW1003 BLACK WHITE KX-FG2452CX: Film End Sensor Board 19.8. Motor Position Sensor Board (PCB8) PFUP1589Z KX-FG2452CX: Sensor Board KX-FG2452CX: Motor position Board...

  • Page 246: Handset Board (Pcb100)

    KX-FG2452CX 19.9. Handset Board (PCB100) 19.9.1. Component View SHIELD RECEIVER SP_PHONE IC249 Q221 Q231 Q243 Q361 Q363 Q362...
  • Page 247 KX-FG2452CX 19.9.2. Flow Solder Side View CN272 CN271 LEFT MENU RIGHT TALK NEXT BACK MUTE DOWN PAUSE HOLD...

  • Page 248: Appendix Information Of Schematic Diagram

    L909 R932 C942 C997 SHIELD KX-FG2452CX: RF Part in Handset Board (Component View) 20 Appendix Information of Schematic Diagram 20.1. 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 249: Cpu Data

    KX-FG2452CX 20.2. CPU Data 20.2.1. IC801 (Digital Board) Description High High_Z 63 RXEN Enable Disable 64 TXEN Enable Disable Description High High_Z 65 RX_GAIN High_Gain Low_gain INT0 High 66 RXI High 67 NC BELL_TX High 68 NC 69 NC 70 RF_RESET...
  • Page 250 KX-FG2452CX 20.2.2. IC201 (Handset Board) Description High High_Z 60 ANT_LED 61 LIGHTED 62 NC Normal Description High High_Z 63 KEYSTROBE Active GNDPA SPOUTP 64 KEYSTROBE Active BCLK RSSI 65 KEYSTROBE Active XOUT 66 KEYSTROBE Active 67 KEYSTROBE Active 10 GND...

  • Page 251: Explanation Of Rf Unit Terminals (Rf Unit)

    KX-FG2452CX 20.3. Explanation of RF unit Terminals (RF Unit) 20.3.1. IC901...

  • Page 252: Exploded View And Replacement Parts List

    KX-FG2452CX 21 Exploded View and Replacement Parts List 21.1. Cabinet, Mechanical and Electrical Parts Location 21.1.1. General Section...
  • Page 253 KX-FG2452CX 21.1.2. Operation Panel Section...
  • Page 254 KX-FG2452CX 21.1.3. Upper Cabinet Section...
  • Page 255 KX-FG2452CX 21.1.4. Back Cover Section...
  • Page 256 KX-FG2452CX...
  • Page 257 KX-FG2452CX 21.1.5. Lower Cabinet Section...
  • Page 258 KX-FG2452CX 21.1.6. Gear Block Section...
  • Page 259 KX-FG2452CX...
  • Page 260 KX-FG2452CX 21.1.7. Handset Section Note: (*1) Attach the spacer (No. 325) to the exact location described above. (*2) This cable is fixed by welding. Refer to How to Replace the Handset LCD (P.198).
  • Page 261 KX-FG2452CX 21.1.8. Screws...
  • Page 262 KX-FG2452CX 21.1.9. Accessories and Packing Materials...

  • Page 263: Replacement Parts List

    KX-FG2452CX 21.2. Replacement Parts List 1. RTL (Retention Time Limited) Ref. Part No. Part Name & Description Remarks Note: PFHG1249Z SPACER, PAD (RUBBER) The marking (RTL) indicates that the Retention Time is PFHR1573Z COVER, SEPARATION HOLDER ABS-HB limited for this item.
  • Page 264 KX-FG2452CX Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks PFUS1553Z LEAF SPRING PS-HB PFUA1081Z CHASSIS ABS+PBT PFDG1015X SPACER POM-HB PFDG1489Z GEAR POM-HB PFKV1143W1 COVER PS-HB PFDG1479Z GEAR POM-HB PFKR1100Z1 GUIDE, RIGHT ABS-HB...
  • Page 265 KX-FG2452CX 21.2.2. Digital Board Parts Ref. Part No. Part Name & Description Remarks Note: L990 G1C1R0KA0096 COIL (1*) When you have replaced IC502 or IC805, adjust X801. Refer to Check and Adjust X801 (Base RF) Frequency (COMPONENTS PARTS) (P.199). RA601...
  • Page 266 KX-FG2452CX Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks R714 ERJ2GEJ471 R852 ERJ2GE0R00 R715 ERJ2GEJ222 2.2k R853 ERJ2GE0R00 R716 ERJ2GEJ272 2.7k R854 ERJ2GEJ101 R717 ERJ2GEJ472X 4.7k R861 ERJ2GE0R00 R718 ERJ2GE0R00 R862 ERJ2GEJ222 2.2k...
  • Page 267 KX-FG2452CX Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks C703 F1G1E562A086 0.0056 C810 ECJ0EB1A104K C704 ECJ0EF1C104Z C811 ECJ0EB1A104K C706 ECJ0EC1H100D C812 ECJ0EB1A104K C707 F2G0J1010042 C813 ECJ0EC1H020C C708 ECJ0EB1H102K 0.001 C814 ECJ0EC1H020C C709 ECJ0EB1C103K 0.01...
  • Page 268 KX-FG2452CX Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks R134 ERJ3GEY0R00 (TRANSISTORS) R151 ERJ3GEYJ222 2.2k Q103 UN521 TRANSISTOR(SI) R163 ERJ3GEYJ473 Q106 B1AAKL000006 TRANSISTOR(SI) R167 ERJ3GEYJ822 8.2k Q107 PQVTDTC143E TRANSISTOR(SI) R168 ERJ3GEYJ682 6.8k...
  • Page 269 KX-FG2452CX Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks SW313 K0H1BA000259 SPECIAL SWITCH (ICs) SW314 K0H1BA000259 SPECIAL SWITCH IC101 PFVIFA5518N SW315 K0H1BA000259 SPECIAL SWITCH IC201 TL431CDBVR SW316 K0H1BA000259 SPECIAL SWITCH IC202 TA7804...
  • Page 270 KX-FG2452CX Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks R234 ERJ3GENF473 (CAPACITORS) (CAPACITORS) C402 ECJ1VF1H104Z C101 ECQU2A104MLA C403 ECJ1VF1H104Z C102 ECQU2A104MLA C404 ECJ1VC1H101J 100P C405 ECJ1VC1H101J 100P C103 DE1E102MN4AL 0.001 C406 ECJ1VB1H102K 0.001...
  • Page 271 KX-FG2452CX Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks IC241 PQWIG2420BXR IC (*2) R222 ERJ2GEJ223 IC371 C0CBCAD00071 R223 ERJ2GEJ224 220k IC373 C0DBAGZ00053 R225 ERJ2GEJ102 IC374 PQVIC61CC20N R226 ERJ2GEJ273X IC381 C0CBCAD00070 R227 ERJ2GEJ224...
  • Page 272 KX-FG2452CX Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks C305 ECUE1C103KBQ 0.01 PQZZ2K6Z EXTENSION CORD, 2 PIN C306 F1G1A1040003 EC10 PFZZ18K2Z EXTENSION CORD, 18 PIN C314 F1G1C183A081 0.018 EC11 PQZZ11K8Z EXTENSION CORD, 11 PIN...

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