Panasonic KX-FT902LS-B Page 20 Service Manual Download

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4 MAINTENANCE

4.1. MAINTENANCE ITEMS AND COMPONENT LOCATIONS

4.1.1. 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.

If the equipment can be still used, perform copying, self testing or communication testing.

3. Check equipment

Perform copying, self testing and communication testing to determine if the problem originates from the transmitter, receiver or
the telephone line.

4. Determine causes

Determine the causes of the 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, conduct copying, self testing and communication testing to confirm that the equipment operates
normally.

7. Record keeping

Make a record of the measures taken to rectify the problem for future reference.

4.1.2. COMPONENT LOCATIONS

KX-FT902LS-B / KX-FT904LS-B

Summary of Contents for KX-FT902LS-B

Page 1: ...D FREE PbF SOLDERING If lead free solder was used in the manufacture of this product the printed circuit boards will be marked PbF Standard leaded Pb solder can be used as usual on boards without the PbF mark When this mark does appear please read and follow the special instructions described in this manual on the use of PbF and how it might be permissible to use Pb solder during service and repai...

Page 2: ...RABLE ERRORS 43 7 3 PROGRAMMING AND LISTS 44 7 4 TEST FUNCTIONS 47 7 5 TROUBLESHOOTING DETAILS 56 8 CIRCUIT OPERATIONS 106 8 1 CONNECTION DIAGRAM 106 8 2 GENERAL BLOCK DIAGRAM 107 8 3 CONTROL SECTION 109 8 4 FACSIMILE SECTION 116 8 5 SENSORS AND SWITCHES 126 8 6 MODEM SECTION 130 8 7 ANALOG UNIT BLOCK DIAGRAM 137 8 8 NCU SECTION 138 8 9 ITS INTEGRATED TELEPHONE SYSTEM AND MONITOR SECTION 140 8 10 ...

Page 3: ...1 INTRODUCTION 1 1 TRANSLATION LISTS 1 1 1 HELP FUNCTION 1 1 2 ERROR MESSAGES 1 1 2 1 DISPLAY 3 KX FT902LS B KX FT904LS B ...

Page 4: ...1 1 2 2 REPORTS 1 1 3 OTHERS 4 KX FT902LS B KX FT904LS B ...

Page 5: ...l not to heat too long PbF solder will tend to splash if it is heated much higher than its melting point approximately 1100 F 600 C If you must use Pb solder on a PCB manufactured using PbF solder remove as much of the original PbF solder as possible and be sure that any remaining is melted prior to applying the Pb solder When applying PbF solder to double layered boards please check the component...

Page 6: ...TO RECOGNIZE THAT Pb FREE SOLDER IS USED P C Boards marked as PbF use Pb Free solder See the figure below Pb Free is not used the Power Supply Board of this unit Example Digital Board 6 KX FT902LS B KX FT904LS B ...

Page 7: ...e 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 1 5 FOR SERVICE TECHNICIANS ICs and LSIs are vulnerable to static electricity When repairing the following precautions will help prevent recurring malfunctions 1 Cover the plastic part s boxes with aluminum f...

Page 8: ...CAUTIONS 1 8 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 A gear rotates the two rollers Be careful not to touch them with your hands especial...

Page 9: ...g the AC power cord before disassembling for service 1 9 SERVICE PRECAUTIONS 1 9 1 PRECAUTIONS TO PREVENT DAMAGE FROM STATIC ELECTRICITY Electrical charges accumulate on a person For instance clothes rubbing together can damage electric elements or change their electrical characteristics In order to prevent static electricity touch a metallic part that is grounded to release the static electricity...

Page 10: ... 10 Sheets Easy to view LCD 15 Characters Broadcast up to 10 Stations Integrated telephone system One touch dial 22 items Navigator directory 100 items 2 2 OPTIONAL ACCESSORIES Model No Description Specifications KX A106 Standard thermal recording paper 216 mm 30 m roll with 25 mm core Note Only use the included specified recording paper or else the print quality may be affected and or excessive t...

Page 11: ...pprox 40 W When receiving a 20 black document Copy Approx 40 W When copying a 20 black document Maximum Approx 125 W When receiving a 100 black document Power Supply 220 240 V AC 50 60 Hz Fax Memory Capacity KX FT904LS B ONLY Approx 20 pages of document memory Based on the ITU T No 1 Test Chart in standard resolution 1 Transmission speed depends upon the contents of the pages resolution telephone ...

Page 12: ...paper stacker may not be shown in all illustrations in this operating instructions 5 Document exit 6 Document entrance 7 Cover open button Note Remove all the blue shipping tapes before installation 3 INSTALLATION 3 1 LOCATION OF CONTROLS 3 1 1 FRONT VIEW 12 KX FT902LS B KX FT904LS B ...

Page 13: ...utton the unit will automatically redial the number up to 5 times To insert a pause during dialling 14 MUTE To mute your voice to the other party during a conversation Press this button again to resume the conversation 15 MONITOR To initiate dialling without lifting the handset 16 MENU To initiate or exit programming 17 NAVIGATOR VOLUME To adjust volume To search for a stored item To select featur...

Page 14: ... Remove the stopper if attached 6 Extension telephone not included Caution When you operate this product the power outlet should be near the product and easily accessible Be sure to use the telephone line cord included in this unit Do not extend the telephone line cord Note To avoid malfunction do not position fax machine near appliance such as TVs or speakers which generate an intense magnetic fi...

Page 15: ...ithout condensation Power cord length should be less than 5 meters Using a longer cord may reduce the voltage or cause malfunctions Avoid direct sunlight Do not install near devices which contain magnets or generate magnetic fields Do not subject the unit to strong physical shock or vibration Keep the unit clean Dust accumulation can prevent the unit from functioning properly To protect the unit f...

Page 16: ... START then tear off the excess paper by pulling it towards you 6 KX FT904LS B Press FAX START to cut the paper Note If the paper is secured with glue or tape cut approximately 15 cm from the beginning of the roll before installing it When the power cord is connected a message is printed each time the cover is opened then closed If the recording paper is installed upside down the massage will not ...

Page 17: ...r Badly 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 other side i e newspaper Check that ink paste or correction fluid has dried completely To transmit the document with a width of less than standard A4 size 210 mm we recommend using a copy machine to copy the original document onto A4 or let...

Page 18: ...and make the correction To delete a character Press or to move the cursor to the character you want to delete and press STOP 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 MUTE to insert a space and enter the character 4 Press SET The underbar shows a position of the cursor 5 Enter your logo up to 30 characters See...

Page 19: ... the following order a Uppercase letters b Number c Symbol d Lowercase letters If you press the order will be reversed 2 Press to insert the character The character displayed in step 1 is inserted 3 Return to step 1 to enter the next character 3 3 5 1 TO SELECT CHARACTERS WITH THE DIAL KEYPAD Pressing the dial keys will select a character as shown below 19 KX FT902LS B KX FT904LS B ...

Page 20: ...ation testing to determine if the problem originates from the transmitter receiver or the telephone line 4 Determine causes Determine the causes of the 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 re...

Page 21: ...C INLET P 35 6 Glass If the glass is dirty clean with a dry soft cloth Refer to DOCUMENT FEEDER P 23 7 Abnormal wear and tear or loose parts Replace the part Check if the screws are tight on all parts 4 1 2 2 MAINTENANCE CYCLE No Item Cleaning Cycle Replacement Cycle Procedure 1 Separation Roller Ref No 141 3 months 7 years 10 000 documents Refer to HOW TO REMOVE THE MOTOR BLOCK P 37 2 Separation ...

Page 22: ...e released 3 Remove the recording paper 4 Cut off the wrinkled portion 5 Install the recording paper and close the cover securely by pushing down on both sides 4 2 JAMS 4 2 1 RECORDING PAPER JAMS When the recording paper has jammed in the unit The display will show the following Refer to TRANSLATION LISTS P 3 22 KX FT902LS B KX FT904LS B ...

Page 23: ...s appear on the original document when transmitting or copying 1 Disconnect the power cord and the telephone line cord 2 Open the cover by pressing the cover open button 3 Clean the document feeder rollers and rubber flap with a cloth moistened with isopropyl rubbing alcohol and let all parts dry thoroughly Clean the white plate and scanner glass with a soft and dry cloth Caution Do not use paper ...

Page 24: ...cover open button and remove the recording paper 3 Clean the thermal head and head cover with a cloth moistened with isopropyl rubbing alcohol and let all parts dry thoroughly Caution To prevent a malfunction due to static electricity do not use a dry cloth and do not touch the thermal head directly 4 Connect the power cord and the telephone line cord 5 Install the recording paper and close the co...

Page 25: ...EMOVE THE PAPER STACKER KX FT904LS B ONLY P 27 A 2 HOW TO REMOVE THE OPERATION PANEL BLOCK P 28 A 3 HOW TO REMOVE THE OPERATION BOARD AND LCD P 29 A 4 HOW TO REMOVE THE IMAGE SENSOR P 30 A 5 HOW TO REMOVE THE THERMAL HEAD AND CUTTER UNIT P 31 A 6 HOW TO REMOVE THE DOCUMENT TRAY P 32 25 KX FT902LS B KX FT904LS B ...

Page 26: ...MOVE THE OPERATION PANEL BLOCK P 28 B 1 HOW TO REMOVE THE BOTTOM FRAME P 33 B 2 HOW TO REMOVE THE HANDSET CRADLE CABINET AND SPEAKER P 34 B 3 HOW TO REMOVE THE DIGITAL ANALOG AND POWER SUPPLY BOARD AND AC INLET P 35 B 4 HOW TO REMOVE THE ROLLERS P 36 B 5 HOW TO REMOVE THE MOTOR BLOCK P 37 26 KX FT902LS B KX FT904LS B ...

Page 27: ...6 DISASSEMBLY INSTRUCTIONS 6 1 HOW TO REMOVE THE PAPER STACKER KX FT904LS B ONLY 27 KX FT902LS B KX FT904LS B ...

Page 28: ...6 2 HOW TO REMOVE THE OPERATION PANEL BLOCK 28 KX FT902LS B KX FT904LS B ...

Page 29: ...6 3 HOW TO REMOVE THE OPERATION BOARD AND LCD 29 KX FT902LS B KX FT904LS B ...

Page 30: ...6 4 HOW TO REMOVE THE IMAGE SENSOR 30 KX FT902LS B KX FT904LS B ...

Page 31: ...6 5 HOW TO REMOVE THE THERMAL HEAD AND CUTTER UNIT 31 KX FT902LS B KX FT904LS B ...

Page 32: ...6 6 HOW TO REMOVE THE DOCUMENT TRAY 32 KX FT902LS B KX FT904LS B ...

Page 33: ...6 7 HOW TO REMOVE THE BOTTOM FRAME 33 KX FT902LS B KX FT904LS B ...

Page 34: ...6 8 HOW TO REMOVE THE HANDSET CRADLE CABINET AND SPEAKER 34 KX FT902LS B KX FT904LS B ...

Page 35: ...6 9 HOW TO REMOVE THE DIGITAL ANALOG AND POWER SUPPLY BOARD AND AC INLET 35 KX FT902LS B KX FT904LS B ...

Page 36: ...6 10 HOW TO REMOVE THE ROLLERS 36 KX FT902LS B KX FT904LS B ...

Page 37: ...6 11 HOW TO REMOVE THE MOTOR BLOCK 37 KX FT902LS B KX FT904LS B ...

Page 38: ...CROSS REFERENCE HOW TO REMOVE THE THERMAL HEAD AND CUTTER UNIT P 31 38 KX FT902LS B KX FT904LS B ...

Page 39: ...39 KX FT902LS B KX FT904LS B ...

Page 40: ...6 12 INSTALLATION POSITION OF THE LEAD WIRES 40 KX FT902LS B KX FT904LS B ...

Page 41: ...6 13 INSTALLATION OF THERMAL HEAD 41 KX FT902LS B KX FT904LS B ...

Page 42: ...ck 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 troubleshooting double check that you have not ...

Page 43: ...ore new items in navigator directory Erase unnecessary items The unit has a document in memory See the other displayed message instructions to print out the document There is no memory available to receive fax documents and record voice messages Print out the documents in memory or erase unnecessary messages The other party s fax machine is busy or has run out of recording paper Try again A record...

Page 44: ...s 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 Functions are accessed by ...

Page 45: ...signal tone test 1 ON 2 OFF 1 2 2 See TEST FUNCTIONS P 47 553 Setting the FAX monitor function 1 OFF 2 PHASE B 3 ALL 1 2 3 1 Sets whether to monitor the line signal with the unit s speaker during FAX communication or not 554 Modem test See TEST FUNCTIONS P 47 555 Scanner test See TEST FUNCTIONS P 47 556 Motor test See TEST FUNCTIONS P 47 557 LED test See TEST FUNCTIONS P 47 558 LCD test See TEST F...

Page 46: ...ory data To reset the value to the default one except History data Please restart a power supply after clearing a memory 717 Transmit speed select 1 9600BPS 2 7200BPS 3 4800BPS 4 2400BPS 1 4 1 Adjusts the speed to start training during FAX transmission 718 Receive speed select 1 9600BPS 2 7200BPS 3 4800BPS 4 2400BPS 1 4 1 Adjusts the speed to start training during FAX reception 719 Ringer off in T...

Page 47: ...ad systems Refer to READ SECTION P 103 START LCD CHECK Service Mode 5 5 8 Check the LCD indication Illuminates all the dots to check if they are normal Refer to OPERATION PANEL SECTION P 153 START DTMF SINGLE TEST Service Mode 5 5 2 Outputs the DTMF as single tones Used to check the frequencies of the individual DTMF tones Refer to DTMF SINGLE TONE TRANSMIT SELECTION P 48 1 ON 2 OFF KEY CHECK Serv...

Page 48: ...f Otherwise dialing in DTMF signal will not work 7 4 2 BUTTON CODE TABLE Code Button Name Code Button Name Code Button Name 03 AUTO ANSWER 32 2 01 STOP 04 FAX START 33 3 5A STATION 1 05 MENU 34 4 5B STATION 2 07 HELP 35 5 5C STATION 3 08 MONITOR 36 6 5D STATION 4 09 COPY 37 7 5E STATION 5 0A MUTE 38 8 5F STATION 6 0B PREV 39 9 60 STATION 7 0C NEXT 3A 0 61 STATION 8 0D VOLUME 3B 62 STATION 9 0E VOL...

Page 49: ...ters for the desired codes can be changed The procedure for changing and listing parameters is described on ENTERING THE REMOTE PROGRAMMING MODE AND CHANGING SERVICE CODES P 49 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 connected telephone is in use during the remote programming mode i...

Page 50: ...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 544 Document feed position adjustment value set 01 99 step 50 OK 550 Memory clear Press START NG 551 ROM check Press START NG 552 DTMFsignal tone test 1 ON 2 OFF OFF 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...

Page 51: ...2 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 programming feature or print a list NG Cannot set the value Note Note Refer to SERVICE FUNCTION TABLE P 45 for descriptions of the individual codes For example the 004 Transmission report mode ...

Page 52: ...7 4 5 USER MODE The list below is an example of the SYSTEM SETUP LIST the unit prints out 7 4 5 1 KX FT904LS B Note The above values are the default values 52 KX FT902LS B KX FT904LS B ...

Page 53: ...7 4 5 2 KX FT904LS B Note The above values are the default values 53 KX FT902LS B KX FT904LS B ...

Page 54: ...7 4 6 SERVICE MODE SETTINGS Example of a printed out list 7 4 6 1 KX FT902LS B 54 KX FT902LS B KX FT904LS B ...

Page 55: ...7 4 6 2 KX FT904LS B 55 KX FT902LS B KX FT904LS B ...

Page 56: ...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 7 5 2 STARTING TROUBLESHOOTING Select the appropriate troubleshooting method according to...

Page 57: ... DEFECTIVE ITS INTEGRATED TELEPHONE SYSTEM SECTION P 98 Error code is displayed See HOW TO OUTPUT THE JOURNAL REPORT P 74 Cannot talk See ANALOG BOARD SECTION P 96 DTMF tone doesn t work Handset Monitor sound volume 7 5 3 1 SIMPLE CHECK LIST SERIAL NO DATE FUNCTION JUDGEMENT REFERENCE FAX operation Transmission OK NG Receiving OK NG Copy operation FINE mode OK NG PHOTO mode OK NG Telephone operati...

Page 58: ...CUMENT FEED SECTION 7 5 4 1 NO DOCUMENT FEED CROSS REFERENCE DIGITAL BOARD SECTION P 85 POWER SUPPLY BOARD SECTION P 99 SENSOR SECTION P 103 TEST FUNCTIONS P 47 DISASSEMBLY INSTRUCTIONS P 27 58 KX FT902LS B KX FT904LS B ...

Page 59: ...7 5 4 2 DOCUMENT JAM CROSS REFERENCE SENSOR SECTION P 103 DISASSEMBLY INSTRUCTIONS P 27 59 KX FT902LS B KX FT904LS B ...

Page 60: ...7 5 4 3 MULTIPLE FEED When using thick paper etc If the document will not feed CROSS REFERENCE DISASSEMBLY INSTRUCTIONS P 27 60 KX FT902LS B KX FT904LS B ...

Page 61: ...7 5 4 4 SKEW CROSS REFERENCE DISASSEMBLY INSTRUCTIONS P 27 61 KX FT902LS B KX FT904LS B ...

Page 62: ...7 5 4 5 IMAGE IS DISTORTED WHEN PRINTING CROSS REFERENCE READ SECTION P 103 THERMAL HEAD SECTION P 105 TEST FUNCTIONS P 47 DISASSEMBLY INSTRUCTIONS P 27 62 KX FT902LS B KX FT904LS B ...

Page 63: ...7 5 4 6 BLACK OR WHITE VERTICAL LINES APPEAR CROSS REFERENCE DIGITAL BOARD SECTION P 85 TEST FUNCTIONS P 47 7 5 4 7 SKEWED RECEIVING IMAGE 63 KX FT902LS B KX FT904LS B ...

Page 64: ...7 5 4 8 EXPANDER PRINT WHEN PRINTING CROSS REFERENCE DISASSEMBLY INSTRUCTIONS P 27 7 5 4 9 WHEN COPYING OR PRINTING AN ABNORMAL SOUND IS HEARD FROM THE UNIT 64 KX FT902LS B KX FT904LS B ...

Page 65: ... with the receiver s fax 3 The fax receives successfully one time and fails another Copying is possible Troubleshooting Problem with the service line or with the transmitter s fax 4 The fax completely fails to transmit or receive The unit can copy documents Troubleshooting Problem with the electric circuit 5 The fax fails either to transmit or receive when making a long distance or an internationa...

Page 66: ...efer to TRANSLATION LISTS P 3 7 5 5 1 DEFECTIVE FACSIMILE SECTION 7 5 5 1 1 TRANSMIT PROBLEM CROSS REFERENCE ADF AUTO DOCUMENT FEED SECTION P 58 OPERATION BOARD SECTION P 102 66 KX FT902LS B KX FT904LS B ...

Page 67: ...7 5 5 1 2 SOMETIMES THERE IS A TRANSMIT PROBLEM 67 KX FT902LS B KX FT904LS B ...

Page 68: ...eiving problem when sometimes the below errors may be occurred OUT OF PAPER CHHECK COVER UNIT OVERHEATED If it doesn t return automatically COVER OPEN etc reset the unit CHECK DOCUMENT Please refer to USER RECOVERABLE ERRORS P 43 for the above items Also when a hardware deformity occurs please check each sensor 68 KX FT902LS B KX FT904LS B ...

Page 69: ...7 5 5 1 4 THE UNIT CAN COPY BUT CANNOT TRANSMIT RECEIVE 69 KX FT902LS B KX FT904LS B ...

Page 70: ...n 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 stat...

Page 71: ... 75 msec between the CED signal and DIS signal to 500 msec This will give at least 250 msec to recover the echo canceler operation Refer to Fig c Service code 593 Time between CED and 300 bps Sending side The sending side FAX sends a DCS signal not after receiving the 1st DIS signal but after receiving the 2nd DIS signal Refer to Fig d Service code 594 Overseas DIS detection select 3 Sending side ...

Page 72: ... RECEPTION IMAGE ARE INCORRECT Long distance or international communication operation This symptom highly depends on the transmission 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 mo...

Page 73: ...X SIGNAL RECORDING JIG 3 Connecting PC and JIG 4 PC setting and recording 1 Set LINE IN to be valid in the volume control setting Refer to the PC instruction book 2 Start up the PC software SOUND RECORDER This software is bundled to Windows OS which can create WAV file Set the audio format PCM 22 050kHz 8bit mono 3 Click the record button and start recording after acquisition the signal Note Not t...

Page 74: ...ponse after FTT is transmitted 5 48 COMMUNICATION ERROR SND No post message 6 49 COMMUNICATION ERROR SND RTN is transmitted 7 50 COMMUNICATION ERROR SND PIN is transmitted to PRI Q 8 51 COMMUNICATION ERROR SND PIN is transmitted 8 52 COMMUNICATION ERROR SND Reception is finished when the T1 TIMER expires 8 53 ERROR NOT YOUR UNIT RCV DCN is received after transmission of NSC and DTC 9 54 ERROR NOT ...

Page 75: ...Countermeasure 75 KX FT902LS B KX FT904LS B ...

Page 76: ...76 KX FT902LS B KX FT904LS B ...

Page 77: ...77 KX FT902LS B KX FT904LS B ...

Page 78: ...78 KX FT902LS B KX FT904LS B ...

Page 79: ...79 KX FT902LS B KX FT904LS B ...

Page 80: ...80 KX FT902LS B KX FT904LS B ...

Page 81: ...81 KX FT902LS B KX FT904LS B ...

Page 82: ...82 KX FT902LS B KX FT904LS B ...

Page 83: ...3 shown below which are special journals giving the additional detailed information about the latest 35 communications can be printed by Service Code 882 Remote printing function for the journal reports JOURNAL and JOURNAL 3 is also available for service technicians Refer to REMOTE PROGRAMMING P 49 The JOURNAL report only gives you basic information about a communication but the JOURNAL 3 report p...

Page 84: ...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 detected...

Page 85: ...tect with the naked eye are common particularly for an ASIC and RA Resistor Array But if you have an oscilloscope you can easily determine the problem site or IC malfunction by checking the main signal lines Even if you don t have such a measuring instrument by checking each main signal line and resoldering it in many cases the problem will be resolved An explanation of the main signals for bootin...

Page 86: ... 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 7 5 8 1 DIGITAL BLOCK DIAGRAM 86 KX FT902LS B KX FT904LS B ...

Page 87: ...87 KX FT902LS B KX FT904LS B ...

Page 88: ... timing of these signals is even slightly delayed the circuit will not work Nor will it if the IC is defective and the output voltage level is not normal although the timing of these signals is accurate enough to meet the specifications Make sure that your oscilloscope is calibrated before starting a test Therefore it is imperative to confirm whether each IC outputs the signal at the correct level...

Page 89: ...Note Simply check the output level and make sure if the IC repeatedly outputs the signal at between 3 3V H and 0V L I O and Pin No Diagram 89 KX FT902LS B KX FT904LS B ...

Page 90: ...90 KX FT902LS B KX FT904LS B ...

Page 91: ... 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 CROSS REFERENCE NG EXAMPLE P 93 CHECK THE STATUS OF THE DIGITAL BOARD P 94 91 KX FT902LS B KX FT904LS B ...

Page 92: ...7 5 8 2 FLASH MEMORY IC6 FT904 ONLY If the unit is working correctly but the TAM fanction can not work you should check the Flash Memory 92 KX FT902LS B KX FT904LS B ...

Page 93: ...7 5 8 3 NG EXAMPLE 93 KX FT902LS B KX FT904LS B ...

Page 94: ...7 5 8 4 CHECK THE STATUS OF THE DIGITAL BOARD First please check voltages and oscillation whether they are correct as follows 94 KX FT902LS B KX FT904LS B ...

Page 95: ...95 KX FT902LS B KX FT904LS B ...

Page 96: ... 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 P 96 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 7 5 9 1 CHECK SHEET Note Inside the digital board Inside the operation bo...

Page 97: ...Note Inside the digital board Inside the operation board 97 KX FT902LS B KX FT904LS B ...

Page 98: ...7 5 9 2 DEFECTIVE ITS INTEGRATED TELEPHONE SYSTEM SECTION 98 KX FT902LS B KX FT904LS B ...

Page 99: ...tanding 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 secondar...

Page 100: ...2 Troubleshooting Flow Chart 100 KX FT902LS B KX FT904LS B ...

Page 101: ... 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 R128 R109 D106 and IC101 You should change all of the parts listed as follows F101 Q101 R128 R109 D106 IC101 D201 If D201 is broken the oscillation circuit in the power supply cannot operate Check it with an el...

Page 102: ...7 5 11 OPERATION BOARD SECTION 7 5 11 1 NO KEY OPERATION CROSS REFERENCE TEST FUNCTIONS P 47 7 5 11 2 NO LCD INDICATION CROSS REFERENCE TEST FUNCTIONS P 47 102 KX FT902LS B KX FT904LS B ...

Page 103: ...12 SENSOR SECTION Refer to 6 5 SENSORS AND SWITCHES for the circuit descriptions 7 5 12 1 CHECK THE DOCUMENT SENSOR PS1 CHECK DOCUMENT 7 5 12 2 CHECK THE READ POSITION SW44 REMOVE DOCUMENT 7 5 13 READ SECTION Refer to SCANNING BLOCK P 120 103 KX FT902LS B KX FT904LS B ...

Page 104: ...CROSS REFERENCE TEST FUNCTIONS P 47 104 KX FT902LS B KX FT904LS B ...

Page 105: ...7 5 14 THERMAL HEAD SECTION Refer to THERMAL HEAD P 118 CROSS REFERENCE SUPERVISION CIRCUIT FOR THE THERMAL HEAD TEMPERATURE P 115 THERMAL HEAD P 118 105 KX FT902LS B KX FT904LS B ...

Page 106: ...8 CIRCUIT OPERATIONS 8 1 CONNECTION DIAGRAM 106 KX FT902LS B KX FT904LS B ...

Page 107: ...nstructions for unit operations 3 Static RAM IC4 This memory is used mainly for the 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 IC7 Drives the motor 8 Analog board Composed of an ITS circuit and NCU circuit 9 Sensor Section Co...

Page 108: ...8 2 1 GENERAL BLOCK DIAGRAM 108 KX FT902LS B KX FT904LS B ...

Page 109: ...RINTER CONTROL RTC TONE ASIC IC1 VOL A D IMAGE PROCESSING MOTOR I F MOTOR DRIVER IC7 RESET IC3 TO MOTOR T2 T5 256kbit ROM OP PANEL I F OSC 24MHz CPU 24V 24V 5V XRESETI XWDERR D0 7 A0 17 WR RD TO CIS TO THERMAL HEAD STB1 2 3 THLAT THCLK THDAT ANALOG SW Q11 FET LED ON CLK SIG THON 32 768kHz Q7 CIS ON KX FT902 904LS B DIGITAL BOARD BLOCK DIAGRAM SP AMP IC12 CN9 WR RD A0 14 D0 D7 IC6 FRASH 4M bit KX F...

Page 110: ...E DESCRIPTION 1 VSSA GND POWER SOURCE ANALOG GND 2 VDDA 3 3 3 3V POWER SOURCE ANALOG 3 3V 3 AIN1 A 3 3V CIS IMAGE SIGNAL INPUT SIG 4 AIN2 A 3 3V THERMISTOR TEMPERATURE WATCH INPUT 5 AIN3 A 3 3V LINE VOLTAGE DETECTION SIGNAL INPUT DCIN 6 AMON A 3 3V ANALOG SIGNAL MONITOR TERMINAL 7 VSS GND POWER SOURCE GND 8 X32OUT O 3 3V BATT RTC 32 768KHz CONNECTION 9 X32IN I 3 3V BATT RTC 32 768KHz CONNECTION 10...

Page 111: ...D 58 TEST3 I 3 3V HIGH FIXED 59 TEST4 I 3 3V HIGH FIXED 60 XMDMINT I 3 3V MODEM INTERRUPT 61 XMDMCS O 3 3V MODEM CHIP SELECT 62 XRAS IOP I O 3 3V PORT SPMUTE 63 XCAS1 IOP I 3 3V INPUT PORT PAPER 64 XCAS2 IOP I 3 3V INPUT PORT PDWN 65 XRESCS2 O 3 3V FLASH CHIP SELECT XRESCS2 66 DB3 I O 3 3V CPU DATA BUS 3 67 DB2 I O 3 3V CPU DATA BUS 2 68 DB4 I O 3 3V CPU DATA BUS 4 69 DB1 I O 3 3V CPU DATA BUS 1 7...

Page 112: ...XTHCLK 118 THLAT O 3 3V PULSE OUTPUT FOR DATA LATCH XTHLAT 119 STBNP I 3 3V INPUT PORT MOT POS 120 RM0 IOP O 3 3V MOTOR A PHASE 121 RM1 IOP O 3 3V MOTOR B PHASE 122 RM2 IOP O 3 3V MOTOR A PHASE 123 RM3 IOP O 3 3V MOTOR B PHASE 124 RXE IOP O 3 3V MOTOR ENABLE 125 TMO O 3 3V OUTPUT PORT THON 126 VDD 2 5V POWER SOURCE 2 5V 127 VSS GND POWER SOURCE GND 128 TM1 IOP O 3 3V OUTPUT PORT NC 129 TM2 IOP O 3...

Page 113: ...and addresses A000H to CFFFH are for the bank area 8 3 5 RESET CIRCUIT WATCH DOG TIMER The output signal reset from pin 4 of the voltage detect IC IC3 is input to the ASIC IC1 114 pin 1 During a momentary power interruption a negative reset pulse of 50 70 msec is generated and the system is reset completely 2 The watch dog timer built in the ASIC IC1 is initialized by the CPU about every 1 5 ms Wh...

Page 114: ...er is turned ON power is supplied to RAM IC4 and RTC IC1 At this time the voltage at pin 32 of RAM and pin 14 of RTC IC1 is 3 3V When the power is turned OFF the battery supplies the power to RAM and RTC through J1 R48 D3 At that time the voltage at pin 32 of RAM and pin 14 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 input to pin 11...

Page 115: ... 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 the print...

Page 116: ...ata 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 85 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 ...

Page 117: ...8 4 2 BLOCK DIAGRAM 117 KX FT902LS B KX FT904LS B ...

Page 118: ...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 103 105 only black dot locations 1 among latched data activates the driver and the current passes to heat the emitting body causing hea...

Page 119: ...119 KX FT902LS B KX FT904LS B ...

Page 120: ...e transistor Q7 turns on This applies voltage to the LED array to light it and the voltage 3 3V of CIS turns on 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 AIN1 pin 3 of IC1 and convert...

Page 121: ...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 Photo 1 2 432 pps Super Fine 1 2 216 pps FAX STD 2 432 pps Fine Photo 1 2 432 pps Super Fine 1 2 216 pps Paper F...

Page 122: ...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 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 122 KX FT902LS B KX FT904LS B ...

Page 123: ...re 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 8 4 6 3 MECHANICAL MOVEMENTS IN THE MAIN OPERATIONS ...

Page 124: ...8 4 6 3 2 SCANNING CROSS REFERENCE SENSOR SECTION P 103 8 4 6 3 3 PRINTING Note SENSORS AND SWITCHES P 126 124 KX FT902LS B KX FT904LS B ...

Page 125: ...8 4 6 3 4 COPYING CROSS REFERENCE SENSOR SECTION P 103 125 KX FT902LS B KX FT904LS B ...

Page 126: ...me Message Error DIGITAL CN5 Motor Position CALL SERVICE 2 CN6 FT926 only Cutter Position PAPER JAMED ANALOG SW1 Cover Open and Paper set CHECK COVER and OUT OF PAPER SW2 Hook SW SW3 JAM set PAPER JAMED Operation Panel SW44 Document Read Position REMOVE DOCUMENT PS1 Document set CHECK DOCUMENT 126 KX FT902LS B KX FT904LS B ...

Page 127: ... IC1 131 Pin Home position Low level Other High level 8 5 3 RECORDING PAPER SENSOR SW1 When there is no recording paper the plate is separated from the switch lever and the switch turns off Pin 63 of IC1 becomes a high level When there is recording paper the plate pushes the switch lever and the switch turns ON Pin 63 of IC1 becomes a low level Analog Board Signal CN1 63 Pin Paper Low level No pap...

Page 128: ... 8 5 5 JAM SENSOR SW3 The JAM sensor is a detection switch for determining whether the recording paper edge is in the correct position or not If the recording paper cannot be detected correctly at the JAM sensor position even when recording paper is present then JAM is displayed If the recording paper is at the sensor position then the switch turns on the IC1 21pin switches to a high level Analog ...

Page 129: ...ition Low level 8 5 7 DOCUMENT SET 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 IC1 15 pin Operation becomes a high level When there is no document the shelter plate passes the sensor light the photo transistor becomes ON and the input signal of the IC1 15 pin Operation becomes a low level When checking thi...

Page 130: ... International Telecommunications Uniib ITU investigates and make recommendations on international standards for facsimiles 2 Definition of Each Group Group I G1 A 4 size documents without using formats which reduce the band width of a signal sent over telephone lines Determined in 1968 Transmission for about 6 minutes at scanning line density of 3 85 lines mm Group II G2 Using reduction technolog...

Page 131: ...ists of the following Control time This is time at the start of transmission when the functions at the sending and receiving sides are confirmed the transmission mode is established and transmission and reception are synchronized Image transmission time This is the time required for the transmission of document contents image data In general this time is recorded in the catalog etc Hold time This ...

Page 132: ...0 bps FSK are 1850 Hz 0 1650Hz 1 An example of the binary process in G3 communication is shown below Explanation of Signals Control signals are comprised mainly of 8 bit identification signals and of the data signals added to them Data signals are added to DIS and DCS signals Signal DIS Digital Identification Signal Identification Signal Format 00000001 Function Notifies the capacity of the receiv...

Page 133: ...ength of 303 mm 1 2048 picture elements along scan line length of 255 mm 1 Invalid 19 20 0 0 0 1 1 0 1 1 Maximum recording length capability A4 297 mm Unlimited A4 297 mm and B4 364 mm Invalid Maximum recording length A4 297 mm Unlimited B4 364 mm Invalid Signal DCS Digital Command Signal Identification Signal Format X1000001 Function Notifies the capacity of the receiving machine obtained at DIS ...

Page 134: ...eiving side at a speed 2400 to 9600 bps designated by DCS and the receiving side optimizes the automatic equalizer etc according to this signal TCF Training Check Sends 0 continuously for 1 5 seconds at the same speed as the training signal CFR Confirmation to Receive X0100001 Notifies the sending side that TCF has been properly received If TCF is not properly received FTT Failure To Train X010001...

Page 135: ...b Redundancy Compression Process Coding Mode This unit uses one dimensional MH format 135 KX FT902LS B KX FT904LS B ...

Page 136: ...HECK SHEET P 96 2 Facsimile Reception The analog image data 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 o...

Page 137: ...OOK 5VD H S RX ENB MDM TX ENB TONE1 ENB Analog Digital LINE RX TONE1 VOLOUT ASIC IC1 VOLIN SPKRM SPKRP LINEOUT SIA IC5 2 0V MIC CN3 SP CN9 SP H S SP MIC IC2 IC10 Ref LINEIN MICM MICP 5VA 5V Q1 OP PANEL MIC 24V 12V 24V Ref SPKRM SPKRP LINEOUT PIA MICREF LINEIN MICM MICP 12V IC3 Line CN4 BELL JAM JAM 5VD H S TX MUTE 2V RLY KX FT902 904LS B ANALOG BOARD BLOCK DIAGRAM EXT TEL CN5 T3 137 KX FT902LS B K...

Page 138: ...switches to the external telephone side Break and switches to the open side make when the unit starts facsimile communication IC1 130 High Level CN2 7 CN1 7 Q10 ON RLY1 make 8 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 23 of ASIC IC1 on the digital board is read TEL LINE PC2 1 2 4 CN1 11 CN2 11 IC...

Page 139: ...in 2 The transmission signal is input from CN1 pin 5 and output to the TEL line through C29 R29 R28 and T1 Without a side tone circuit the transmission signal would return to the reception amplifier via C29 and R28 Here the signal output from CN1 pin 5 passes through C29 R24 and R23 and enters the amplifier IC3 pin 3 This is used to cancel the return portion of the transmission signal This is the ...

Page 140: ...o and from the handset 2 Signal path Refer to CHECK SHEET P 96 8 9 3 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 CHECK SHEET P 96 8 10 ATAS AUTOMATIC TELEPHONE ANSWERING SYSTEM SECTION 8 10 1 REMOTE RECEIVING 1 Function This is the parallel connection DTMF signal for the...

Page 141: ...8 10 2 CIRCUIT DIAGRAM 141 KX FT902LS B KX FT904LS B ...

Page 142: ...1 and ASIC IC1 on the DIGITAL BOARD The key matrix table is shown below IC1 ASIC DIGITAL BOARD OPERATION BOARD READ POSITION SENSOR DOCUMENT SENSOR CN7 CN1 Chip on board type GATE ARRAY IC1 CN2 7X5 KEYS MATRIX LED KSL0 4 XLED13 14 SW41 SW42 XLED11 12 XLED 15 LCD LED5 KIN0 KIN2 7 KX FT902 904LS B OPERATION BOARD BLOCK DIAGRAM 142 KX FT902LS B KX FT904LS B ...

Page 143: ...data bus D4 D7 V0 is supplied for the crystal drive R13 and R14 are density control resistors Consequently in this unit the timing positive clock is generated by the LCD interface circuitry in the gate array IC1 Density Normal Dark LED1 IC1 22pin H L 143 KX FT902LS B KX FT904LS B ...

Page 144: ...e Wave Form C D Voltage Wave Form E F G H Voltage Wave Form 0 0 0 Block Diagram Input Circuit The input current goes into the input rectifier circuit through the filter circuit The filter circuit decreases the noise voltage and the noise electric field strength 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 ...

Page 145: ...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 is stabiliz...

Page 146: ...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 detecting ...

Page 147: ...9 REFERENCE MATERIAL DATA 9 1 TERMINAL GUIDE OF THE ICs TRANSISTORS AND DIODES 147 KX FT902LS B KX FT904LS B ...

Page 148: ...See ABOUT LEAD FREE SOLDER PbF Pb free P 5 9 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 9 2 1 PREPARATION 9 2 2 FLAT PACKAGE IC REMOVAL PROCEDURE 1 Put plenty of solder on the IC pins so that...

Page 149: ...the corresponding soldering foil 2 Apply flux to all pins of the FLAT PACKAGE IC 3 Solder the pins sliding the soldering iron in the direction of the arrow 9 2 4 BRIDGE MODIFICATION PROCEDURE 1 Lightly resolder the bridged portion 2 Remove the remaining solder along the pins using a soldering iron as shown in the figure below 149 KX FT902LS B KX FT904LS B ...

Page 150: ...9 3 TEST CHART 9 3 1 ITU T No 1 TEST CHART 150 KX FT902LS B KX FT904LS B ...

Page 151: ...9 3 2 ITU T No 2 TEST CHART 151 KX FT902LS B KX FT904LS B ...

Page 152: ...10 FIXTURES AND TOOLS 152 KX FT902LS B KX FT904LS B ...

Page 153: ...11 CABINET MECHANICAL 11 1 OPERATION PANEL SECTION 153 KX FT902LS B KX FT904LS B ...

Page 154: ...11 2 UPPER CABINET SECTION 154 KX FT902LS B KX FT904LS B ...

Page 155: ...11 3 LOWER CABINET CROSS REFERENCE MOTOR SECTION P 156 155 KX FT902LS B KX FT904LS B ...

Page 156: ...11 4 MOTOR SECTION 11 4 1 KX FT902LS B 156 KX FT902LS B KX FT904LS B ...

Page 157: ...11 4 2 KX FT904LS B 157 KX FT902LS B KX FT904LS B ...

Page 158: ...11 5 ACTUAL SIZE OF SCREWS 158 KX FT902LS B KX FT904LS B ...

Page 159: ...12 ACCESSORIES AND PACKING MATERIALS 159 KX FT902LS B KX FT904LS B ...

Page 160: ...HB 12 PFHX1743Z READING SHEET 13 PFHG1064Z SEPARATION RUBBER 14 PFUS1523Z SPRING DOCUMEN FEED 15 PFDG1170Z GEAR PLATEN POM HB 16 PFDN1044Z ROLLER PLATEN 17 PFUS1286Z SPRING OPERATION EARTH 18 PFJE1050Z LEAD WIRE 19 Not Used 20 Not Used 21 Not Used 22 PFDG1015Y GEAR DOCUMENT GUIDE POM HB 23 PFUS1222Z SPRING 24 PFKR1074Z1 DOCUMENT GUIDE R ABS HB 25 PFKR1073Z1 DOCUMENT GUIDE L ABS HB 26 PFUS1170Z SPR...

Page 161: ... POM HB 154 PFDG1172Z GEAR BASE POM HB 155 PFHR1217Z ARM RX POM HB 156 Not Used KX FT902LS B 156 PFHR1213Z ARM CUTTER KX FT904LS B POM HB 157 PFDG1171Z GEAR SENDING POM HB 158 PFDG1169Z GEAR IDLER SENDING POM HB 159 PFHR1436Y COVER GEAR CHASSIS Ref No Part No Part Name Description Remarks 160 PFDG1362Z GEAR D KX FT902LS B POM HB 13 1 5 ACCESSORIES AND PACKING MATERIALS Ref No Part No Part Name Des...

Page 162: ...1 100 R28 ERJ3GEYJ472 4 7K R29 ERJ3GEYJ223 22K R30 ERJ3GEYJ433 43K Ref No Part No Part Name Description Remarks R31 ERJ3GEYJ4R7 4 7 R32 ERJ3GEYJ222 2 2K R33 ERJ3GEYJ203 20K R35 ERJ3GEYJ472 4 7K R36 ERJ3GEYJ333 33K R38 ERJ3GEYJ101 100 R39 ERJ3GEYJ101 100 R40 ERJ3EKF1101 1 1K R41 ERJ3EKF3602 36 R42 ERJ3GEYJ101 100 R43 ERJ3GEYJ101 100 R44 ERJ3GEYJ101 100 R46 ERJ3GEYJ334 330K R47 ERJ3GEYJ475 4 7M R48 ...

Page 163: ... ECUV1H102KBV 0 001 C113 ECEA1CKA100 10 S C115 ECUV1C104KBV 0 1 C116 ECUV1H331JCV 330P S Ref No Part No Part Name Description Remarks C120 ECUV1E104ZFV 0 1 C123 ECEA1HKA4R7 4 7 S C126 ECUV1H102KBV 0 001 C127 ECUV1C104KBV 0 1 C129 ECUV1C104KBV 0 1 13 2 2 KX FT904LS B Ref No Part No Part Name Description Remarks PCB1 PFWP1FT904LS DIGITAL BOARD ASS Y RTL PCB1 1 PFLP1572CXZ DIGITAL BOARD ASS Y without...

Page 164: ... R51 ERJ3GEYJ471 470 R52 ERJ3GEYJ101 100 R54 ERJ3GEYJ101 100 Ref No Part No Part Name Description Remarks R57 ERJ3GEYJ102 1K R58 ERJ3GEY0R00 0 R59 ERJ3GEYJ470 47 R61 ERJ3GEYJ105 1M R62 ERJ3GEYJ104 100K R63 ERJ3GEYJ103 10K R64 ERJ3GEY0R00 0 R65 ERJ3GEYJ101 100 R66 ERJ3GEYJ101 100 R67 ERG2SJ391 390 R68 ERJ3GEYJ222 2 2K R69 ERJ3GEYJ473 47K R70 ERJ3GEY0R00 0 R74 ERJ3GEYJ103 10K R76 ERJ3GEYJ103 10K R77...

Page 165: ...SZ ANALOG BOARD RTL ICs IC2 PFVINJM2904M IC S IC3 PQVINJM4558M IC S TRANSISTORS Q1 2SC4155S TRANSISTOR SI S Ref No Part No Part Name Description Remarks Q2 PQVTDTC114EU TRANSISTOR SI S Q3 PQVTDTC114EU TRANSISTOR SI S Q4 2SB1218ARL TRANSISTOR SI Q6 PQVTDTC114EU TRANSISTOR SI S Q7 PQVTDTC114EU TRANSISTOR SI S Q8 2SC2235 TRANSISTOR SI S Q9 2SC4155R TRANSISTOR SI S Q10 PQVTDTC143E TRANSISTOR SI S Q11 ...

Page 166: ...J3GEYJ152 1 5K R71 ERJ3GEYJ152 1 5K R73 ERJ3GEYJ102 1K R79 ERJ3GEY0R00 0 R80 ERJ3GEYJ103 10K R82 ERJ3GEYJ183 18K Ref No Part No Part Name Description Remarks R83 ERDS1TJ184 180K R84 ERJ3GEYJ105 1M CAPACITORS C1 ECUV1H103KBV 0 01 C2 ECUV1H103KBV 0 01 C4 ECEA1HKA4R7 4 7 S C5 ECUV1H103KBV 0 01 C6 ECEA0JKA470 47 S C7 ECUV1E104ZFV 0 1 C8 ECUV1H181JCV 180P S C9 ECUV1H181JCV 180P S C11 ECUV1C393KBV 0 039...

Page 167: ... C7 ECUV1H331JCV 330P S C8 ECUV1H121JCV 120P C9 ECUV1H331JCV 330P S C14 ECUV1H103KBV 0 01 C15 ECUV1E104ZFV 0 1 C16 ECUV1E104ZFV 0 1 C18 ECUV1C224ZFV 0 22 S C19 ECUV1H103KBV 0 01 C22 ECUV1H103KBV 0 01 C23 ECUV1H103KBV 0 01 13 5 POWER SUPPLY BOARD PARTS Ref No Part No Part Name Description Remarks PCB4 N0AC2GJ00004 POWER SUPPLY BOARD ASS Y RTL ICs IC101 PFVIFA5511P IC IC201 AN1431T IC IC202 AN7805F ...

Page 168: ...124 ECUV1A474KBV 0 47 S C125 ECUV1H471JCV 470p C126 ECUV1H104KCV 0 1 C201 PFCEA35F471 470 S C202 ECKN3A102KBP 0 001 C203 PFCEA16A470 470 S C204 PFCEA35A47M 47 S C205 PFCEA50A1M 1 S 13 6 FIXTURES AND TOOLS Ref No Part No Part Name Description Remarks EC1 PQZZ7K5Z CONNECTOR 7P EC2 PFZZ16K5Z CONNECTOR 16P EC3 PQZZ2K1Z CONNECTOR 2P EC4 PFZZ5K13Z CONNECTOR 5P EC5 PFZZ12K4Z CONNECTOR 12P EC6 PQZZ2K12Z C...

Page 169: ... 1 16 R113 IC4 IC1 C24 C25 C46 R51 R55 C36 R40 CLK FTG R65 R62 R76 C123 R107 C96 EYEXY EYESYNC 3 3V BATIN EYECLK R67 R66 R74 C57 R72 R64 R48 R104 C106 C105 C60 R121 5VA C104 C101 R108 R109 R105 R106 R96 R95 R94 R90 C91 C94 C95 C122 2 1 R119 C92 R99 R103 L12 7 CN8 D3 C110 C109 C125 1 R60 C53 C55 DG R41 R58 R56 C40 R45 R47 R46 C32 R54 C56 R63 SIG R115 R28 1 36 37 72 73 108 TEST X1 RA9 C97 C89 R98 16...

Page 170: ...C129 C83 C77 L20 C16 C34 R36 C120 R17 R15 R14 R13 R12 R102 C98 R110 R91 C111 C90 C88 R100 C93 C71 C63 C43 C48 C41 C31 C28 C17 R5 R1 R3 C1 C7 C5 R6 C114 C27 C45 C42 R4 R2 C3 R8 R57 R43 C29 L2 R9 C54 C86 C74 C117 C76 R85 R111 R116 R117 R122 R123 C124 R120 C127 C126 R118 C121 8 5 1 4 IC12 C112 R112 R101 C85 C81 C107 C108 PFUP1393Z MODEM3 3V 3 3V BATIN 2 5V BATIN 2 5V 3 3V XTEST RESET PbF KX FT902LS B...

Page 171: ... J2 J6 J10 J14 J11 J12 CN1 1 16 J5 J9 J19 FLT3 1 4 8 5 J7 J8 J16 PFUP1394Z UT J15 J31 J17 J18 J33 J29 J32 AUTO CH R83 D5 D4 R57 R85 R47 J21 J20 C30 C39 C10 C6 SW2 C62 CN3 C55 C58 C29 C15 C4 SW1 CN4 CN5 C48 T3 C50 C49 D12 D13 D6 D1 D15 D3 D14 D2 R43 E Q8 PC2 PC3 PC1 R28 R29 R68 PCB CH KX FT902 904LS B ANALOG BOARD COMPONENT VIEW KX FT902LS B KX FT904LS B 171 ...

Page 172: ...60 C74 R61 C43 4 1 8 5 R64 R56 C46 L15 R66 R65 C45 R49 C38 R45 C34 R37 R39 L13 L18 L12 C37 L10 C52 R63 R36 R35 R40 R46 C51 C40 R58 R34 R55 L24 C65 C26 R30 R32 R22 L1 C1 R5 R81 R38 C57 R79 L23 L30 L31 L28 L29 L11 C32 C41 L17 C63 L22 L25 R71 C61 C53 R54 R73 IC2 R51 R70 R27 C5 R7 R12 R67 DA1 R82 R80 L26 L27 R48 R14 C56 L32 L33 D16 PFUP1394Z UT PbF L21 L19 E Q4 E Q2 E Q5 E Q3 E Q6 E Q7 E Q9 16 1 PC2 D...

Page 173: ... J11 J12 J2 J16 J5 1 12 CN1 J15 J3 J4 J13 J14 No 1 No 12 SW10 No 2 No 13 SW20 No 3 No 14 SW6 No 4 No 15 SW16 No 5 No 16 SW15 No 6 No 17 SW39 No 9 No 20 SW9 No 8 No 19 SW7 No 7 No 18 ONE TOUCH DIAL STATION KEY CN2 1 10 SW8 SW42 LED1 No 10 RECEIVE MODE SW41 CALLER ID SW2 STOP SW5 C13 FAX START SET SW3 COPY PS1 No 21 SW37 No 11 No 22 SW1 LOWER SW19 UP VOL SW14 PREV SW38 NEXT SW4 DOWN VOL NAVIGATOR SW...

Page 174: ...24 R48 R46 C20 IC1 23 22 12 11 1 44 34 33 C7 C9 C6 R45 R44 C3 GND R47 C8 R53 FG R3 C12 C11 R5 C10 R4 Q1 E BLACK MIC MIC R6 R7 R8 C16 C19 R17 C15 C23 R51 R52 R13 R15 R14 C17 R12 R10 R9 C14 SW44 C18 R25 R50 5V AG RED 1 2 3 4 5 6 7 8 9 A B C D E F G H I PbF PFUP1395Z UT KX FT902LS B KX FT904LS B 174 ...

Page 175: ...INUED PROTECTION AGAINST RISK OF FIRE REPLACE KX FT902 904LS B POWER SUPPLY BOARD COMPONENT VIEW 14 4 2 POWER SUPPLY BOARD BOTTOM VIEW PRIMARY SECONDARY T3 15AH 250V 68 4839 F101 D104 D103 D102 D101 J1 J2 J3 J4 C202 R224 D201 C102 C108 R104 R107 R109 R106 L103 D108 T101 C119 C221 C201 24 7 CN301 1 5V GND GND R203 R202 C203 C106 D105 C123 C125 C124 R127 R126 C121 R124 C105 R137 R103 R105 R128 R122 ...

Page 176: ...S 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 176 KX FT902LS B KX FT904LS B ...

Page 177: ...16 MEMO 177 KX FT902LS B KX FT904LS B ...

Page 178: ...8 92 ADR9 93 ADR10 94 ADR11 95 ADR12 96 RBA0 97 RBA1 98 RBA2 99 RBA3 100 RBA4 101 RBA5 OP 102 RBA6 IOP96 103 STB1 104 STB2 105 STB3 106 XRESET 107 VDD3 3V 108 VSS 109 VSS 110 VDD3 3V 111 XDRESET 112 VDD5 0V 113 VSS 114 XRESETI 115 XWDERR 116 THDAT 117 THCLK 118 THLAT 119 STBNP 120 RM0 IOP00 121 RM1 IOP01 122 RM2 IOP02 123 RM3 IOP03 124 RXE IP04 125 TM0 IOP10 126 VDD2 5V 127 VSS 128 TM1 IOP11 129 T...

Page 179: ...6 IA1CLK 27 CTRLSIN_S NC 28 RESERVED NC 29 SOUT_S NC 30 SIN_S NC 31 FSYNC_S NC 32 IARESET_S NC 33 AGND1 34 LINEIN_S NC 35 MICP_S NC 36 MICM_S NC 37 MICBIAS_S NC 38 NC 39 NC 40 VREF_S NC 41 VC_S NC 42 VAA_S NC 43 LINEOUT_S NC 44 NC 45 AGND2 46 SPKRP_S NC 47 SPKRM_S NC 48 AVDD_S NC 49 RESERVED NC 50 ICLK_S NC 51 MCLK_P 52 CTRLSIN_P 53 RESERVED 54 SOUT_P 55 SIN_P 56 FSYNC_P 57 IARESET_P 58 AGND3 59 N...

Page 180: ...HEAD TO MOTOR MOTOR BLOCK THERMAL HEAD BLOCK R27 R24 R25 R26 R51 470 Z0 1u C29 XRESET R29 22K Z0 1u C44 R52 100 C28 Z0 1u RA1 100 1 2 3 4 5 6 7 8 C37 NC C22 RA4 100 1 2 3 4 5 6 7 8 X1 32 768KHz BR3 R37 C35 J15p Z0 1u C20 C25 Z0 1u XNMI Z0 1u C41 C33 K0 1u R30 43K 3 3VD C26 K2200p C39 J12p Z0 1u C17 R35 4 7K C19 J100p C18 Z0 1u R33 20K 5VD 2 5V C30 K0 1u RA3 100 1 2 3 4 5 6 7 8 Z0 1u C31 3 3VA C38 ...

Page 181: ...CLK EN85 GPI0 RTS DGND1 TXD SA1CLK RS4 RS3 RS2 RS1 RS0 YCLK IACLK IA1CLK CTRLSIN_S NC RESERVED NC SOUT_S NC SIN_S NC FSYNC_S NC IARESET_S NC AGND1 LINEIN_S NC MICP_S NC MICM_S NC MICBIAS_S NC NC NC VREF_S NC VC_S NC VAA_S NC LINEOUT_S NC NC AGND2 SPKRP_S NC SPKRM_S NC AVDD_S NC RESERVED NC ICLK_S NC MCLK_P CTRLSIN_P RESERVED SOUT_P SIN_P FSYNC_P IARESET_P AGND3 NC LINEIN_P MICP_P MICM_P MICBIAS_P ...

Page 182: ... 15K R30 R33 10K R2 10K R12 4 7K R3 100 R27 10K R8 10K 39K R22 R24 330 R21 220K R4 4 7K R15 3 3K 0 R5 R37 8 2K R40 0 R31 1 5K R11 100K R26 10K R7 100 R46 7 5K R9 6 2K 470K R25 R28 270 1 4W R20 220K R29 33 1 4W R23 2 7K 43K R16 R14 2 7K R35 NC R6 4 7K R38 91K R1 100 R18 75K R13 75K R10 100K 6 8K R34 91K R17 6 8K R32 D3 5 6V D2 5 6V D1 4 7V Q1 Q6 Q2 Q3 Q5 NC Q7 Q4 SW2 1 2 3 4 T1 300 600 1 2 3 4 6 T2...

Page 183: ...AD L22 BEAD L13 0 L33 BEAD L31 0 L25 BEAD L23 BEAD L21 NC L14 0 L17 0 L18 0 L27 BEAD JJ2 0 JJ3 0 R57 15K 1 2W R70 1 5K 22 R66 R67 2 2K 24K R61 R47 NC R55 330 R59 NC R63 18K R44 6 2K R51 2 2K R54 680K R56 220K R64 18K 22K R36 R43 33 R65 47K R39 12K 2 2K R45 R48 6 8K R71 1 5K 390K R49 1K R73 R53 12K R68 0 D12 D6 NC D14 D13 D7 1 2 3 4 D4 5 6V D5 5 6V W5NL5T F1 0 POS1 SA2 3000V SA1 300V 310V ZNR1 120V...

Page 184: ...WN VOL SW5 FAX START SET SW6 No 4 No 15 SW7 No 7 No 18 SW8 No 10 No 21 SW9 No 8 No 19 SW10 No 2 No 13 SW11 RECORD NC SW12 PLAY NC SW13 MENU SW14 PREV SW15 No 6 No 17 SW16 No 5 No 16 SW17 ERASE NC SW18 SP PHONE MONITOR SW19 UP VOL SW20 No 3 No 14 SW21 8 SW22 5 SW23 REDIAL PAUSE SW24 2 SW25 0 SW26 9 SW27 6 SW28 MUTE SW29 3 SW30 SW31 7 SW32 4 SW33 FLASH SW34 1 SW35 SW36 No 1 No 12 SW37 No 11 No 22 SW...

Page 185: ...D R127 PC101 C124 0 47 10 1 8K C101 0 22 F101 T3 15A 250V D101 R105 0 22 2 C121 4700p C125 470p 4 5 3 6 2 7 1 8 R122 270 D107 R125 IC101 D108 R108 15 IC202 R128 100 D106 Q101 G R104 R107 150K 2 T101 TRANS D201 1 24V 2 24V 3 24V 4 GND CN301 5 GND 6 GND 7 5V C202 1000p 1K D202 C206 C110 C221 2200p R223 IC201 C205 1 50 100 D S R203 47 1 2 C204 47 35 TH101 R124 180 C126 0 1 50 Cycle 15 4 µs 55V 25V 0V...

Page 186: ...186 KX FT902LS B KX FT904LS B K N KXFT902LSB KXFT904LSB ...

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