Panasonic KX-FT21RS Скачать руководство пользователя страница 142

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8.2. PRINTED CIRCUIT BOARD (DIGITAL BOARD): BOTTOM VIEW

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PFUP1183ZA

KX-FT21RS

142

Содержание KX-FT21RS

Страница 2: ...lephone System and MONITOR SECTION 132 6 10 EXT TEL 133 6 11 OPERATION PANEL 135 6 12 POWER SUPPLY BOARD SECTION 137 7 FOR THE SCHEMATIC DIAGRAMS 140 8 PRINTED CIRCUIT BOARD 141 8 1 PRINTED CIRCUIT BOARD DIGITAL BOARD COMPONENT VIEW 141 8 2 PRINTED CIRCUIT BOARD DIGITAL BOARD BOTTOM VIEW 142 8 3 PRINTED CIRCUIT BOARD ANALOG BOARD COMPONENT VIEW 143 8 4 PRINTED CIRCUIT BOARD ANALOG BOARD BOTTOM VIE...

Страница 3: ...umpered AC plug and each exposed metal cabinet part screw heads control shafts bottom frame etc Note Some exposed parts may be isolated from the chassis by design These will read infinity 4 If the measurement is outside the specified limits there is a possibility of a shock hazard The equipment should be repaired and rechecked before it is returned to the customer 1 3 FOR SERVICE TECHNICIANS ICs a...

Страница 4: ...1 5 AC CAUTION For safety before closing the lower cabinet please make sure of the following precautions 4 KX FT21RS ...

Страница 5: ... There is a separation roller and a document feed roller which are rotated by the document feed motor A gear rotates the two rollers Be careful not to touch them with your hands especially when the unit is operating 1 6 2 LIVE ELECTRICAL SECTIONS All the electrical sections of the unit supplied with AC power by the AC power cord are live Never disassemble the unit for service with the AC power sup...

Страница 6: ...ct Design Resolution standard fine super fine halftone Copier Function Automatic Document Feeder 10 Sheets Help Printout Easy to view LCD 15 Characters Integrated telephone system Electric Volume Control On hook dialing Redialing function Temporary tone dialing Electric telephone directory 1 7 FEATURES 6 KX FT21RS ...

Страница 7: ...m Speed 9 600 7 200 4 800 2 400 bps Automatic Fallback Operating Environment 5 C 35 C 41 F 95 F 45 85 RH Relative Humidity Dimensions H W D 122 mm 338 mm 240 mm 4 13 16 13 5 16 9 7 16 Mass Weight Approx 2 5 kg 5 5 lb Power Consumption Standby Approx 5 5 W Transmission Approx 17 W Reception Approx 30 W When receiving the CCITT No 1 Test Chart Copy Approx 30 W When copying the CCITT No 1 Test Chart ...

Страница 8: ...1 10 CCITT No 1 TEST CHART 8 KX FT21RS ...

Страница 9: ...1 11 LOCATION OF CONTROLS 1 11 1 OVERVIEW 1 11 2 CONTROL PANEL 9 KX FT21RS ...

Страница 10: ...1 12 CONNECTIONS NOTE When you operate this products the power outlet should be near the product and easily accessible 10 KX FT21RS ...

Страница 11: ...e paper approximately 10 cm 4 inches out of the unit Make sure that there is no slack in the paper roll Cover open button 10 cm 1 2 3 4 Note Only use the included roll of paper or specified recording paper or else the print quality may be affected and or excessive thermal head wear may occur For accessory order information When the power cord is connected every time you close the cover a message w...

Страница 12: ...ntinuously move the cursor to the next space Press START COPY SET SETUP ITEM Press MENU To insert a character 1 Press or to move the cursor to the position to the right of where you want to insert the character 2 Press One Touch Dial key 2 to insert a space and enter the character To correct a mistake Press or to move the cursor to the incorrect character then make the correction To delete a chara...

Страница 13: ... ink paste or correction fluid has dried Do not send the following types of documents Use copies for fax transmission Chemically treated paper such as carbon or carbonless duplicating paper Electrostatically charged paper Heavily curled creased or torn paper Paper with a coated surface Paper with a faint image Paper with printing on the opposite side that can be seen through the front e g newspape...

Страница 14: ...sting to determine if the problem originates from the transmitter receiver or the telephone line 4 Determine causes Determine the causes of equipment problem by troubleshooting 5 Equipment repairs Repair or replace the defective parts and take appropriate measures at this stage to ensure that the problem will not recur 6 Confirm normal operation of the equipment After completing the repairs conduc...

Страница 15: ...1 14 2 1 MAINTENANCE LIST 1 14 2 2 MAINTENANCE CYCLE 15 KX FT21RS ...

Страница 16: ...t feeder rollers sub roller and rubber flap with a cloth moistened with isopropyl rubbing alcohol and let all parts dry thoroughly Clean the white plate and glass with a soft dry cloth Close the cover securely by pushing down on both ends Connect the power cord and the telephone line cord Caution Do not use paper products such as paper towels or tissues to clean the inside of the unit Power cord T...

Страница 17: ...ressing the cover open button Clean the thermal head with a cloth moistened with isopropyl rubbing alcohol and let it dry thoroughly Close the cover securely by pushing down on both ends Connect the power cord and the telephone line cord Caution To prevent a malfunction due to static electricity do not use a dry cloth and do not touch the thermal head directly with your fingers 1 2 3 4 5 1 14 3 3 ...

Страница 18: ...d the paper is set correctly without any slack 2 Before troubleshooting first check that the connectors and cables are connected correctly not loose If the problem occurs randomly check it very carefully 3 When connecting the AC power cord with the unit case and checking the operation exercise utmost care when handling electric parts in order to avoid electric shocks and short circuits 4 After tro...

Страница 19: ...2 2 USER RECOVERABLE ERRORS If the unit detects a problem the following messages will appear on the display Note The explanations given in the are for servicemen only 19 KX FT21RS ...

Страница 20: ...ve the jammed document as follows Open the cover by pressing the cover open button Remove the jammed document carefully Close the cover securely by pushing down on both ends Note Do not pull out the jammed paper forcibly before opening the cover Cover open button 1 2 3 20 KX FT21RS ...

Страница 21: ...bleshooting method Even difficult faults can be tracked to a specific block or area for example the Digital Board or Image Sensor A variety of fault descriptions from customers often point to the same area and for this reason careful analysis of the reported symptoms is required After every repair test all functions to ensure no problems are evident 2 3 2 STARTING TROUBLESHOOTING Select the approp...

Страница 22: ...2 3 3 Simple Check List 22 KX FT21RS ...

Страница 23: ...2 3 4 TROUBLESHOOTING ITEMS TABLE 23 KX FT21RS ...

Страница 24: ...2 3 4 1 ADF Auto Document Feed Section 1 No document feed 24 KX FT21RS ...

Страница 25: ...2 Paper JAM 25 KX FT21RS ...

Страница 26: ...3 Multiple feed When using thick paper etc If the document will not feed Refer to 3 1 ADJUSTING THE FEED PRESSURE 26 KX FT21RS ...

Страница 27: ...4 Skew 27 KX FT21RS ...

Страница 28: ...5 Image is distorted When printing 28 KX FT21RS ...

Страница 29: ...6 Black or white vertical lines appear 7 Skewed receiving image 29 KX FT21RS ...

Страница 30: ...8 Expander print When printing 9 When copying or printing an abnormal sound is heard from the unit 30 KX FT21RS ...

Страница 31: ...31 KX FT21RS ...

Страница 32: ...2 3 4 2 Communication Section Find the problem in the table shown below and refer to the corresponding troubleshooting procedure in 2 3 4 2 1 Defective facsimile section 32 KX FT21RS ...

Страница 33: ...2 3 4 2 1 Defective facsimile section 1 Transmit problem 33 KX FT21RS ...

Страница 34: ...2 Sometimes there is a transmit problem 34 KX FT21RS ...

Страница 35: ...eiving problem when sometimes the below errors may be occurred OUT OF PAPER CHECK COVER Unit OVERHEATED If it doesn t return automatically COVER OPEN etc reset the unit CHECK DOCUMENT PAPER JAM Please refer to 2 2 User Recoverable Errors for the above items Also when a hardware deformity occurs please check each sensor 35 KX FT21RS ...

Страница 36: ...4 The unit can copy but cannot transmit receive 36 KX FT21RS ...

Страница 37: ...utton has been pressed for models with a START button the other party should be called manually if possible Another possibility is entering two pauses at the end of the auto dial number on the transmission side Then the count start time will be delayed for 2 pauses about 10 sec Cause 2 Erroneous detection due to an echo or echo canceler Echo Echo Canceler The signal from FAX1 reaches FAX2 via the ...

Страница 38: ... S2 will become ON Then the echo of the DIS signal output afterwards may be received and FAX1 may execute an erroneous operation preventing communication from starting Countermeasure B In the service mode the time setting between the CED signal and the DIS signal is set from 75 msec to 500 msec in the service mode code No 593 This is because the echo canceller operation stop mode is cancelled by a...

Страница 39: ...and reception capability of the other FAX unit and the line conditions The countermeasures for this unit are shown below Transmission Operation Set the transmitting speed to 4800BPS service mode code No 717 or select the overseas mode Reception Operation If 80 or more of the reception is incorrect set the receiving speed to 4800BPS Service mode code No 718 39 KX FT21RS ...

Страница 40: ...7 How to output the Journal Report 40 KX FT21RS ...

Страница 41: ...an be resolved by the following steps a Change the transmit level Service code 596 refer to 2 4 4 Service Function Table b Change the TX speed RX speed Service code 717 718 refer to 2 4 4 Service Function Table If the problem remains see the next page 41 KX FT21RS ...

Страница 42: ...Countermeasure 42 KX FT21RS ...

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Страница 50: ...e 999 from the customer s fax machine Based on this the parameters for the desired codes can be changed The procedure for changing and listing parameters is described on 1 Entering the remote programming mode and Changing service codes Also before exiting the remote programming mode it is advisable to obtain a new list to confirm that only the desired parameters were changed Hint Since the connect...

Страница 51: ...1 Entering the remote programming mode and changing service codes 51 KX FT21RS ...

Страница 52: ...1 ROM check Press START NG 553 Monitor on FAX communication select 1 OFF 2 P B 3 ALL OFF OK 554 Modem test Press START NG 555 Scanner test Press START NG 556 Motor test Press START NG 557 LED test Press START NG 558 LCD test Press START NG 559 Document jam detection select 1 ON 2 OFF ON OK 561 Key test Press any key NG 563 CCD position adjustment value set 00 30 mm OK 570 Break select 1 61 2 67 61...

Страница 53: ...ce list 1 START OK OK Can set the value by the remote programming feature or print a list NG Cannot set the value Note Note Refer to 2 4 4 SERVICE FUNCTION TABLE for descriptions of the individual codes For example the 004 Transmission report mode set value 1 ERROR 2 ON 3 OFF number corresponds to the number dialled 53 KX FT21RS ...

Страница 54: ...lyzed In past experiences digital IC especially SRAM and ROM malfunctions are extremely rare after installation in the product This may be repaired by replacing the IC ASIC etc However the real cause may not have been an IC malfunction but a soldering fault instead Soldering faults which are difficult to detect with the naked eye are common particularly for an ASIC and RA Resistor Array But if you...

Страница 55: ...XD KIN0 KIN1 KIN2 KIN3 RS E VOL HEAD CTL XWDERR RD WR XRESETI A0 17 D0 7 CIS CTL LED ON ASIC IC1 32 768KHz 20 736MHz 24MHz T0 T2 T5 IC7 MOTOR DRIVER TO MOTOR TO OPE PANEL RX SP H S RX H S TX TX RXIN TXOUT ANALOG FRONT END IC5 ANALOG SW IC6 TO ANALOG TO ANALOG SRAM IC3 A0 17 D0 7 RD WR IC7 5V 24V Q13 24V TH ON I O ANALOG PORT CONTROL TO SRAM IC3 55 KX FT21RS ...

Страница 56: ... signal lines that must be normal for the system to boot up are listed here List 1 For signal lines other than these even if they malfunction they do not directly affect booting up the system 56 KX FT21RS ...

Страница 57: ...Normal Wave Patterns 57 KX FT21RS ...

Страница 58: ...ations of these signals So if the timing of these signals is even slightly off the circuit will not operate normally Even of the IC did malfunction the output voltage level may become abnormal but the timing is accurate according to the specifications If oscillation is provided accurately Accordingly the problem presented here is whether each IC outputs the correct signal See the I O and Pin No di...

Страница 59: ...After the power is turned on the ASIC CPU initializes and checks each IC The ROM SRAM and Modem are checked If initialization fails for the ICs the system will not boot up 59 KX FT21RS ...

Страница 60: ...60 KX FT21RS ...

Страница 61: ...NG Example 61 KX FT21RS ...

Страница 62: ...2 3 4 3 2 Check the Status of the Digital Board Put the unit in the test mode and check the voltage at lands A B C and D 62 KX FT21RS ...

Страница 63: ...ins from the handset microphone and is output in the telephone line In this route it is mainly an analog signal Tracing the signal can be done easily using an oscilloscope Each route is shown on the Check Sheet here If there is a problem with the unit for example you cannot communicate with the H S etc trace the signal in the area and determine the cause Note Inside the digital board 63 KX FT21RS ...

Страница 64: ...1 Defective ITS Integrated Telephone System Section 64 KX FT21RS ...

Страница 65: ...st with standing voltage test intentional short circuit test etc Caution If you find a melted fuse in the unit do not turn on the power until you locate and repair the faulty parts except for the fuse otherwise the fuse will melt again and you cannot pinpoint the faulty point In most cases the symptom is that nothing is output It is more likely that the fault is in the primary side rather than the...

Страница 66: ...2 Troubleshooting Flow Chart 66 KX FT21RS ...

Страница 67: ...67 KX FT21RS ...

Страница 68: ...t case of Q101 is a short circuit between the Drain and Gate because damage expands to the peripheral circuit of Q101 This is due to a very high voltage through the Gate circuit which is composed of R107 R109 D106 and IC101 You should change all of the parts listed as follows F101 Q101 R107 R109 D106 IC101 D201 If D201 is broken the oscillation circuit in the power supply cannot operate Check it w...

Страница 69: ...2 3 4 6 Operation Board Section 1 No key operation 2 No LCD indication 69 KX FT21RS ...

Страница 70: ...2 3 4 7 Sensor Section Refer to 6 5 SENSORS AND SWITCHES for the circuit descriptions 1 Check the document sensor PS1 REMOVE DOCUMENT 2 Check the read position PS2 CHECK DOCUMENT 70 KX FT21RS ...

Страница 71: ...2 3 4 8 Read Section Refer to 6 4 4 SCANNING BLOCK 71 KX FT21RS ...

Страница 72: ...72 KX FT21RS ...

Страница 73: ...2 3 4 9 Thermal Head Section Refer to 6 4 3 THERMAL HEAD 73 KX FT21RS ...

Страница 74: ...grams The normal programs are those listed in the Operating Instructions and are available to the user The special programs are only those listed here and not displayed to the user In both the User and Service Modes there are Set Functions and Test Functions The Set Functions are used to program various features and functions and the Test Functions are used to test the various functions The Set Fu...

Страница 75: ...2 4 3 USER MODE The list below is an example of the SYSTEM SETUP LIST the unit prints out Note The above values are the default values 75 KX FT21RS ...

Страница 76: ...lign the image 570 Setting the break 1 61 2 67 1 2 61 Sets the break of pulse dialing 571 Setting the number of times that ITS is redialed 00 99 00 99 14 times Selects the number of times that ITS is redialed not including the first dial 572 Setting the ITS redial interval 001 999 sec 001 999 030 sec Sets the interval of ITS redialing 573 Setting of number of time that REMOTE TURN ON BELL sound 01...

Страница 77: ... mode after redialing 763 CNG detect time 1 10 sec 2 20 sec 3 30 sec 1 2 3 20 sec Selects the CNG detection time of friendly reception 771 T1 timer 1 35 sec 2 60 sec 1 2 35 sec Sets a higher value when the response from the other party needs more time during FAX transmission 774 T4 timer 00 99 100ms 00 99 00 815 Sensor check Press START 882 Journal 3 list See 2 6 1 PRINTOUT EXAMPLE 844 Original se...

Страница 78: ...2 4 6 OTHER 78 KX FT21RS ...

Страница 79: ...2 5 TEST FUNCTIONS 79 KX FT21RS ...

Страница 80: ...e After performing this check do not forget to turn the setting off Otherwise dialing using DTMF will not be possible 2 5 2 BUTTON CODE TABLE Note These codes 00 01 are only for the data in the History Report 2 5 3 PRINT TEST PATTERN 80 KX FT21RS ...

Страница 81: ...N ON Means the unit started to receive after 15 rings Remote Turn On Service Code 573 7 TIME OUT Means the unit started to receive after Ring Time Out in the EXT TAM or TEL FAX mode 8 IDENT Means the unit detected Ring Detection 9 TEL FAX Means the unit detected the CNN while it was sending the Dummy Ring Back Tone in the TEL FAX mode 5 ERROR MEMORY Indicates the reason why the unit received a fax...

Страница 82: ...2 6 1 PRINTOUT EXAMPLE 82 KX FT21RS ...

Страница 83: ...he position of the lever using an instrument with a pointed end such as paper clip Right When documents do not feed Center Standard position pre selected Left When documents multiple feed 3 Close the front lid by gently pressing down on both ends Note Touch the lever using an instrument with a pointed end such as ball point pen because the lever is located in a small place 83 KX FT21RS ...

Страница 84: ...4 DISASSEMBLY INSTRUCTIONS 84 KX FT21RS ...

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Страница 95: ... should be replaced daily 5 2 FLAT PACKAGE IC REMOVAL PROCEDURE 1 When all of the IC lead cannot been seen at the standard degree fill with large quantities of solder Note If you do not fill with solder and directly cut the IC lead with the cutter stress may build up directly in the P C board s pattern If you do not fill with large quantities of solder as in step 1 the P C board pattern may be rem...

Страница 96: ...5 3 FLAT PACKAGE IC INSTALLATION PROCEDURE 5 4 BRIDGE MODIFICATION PROCEDURE 96 KX FT21RS ...

Страница 97: ...BOAD THERMAL HEAD DIGITAL BOARD ANALOG BOARD OPERATION PANEL SPEAKER HANDSET LCD TO TEL LINE TO EX TEL 1 2 3 4 5 6 1 2 3 4 5 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 1 2 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 11 1 2 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 1 2 3 4 5 6 7 8 9 10 11 1 2 3 4 5 6 7 8 9 10 11 12 13 14 1 2 3 4 5 6 7 8 9 10 11 10 9 8 7 6 5 4 3 2 1 6 5 4 3 2 1 CN1 CN102 CN...

Страница 98: ...y is used mainly for the parameter working storage area 4 MODEM Incruded in IC1 Modem for the FAX 5 Read Section Contact Image Sensor CIS to read transmitting documents 6 Thermal Head Contains heating elements for dot matrix image printing 7 Motor driver IC7 Drives the motor and CIS LED 8 Reset circuit IC4 Provides a reset pulse to each of the major ICs 9 Analog board Composed of an ITS circuit an...

Страница 99: ...ANDSET SPEAKER 24V 5V RLY ANA LOG SW LCD SENSOR KEY MATRIX CPU OP PANEL I F IMAGE PROCESSING MOTOR I F MOTOR SENSOR ROM 1M SRAM 256k OSC I O A D RESET REG RTC CIS THERMAL HEAD 24V 24V AC220V 5V 5V 5V MODEM REG MOS SW 3 3V PRINTER CONTROL I F ROM SELE CTOR VOL SP AMP SP MUTE HOOK SW PAPER PC CODEC ANA LOG SW 99 KX FT21RS ...

Страница 100: ...D KRXD KIN0 KIN1 KIN2 KIN3 RS E VOL HEAD CTL XWDERR RD WR XRESETI A0 17 D0 7 CIS CTL LED ON ASIC IC1 32 768KHz 20 736MHz 24MHz T0 T2 T5 IC7 MOTOR DRIVER TO MOTOR TO OPE PANEL RX SP H S RX H S TX TX RXIN TXOUT ANALOG FRONT END IC5 ANALOG SW IC6 TO ANALOG TO ANALOG SRAM IC3 A0 17 D0 7 RD WR IC7 5V 24V Q13 24V TH ON I O ANALOG PORT CONTROL TO SRAM IC3 100 KX FT21RS ...

Страница 101: ... Power supply 5V Tolerant Signal Name I O Description 1 X32OUT VDDRTC X32OUT 32 768kHz oscillator for RTC built in feed back resistor 2 X32IN VDDRTC NO X32IN 32 768kHz oscillator for RTC built in feed back resistor 3 VDDRTC 3 3V BATT 32 768kHz backup power supply for RTC 4 XBACKEN VDDRTC YES XRESET Backup enable 5 VDDSRAM 3 3V BATT RAMCS buffer backup power supply for reset 6 XRAMCS VDDSRAM VDDSRA...

Страница 102: ...3V YES PAPER Recording paper detection 58 TONE1 3 3V TONE1 Not used 59 TONE2 3 3V TONE2 Tone2 bell alarm key tone 60 VSS DG Ground 61 3 3V 3 3V Power supply 62 EVOLIN 3 3V EVOL IN Electronic volume handset monitor 63 EVOLOUT 3 3V EVOL OUT Electronic volume handset monitor 64 EVOLREF 3 3V EVOL REF Electronic volume handset monitor 65 VSS DG Ground 66 IOP57 3 3V YES EX HOOK O Not used 67 XMDMINT 3 3...

Страница 103: ... ADR6 3 3V 6 Address bus 124 ADR7 3 3V 7 Address bus 125 ADR8 3 3V 8 Address bus 126 ADR9 3 3V 9 Address bus 127 ADR10 3 3V 10 Address bus 128 VSS DG Ground 129 3 3V 3 3V Power supply 130 ADR11 3 3V 11 Address bus 131 ADR12 3 3V 12 Address bus 132 RBA0 3 3V A13 Bank address 133 RBA1 3 3V 14 Bank address 134 RBA2 3 3V 15 Bank address 135 RBA3 3 3V 16 Bank address 136 RBA4 3 3V 17 Bank address 137 R...

Страница 104: ...N3 3 3V YES KIN3 I O Key read read start position sensor control 183 KEYIN4 3 3V YES OPEN O Not used 184 KEYIN5 3 3V YES OPEN O Not used 185 OPLED 3 3V YES OPESEL OD Operation panel control 186 VSS DG GND 187 3 3V 3 3V OD Power supply 188 KSTART 3 3V YES KSTART OD LCD control 189 KLATCH 3 3V YES KLATCH OD Key scan LCD control 190 KSCLK 3 3V YES KSCLK OD Key scan LCD control 191 KTXD 3 3V YES KTXD ...

Страница 105: ...in 1 of the Reset IC IC4 resets the gate array IC1 1 During a power surge a positive reset pulse of 175 msec or more is generated and the system is reset completely This is done to prevent partial resetting and system runaway during a power fluctuation 2 When pin 1 of IC4 becomes low it will prohibit the RAM IC3 from changing data The RAM IC3 will go into the backup mode when it is backed up by a ...

Страница 106: ... power is turned ON power is supplied RAM IC3 and RTC IC1 At this time the voltage at pin 28 of RAM is 5V and pin 3 of RTC IC1 is 3 3V When the power is turned OFF the battery supplies the power to RAM and RTC through J1 R14 D1 or D7 At that time the voltage at pin 28 of RAM and pin 3 of IC1 are about 2 5V When the power is OFF and the 5V and 3 3V voltages decrease IC4 detects them and LOW is inpu...

Страница 107: ...int A In point C according to the voltage output time the thermal head s temperature is detected After the thermal head temperature is converted to voltage in B it is then changed to digital data in the A D converter inside IC1 The CPU decides the strobe width of the thermal head according to this value Therefore this circuit can keep the thermal head at an even temperature in order to stabilize t...

Страница 108: ...IS The LED ARRAY will light during transmission and copying as a light source to recognize document characters patterns or graphics on a document It is also possible to light the LED ARRAY in the test mode 108 KX FT21RS ...

Страница 109: ...e is input to the P S converter via routes 6 and 8 The white black data converted to serial data in the P S converter is input to the Thermal Head via route 9 and is printed out on recording paper Note Standard Reads 3 58 times mm Fine Reads 7 7 times mm Super Fine Reads 15 4 times mm Transmission 1 Same processing as COPY items 1 3 2 The data stored in RAM of IC1 is output from IC1 via routes 6 a...

Страница 110: ...2 ROM 11 12 SYSTEM BUS Analog Front End NCU TEL LINE P S CONVERTER THERMAL HEAD 15 14 CPU RAM MODEM IMAGE PROCESSING SECTION A D ANALOG SIGNAL CONTACT IMAGE SENSOR PROCESSING SECTION IC1 2 3 1 9 7 8 4 5 6 10 13 IC5 AFE 110 KX FT21RS ...

Страница 111: ...of dot increment 1728 all the shift registers become filled with data and a latch pulse is emitted to each IC from IC1 pin 167 THLAT With this latch pulse all the contents of the shift registers are latched to the latch registers Thereafter through the addition of strobes from the IC1 pins 159 160 only black dot locations 1 among latched data activates the driver and the current passes to heat the...

Страница 112: ...112 KX FT21RS ...

Страница 113: ...ide IC7 turns on This applies voltage to the LED array to light it The contact image sensor is driven by each of the FTG F1 signals output from IC1 and the original image illuminated by the LED array undergoes photoelectric conversion to output an analog image signal AIN The analog image signal is input to the system LSI IC1 on ANA1 pin 205 of IC1 and converted into 8 bit data by the A D converter...

Страница 114: ... go ON The motor coil is energized sequentially in 2 phase increments or 1 2 phase increments which causes a 1 step rotation A 1 step rotation is 0 13mm of recording paper or document paper The timing chart is below Stepping Motor Phase Pattern Function Mode Phase Pattern Speed Copy Fine Half Tone 1 2 217 pps Super Fine 1 2 108 5 pps FAX STD 2 217 pps Fine Half Tone 1 2 217 pps Super Fine 1 2 108 ...

Страница 115: ...lection When the motor attached to the Drive Motor Gear rotates counterclockwise CCW Swing Gear A 2 engages the CAM and the CAM turns counterclockwise to select a mode See Fig A There are three mode options controlled by the Switch A Transmitmode B Receive mode and C Copy mode In Fig B you can see which mode is selected by the position of the rib in the CAM 115 KX FT21RS ...

Страница 116: ...ar for pre feeding documents B Receive mode Swing Gear B engages G8 and conveys its drive power to the Platen Roller Gear for printing the received data C Copy mode Swing Gear A 1 and B engage Gears 6 and 8 respectively and drive both the Separation Roller Gear and the Platen Roller Gear for feeding documents and recording paper in the copying operation 6 4 6 3 Mechanical Movements in the Main Ope...

Страница 117: ...6 4 6 3 2 Scanning 6 4 6 3 3 Printing Note See 6 5 SENSERS AND SWITCHES 117 KX FT21RS ...

Страница 118: ...6 4 6 3 4 Copying 118 KX FT21RS ...

Страница 119: ... Sensor Circuit Location Sensor Sensor or Switch Name Message Error Digital SW3 Motor Position Analog SW1 Cover Open and Paper set CHECK COVER and OUT OF PAPER SW2 Hook SW Operation Panel PS2 Document Read Position REMOVE DOCUMENT PS1 Document CHECK DOCUMENT 119 KX FT21RS ...

Страница 120: ...g Paper Sensor SW201 When there is no recording paper the plate is separated from the switch lever and the switch turns off Pin 9 of CN102 Analog board becomes a high level When there is recording paper the plate pushes the switch lever and the switch turns ON Pin 9 of CN102 Analog board becomes a low level Analog Board Signal CN102 9 Pin Paper Low level No paper High level 120 KX FT21RS ...

Страница 121: ...el Operation Board Photo transistor Signal CN2 3 Pin Out of the Read Position OFF High level At the Read Position ON Low level 6 5 4 Document Sensor PS1 When a document is set the shelter plate closes the sensor light the photo transistor becomes OFF and the input signal of the CN2 3 pin Operation becomes a high level When there is no document the shelter plate passes the sensor light the photo tr...

Страница 122: ...ion for about 6 minutes at scanning line density of 3 85 lines mm Group II G2 Using reduction technology in the modulation demodulation format an A 4 size document is sent at an official scanning line density of 3 85 lines mm for about 3 minutes Methods to suppress redundancy are not used Determined in 1976 Group III G3 A method of suppressing redundancy in the image signal prior to modulation is ...

Страница 123: ...sent and to check for telephone reservations and or the existence of continuous transmission 5 Facsimile Standards Item Telephone Network Facsimile G3 Machine Connection Control Mode Telephone Network Signal Mode Terminal Control Mode T 30 Binary Facsimile Signal Format Digital Modulation Mode PSK V 27 ter or QAM V 29 Transmission Speed 300 bps Control Signal 2400 4800 7200 9600 bps FAX Signal Red...

Страница 124: ... T 3 operation 5 Receiver T 3 operation Receiver T 3 operation 6 Reserved for future T 3 operation features 7 Reserved for future T 3 operation features 8 Reserved for future T 3 operation features 9 Transmitter T 4 operation 10 Receiver T 4 operation Receiver T 4 operation 11 12 0 0 0 1 1 0 1 1 Data signaling rate V 27 ter fall back mode V 27 ter V 29 V 27 ter and V 29 Data signaling rate 2400 bi...

Страница 125: ...T7 7 1 2 T3 85 40 ms at 3 85 l mm T7 7 1 2 T3 85 0 ms at 3 85 l mm T7 7 T3 85 Minimum scan line time 20 ms 40 ms 10 ms 5 ms 0 ms 24 Extend field 1 Extend field 25 2400 bit s handshaking 0 2400 bit s handshaking 26 Uncompressed mode 0 Uncompressed mode 27 Error correction mode 0 Error correction mode 28 Set to 0 0 Frame size 0 256 octets 1 64 octets 29 Error limiting mode 0 Error limiting mode 30 R...

Страница 126: ...e sender then reduces the transmission speed by one stage and initiates training once again Training 2 Used for reconfirming the receiving side like training 1 Image Signal Refer to the next page RTC Return to Control Sends 12 bits 0 01 6 times to the receiver at the same speed as the image signal and notifies completion of transmission of the first sheet EOP End of Procedure X1110100 End of one c...

Страница 127: ...b Redundancy Compression Process Coding Mode This unit uses one dimensional MH format 127 KX FT21RS ...

Страница 128: ...5 of the analog front end IC5 The signals that enter pin 15 of the analog front end IC5 convert the analog signals to the digital signals then the data is sent to the modem IC1 TEL LINE D1 Q4 E Q4 C C8 T101 R104 C107 R112 IC101 6 IC101 7 C127 IC103 11 IC103 10 CN102 10 CN9 10 IC6 10 IC6 11 R33 C43 IC5 15 IC5 IC1 Digital section 3 DTMF Transmission The DTMF signal generated in the ASIC IC1 is sent ...

Страница 129: ...1 PAPER HOOK IN H STX H SRX SPOUT SPEAKER SP AMP SP MUTE H SRX ENB TEL RX ENB LINERX CN102 IC103 CN9 A A To 1 LINETX MTX ENB H STX MUTE MOM RX ENB IC6 10 11 RELAY a b b a D1 C12 C13 C14 C116 C117 C126 IC103 R117 R116 1 2 4 3 T102 L201 C207 C206 R205 C212 C214 C220 R212 R217 R204 L204 L202 L203 R207 R208 R206 R209 C234 C209 Q201 C205 C112 C113 C111 R109 R110 R112 R108 R106 R107 R113 C109 7 6 5 C106...

Страница 130: ...on Normally this relay switches to the external telephone side Break and switches to the open side make when the unit starts facsimile communication IC1 99 High Level CN9 8 CN102 8 Q2 ON RLY1 make 6 8 3 BELL DETECTION CIRCUIT 1 Circuit Operation The signal waveform for each section is indicated below The signal low level section input to pin 56 of ASIC IC1 on the digital board is read TEL LINE PC5...

Страница 131: ...rom pin 7 The transmission signal is input from CN202 pin 1 and output to the TEL line through C106 R103 R102 and T101 Without a side tone circuit the transmission signal would return to the reception amplifier via C106 Here the signal output from CN202 pin 1 passes through R105 R106 R107 C111 and R110 and enters the amplifier IC101 pin 5 This is used to cancel the return portion of the transmissi...

Страница 132: ...NDSET CIRCUIT 1 Transmission signal 2 Reception Signal TEL LINE D1 Q4 E Q4 C C8 T101 R104 C107 R112 IC101 6 IC101 7 C127 IC103 11 IC103 10 CN102 10 CN9 10 IC6 3 IC6 4 C52 R42 IC8 2 IC8 1 C27 R13 IC1 62 IC1 63 C62 IC8 5 IC8 7 R60 C63 IC6 8 IC6 9 C65 CN10 10 CN202 10 J402 C234 R209 Q201 B Q201 E C205 L202 HANDSET SPEAKER 6 9 4 MONITOR CIRCUIT 1 DTMF Monitor Monitor Handset IC1 IC5 IC5 3 C48 R37 R38 ...

Страница 133: ...the priority EXT TEL is disconnected when the unit is OFF HOOK 1 EXT TEL DC LOOP Signal Path b POS1 LF1 RLY1 3 RLY1 2 L5 EXT TEL L6 RLY1 7 RLY1 6 LF1 F1 a 2 REMOTE RECEIVING This is the parallel connection DTMF signal for the TEL or EXT TEL mode between T and R When the other party is a FAX the unit changes to FAX receiving 133 KX FT21RS ...

Страница 134: ...HOOK IN H STX H SRX SPOUT SPEAKER SP AMP SP MUTE H SRX ENB TEL RX ENB LINERX CN102 IC103 CN9 A A To 1 LINETX MTX ENB H STX MUTE MOM RX ENB IC6 10 11 R33 C43 RELAY a b b a D1 C12 C13 C14 C116 C117 C126 IC103 R117 R116 1 2 4 3 T102 L201 C207 C206 R205 C212 C214 C220 R212 R217 R204 L204 L202 L203 R207 R208 R206 R209 C234 C209 Q201 C205 C112 C113 C111 R109 R110 R112 R108 R106 R107 R113 C109 7 6 5 C106...

Страница 135: ...ion sensor control reading and LCD control are all controlled by I O of ASIC IC1 on the digital board Fig a 6 11 1 KEY SCAN When CN1 8 OPSEL is H the analog switch IC1 is available The KLATCH KSCLK and KTXD control the analog switch IC1 to read at KIN0 3 Analog Switch IC1 Control 0 1 2 3 4 5 6 7 KLATCH A L H L H L H L H KSCLK B L L H H L L H H ktxd C L L L L H H H H Key Matrix 135 KX FT21RS ...

Страница 136: ...R DETECTION When CN1 8 OPSEL is L the detection of the document sensor and read start position sensor are available 6 11 3 LCD CONTROL KTXD KSCLK KLATCH and KSTART are sent as D4 D7 to control the LCD 136 KX FT21RS ...

Страница 137: ... The filter circuit decreases the noise voltage and the noise electric field strength Rectifier Circuit The input current is rectified by D101 D102 D103 and D104 and charges C106 to make DC voltage Then it supplies power to the converter circuit Kick on voltage circuit Bias is applied to the Q101 gate via this circuit when the AC power is turned on and Q101 begins operating 137 KX FT21RS ...

Страница 138: ...llows L D1 Load L Then the power is supplied to the Load When Q1 is ON power is not output from the secondary side The output voltage is fed back in the control IC according to the error amp rectifier Then depending on how TON is controlled stabilization occurs Also when the current load becomes too large in order to decrease the voltage output the increase in is controlled and the output voltage ...

Страница 139: ...ltage of the 24V circuit increases the current of the photo coupler PC101 increases the pulse width of the output control IC becomes narrower and the ON period of Q101 becomes shorter Over Current Limiter O C L The highest drain current Q101 is limited by a limiter circuit IC101 of 24V The 24V output is limited by this circuit Over Voltage Circuit If the 24V output increases because the error dete...

Страница 140: ... DIAGRAMS 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 140 KX FT21RS ...

Страница 141: ... R57 R120 C39 C47 C49 R11 RA4 F1 RA3 16 17 R10 RA2 RA1 IC1 PFUP1183ZA IC2 105 104 R100 Q1 R92 R17 CN1 8 1 R18 C33 R22 C36 C34 R21 R20 Q2 C32 J1 R14 D6 BAT1 Q11 R34 R30 C28 R101 Q3 Q4 R119 R121 R105 R117 R107 C24 R40 R94 C42 C62 R8 R13 R104 R29 R26 C44 L1 R103 X2 X3 R102 C84 IC6 8 7 14 1 Q12 R4 R6 R7 C20 C23 J4 1 C79 Q14 R63 L13 L14 L9 L8 R99 L11 L15 L10 L4 L12 F2 CN8 1 2 9 10 X1 IC4 R1 156 TP2 TP3...

Страница 142: ...IC5 IC3 14 1 15 28 1 8 16 9 C38 R27 R37 R25 C31 R12 L2 J8 D1 D7 R112 R113 C89 C29 C30 C35 C37 J6 R19 J5 J7 R24 R32 C25 R88 C80 R87 R31 R33 R59 C64 R43 R52 R111 Q6 C52 R42 R54 R51 R50 R49 C59 C58 J9 R9 C43 C46 C48 C87 C86 R36 C26 TP7 TP8 TP9 TP6 C21 C10 C88 R130 L25 R81 C17 C1 C92 C14 C13 L5 R122 R79 C78 C100 C77 Q13 D5 C73 C72 C70 PFUP1183ZA KX FT21RS 142 ...

Страница 143: ...R1 L6 L5 F1 L1 D6 JP6 D5 PC4 PC5 PC1 C230 C231 C106 C225 CN101 T101 2 1 IC1 C1 R3 R4 R23 PFUP1182ZA T102 CN102 1 10 CN202 1 10 R20 LF1 JP3 L8 L7 JP20 JP7 C13 C12 C2 C3 C16 R16 JP30 CN1 CN2 R7 R6 JP5 JP4 D3 Q4 Q7 E E Q6 C8 C7 D202 D201 E R15 ZNR2 D4 PC3 PC2 C9 C123 C122 C120 D203 C201 D101 D102 C213 C205 CN201 KX FT21RS 143 ...

Страница 144: ...C218 R218 R252 R229 R251 C222 R228 C223 C224 J402 J403 R124 C125 C126 R119 R227 C235 R121 C121 R120 R118 C118 C119 R203 R205 R204 R211 C211 C203 R217 R213 C214 R212 C212 R210 R202 R214 C208 C204 C207 C206 R114 R103 R102 R105 R106 R107 C102 C103 C104 C127 C109 C107 R113 C108 R10 R110 R107 R108 R109 C110 C111 C112 C113 C114 C116 C117 R117 R116 C227 R104 R112 Q5 R231 R230 R250 R111 1 4 8 5 C124 R123 ...

Страница 145: ... R106 R104 R110 L103 Q101 C109 C108 C107 D108 D105 D202 R205 J6 J5 J4 IC202 D201 IC201 C202 C205 C204 J10 J7 C201 CN301 1 8 C203 C105 D102 J1 J3 J2 D101 CN31 N L SRF913EK PRIMARY SECONDARY COMPONENT VIEW T3 15AH 250V F101 R125 R107 R122 S D G R127 R133 J8 T101 C223 R223 PC101 R121 R128 R129 R130 R131 R132 R224 R225 24 G G G 5 G C221 C224 CN301 R126 C121 C124 C122 R123 C123 1 8 5 R103 R102 CN31 68 ...

Страница 146: ...1 1 11 10 2 1 2 5 6 J40 J23 J39 J10 C9 C2 D1 J31 J43 J5 PS2 J17 SW1 SW9 SW23 J7 CN3 1 14 SW4 PS1 J24 SW16 SW11 SW26 SW19 SW20 SW5 SW12 SW27 SW30 SW8 SW15 AUTO CH PCB CH PFUP1146Z R14 R18 R16 R15 R2 R3 R4 R11 R10 R27 R6 R1 R9 R8 R12 Q2 R19 R17 R30 R28 R31 R32 R33 R34 R7 C6 C7 C8 R29 R5 C1 C5 C3 C4 Q3 R20 Q1 J18 J4 R13 IC1 8 9 16 1 BLACK Ð RED Q4 FOR CHECKER R21 R22 R23 R24 R25 R26 PFUP1146Z COMPONE...

Страница 147: ... CIS LED ARRAY ON 3 3V T5 3 3V 0V T4 T3 T2 OFF 0V MOTOR ON 3 3V OFF 0V PRINTING LATCH STB1 THERMAL HEAD TEMP STB2 DATA CLOCK 5V 0V 5V 0V 5V 0V 23 24V PRINTING 3 3V WATCH DOG ERROR 5V NORMAL 5V 0V WATCH DOG ERROR OCCUR FAX TX signal FAX RX signal KX FT21RS 147 ...

Страница 148: ...9 2 SCHEMATIC DIAGRAM ANALOG CIRCUIT FAX RX TEL TALK 2V FAX RX HANDSET TX NO PAPER 5V PAPER 0V FAX TX FAX RX 12V 2V 2 1V 0V 3 3V LINE ON OFF DIALPULSE BELL DETECT 5V 0V KX FT21RS 148 ...

Страница 149: ...470 35V C204 47 35V C203 1000 16V R121 10K R222 2 2K R221 2 2K R224 5K R225 IC201 3 3K VR201 27K R205 680 2W PC101 56 400V D101 TH101 D109 R105 0 22 2W R102 R123 R127 C124 1 8K 0 1 C121 R126 5 6K C122 0 22 C123 680p C109 47 35V 4700p R103 82K 82K R122 R133 R132 150K 150K 150K 120K R109 D106 R107 68 10 R131 R130 R129 120K 200K 2W R104 200K 2W R110 C108 D105 L103 1000p 1KV 150K 220 390 D103 D104 ZNR...

Страница 150: ...9 4 SCHEMATIC DIAGRAM OPERATION CIRCUIT OV 3 3V 5V 5V 0V 5V 0V 5V 0V PAPER 5V Document sensor sensor NO PAPER 0V Read position 5V 0V SENSOR SCAN 5V KEY SCAN 0V KX FT21RS 150 ...

Страница 151: ...10 TERMINAL GUIDE OF THE IC S TRANSISTORS AND DIODES 151 KX FT21RS ...

Страница 152: ...11 FIXTURES AND TOOLS 152 KX FT21RS ...

Страница 153: ...12 CABINET MECHANICAL AND ELECTRICAL PARTS LOCATION 12 1 OPERATION PANEL SECTION 153 KX FT21RS ...

Страница 154: ...12 2 UPPER CABINET SECTION 154 KX FT21RS ...

Страница 155: ...12 3 LOWER CABINET P C B SECTION 155 KX FT21RS ...

Страница 156: ...12 4 MOTOR SECTION Note Make sure that Gears 1 2 and 3 are installed face up The product number is put on the face 156 KX FT21RS ...

Страница 157: ...12 5 ACTUAL SIZE OF SCREWS AND WASHER 157 KX FT21RS ...

Страница 158: ...13 ACCESSORIES AND PACKING MATERIALS 158 KX FT21RS ...

Страница 159: ...13 PFDE1100Z LEVER READ DETECTION 14 PFUV1024Z COVER OPERATION 15 PQDR9685Y ROLLER SUPPORT 16 PFUS1171Z SPRING ROLLER 17 PFDF1017Z SHAFT 18 PFDJ1020Z PLATEN SPACER L 19 PFDN1033Z ROLLER PLATEN 20 PFDG1123Z GEAR PLATEN 21 PFHG1064Z SEPARATION RUBBER 22 PFDE1101Z LEVER ADJUSTMENT 23 PFUS1173Z SPRING DOCUMENT FEED 24 PFHX1251Z READING SHEET 25 PFDJ1021Z PLATEN SPACER R 26 PFBX1080Z1 KEY FUNCTION S 27...

Страница 160: ...FF IC IC4 PFVIS80842AN IC IC5 PFVITC35133F IC IC6 PFVIBU4066BF IC IC7 PQVIBA12003 IC S IC8 PQVINJM4558M IC S IC9 PQVINJM4558M IC S TRANSISTORS Q1 2SB1197K TRANSISTOR SI Ref No Part No Part Name Description Remarks Q2 2SA933 TRANSISTOR SI Q3 2SC4155R TRANSISTOR SI Q4 2SC4155R TRANSISTOR SI Q6 PQVTDTC114EU TRANSISTOR SI Q7 2SB1322 TRANSISTOR SI S Q8 PQVTDTC114EU TRANSISTOR SI Q10 2SC4155R TRANSISTOR...

Страница 161: ...40 ERJ3GEYJ473 47k R42 ERJ3GEYJ433 43k R43 ERJ3GEYJ224 220k R44 ERJ3GEYJ395 3 9M Ref No Part No Part Name Description Remarks R46 ERJ3GEYJ123 12k R49 ERJ3GEYJ683 68k R51 ERJ3GEYJ153 15k R52 ERJ3GEYJ224 220k R53 ERJ3GEYJ154 150k R54 ERJ3GEYJ105 1M R56 ERJ3GEYJ123 12k R57 ERJ3GEYJ224 220k R58 ERJ3GEYJ472 4 7k R59 ERJ3GEYJ334 330k R60 ERJ3GEYJ562 5 6k R62 ERJ3GEYJ393 39k R63 ERJ3GEYJ821 820 R64 ERDS1...

Страница 162: ...150P C62 PQCUV1C474KB 0 47 C63 PQCUV1C474KB 0 47 C64 PQCUV1H151JC 150P C65 PQCUV1C474KB 0 47 C66 ECUV1C104KBV 0 1 C67 ECUV1C473KBV 0 047 C74 ECUV1H222KBV 0 0022 C75 ECUV1H561JCV 560P C76 ECUV1E473KBV 0 047 C77 ECUV1C104KBV 0 1 C78 ECUV1H102KBV 0 001 C79 ECEA1CK101 100 S C80 ECUV1H104ZFV 0 1 S C82 PQCUV1E224MD 0 22 S Ref No Part No Part Name Description Remarks C83 ECUV1H104ZFV 0 1 S C85 ECEA1HKS10...

Страница 163: ...9 ERJ3GEYJ122 1 2k R110 ERJ3GEY0R00 0 R111 ERJ3GEYJ823 82k R112 ERJ3GEY0R00 0 R113 ERJ3GEYJ823 82k R114 ERJ3GEYJ222 2 2k R115 ERJ3GEYJ223 22k R116 ERJ3GEYJ223 22k R117 ERJ3GEYJ333 33k R118 ERJ3GEYJ114 110k R119 ERJ3GEYJ154 150k R120 ERJ3GEY0R00 0 R121 ERJ3GEYJ103 10k R122 ERJ3GEYJ153 15k R124 ERJ3GEYJ473 47k R201 ERJ3GEYJ331 330 R202 ERJ3GEYJ152 1 5k R203 ERJ3GEYJ152 1 5k R204 ERJ3GEYJ153 15k R205...

Страница 164: ...escription Remarks CN3 PFAVM190 LIQUID CRYSTAL DISPLAY PHOTO ELECTRIC TRANSDUCERS PS1 CNA1006N PHOTO ELECTRIC TRANSDUCER PS2 CNA1006N PHOTO ELECTRIC TRANSDUCER RESISTORS J18 ERJ3GEY0R00 0 J30 ERDS1TJ470 0 R2 ERJ3GEYJ103 10k R3 ERJ3GEYJ103 10k R4 ERJ3GEYJ103 10k R5 ERJ3GEYJ103 10k R7 ERJ3GEYJ103 10k R10 ERJ3GEYJ103 10k R11 ERJ3GEYJ271 270 R12 ERJ3GEYJ563 56k R13 ERJ3GEYJ103 10k R14 ERJ3GEYJ471 470 ...

Страница 165: ...ERDS2FJ150 15 R109 ERDS2FJ100 10 R110 ERG2DJ204 200k S R121 PQ4R10XJ103 10k S R122 PQ4R10XJ391 390 S Ref No Part No Part Name Description Remarks R123 PQ4R10XJ221 220 S R125 PQ4R10XJ103 10k S R126 PQ4R10XJ562 5 6k S R127 PQ4R10XJ182 1 8k S R128 PQ4R10XJ124 120k S R129 PQ4R10XJ124 120k S R130 PQ4R10XJ154 150k S R131 PQ4R10XJ154 150k S R132 PQ4R10XJ154 150k S R133 PQ4R10XJ154 150k S R205 ERG2SJ681 6...

Страница 166: ...ONNECTOR 13P EC3 PFZZ5K13Z CONNECTOR 5P EC4 PFZZ11K13Z CONNECTOR 11P EC5 PQZZ2K1Z CONNECTOR 2P EC6 PFZZ6K1Z CONNECTOR 6P EC7 PFZZ11K14Z CONNECTOR 11P EC8 PFZZ2K2Z CONNECTOR 2P EC9 PQZZ2K1Z CONNECTOR 2P EC10 PFZZ2K2Z CONNECTOR 2P KM79811245C0 BASIC FACSIMILE TECHNIQUE for training service technicians Notes Tools and Extension Cords are useful for servicing They make servicing easy 166 KX FT21RS Y Q...

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