KX-FT937LA-B 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-FT937LA-B 1.1.2. How to recognize that Pb Free Solder is Used P.C.Boards marked as “PbF” use Pb Free solder. (See the figure below.) (Example: Digital board) Note: The “PbF” marked may be found on different areas of the same P.C.Board,depending on manufacture date.
KX-FT937LA-B 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-FT937LA-B 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...
KX-FT937LA-B 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).
KX-FT937LA-B 3 Specifications Applicable Lines: Public Switched Telephone Network Document Size: Max. 216 mm in width Max. 600 mm in length Effective Scanning Width: 208 mm 216 × max. 30 m roll Recording Paper Size: Effective Printing Width: 208 mm Transmission Time* Approx.
KX-FT937LA-B 4 General/Introduction 4.1. Optional Accessories Model No. Item Specifications/Usage 216 mm × 30 m roll, with 25 mm core KX-A106 Standard thermal recording paper* Use only the included or specified recording paper. Using other recording paper may affect print quality and/or cause exces- sive wear to the thermal head.
KX-FT937LA-B 6.2. General Block Diagram The following is an outline of each device IC on the digital board. (Refer to General Block Diagram (P.13).). 1. ASIC (IC1) Composed mainly of an address decoder and a modem control. Controls the general FAX operations.
KX-FT937LA-B 6.2.1. General Block Diagram...
KX-FT937LA-B 6.3. Control Section 6.3.1. ASIC (IC1) 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.
KX-FT937LA-B SIGNAL POWER SUPPLIED DESCRIPTION VOLTAGE VDD (3.3V) ----- POWER SOURCE (+3.3V) MIDAT/IOP 3.3V PORT (TONE1EN) MICLK/IOP 3.3V OUTPUT PORT (TONE2EN) MILAT/IOP 3.3V PORT (HSRXEN) 20KOSC/IOP 3.3V OUTPUT PORT (PWRCNT) XWAIT 3.3V INPUT PORT (HOOK) HSTRD/IOP 3.3V INPUT PORT (TEST) HSTWR/IOP 3.3V...
KX-FT937LA-B SIGNAL POWER SUPPLIED DESCRIPTION VOLTAGE STB2 3.3V STROBE SIGNAL OUTPUT TO THERMAL HEAD STB3 3.3V OUTPUT PORT (NC) XRESET 3.3V RESET INPUT VDD (3.3V) ----- POWER SOURCE (+3.3V) POWER SOURCE (GND) POWER SOURCE (GND) VDD (3.3V) ----- POWER SOURCE (+3.3V) XORESET 3.3V...
KX-FT937LA-B 6.3.2. Flash Memory (IC2) This 512KB ROM (FLASH MEMORY) carries a common area of 32KB and bank areas which each have 8KB (BK4~BK63). The addresses from 0000H to 7FFFH are for the common area and from 8000H to 9FFFH are for the bank areas.
KX-FT937LA-B 6.3.5. RTC Back up Circuit 1. Function This unit has a lithium battery (BAT1) which works for the Real Time Clock (RTC, Integrated into ASIC:IC1). The RTC continues functioning, even when the power switch is OFF, backed up by a lithium battery.
KX-FT937LA-B 6.3.6. 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 IC1 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.
KX-FT937LA-B 6.4. Facsimile Section 6.4.1. Image Data Flow During Facsimile Operation Copy (Fine, Super-Fine, Photo) 1. Line information is read by CIS (to be used as the reference white level) via route (1), and is input to IC1. Refer to Block Dia- gram (P.21)
KX-FT937LA-B 6.4.3. Thermal Head 1. Function This unit utilizes state of the art thermal printer technology. The recording paper (roll paper) is chemically processed. When the thermal head contacts this paper it emits heat momen- tarily, and black dots (appearing like points) are printed on the paper. If this continues, letters and/or diagrams appear, and the original document is reproduced.
KX-FT937LA-B 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, a light source, and photoelectric conversion elements. When an original document is inserted and the start button pressed, pin 129 of IC1 goes to a high level and the transistor Q14 turns on.This applies voltage to the light source to light it.
KX-FT937LA-B 6.4.5. Stepping Motor Drive Circuit 1. Function One individual stepping motor is used for transmission and reception. It feeds the document or recording paper synchronized for reading or printing. 2. Circuit Operation During motor drive, ASIC IC1 pin 124 becomes a high level, and Q2 and Q1 go ON as a result. +24 V is supplied tothe motor coil.
KX-FT937LA-B 6.5. Sensors and Switches All of the sensors and switches are shown below. Sensor Circuit Sensor Sensor or Switch Name Message Error Location DIGITAL Motor Position Sensor [CALL SERVICE] Cutter Position Sensor [PAPER JAMED] ANALOG Recording Paper Sensor [CHECK COVER] and [OUT OF PAPER] Hook SW ————...
KX-FT937LA-B 6.5.1. Motor Position Sensor This sensor is a detection switch for recording the position of the CAM. Digital Board Signal (IC1-119 Pin) Home position Low level Other High level 6.5.2. Cutter Position Sensor Digital Board Signal (IC1-131 Pin) Home position...
KX-FT937LA-B 6.5.4. Hook Switch (SW2) When the handset is lifted, the switch turns ON, and the signal at pin 43 of IC1 becomes low. When the handset is returned, the switch turns OFF, and the signal at pin 43 of IC1 becomes high.
KX-FT937LA-B 6.5.6. Document Top Sensor (SW39) When a document is brought to the read position, the SW becomes ON, and the input signal of IC1-5 pin (Operation) becomes a low level. When there is no document at the read position, the SW becomes OFF, and the input signal of IC1-5 pin (Operation) becomes a high level.
KX-FT937LA-B 6.6. Modem Section 6.6.1. Function The unit uses a 1 chip modem (IC5) 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.
KX-FT937LA-B 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.
KX-FT937LA-B 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.
KX-FT937LA-B 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 4800 bit/s, V.27 ter 0,1,0,0 V.27 ter 1,0,0,0 V.29 9600 bit/s, V.29 1,1,0,0 V.27 ter and V.29...
KX-FT937LA-B Bit No. DIS/DTC Reserved for future recording width capability. 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”: neritic based resolution...
KX-FT937LA-B b. Redundancy Compression Process Coding Mode This unit uses one-dimensional MH format.
KX-FT937LA-B 6.6.2. Modem Circuit Operation The modem (IC5) has all the hardware satisfying the CCITT standards mentioned previously. When the ASIC IC1 (61) is brought to a low level, the modem (IC5) is chip-selected and the resistors inside IC are selected by the select signals from ASIC (IC1) ADR0-ADR4.
KX-FT937LA-B 6.7. NCU Section 6.7.1. General It is composed of bell detection circuit, pulse dial circuit, line amplifier, sidetone circuits. 6.7.2. Bell Detection Circuit 1. Circuit Operation The signal waveform for each point is indicated below. The signal (low level section) input to pin 23 of ASIC IC1 on the digital board.
KX-FT937LA-B 6.7.5. Line Amplifier and Side Tone Circuits 1. Circuit Operation The reception signal received as output from line transformer T1 is given as input to R81, C17, R13 and IC2(2). Then it is input to the reception system at an amplifier gain of 2.5 dB from pin (2).
KX-FT937LA-B 6.7.7. Calling Line Identification Circuit 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.
KX-FT937LA-B 6.7.8. Calling Line Identification Circuit (DTMF) 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 before the first ring signal. The data from the telephone exchange is sent by DTMF signal.
KX-FT937LA-B 6.8. ITS (Integrated Telephone System) AND MONITOR SECTION 6.8.1. General The general ITS operation is performed by the modem IC5. The alarm tone, the key tone, the calling tone and the beep are output from the ASIC IC1 (digital board).
(IC1) and ASIC (IC1: on the DIGITAL BOARD). The key matrix table is shown below. (Chip on board type) ASIC CN206 GATE ARRAY KEYS KIN0~7 MATRIX XLED8, 9 XLED13 READ POSITION SENSOR DOCUMENT SENSOR DIGITAL BOARD OPERATION BOARD KX-FT937LA-B OPERATION BOARD: BLOCK DIAGRAM...
KX-FT937LA-B 6.11. LCD Section The Gate Array IC(IC1) works only for writing the ASCII code from the data bus (D4~D7). V0 is supplied for the crystal drive. R25, R24, R15 and R17 are density control resistors. Consequently, in this unit, the timing (positive clock) is generated by the LCD interface circuitry in the gate array (IC1).
KX-FT937LA-B 6.12. Power Supply Board Section This power supply board uses the switching regulator method. Block Diagram Input Input Rectifier Circuit Output Circuit Kick-on Circuit Voltage Circuit Over Converter voltage Circuit A-B Voltage Wave Form Surge 9~6V absorber circuit Output...
KX-FT937LA-B 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 .
KX-FT937LA-B [Surge Absorber Circuit] This circuit is for absorbing surge voltage generated by the Q1. [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 transis- tor.
KX-FT937LA-B 7 Location of Controls and Components 7.1. Overview (1) Speaker (2) Document guides (3) Paper stacker • The paper stacker may not be shown in all illustrations in these operating instructions. (4) Document feeder tray (5) Top cover (6) Document exit...
KX-FT937LA-B 7.2. Control Panel Buttons (1) [CALLER ID] (11) [COPY] • To use Caller ID features. • To copy a document. (2) [STOP] (12) [MIC] • To stop an operation or programming session. • The built-in microphone. • To erase a character/number. Press and hold to erase all (13) [TONE] •...
KX-FT937LA-B 8 Installation Instructions 8.1. Installation Space 8.2. Connections The space required to install the unit is shown below. Important: • The unit will not function when there is a power failure. The dimensions given are necessary for the unit to operate To make calls in emergency situations, you should con- efficiently.
KX-FT937LA-B 8.3. Installing the Recording Paper 1. Open the top cover by pressing the top cover release but- 5. Close the top cover securely by pushing down on both sides. ton ( ). 2. Install the recording paper. 6. Press [FAX/START] to cut the paper.
KX-FT937LA-B 9 Operation Instructions 9.1. Setting Your Logo Your logo will be printed on the top of each page sent from your unit. The logo can be your name or the name of your company. Note: Refer to Other (P.9) for display message.
KX-FT937LA-B To select characters with dial keypad press  3 times. To change uppercase or lowercase letters Pressing the [ ] button will change to uppercase or lower- case letters alternately. 1. Press  2 times. 2. Press  3 times.
KX-FT937LA-B 10 Test Mode 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.56).) first, then operate the below test items.
KX-FT937LA-B Note: The numbers in the boxes (XXX) indicate the keys to be input for the various test modes. 10.1. DTMF Single Tone Transmit Selection When set to ON (=1), the 12 keys and transmission frequencies When set to OFF (=2), the 12 keys and transmission frequen- are as shown.
KX-FT937LA-B 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.
KX-FT937LA-B 11.1.3. Service Function Table Code Function Set Value Effective Default Remarks Range Pause time X 100 msec 001~600 ---------- Flash time X 10 ms 01~99 ---------- Dial speed select 1: 10 pps 1, 2 ---------- 2: 20 pps VOX time...
KX-FT937LA-B 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.
KX-FT937LA-B 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.
KX-FT937LA-B 11.2. The Example of the Printed List 11.2.1. User Mode (Example of a printed out list) Note: The above values are the default values.
KX-FT937LA-B 11.2.2. Service Mode Settings (Example of a printed out list) Note: The above values are the default values.
KX-FT937LA-B 11.2.3. History (Example of a printed out list) 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.63).
KX-FT937LA-B 18.104.22.168. Descriptions of the History Report (31) Not used (1) SOFTWARE VERSION FLASH ROM version (32) NUMBER OF DIVIDED PRINTING IN FAX RECEPTION (2) SUM The number of faxes received that were divided into more than FLASH ROM internal data calculation.
KX-FT937LA-B 12 Troubleshooting Guide 12.1. Troubleshooting summary 12.1.1. Troubleshooting After confirming the problem by asking the user, troubleshoot according to the instructions and observe the following precautions. 12.1.2. 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.
KX-FT937LA-B 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. Note: Refer to Error Message (Display) (P.10) for display message.
KX-FT937LA-B • The unit is too hot. Stop using the unit for a while and let the unit cool down.
KX-FT937LA-B CROSS REFERENCE: Test Mode (P.54)
KX-FT937LA-B 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 30 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.
KX-FT937LA-B 22.214.171.124. Journal 2 Refer to JOURNAL 2 in Printout Example (P.78). Journal 2 displays the additional detailed information about the last 30 communications. Descriptions: (1) RCV. MODE Indicates which receive mode the unit was in when the unit received a fax message.
KX-FT937LA-B 126.96.36.199. Journal 3 Refer to JOURNAL 3 in Printout Example (P.78). 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.
KX-FT937LA-B 12.3.3. Communication Section Find the problem in the table shown below, and refer to the corresponding troubleshooting procedure in Defective Facsimile Sec- tion (P.80). Symptom Content Possible cause The paper is not fed properly when faxing. Troubleshooting Problem with the feeding mechanism.
KX-FT937LA-B 188.8.131.52. Defective Facsimile Section 184.108.40.206.1. Transmit Problem Note: Refer to Other (P.9) for display message. CROSS REFERENCE: Operation Panel Section(P.113) ADF (Auto Document Feed) Section(P.93) Maintenance(P.131)
KX-FT937LA-B 220.127.116.11.2. Sometime there is a transmit problem Note: Refer to Error Message (Display) (P.10) for display message. Note: • “596: Transmit level set” represents a service code. (Refer to Service Function Table (P.57).)
KX-FT937LA-B 18.104.22.168.3. 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.57).) Remarks: Regarding the reception problem, we have investigated the conceivable causes in the flow chart except for the software-related errors.
KX-FT937LA-B 22.214.171.124.4. The unit can copy, but cannot transmit/receive CROSS REFERENCE: Analog Board Section (P.108) Test Mode (P.54)
KX-FT937LA-B 126.96.36.199.5. 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.
KX-FT937LA-B (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.
KX-FT937LA-B 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 &...
KX-FT937LA-B 188.8.131.52.7. 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.
KX-FT937LA-B 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).
KX-FT937LA-B 12.4.2. Program Mode Table Code Function Set Value Default Remote Set- ting Set date and time dd/mm/yy hh:mm 01 Jan. 2006 Your logo --------- None Your FAX number --------- None Print sending report 1:ERROR / 2:ON / 3:OFF ERROR...
KX-FT937LA-B Code Function Set Value Default Remote Set- ting TAM continuous tone detection 1:ON/2:OFF FAX auto redial time set 00-99 FAX auto redial line disconnection time set 001-999sec 065sec CNG transmit select 1:OFF / 2:ALL / 3:AUTO Time between CED and 300 bps...
KX-FT937LA-B 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.
KX-FT937LA-B 12.5.3. Troubleshooting Items ITEM SYMPTOM REFERENCE No feed See No Document Feed (P.93) (Auto Document Feeder) Paper jam See Document Jam (P.94) Multiple feed See Multiple Feed (P.95) Skew See Skew (P.96) Printing Skewed receiving image. See Skewed Receiving Image (P.98) Image is distorted.
KX-FT937LA-B 12.5.4. ADF (Auto Document Feed) Section 184.108.40.206. No Document Feed Note: (*1): Refer to Multiple Feed (P.95) (*2): Refer to How to Remove the Operation Board, LCD and Platen Roller (P.122) (*3): Refer to Test Mode (P.54) (*4): Refer to Digital Board Section (P.100) (*5): Refer to Sensor Section (P.114)
KX-FT937LA-B 220.127.116.11. Document Jam CROSS REFERENCE: Test Mode (P.54) Sensor Section (P.114) Note: (*1): Refer to How to Remove the Operation Board, LCD and Platen Roller (P.122) (*2): Refer to Disassembly and Assembly Instructions (P.118)
KX-FT937LA-B 18.104.22.168. Multiple Feed Note: (*1): Refer to How to Remove the Separation Holder and Document Feed Support (P.123) (*2): Refer to Disassembly and Assembly Instructions (P.118) (*3): Refer to Maintenance (P.131)
KX-FT937LA-B 22.214.171.124. Skew Note: (*1): Refer to Maintenance Items and Componet Locations (P.131) (*2): Refer to Disassembly and Assembly Instructions (P.118) (*3): Refer to How to Remove the Separation Holder and Document Feed Support (P.123) (*4): Refer to How to Remove the Operation Board, LCD and Platen Roller (P.122)
KX-FT937LA-B 126.96.36.199. Image is Distorted (When printing) CROSS REFERENCE: Thermal Head Section (P.116). Test Mode(P.54) CIS (Contact Image Sensor) Section (P.115). Note: (*1): Refer to Maintenance Items and Componet Locations (P.131) (*2): Refer to Disassembly and Assembly Instructions (P.118) (*3): Refer to How to Remove the Operation Board, LCD and Platen Roller (P.122)
KX-FT937LA-B 188.8.131.52. Black or White Vertical Lines Appear CROSS REFERENCE: Test Mode(P.54) Digital Board Section (P.100) Note: (*1): Refer to How to Remove the Lock Lever and Thermal Head (P.126) (*2): Refer to Maintenance Items and Componet Locations (P.131) (*3): Refer to How to Remove the Operation Board, LCD and Platen Roller (P.122) (*4): Refer to How to Remove the Image Sensor (CIS) and Feed Roller (P.124)
KX-FT937LA-B 184.108.40.206. When Coping or Printing, an Abnormal Sound is Heard from the Unit Note: (*1): Refer to Document Feeder/Scanner Glass Cleaning (P.140) (*2): Refer to Thermal Head Cleaning (P.140) (*3): Refer to Disassembly and Assembly Instructions (P.118) (*4): Refer to How to Remove the Motor of Gear Block (P.129)
KX-FT937LA-B 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.
KX-FT937LA-B 220.127.116.11. Digital Block Diagram Digital board is including analog system. All analog signals (Telephone, CID and TAM) excepting Fax communications. Another one is ASIC system for mechanical functions: Copy, Fax and UI (LCD/Key). And serial interface (UART) connects both systems.
KX-FT937LA-B NG Wave pattern Note: Refer to NG Example (P.107).
KX-FT937LA-B 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 ROM, the ASIC cannot access DRAM normally.) The digital circuit actually operates according to the timing combinations of these signals.
KX-FT937LA-B 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.
KX-FT937LA-B 18.104.22.168. Defective ITS (Integrated Telephone System) Section 1. No handset and monitor transmission / reception Following the ITS section or NCU section, search for the route between the microphone and the telephone line (sending) or between the telephone line and the speaker (receiving) where the signal disappears.
KX-FT937LA-B 12.5.7. Power Supply Board Section 22.214.171.124. Key components for troubleshooting Check the following parts first: F1, D10-D13, 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-FT937LA-B 126.96.36.199. Broken Parts Repair Details (D10, D11, D12, D13) Check for a short-circuit in terminal 4. If D10, D11, D12 and D13 are short-circuits, F1 will melt (open). In this case, replace all of the parts (D10, D11, D12, D13, F1).
KX-FT937LA-B 12.5.8. Operation Panel Section 188.8.131.52. No Key Operation CROSS REFERENCE: Test Mode(P.54) 184.108.40.206. No LCD Indication CROSS REFERENCE: Test Mode(P.54)
KX-FT937LA-B 12.5.9. Sensor Section Refer to Sensors and Switches (P.26) for the circuit descriptions. 220.127.116.11. Check the Document Sensor (SW39)....“CHECK DOCUMENT” Note: Refer to Error Message (Display) (P.10) for display message. 18.104.22.168. Check the Read Position Sensor (SW38)....“REMOVE DOCUMENT” Note:...
KX-FT937LA-B 12.5.10. CIS (Contact Image Sensor) Section Refer to Scanning Block (P.24). CROSS REFERENCE: Test Mode (P.54)
KX-FT937LA-B 12.5.11. Thermal Head Section Refer to Thermal Head (P.22).
KX-FT937LA-B 14 Disassembly and Assembly Instructions 14.1. Disassembly Flowchart 14.1.1. Upper Cabinet Section CROSS REFERENCE: A-1: How to Remove the Paper Stacker (P.120) A-2: How to Remove the Operation Panel Block (P.121) A-3: How to Remove the Operation Board, LCD and Platen Roller (P.122) A-4: How to Remove the Separation Holder and Document Feed Support (P.123)
KX-FT937LA-B 14.1.2. Lower Cabinet Section CROSS REFERENCE: A-1: How to Remove the Paper Stacker (P.120) A-6: How to Remove the Cutter Unit (P.125) B-1: How to Remove the Bottom Frame (P.127) B-2: How to Remove the Analog Board, Digital Board, Power Supply Board and Power Cord (P.128) B-3: How to Remove the Gear Block and Separation Roller (P.129)
KX-FT937LA-B 15 Maintenance 15.1. Maintenance Items and Componet Locations 15.1.1. Outline MAINTENANCE AND REPAIRS ARE PERFORMED USING THE FOLLOWING STEPS. 1. Periodic maintenance Inspect the equipment periodically and if necessary, clean any contaminated parts. 2. Check for breakdowns Look for problems and consider how they arose.
KX-FT937LA-B 22.214.171.124. 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 thoroughly. Refer to How to Remove the Image Sensor (CIS) and Feed Roller (P.124).
KX-FT937LA-B 15.2. Gear Section This section shows how the motor-driven gear mechanism works in the main operations: FAX transmission, FAX reception the motor and copying. 15.2.1. Mode Selection When the motor attached to the Drive Motor Gear rotates counterclockwise (CCW), Swing Gear A engages the CAM and the CAM turns counterclockwise to select a mode.
KX-FT937LA-B 15.2.2. Mode Operation Once a mode is selected, the Drive Motor Gear rotates clockwise (CW) and then the Swing Gear A-1 controls the mode opera- tion. 126.96.36.199. TX Mode Swing Gear A engages Gear TX and conveys its drive power to the Separation Roller Gear for pre-feeding documents.
KX-FT937LA-B 188.8.131.52. Copy Mode Swing Gear A and B engage Gear TX and Gear RX respectively and drive both the Separation Roller Gear and the Platen Roller Gear for feeding documents and recording paper in the copying operation. Fig. D: Copy mode 184.108.40.206.
KX-FT937LA-B 220.127.116.11. Cutter Mode Swing gear C engages the gear cutter and conveys its drive power to cutter unit for cutting recording paper. Fig. F: Cutter mode 15.2.3. Mechanical Movements in the Main Operations 18.104.22.168. Idle Status...
KX-FT937LA-B 15.3. Jams 15.3.1. Recording Paper Jams 5. Install the recording paper and close the top cover securely by pushing down on both sides. 1. Open the top cover by pressing the top cover release but- (See page Installing the Recording Paper (P.51)) ton ( 15.3.2.
KX-FT937LA-B 15.4. Cleaning 15.4.1. Document Feeder/Scanner Glass 15.4.2. Thermal Head Cleaning Cleaning If smudges or black/white lines appear on a copied/received document, check whether there is dust on the thermal head. Clean the document feeder when: Clean it to remove the dust.
KX-FT937LA-B 16.2. 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.
KX-FT937LA-B 16.2.3. 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.
KX-FT937LA-B 16.2.5. 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.
KX-FT937LA-B Refer to Analog Board Section (P.108).
KX-FT937LA-B FAX TX signal FAX RX signal 100 2W TO TEL LINE RLY1 POS1 220 1/4W (PU AT DIGITAL BOARD) K0.01u TO EXT. TEL 250V1u 15K 1/2W (10) 5.6K K0.068u 1K2A +24V (11) RLY1 K0.1u (12) J220p 620K K0.027u (13) K0.027u...
KX-FT937LA-B 19 Appendix Information of 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-FT937LA-B 20.2. Replacement Parts List Ref. Part No. Part Name & Description Remarks Notes: PFKR1086Z1 GUIDE, LEFT 1. The marking (RTL) indicates that the Retention Time is PFUV1088Z2 COVER, DOCUMENT GUIDE PFHX1834Z READ SHEET (WHITE PLATE) limited for this item.
KX-FT937LA-B Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks K0H1BA000259 SPECIAL SWITCH ECJ1VB1H103K 0.01 K0H1BA000259 SPECIAL SWITCH ECJ1VB1H103K 0.01 K0H1BA000259 SPECIAL SWITCH ECJ1VC1H181J 180P K0H1BA000259 SPECIAL SWITCH ECEA0JKS101 K0H1BA000259 SPECIAL SWITCH 20.7. Power Supply Board Parts...