Panasonic KX-FT72BR-G Service Manual Download | Manualshive

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5.9. ITS (Integrated telephone System) and MONITOR SECTION

5.9.1. GENERAL

During the monitor operation, the speaker output passes through the power amplifier (IC1) [Analog board].
The DTMF signal is output from the modem (IC1: digital board). The alarm tone, the key tone, bell tone, and beep are output from
gate array IC1 (digital board). During a pulse dial operation, the monitor tone is output from gate array IC1.

5.9.2. MONITOR CIRCUIT

1. Function

This is the function when you are not holding the handset and can hear the caller´s voice from the line.

2. Circuit Operation

(Monitor Signal Path)

Signals received from the telephone line are output through at the speaker via the following path.

Refer to CHECK SHEET (P.65)

5.9.3.

HANDSET CIRCUIT

1. Transmission signal

Refer to 2.3.4.4. Analog Board Section

2. Reception Signal

Refer to CHECK SHEET (P.65)

5.9.4. MONITOR CIRCUIT

1. DTMF Monitor

(Monitor)

Refer to CHECK SHEET (P.65)

(Handset)

2. Alarm/Beep/Key tone/Bell

Refer to CHECK SHEET (P.65)

3. Dummy Ring Back Tone

Same with the modem signal transmission.

5.10. EXT. TEL

EXT. TEL JACK is provided for the external TEL connection.
Connect the telephone to the EXT. TEL JACK. Because the unit has the priority, EXT. TEL is disconnected when the unit is OFF-
HOOK.

1. EXT. TEL DC LOOP

(Signal Path)
T

→

CN4(3)

→

POS1

→

L2

→

RL1(3-5)

→

L3

→

CN5(4)

→

EXT.TEL

→

CN5(3)

→

L4

→

R14

→

L1

→

CN4(4)

→

R

2. REMOTE RECEIVING

This is the parallel connection DTMF signal for the TEL or EXT. TEL mode between T and R. When the other party is a FAX,
the unit changes to FAX receiving.

(Signal path)

Refer to CHECK SHEET (P.65)

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Summary of Contents for KX-FT72BR-G

Page 1: ... 2001 Kyushu Matsushita Electric Co Ltd All rights reserved Unauthorized copying and distribution is a violation of law KX FT72BR G for Brazil Personal FAX ORDER NO KMF0112524C3 ...

Page 2: ...5 4 3 FLAT PACKAGE IC INSTALLATION PROCEDURE 96 4 4 BRIDGE MODIFICATION PROCEDURE 96 5 CIRCUIT OPERATIONS 97 5 1 CONNECTION DIAGRAM 97 5 2 GENERAL BLOCK DIAGRAM 98 5 3 CONTROL SECTION 100 5 4 FACSIMILE SECTION 108 5 5 SENSORS AND SWITCHES 118 5 6 MODEM SECTION 121 5 7 ANALOG UNIT BLOCK DIAGRAM 128 5 8 NCU SECTION 129 5 9 ITS Integrated telephone System and MONITOR SECTION 131 5 10 EXT TEL 131 5 11...

Page 3: ...1 1 LCD MESSAGE 1 INTRODUCTION 3 KX FT72BR G ...

Page 4: ...mer 1 4 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 foil 2 Ground the soldering irons 3 Use a conductive mat on the worktable 4 Do not touch the IC or LSI pins with bare fingers 1 5 BATTERY CAUTION CAUTION Danger of explosion if the battery ...

Page 5: ...SAFETY PRECAUTIONS 1 7 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 hand...

Page 6: ...Fine Copier Function Automatic Document Feeder 10 Sheets Help Printout Easy to view LCD 15 Characters Integrated Telephone System Electric Volume Control On hook dialing Redialing function Temporary tone dialing Electric Telephone directory 1 7 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 serv...

Page 7: ...4 5 8 13 5 16 9 11 16 Mass Weight Approx 2 5 kg 5 5 lb Power Consumption Standby Approx 5 5 W Transmission Approx 20 W When sending the ITU T No 1 Test Chart Reception Approx 33 W When receiving the ITU T No 1 Test Chart Copy Approx 30 W When copying the ITU T No 1 Test Chart Maximum Approx 120 W When copying a 100 black document Power Supply 120 V AC 60 Hz Transmission speed depends upon the cont...

Page 8: ...1 11 TEST CHART 1 11 1 ITU T NO 1 TEST CHART 8 KX FT72BR G ...

Page 9: ...1 11 2 CCITT NO 2 TEST CHART 9 KX FT72BR G ...

Page 10: ...1 12 LOCATION OF CONTROLS 1 12 1 OVERVIEW 10 KX FT72BR G ...

Page 11: ...tton the unit will automatically redial the number up to 5 times To insert a pause during dialing MUTE To mute your voice to the other party during a conversation Press this button again to resume the conversation MONITOR To dial without lifting the handset MENU To initiate or exit programming NAVIGATOR VOLUME To adjust volume To search for a stored name To select the features or feature settings ...

Page 12: ...ECTIONS 1 Connect the handset cord 2 Connect the telephone line cord 3 Connect the power cord NOTE When you operate this products the power outlet should be near the product and easily accessible 12 KX FT72BR G ...

Page 13: ...no slack in the paper roll 3 Close the cover securely by pushing down on both sides 4 Tear off the excess paper by pulling it towards you Note Only use the included roll of paper or specified recording paper or else the print quality may be affected and or excessive thermal head wear may occur To order recording paper see OPTIONAL ACCESSORY P 7 When the power cord is connected every time you close...

Page 14: ...pace and press 6 times 6 Press The next feature will be displayed 7 Press Note You can enter your logo by pressing or in step 4 In this case press to move the cursor To correct a mistake Press or to move the cursor to the incorrect character and make the correction 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 to ...

Page 15: ...ECT CHARACTERS USING or Instead of pressing the dial keys you can select characters using or 1 Press or until the desired character is displayed 2 Press to move the cursor to the next space The character displayed in step 1 is inserted 3 Return to step 1 to enter the next character Display order of characters 15 KX FT72BR G ...

Page 16: ... Press 9 If necessary enter the third emergency telephone number using the dial keypad If you do not need to enter skip to step 10 10 Press Note To correct delete an emergency telephone number see the bottom right of page 19 You can also enter an emergency telephone number using the directory in steps 5 7 and 9 Press or until the desired name is displayed then press Making an emergency call 1 Pres...

Page 17: ... or carbonless duplicating paper Electrostatically charged paper 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 front i e newspaper To transmit the document s with a width of less than A4 size 210mm we recommend using a copy machine to copy the original document onto A4 or letter sized pa...

Page 18: ...ting 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 conduct...

Page 19: ...ee SENSOR SECTION P 72 and SENSORS AND SWITCHES P 118 6 Abnormal wear and tear or loose parts If the glass is dirty clean them with a dry soft cloth 1 15 2 2 MAINTENANCE CYCLE No Item Cleaning Cycle Replacement Cycle Procedure 1 Separation Roller Ref No 72 3 months 7 years 100 000 documents See HOW TO REMOVE THE MOTOR BLOCK AND SEPARATION ROLLER P 89 2 Separation Rubber Ref No 21 3 months 7 years ...

Page 20: ...ely by pushing down on both ends 6 Connect the power cord and the telephone line cord Caution Do not use paper products such as paper towels or tissues to clean the inside of the unit 1 15 3 2 THE THERMAL HEAD If dirty patterns or black bands appear on a copied or received document clean the thermal head 1 Disconnect the power cord and the telephone line cord 2 Open the cover by pressing the cover...

Page 21: ...ny 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 troubleshooting double check that you hav...

Page 22: ... and try again Memory telephone numbers parameters etc has been erased Re program The backup battery on the top of the digital board may be low or dead so check it The other part y fax machine is busy or has run out of recording paper Try again The unit has run out of recording paper Install a recording paper roll Refer to INSTALLING THE RECORDING PAPER P 13 The other part y fax machine dose not p...

Page 23: ...n 2 Remove the jammed document carefully 3 Pull the leading edge of the recording paper approximately 10 cm 4 inches out of the unit Make sure that there is no slack in the paper roll 4 Close the cover securely by pushing down on both sides 5 Tear off the excess paper by pulling it towards you Do not pull out the jammed document forcibly before opening the cover 23 KX FT72BR G ...

Page 24: ...r roll in the proper direction and pull the leading edge of the paper approximately 10 cm 4 inches out of the unit Make sure that there is no slack in the paper roll 3 Close the cover securely by pushing down on both sides 4 Tear off the excess paper by pulling it towards you Note When the power cord is connected every time you close the cover a message will be printed If the recording paper is se...

Page 25: ...racked 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 appropriate troubleshooting method according to the sym...

Page 26: ...l board Cannot communicate by fax See DEFECTIVE ITS INTEGRATED TELEPHONE SYSTEM SECTION P 66 Error code is displayed See HOW TO OUTPUT THE JOURNAL REPORT P 44 Cannot talk See ANALOG BOARD SECTION P 65 DTMF tone doesn t work Handset Monitor sound volume 2 3 3 1 SIMPLE CHECK LIST SERIAL NO DATE FUNCTION JUDGEMENT REFERENCE FAX operation Transmission OK NG Receiving OK NG Copy operation FINE mode OK ...

Page 27: ...AUTO DOCUMENT FEED SECTION 2 3 4 1 NO DOCUMENT FEED CROSS REFERENCE DIGITAL BOARD SECTION P 56 POWER SUPPLY BOARD SECTION P 67 SENSOR SECTION P 72 TEST FUNCTIONS P 82 DISASSEMBLY INSTRUCTIONS P 84 27 KX FT72BR G ...

Page 28: ...2 3 4 2 DOCUMENT JAM CROSS REFERENCE SENSOR SECTION P 72 DISASSEMBLY INSTRUCTIONS P 84 28 KX FT72BR G ...

Page 29: ...2 3 4 3 MULTIPLE FEED CROSS REFERENCE DISASSEMBLY INSTRUCTIONS P 84 29 KX FT72BR G ...

Page 30: ...2 3 4 4 SKEW CROSS REFERENCE DISASSEMBLY INSTRUCTIONS P 84 30 KX FT72BR G ...

Page 31: ...2 3 4 5 IMAGE IS DISTORTED WHEN PRINTING CROSS REFERENCE READ SECTION P 73 THERMAL HEAD SECTION P 74 TEST FUNCTIONS P 82 DISASSEMBLY INSTRUCTIONS P 84 31 KX FT72BR G ...

Page 32: ...2 3 4 6 BLACK OR WHITE VERTICAL LINES APPEAR CROSS REFERENCE DIGITAL BOARD SECTION P 56 TEST FUNCTIONS P 82 2 3 4 7 SKEWED RECEIVING IMAGE 32 KX FT72BR G ...

Page 33: ...2 3 4 8 EXPANDER PRINT WHEN PRINTING CROSS REFERENCE DISASSEMBLY INSTRUCTIONS P 84 2 3 4 9 WHEN COPYING OR PRINTING AN ABNORMAL SOUND IS HEARD FROM THE UNIT 33 KX FT72BR G ...

Page 34: ...CROSS REFERENCE DISASSEMBLY INSTRUCTIONS P 84 34 KX FT72BR G ...

Page 35: ...er 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 international call The unit ...

Page 36: ...2 3 5 1 DEFECTIVE FACSIMILE SECTION 2 3 5 1 1 TRANSMIT PROBLEM CROSS REFERENCE LCD MESSAGE P 3 ADF AUTO DOCUMENT FEED SECTION P 27 OPERATION BOARD SECTION P 71 SENSOR SECTION P 72 36 KX FT72BR G ...

Page 37: ...2 3 5 1 2 SOMETIMES THERE IS A TRANSMIT PROBLEM CROSS REFERENCE LCD MESSAGE P 3 37 KX FT72BR G ...

Page 38: ...g problem when sometimes the below errors may be occurred Refer to LCD MESSAGE P 3 OUT OF PAPER CHECK COVER UNIT OVERHEATER If it doesn t return automatically COVER OPEN etc reset the unit CHECK DOCUMENT Please refer to USER RECOVERABLE ERRORS P 22 for the above items Also when a hardware deformity occurs please check each sensor 38 KX FT72BR G ...

Page 39: ...2 3 5 1 4 THE UNIT CAN COPY BUT CANNOT TRANSMIT RECEIVE 39 KX FT72BR G ...

Page 40: ...T button 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 t...

Page 41: ...rime of 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 Sendin...

Page 42: ...ION AND 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 8...

Page 43: ...g up FAX 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 Not...

Page 44: ...ted 7 50 COMMUNICATION ERROR SND PIN is transmitted to PRI Q 8 51 COMMUNICATION ERROR SND PIN is transmitted 8 52 OTHER FAX NOT RESPOND 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 YOUR UNIT RCV DCN is received after transmission of NSC 10 57 COMMUNICATION ERROR SND 300bps error 11 58 COMMUNICATION...

Page 45: ...45 KX FT72BR G ...

Page 46: ...CROSS REFERENCE TEST FUNCTIONS P 82 46 KX FT72BR G ...

Page 47: ...CROSS REFERENCE TEST FUNCTIONS P 82 47 KX FT72BR G ...

Page 48: ...48 KX FT72BR G ...

Page 49: ...CROSS REFERENCE TEST FUNCTIONS P 82 CROSS REFERENCE TEST FUNCTIONS P 82 49 KX FT72BR G ...

Page 50: ...50 KX FT72BR G ...

Page 51: ...51 KX FT72BR G ...

Page 52: ...CROSS REFERENCE TEST FUNCTIONS P 82 52 KX FT72BR G ...

Page 53: ... parameters 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 53 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...

Page 54: ...9 step 50 OK 550 Memory clear Press START NG 551 ROM check Press START NG 553 Monitor on FAX communication select 1 OFF 2 P B 3 ALL OFF OK 554 Modem test Press START NG 555 Scanner test Press START NG 556 Motor test Press START NG 557 LED test Press START NG 558 LCD test Press START NG 559 Document jam detection select 1 ON 2 OFF ON OK 561 Key test Press any key NG 570 Break select 1 61 2 67 67 OK...

Page 55: ...ce list 1 START OK OK Can set the value by the remote programming feature or print a list NG Cannot set the value Note Note Refer to SERVICE FUNCTION TABLE P 77 for descriptions of the individual codes For example the 004 Transmission report mode set value 1 ERROR 2 ON 3 OFF number corresponds to the number dialled 55 KX FT72BR G ...

Page 56: ... to detect 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 ...

Page 57: ...CK DIAGRAM The 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 FT72BR G ...

Page 58: ...58 KX FT72BR G ...

Page 59: ...Normal Wave Patterns 59 KX FT72BR G ...

Page 60: ...it 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 diagram In other words is it constantly switching between 5V or 3 3V H and 0V L as describ...

Page 61: ...CROSS REFERENCE NG EXAMPLE P 63 CHECK THE STATUS OF THE DIGITAL BOARD P 64 61 KX FT72BR G ...

Page 62: ...CROSS REFERENCE CHECK THE STATUS OF THE DIGITAL BOARD P 64 62 KX FT72BR G ...

Page 63: ...2 3 6 2 NG EXAMPLE 63 KX FT72BR G ...

Page 64: ...2 3 6 3 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 FT72BR G ...

Page 65: ...andset microphone and is output in the telephone line In this route it is mainly an analog signal Tracing the signal can be done easily using an oscilloscope Each route is shown on the CHECK SHEET P 65 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 7 1 CHECK SHEET Note Inside the digital board 65...

Page 66: ...2 3 7 2 DEFECTIVE ITS INTEGRATED TELEPHONE SYSTEM SECTION 66 KX FT72BR G ...

Page 67: ...voltage test withstanding voltage test intentional short circuit 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 t...

Page 68: ...2 Troubleshooting Flow Chart 68 KX FT72BR G ...

Page 69: ...69 KX FT72BR G ...

Page 70: ...mage 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 a...

Page 71: ...2 3 9 OPERATION BOARD SECTION 2 3 9 1 NO KEY OPERATION CROSS REFERENCE TEST FUNCTIONS P 82 2 3 9 2 NO LCD INDICATION CROSS REFERENCE TEST FUNCTIONS P 82 71 KX FT72BR G ...

Page 72: ...ON Refer to SENSORS AND SWITCHES P 118 for the circuit descriptions Refer to LCD MESSAGE P 3 2 3 10 1 CHECK THE DOCUMENT SENSOR PS1 REMOVE DOCUMENT 2 3 10 2 CHECK THE READ POSITION SENSOR PS2 CHECK DOCUMENT 72 KX FT72BR G ...

Page 73: ...2 3 11 READ SECTION Refer to SCANNING BLOCK P 112 73 KX FT72BR G ...

Page 74: ...2 3 12 THERMAL HEAD SECTION Refer to THERMAL HEAD P 110 CROSS REFERENCE SUPERVISION CIRCUIT FOR THE THERMAL HEAD TEMPERATURE P 107 THERMAL HEAD P 110 74 KX FT72BR G ...

Page 75: ...rams 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 Fun...

Page 76: ...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 76 KX FT72BR G ...

Page 77: ...er during FAX communication or not 554 Modem test Press START COPY SET 555 Scanner test Press START COPY SET 556 Motor test Press START COPY SET 557 LED test Press START COPY SET 558 LCD test Press START COPY SET 559 Setting the document jam detection 1 ON 2 OFF 1 2 1 Selects the jam detection of a document during FAX transmission copying 561 KEY test Press any key 570 Setting the break 1 61 2 67 ...

Page 78: ...ff when a call is received in the TEL FAX mode 721 Pause tone detect 1 ON 2 OFF 1 2 1 Selects the tone detection for pauses in dialing 722 Redial tone detect 1 ON 2 OFF 1 2 1 Selects the tone detection mode after redialing 731 CPC mode 1 A 2 B 3 OFF 1 2 3 1 Set the CPC signal detection mode from the converter 737 Jank corect call 1 ON T1 0 8sec T2 0 6sec 2 OFF 1 2 2 763 CNG detect time 1 10 sec 2 ...

Page 79: ...2 4 5 SERVICE MODE SETTINGS Example of a printed out list 79 KX FT72BR G ...

Page 80: ... 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 53 The JOURNAL report only gives you basic information about a communication but the JOURNAL 3 report provide differ...

Page 81: ...T 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 d...

Page 82: ...T ROM CHECK Service Mode 5 5 1 Indicates the version and checks the sum of the ROM START SCAN CHECK Service Mode 5 5 5 Tums on the LEDs of the image sensor and operates the read systems START LCD CHECK Service Mode 5 5 8 Checks the LCD indication Illuminates all the dots to check if they are normal START DTMF SINGLE TEST Service Mode 5 5 2 Outputs the DTMF as single tones Used to check the frequen...

Page 83: ...fter performing this check do not forget to turn the setting off Otherwise dialing in DTMF signal will not work 2 5 2 BUTTON CODE TABLE Code Button Name Code Button Name Code Button Name 02 RESOLUTION 31 1 87 STATION 1 03 MODE RECEIVE 32 2 88 STATION 2 04 START COPY SET 33 3 89 STATION 3 05 MEMU 34 4 3A 0 07 HELP 35 5 3B 08 MONITOR 36 6 3C 0B LOWER 37 7 3D REDIAL PAUSE 0C DIRECTORY 38 8 3E FLASH 0...

Page 84: ...3 DISASSEMBLY INSTRUCTIONS 3 1 HOW TO REMOVE THE HANDSET CRADLE CABINET HOOK BUTTON AND SPEAKER 84 KX FT72BR G ...

Page 85: ...3 2 HOW TO REMOVE THE OPERATION BLOCK 85 KX FT72BR G ...

Page 86: ...3 3 HOW TO REMOVE THE OPERATION BOARD AND LCD 86 KX FT72BR G ...

Page 87: ...3 4 HOW TO REMOVE THE BOTTOM FRAME AND ANALOG BOARD 87 KX FT72BR G ...

Page 88: ...3 5 HOW TO REMOVE THE DIGITAL POWER SUPPLY BOARD AND AC INLET 88 KX FT72BR G ...

Page 89: ...3 6 HOW TO REMOVE THE MOTOR BLOCK AND SEPARATION ROLLER 89 KX FT72BR G ...

Page 90: ...3 7 HOW TO REMOVE THE MOTOR AND GEARS OF MOTOR BLOCK 90 KX FT72BR G ...

Page 91: ...3 8 HOW TO REMOVE THE IMAGE SENSOR CIS 91 KX FT72BR G ...

Page 92: ...3 9 HOW TO REMOVE THE DOCUMENT FEED ROLLER 92 KX FT72BR G ...

Page 93: ...3 10 HOW TO REMOVE THE THERMAL HEAD 93 KX FT72BR G ...

Page 94: ...3 11 INSTALLATION POSITION OF THE LEAD WIRES 94 KX FT72BR G ...

Page 95: ...should be replaced daily 4 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 remo...

Page 96: ...4 3 FLAT PACKAGE IC INSTALLATION PROCEDURE 4 4 BRIDGE MODIFICATION PROCEDURE 96 KX FT72BR G ...

Page 97: ...5 CIRCUIT OPERATIONS 5 1 CONNECTION DIAGRAM 97 KX FT72BR G ...

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

Page 99: ...5 2 1 General Block Diagram 99 KX FT72BR G ...

Page 100: ...N1 KIN2 KIN3 RS E VOL HEAD CTL XWDERR RD WR XRESETI A0 17 D0 7 CIS CTL LED ON ASIC IC1 32 768KHz 20 736MHz 24MHz T0 T2 T5 IC7 MOTOR DRIVER TO MOTOR TO OPE PANEL RX SP H S RX H S TX TX RXIN TXOUT ANALOG FRONT END IC5 ANALOG SW IC6 TO ANALOG SRAM IC3 A0 17 D0 7 RD WR 5V 24V Q13 24V TH ON I O ANALOG PORT CONTROL TO SRAM IC3 KX FT72BR G DIGITAL BOARD BLOCK DIAGRAM 100 KX FT72BR G ...

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

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

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

Page 104: ...2 KEYIN3 3 3V YES KIN3 I O Key read read start position sensor control 183 KEYIN4 3 3V YES OPEN O Not used 184 KEYIN5 3 3V YES OPEN O Not used 185 OPLED 3 3V YES OPESEL OD Operation panel control 186 VSS DG GND 187 3 3V 3 3V OD Power supply 188 KSTART 3 3V YES KSTART OD LCD control 189 KLATCH 3 3V YES KLATCH OD Key scan LCD control 190 KSCLK 3 3V YES KSCLK OD Key scan LCD control 191 KTXD 3 3V YES...

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

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

Page 107: ...nt 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 th...

Page 108: ...nd black is regarded as 1 Then via routes 4 and 5 they are stored in RAM 4 The white 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 85 times mm Fine Reads 7 7 times mm Super Fine Reads 15 4 times mm Tran...

Page 109: ...5 4 2 BLOCK DIAGRAM 109 KX FT72BR G ...

Page 110: ...f dot increment 1728 all the shift registers become filled with data and a latch pulse is emitted to each IC from IC1 pin 167 THLAT With this latch pulse all the contents of the shift registers are latched to the latch registers Thereafter through the addition of strobes from the IC1 pins 159 160 only black dot locations 1 among latched data activates the driver and the current passes to heat the ...

Page 111: ...111 KX FT72BR G ...

Page 112: ...de IC7 turns on This applies voltage to the LED array to light it The contact image sensor is driven by each of the FTG F1 signals output from IC1 and the original image illuminated by the LED array undergoes photoelectric conversion to output an analog image signal AIN The analog image signal is input to the system LSI IC1 on ANA1 pin 205 of IC1 and converted into 8 bit data by the A D converter ...

Page 113: ...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 5...

Page 114: ...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 Transmitmode B Receive mode and C Copy mode In Fig B you can see which mode is selected by the position of the rib in the CAM 114 KX FT72BR G ...

Page 115: ...r 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 5 4 6 3 MECHANICAL MOVEMENTS IN THE MAIN OPER...

Page 116: ...5 4 6 3 2 SCANNING CROSS REFERENCE SENSOR SECTION P 72 5 4 6 3 3 PRINTING Note See 6 5 SENSERS AND SWITCHES 116 KX FT72BR G ...

Page 117: ...5 4 6 3 4 COPYING CROSS REFERENCE SENSOR SECTION P 72 117 KX FT72BR G ...

Page 118: ...Sensor Circuit Location Sensor Sensor or Switch Name Message Error Digital SW3 Motor Position Analog SW1 Cover Open and Paper set CHECK COVER and OUT OF PAPER SW2 Hook SW Operation Panel PS2 Document Read Position REMOVE DOCUMENT PS1 Document CHECK DOCUMENT 118 KX FT72BR G ...

Page 119: ...ND PAPER SET SWITCH SW1 When there is no recording paper the plate is separated from the switch lever and the switch turns off Pin 9 of CN101 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 CN101 Analog board becomes a low level Analog Board Signal CN1 9 Pin Paper Low level No paper High level 119 KX FT72BR G ...

Page 120: ...peration Board Photo transistor Signal CN2 5 Pin Out of the Read Position OFF High level At the Read Position ON Low level 5 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 transi...

Page 121: ...anent organizations of the 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...

Page 122: ...me consists 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 tim...

Page 123: ...s at 300 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...

Page 124: ... line length 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 ...

Page 125: ...the receiving 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 ...

Page 126: ...b Redundancy Compression Process Coding Mode This unit uses one dimensional MH format 126 KX FT72BR G ...

Page 127: ...acsimile Reception The analog image data which is received from the telephone line passes through the NCU section and enters pin 15 of the analog front end IC5 The signals that enter pin 15 of the analog front end IC5 convert the analog signals to the digital signals then the data is sent to the modem IC1 Refer to CHECK SHEET P 65 3 DTMF Transmission The DTMF signal generated in the ASIC IC1 is se...

Page 128: ...BELL HANDSET CN5 CN3 CN2 VOL MODEM ASIC IC1 Analog Front End IC5 SW2 SW1 PAPER HOOK H STX H SRX SPOUT SPEAKER SP AMP SP MUTE H SRX ENB TEL RX ENB LINERX LINETX MTX ENB H STX MUTE MOM RX ENB T T1 R R1 R12 R52 IC2 R49 R48 C47 L5 L8 L6 L7 1 4 3 2 R61 R62 R64 C49 R63 Q2 C50 C53 C54 KX FT72BR G ANALOG BOARD BLOCK DIAGRAM 128 KX FT72BR G ...

Page 129: ...telephone side Break and switches to the open side make when the unit starts facsimile communication Pulse dialing is also performed by ON OFF of the relay IC1 99 High Level CN9 8 CN1 8 Q3 ON RL1 make 5 8 3 BELL DETECTION CIRCUIT Circuit Operation The signal waveform for each section is indicated below The signal low level section input to pin 19 of ASIC IC4 on the digital board is read TEL LINE P...

Page 130: ... dB from pin 6 The transmission signal is input from CN1 pin 11 and output to the TEL line through C30 R31 and T2 Without a side tone circuit the transmission signal would return to the reception amplifier via C30 and R31 Here the signal output from CN1 pin 11 passes through C30 C36 and R39 and enters the amplifier IC2 pin 5 This is used to cancel the return portion of the transmission signal This...

Page 131: ... path Refer to CHECK SHEET P 65 5 9 3 HANDSET CIRCUIT 1 Transmission signal Refer to 2 3 4 4 Analog Board Section 2 Reception Signal Refer to CHECK SHEET P 65 5 9 4 MONITOR CIRCUIT 1 DTMF Monitor Monitor Refer to CHECK SHEET P 65 Handset 2 Alarm Beep Key tone Bell Refer to CHECK SHEET P 65 3 Dummy Ring Back Tone Same with the modem signal transmission 5 10 EXT TEL EXT TEL JACK is provided for the ...

Page 132: ...5 10 1 CIRCUIT DIAGRAM 132 KX FT72BR G ...

Page 133: ...igital board IC1 ASIC DIGITAL BOARD OPERATION BOARD READ POSITION SENSOR DOCUMENT SENSOR CN6 CN2 CN7 CN1 Chip on board type ANALOG SW IC1 CN3 8X4 KEYS MATRIX LCD KX FT72BR G OPERATION BOARD BLOCK DIAGRAM 5 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 ...

Page 134: ... DETECTION When CN1 8 OPSEL is L the detection of the document sensor and read start position sensor are available 5 11 3 LCD CONTROL KTXD KSCLK KLATCH and KSTART are sent as D0 D3 to control the LCD 134 KX FT72BR G ...

Page 135: ...5 12 POWER SUPPLY BOARD SECTION 135 KX FT72BR G ...

Page 136: ... surge voltage generated by the transformer Control Circuit and Detecting Circuit The control circuit amplifies the output with increased voltage detected in the error detecting circuit Then it drives the main 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 c...

Page 137: ...6 TERMINAL GUIDE OF THE ICs TRANSISTORS AND DIODES 137 KX FT72BR G ...

Page 138: ...7 FIXTURES AND TOOLS 138 KX FT72BR G ...

Page 139: ...8 CABINET MECHANICAL AND ELECTRICAL PARTS LOCATION 8 1 OPERATION PANEL SECTION 139 KX FT72BR G ...

Page 140: ...8 2 UPPER CABINET SECTION 140 KX FT72BR G ...

Page 141: ...8 3 LOWER CABINET P C B SECTION CROSS REFFERENCE MOTOR SECTION P 142 141 KX FT72BR G ...

Page 142: ...8 4 MOTOR SECTION 142 KX FT72BR G ...

Page 143: ...8 5 ACTUAL SIZE OF SCREWS 143 KX FT72BR G ...

Page 144: ...9 ACCESSORIES AND PACKING MATERIALS 144 KX FT72BR G ...

Page 145: ...PARATION 22 Not Used 23 PFUS1173Z TORSION SPRING DOCUMENT FEED 24 PFHX1251Z PLASTIC PARTS READING SHEET 25 PFDJ1021Z SPACER PLATEN RIHGT 26 PFBX1172Z2 PUSH BUTTON FUNCTION NAVI S 27 PFBX1173Z3 PUSH BUTTON COPY STOP S 28 PFBC1094Z1 PUSH BUTTON START S 29 PFUS1222Z SPRING SLIDER 30 PFKS1070Z3 TRAY DOCUMENT 10 1 2 UPPER CABINET THERMAL HEAD SECTION Ref No Part No Part Name Description Remarks 50 PFKM...

Page 146: ...PQVINJM4558M IC S TRANSISTORS Q1 2SB1197K TRANSISTOR SI S Q2 2SA933 TRANSISTOR SI S Q3 2SD1819A TRANSISTOR SI S Ref No Part No Part Name Description Remarks Q4 2SD1819A TRANSISTOR SI S Q6 PQVTDTC114EU TRANSISTOR SI S Q7 2SB1322 TRANSISTOR SI S Q8 PQVTDTC114EU TRANSISTOR SI S Q9 2SB1218A TRANSISTOR SI Q10 2SD1819A TRANSISTOR SI S Q11 2SD1819A TRANSISTOR SI S Q13 PFVTSI4431DY TRANSISTOR SI S Q14 PQV...

Page 147: ...2 4 7K R87 ERJ3GEYJ224 220K R88 ERJ3GEYJ224 220K R89 ERJ3GEYJ103 10K Ref No Part No Part Name Description Remarks R90 ERJ3GEYJ224 220K R91 ERJ3GEYJ224 220K R92 ERJ3GEYJ222 2 2K R93 ERJ3GEYJ473 47K R98 ERJ3GEYJ102 1K R99 ERJ3GEY0R00 0 R102 ERJ3GEYJ821 820 R103 ERJ3GEYJ821 820 R104 ERJ3GEYJ821 820 R107 ERJ3GEYJ102 1K R108 ERJ3GEYJ102 1K R109 ERJ3GEYJ102 1K R110 ERJ3GEYJ102 1K R112 ERJ3GEYJ101 100 R1...

Page 148: ... S SWITCHES SW1 PFSH1A03Z SWITCH S SW2 ESE14A211 SWITCH TRANSFORMER Ref No Part No Part Name Description Remarks T2 G4A1A0000160 TRANSFORMER COILS L1 PQLQR2KA213 COIL S L2 PQLQR2KA213 COIL S L3 PQLQR2KA213 COIL S L4 PQLQR2KA213 COIL S L5 PQLQR1RS102 COIL S L6 PQLQR1RS102 COIL L7 PQLQR1RS102 COIL L8 PQLQR1RS102 COIL S L11 PQLQR2KA213 COIL S L12 PQLQR2KA213 COIL S PHOTO ELECTRIC TRANSDUCER PC1 PQVIP...

Page 149: ...WITCH SW21 EVQ11Y05B SWITCH SW22 EVQ11Y05B SWITCH SW23 EVQ11Y05B SWITCH SW24 EVQ11Y05B SWITCH SW25 EVQ11Y05B SWITCH SW26 EVQ11Y05B SWITCH SW27 EVQ11Y05B SWITCH SW28 EVQ11Y05B SWITCH SW29 EVQ11Y05B SWITCH SW30 EVQ11Y05B SWITCH Ref No Part No Part Name Description Remarks SW31 EVQ11Y05B SWITCH RESISTORS R2 ERJ3GEYJ103 10k R3 ERJ3GEYJ103 10k R4 ERJ3GEYJ103 10k R5 ERJ3GEYJ103 10k R7 ERJ3GEYJ103 10k R1...

Page 150: ...471 470 C202 ECKD3A102KBP 0 001 C203 PFCEA16A470 47 S C204 PFCEA35A47M 47 S C205 PFCEA50A1M 1 S FUSE F101 PQBA1C50NBKL FUSE VARIABLE RESISTOR VR201 EVNDJAA03B53 SWMI FIXED RESISTOR VARISTORS ZNR101 ERZV10DK471U VARISTOR ZNR102 ERZV10DK471U VARISTOR OTHERS T101 ETS29AK4J5AC TRANSFORMER L101 PFLES11V0712 FILTER 10 6 FIXTURES AND TOOLS Ref No Part No Part Name Description EC1 PQZZ8K18Z EXTENSION CABL...

Page 151: ...77 C91 L22 R63 C106 C30 A B C D E R71 R68 R69 R67 R70 J11 Q14 Q15 J10 R99 C95 C11 C92 R103 C101 C31 C89 C21 C10 C97 C12 C6 C28 R29 C44 C39 C47 C46 C29 R21 15 14 28 1 C35 R58 C63 R60 C61 C103 R53 C66 C65 R43 R87 C55 C80 R88 R52 R62 3 3V 12V 24VA IC8 R20 Q13 C83 R91 R90 Q10 R89 J12 C82 IC9 IC5 R102 R36 R24 R25 D7 4 1 8 5 1 8 5 4 5V B 3 3V B RESET1 RESET2 1 4 5 8 D2 PFUP1267ZA DIGITAL BOARD COMPONENT...

Page 152: ... C24 C40 R13 C46 5V R18 GND IC4 TP13 C104 L19 L10 C77 C75 R66 C17 R110 R100 R8 R109 R108 R107 R92 D6 1 1 9 1 1 9 5 6 8 F3 R79 AUTO CH PCB 24V CH R64 1 32 17 F1 C99 R74 J13 16 IC2 C98 2 2 2 1 1 5 16 9 8 RA1 R135 CN4 CN1 8 1 C76 C34 11 1 1 IC7 E D3 Q7 1 25A 10 TP12 2 CN8 CN6 CN7 C90 CN5 CN3 C79 Q1 REF CH RA2 RA3 BAT1 X3 R34 R37 C45 RA5 R11 R12 R10 RA4 C36 R22 R59 R57 C62 C64 C33 R19 C32 R101 R75 Q8 ...

Page 153: ...2 C56 R51 R4 R19 R18 R9 J3 1 17 Q3 R75 1 4 5 8 IC1 C43 C45 R73 R72 R45 L8 L7 L5 L6 R63 R62 R49 R66 R65 R53 R55 R67 C50 R64 C49 C55 R34 C24 R41 C31 C23 R38 R39 R54 C22 C21 C26 C32 R42 C33 R52 R50 C57 C65 R46 C53 R48 C52 C51 R47 C54 Q2 Q11 C46 CN3 C40 C41 R74 R23 R22 L1 L2 L12 D1 L3 L4 CN5 CN4 L11 Q6 R24 24V 5VD AG DG 5VA IC2 5 8 1 4 PFUP1268ZA ANALOG BOARD COMPONENT KX FT72BR G KX FT72BR G 153 ...

Page 154: ...FUP1268ZA D2 D3 D6 R82 R83 JJ8 JJ10 R71 JJ57 JJ21 JJ52 JJ51 JJ9 RL1 PC2 JJ12 JJ11 JJ13 JJ59 JJ53 JJ14 R84 R85 JJ15 JJ16 JJ17 JJ18 JJ19 R32 R31 JJ20 CN1 17 1 JJ54 JJ55 JJ56 R37 PCB CH AUTO CH C42 C44 C58 R61 D4 D12 D11 SW1 T1 T2 C61 C30 C60 C48 C47 D8 D9 CN3 CN2 1 2 PC1 PC4 SW2 JJ4 JJ5 JJ6 JJ7 ANALOG BOARD BOTTOM KX FT72BR G KX FT72BR G 154 ...

Page 155: ...SW12 SW20 2 3 4 5 6 ERASE PLAY BROADCAST RECORD NEXT MENU 7 8 9 0 SW5 JJ2 JJ1 C9 JJ8 JJ9 JJ10 JJ11 JJ39 JJ12 JJ13 J102 JJ22 JJ21 JJ20 JJ18 JJ17 JJ16 JJ15 JJ14 JJ24 JJ29 JJ30 JJ31 JJ32 JJ37 JJ38 CN2 CN1 1 1 3 7 9 8 6 2 2 JJ25 JJ19 JJ36 JJ35 JJ33 JJ34 D2 C2 JJ3 JJ4 JJ6 JJ7 PS1 1 10 CN3 LED1 PS2 SW4 SW3 SW6 SW21 SW22 SW29 SW13 SW14 HELP VOL VOL SW30 D1 SW2 AUTO CH PCB CH SW23 SW7 SW15 JJ26 FAX START ...

Page 156: ...01 C101 D104 D103 C103 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 SRF912UC MITSUMI ELEC CO LTD 68 4492A KPC 7694V 0 94V 0 AC125V 5B F101 CN31 R112 R105 G D S R104 PC101 T101 R221 R222 J8 R225 CN301 R223 R111 R113 E C B B...

Page 157: ...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 157 KX FT72BR G ...

Page 158: ...4 20KOSC IOP56 145 ADR13 146 ADR14 147 3 3V 148 ADR15 149 RM0 IOP00 150 RM1 IOP01 151 RM2 IOP02 152 RM3 IOP03 153 RXE IP04 154 TM0 IOP10 155 TM1 IOP11 156 TM2 IOP12 157TM3 IOP13 158 TXE IP14 159 STB1 160 STB2 161 STB3 162 STB4 163 THDAT 164 VSS 165 MULT3 5 166 THCLK 167 THLAT 168 STBNP 169 3 3V 170 TXD2 IOP 171 RXD2 IOP 172 RTS2 IOP 173 CTS2 IOP 174 DSR2 IOP 175 DCD2 IOP 176 DTR2 IOP 177 RI2 IOP 1...

Page 159: ... R43 220K C58 K0 1 R49 68K 2 IC9 5 6 7 12V R53 82K C61 J180P TP10 24VF 5V 5VA C53 K0 1 C54 K2200P R44 3 9M NC R31 Q1 5V C37 NC C35 Z0 1 C36 6 3V 100u C34 6 3v100u C28 Z0 1 1K R13 K0 1 C27 10K R24 5V 10K R25 Q11 R92 2 2K CN1 0 1 24v 2 24v 3 24v 4 GND 5 GND 6 GND 7 5V 8 PDET 2 2K R18 5V 10K R17 D6 5VA 5V R100 NC R101 NC R102 820 R103 820 R104 820 R107 1K R108 1K R109 1K D7 C89 NC R112 100 R113 1K R1...

Page 160: ...0 NC C41 NC C24 K0 1 R42 27K C25 J100p C27 NC R35 180K R37 2 2K 5VA C23 K0 1 C32 NC 2 IC2 7 6 5 4 8 R33 56K C33 K8200p C20 K0 01 R39 1 8K R41 0 R34 56K D12 5 6V R36 180K R31 180 1 4W C30 50V4 7 D11 5 6V C26 Z0 1 2 0V L10 NC 4 1 3 2 L3 2A102ST CN5 4 3 L4 2A102ST C31 K0 068 R38 100K R32 22 1 4W C21 NC C22 NC D1 NC C6 NC C5 NC C7 NC Q5 NC R9 NC PC4 NC 1 2 3 4 D2 NC Q4 NC Q11 NC Q12 NC R66 NC R55 NC P...

Page 161: ...12 56K R11 270 D1 5V 5V C6 Z0 22u C7 NC C8 NC SW28 FLASH SW29 MENU C9 NC C5 NC Q4 NC R6 NC C4 NC R9 NC R8 NC C3 NC R29 NC R27 NC 5V CN2 1 MICIN 2 AG 3 NC 4 DG 5 KRXD 6 KTXD 7 KLATCH 8 KSCLK R5 10K CN3 1 VSS 2 VDD 3 V0 4 RS 5 R W 6 E 7 DB0 8 DB1 9 DB2 10 DB3 5V D2 LED1 R31 NC Q5 NC R32 NC CN1 0 1 KSTART 2 KIN3 3 KIN2 4 KIN1 5 KIN0 6 E 7 RS 8 OPESEL 9 5V R33 4 7 SW9 5 SW23 STOP R28 10K R30 750 SW1 N...

Page 162: ...R112 R111 330K 330K 330K C101 0 22 GND F101 5A125V CN31 1 2 L N C104 2200p 2200p C105 2200pF C106 R102 220K R103 220K C107 330p R101 5 6 2 680 2 R205 C201 D204 470 35 680 2 R206 C204 47 35 C203 470 16 R104 15K R222 4 7K R221 680 R226 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 Cycle 2 2 s Cycle 2 2 s 25 5V 10V 0V...

Page 163: ...163 KX FT72BR G Y M KXFT72BRG ...

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