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Panasonic KX-F910BX, Service Manual

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KX-F910BX

5-2.MODEM CIRCUIT OPERATION

The modem (IC11) has all the hardware satisfying the ITU-T standards mentioned previously.
When the gate array IC1 (116) is brought to low level, the modem (IC11) is chip-selected and resistors inside IC are selected
by select signals from ASIC (IC1) A0-A4, commands are written through data bus, and all processing is controlled at the ASIC
(IC1) according to ITU-T procedures. Here the signal INT dispatched from IRQ (pin 52 of IC11) to the ASIC (IC1) when
preparation for acceptance of transmission data is OK and when demodulation of reception data is complete, the ASIC (IC1)
implements post processing. This modem (IC11) has an automatic application equalizer. With training signal 1 or 2 at time of
G3 reception, it can automatically establish the optimum equalizer. Also, the modem (IC11) generates an internal clock of
24.00014MHz by means of an external crystal oscillator (X1).

(1) Facsimile Transmission/DTMF Line Send

The digital image data on the data bus is modulated in the modem (IC11), and sent from pin 44 via amplifier
IC10 (6 

¤

 7), the NCU section to the telephone line.

IC11 (44)

 

¤

 C73 

¤

 R90 

¤

 IC10(6-7) 

¤

 CN1(10) 

¤

 CN271(10) 

¤

 C184 

¤

 R182 

¤

 IC151(73-63) 

¤

 

¤

 C74

[C203 

¤

 R210 

¤

 IC201(2-1) 

¤

 C202 

¤

 R201 

¤

 T101] 

¤

 TEL LINE.

[       ]: NCU section

(2) Facsimile Reception

The analog image deta Which is received from the telephone line passes through the NCU section and enters pin 45 of the
modem (IC11). The signals that enter pin 45 of the modem (IC11) are demodulated in the board to digital image signals,
then placed on the data bus.
In this case, the image signals from the telephone line are transmitted serially, Hence they are placed on the bus in 8 bit
units. Here, internal the equalizer circuit reduces the image signals to the long-distance receiving level.
It is designed to correct the characteristics of the frequency band centered about 3 kHz and maintain a constant receiving
sensitivity. It can be set in the service mode.

TEL.Line

 

¤

 T101 

¤

 R202 

¤

 C205 

¤

 IC201(6-7) 

¤

 C210 

¤

 C212 

¤

 R215 

¤

 C213 

¤

 IC202(1-2) 

¤

 C217

 

¤

 CN271(9) 

¤

 R11 

¤

 IC10(2-1) 

¤

 C19 

¤

 R13 

¤

 IC11(45)

(3) DTMF Transmission (Monitor tone)

The DTMF signal generated in the modem (IC11) is output from pin 44, then passes through the analog G/A IC151, and
the NCU section to the telephone line as same as facsimile transmission signals.

(DTMF Monitor Tone)

IC11 (44)

 

¤

 C73 

¤

R90 

¤

 IC10(6-7) 

¤

 CN1(10) 

¤

 CN271(10) 

¤

 C184 

¤

 R184 

¤

 IC151(76-41) 

¤

 C158 

¤

R161 

¤

 

¤

 C74

IC151 (40-38) 

¤

 R245 

¤

 C245 

¤

 IC241(4-5,8) 

¤

 Speaker

(4) Call Tone Transmission

The call signal which is generated in the ASIC (IC1) passes through analog G/A IC151 and IC241 (4 

¤

 8, 5) to the speaker.

IC1

(85,87)

 

¤

 R59 

¤

 C56 

¤

 CN2(1) 

¤

 CN272(1) 

¤

 R186 

¤

 C187 

¤

 IC151(78-41) 

¤

 C158 

¤

 R161 

¤

 

¤

 R60 

¤

 C57

IC151 (40-38) 

¤

 R245 

¤

 C245 

¤

 IC241(4-5,8) 

¤

 Speaker

(5) Busy/Dial Tone Detection

The path is the same as for FAX receiving. When it is detected, the carrier detect bit  of the resistor in the modem
(IC11) becomes 1, and this status is monitored by the ASIC (IC1).

Summary of Contents for KX-F910BX

Page 1: ......

Page 2: ...wire 2 Turn on the power switch 3 Measure the resistance value with an ohmmeter between the jumpered AC plug and each exposed metal cabinet part screwheads control shafts handle brackets etc Note Some exposed parts may be isolated from the chassis by design These will read infinity 4 If the measurement is outside the specified limits there is a possibility of a shock hazard The equipment should be...

Page 3: ...long as they are separated to prevent short circuits and packed in strong packaging Commercial firms that dispose of any quantity of lithium cells should have a mechanism in place to account for their ulti mate disposition This is a good practice for all types of commercial or industrial waste Recommend Type Number CR2032 BATT Manufactured by MATSUSHITA CR2032 BATT Manufactured by SONY BOTTOM VIEW...

Page 4: ...e two rollers rotate Also the spurs are metal and sharply pointed Be careful not to touch them accidentally by hand If your Panasonic battery is fully charged While in use TALK Up to about 2 5 hours While not in use Stand By Up to about 4 days E Battery life may vary depending on usage conditions and ambient temperature EClean the handset and the main unit charge contacts with a dry soft cloth onc...

Page 5: ...ec page G3 Normal mode Horizontal 8 pels mm 203 pels inch Vertical 3 85 lines mm 98 lines inch Standard mode 7 7 lines mm 196 lines inch Fine Halftone mode 15 4 lines mm 392 lines inch Superfine mode 64 level CCD image sensor Thermal printing Modified Huffman MH Modified READ MR 9600 7200 4800 2400 bps Automatic Fallback 5 35 41 95 F 45 85 RH Relative Humidity Approx 118 366 265 mm 4 21 32 13 3 8 ...

Page 6: ...er tray Paper stacker Antenna Document entrance 2 3 4 5 6 7 8 9 0 TONE REDIAL PAUSE FLASH 1 MUTE ABC DEF GHI JKL MNO PQRS TUV WXYZ MIC SP PHONE HELP DIRECTORY MENU RESOLUTION AUTO RECEIVE LOCATOR INTERCOM FAX IN USE 1 2 3 4 5 6 7 8 9 10 LOWER VOLUME STOP START COPY SET RINGER SP PHONE Direct call stations LOWER RESOLUTION DIRECTORY HELP Dial keypad MENU Display panel TONE FLASH AUTO RECEIVE MUTE R...

Page 7: ... machine interface 64 Level halftones resolution Large 165 ft paper roll Help printout Facsimile Easy to view LCD 16 character Automatic document feeder up to 15 sheets Paper curl reduction technology Resolution Standard Fine Super Fine Half Tone Distinctive ring detection Super thermal paper Correct order reception printout Handset FEATURES PAUSE Button INTERCOM Button and Indicator REDIAL Button...

Page 8: ...AX or MP1 ITW LINX You can connect an extension phone or a telephone answering machine to the unit after removing the stopper on the external telephone jack EXT When you operate this product the power outlet should be near the product and easily accessible Helpful hint If assistance is needed press HELP The unit will print a quick reference Connect to LINE Power cord Telephone line cord Single tel...

Page 9: ...pressing down on both ends 2 Insert the leading edge of the recording paper between the recording paper roller and the silver plate incorrect correct INSTALLATION 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 The beginning of some recording paper rolls are secured with glue or tape Cut ap...

Page 10: ...in unit push down and twist the antenna onto the main unit Keep the antenna in an upright position to get the best reception 4 Installing the spare battery cover on the main unit 5 Installing the battery in the handset Close the spare battery cover Install the battery as shown observing the proper polarity 2 Install the battery cover Paper stack Battery ...

Page 11: ...one line 4 Determine causes Determine the causes of the equipment trouble by troubleshooting 5 Equipment repairs Repair or replace the defective parts and take appropriate measures at this stage to ensure that the problem does not recur 6 Confirm normal operation of the equipment After completing the repairs conduct copying self testing and communications testing to confirm that the equipment oper...

Page 12: ...P 16 See P 16 See P 123 See P 121 OPERATION Document Path Rollers Recording Paper Roller Thermal Head LED Array Sensors Mirrors and Lens Abnormal wear and tear or loose parts CHECK ITEM Remove any foreign matter such as scrap of paper If a roller is dirty clean it with a damp cloth then let dry thoroughly If the platen is dirty clean it with a damp cloth then let dry thoroughly Remove the paper be...

Page 13: ...ssing the front lid open button Clean the document feeder rollers and roller with a cloth moistened with isopropyl rubbing alcohol and let dry thoroughly Clean the rubber flap with a cotton swab moistened with isopropyl rubbing alcohol and let dry thoroughly Clean the white plate and glass with a soft dry cloth Clean the front lid by gently pressing down on both ends Connect the power cord and the...

Page 14: ...r thickness lever is set correctly and that the paper is set correctly without any looseness 2 Before troubleshooting first check that the connectors and cables are connected correctly without any looseness Especially if the abnormality occurs randomly check very carefully 3 When connecting the AC power cord with the unit case and checking the operation exercise utmost care in handling the electri...

Page 15: ...s busy or ran out of recording paper Try again The unit ran out of recording paper Install a new recording paper A recording paper jam occurred Clean the jammed paper The other fax machine does not provide the polling function Check with the other party The receiving unit is busy or ran out of recording paper Try again The document is jammed Remove the jammed document Attempted to transmit a docum...

Page 16: ...eshooting method If it s tough to finding out just a broken component we should so arrange that block or section are specified for example digital board or image sensor A claim tag from customer or dealer gives us many kinds of expression for same trouble Because they are not technician or engineer But we should carefully read it on our supposition comes from experience and sufficiently test the f...

Page 17: ...ng No feed Paper jam Multiple feed Skew No feed Paper jam Multiple feed Skew Abnormal sound from the product Can not cut the recording paper Voltage output is abnormal Keys are not accepted PAPER JAM is displayed CHECK COVER is displayed Can not fax communicate Error code is displayed Can not talk DTMF tone doesn t work Monitor sound volume No link Battery won t charge No voice reception No voice ...

Page 18: ...ry charge OK NG OK NG OK NG OK NG OK NG OK NG OK NG OK NG OK NG OK NG OK NG OK NG OK NG OK NG OK NG OK NG OK NG OK NG OK NG FAX operation Copy operation Telephone operation Operation panel Sensor Clock External TAM Cordless operation 3 4 EASY CHECK LIST FUNCTION JUDGEMENT REFERENCE SERVICE CODE 815 SERVICE CODE 561 SERVICE CODE 557 SERVICE CODE 558 SERVICE CODE 815 gain correctly compare to your w...

Page 19: ...k the gear Is the voltage at emitter of Q1 24 V Is the voltage at collector of Q1 24 V Is the voltage at pin 11 of IC7 less than 2V Replace Q1 Check the Motor and connector Is the phase signal from pins 73 77 of IC1 out put Is the solder at pins 73 77 of IC1 OK Replace IC7 OK OK OK OK OK OK OK OK YES END YES YES NO NO NG END NO NG YES NO YES NO YES NO Cleaning of separation roller page120 Does the...

Page 20: ...section page 77 Check if the sensor reacts while the flag is moving Check the separation feed and pinch rollers are attached correctly Repair defective parts Check each sensors movement Check each rollers mount Check the white plate Replace the white plate Cleaning the each rollers pages 120 and 121 OK OK OK OK NG 2 Paper JAM OK OK OK NG NG NG NG YES YES YES END END END END NO NO NO OK OK OK OK Op...

Page 21: ...separation spring is distorting Cleaning the each rollers pages 120 and 121 Replace the separation pad roller and pressure spring Confirms whether the pad is dirty or not and is attached correctly Cleaning or replace the defective parts OK YES NO NG NG NG OK OK OK OK OK OK END END END ...

Page 22: ...arts Replace the separation pressure spring Replace white plate Repair or replace the defective parts Check the balance of both separation pressure springs Check the white plate Refer to Fig A of page 24 Check CCD unit Cleaning the each rollers page 120 and 121 OK OK OK OK OK OK NO END END END END END END NG NG NG NG NG END NO NO NO NO YES YES YES YES OK OK OK OK OK OK OK OK OK OK OK Checks whethe...

Page 23: ...s peeling Replace the white plate Check the separation feed and pinch rollers are attached correctly Repair defective parts Cleaning the each rollers page 120 and 121 If expansion and contraction becomes within 1 5 this is standard and OK Cleaning the each rollers page 120 and 121 Check white plate Check each rollers Check the each rollers dirty and scar To thermal head section page 84 OK OK OK OK...

Page 24: ...Is line appear Cleaning feed route Please the white plate and target glass thoroughly If the dirt cannot be removed change the white plate Is line appear Replace white plate CCD unit etc To digital board section page 54 OK END To thermal head section page 84 YES YES NG NO NO OK END ...

Page 25: ...e 121 Replace the defective parts Replace the defective parts Check the connector gear and arm Replace the motor gear and arm Replace the digital board Replace the cutter unit Check the each sensor levers movement Check the each sensor Test the cutter movement OK OK OK OK OK OK END OK OK NO NO NG NG NG NG YES YES YES YES ...

Page 26: ...e 9 Expanded print Check the setting of recording paper Reset the recording paper Replace the recording paper roller Check the front lid open button locked Lock the front lid open button Cleaning the each rollers pages 120 and 121 NG NG OK ...

Page 27: ...recording paper roller etc parts are attached correctly and fix or change the abnormal part Check the drive gear for damage inserted foreign objects and also if the pendulum gear spring is attached correctly Check the other rotation sections operations oscillation sections and fix or change the abnormal part Contact Fix change the abnormal part Recording paper conveyance Confirm the drive section ...

Page 28: ...oes it recur Does it recur Change the gear and gear chassis Check the drive gear for damage inserted foreign objects or abnormal installations Fix clean or change the abnormal part Do not apply large amounts to other parts Refer to page 206 END OK END NO NO NO YES YES YES A ...

Page 29: ...not received If the DTMF tone is not heard change the IC11 modem If the DTMF tone is heard there is a problem in the signal pass route Another problem Confirm the repair method in the DEFECTIVE FACSIMILE SECTION Refer to page 34 A communication error has arose The sending side s signal was cut during receiving Communication error causes 1 User unit 2 Circuit condition 3 Other party unit It is poss...

Page 30: ... communica tion result is error Press down READ SEN SOR gently and release it to be come up immedi ately Clean up separation roller using damp cloth And try again Rubbing alcohol Replace separation roller with new one Need to service ECheck sensor is in stalled properly No feed at all even one page ADF section 1 Defective facsimile section 1 Transmit problem YES NO NG NO NO NG NO YES YES YES OK Re...

Page 31: ...ransmit level set from 10 dBm to 5 dBm or some Document goes through Ask other party changing RX equalizer increas ing TX level Ask other party increas ing TX level Ask RX party increase a parameter of RX error line value to more than No available Confirm sent image on RX side has many er rors Change 717 Transmit speed select to 7200 4800 or 2400 bps EIncrease 596 Transmit level set from 10 dBm to...

Page 32: ...0 bps to some value Error code No 68 Echo Decrease 596 Transmit level set from 10 dBm to 12 dBm or some Change 718 Receive speed select to 7200 4800 or 2400 bps Ask sender below change EIncrease TX level EChange TX equalizer 2 Receive problem No Looks OK NO YES NO NO YES YES YES Confirm below before starting troubleshooting CHECK THERMAL PAPER CHECK COVER OVERHEATED doesn t return automatically CO...

Page 33: ...ect the PBX and TEL line and off hook Check the trace between pins 44 of IC11 and Tip Ring Is the signal at pin 45 of IC11 dial tone input Replace IC11 Check the trace between T1 and pin 45 of IC11 Is the signal at pins 44 of IC11 output Is the voltage at pin 8 of IC10 24 V Check the solder at pins 116 of IC1 Replace IC11 OK 3 Unit can copy but can not transmit receive YES YES YES YES NO NO NO NO ...

Page 34: ...the START button has been pressed for models with a START button the other party should be called manually if possible Another possibility is entry of two pauses at the end of the auto dial number of the transmission side In this way the start time for the count can be delayed by 2 pauses about 10sec Cause 2 Erroneous detection because of echo or erroneous detection because of an echo canceler Sta...

Page 35: ...this signal should be 2100Hz S1 and S2 will become ON Then the echo of the DIS signal output afterwards may be received and FAX1 may execute erroneous operation preventing start of communication Countermeasure B In service mode the CED signal frequency is set to 1100 Hz code No 520 or the time setting between the CED signal and the DIS signal is set from 75msec to 500msec in service mode code No 5...

Page 36: ...rvice mode code No 594 Does not receive 1 The time setting between the CED signal and the DIS signal is set to 500msec service mode code No 593 2 The CED frequency is set to 1100Hz service mode code No 520 D Unit can copy but the transmission and reception image is incorrect Long distance or international communication operation This depends widely on the transmission and reception capability of t...

Page 37: ...1 53 54 57 58 59 64 68 70 72 FF TX TRANSMISSION RX RECEPTION SYMPTOM Communication was interrupted with the STOP button Document paper is jammed No document paper Thermal head is overheated Out of thermal paper Cover is open Recording paper is jammed Transmission is finished when T1 TIMER is expired DCN is received after DCS transmission FTT is received after transmission of 2400BSP training signa...

Page 38: ...the reception mode or answering machine s message is on Is the receiver s FAX machine is the out of pa per or mechanical error status Confirm the receiver s FAX ma chine Is it the same brand as our products Is the password check mode set Have the receiver s parameter list printed Ask the receiver to cancel password of the receiver s FAX machine or set the caller s password corresponding to the rec...

Page 39: ...de on the receiver Is communication OK Perform voice communication with the receiver End Check if the line is not inter rupted by noises or in the cross talk If it is not wait until the line is satisfactory for correct com munication 1 Raise the level of transmission Do not raise the level above the standard of each country If the communication should be OK at the level beyond the standard it is a...

Page 40: ... the machine reception condition Is FTT sent from the receiver Perform voice communication with the NG caller Check if the line is not inter rupted by noises or in the cross talk If it is not wait until the line is satisfactory for correct com munication No response after post message is transmitted three times RTN and PIN are received No response after FTT is transmitted No problem on the machine...

Page 41: ...e Decrease the RX speed Does an error lines exist on received document RTN is transmitted PIN is transmitted to PRI Q PIN is transmitted Try again Perform communication test us ing the LOOP simulator and check the machine reception condition Is the data facsimiled correctly Modem test TEST CODE NO 554 Turn ON the FAX monitor func tion and have the receiver in question transmit the data again Does ...

Page 42: ...IME is expired Is the data facsimiled correctly Modem test TEST CODE NO 554 Confirm if the receiver s FAX machine was set to receivable mode Turn ON the FAX monitor func tion and have the receiver in question transmit the data again Is communication OK Is FAX signal sound heard after the image data is received YES End YES YES NO NO NO 9 6 1 ...

Page 43: ...t the poll mode again and perform polling Ask the service section of the receiver s FAX machine for ex amination Confirm if a mechanical trouble occurred e g the caller inter rupted the transmission Was it a mechanical error as mentioned above Have the caller transmit the data again Ask the service section of the caller s FAX machine for exami nation Check the hardware of the pe ripherals of the m...

Page 44: ...eivable mode and communi cate again Check if the line is not inter rupted by noises or in the cross talk If it is no wait until the line is satisfactory for correct com munication Ask the caller to transmit the data again Confirm if a mechanical trouble occurred e g the receiver inter rupted the reception DCN responds to post message DCN is received after FTT transmission No response at the other ...

Page 45: ... error as mentioned above Ask the receiver to set the Poll mode again and perform polling Perform communication test us ing the LOOP simulator and check the machine reception condition Is carrier cut Modem test TEST CODE NO 554 Ask the service section of the receiver s FAX machine for ex amination Carrier is cut when image signal is received Polling is not possible NO YES NO 6 1 16 YES 15 ...

Page 46: ...of function written in service manual by dial keypad And presses set The customer s unit receives the service value He hears Pii Pii double short beeps 7 Then he can repeat from step 5 8 When a technician wishes to end the REMOTE PROGRAMMING MODE he says to the customer Please press the STOP button to exit the REMOTE PROGRAMMING MODE And then press the SP Phone button Note 1 To enter the REMOTE PR...

Page 47: ... STOP key and press the SP PHONE button END Enter the REMOTE PROGRAMMING ID 9 0 0 0 REMOTE PROGRAMMING MODE Piiii SETTING THE FUNCTION Pii Pii Press 3 digits code of service function and then press set Press 1 3 digits value of func tion and then press set SERVICE SETTING MODE Piiii Press mistaken key Pii Pii Pii START ...

Page 48: ...on time set TEL ring count Set Value mm dd yy hh mm 1 ERROR 2 ON 3 OFF 1 EXT TAM 2 FAX 1 to 4 rings 1 TEL 2 TEL FAX 1 to 4 rings 1 ON 2 OFF 1 OUT 2 IN 1 ON 2 OFF 1 ON 2 OFF ON OFF ON OFF 3 to 6 rings 0 OFF 1 A 2 B 3 C 4 D NORMAL DARKER 1 ON 2 OFF ON OFF 1 ON 2 OFF ON OFF YES NO 001 600 100msec 01 99 10msec 1 10 2 20pps 1 2100 2 1100Hz 1 ON 2 OFF 1 ON 2 OFF 1 ON 2 OFF 01 99 step START push START pu...

Page 49: ...ransmit journal report Transmit service list Remote setting OK OK OK OK OK OK OK OK OK OK OK OK OK OK OK OK OK OK NG OK NG OK OK OK OK Default 05 045 All 75ms 1st 100 10 10 50 5 9600bps 9600bps ON ON ON 350msec 20S 35sec NORMAL Code 590 591 592 593 594 595 596 700 701 702 717 718 719 721 722 732 763 771 815 844 909 991 992 994 999 Set Value 00 99 001 999 1 OFF 2 ALL 3 AUTO 1 75 2 500 3 1s 1 1st 2 ...

Page 50: ...check from most basic things to work What is most basic to work 1 POWER SUPPLY 5V 24V 2 SOLDERING of ICs 3 OSCILLATOR CLK SYSTEM CLK 24MHz MODEM CLK 24MHz 4 RESET 5 SIGNALS ADDRESS BUS A0 A15 DATA BUS D0 D7 READ WRITE RD WR CS Chip select ROMCS MDMCS Board doesn t work means that board has any problems in these most basic things This document is going to explaining the order of repair with flow ch...

Page 51: ...rocesses to display some letters 12 00 AM on LCD If processes were not complete black square will be on the LCD 1 POWER ON If defective is in the power line LCD doesn t change 2 OSC 3 RESET 4 Read the data in the ROM program start 5 Make peripherals initial black square black square black square black square LCD 12 00 AM Monitoring KEY IN LCD LCD LCD LCD LCD NG NG NG NG NG ...

Page 52: ... and take bottom cover off RESET volatge not 5V 5V Check the voltge of testing points Refer to next page Check detail Refer to page 58 Is pin 101 of ASIC 5V like a wave form below RESET is fixed at 5V BE CAREFUL This is the TEST with AC power on LCD LCD Black squares or any charactor come Power ON Oscilloscope GND AC 3 PROCEDURE FROM OUR EXPERIENCE TO FIX ...

Page 53: ... 56 pin 60 0v 0v 5v 5v 0v 5v 0v 5v 0v 0v 0v 0v SRAM IC3 MODEM IC11 OPE PANEL IC301 IC3 IC1 pin 48 IC11 pin 95 pin 116 RA1 RA2 Change the Cordless Base unit P C B IC1 pin 14 17 pin 20 R79 R86 0v 5v 5v Thermal Head TEMP R47 R49 C37 C39 IC1 pin 38 pin 49 Note If the thermal head temperature is abnormal CALL SERVICE will appear in the dispaly Please check soldering and conduction of these components I...

Page 54: ... at CN1 between pin 6 and 4 pin is 5V 2 24V line at CN1 between pin 2 and 3 pin is 24V 1 CHECKING DETAIL Please check the soldering first it comes from our experience Checking soldering Check soldering Refer to page 67 Visual check soldering OSC wave form Refer to page 59 Check wave form on the ICs and BUS line Refer to page 60 Replace IC Checking soldering SYS CLK pin 96 of IC1 12 MHz Big ICs and...

Page 55: ...24 MHz 5v 5v Check reset voltage 5v power on pin 101of IC1 ASIC NG NG 4 3msec reset time apx 175msec This wave form means another problem it is not caused by RESET circuit Please see the item CHECK WAVE FORM 0v power line 5V RESET 24 MHz MODEM CLK pin 70 of MODEM IC11 This point is 1 2 the MHz of the MODEM CLK 12MHz 24 MHz SYSTEM CLK pin 96 of ASIC IC1 This point is 1 2 the MHz of the SYSTEM CLK 1...

Page 56: ...active because address or data is confused by any problem on Address Data bus Check bus line Address to SRAM or MODEM may unsuceed Address to SRAM or MODEM may unsuceed Refer to pages 63 65 Check operation panel I F Check the lines that connect to CN5 from ASIC IC1 If no problem on the lines replace ASIC IC1 Refer to pages 63 65 RESET is no problem NO short circuit open voltage Refer to page 61 Re...

Page 57: ...2 V T 21 25µs 1 T 47 06kHz V 4 8 V W1 500ns W2 5µs Position W1 7 25µs W2 25 00µs Time Time Base Roll Off Time Base External Internal Internal 40 0V 7 25µs 12 25µs Time div 10 0V H1 W1 A0 D0 ROMCS RD OK Let s observe the wave form to fix the defective IC Please observe A0 D0 ROMCE RD by using digital oscilloscope Below graph show you the wave form that is observed when unit board is working correct...

Page 58: ...500ns div Length 100 W2 5µs div Length 1k Sampling Normal 20Msps Marker 1 T 9 65µs V 4 7 V Marker 2 T 7 50µs V 4 9 V T 2 15µs 1 T 465 1k Hz V 0 2 V W1 500µs W2 5µs Position W1 6 20µs W2 25 00µs Time Time Base Roll Off Time Base External Internal Internal 39 9V 6 20µs 11 20µs Time div 10 0V H1 W1 A0 D0 ROMCS RD NG Trigger CH1 2 MEM1 MEM2 Too long CH1 5V div CH2 5V div CH3 5V div CH4 5V div W1 1ms d...

Page 59: ...W2 5µs Position W1 2083 20µs W2 25 10µs Time Time Base Roll Off Time Base External Internal Internal 40 0V 2083 20µs 2133 20µs Time div 10 0V H1 W1 A0 D0 ROMCS MDMCS OK Trigger CH1 2 MEM1 MEM2 CH1 5V div CH2 5V div CH3 5V div CH4 5V div W1 5µs div Length 1k W2 5µs div Length 1k Sampling Normal 20Msps Marker 1 T 2376 70µs V 0 4 V Marker 2 T 7 50µs V 5 0 V T 2369 20µs 1 T 422 1 Hz V 4 6 V W1 5µs W2 ...

Page 60: ... when MODEM doesn t work Oscillation is not intentionally supplied to MDM Please compare OK form to NG form MDMCS pin 54 of IC11 signal is coming many times more than good wave form In the case of this wave form MODEM doesn t work If soldering conductance is no problem we need to replace MODEM IC11 CH1 5V div CH2 5V div CH3 5V div CH4 5V div W1 5µs div Length 1k W2 5µs div Length 1k Sampling Norma...

Page 61: ...rker 1 T 1372 40µs V 5 0 V Marker 2 T 7 50µs V 0 2 V T 1364 90µs 1 T 732 7 Hz V 4 8 V W1 5µs W2 5µs Position W1 1347 40µs W2 25 10µs Time Time Base Roll Off Time Base External Internal Internal Trigger CH1 2 MEM1 MEM2 40 0V 1347 40µs 1397 40µs Time div 10 0V H1 W1 A0 D0 ROMCS SRAMCS NG Like clock CH1 5V div CH2 5V div CH3 5V div CH4 5V div W1 2µs div Length 400 W2 5µs div Length 1k Sampling Normal...

Page 62: ...e a good looking outward In order words outward gloss brightness form is important for soldering So we should do visual inspection A basis of soldering is skirt Smooth skirt is shaped by surface tension as melting cream solder in reflow machine or lifting P C Board from DIP Section of Soldering Skirt skirt Leaded parts SMT QFP SOP parts ASIC MDM SRAM SMT PLCC parts CODEC Chip parts Resistor array ...

Page 63: ... cold soldering cold soldering cold soldering RESISTOR ARRY RA cold soldering CHIP PARTS section COLD nu welded SOLDERING SHORTED SOLDERING LEADED PARTS section SMT PARTS shorted SMT PARTS LEADED PARTS CHIP PARTS shorted section shorted ...

Page 64: ...s unit We usually check the signal flow with the circuit schematic If defect is only one item we check only one of the signal routes Maybe something is defective on that route If there is more than one defect you need to check some of the routes At first you should check the area where there are common components on these signal routes Please see the check sheet next page ...

Page 65: ...572 C518 IC502 21 20 C568 R569 IC502 19 17 R570 C522 IC502 16 13 R571 R573 R574 IC502 11 10 C537 R581 R582 VR502 CN502 10 RF UNIT CN301 10 R358 R310 TX VCO R359 C312 R360 IC301 4 2 C309 C308 Q302 C305 Q301 C303 FL301 C354 C392 L306 ANTTENA PORTABLE HANDSET L406 C492 C491 L419 FL402 L420 Q404 C422 Q403 C428 IC401 23 13 FL403 Q405 C438 IC402 16 3 FL404 IC402 5 9 R432 R435 VR202 C235 R224 R223 IC202 ...

Page 66: ...and search for the point on the route between 44 pins of IC11 and the telephone jack Where the signal disappears Check the components at that point Is the Bell detection circuit OK Does a ring tone signal appear at 44 pins of IC11 digital board Following the ITS section and search for the point on the route between the modem and the speaker where the signal disappears Check the components at that ...

Page 67: ... modem input and refer to the TAM INTERFACE SECTION See the CHECK SHEET and SCHEMATIC Check the VOX circuit and refer to the TAM INTERFACE SECTION See the CHECK SHEET and SCHEMATIC Hint You can monitor the VOX signal on service mode 815 When a VOX sound is detected Vx will be shown on the LCD Check VOX circuit and refer to the TAM INTERFACE SECTION See the CHECK SHEET and SCHEMATIC Wait 1 Not arri...

Page 68: ... melt again It has not been repaired The cause exists same where else Because of circuit compostion If 24V is not output don t output In most cases our experience the symptom is that nothing is output There is a high possibility in the primary side more than the secondary side 5V 5 24 5V 4 25Ω 2W 1200Ω 1W 5V 5 24 5V 4 AC INPUT Input circuit Rectifier circuit Converting circuit Q101 24V output circ...

Page 69: ...ure comes from our experience of troubleshooting in our lab ƒ Before turning on the power supply you should check F101 ls F101 open YES Replace F101 D101 is short YES Replace D101 NO D G Q101 short NO YES Replace Q101 D104 R107 R114 R121 and IC101 Next Page Replace Q101 D S Q101 short S G Q101 short YES NO YES Replace Q101 NO NO ...

Page 70: ...tput OK 5V output OK 5V check Replace D201 Replace D203 Replace Q201 Replace IC202 Replace D204 5V check DC DC converter check 5V check DC DC converter check 5V check DC DC converter check NO YES D201 short YES NO YES NO NO YES Replace D202 PC101and IC201 YES NO Replace the whole board It is difficult to fix by testing other parts Replace peripheral circuit of IC202 ...

Page 71: ...e all of the parts listed as follows F101 Q101 D104 R107 R114 R121 IC101 IC101 Occasionally it exists as the sole case of a broken IC101 You should exchange D201 If D201 is broken the oscillation circuit of the power supply cannot operate Check it with an electric tester D202 Occasionally this part short circuits In this case you can listen to the click sound of intermittent oscillation Check the ...

Page 72: ...tion Is the Key always pressed Check disconnection of CN5 digital board or CN301 operation board Is the disconnection of the cable and connector between the LCD and Operation board OK YES NO Replace the LCD Check IC301 Repair Check IC301 operation board Repair the keys YES NO NG ...

Page 73: ...level Replace IC301 Check the voltage at pin 15 of IC301 Document set 4 5V No document 0V When the pin 9 of IC301 is low level Check the voltage at pin 31 of IC151 Open cover 4 5V Close cover 0V Replace IC301 Replace IC151 NG Check the soldering at R271 Check the soldering at R272 Replace SW271 Replace PI302 Replace PI301 Check the soldering at R332 Check the soldering at R331 OK Check the solderi...

Page 74: ...aper 0V Out of recording paper 4 5V Check the soldering at R275 Check the soldering at R276 Replace IC151 Replace SW273 5 Check the jam sensor SW272 Check the voltage at pin 7 of IC151 jam 0V No jam 4 5V Check the soldering at R273 Check the soldering at R274 Replace IC151 Replace SW272 NG NG OK OK OK OK OK OK ...

Page 75: ...mp of the read section light Service code 555 Check the connection between CN7 and LED lamp Is the voltage at pin 1 of CN7 24V Replace LED lamp Next page Is the voltage at pin 62 or IC1 4 5V Is the voltage at pin 16 of IC7 0 6 7V Check IC1 or re place IC1 Replace IC7 Check the pattern between IC7 and CN7 Repair the connection END NO NO NO NO YES YES YES YES NO NG NG OK OK OK B ...

Page 76: ...ck the amplitude at pins 2 5 of CN6 4 5 Vp p Is the voltage at pin 1 of CN6 5 V Check the waveform of CCD and read section Refer to page 82 Check CCD board Refer to page 81 Check the solder at pins 50 53 of IC1 Replace IC1 Check power supply section Refer to page 72 YES NO YES NO NG OK OK B ...

Page 77: ...rd 4 5 Vp p Check the waveform at pin 7 of CN801 CCD board Refer to page 83 Check the waveform at pin 1 of IC801 CCD board Refer to page 83 Check the short at pins 2 5 of CN801 CCD board Check R830 Replace Q801 Q802 Q803 CCD board or perform CCD adjust Check R830 Replace IC1 Replace R830 CCD board Replace IC801 CCD board Check the solder at pins 50 53 of IC1 Digital board YES NO NG NG NG NG OK OK ...

Page 78: ...Oscilloscope setting V CH1 0 5 V div CH2 5 V div DC couple CHOP mode H 1 msec div Trigger CH2 SLOPE Probe point GND Test point AG CH1 Test point VID CH2 Test point FTG Waveform CH1 CCD signal ACH2 FTG GATE signal trigger Note This waveform will be shown when the CCD reads the white plate of document cover ...

Page 79: ...ING GUIDE about 0 6Vp p about 1 0Vp p about 1 5V 1 5V 0 5 V div AC couple 0 5 V div AC couple 1 V div DC couple GND 3 1 3 2 4 No CH1 probe point 3 1 IC801 pin 1 CCD Board 3 2 CN801 pin 7 CCD Board 4 IC1 pin 39 AMON Digital board ...

Page 80: ...8 of CN251 Check R47 R48 R49 C37 C38 and C39 Replace the thermal head Check IC1 Check the voltage at pin 38 of IC1 3 V 0 V 2V 65 about 2 6V 25 Take out CN11 and check the amplitude again Take out CN11 and check the amplitude again Check the solde at pins 22 25 28 of IC1 or re place IC1 Digital Board Is the amplitude at pins 1 3 of CN11 4 5 Vp p Check the cable of CN11 and CN301 Power unit Check th...

Page 81: ...harge circuit Refer to page 173 Is the voltage of pin 34 of MPU 4 1 V Check around MPU IC501 resolding Is pin 14 of MPU 4 9 V Does the MPU clock oscillate Is pin 9 of MPU HIGH Check around LED Check battery Check Reset Line MPU IC501 9pin YES YES Check the contact between the battery pack and the Portable handset YES Is the voltage at cathode of Diode D13 D11 about 5 4 V Note When charge after rem...

Page 82: ...on factor become 5 5 kHz Devi when 19 dBm is input to the portable handset microphone terminal Is there an output waveform on the collector of Q19 YES Is there an output waveform at pin 24 of IC1 NO NO NO Does the modulation factor become 2 7 kHz deviation when 30 dBm is input to the base unit Is there an output waveform at pin 6 of CN501 Is there an output waveform at pin 24 of IC502 Check RF uni...

Page 83: ...e handset in cordless base unit link OK Charge portable handset in another OK cordless base unit link OK 1 YES YES PORTABLE HANDSET NG Set the test mode CORDLESS BASE UNIT NG Set the test mode NO YES YES YES YES YES YES YES NO NO NO NO NO NO Link condition 2 Analysis of defect locations Set the test mode Base Unit Approx 5V Handset Approx 4V High level Base Unit IC502 pin 48 Handset IC1 pin 48 Bas...

Page 84: ...X high page 87 A G NO YES YES Check VRX signal line Base Unit Approx 5V Handset Approx 4V High level TX VCO voltage Base Unit 1 5V 1V Handset 1 5V 1V Check RX VCO voltage and VRX signal NO Check RX VCO circuit Check RST SI CPS and LD signal lines RX VCO voltage OK RF unit VRX high page 87 C YES TX VCO voltage Base Unit 1 5V 1V see pages 110 112 Handset 1 5V 1V see pages 107 109 Check TX VCO voltag...

Page 85: ... J YES Check microcomputer data sending line NO RF unit pin 6 MOD signal data waveform OK page 87 E K Check cordless base unit IC502 pin 25 and portable handset IC1 pin 25 YES Check RX data line NO RX data signal OK Cordless base unit IC502 pin 3 Portable handset IC1 pin 3 page 87 F L Check cordless base unit IC502 peripheral circuits Check portable handset IC1 cordless base unit Q503 IC502 pins 5...

Page 86: ...ck around Q2 Check around battery IC6 and IC4 NO Check around NOISE AMP IC1 Is pin 19 of CPU IC6 HIGH Check RF part IC1 and Q15 resolding Check around NOISE AMP IC1 NO Check around IC6 Check around CPU IC6 Is the data waveform input to pin 14 of CPU during charging Check around pins 38 41 of CPU IC6 Is signal output to pin 3 of IC1 collector when the data signal is sent from the base unit Does pin...

Page 87: ... Q509 and IC501 Check RF unit Check around IC502 Check around IC501 Check around the IC501 Check around NOISE AMP IC502 NO Is pin 68 of IC501 HIGH Check RF unit Is the ID data output from CONT terminal during charging Check around NOISE AMP IC502 Does the IN USE flash when the INTERCOM key is pressed Is there data output of the base unit from IC501 Check pin 27 30 of IC501 Does pin 68 of IC501 bec...

Page 88: ...are accessed by entering their code changing the appropriate value then pressing the SET key The test Functions are accessed by entering their code and pressing the key listed on the menu While programming to cancel any entry press the STOP key 4 2 OPERATION FLOW Programming User mode user programmable Service mode not user programmable 2 SET mode 1 TEST mode Normal Special 3 SET mode 4 SET mode 5...

Page 89: ... TROUBLESHOOTING GUIDE 4 3 USER MODE The list below is an example of the SYSTEM SETUP LIST the unit prints out BASIC FEATURE LIST Note The above values are default Code ADVANCED FEATURE LIST Set Value Code Set Value ...

Page 90: ... 1 ON 2 OFF Setting of return to default mode 1 ON 2 OFF Setting of reception equalizer 1 ON 2 OFF 520 521 522 523 When ADF function is improper adjust feed position 8 step 1mm Press START COPY SET Press START COPY SET To monitor the line signal with the unit s speaker during FAX communication or not START press START press START press START press START press Selects the jam detection of document ...

Page 91: ...irst dialing 5 times 045 sec Sets the interval of FAX redial during FAX communication ALL 75 msec Sets the interval between the CED signal and subsequent 300 bps signal Lets you select the CNG output during FAX transmission ALL CNG is output at phase A AUTO CNG is output only when the automatic dialing is per formed OFF CNG is not output at phase A Sets the recognizing format of DIS signal 1 Detec...

Page 92: ... 1 2 1 35 sec 2 60 sec 732 AUTO disconnect 763 CNG detect time 771 T1 timer 1 350 ms 2 1 8 sec 3 OFF 1 10 sec 2 20 sec 3 30 sec 1 2 ON Selects the tone detection mode after redialing 722 Redial tone detect 1 ON 2 OFF 1 2 ON 721 Pause tone detect Selects the tone detection in the pauses of the dialing 1 ON 2 OFF START press 815 Sensor check Use this feature when you need to transmit and copy a docu...

Page 93: ...inds of FAX signals to check the sending function of the modem 1 1100 Hz Consecutive signal of EOM for tonal 2 2100 Hz G2 carrier signal Consecutive of CED signal 3 G3 V29 training signal modulation wave of carrier signal 1700 Hz 5 5 4 START Service Mode MODEM TEST Service Mode MOTOR TEST LCD CHECK Service Mode SCAN CHECK Service Mode Turn on the LEDs of the image sensor and operate the read syste...

Page 94: ...osition Sensor at the read Position Co Cover Open Sensor Cover open Ja Jam Sensor Jam Pa Recording Paper Sensor Set Recording Paper Vx Vox Sensor Vox detected Cu Cutter Position SW Home Position Service Mode CUTTER TEST Check the cutter operation 5 6 2 START Service Mode SENSOR CHECK any key Code Button Name 02 03 04 05 07 08 0A 0B 0C 5 6 7 8 9 0 REDIAL PAUSE Code Button Name 35 36 37 38 39 3A 3B ...

Page 95: ... VOLTS output available 6 High Frequency Attenuator 10dB or greater 7 Corded Telephone 8 High Frequency Cable BNC end to open end 9 Audio Cable BNC end to alligator clip end 10 High Frequency Adjustment Tool 11 Isolation Capacitors quantity of 2 10 µF maximum 50V DC or greater 12 Soldering Iron solder and various tools 1 TABLE OF TEST EQUIPMENTS AND TOOL No Test Equipment and Jig Name Jig No Oscil...

Page 96: ...3 Close the front lid by gently pressing down on both ends 3 CONFIRMATION OF SEPARATION SPRING 1 Open the operation grille 2 Check the highest level of the separation spring with the spring height tool PFZZ2F780M Please make sure that the separation spring does not touch the tool during this operation Both right and left See Fig 1 3 Check the lowest level of the separation spring with the opposite...

Page 97: ...d Part No PQZZ8K18Z Refer to next page 5 Connect between LED array and digital board with extension cord Part No PQZZ2K12Z Refer to next page 6 Connect AC cord 7 Press the MENU button 8 Press the 9 0 0 0 and buttons 9 Press the 5 5 and 5 buttons Notes 1 Install the lens so that the marking RED on it is upper side 2 Do not touch the glass face of the lens with the bare hands 3 If you have no instru...

Page 98: ...below 3 Fix the lens fixing screw and CCD board fixing screw Oscilloscope setting CH1 0 5 V div CH2 2 V div TIME 1 ms Trigger CH2 Mode AC CN7 CN6 FIG AG AMON VID DIGITAL BORAD OSCILLOSCOPE CH1 CH2 To point FTG To point VID Extension cord Part No PQZZ2K12Z To LED array for CCD Unit Extension Cord Part No PQZZ8K18Z To CCD baord Never connect land AMON Lens fixing screws CCD board fixing screws MAX f...

Page 99: ...arting position of reading shifts 1 mm as number of changes WHITE LEVEL ADJUSTMENT 1 Remove the CCD TOOL from CCD unit 2 Attach the white paper on the CCD unit 3 Attach the CCD TOOL on the CCD unit 4 Adjust VR801 on the CCD board so that the waveform becomes 1 0 0 2V Notes 1 After the adjustment is finished assemble the unit by reversing above procedure 2 Please adjust with covering topside of the...

Page 100: ...R L Reverse Make sure the position of L and R Tape Tape 2 1 2 The edge of glass and chart should be put togeter then fix with tape for white level adjustment LED Array Side edge of the glass for lens and CCD read position adjustment ...

Page 101: ...sting one specific variable hardware component Each Item lists the equipment needed how to connect and setup the equipment how to make the adjustment and how to verify the adjustment if necessary Before the actual procedure you will find a procedure detailing how to place that part in TEST mode You will have to perform this procedure before each individual Adjustment Item Once aligned please remov...

Page 102: ...d L Output level of signal generator less than 4dBµV 1 6 µV 109 dBm 12 8MHz Transmitter Confirmation Connect the frequency counter between the TP1 and GND and confirm that the frequency is 12 8 MHz and that Vp p is approximately 900 mV TX power Confirmation I 0 1 Procedure Place the voltmeter probe at TP3 Confirm that TP3 s voltagen is whthin 1 5 V Place the voltmeter probe at TP2 Confirm that TP2...

Page 103: ... 109 KX F910BX ADJUSTMENT RF Unit Component View TPA TP1 TP2 TP3 GND VC201 PORTABLE HANDSET REFERENCE DRAWING ...

Page 104: ... 1 PREPARATION Please prepare the CORDLESS BASE UNIT before performing any adjustment procedures Refer to the CORDLESS BASE UNIT REFERENCE DRAWING for connection and test point locations 1 Remove the 3 screws on the bottom cabinet of the handset cradle 2 Remove the bottom cabinet of the handset cradle 3 Remove the soldering on the antenna wires of the RF module 4 Remove the base unit anchoring scr...

Page 105: ...Output 4 ADJUSTMENT PROCEDURE Connect a modulation meter and signal generator 814 0125 MHz 60 dBµV unmodulation in TPA and GND Connect the AF oscillator f 1 kHz 30 dBm to the telephone line output Adjust VR504 to set the modulation to 2 7 0 1 kHz E Standard Modulation While reduced level of S S G level when distortion of telephone line sending is 9 1 Adjust VR501 in such a way that the letter C fl...

Page 106: ...NCE DRAWING CONNECTION CORDLESS BASE UNIT P C BOARD KX FX910BX ANT LINE Component View TPA TP1 TP2 TP3 GND VC201 VR502 VR503 VR501 VR504 Voltmeter Modulation Meter Frequency Counter Syhthesized Signal Generator Loop Simulator Distortion Meter ...

Page 107: ...SS BASE UNIT BOARD CHARGE BOARD RF UNIT CONNECTOR Ref No 1 Procedure 1 HOW TO REMOVE THE PORTABLE HANDSET CRADLE CAB CORDLESS BASE UNIT BOARD AND RF UNIT 1 Remove the 3 screws A 2 Remove the handset cradle cabinet 3 Remove the 2 connectors 4 Remove the 2 screws A and pull up the RF unit ...

Page 108: ...en button in the direction of the arrow to open the operation block 2 Pull both sides of the arms See Fig A 3 Pull up the operation block Ref No 1 Procedure 2 HOW TO REMOVE THE OPERATION BLOCK 1 Set the both arms on the boss as showing in following Fig B 2 Push the operation block down HOW TO ATTACH THE OPERATION BLOCK ...

Page 109: ...CONNECTOR OPERATION BOARD OPERATION BOARD COVER B A CONNECTOR Ref No 3 Procedure 2 3 HOW TO REMOVE THE OPERATION BOARD AND LCD 1 Remove the 6 screws A and the operation block cover 2 Remove the 2 screws B 3 Pull out the 1 connector and remove the 1 flexible connector 4 Remove the operation board 5 Remove the LCD ...

Page 110: ... 4 5 HOW TO REMOVE THE ANALOG DIGITAL BOARDS SPEAKER AND MIC 1 Remove the 3 screws A 2 Remove the analog board 3 Remove the 2 connectors 4 Remove the 7 connectors 5 Remove the 1 screws B 6 Remove the digital board 7 Remove the 1 screw C 8 Remove the speaker 9 Remove the MIC B A A BOTTOM FRAME A B C SPEAKER ANALOG BOARD MIC CONNECTORS CONNECTORS DIGITAL BOARD ...

Page 111: ... the 4 screws A and remove the power supply board 2 Remove the 1 screw B 3 Remove the 2 connectors 4 Remove the AC inlet A MOTOR BLOCK Ref No 7 Procedure 4 10 7 HOW TO REMOVE THE MOTOR BLOCK 1 Remove the paper cutter See Ref No 10 2 Remove the 2 screws A 3 Remove the motor block A A B POWER SUPPLY BOARD CONNECTOR CONNECTOR ...

Page 112: ...LLERS 1 Remove the motor block See Ref No 7 2 Remove the stopper with minus screwdriver 3 Remove the rollers 4 Remove the gear and stoppers from roller shaft and replace roller A CCD UNIT HOW TO CLEAN Clean the glass of CCD unit with cloth soaked in alcohol STOPPER DOCUMENT FEED ROLLER SEPARAION ROLLER STOPPER STOPPER GEAR STOPPER STOPPER DOCUMENT FEED ROLLER ...

Page 113: ...e the paper cutter block 6 Remove the cutter guide 7 Replace the paper cutter 8 Remove the stopper with minus screwdriver small size as showing in following Fig B 9 Remove the recording paper roller Ref No 10 Procedure 10 HOW TO REMOVE THE CUTTER BLOCK HOW TO CLEAN Clean the roller with cloth soaked in alcohol A PAPER GUIDE FRONT LID OPEN BUTTON Screwdriver Fig A 1 2 Fig B STOPPER MINUS DRIVER CUT...

Page 114: ... KX F910BX RECORDING PAPER COVER ARM ARM 2 1 3 Fig A Ref No 11 Procedure 10 11 HOW TO REMOVE THE RECODING PAPER COVER 1 Pull out the both arms as showing in following Fig A 2 Remove the recoding paper cover ...

Page 115: ... ROLLER 1 Remove the thermal head block 2 Pull out the 2 connectors 3 Remove the 2 screws A of thermal head to remove the guides 4 Replace the thermal head HOW TO CLEAN Clean the printing surface of thermal head with cloth soaked in alcohol THERMAL HEAD BLOCK CONNECTORS THERMAL HEAD GUIDE A A GUIDE ...

Page 116: ... 124 KX F910BX Ref No 13 Procedure 13 HOW TO REMOVE THE DOCUMENT TRAY 1 Push the installing section in the direction of the arrow to remove the document tray 2 1 DOCUMENT TRAY ...

Page 117: ...ection of the arrow 2 Remove the 2 screws A A Remove the bottom cabinet using a flathead screwdiver Ref No 15 Procedure 14 15 HOW TO REMOVE THE ANTENNA AND PORTABLE HANDSET BOARD 1 Remove the 1 screw A 2 Pull up the Antenna BATTERY COVER A Remove the Portable Handset Board Please use a thick cloth to prevent scratching the cabinet A A BOTTOM CABINET 1 2 ...

Page 118: ...DGE 1 Re solder slightly on bridged portion 2 Remove remaining solder along pins using soldering iron as shown in below figure Soldering iron bridge Specified solder Flux Temporary soldering point PREPARATION ESOLDER Sparkle Solder 115A 1 115B 1 OR Almit Solder KR 19 KR 19RMA E Soldering iron Recommended power consumption will be between 30 W to 40 W Temperature of Copper Rod 662 50 F 350 10 An ex...

Page 119: ... THLAT THDAT A B NA NB COM RX MOTOR TX MOTOR AIN DG FTG FR F2 F1 5VD DG CCD BOARD 24V LED LED ARRAY RESET KRXD KTXD KSCLK KLATCH KSTART DG 5V NC FG RS R W E D4 D5 D6 D7 VSS VDD VO LCD COG OPERATION BOARD DIGITAL BOARD ANALOG BOARD A B NA NB COM 1 2 1 2 3 4 5 6 7 8 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 THER CN1 CN7 CN6 CN10 CN9 CN5 CN11 CUTPOS 1 2 CN8 SENSOR GND THPON 24V GND1 ...

Page 120: ...n and demodulation for FAX 5 Read section Composed of the LED array light source CCD image sensor to read transmitting documents 6 Thermal Head Contains heating elements for dot matrix image printing 7 Motor driver IC7 IC8 Drivers the transmission motor and the reception motor 8 Reset circuit IC9 Provides reset pulse to each of the major IC s 9 Analog board Composed of ITS circuit and NCU circuit ...

Page 121: ...R ANTI CURL TX MOTOR IC11 MODEM TONE1 T2 BEL TONE2 AC 24V 5V IC7 CPU ASIC T7D56 BACK UP VCC ADDRESS BUS DATA BUS TXOUT 24MHz RXIN A D IMAGE PROCESSING DC DC CONVERTER ANALOG P C B IC201 T101 VR VR VR IC201 5V IC202 MODRX 1 CN152 13 4 30 27 22 7 11 16 15 V O L 4 V O L 3 V O L 2 V O L 1 IC109 SP Phone IC TMU RMU 77 78 TONE1 TONE2 CTL DATA ADDRESS ANT 63 59 67 73 75 71 40 9 61 IC151 CROSS POINT G A D...

Page 122: ...s the recorded data to the thermal head 8 TX MOTOR I F Controls the transmission motor which feeds the document 9 RX MOTOR I F Controls the receiving motor which feeds the reading document 10 OPERATION PANEL I F Serial interface with Operation Panel 11 I O PORT I O Port Interface Exa Sensor etc 2 ROM IC2 This 128 KB ROM EPROM or MASKROM has 32 KB of common area and bank area BK4 BK15 The capacity ...

Page 123: ...RT KLATCH KSCLK KTXD KRXD HEAD CTL XWDERR RD WR XRESETIN A 0 17 D 0 7 CCD CTL ASIC IC1 32 768KHz 24MHz TMO 3 TXE RMO 3 RXE IC7 TX MOTOR DRIVER RX MOTOR DRIVER IC8 TO TXM TO OPE PANEL TO RXM RESET T2 BELL TONE 1 THPON CCLK CSI CSO CBUSY1 CBUSY2 RX TX WR RD D0 4 A0 RXIN TXOUT WR RD D0 7 A0 4 MODEM IC11 TO ANALOG SRAM IC3 A0 17 D0 7 RD WR 3 1 BLOCK DIAGRAM ...

Page 124: ...er fluctuation Circuit Diagram Timing Chart about 175 ms 4 3 4 2 4 2 0 8 4 3 0 8 5 about 175 ms 2 When pin 3 of the IC9 becomes low level it will prohibit the RAM IC3 from changing data The RAM IC3 go into the backup mode when it is backed up by the lithium battery 3 The watch dog timer built in the gate array IC1 is initialized about every 1 5 ms When the watch dog error occurs pin 104 of the gat...

Page 125: ...back up by the lithium battery 2 Circuit Operation When the power switch is turned ON thus supplying the power through the IC9 to the RAM IC3 and RTC At this time the voltage at pin 28 of the RAM and pin 43 of the RTC are 5 V When the power switch is turned OFF the BATT supplies the power to the RAM and RTC through the J1 R76 and IC9 At the time the voltage at pin 28 of the RAM and pin 43 of the R...

Page 126: ...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 printing density and prevent the head from being overheated A A B C B C 28 27 26 25 22 24 23 49 38 STB1 STB2 STB3 STB4 THDAT THCLK THLAT ADSEL1 AIN2 IC1 C39 C38 R49 R48 R47 C37 TH HEAD 5V 0V 0V Effective signal ref LEVEL CLAM...

Page 127: ...LED OFF 0V LED ON IC1 62 IOP26 IC7 16 1 Circuit Diagram 3 5 LED ARRAY The LED ARRAY will light during transmission and copying as a light source to recognize document characters patterns or graph ics on a document It is also possible to light the LED ARRAY in the test mode ...

Page 128: ... way of routes 4 and 5 they are stored in RAM 4 White Black data stored as above description 3 by way of routes 6 and 8 it is inputted to P S converter White Black data converted to serial data in P S converter is inputted to Thermal Head by way of route 9 and it is printed out on recording paper Note Standard Read 3 85 times mm Fine Read 7 7 times mm Super Fine Read 15 4 times mm Transmission 1 S...

Page 129: ...10BX IC3 RAM IC2 ROM 11 12 SYSTEM BUS MODEM NCU TEL LINE P S CONVERTER THERMAL HEAD CPU RAM IMAGE PROCESSING SECTION A D ANALOG SIGNAL CCD IMAGE SENSOR PROCESSING SECTION IC1 2 1 9 3 7 8 4 5 6 10 13 Block Diagram ...

Page 130: ... shift register become filled with data and a latch pulse is emitted to each IC from IC1 pin 23 THLAT With this latch pulse all the contents of shift registers are latched to the latch registers Thereafter through the addition of strobe from the IC1 pins 25 26 27 28 only dot of location of black 1 among latched data activates driver and current passes to heat emitting body to cause heat emission H...

Page 131: ... 1 3 8 9 7 7 6 5 4 8 9 2 1 3 4 5 6 23 22 24 28 27 26 25 38 C39 R49 R48 C37 C38 THERMISTOR THERMAL HEAD NO 1 NO 2 NO 18 LATCH REGISTER SHIFT REGISTER LATCH REGISTER SHIFT REGISTER 96DOT 96DOT Circuit Diagram 1 THDAT 3 THCLK 2 THLAT 7 STB1 6 STB2 5 STB3 4 STB4 9 216 msec COPY PRINT DATA 3 0µsecX1728 5 184msec NEXT LINE PRINT DATA 3 0µsec 3 0µsec 3 0µsec 3 0µsec about 1 8 msec at 25 C TEMPERATURE OF ...

Page 132: ...rs the image signal processing circuit in ASIC IC1 and then is coverted into a digital data 2 Circuit Operation Start When the START COPY SET button is pressed IC1 pin 62 goes to a high level and IC7 is turned ON which makes CN7 pin 2 go to a low level and the voltage applied to the LED array to turn on the LED F1 F2 FR and FTG signals are output to the CCD board to drive the CCD image sensor Ther...

Page 133: ... output form gate array IC1 causing driver IC7 IC8 to go ON The motor coil is energized sequentially in 2 phase increments which causes a 1 step rotation Rotation of 1 step 0 13mm of recording paper or document paper Timing chart is below Timing Chart Copy FAX Function Mode Drive Phase Pattern Speed STD Fine Half Tone Super Fine STD Fine Half Tone Super Fine Paper Feed 1 2 1 2 1 2 1 2 1 2 1 2 1 2 ...

Page 134: ...C151 6 pin ANALOG becomes high level Signal IC151 6 Pin Set Recording Paper Low level No recording Paper High level Analog Board JAM Sensor SW272 When recording paper is jammed the plate push the switch lever the input signal of IC151 7 pin ANALOG becomes Iow level Usually the plate leaves the switch lever the input signal of IC151 7 pin ANALOG becomes high level PLATE 5V R275 R276 C273 IC151 SW27...

Page 135: ...ion the shelter plate pass the sensor light the phototransistor becomes ON and the input signal of IC301 15pin Operation becomes low level When there is no document at the read position the shelter plate shuts the sensor light the phototransistor becomes OFF and the input signal of IC301 15pin Operation becomes high level When checking this sensor condition IC301 16 pin becomes low level PLATE 5V ...

Page 136: ...er plate shuts the sensor ligh the phototransist or becomes OFF and the input signal of IC301 15 pin Operation becomes high level When there is no document the shelter plate passes the sensor light the phototransistor becomes ON and the input signal of IC301 15 pin Operation becomes low level When checking this sensor condition IC301 9 pin becomes low level 5V 5V R333 R332 15 9 IC301 XLD12 LED10 S...

Page 137: ...fficial scanning line density of 3 85 lines mm for about 3 minutes Methods to suppress redundancy are not used Determined in 1976 Group G3 Method of suppressing redundancy in the image signal prior to modulation is used A 4 size document is sent within about one minute Determined in 1980 Group G4 Transmission is via data network Method is provided for suppressing redundancy in signals prior to tra...

Page 138: ...nt was in fact sent and to check for telephone reservations and or the existence of continuous transmission 5 Facsimile Standard Transmission Time Control Time Image Transmission Time Hold Time Connection Control Mode Terminal Control Mode Facsimile Signal Format Modulation Mode Transmission Speed Redundancy Compression Process Coding Mode Resolution Line Synchronization Signal 1 Line Transmission...

Page 139: ... are as follows Explanation of Signals Control signals are comprised mainly of 8 bit identification signals and the data signals added to them Data signals are added to DIS and DCS signals Signal DIS Digital Identification Signal Identification Signal Format 00000001 Example 6 Explanation of Technology G3 Communication Signals T 30 Binary Process In G3 Facsimile communication this is the procedure...

Page 140: ... capability A4 297 mm Unlimited A4 297 mm and B4 364 mm Invalid Receiver T 4 operation DCS Data signalling rate 2400 bit s V 27 ter 4800 bit s V 27 ter 9600 bit s V 29 7200 bit s V 29 Vertical resolution 7 7 line mm Two dimensional coding Recording width 1728 picture elements along scan line length of 215 mm 1 2432 picture elements along scan line length of 303 mm 1 and 2048 picture elements along...

Page 141: ...mile units conforming to T 3 must have the following capability Index of cooperation IOC 264 Note 1 Standard facsimile units conforming to T 4 must have the following capability Paper length 297 mm Training 1 CFR Confirmation to Receive Training 2 Signal X0100001 Identification Signal Format TCF Training Check Fixed pattern is transmitted to receiving side at speed 2400 to 9600 bps designated by D...

Page 142: ...ural Interrupt EOP PIP Procedural Interrupt Positive Refer to next page X1110100 X0110001 X1011111 X1110010 X1111100 X0110101 Basic Technique of Facsimile Facsimile 4 15 12 16 18 13 4 2 2 3 8 Black White b Part of document c Run length and image signals equivalent to b a Document d Codification of c according to MH formula Run length Code for White Line 00110101 000111 0111 1000 1011 1100 1110 111...

Page 143: ... through the NCU section and enters pin 45 of the modem IC11 The signals that enter pin 45 of the modem IC11 are demodulated in the board to digital image signals then placed on the data bus In this case the image signals from the telephone line are transmitted serially Hence they are placed on the bus in 8 bit units Here internal the equalizer circuit reduces the image signals to the long distanc...

Page 144: ...circuit pulse dial generation cir cuit EXT TAM OFF HOOK detect circuit vox circuit amplifier circuit for line transmission and reception sidetone circuit mul tiplexer circuit etc See below for details Modem IC11 This is used for FAX signal tone modulation DTMF signal transmission ring tone generation and line transmission beep generation The DTMF signal and Beep are placed onto the TX system The r...

Page 145: ... 78 TONE1 TONE2 CTL DATA ADDRESS 35 50 23 22 CLRX 63 59 67 73 75 71 40 9 61 IC151 CROSS POINT G A DC LOOP PC103 EXHOOK 5V 5V DP PC102 5V PC101 L103 VAR1 5V T1 R1 L106 EXT TEL BELL TEL LINE T102 PC105 EXHOOK2 L104 T R POS SA101 SA102 L105 RL101 D101 Q1 SP MUTE 70 38 VOX DET SPEAKER AMP CN241 IC241 SPEAKER 4 8 5 VOX 5V SW272 JAM DETECT 5V SW274 TONE PULSE SW 5V SW271 COVER SW 5V SW273 PAPER SET 5V S...

Page 146: ...IRCUIT 1 Circuit Operation Signal waveform of each section are indicated below Signal low level section input to pin 4 of gate array IC151 are read out at CPU and judged as bell Between Tip and Ring Between PC101 1 and 2 PC101 4 Gate Array IC151 4 TEL LINE PC101 1 2 4 IC151 4 7 4 PULSE DIAL CIRCUIT 1 Circuit Operation In OFF HOOK Condition the photocoupler PC102 pin 2 is low level by IC151 pin 3 a...

Page 147: ...uit consists of EXT TAM OFF HOOK detect circuit Monitor Transformer Multiplexer Amplifier VOX detect circuit In details please refer to page 142 TAM INTERFACE SECTION 7 7 LINE AMPLIFIER AND SIDE TONE CIRCUITS 1 Circuit Operation The reception signal received as output from the line transformer T101 is given as input to R202 C205 to IC201 pin 6 and it is inputted to the reception system at an ampli...

Page 148: ...r control corresponding to the TX signal The comparator receives a TX and RX signals and supplies a DC input to the attenuator control corresponding to the RX signal The attenuator control provides a control signal to the TX and the RX attenuator to switch the appropriate signals ON and OFF The attenuator control also detects the level of the volume control to automatically adjust for changing amb...

Page 149: ...41 4 5 8 Speaker Handset Operation IC11 44 C73 R90 IC10 6 7 CN1 10 CN271 10 C184 R184 IC151 76 41 C154 L154 C74 L153 Speaker 2 Alarm Beep Key tone IC1 86 CN1 11 CN271 11 R185 C186 IC151 77 41 C158 R161 IC151 40 38 R245 C245 IC241 4 5 8 Speaker 3 Bell Signal IC1 85 87 R59 C56 CN2 1 CN272 1 R186 C187 IC151 78 41 C158 R161 R60 C57 IC151 40 38 R245 C245 IC241 4 5 8 Speaker ...

Page 150: ... starts to detect CNG signal When CNG signal is received the unit switches to FAX receiving OPERATION EXPLANATION When there is approximately 5 seconds no sound situation for 20 seconds after being passed 10 seconds the unit switches to FAX receiving During this period it detects CNG signal also When it cannot detect no sound nor CNG it doesn t switch to FAX receiving the unit doesn t catch the li...

Page 151: ... LINE C104 T102 C176 R176 IC151 61 67 R217 C214 IC202 10 11 C217 CN271 9 CN1 9 R97 IC10 2 1 C82 R95 IC11 45 3 VOX VOX circuit detects if there is a signal or voice in the line That s why VOX circuit reacts to OGM of EXT TAM and ICM from the party Signal path TEL LINE C104 T102 C176 R176 IC151 61 70 C291 D290 R296 IC101 6 7 R290 IC151 30 EXT TEL Line VAR1 4 RL101 Normally this relay switches to the...

Page 152: ... MODEM IC11 RX IC202 1 2 10 11 TX C184 73 70 30 67 63 2 4 61 25 32 IC151 G A R176 C176 EXT MONIT BELL 5V 5V 5V To line R104 C103 C102 C101 R120 D151 D152 R188 3 2 1 5 T102 C104 R106 R107 C105 R103 R192 L103 L104 VAR1 PC105 Q271 R191 5V T1 R1 T R POS101 SA101 SA102 L106 L105 R102 RL101 DC LOOP TO EXT TEL TO TEL LINE JJ2 JJ1 EXHOOK2 RLY D271 RL101 VOX PC101 D101 ...

Page 153: ...CH ONE TOUCH ONE TOUCH 1 FLASH 4 7 KSL3 1 2 3 S304 S308 S312 S316 S320 S324 S328 S332 I LED11 LED8 O LOCATOR MEMU XLD 13 INTERCOM S335 S333 RESOLUTION XLD 14 S334 10 OPERATION PANEL The unit consists of LCD Liquid crystal display KEYs and LEDs light emitting diode They are controlled by the Gate Ar ray IC301 and AS IC IC1 On the DIGITAL BOARD Fig a Fig a DIAGRAM Key Matrix IC1 ASIC DIGITAL BOARD O...

Page 154: ...eeds only write ASCII code from the data bus D4 D7 V0 is power supplies for crystal drive R320 R322 are density control resistors Consequently in this set the timing mainly positive clock is generated by the LCD interface circuitry of the gate array IC301 Circuit Diagram Timing Chart DATA R W E DB4 DB7 Density LED 7 IC301 4 pin Normal Dark H L ...

Page 155: ...power to converter circuit Voltage is supplied to control IC s kick on voltage through R102 and R103 Inrush current is limited by thermistor TH101 Converter circuit The converter circuit of this power supply circuit is called fly back converter We explain the operation of this circuit with the simple circuit Input Circuit AC Input Rectifier Circuit Converter Circuit Control Circuit Error Detecting...

Page 156: ... high the ON period of Q101 becomes longer The value of output voltage is Ei Eo Eo Ei SW Q101 T101 D D201 C L VL VL RL 1 d Ts dTs dTs Ts T In the actual circuit the fixed output voltage can be obtained by changing the winding ration of transformer T101 In this converter circuit the duty ratio of ON period and OFF period of the transistor produces output In this power supply the bias winding is als...

Page 157: ...load method for the quick check of power supply output 1 V V Vollage Meter V 2 3 4 5 6 1 2 3 4 5 CN302 6 7 8 V CN301 5V GND 24V Power Supply Board Output range 5V 5 1V 5 5V 5 1V 5 24V 24 5V 4 24V 24 5V 4 22Ω 2W 4 7KΩ 1 2W V ...

Page 158: ...ata ACK R is returned from the Base Unit to it then a communication data TALK is transmitted from the Portable Unit The permitting DATA ACK R from Base Unit to Portable Unit includes the empty channel information stored in Base Unit After transmitting the communication DATA TALK from Portable Unit to Base Unit the channel is used When the TALK button on Portable Unit is pressed during communicatio...

Page 159: ...rom the Portable Unit the Base Unit sends a ring signal DATA Ring then the Portable Unit starts ringing 4 Ports for transmitting and receiving of data Portable Unit transmitting 38 41 Pin receiving 21 Pin Base Unit transmitting 27 30 Pin receiving 73 Pin 5 Wave form of DATA used for cordless transmission and reception The DATA which is transmitted from the Portable Unit to the Base Unit is combina...

Page 160: ... START CHANNEL ID CODE CNT COD SET No COMMAND Parity END 8 bit 20 bit 4 bit 4 bit 8 bit 4 bit Pre data START CHANNEL ID CODE SET No COMMAND Parity END Portable Unit When LINKing from the Portable Unit when becoming STBY to TALK DATA is transmitted in above format The combined portion of DATA 0 and DATA 1 is transmitted in LINK requesting DATA format first Then when LINK OK ACK R DATA is returned f...

Page 161: ...anged by each Dial No And the DATA Delimt is between each Frame as a stop The number of Frame is 2 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Base Unit RX Portable Handset TX Base Unit TX Portable Handset RX 1 000 000 kinds of the security code are available for the model KX T910BX Each time the portable unit is set on the cradle of the base unit for charging the CPU automatically change t...

Page 162: ...CONVERTER MAIN CHARGE Spare CHARGE CN501 24V RESET 24 DOWN S DATA C S DATA F CLK BUSY F BUSY C ENABL X501 RF UNIT IC504 Q501 5V 12V Q502 LD CPS SI RST TXB RXB TXP MOD AF 3 99MHz Q509 Q510 Q511 Q512 Q513 12V 13 27 30 17 73 18 68 74 40 72 63 65 64 35 33 34 9 26 43 44 45 46 51 52 25 66 67 14 7 8 C TXPWR ENABL TX DATA TX MUTE RX DATA RX MUTE FLS30 SCLED MCLED OSC1 OSC2 FLS20 Beep PLTX RESET STOPC MCHG...

Page 163: ...HZ 1stIFAMP BUFFER 2nd LO OSC 2nd Mix 455kHz Filter Buffer IC204 Detector LD CLK RST DATA TXB RXB TX POWER B BPF F203 Q202 RF POWER AMP RF POWER AMP IC203 BUFFER X201 12 8MHZ RX VCO VCO202 LOOP FILTER LOOP FILTER REFERENCE OSC PLL BLOCK TX MOD GND RX freq 814 0125MHZ 814 9875MHZ TX freq 904 0125MHZ 904 9875MHZ TX VCO VCO201 IC202 ...

Page 164: ...and it is supplied to the portable handset via the charging pin of Q509 In the same way when the spare battery is inserted into the charging stand Q512 is turned ON and the charging information is supplied to MPU pin 33 When both the portable handset and spare battery are to be charged the MPU outputs a logical low signal from pin 35 which turns Q513 OFF and also turns Q511 OFF thereby limiting th...

Page 165: ...fier Q509 and the charge terminal the data is sent to the portable handset 4 RX Data Circuit The AF output from the RF unit is amplified by Q503 and demodulated into a date signal by pins 35 36 5 4 and 3 of IC502 The result is then supplied to pin 73 of IC503 as the reception data signal LIMIT COMP LPF 24 22 21 20 18 15 13 11 10 9 CN502 RF MOD VR503 R531 C521 C523 R535 C524 C525 R532 R533 R534 C52...

Page 166: ...mpared each other the control voltage is supplied to the VCO circuit from pins 7 and 18 so that the desired TX and RX frequencies are provided The VCO control signal TX RX fre quency setting of the PLL circuit is supplied to CPS pin 15 SI pin 16 and RST pin 17 from the CPU circuit Also the locked oscillation frequency of the VCO circuit is supplied to the CPU from pin 14 at L 13 5 CIRCUIT OPERATIO...

Page 167: ... 21 4 MHz IF signal becomes an element of the 7 5 kHz band width by the MCF F201 and is supplied to IF amplifier Q201 The signal is supplied to IF IC204 The second local frequency is 20 945MHz The frequency is converted here into the 455kHz second IF frequency It is detected inside the IC204 and it appears at pin 11 as the demodulation audio signal Circuit Diagram IC201 1 2 24 23 TXO NC MixIN MixR...

Page 168: ...The received signal is attenuated by the band pass filter F203 except its received frequency band Then it is supplied to the antenna without having any influence on the Receiver RF circuit 3 2 1 6 5 4 GND GND IN OUT GND Vcc IC203 C249 C251 R233 R234 C250 L207 Q202 C253 F203 RX ANT L209 C255 C256 L214 C257 L208 L213 3 2 1 6 5 4 GND GND IN OUT GND Vcc IC202 C213 L206 R232 C212 R208 C210 R206 C211 ...

Page 169: ...ATA ID CHARGE STOPC VC VA POWER SW C RINGER AMP MIC AMP Noise AMP Q14 TXPB TXB Q17 IC8 Q16 IC3 3 0V Reg RXB 3 0V Reg Ni cd BATT SP MIC SP MUTE VC VA RESET DATA AMP LPF SP AMP ALC COMP HPF LPF EXP LPF IC1 Squelch MIC MUTE RXB TXB TXPB AF GND PLL RST PLL SI PLL CLK PLL LD DIAL KEY 1 2 3 4 5 6 7 8 9 0 Auto program Flash Redial pause TALK A B MOD LIMIT 37 16 48 38 41 46 21 47 10 26 23 5 22 31 24 25 14...

Page 170: ...926 3875MHZ 1stIFAMP BUFFER 2nd LO OSC 2nd Mix 455kHz Filter Buffer IC204 Detector LD CLK RST DATA TXB RXB TX POWER B BPF F203 Q204 RF POWER AMP RF POWER AMP IC203 BUFFER X201 12 8MHZ RX VCO VCO202 LOOP FILTER LOOP FILTER REFERENCE OSC PLL BLOCK TX MOD GND RX freq 904 0125MHZ 904 9875MHZ TX freq 814 0125MHZ 814 9875MHZ TX VCO VCO201 IC202 ...

Page 171: ...ectric Field Detection Circuit The electric field detection circuit that consists of the DET Amp IC1 s noise filter integration circuit and comparator detects the electric filed by checking noise The audio signal output from pin of CN1 extracts noise of approx 18 kHz by the noise filter of IC1 after it is amplified by the DET amplifier After the noise is converted to the De voltage in the integrat...

Page 172: ...g functions when it is set to ON while the SP is on If SP muting mode is se lected Q1 functions when it is set to OFF Therefore the CPU controls pin 47 when HIGH is output with the SP on and LOW is output during muting mode Circuit Diagram Circuit Diagram 3 Data Reception Circuit The RX Data circuit consists of the HPF LPF and Data Amp The received RX data is output to pin 56 of IC1 as the audio s...

Page 173: ...to the Mixer circuit in IC1 The Mixer circuit mixes the TX data from the CPU with the transmitted voice signal however Mic Mute mode is ac tivated during TX data transmission Finally the Mixer output flows through the LPF of 4 kHz cut off frequency and it is output from pin 24 then sent to the RF modulator Circuit Diagram Mic R174 C76 R177 Mic Amp R175 C38 C80 Q19 R176 ALC Amp 9 10 R178 C34 R27 11...

Page 174: ... a low pulse to the CPU Each output of Q6 and Q7 is the charging detection signal which the CPU uses when the power switch is on and off Q2 receives the ID data that the base unit sends during charging and transmits it to the CPU Battery recharging is carried out by the power supply from the diode bridge via R71 and R72 Circuit Diagram CPU IC6 RXB 3 V R155 R211 R210 R180 97 1 5 Vcc AVcc Batt Low 8...

Page 175: ...ge measurements are taken with oscilloscope or tester from ground 2 The schematic diagram and circuit board may be modified at any time with the development of new technology Important safety notice Components identified by mark have special characteristics important for safety When replacing any of these components use only manufacturer s specified parts ...

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Page 210: ...6165SB PQVIM64084AF 1 12 24 13 25 32 1 8 9 16 17 24 PQVITC4069UBF 8 14 7 1 PQVIDBL5018 MN151233KZAB 1 8 16 9 49 64 1 16 17 32 33 48 B E C G D S B E C PQVTDTC114EU PQVTDTC144E PQVTDTC143E PQVTDTA143EU PQVTD123J106 PQVTDTB123E PQVTD123T146 PQVTDTC144TU 2SB970A 2SD1819A 2SD601R 2SC4571R77 2SC4226R24 2SC4227R34 2SC4116 PQVTFS10KM10 G S D PQVIXCC3501P PQVIXC3002PR PQVIXCC3202P 1 2 3 PFVIFA5317P PFVINJ2...

Page 211: ...ode Anode E C B E C B Cathode Anode 2SA1627 2SC4604 2SC2235 PFVD2KBP08M PQVDS1ZB40F1 MA6D49 PQVDAK04A PQVDS5688G PQVDERA1802 PQVDERA81004 PFVDAG01A MA165 MA4220 MA4180 MA7200 RLS71 MA110 MA4075 PQVDHZS2B1 1SS131 1SS119 MA2300 MA2S111 MA8047 PQVDRB751H4 PQVDPY1112H PQVDBR1112H PQVDSLR325MC PQVDSR325CA47 MA3062 PQVDSB703Q 2SK2101 ...

Page 212: ... 207 KX F910BX TOOLS EC1 EC2 EC3 PCB3 PCB5 PCB1 PCB2 PCB6 1 PCB6 PCB8 EC4 EC5 EC6 EC7 EC9 EC10 EC11 EC14 EC12 EC13 EC8 EC15 EC16 EC17 ...

Page 213: ... 208 KX F910BX CABINET MECHANICAL AND ELECTRICAL PARTS LOCATION 1 Operation Panel Section 1 1 1 1 2 5 6 7 8 9 11 12 A A PCB3 13 14 15 16 16 1 17 18 19 20 21 22 23 24 2 2 10 3 4 A A ...

Page 214: ... 44 43 43 47 48 49 48 51 52 53 52 56 57 58 57 60 60 1 61 62 62 1 64 Note Attach the pad plate to the top of the cutter unit as shown above 65 66 66 1 67 68 69 70 45 55 50 59 54 46 A B A A A O O A J J J A 75 73 63 72 E601 PCB6 1 PCB6 PCB8 71 74 76 A8 ...

Page 215: ...104 105 106 107 108 147 109 112 110 111 111 113 114 115 131 132 133 121 135 136 137 138 139 140 PCB5 PCB1 PCB2 141 142 143 144 145 145 145 145 134 146 116 117 118 119 120 121 122123 124125 126 127 128 129 130 A A A A A A A C E E G A A A A A A H F D ...

Page 216: ... F910BX 4 CCD Section 171 170 170 1 172 173 174 174 175 176 177 177 177 177 180 177 177 178 179 PCB4 I I A N N LED ARRAY CCD CHASSIS 2 1 A A POINT Note Place the LED Array in the center of point as shown above ...

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Page 218: ...SIZE OF SCREWS AND WASHER M B A D F H J K L C I E XYC3 CF6 G XYN2 C8 XTW3 W6P XTW3 S10P XSN3 W6FZ XSB4 6 XWC4B PJHE5065Z XYN3 F10 XTB3 12G XTW3 CS12P XTB26 8J XTW26 12F Part No Figure N P O Q XTB3 10G XTN3 8G XTN26 6J XWC26BFN ...

Page 219: ... 214 KX F910BX P4 P2 P1 P4 P5 P3 A3 A4 A5 A2 A6 P6 A1 A8 A7 ACCESSORIES AND PACKING MATERIALS Note The rechargeable Ni Cd battery KX A43BX are available through sales route of Panasoic ...

Page 220: ... REVET HEADER PIN 1 ECQ Type ECQG ECSZ Type Others 62 PFYC3F900M CUTTER LOWER GUIDE ASS Y 1 ECQV Type 62 1 PFHX1098Z SPACER CUTTER SHEET 1 1H 50V 05 50V 0F 3 15V 0J 6 3V 1V 35V 63 PFJT1001Y BATTERY CHARGE TERMINAL 2 2A 100V 1 100V 1A 10V 1A 10V 50 1H 50V 64 PFUG1006Z GUIDE CUTTER 1 2E 250V 2 200V 1V 35V 1C 16V 1J 63V 65 PFKS1006Z2 TRAY DOCUMENT 1 2H 500V 0J 6 3V 1E 25 25V 2A 100V 66 PFYC1F910BX RO...

Page 221: ...PER 1 140 PQJP03S07Z CONNECTOR AC IN LET 1 141 PQJS02Q59Y CONNECTOR 2 PIN 1 DIGITAL BOARD PARTS 142 PFUS1040Z SPRING EARTH 1 143 PFUS1017Y SPRING STATIC ELECTRIC 1 PCB1 PFWP1F910BX DIGITAL P C BOARD ASS Y RTL 1 144 PFDG1007Z GEAR IDLER 1 145 PFHA1001Z RUBBER LEGS 4 146 PFGT1157Z NAME PLATE 1 147 PFUS1043Z SPRING COVER OPEN SENSOR 1 ICS IC1 PFVIT7D56 IC 1 IC2 PFWIF910BX IC 1 4 CCD SECTION IC3 PQVIC...

Page 222: ...T COIL S 1 R40 PQ4R10XJ393 39K 1 R81 PQLQR2BT COIL S 1 R41 PQ4R10XJ563 56K 1 R82 PQLQR2BT COIL S 1 R42 PQ4R10XJ562 5 6K 1 R83 PQLQR2BT COIL S 1 R43 PQ4R10XJ821 820 1 R84 PQLQR2BT COIL S 1 R44 ERD25TJ222 2 2K 1 R45 PQ4R10XJ821 820 1 R46 ERD25TJ222 2 2K 1 R47 PQ4R10XJ223 22K 1 R48 PQ4R10XJ563 56K 1 R49 PQ4R10XJ473 47K 1 CRYSTAL OSCILLATIONS R50 PQ4R10XJ101 100 1 X1 PQVCJ2400N5Z CRYSTAL OSCILLATOR 1 ...

Page 223: ...D 0 1 S 1 C95 PQCUV1E104MD 0 1 S 1 C11 ECEA1CKS100 10 S 1 C13 ECUV1H101JCV 100P 1 C14 ECUV1H101JCV 100P 1 C15 ECUV1H101JCV 100P 1 C16 ECUV1H101JCV 100P 1 C17 ECUV1H101JCV 100P 1 C18 ECUV1H101JCV 100P 1 C19 ECUV1H101JCV 100P 1 C31 PQCUV1H220JC 22P 1 C32 PQCUV1H220JC 22P 1 ANALOG BOARD PARTS C33 ECEA1CK101 100 S 1 C34 ECEA0JK221 220 S 1 PCB2 PFWP3F910BX ANALOG P C BOARD ASS Y RTL 1 C35 PQCUV1E104MD ...

Page 224: ... R109 PQ4R10XJ104 100K 1 CN271 PQJS11A10Z CONNECTOR 11 PIN 1 CN272 PQJS11A10Z CONNECTOR 11 PIN 1 R111 PQ4R10XJ472 4 7K 1 CN273 PQJS07A10Z CONNECTOR 7 PIN R112 PQ4R10XJ393 39K 1 R113 PQ4R10XJ103 10K 1 R114 PQ4R10XJ682 6 8K 1 R115 PQ4R10XJ822 8 2K 1 SWITCHES R116 ERDS2TJ5R6 5 6 1 R117 PQ4R10XJ123 12K 1 SW271 PFSH1A02Z SWITCH SENSOR 1 R118 PQ4R10XJ562 5 6K 1 SW272 PFSH1A02Z SWITCH SENSOR 1 SW273 PFSH...

Page 225: ...189 ERJ3GEYJ155 1 5M 1 J250 PQ4R10XJ000 JUMPER 0 1 J252 PQ4R10XJ000 JUMPER 0 1 R190 PQ4R10XJ105 1M 1 R191 ERDS2TJ102 1K 1 J270 ERJ3GEY0R00 JUMPER 0 1 R192 PQ4R18XJ101 100 1 J271 ERJ3GEY0R00 JUMPER 0 1 J272 ERJ3GEY0R00 JUMPER 0 1 R201 ERJ3GEYJ102 1K 1 J273 ERJ3GEY0R00 JUMPER 0 1 R202 ERJ3GEYJ563 56K 1 J274 ERJ3GEY0R00 JUMPER 0 1 R203 ERJ3GEYJ223 22K 1 J275 ERJ3GEY0R00 JUMPER 0 1 R204 ERJ3GEYJ563 56...

Page 226: ...ECUV1C104KBV 0 1 1 C278 PQCUV1C334ZF 0 33 1 C279 ECUV1H330JCV 33P 1 C161 PQCUV1H105JC 1 S 1 C162 PQCUV1H105JC 1 S 1 C290 ECUV1C104KBV 0 1 1 C166 PQCUV1H105JC 1 S 1 C291 ECUV1H103KBV 0 01 1 C171 PQCUV1H105JC 1 S 1 C172 ECEA0JKS101 100 1 C173 ECUV1C104KBV 0 1 1 C174 ERJ3GEY0R00 JUMPER 0 1 C176 ECUV1C473KBV 0 047 1 C177 ECUV1H101JCV 100P 1 C178 ECEA0JKS101 100 1 C179 ECUV1C104KBV 0 1 1 C180 ECUV1H331...

Page 227: ...PQ4R10XJ181 180 1 S312 PQSH1A105Z SWITCH ONE TOUCH S 1 R339 PQ4R10XJ181 180 1 S313 PQSH1A105Z SWITCH VOLUME S 1 S314 PQSH1A105Z SWITCH DIAL 3 S 1 R340 PQ4R10XJ181 180 1 S315 PQSH1A105Z SWITCH DIAL 2 S 1 R341 PQ4R10XJ181 180 1 S316 PQSH1A105Z SWITCH DIAL 1 S 1 S317 PQSH1A105Z SWITCH SP PHONE S 1 R350 PQ4R10XJ181 180 1 S318 PQSH1A105Z SWITCH MUTE S 1 R351 PQ4R10XJ181 180 1 S319 PQSH1A105Z SWITCH RED...

Page 228: ...E SI S 1 D201 MA6D49 DIODE SI S 1 D203 PQVDERA81004 DIODE SI 1 RESISTORS D204 MA4075M DIODE SI S 1 D205 MA165 DIODE SI S 1 R801 PQ4R10XJ202 2K 1 R802 PQ4R10XJ202 2K 1 R803 PQ4R10XJ100 10 1 R804 PQ4R10XJ242 2 4K 1 R805 PQ4R10XJ272 2 7K 1 CONNECTORS R806 PQ4R10XJ242 2 4K 1 R807 PQ4R10XJ272 2 7K 1 CN31 PQJP2D98Z CONNECTOR 2 PIN 1 R808 PQ4R10XJ471 470 1 CN301 PQJP6G100Z CONNECTOR 6 PIN 1 R809 PQ4R10XJ...

Page 229: ...2K 1 R104 ERG2SJ104 100 1 R105 ERX2SJR22 0 22 1 R106 ERDS2FJ100 10 1 R107 ERDS2FJ100 10 1 R108 ERDS2FJ150 15 1 R109 ERDS1SJ470 47 1 R121 PQ4R10XJ103 10K 1 CORDLESS BASE BOARD PARTS R122 PQ4R10XJ471 470 1 R123 PQ4R10XJ182 1 8K 1 PCB6 PFLP1071BXZ CORDLESS BASE P C BOARD 1 R124 PQ4R10XJ181 180 1 ASS Y RTL R125 PQ4R10XJ101 100 1 R126 PQ4R10XJ562 5 6K 1 R127 PQ4R10XJ222 2 2K 1 R201 ERG1SJR33 0 33 1 ICS...

Page 230: ...180K 1 L511 PQLQXH152J COIL 1 R540 PQ4R10XJ102 1K 1 L512 PQLQR1KT COIL 1 R541 PQ4R10XJ104 100K 1 R542 PQ4R10XJ104 100K 1 L502 PQLQR1KT COIL 1 R543 PQ4R10XJ272 2 7K 1 L503 PQLQR1KT COIL 1 R544 PQ4R10XJ274 270K 1 L504 PQLQR1KT COIL 1 L505 PQLQR1KT COIL 1 R551 PQ4R10XJ153 15K 1 L506 PQLQR1KT COIL 1 R552 PQ4R10XJ000 JUMPER 0 1 L507 PQLQR1KT COIL 1 R553 PQ4R10XJ332 3 3K 1 L508 PQLQR1KT COIL 1 R561 PQ4R...

Page 231: ...Q4R10XJ104 100K 1 C560 PQCUV1H151JC 150P 1 R658 PQ4R10XJ103 10K 1 C561 ECEA1CKS221 220 S 1 R659 PQ4R10XJ562 5 6K 1 C562 PQCUV1H103KB 0 01 1 C563 PQCUV1H103KB 0 01 1 R661 ERDS2TJ221 220 1 C564 PQCUV1H330JC 33P 1 R662 ERDS2TJ221 220 1 C565 PQCUV1H330JC 33P 1 R663 ERDS1TJ560 56 1 C566 PQCUV1E104MD 0 1 S 1 R664 ERDS1TJ101 100 1 C567 PQCUV1E104MD 0 1 S 1 R665 PQ4R10XJ123 12K 1 C568 PQCUV1E104MD 0 1 S 1...

Page 232: ...9 ERJ3GEYJ470 47 1 L205 MQLRE5N6JF COIL 1 L206 MQLRE5N6JF COIL 1 R230 ERJ3GEYJ823 82k 1 L207 MQLRE8N2JF COIL 1 R231 ERJ3GEYJ683 68k 1 L208 MQLRE2N2DF COIL 1 R232 ERJ3GEYJ101 100 1 L209 MQLRE10NJF COIL 1 R233 ERJ3GEYJ100 10 1 L210 ERJ3GEYJ000 Chip Jumper 1 R234 ERJ3GEYJ103 10k 1 L212 MQLRE22NJF COIL 1 R235 ERJ3GEYJ220 22 1 L213 MQLRE10NJF COIL 1 L214 MQLRE22NJF COIL 1 J200 ERJ3GEYJ000 0 1 OSCILLATO...

Page 233: ...CUV1H390JCV 39p 1 OTHERS C257 ECUV1H020CCV 2p 1 CN1 PQJP10B01Z CONNECTOR 10Pin RF 1 L501 PQ4R10XJ100 JUMPER 0 1 E1 PQEFBQM111G3 BUZZER 1 L509 PQ4R10XJ000 JUMPER 0 1 E2 PQJM122Z MICROPHONE 1 L2 ERJ3GEY0R00 Chip Jumper 1 L510 PQ4R10XJ000 JUMPER 0 1 S1 ESD11H120 SWITCH POWER 1 PORTABLE HANDSET BOARD PARTS RESISTORS PCB7 PQWPT9380BXR PORTABLE HANDSET P C BOARD 1 ASS Y RTL R1 ERJ3GEYJ684 680k 1 R2 ERJ3...

Page 234: ...J3GEYJ332 3 3k 1 R158 ERJ3GEY0R00 0 1 R59 ERJ3GEYJ392 3 9k 1 R159 ERJ3GEYJ103 10k 1 R60 ERJ3GEYJ104 100k 1 R160 163 Not Used R61 ERJ3GEYJ102 1k 1 R164 ERJ3GEYJ333 33k 1 R62 ERJ3GEYJ222 2 2k 1 R165 ERJ3GEY0R00 0 1 R63 ERJ3GEYJ334 330k 1 R166 ERJ3GEYJ102 1k 1 R64 ERJ3GEYJ103 10k 1 R167 ERJ3GEYJ562 5 6k 1 R65 ERJ3GEYJ472 4 7k 1 R168 Not Used R66 ERJ3GEYJ124 120k 1 R169 Not Used R67 ERJ3GEYJ474 470k 1...

Page 235: ...1E104ZFV 0 1 S 1 C19 ECUV1H102KBV 1000p 1 C205 249 Not Used C250 PQCUV1C105ZF 1 S 1 C20 PQCUV1C105ZF 1 S 1 C251 PQCUV1E104MD 0 1 1 C21 ECUV1H392KBV 3900p 1 C252 PQCUV1C105ZF 1 S 1 C22 ECST0JX226 22 1 C253 PQCUV1E104MD 0 1 1 C23 PQCUV1E104MD 0 1 1 C254 ECUV1C104KBV 0 1 1 C24 PQCUV1E104MD 0 1 1 C25 ECUV1H103KBV 0 01 S 1 J1 ECUV1H102KBV 1000p 1 C26 PQCUV1H103KB 0 01 S 1 C27 PQCUV1H223MD 0 022 1 C28 E...

Page 236: ...C224 ECUV1H220JCV 22p 1 C225 ECUV1H100DCV 10p 1 RESISTORS C226 PQCUV1C105ZF 1 1 C227 ECUV1H103KBV 0 01 1 R201 ERJ3GEYJ000 0 1 C228 ECUV1C104KBV 0 1 1 R202 ERJ3GEYJ153 15k 1 C229 ECUV1C104KBV 0 1 1 R203 ERJ3GEYJ153 15k 1 R204 ERJ3GEYJ563 56k 1 C230 ECUV1H100DCV 10p 1 R205 ERJ3GEYJ100 10 1 C231 ECUV1H680JCV 68p 1 R206 ERJ3GEYJ000 0 1 C232 ECUV1H180JCV 18p 1 R207 Not Used C233 Not Used R208 ERJ3GEYJ1...

Page 237: ...D 2 PIN 1 EC 3 PFZZ8K23Z EXTENTION CORD 8 PIN 1 EC 4 PQZZ6K14Z EXTENTION CORD 6 PIN 1 EC 5 PQZZ2K13Z EXTENTION CORD 2 PIN 1 EC 6 PQZZ9K7Z EXTENTION CORD 9 PIN 1 EC 7 PQZZ11K8Z EXTENTION CORD 11 PIN 2 EC 8 PQZZ5K6Z EXTENTION CORD 5 PIN 1 EC 9 PFZZ5K13Z EXTENTION CORD 5 PIN 1 EC10 PQZZ2K6Z EXTENTION CORD 2 PIN 1 EC11 PQZZ10K4Z EXTENTION CORD 10 PIN 1 EC12 PQZZ8K18Z EXTENTION CORD 8 PIN 1 EC13 PQZZ2K...

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