Panasonic KX-FT25LA Service Manual Download

Page: 165 / 167

Ref.

No.

Part No.

Part Name & Description

Remarks

PQLQR1RM601

COIL

PQLQR1RM601

COIL

PQLQR1E32A07

COIL

PQLQR1E32A07

COIL

(PHOTO ELECTRIC TRANSDUCERS)

PC1

PQVIPC814K

PHOTO ELECTRIC TRANSDUCER

PC2

PFVITLP320

PHOTO ELECTRIC TRANSDUCER

(RELAY)

RLY1

PFSL001Z

RELAY

(VARISTORS)

SA1

PQVDRA311PT3

VARISTOR

SA2

PFVDRA102M

VARISTOR

(TRANSFORMER)

PFLT8E005

TRANSFORMER

(RESISTORS)

ERJ3GEYJ101

100

ERJ3GEYJ101

100

ERJ3GEYJ472

4.7k

ERJ3GEYJ472

4.7k

ERJ3GEYJ513

51k

ERJ3GEYJ823

82k

ERJ3GEYJ823

82k

ERJ3GEY0R00

ERJ3GEYJ103

10k

R10

ERJ3GEYJ622

6.2k

R11

ERJ3GEYJ563

56k

R12

ERJ3GEYJ123

12k

R13

ERJ3GEYJ563

56k

R14

ERDS2TJ471

470

R15

ERJ3GEYJ153

15k

R16

ERJ3GEYJ394

390k

R18

ERJ3GEYJ103

10k

R19

ERJ3GEYJ224

220k

R21

ERJ3GEYJ223

22k

R23

ERJ3GEYJ154

150k

R24

ERG2SJ151

150

R25

ERJ3GEYJ473

47k

R26

ERJ3GEYJ153

15k

R27

ERJ3GEYJ153

15k

R28

ERJ3GEYJ114

110k

R29

ERJ3GEYJ220

R30

ERJ3GEYJ331

330

R31

ERJ3GEYJ393

39k

R32

ERDS1TJ103

10k

R33

ERJ3GEYJ152

1.5k

R34

ERJ3GEYJ331

330

R35

ERJ3GEYJ152

1.5k

R36

ERDS2TJ221

220

R37

ERDS1TJ473

47k

R38

ERJ3GEYJ222

2.2k

R40

ERJ3GEYJ222

2.2k

R41

ERJ3GEYJ222

2.2k

Ref.

No.

Part No.

Part Name & Description

Remarks

R43

ERG2SJ122

1.2k

(CAPACITORS)

ECUV1H103KBV

0.01

ECUV1H103KBV

0.01

ECUV1H182KBV

0.0018

ECUV1H104ZFV

0.1

ECEA1HKS4R7

4.7

ECUV1H221JCV

220P

ECEA1CKS470

C10

ECUV1C104KBV

0.1

C14

ECUV1C104KBV

0.1

C16

ECUV1H103KBV

0.01

C17

ECEA1HKS4R7

4.7

C18

ECUV1H271JCV

270P

C19

ECUV1H102KBV

0.001

C24

ECUV1H472KBV

0.0047

C25

ECUV1H333KDV

0.033

C26

ECEA1CKS470

C29

ECUV1H333KDV

0.033

C30

ECUV1H103KBV

0.01

C31

ECEA1CKS100

C32

ECUV1H103KBV

0.01

C33

ECEA1CKS470

C34

ECUV1H103KBV

0.01

C35

ECQE2E105KZ

C36

ECUV1C273KBV

0.027

C39

ECUV1H103KBV

0.01

14.4. OPERATION BOARD PARTS

Ref.

No.

Part No.

Part Name & Description

Remarks

PCB3

PFLP1262BXZ

OPERATION BOARD ASS´Y(RTL)

(ICS)

IC1

PQVIMC4051BF

(TRANSISTORS)

PQVTDTA143EU

TRANSISTOR(SI)

PQVTDTA143EU

TRANSISTOR(SI)

PQVTDTA143EU

TRANSISTOR(SI)

2SC4155R

TRANSISTOR(SI)

(DIODE)

1SS131

DIODE(SI)

(CONNECTORS)

CN1

PFJS11A13Z

CONNECTOR,11PIN

CN2

PFJS08A13Z

CONNECTOR,8PIN

(LIQUID CRYSTAL DISPLAY)

CN3

PFAVM190

LIQUID CRYSTAL DISPLAY

(PHOTO ELECTRIC TRANSDUCERS)

PS1

CNA1006N

PHOTO ELECTRIC TRANSDUCER

165

KX-FT25LA

Summary of Contents for KX-FT25LA

Page 1: ...00 Kyushu Matsushita Electric Co Ltd All rights reserved Unauthorized copying and distribution is a violation of law KX FT25LA Latin America Facsimile with Telephone Answering system ORDER NO KMF0002393C3 ...

Page 2: ... SECTION 136 6 10 ATAS Automatic Telephone Answering System SECTION 136 6 11 OPERATION PANEL 138 6 12 POWER SUPPLY BOARD SECTION 140 7 FOR THE SCHEMATIC DIAGRAMS 142 8 PRINTED CIRCUIT BOARD 143 8 1 PRINTED CIRCUIT BOARD DIGITAL BOARD COMPONENT VIEW 143 8 2 PRINTED CIRCUIT BOARD DIGITAL BOARD BOTTOM VIEW 144 8 3 PRINTED CIRCUIT BOARD ANALOG BOARD COMPONENT VIEW 145 8 4 PRINTED CIRCUIT BOARD ANALOG ...

Page 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...

Page 4: ...1 5 AC CAUTION For safety before closing the lower cabinet please make sure of the following precautions 4 KX FT25LA ...

Page 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...

Page 6: ...on 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 Redialing function Temporary tone dialing Electric telephone directory Digital duplex speakerphone Digital answering system 20 minute recording time 1 7 FEATURES 6 KX FT25LA ...

Page 7: ...nment 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 7 0 W Transmission Approx 18 W Reception Approx 26 W When receiving the CCITT No 1 Test Chart Copy Approx 24 W When copying the CCITT No 1 Test Chart Maximum Approx 120 W When copying a 100 black document Power Supply 120...

Page 8: ...1 10 CCITT No 1 TEST CHART 8 KX FT25LA ...

Page 9: ...1 11 LOCATION OF CONTROLS 1 11 1 OVERVIEW 9 KX FT25LA ...

Page 10: ...1 11 2 CONTROL PANEL 10 KX FT25LA ...

Page 11: ...1 12 CONNECTIONS NOTE When you operate this products the power outlet should be near the product and easily accessible 11 KX FT25LA ...

Page 12: ...ay 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 will be printed If the recording paper is set to the wrong side the message will not be printed Install the paper correctly 1 13 2 Document Stacker Install the document stacker 12 KX FT25LA ...

Page 13: ...1 13 3 SETTING YOUR LOGO 13 KX FT25LA ...

Page 14: ... 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...

Page 15: ...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...

Page 16: ...1 14 2 1 MAINTENANCE LIST 1 14 2 2 MAINTENANCE CYCLE 16 KX FT25LA ...

Page 17: ...3 MAINTENANCE 1 14 3 1 CLEANING THE DOCUMENT FEEDER UNIT If misfeeding occurs frequently or if dirty patterns or black bands appear on a copied or transmitted document clean the document feeder 17 KX FT25LA ...

Page 18: ...ephone line cord Open the cover by pressing 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 w...

Page 19: ...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...

Page 20: ...2 2 USER RECOVERABLE ERRORS If the unit detects a problem the following messages will appear on the display 20 KX FT25LA ...

Page 21: ...2 2 1 Document Jam 21 KX FT25LA ...

Page 22: ...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...

Page 23: ...2 3 3 Simple Check List 23 KX FT25LA ...

Page 24: ...2 3 4 TROUBLESHOOTING ITEMS TABLE 24 KX FT25LA ...

Page 25: ...2 3 4 1 ADF Auto Document Feed Section 1 No document feed 25 KX FT25LA ...

Page 26: ...2 Document JAM 26 KX FT25LA ...

Page 27: ...3 Multiple feed When using thick paper etc If the document will not feed Refer to 3 1 ADJUSTING THE FEED PRESSURE 27 KX FT25LA ...

Page 28: ...4 Skew 28 KX FT25LA ...

Page 29: ...5 Image is distorted When printing 29 KX FT25LA ...

Page 30: ...6 Black or white vertical lines appear 7 Skewed receiving image 30 KX FT25LA ...

Page 31: ...8 Expander print When printing 9 When copying or printing an abnormal sound is heard from the unit 31 KX FT25LA ...

Page 32: ...32 KX FT25LA ...

Page 33: ...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 33 KX FT25LA ...

Page 34: ...2 3 4 2 1 Defective facsimile section 1 Transmit problem 34 KX FT25LA ...

Page 35: ...2 Sometimes there is a transmit problem 35 KX FT25LA ...

Page 36: ...e receiving 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 Please refer to 2 2 User Recoverable Errors for the above items Also when a hardware deformity occurs please check each sensor 36 KX FT25LA ...

Page 37: ...4 The unit can copy but cannot transmit receive 37 KX FT25LA ...

Page 38: ...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 ...

Page 39: ... 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...

Page 40: ...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 40 KX FT25LA ...

Page 41: ...7 How to output the Journal Report 41 KX FT25LA ...

Page 42: ...can 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 42 KX FT25LA ...

Page 43: ...Countermeasure 43 KX FT25LA ...

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Page 51: ...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...

Page 52: ...1 Entering the remote programming mode and changing service codes 52 KX FT25LA ...

Page 53: ...me set 01 99 X 10 msec 70 OK 503 Dial speed set 1 10pps 2 20 pps 10 OK 510 Vox time 1 6sec 2 4sec 6sec OK 520 CED frequency select 1 2100Hz 2 1100Hz 2100 OK 521 International mode select 1 ON 2 OFF ON OK 522 Auto standby select 1 ON 2 OFF ON OK 523 Receive equalizer select 1 0km 2 1 8km 3 3 6km 4 7 2km 0km OK 524 Transmission equalizer select 1 0km 2 1 8km 3 3 6km 4 7 2km 0km OK 533 Setting the nu...

Page 54: ... 2 60 sec 35 sec OK 774 T4 timer 00 99 X 100ms 00 OK 775 Monitoring of message transfer 1 ON 2 OFF OFF OK 815 Sensor check Press START NG 841 Digital SP Phone RX TX check 1 SP Phone NG 882 Journal 3 1 START NG 991 Transmit basic list 1 START OK 992 Transmit advanced list 1 START OK 994 Transmit journal report 1 START OK 999 Transmit service list 1 START OK OK Can set the value by the remote progra...

Page 55: ...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...

Page 56: ...2 3 4 3 1 Digital Block Diagram 56 KX FT25LA ...

Page 57: ... 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 57 KX FT25LA ...

Page 58: ...Normal Wave Patterns 58 KX FT25LA ...

Page 59: ...ns 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 diagra...

Page 60: ...60 KX FT25LA ...

Page 61: ...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 61 KX FT25LA ...

Page 62: ...62 KX FT25LA ...

Page 63: ...NG Example 63 KX FT25LA ...

Page 64: ...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 64 KX FT25LA ...

Page 65: ...ne 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 2 3 4 4 1 Check Seet 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 2 3 4 4 1 Check Sheet Note Inside the digital board Inside the ...

Page 66: ...Note Inside the digital board Inside the operation board 66 KX FT25LA ...

Page 67: ...2 3 4 4 2 Defective ITS Integrated Telephone System Section 67 KX FT25LA ...

Page 68: ...bleshooting procedures between the two types At the start of communication during the initial 2 3 correspondences the digital speakerphone performs half duplex operation alternating between transmission Tx and reception Rx Then duplex communication becomes available Learning occurs during the initial 2 3 correspondences in order to set the appropriate parameters for duplex communication You cannot...

Page 69: ...Refer to 2 3 4 4 Analog Board Section 69 KX FT25LA ...

Page 70: ... test etc Caution If you find a melted fuse in the unit don t turn the power on without repairing the unit first Except for the fuse If you do the fuse will melt again and the unit has not been repaired The problem exists somewhere else In most cases our experience the symptom is that nothing is output There is a high possibility in the primary side more than the secondary side In most cases our e...

Page 71: ...2 Troubleshooting Flow Chart 71 KX FT25LA ...

Page 72: ...72 KX FT25LA ...

Page 73: ...amage expands to the peripheral circuit of Q101 This is due to a very high voltage through the Gate circuit which is composed of R105 Q102 and D107 You should change all of the parts listed as follows F101 Q101 R105 Q102 D107 D201 If D201 is broken the oscillation circuit in the power supply cannot operate Check it with an electric tester D204 If D204 shorts the voltage feedback circuit is almost ...

Page 74: ...2 3 4 6 Operation Board Section 1 No key operation 2 No LCD indication 74 KX FT25LA ...

Page 75: ...2 3 4 7 Sensor Section Refer to 6 5 SENSORS AND SWITCHES for the circuit descriptions 1 Check the document sensor PS1 CHECK DOCUMENT 2 Check the read position PS2 REMOVE DOCUMENT 75 KX FT25LA ...

Page 76: ...2 3 4 8 Read Section Refer to 6 4 4 SCANNING BLOCK 76 KX FT25LA ...

Page 77: ...77 KX FT25LA ...

Page 78: ...2 3 4 9 Thermal Head Section Refer to 6 4 3 THERMAL HEAD 78 KX FT25LA ...

Page 79: ...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...

Page 80: ...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 80 KX FT25LA ...

Page 81: ...ed position 01 99 step 00 99 When the ADF function is incorrect adjust the feed position 8 step 1mm 550 Memory clear Press START COPY SET 551 ROM version and sum check Press START COPY SET 552 DTMF signal tone test 1 ON 2 OFF 1 2 OFF Press START COPY SET 553 Setting the FAX monitor function 1 OFF 2 PHASE B 3 ALL 1 2 3 OFF Sets whether to monitor the line signal with the unit s speaker during FAX c...

Page 82: ...to start training during FAX transmission 718 Receive speed select 1 9600BPS 2 7200BPS 3 4800BPS 4 2400BPS 1 4 9600 BPS Adjusts the speed to start training during FAX reception 719 Ringer off in TEL FAX mode 1 ON 2 OFF 1 2 ON Sets the ringer switch off when a call is received in the TEL FAX mode 721 Pause tone detect 1 ON 2 OFF 1 2 ON Selects the tone detection for pauses in dialing 722 Redial ton...

Page 83: ...2 4 5 SERVICE MODE SETTINGS Example of a printed out list Note The above values are the default values 83 KX FT25LA ...

Page 84: ...s Refer to 2 3 4 2 2 Remote programming The JOURNAL report only gives you basic information about a communication but the JOURNAL 3 report provide different information on the same item communication HOW TO READ JOURNAL REPORTS Example 1 Look at NO 01 in the JOURNAL If you want to know about the details about that item see NO 01 in the JOURNAL 3 You can get the following information MODE Fax trans...

Page 85: ...MT DTMF Means the unit detected DTMF Remote Fax activation code entered remotely 5 PAL DTMF Means the unit detected DTMF Remote Fax activation code entered by a parallel connected telephone 6 TURN 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 ...

Page 86: ...2 5 TEST FUNCTIONS 86 KX FT25LA ...

Page 87: ...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 87 KX FT25LA ...

Page 88: ...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 88 KX FT25LA ...

Page 89: ...4 DISASSEMBLY INSTRUCTIONS 89 KX FT25LA ...

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Page 98: ...98 KX FT25LA ...

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Page 100: ... 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...

Page 101: ...5 3 FLAT PACKAGE IC INSTALLATION PROCEDURE 5 4 BRIDGE MODIFICATION PROCEDURE 101 KX FT25LA ...

Page 102: ...6 CIRCUIT OPERATIONS 6 1 CONNECTION DIAGRAM 102 KX FT25LA ...

Page 103: ...e parameter working storage area 4 MODEM IC5 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 IC8 Drives the motor and CIS LED 8 Reset circuit IC3 Detects voltage at 5V power source outputs the signal which provides the reset signal for each IC to IC1 9 Analog board Compose...

Page 104: ...6 2 1 General Block Diagram 104 KX FT25LA ...

Page 105: ...6 3 CONTROL SECTION 6 3 1 BLOCK DIAGRAM 105 KX FT25LA ...

Page 106: ...MON Analog Analog monitor OPEN 5 VSSB Ground for analog video processing GND 6 VDDB Power supply for analog video processing 3 3V 7 3 3V BATT RTC backup power supply 3 3V BATT 8 X32OUT 3 3V BATT 32 768kHz crystal for RTC X32OUT 9 X32IN 3 3V BATT 32 768kHz crystal for RTC X32IN 10 VSS Ground GND 11 XBACKEN 5V BATT Backup enable XBACKEN 12 5V BATT RAMCS buffer Backup power supply for reset 5V BATT 1...

Page 107: ...ffer 5V 55 XTEST 5V 24MHz clock output XTEST O 56 TEST1 5V Test pin fixed High 5V 57 TEST2 5V Test pin fixed High 5V 58 TEST3 5V Test pin fixed High 5V 59 TEST4 5V Test pin fixed High 5V 60 XMDMINT 5V MODEM interrupt XMDMINT O 61 XMDMCS 5V MODEM chip selection XMDMCS O 62 VSS Ground GND 63 3 3V Power supply for internal logic 3 3V 64 XRAS IOP42 5V RAS input output port selection XMDMRST O 65 XCAS1...

Page 108: ... 118 THLAT 5V Thermal head latch TH LAT O 119 STBNP 5V Input port MOTOR POS I 120 RM0 IOP00 5V Motor control input output selection T5 O 121 RM1 IOP01 5V Motor control input output selection T4 O 122 RM2 IOP02 5V Motor control input output selection T3 O 123 RM3 IOP03 5V Motor control input output selection T2 O 124 RXE IP04 5V Motor control input selection T0 O 125 TM0 IOP10 5V Motor control inpu...

Page 109: ...pin 1 of the Reset IC IC3 resets the gate array IC1 1 During a power surge a positive reset pulse of 50 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 IC3 becomes low it will prohibit the RAM IC4 from changing data The RAM IC4 will go into the backup mode when it is backed up by a ...

Page 110: ... power is turned ON power is supplied RAM IC4 and RTC IC1 At this time the voltage at pin 28 of RAM is 5V and pin 7 of RTC IC1 is 3 3V When the power is turned OFF the battery supplies the power to RAM and RTC through J1 R16 D1 or DA1 At that time the voltage at pin 28 of RAM and pin 7 of IC1 are about 2 5V When the power is OFF and the 5V and 3 3V voltages decrease IC3 detects them and LOW is inp...

Page 111: ...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...

Page 112: ...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 112 KX FT25LA ...

Page 113: ...te black data stored as above 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 ou...

Page 114: ...6 4 2 Block Diagram 114 KX FT25LA ...

Page 115: ...t of dot increment 1728 all the shift registers become filled with data and a latch pulse is emitted to each IC from IC1 pin 118 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 105 106 only black dot locations 1 among latched data activates the driver and the current passes to heat t...

Page 116: ...116 KX FT25LA ...

Page 117: ...inside IC8 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 The analog image signal is input to the system LSI IC1 on ANA1 pin 1 of IC1 and converted into 8 bit data by the A D converter in...

Page 118: ... 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 ...

Page 119: ...ection 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 Transmit mode 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 119 KX FT25LA ...

Page 120: ...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...

Page 121: ...6 4 6 3 2 Scanning 6 4 6 3 3 Printing Note See 6 5 SENSERS AND SWITCHES 121 KX FT25LA ...

Page 122: ...6 4 6 3 4 Copying 122 KX FT25LA ...

Page 123: ... Circuit Location Sensor Sensor or Switch Name Message Error Digital SW3 Motor Position CALL SERVICE 2 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 123 KX FT25LA ...

Page 124: ...rding Paper Sensor SW1 When there is no recording paper the plate is separated from the switch lever and the switch turns off Pin 9 of CN1 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 CN1 Analog board becomes a low level Analog Board Signal CN1 9 Pin Paper Low level No paper High level 124 KX FT25LA ...

Page 125: ...el Operation Board Photo transistor Signal CN2 5 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 5 pin Operation becomes a high level When there is no document the shelter plate passes the sensor light the photo tr...

Page 126: ...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 ...

Page 127: ...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...

Page 128: ... 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...

Page 129: ...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...

Page 130: ...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...

Page 131: ...b Redundancy Compression Process Coding Mode This unit uses one dimensional MH format 131 KX FT25LA ...

Page 132: ...a which is received from the telephone line passes through the NCU section and enters pin 60 of the modem IC5 The signals that enter pin 60 of the modem IC5 are demodulated in the board to digital image signals then placed on the data bus In this case the image signals from the telephone line are transmitted serially Hence they are placed on the bus in 8 bit units Here the internal equalizer circu...

Page 133: ...6 7 Analog Unit Block Diagram 133 KX FT25LA ...

Page 134: ... this relay switches to the external telephone side Break and switches to the open side make when the unit starts facsimile communication IC1 67 High Level CN2 8 CN1 8 Q3 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 66 of ASIC IC1 on the digital board is read TEL LINE PC1 1 2 4 CN1 6 ...

Page 135: ... output from CN1 pin 11 passes through C6 C36 and R12 and enters the amplifier IC2 pin 3 This is used to cancel the return portion of the transmission signal This is the side tone circuit 6 8 6 CPC Calling Party Control DETECTION CIRCUIT 1 Function This circuit detects the signal cuts the current output from the converter when the other party finishes ICM recording and goes into the ON HOOK status...

Page 136: ... e the transmitted and received voices to and from the handset 2 Signal path Refer to 2 3 4 4 1 Check Sheet 6 9 4 MONITOR CIRCUIT FOR EACH SIGNALS 1 Function This circuit monitors various tones such as 1 DTMF tone 2 Alarm Beep Key tone Bell 3 Dummy ring back tone 2 Signal path Refer to 2 3 4 4 1 Check Sheet 6 10 ATAS Automatic Telephone Answering System SECTION 1 Function The ATAS main operation i...

Page 137: ...6 10 2 Circuit Diagram 137 KX FT25LA ...

Page 138: ...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 138 KX FT25LA ...

Page 139: ...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 139 KX FT25LA ...

Page 140: ...6 12 POWER SUPPLY BOARD SECTION 140 KX FT25LA ...

Page 141: ...e 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 transistor In this power supply the duty ratio is defined by changing the ON period of the main transistor This is shown as follows When the output voltage of the 24V circuit increases the curren...

Page 142: ... 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 142 KX FT25LA ...

Page 143: ... 2 8 10 IC3 C69 C71 R49 L13 R57 J5 R5 R6 R53 R52 R51 Q8 F3 E Q5 R56 R1 C2 R3 L22 L14 L23 L25 L16 R42 R43 C68 L18 L20 L24 L15 L17 L19 C76 CN8 C70 R48 1 36 37 144 R60 TEST DG 5V F2 C5 IC1 C94 R69 Q4 DA1 1 22 23 R12 C26 C25 C89 J1 C30 R19 R20 Q3 Q2 3 3V Q1 72 73 108 109 44 C7 10 2 1 9 L21 RA2 1 3 4 RA1 RA3 RA4 R35 L11 C64 R41 IC2 L6 IC5 RA7 RA8 C82 PFUP1184Z C81 C56 J4 R93 C113 8 14 1 7 5 16 4 8 5 1 ...

Page 144: ... R92 C104 R85 C105 R84 R76 R77 C51 C107 R83 C97 R75 Q9 R66 C86 R67 C87 D1 R21 3 3V BATT C31 R23 R22 R27 R18 C32 R24 D2 5V BATT C93 R25 R13 R14 C23 C24 R101 C18 C19 C8 C6 C3 C91 C13 C10 C9 C15 J2 R62 R70 F1 FTG DG L1 C16 C14 3 3V BATT C21 L2 EYEXY EYESYNC XCLK EYECLK RESET RESET1 MDM3 3V C90 A15 A14 A13 ANONI SIG XTEST R68 C88 C95 R73 C39 C40 L5 R102 C42 R31 C37 R34 C41 C96 C103 R39 R65 C85 C114 R8...

Page 145: ...4 CN3 J3 J4 J1 J2 C31 D5 D4 C6 C22 C15 C17 C33 C26 J11 J12 J13 J16 J17 J15 R37 R24 SA2 J8 C38 C20 R36 C35 D7 R43 RLY1 SA1 POS1 D6 R42 T2 T1 R32 J5 J7 CN4 L10 J6 PFUP1185Z J14 J20 J21 C11 PC1 PC2 SW2 CN2 1 2 SW1 D2 D1 J19 J18 C8 R22 CN1 J10 16 1 KX FT25LA 145 ...

Page 146: ...38 C13 R9 R10 C4 R4 C3 R5 C37 C39 C5 R41 R40 IC2 R11 C10 R8 R12 R7 C9 C36 R39 R13 C18 R16 C29 C25 C14 C40 C41 R28 R23 C19 R18 4 1 5 8 C32 L2 L1 R33 C30 C34 L4 L3 IC1 R15 R30 R35 R34 R29 Q2 R25 C24 R21 J10 C2 R2 R27 R26 R19 C21 C7 R6 1 4 5 24V DG 5VD 5VA AG PFUP1185Z KX FT25LA 146 ...

Page 147: ...103 C104 C106 R102 R103 R107 Q101 D202 R205 J6 J3 J5 IC202 D201 C202 C205 C204 J10 J9 J4 J11 J2 C201 CN301 1 8 C203 C105 C107 C109 D105 D102 J1 D101 D106 D205 D204 D107 CN31 N L SRF912UC PRIMARY SECONDARY C102 S D G Q201 E B C COMPONENT VIEW BOTTOM VIEW SRF912UC MITSUMI ELEC CO LTD 68 4492A KPC 7694V 0 94V 0 AC125V 5A F101 CN31 R112 R105 G D S R104 PC101 T101 R221 R222 J8 R225 CN301 R223 R111 R113...

Page 148: ...N1 1 11 10 2 1 2 7 8 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 PFUP1146Y 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 RED Q4 FOR CHECKER R21 R22 R23 R24 R25 R26 PFUP1146Y COMPONEN...

Page 149: ...7 6 0 L13 6 0 L24 6 0 IC8 1 I5 2 I4 3 I3 4 I2 5 I1 6 I0 7 I6 8 GND 9 COM 10 Q6 11 Q0 12 Q1 13 Q2 14 Q3 15 Q4 16 Q5 100 R53 6 NC D4 4 CN8 0 1 SIG 2 GND 3 5V 4 SEL 5 GND 6 SI 7 GND 8 CLK 9 G LED 10 V LED 0 J2 4 NC R62 4 100 L16 6 6 8 R48 6 820 R47 4 5V 4 7K R63 4 47 R55 6 NC R60 6 NC C69 6 0 D5 5V CN7 0 11 KSTART 10 KIN3 9 KIN2 8 KIN1 7 KIN0 6 E 5 RS 4 OPESEL 3 FG 2 5V 1 NC 20K R58 6 0 L21 6 0 L23 6...

Page 150: ...R28 CN4 0 4 a 3 b C15 NC 3 C17 50V4 7 3 CN1 0 1 24V 2 DG 3 5VD 4 5VA 5 AG 6 BELL 7 CPC 8 RLY 9 PAPER 10 RX 11 TX 12 HOOK 13 SPMUTE 14 H STX 15 SPOUT 16 H SRX R9 10K 4 R10 6 2K 4 C8 6 3V47 3 C4 NC 4 2 0V C2 K0 01 4 R2 100 4 R4 4 7K 4 R1 100 4 5VD R3 4 7K 4 C1 K0 01 4 R22 0 2 C22 NC 3 R23 150K 4 J7 NC 1 J8 NC 1 J2 NC 1 J4 0 1 J1 0 1 J3 NC 1 R29 22 4 R25 47K 4 C26 6 3V 47uF 3 R30 330 4 R32 10K 1 2W 2...

Page 151: ... 10 R109 D105 5 1K C103 L101 R113 R112 R111 330K 330K 330K C101 0 1 GND F101 5A125V CN31 1 2 L N C104 2200p 2200p C105 220pF C106 R102 220K R103 220K C107 330p R101 5 6 2 680 2 R205 C201 D204 470 35 680 2 R206 C207 47 35 C203 470 16 R104 15K R222 4 7K R221 680 R221 2 2K R224 22K R225 Q201 D203 12K VR201 5K PC101 180 200 D101 D103 D104 ZNR102 ZNR101 470V 470V Cycle 2 2 s Cycle 2 2 s 5V 300V 0V Cycl...

Page 152: ...DIAGRAM OPERATION CIRCUIT 22k 680p 560k K 0 1 K 0 01 6 3V 47u 6 8k 330 330 3 3k OV 3 3V 5V 5V 2V 0V 5V 0V 5V 0V PAPER 5V Document sensor sensor NO PAPER 0V Read position 5V 0V SENSOR SCAN 5V KEY SCAN 0V KX FT25LA 152 ...

Page 153: ...10 TERMINAL GUIDE OF THE IC S TRANSISTORS AND DIODES 153 KX FT25LA ...

Page 154: ...11 FIXTURES AND TOOLS 154 KX FT25LA ...

Page 155: ...12 CABINET MECHANICAL AND ELECTRICAL PARTS LOCATION 12 1 OPERATION PANEL SECTION 155 KX FT25LA ...

Page 156: ...12 2 UPPER CABINET SECTION 156 KX FT25LA ...

Page 157: ...12 3 LOWER CABINET P C B SECTION 157 KX FT25LA ...

Page 158: ...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 158 KX FT25LA ...

Page 159: ...12 5 ACTUAL SIZE OF SCREWS AND WASHER 159 KX FT25LA ...

Page 160: ...13 ACCESSORIES AND PACKING MATERIALS 160 KX FT25LA ...

Page 161: ... PFDE1096Z LEVER DOCUMENT DETECTION 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 SPAC...

Page 162: ...C ROM IC3 PFVIS80842AN IC IC4 PFVIGM6256FF IC IC5 PFVIR675814 IC IC6 PFVIKM29W4AT IC IC7 PFVIMM1385EN IC IC8 PQVIBA12003 IC S IC9 PFVIBU4066BF IC IC10 PQVINJM4558M IC S IC11 PQVINJM4558M IC S Ref No Part No Part Name Description Remarks TRANSISTORS Q3 2SC4155S TRANSISTOR SI Q4 2SC4155S TRANSISTOR SI Q5 2SB1322 TRANSISTOR SI S Q7 PQVTDTC114EU TRANSISTOR SI Q8 PQVTDTC114EU TRANSISTOR SI Q9 2SC4155R ...

Page 163: ...472 4 7k R43 ERJ3GEYJ102 1k R44 ERJ3GEY0R00 0 Ref No Part No Part Name Description Remarks R45 ERJ3GEY0R00 0 R46 ERJ3GEYJ151 150 R47 ERJ3GEYJ821 820 R48 ERJ3GEYJ6R8 6 8 R49 ERJ3GEY0R00 0 R50 ERJ3GEYJ101 100 R51 ERJ3GEYJ101 100 R52 ERJ3GEY0R00 0 R53 ERJ3GEYJ101 100 R54 ERJ3GEYJ823 82k R55 ERJ3GEYJ470 47 R56 ERDS1TJ222 2 2k S R57 ERJ3GEYJ223 22k R58 ERJ3GEYJ203 20k R61 ERJ3GEYJ562 5 6k R63 ERJ3GEYJ4...

Page 164: ... 0 1 S C65 ECUV1H104ZFV 0 1 S C66 ECEA0JK221 220 S C68 ECUV1H102KBV 0 001 C70 ECUV1C224ZFV 0 22 C76 ECEA1CK101 100 S C77 ECUV1H222KBV 0 0022 C78 ECUV1H561JCV 560P C79 PQCUV1E473MD 0 047 C81 ECEA0JK221 220 S C83 ECUV1H104ZFV 0 1 S C84 PQCUV1H104ZF 0 1 C85 ECUV1H104ZFV 0 1 S C86 PQCUV1H104ZF 0 1 Ref No Part No Part Name Description Remarks C87 ECUV1H104ZFV 0 1 S C89 ECEA1HKS100 10 S C91 ECUV1H104ZFV...

Page 165: ...S2TJ221 220 R37 ERDS1TJ473 47k R38 ERJ3GEYJ222 2 2k R40 ERJ3GEYJ222 2 2k R41 ERJ3GEYJ222 2 2k Ref No Part No Part Name Description Remarks R43 ERG2SJ122 1 2k CAPACITORS C1 ECUV1H103KBV 0 01 C2 ECUV1H103KBV 0 01 C3 ECUV1H182KBV 0 0018 C5 ECUV1H104ZFV 0 1 S C6 ECEA1HKS4R7 4 7 S C7 ECUV1H221JCV 220P C8 ECEA1CKS470 47 S C10 ECUV1C104KBV 0 1 C14 ECUV1C104KBV 0 1 C16 ECUV1H103KBV 0 01 C17 ECEA1HKS4R7 4 ...

Page 166: ...31 330 R8 ERJ3GEYJ564 560k R9 ERJ3GEYJ223 22k R10 ERJ3GEYJ103 10k R11 ERJ3GEYJ271 270 R12 ERJ3GEYJ563 56k R13 ERJ3GEYJ103 10k R14 ERJ3GEYJ471 470 R15 ERJ3GEYJ103 10k R16 ERJ3GEYJ471 470 R17 ERJ3GEYJ103 10k R18 ERJ3GEYJ471 470 R19 ERJ3GEYJ103 10k R20 ERJ3GEYJ471 470 R22 ERJ3GEY0R00 0 R27 ERJ3GEYJ331 330 R29 ERJ3GEYJ682 6 8k R30 ERJ3GEYJ681 680 Ref No Part No Part Name Description Remarks CAPACITORS...

Page 167: ... C103 ECKNTS222ME 0 0022 C104 ECKNTS222ME 0 0022 C105 ECKNTS222ME 0 0022 C106 PFEU200SX180 180 S C107 ECKZ3A331KB 330P S C109 ECQB1H103JF 0 01 C110 PQCUV1H682KB 0 0068 S C201 EEUFA1V471 470 C202 ECKD3A102KBP 0 001 C203 PFCEA16A470 47P S C205 PFCEA50A1M 1 S C207 PFCEA35A47M 47 S 14 6 FIXTURES AND TOOLS Ref No Part No Part Name Description Remarks EC1 PQZZ8K18Z CONNECTOR 8P EC2 PFZZ13K1Z CONNECTOR 1...

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