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Panasonic KX-F910BX Service Manual

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Summary of Contents for Panasonic KX-F910BX

  • Page 2: Safety Precautions

    KX-F910BX SAFETY PRECAUTIONS 1. Before servicing, unplug the power cord to prevent an electric shock. 2. When replacing parts, use only the manufacturer’s recommended components. 3. Check the condition of the power cord. Replace if wear or damage is evident.

  • Page 3: Battery Caution

    KX-F910BX BATTERY CAUTION CAUTION Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent type recommended by the manufacture. Discard used batteries according to following caution: Disposal of lithium batteries should be performed by permitted, professional disposal firms knowledgeable in state govern- ment federal and local hazardous materials and hazardous waste transportation and disposal requirements.

  • Page 4: Personal Safety Precautions

    KX-F910BX STANDARD BATTERY LIFE 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 EBattery life may vary depending on usage conditions and ambient temperature.

  • Page 5: Specifications

    KX-F910BX SPECIFICATIONS ¡ Main unit 1. Applicable Lines: Public Switched Telephone Network 2. Document Size: Max. 216 mm (8 ) in width Max. 600 mm (23 ) in length 3. Effective Scanning Width: 208 mm(8 4. Printing Paper Size: 216 mm ~ max. 50 m (8 ~ 164’...

  • Page 6: Location Of Controls

    KX-F910BX LOCATION OF CONTROLS Front View Antenna Spare battery cover Document entrance Battery charger Paper stacker (beneath the cover) Charge contacts Document feeder tray Document guide(s) Microphone CHARGE Indicator Front lid open button SPARE CHARGE Indicator Document exit Control panel...
  • Page 7 KX-F910BX Handset Antenna TALK/BATT (Battery) LOW/PROG (Program) Indicator POWER/RINGER Switch TALK Button REDIAL Button TONE Button INTERCOM Button and Indicator PROGRAM Button AUTO Button PAUSE Button FLASH Button Charge Contacts FEATURES General 900MHz Cordless Automatic paper cutter Fax activation from handset...
  • Page 8 KX-F910BX CONNECTION Connect to "LINE" Power cord Telephone line cord Single telephone line (RJ11C) Power outlet (220V, 50/60Hz) Note: For additional equipment protection, we recommend the use of a surge protector. The following types are available; TELESPIKE BLOK MODEL TSB (TRIPPE MFG. CO.), SPIKE BLOK MODEL SK6-0 (TRIPPE MFG.

  • Page 9: Installing The Recording Paper

    KX-F910BX INSTALLATION 1. Installing the recording paper Open the back lid by lifting up the tabs located on the both sides. Install a recording paper roll in the main unit. Make sure that the shiny side of the paper is facing down and there is no stack, tape, or glue residue on the paper roll.
  • Page 10 KX-F910BX 2. Installing the paper stacker Install the paper stacker. Paper stack 3. Installing the antenna on the main unit push down and twist the antenna onto the main unit. Keep the antenna .in an upright position to get the best reception .
  • Page 11 KX-F910BX COMPONENT LOCATIONS Recording Paper Cover Separation Roller Recording Paper Document Thermal Head Feed Roller Recording Paper Roller Target Glass Document Cutter Feed Roller Lens Mirror Transmission Motor Reception Motor LED Array MAINTENANCE ITEM 1. OUTLINE MAINTENANCE AND REPAIRS ARE PERFORMED USING THE FOLLOWING STEPS.
  • Page 12 KX-F910BX 2-1. MAINTENANCE LIST OPERATION CHECK ITEM REMARKS Document Path Remove any foreign matter such as scrap of paper. Rollers If a roller is dirty, clean it with a damp cloth, then let dry thoroughly. See page 16. Recording Paper If the platen is dirty, clean it with a damp cloth, then let dry thoroughly.

  • Page 13: Cleaning The Unit

    KX-F910BX CLEANING THE UNIT Cleaning the inside of the unit If misfeeding occurs frequently, or dirty patterns or black bands appear on a copied or transmitted document, clean the document feeder rollers, sub roller, rubber flap, white plate and glass.

  • Page 14: Troubleshooting Summary

    KX-F910BX 1. TROUBLESHOOTING SUMMARY 1-1. TROUBLESHOOTING After having confirmed the abnormal condition by asking the user, troubleshoot according to the instructions in Observe the following precautions when troubleshooting. 1-2. PRECAUTIONS 1) If there is trouble with the print quality or the paper feed, first check that the installation space and the print paper meets the specifications, that the paper selection lever/paper thickness lever is set correctly, and that the paper is set correctly without any looseness.

  • Page 15: User Recoverable Errors

    KX-F910BX 2. USER RECOVERABLE ERRORS If the unit detects a problem, the following messages will appear in the display. DISPLAY MESSAGE CAUSE AND REMEDY There is something wrong with the unit. CALL SERVICE The back lid is open. Close it.
  • Page 16 KX-F910BX 3. DETAIL OF TROUBLESHOOTING 3-1. OUTLINE Troubleshooting is to make quality and reliability recover by finding out the broken component and exchange or adjustment or cleaning. We have to find out symptoms and then arrange troubleshooting 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"...
  • Page 17 KX-F910BX 3-3. TABLE OF TROUBLESHOOTING ITEMS FUNCTION SYMPTOM SEE THIS PAGE Unit doesn't work at all No character or faint response in the LCD Skewed sending image Page 30 Expanded print Page 30 Image is distored Page 27 Printing Black or White lateral line on printing...
  • Page 18 KX-F910BX 3-4. EASY-CHECK-LIST FUNCTION JUDGEMENT REFERENCE FAX operation transmission OK ^ NG receiving OK ^ NG FINE mode OK ^ NG Copy operation OK ^ NG HALF TONE mode Monitor sound OK ^ NG OK ^ NG Ringer sound Telephone operation...
  • Page 19 KX-F910BX 3-5. ADF (Auto document feed) SECTION (1) No document feed In document setting, confirm that beep tone or not. Check the separation Replace the sen- Check the sensor spring is distorting. sor lever. lever movement. Check the sensor Replace the defec- and digital board.
  • Page 20 KX-F910BX (2) Paper JAM Checks the paper jam for markings or objects stuck on the sheet. Check feed route. Cleaning or replace of defective parts. Cleaning the each rollers. (pages 120 and 121 ) Check each sensors Confirms that the location tip of the read start movement.
  • Page 21 KX-F910BX (3) Multiple feed Confirms whether the pad is dirty or not and Check separation pad. is attached correctly. Cleaning or replace the defective parts. Check the separation spring is distorting. Cleaning the each rollers. (pages 120 and 121) Replace the separation pad, roller and pressure spring.
  • Page 22 KX-F910BX (4) Skew Checks whether the document is folded or tape or staples are attached. Also checks Document setting OK? whether a different size document is set at the same time. Reset document. Checks whether there are same foreign Check feed route.
  • Page 23 KX-F910BX (5) Image is distorted Checks if there are some foreign objects Check feed route. or missing parts. Cleaning or repair the defective parts. Cleaning the each rollers. Check of relapse. (page 120 and 121) Confirms whether the plate strokes smoothly Check white plate.
  • Page 24 KX-F910BX (6) Black or white vertical lines appear. Please copy the test chart. To thermal head section. Is line appear? (page 84) Please the white plate and target glass thoroughly. Cleaning feed route. If the dirt cannot be removed, change the white plate.
  • Page 25 KX-F910BX (7) Can not cut the recording paper. Check the cutter unit. Cleaning the cutter unit. (page 121) Check the each sensor levers movement. Replace the defective parts. Check the each sensor. Replace the defective parts. Test the cutter movement.
  • Page 26 KX-F910BX (8) Skewed sending image Check the setting of Reset the recording paper. recording paper Replace the recording paper roller. (9) Expanded print Check the front lid open Lock the front lid open button locked. button. Cleaning the each rollers.
  • Page 27 KX-F910BX (10) When copying or printing an abnormal sound is heard from the unit. In the document convey Alternant's source? -ance element. (Next page) In the printing section. Remove the exit-guide toward you by hand and confirm if the carriage is moved Confirm the EXIT-GUIDE by hand.
  • Page 28 KX-F910BX Check the drive gear for damage, inserted foreign Confirm the document's objects or abnormal installations. conveyance drive section. Fix clean or change the Does it recur? abnormal part. Do not apply large amounts to other parts. Re-grease (Refer to page 206)
  • Page 29 KX-F910BX 3-6. COMMUNICATION SECTION Communication connection (modem) (Print defect in FAX communication) Symptom Hint General Classification Referring to the printer TEST : If only the print communication is NG and other Print a communication printing is OK, there is a high possibility that there is a problem in the digital board's modem and analog board buss.
  • Page 30 KX-F910BX (1) Defective facsimile section 1 Transmit problem USER STOPPED Message on LCD TX Problem STOP key was pressed? Need to service. No problem Operation panel section. (Refer to page 76) Paper jam? ADF section. Only some of document (Refer to page 23)
  • Page 31 KX-F910BX Message on LCD Transmit Error TX Problem Pre-Feeding of docu- ment? Using auto dial to send? Doesn't start TX (Doesn't start feeding?) Do you press START key Increase "596:Transmit immediately after dialing? level set" from -10 dBm to -5 dBm or some.
  • Page 32 KX-F910BX 2 Receive problem Confirm below before starting troubleshooting. Recording paper is installed properly? RX problem Can RX something anyway? Many errors on image? No: Looks OK Change "718:Receive speed Increase "595: RX error limit select" to 7200, 4800 or 2400 value"...
  • Page 33 KX-F910BX 3 Unit can copy, but can not transmit/receive Connect the unit to the loop simulator. Switch : TX side T-R : Connect oscilloscope Modem test start (TEST CODE NO. 554) Is the four signal at Connect the PBX and Tip-Ring output? TEL.
  • Page 34 KX-F910BX C Unit can copy, but can not transmit/receive long distance or international communication The following 2 causes can be considered for this. Cause 1: The other party is executing automatic calling, the call has been received by this unit, and this time until response with a CED or DIS signal has been too long.
  • Page 35 (2100 Hz), followed by a DIS signal. As here the echo cancelers stops as described in cause B, the echo of the DIS signal returns to FAX2. On the other hand, the KX-F910BX detects the DIS signal and transmits a DCS signal. In other words, it is possible that the echo of the DIS signal and the DCS signal transmitted from the KX-F910BX reach FAX2 one after the other, FAX2 executes erroneous detection, and communication are not started.
  • Page 36 KX-F910BX Summary: Long distance and international communication operation COUNTERMEASURE SYMPTOM 1. The TEL/FAX DELAYED RING count should be 1. (user parameter: code No. 06) 2. If possible, manual transmission should be made from Does not receive in automatic mode. the transmission side.
  • Page 37 KX-F910BX (2) Communication error functions Operation: 1. Press the MENU button 3 times. 2. Press the START/SET button and ¥ button 4 times. 3. Press the START/SET button. 4. Print out. Error code table: Counter- RESULT MODE SYMPTOM CODE measure...
  • Page 38 KX-F910BX 3 Countermeasure Transmission is finished when T1 TIMER is expired. Turn ON the FAX monitor func- tion and transmit the data to the same receiver. Is FAX signal sound (DIS) heard? Is communication OK? Confirm the receiver's FAX machine...
  • Page 39 KX-F910BX FTT is received after transmission of 2400BPS training signal. Perform communication test us- ing the LOOP simulator. Is "Fall back" executed from 9600BPS? Modem test (1) Raise the level of transmission. (Do not (TEST CODE NO.554) raise the level above the standard of each country.
  • Page 40 KX-F910BX No response after post message is transmitted three times. Inquire the receiver if the caller's document is facsimiled correctly. Is the data facsimiled correctly? Ask the service section of the receiver's FAX machine to con- firm the machine condition.
  • Page 41 KX-F910BX No post message Turn ON the FAX monitor func- tion and have the receiver trans- mit the data. Is FAX signal sound (post message) heard after the image data is received? Ask the service section of the sender's FAX machine for ex- amination.
  • Page 42 KX-F910BX Reception is finished when T1 TIME is expired. Perform communication test us- ing the LOOP simulator and check the machine reception condition. Modem test Is the data facsimiled (TEST CODE NO.554) correctly? Turn ON the FAX monitor func- tion and have the receiver in question transmit the data again.
  • Page 43 KX-F910BX DCN is received after transmission of NSC and DTC. Confirm if a mechanical trouble occurred, e.g. transmission was interrupted or document was out of place, on the receiver side (being polled). Was it a mechanical error as mentioned above?
  • Page 44 KX-F910BX DCN is received after FTT transmission. No response at the other party after MCF or CFR is transmitted. DCN is received after CFR transmission. Confirm if a mechanical trouble occurred, e.g. the caller inter- rupted the transmission. Was it mechanical error as...
  • Page 45 KX-F910BX Polling is not possible. Confirm if a mechanical trouble occurred, e.g. transmission was interrupted or document was out of place, on the receiver side (being polled). Was it mechanical error as mentioned above? Ask the receiver to set the Poll Ask the service section of the mode again and perform polling.
  • Page 46 KX-F910BX (3) Remote programming While a user is talking on the phone, a technician can set the function parameters of customer’s unit from service center. 1. A call comes in service center. 2. A technician gets a claim from a customer.
  • Page 47 KX-F910BX 1 Summary of remote programming mode START Customer press STOP key and press the SP-PHONE button. Enter the REMOTE PROGRAMMING ID 9,0,0,0 REMOTE PROGRAMMING MODE "Piiii" Press mistaken key "Pii Press 3 digits code of service Pii Pii" function and then press...
  • Page 48 KX-F910BX A Program mode table Set Value Code Remote setting Default Function mm/dd/yy hh:mm - - - - - Set date and time - - - - - - - - - - Your logo - - - - -...
  • Page 49 KX-F910BX Code Function Set Value Default Remote setting 00~99 FAX auto redial time set FAX auto redial line disconnection time set 001~999 CNG transmit select 1:OFF/2:ALL/3:AUTO Time between CED and 300 bps 1:75/2:500/3:1s 75ms 1:1st/2:2nd Overseas DIS detection select Receive error limit value set...
  • Page 50 KX-F910BX 3-7. DIGITAL BOARD SECTION How to fix the digital board that don't start up the unit. (1) OVER VIEW If you see a human being down on the street, what will you do? You may talk to him. But if he doesn't answer, you check his breath or pulse, don't you.
  • Page 51 KX-F910BX (2) CHECK LCD ON THE MACHINE If the digital board had broken, machine does not react at all and black square will be on the LCD. There are 5 processes to display some letters (12:00 AM) on LCD. If processes were not complete, black square will be on the LCD.
  • Page 52 KX-F910BX (3) PROCEDURE FROM OUR EXPERIENCE TO FIX Power ON plug the AC cord Look at LCD No reaction Check power line (Refer to page 58) Black squares or any charactor come. No reaction means that Power line is broken (short-circuit).
  • Page 53 KX-F910BX Pleas check the status (voltage) of pin 56, pin 58 and pin 60 of IC1. These status may tell you defective point. (Please use the ROM for IC status checked) [Ref No. EC22] Oscilloscope TESTER status (voltage) of check points...
  • Page 54 KX-F910BX (1) CHECKING DETAIL Please check the soldering first, it comes from our experience. Checking soldering Big ICs and resistor arry Check soldering Visual check soldering. (Refer to page 67) RA1, RA2 RA3, RA4 IC11 Checking soldering CPUCLK OSC wave form.
  • Page 55 KX-F910BX (3) OSCILLATOR (CLK) SYSTEM CLK: 24 MHz, MODEM CLK: 24 MHz 24 MHz SYSTEM CLK (pin 96 of ASIC:IC1) 50 nsec/div • This point is the MHz of the SYSTEM CLK 12MHz. 24 MHz MODEM CLK (pin 70 of MODEM:IC11) 50 nsec/div •...
  • Page 56 KX-F910BX (5) CHECK WAVE FORM This check needs 4 channels digital storage oscilloscope higher than 400 MHz. START Check again power line, If still no reaction replace Any wave form on the line . oscillation (12 MHz), ASIC and check again.
  • Page 57 KX-F910BX location name Let's observe the wave form to fix the defective IC. : pin 132 of ASIC (IC1) Please observe A0, D0, ROMCE, RD by using digital oscilloscope. : pin 131 of ASIC (IC1) Below graph show you the wave form that is observed when unit...
  • Page 58 KX-F910BX The graphs below show you the wave form that is observed when unit (board) doesn't work. (A3 is intentionally opened at pin 135 of ASIC in this board.) Please check that active (low level) term of ROMCE is longer than good wave form, **ROMCE is active (low level) except- ing RESET is active.** and RESET is frequently coming on every 4 msec.
  • Page 59 KX-F910BX Please observe A0, D0, ROMCE, MDMCS. Below graph show you the wave form that is observed when unit (board) is working correctly. Both graph are good wave. Trigger CH1/2 MEM1 MEM2 Time/div 5V/div 5µs H1 W1 5V/div 5V/div 10.0V 5µs...
  • Page 60 KX-F910BX The graphs below show you the wave form that is observed 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.
  • Page 61 KX-F910BX Below graph show you the wave form that is observed when SRAM doesn't work. (BUS line at SRAM is intentionally opened.) Please compare OK (under) to NG (upper). SRAMCS (pin 20 of IC3) signal is coming like clock. In the case of this wave form SRAM access doesn't work. If soldering, conductance is no problem, we need to replace SRAM (IC3).
  • Page 62 KX-F910BX (6) CHECK SOLDERING We should check soldering at first. Because many problem are caused by a defective soldering. How to Visual-Check the soldering Defective soldering (shorted, un-welded, oxidized...) doesn't have a good looking outward. In order words outward (gloss, brightness, form) is important for soldering. So we should do visual inspection.
  • Page 63 KX-F910BX COLD (nu-welded) SOLDERING CHIP PARTS (section) SMT PARTS cold soldering cold soldering LEADED PARTS RESISTOR ARRY (section) cold soldering cold soldering SHORTED SOLDERING SMT PARTS shorted LEADED PARTS CHIP PARTS (section) shorted shorted | 67 |...
  • Page 64 KX-F910BX 3-8. ANALOG BOARD SECTION Returns from the customer has 2 of the defects. For example complaint HANDSET transmitting SP-PHONE transmitting How can you repair this 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.
  • Page 65 KX-F910BX CHECK SHEET signal (SYMPTOM) ROUTE O U T ITEMS TO CHECK SP-PHONE Tx MIC- J270-C138-IC109(13-27)-R145-IC151 (75-63)-C203-R210-IC201 (2-1)-C202-R201-T101- TEL LINE SP-PHONE Rx TEL LINE-T101-R202-C205-IC201(6-7)-C210-C173-R172-R173-C174-IC151(59-71)-C142-R143- IC109 (22-30)-C145-IC109 (4-7)-R146-C146-IC151 (40-38)-R245-C245-IC241 (4-5,8)-SPEAKER Portable PORTABLE HANDSET MIC-R283-C214-Q208-C233-R232-IC202(19-17)-C232-R231-IC202(16-13)-R230- Handset Tx R228-R227-IC202(11-10)-C225-R229-VR201-R458-R410-TX VCO-R459-C412-R460-IC401(4-2)- C409-C408-Q402-C405-Q401-L422-FL401-L421-C492-L406-ANTTENA- RF UNIT...
  • Page 66 KX-F910BX (1) Defective ITS (Integrated telephone system) section 1 No speakerphone transmission/reception Following the ITS section or NCU section, search for the route between the microphone and the telephone line (sending) or between the telephone line and the speaker (receiving) where the signal disappears.
  • Page 67 1 Not arriving in TAM, FAX turn on. Is the installed bell ring num- Install a bell ring number of ber of TAM less than that of TAM less than that of KX-F910BX. KX-F910BX? Check the EXT. TAM Hook detection circuit.
  • Page 68 KX-F910BX 3-9. POWER SUPPLY SECTION (1) Key components for troubleshooting The following components have been known to break frequently : F101, D101, Q101, IC101, D201, D202 This comes from our experience of experimental test. For example : power supply, lighting surge voltage test, withstanding voltage test, intentional short circuit test..etc.
  • Page 69 KX-F910BX (2) Troubleshooting flow chart Our recommendation for troubleshooting is as follows. This procedure comes from our experience of troubleshooting in our lab. ƒ Before turning on the power supply, you should check F101. ls F101 open? Replace F101. D101 is short.
  • Page 70 KX-F910BX 5V check 24V output OK? Replace Q201. 5V,check (DC-DC converter check) Replace IC101. 5V output OK? 24V output OK? Replace D203. 5V,check (DC-DC converter check) D201 short? 5V output OK? Replace D201. Replace IC202. 24V output OK? 5V,check 5V output OK?
  • Page 71 KX-F910BX (3) The broken parts repairing details (D101) Check short-circuit of terminal 4. If D101 is short-circuited, F101 will be melted (open). So in this case, replace the 60th parts (D101, F101). (Q101) The worst case of Q101 is a short-circuit between the Drain and Gate because damage expands to IC101.
  • Page 72 KX-F910BX 3-10. OPERATION BOARD SECTION (1) No key operation Repair the keys. Is the Key always pressed? Check disconnection of CN5 Check IC301 (digital board) or CN301 (operation board) (operation board). (2) No LCD indication Is the disconnection of the Repair.
  • Page 73 KX-F910BX 3-11. SENSOR SECTION (1) Check the read position sensor(PI301) Check the voltage at pin 15 of IC301 Check the soldering Check the soldering at R333. at R331. Document set OV When the pin No document 4~5V 16 of IC301 is low level.
  • Page 74 KX-F910BX (4) Check the recording paper sensor (SW273) Check the voltage at pin 6 of IC151 Check the soldering at R275. Check the soldering at R276. Present recording paper: 0V Out of recording paper: 4~5V Replace SW273. Replace IC151. (5) Check the jam sensor (SW272) Check the voltage at pin 7 of IC151 Check the soldering at R274.
  • Page 75 KX-F910BX 3-12. READ SECTION Clean the surface of the glass. Is the glass surface of reading section clean? Perform the scanner test. Copy a document. LED lamp of the read section light? (Service code : 555) Check the connection between CN7 and LED lamp.
  • Page 76 KX-F910BX Is the amplitude at pins 2~5 of CN6 Take out cable from CN6, and 4~5 Vp-p? check the amplitude at pins 2~5 of CN6 (4~5 Vp-p). Is the voltage at pin 1 of CN6 +5 V? Check CCD board.
  • Page 77 KX-F910BX Perform the scanner test. (Refer to page 97) Is the amplitude at pins 2~5 of CN801 (CCD board ) 4~5 Vp-p? Take out CN801 (CCD board), and check the amplitude at pins 2~5 of CN6 (Digital board). (4~5 Vp-p).
  • Page 78 KX-F910BX waveform of read section 1 CCD about 1.0 Vp-p about 1.0 Vp-p CH1 GND 5 Vp-p CH2 GND 2 GATE Oscilloscope setting V: CH1 0.5 V/div 5 V/div DC couple, CHOP mode H: 1 msec / div Trigger: CH2 SLOPE (+) Probe point: GND Test point “AG”...
  • Page 79 KX-F910BX 3 -1 about 0.5 V/div 0.6Vp • AC couple 3 -2 about 0.5 V/div 1.0Vp-p AC couple about 1.5V 1 V/div 1.5V DC couple CH1 probe point 3 -1 IC801 pin 1 (CCD Board) 3 -2 CN801 pin 7 (CCD Board)
  • Page 80 KX-F910BX 3-13. THERMAL HEAD SECTION Is the voltage at pin 8 of CN251. (Analog Board) 0~1 V? (When copying) Is the voltage at pin 119 of IC1 4~5 V? (Digital Is the voltage at pins Board) 5,6 of CN301 23~24 V? (Power unit )
  • Page 81 KX-F910BX 3-14. CORDLESS SECTION (1) Battery won't charge (Cordless Base unit) Plug in the AC power source. Is the voltage of Q510 Is the charge LED lit? Check the collector about charge circuit. 7.0 V? (Refer to page 173) Is the voltage between + and – 12 V?
  • Page 82 KX-F910BX (3) No voice reception Does the modulation factor become 2.7 kHz deviation. when -30 dBm is input to the base unit? Is there an output Check RF waveform on the collector unit, VR202 of Q15 (Portable handset)? and IC202.
  • Page 83 KX-F910BX (5) No link How to check whether the portable handset or the cordless base unit LINK FAILURE Charge another OK portable handset PORTABLE HANDSET NG in cordless base unit; link OK? (Set the test mode) [Refer to item (1) of page 107]...
  • Page 84 KX-F910BX High level Check TX VCO voltage, VTXP signal and VTX signal. Base Unit: Approx 5V Handset: Approx 4V RF unit Check signal line. (VTXP = "high"?) (VTX = "high"?) Check TX VCO circuit. TX VCO voltage OK? TX VCO voltage Check RST.
  • Page 85 KX-F910BX Check 20 dB adjustment value. When signal generator Re-adjust to 20 dB. (see pages 107 ‘ 112) is ON, Base Unit IC502 48 pin="low", Handset IC1 48 pin="low"? Is re-adjustment possible? •Check peripheral circuits of (or "C" mark lights) cordless base unit (Q503, IC502 pins 54, 55) portable handset (Q15, IC1 pins 54, 55).
  • Page 86 KX-F910BX No link (Portable handset TX) Is the data waveform input to Check around Q2. pin 14 of CPU during charging? Does TALK LED(D10) light up Check around when the TALK switch of the battery, IC6 and portable handset is pressed? IC4.
  • Page 87 KX-F910BX No link (Base unit RX) Check Q509 and Is the ID data output from IC501. CONT terminal during charging? Is the data signal output to pin 1 Check RF unit. of RF unit during conversation with the portable handset?

  • Page 88: Programming And Lists

    KX-F910BX 4. PROGRAMMING AND LISTS The programming functions are used to program the various features and functions of the machine, and to test the machine. Programming can be done in both the on-hook and off-hook conditions. This facilitates communication between the user and the service while programming the machine.
  • Page 89 KX-F910BX 4-3. USER MODE (The list below is an example of the SYSTEM SETUP LIST the unit prints out.) BASIC FEATURE LIST Code Set Value ADVANCED FEATURE LIST Code Set Value Note: The above values are default | 93 |...
  • Page 90 KX-F910BX 4-4. SERVICE FUNCTION TABLE Code Function Set Value Remarks Effective Range Default Selects the pause time in 100 Setting of pause time 001 ‘600 ~100 msec 05000 msec 001 ‘ 600 msec step. Selects the line break time during Setting of flash time 01 ‘99 ~10 msec...
  • Page 91 KX-F910BX Code Function Set Value Effective Range Default Remarks Selects the number of times that Setting of number of times 00 ‘99 14 times 00 ‘ 99 ITS is redialed (not including the that ITS is redialed first dialing). Setting of ITS redial interval 001 ‘...
  • Page 92 KX-F910BX Code Function Set Value Effective Range Default Remarks Selects ringer off switch when 1 : ON 1, 2 a call is received in the TEL/ Ringer off in TEL/FAX mode 2 : OFF FAX mode. Selects the tone detection in...

  • Page 93: Test Functions

    KX-F910BX 4-5. SERVICE MODE SETTING VALUES (Example of a printed out list) SERVICE DATA LIST Set Value Code SPECIAL SERVICE SETTING Code Set Value Note: The above values are default 5. TEST FUNCTIONS Code Type of Mode Test mode Function Operation after code input.
  • Page 94 KX-F910BX Output the DTMF by single tone. 5 5 2 DTMF SINGLE Service Mode TEST 1..On 2..Off LED TEST Service Mode All LEDs flashes on and off, or is illuminated. 5 5 7 START Check the operation button. 5 6 1...

  • Page 95: Table Of Test Equipments And Tool

    Radio Tester : Marconi Model 2295A or later. 4.5 digit Digital Multimeter : B&K Model 2833 or compatible. Oscilloscope, single or dual channel : Panasonic VP-5512P100 or compatible. Telephone Analyzer : B&K Model 1050 or compatible. DC Power Supply, capable of supply 3.9V DC at 100mA NOTE : only needed if Telephone Analyzer does not have DC VOLTS output available.

  • Page 96: Adjusting The Feeder Pressure

    KX-F910BX 2. ADJUSTING THE FEEDER PRESSURE If misfeeding of document, such a multiple feeding or no feeding, occurs frequently, try to adjust the feeder pressure by following steps below. (1) Open the front lid by pressing the front lid open.

  • Page 97: Ccd Adjustments

    KX-F910BX 4. CCD ADJUSTMENTS Perform the following adjustment after replacing lens and CCD board. PREPARATION: 1) Remove the CCD unit from set. (Refer to page 120. ) 2) Make oscilloscope connections as shown in next page. 3) Attach the CCD TOOL on the CCD unit.
  • Page 98 KX-F910BX ADJUSTMENT: LENS AND CCD READ POSITION ADJUSTMENT 1) Loosen the lens fixing screw and CCD board fixing screw. 2) Adjust the position of the lens and CCD board so that the waveform appears as shown in the figure below.

  • Page 99: Document Read Start Position Adjustment

    KX-F910BX 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.
  • Page 100 KX-F910BX (for white level adjustment) (for lens and CCD read position adjustment) LED Array Side edge of the glass The edge of glass and chart should be put togeter, then fix with tape. Tape Tape Reverse Make sure the position of L and R.

  • Page 101: Cordless Adjustment

    KX-F910BX 6. CORDLESS ADJUSTMENT 6-1. OBJECTIVE This procedure will enable the technician to make adjustments to the KX-F910BX PORTABLE HANDSET and CORDLESS BASE UNIT. 6-2. GENERAL INFORMATION This procedure has 2 sections. The first section instructs the technician on how to align the PORTABLE HANDSET. We recommend aligning the PORTABLE HANDSET first, since you will need the PORTABLE HANDSET to align the CORDLESS BASE UNIT.
  • Page 102 KX-F910BX (2) ADJUSTMENT PREPARATION Please perform the following procedure before starting the Adjustment Procedure. You only have to perform this procedure only once to complete all Items, but you will have to perform this procedure to make an individual Adjustment Item.
  • Page 103 KX-F910BX PORTABLE HANDSET REFERENCE DRAWING RF Unit (Component View) VC201 | 109 |...
  • Page 104 KX-F910BX CORDLESS BASE UNIT (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. Remove the 3 screws on the bottom cabinet of the handset cradle.
  • Page 105 KX-F910BX (4) ADJUSTMENT PROCEDURE ADJUSTMENT ITEM PROCEDURE DESCRIPTION Place the voltmeter probe at RF unit TP3. Confirm that TP3 's voltage is within Rx VCO Voltage 0.5~2.5V(RF UNIT). Confirmation only Tx VCO Voltage Place the voltmeter probe at TP2. Confirm that TP2 's voltage is within Confirmation only 0.5~2.5V(RF UNIT).
  • Page 106 KX-F910BX CORDLESS BASE UNIT REFERENCE DRAWING CONNECTION LINE Syhthesized Signal Modulation Meter Frequency Counter Generator KX-FX910BX Distortion Meter Loop Simulator Voltmeter CORDLESS BASE UNIT P.C.BOARD (Component View) VC201 VR502 VR503 VR504 VR501 |112 |...
  • Page 107 KX-F910BX Ref. No. 1 HOW TO REMOVE THE PORTABLE HANDSET CRADLE CAB, CORDLESS BASE UNIT BOARD AND RF UNIT Procedure 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 KX-F910BX Ref. No. 1 HOW TO REMOVE THE OPERATION BLOCK Procedure 1) Push the front lid open 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.
  • Page 109 KX-F910BX Ref. No. 3 HOW TO REMOVE THE OPERATION BOARD AND LCD Procedure 1) Remove the 6 screws (A) and the operation block cover. 2 ¤3 2) Remove the 2 screws (B). 3) Pull out the 1 connector and remove the 1 flexible connector.
  • Page 110 KX-F910BX Ref. No. 4 HOW TO REMOVE THE BOTTOM FRAME Procedure 1) Remove the 6 screws (A). 2) Remove the 2 screws (B). 3) Remove the bottom frame. BOTTOM FRAME Ref. No. 5 HOW TO REMOVE THE ANALOG, DIGITAL BOARDS, SPEAKER AND MIC Procedure 1) Remove the 3 screws (A).
  • Page 111 KX-F910BX Ref. No. 6 HOW TO REMOVE THE POWER SUPPLY BOARD AND AC INLET Procedure 1) Remove the 4 screws (A) and remove the power supply board. 4, 6 2) Remove the 1 screw (B). 3) Remove the 2 connectors.
  • Page 112 KX-F910BX Ref. No. 8 HOW TO REMOVE THE CCD UNIT Procedure 1) Remove the 2 screws (A). 4 ¤8 2) Remove the CCD unit. CCD UNIT HOW TO CLEAN: Clean the glass of CCD unit with cloth soaked in alcohol.
  • Page 113 KX-F910BX Ref. No. 10 HOW TO REMOVE THE CUTTER BLOCK Procedure 1) Push the front lid open button in the direction of the arrow to open the operation block. 2) Remove the upper guide. 3) Remove the 2 screws (A).
  • Page 114 KX-F910BX Ref. No. 11 HOW TO REMOVE THE RECODING PAPER COVER Procedure 1) Pull out the both arms as showing in following Fig. A. 10 ¤ 11 2) Remove the recoding paper cover. RECORDING PAPER COVER Fig. A |122 |...
  • Page 115 KX-F910BX Ref. No. 12 HOW TO REMOVE THE THERMAL HEAD ROLLER Procedure 1) Remove the thermal head block. 10 ¤12 2) Pull out the 2 connectors. 3) Remove the 2 screws (A) of thermal head to remove the guides. 4) Replace the thermal head.
  • Page 116 KX-F910BX Ref. No. 13 HOW TO REMOVE THE DOCUMENT TRAY Procedure 1) Push the installing section in the direction of the arrow to remove the document tray. DOCUMENT TRAY |124 |...
  • Page 117 KX-F910BX Ref. No. 14 HOW TO REMOVE THE BOTTOM CABINET OF PORTABLE HANDSET Procedure 1) Remove the battery cover in the direction of the arrow. @Remove the 2 screws (A). ARemove the bottom cabinet using a flathead screwdiver. BOTTOM CABINET...

  • Page 118: How To Replace Flat Package Ic

    KX-F910BX HOW TO REPLACE FLAT PACKAGE IC PREPARATION Sparkle Solder 115A-1, 115B-1 ESOLDER 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 expert may handle 60~80 W iron, but beginner might damage foil by overheating.)

  • Page 119: Connection Diagram

    KX-F910BX 1. CONNECTION DIAGRAM CN271 LED ARRAY THPON TO TEL LINE +24V +24V GND1 Ex. TEL GND2 GND3 CUTPOS SENSOR CN152 MIC+ MIC- SPEAKER +5VD CN241 TONE1 CN272 T2/BEL BOARD CN251 CN10 RESET CN251 MOTOR +5VA RESV +5VD COLK CBUSY1...

  • Page 120: General Block Diagram

    KX-F910BX 2. GENERAL BLOCK DIAGRAM The control section will be explained as shown in the block diagram. ASIC (IC1) ....Composed mainly address decoder, modem control section, CPU and RTC. Control the general FAX operation. Control the operation panel I/F.
  • Page 121 General BLock Diagram (FAX) OPERATION PANEL POWER SUPPLY SENSOR RECTIFIER SW. TRANS +24V DC/DC DOC READ-POSITION CONVERTER CONTROLLER NOISE SW. MOS FILTER KEY MATRIX MOS SW SIRIAL I/F ANALOG P.C.B DIGITAL PCB BACK UP VCC +24V D101 RL101 T101 L105 TEL LINE IC201 –...

  • Page 122: Control Section

    KX-F910BX 3. CONTROL SECTION 1 ASIC (IC1) This custom IC is used for general FAX operation CPU: The KX-F900 uses a Z80 equivalent CPU operating at 12MHz. Many of the peripheral functions are handled by custom designed LSI. As a result, the CPU only needs to process the result.
  • Page 123 ROM(IC2) MODEM(IC11) SRAM(IC3) TO ANALOG TXOUT RXIN THPON PWR ON 24MHz TONE 1 ASIC CCD-CTL F1,F2,FR,FTG,VIDEO T2/BELL (IC1) RESET HEAD-CTL KSTART,KLATCH,KSCLK,KTXD,KRXD XWDERR OPE PANEL STBI-4,THLAT (IC7) HEAD THCLK,THDAT TMO-3,TXE TX MOTOR 32.768KHz 24MHz DRIVER 5V/BATT (IC9) (IC8) RESET RMO-3,RXE RX MOTOR BACK UP DRIVER BATT...
  • Page 124 KX-F910BX 3-2. RESET CIRCUIT The output from pin 3 of the Reset IC (IC9) resets the gate array (IC1), the modem (IC11), the gate array on the operating board (IC301), the Port IC (IC151) on the analog board through the IC1.
  • Page 125 KX-F910BX 3-3. SRAM and RTC BACK UP CIRCUIT (1)Function This unit has a lithium battery (BATT), which works for the RAM (IC3) and Real Time Clock IC (RTC,Integrated into ASIC:IC1). The user parameter of autodial numbers, the transmission ID, the system setup date and so on are stored in the RAM (IC3).
  • Page 126 KX-F910BX 3-4. SUPERVISION CIRCUIT FOR THERMAL HEAD TEMPERATURE (1) Function Thermal head temperature is disposed to convert voltage to digital data by using A/D converter of IC1. The CPU decides the strobe width of the thermal head according to this value. Therefore, this circuit can keep the thermal head at an even temperature in order to stabilize the printing density and prevent the head from being overheated.
  • Page 127 KX-F910BX 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: Facsimile Section

    KX-F910BX 4. FACSIMILE SECTION 4-1. IMAGE DATA FLOW DURING FACSIMILE OPERATION COPY (Fine, Super-Fine, Half Tone) (1) Line information is read by CCD, by way of route 1 , it is inputted to IC1. (2) In IC1, data is adjusted to suitable level for A/D conversion at Analog Signal Processing Section, and by way of route 2 it is inputted to A/D conversion (8 bit).
  • Page 129 KX-F910BX Block Diagram IMAGE SYSTEM SENSOR ANALOG SIGNAL PROCESSING IMAGE SECTION PROCESSING SECTION THERMAL HEAD CONVERTER MODEM TEL.LINE |138 |...
  • Page 130 KX-F910BX 4-2. THERMAL HEAD (1)Function This unit utilizes state of the art thermal printer technology. The recording paper (roll paper) is chemically processed. When the thermal head contacts this paper it emits heat momen tarily, black dots (appearing almost as a point) are printed on the paper. If this point is continued, litters and/or diagrams appear, and the original document is reproduced.
  • Page 131 KX-F910BX Circuit Diagram MAINBOARD SWITCHING POWER SUPPLY BOARD THERMAL HEAD 24V RL201 CN301 +24V D205 TH-POWER 96DOT 96DOT NO.1 NO.2 NO.18 CN11 GATE ARRAY (IC1) THLAT THLAT LATCH REGISTER LATCH REGISTER THDAT THDAT SHIFT REGISTER SHIFT REGISTER THCLK THCLK STB1...
  • Page 132 KX-F910BX 4-3. READ SECTION (1) Function A document is illuminated by the LED array, and the reflections pass through the reduction-projection lens and are im- aged on the CCD image sensor. The document image is photoelectrically transferred by the CCD image sensor, and an analog image signal correspond- ing to one line of the document is continuously output.
  • Page 133 KX-F910BX 4-4. STEPPING MOTOR DRIVE CIRCUIT (1) Function Two individual stepping motors are used for transmission and reception. They feed document or recording paper synchronized for reading or printing. (2) Circuit Operation During motor drive, gate array IC1 pin 77/pin 71 becomes high level, Q2/Q4 are turned ON, and Q1/Q3 go ON as a result, +24 V is supplied to the motor coil.
  • Page 134 KX-F910BX 4-5. SENSORS AND SWITCHES [Recording Paper Sensor (SW273)] When recording paper is present, the plate push the switch lever, the input signal of IC151-6 pin (ANALOG) becomes Iow level. When the set runs out of recording paper, the plate leaves the switch lever, the input signal of IC151-6 pin (ANALOG) becomes high level.
  • Page 135 KX-F910BX [Cover Open Sensor (SW271)] When the upper cabinet is closed, the plate push the switch lever, the input signal of IC151-33pin (ANALOG) becomes low level. When there is opened, the plate leaves the switch lever, the input signal of IC151-33pin (ANALOG) becomes high level.
  • Page 136 KX-F910BX [Document Sensor (PI302)] When a document is set, the shelter 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.

  • Page 137: Modem Section

    KX-F910BX 5. MODEM SECTION 5-1. FUNCTION The unit uses a 1 chip modem (IC11), enabling it to act as an interface between the control section for FAX sending and receiving, and the telephone line. During a sending operation, the digital image signals are modulated and sent to the telephone line, while during a receiving operation, the analog image signals which are received via the telephone line are demodulated and converted into digital image signals.
  • Page 138 KX-F910BX (4) Concerning Transmission of Time Transmission Time = Control Time Image Transmission Time Hold Time Transmission time consists of the following. Control time : This is time at the start of transmission when functions at the sending and receiving sides are confirmed, transmission mode is established, and transmission and reception are synchronized.
  • Page 139 KX-F910BX (6) Explanation of Technology @ G3 Communication Signals (T. 30 Binary Process) In G3 Facsimile communication, this is the procedure for exchange of control signals between the sending and receiving machines both before and after transception of image signals.
  • Page 140 KX-F910BX Bit No. DIS/DTC Reserved for future T.3 operation features Reserved for future T.3 operation features Transmitter - T.4 operation Receiver - T.4 operation Receiver - T.4 operation Data signalling rate Data signalling rate 11, 12 V.27 ter fallback mode 2400 bit/s V.27 ter...
  • Page 141 KX-F910BX Bit No. DIS/DTC Standard setting Extend field Extend field 2400 bit/s handshaking 2400 bit/s handshaking Uncompressed mode Uncompressed mode Error correction mode Error correction mode Frame size 0 = 256 octets Set to “0” 1 = 64 octets Error limiting mode...
  • Page 142 KX-F910BX Signal Identification Signal Format Function Refer to next page. Image Signal Sends 12 bit (0...01 ~ 6 times to receiver at same speed as image signal and notifies of completion of (Return to Control) transmission of first sheet. End of one communication...
  • Page 143 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.
  • Page 144 KX-F910BX 6. EXPLANATION OF ANALOG SECTION BLOCK DIAGRAM (1)Function The analog section serves as interface with the telephone line. The digital board (IC11) for transmission reception of FAX signals, and the speech network IC (IC109) are connected to the NCU section. Switching between the digital board (IC11) and the other sections is executed by means of a multiplexer in the NCU section.
  • Page 145 Analog Unit Block Diagram RL101 D101 T101 L105 TEL LINE IC201 – SA101 LOOP – SA102 PC102 L106 EXHOOK MODRX – IC202 PC101 L103 IC201 PC103 VAR1 L104 CN152 BELL EXHOOK2 IC109 T102 – PC105 SP-Phone IC +24V RL101 LRLY. Q271 VOX DET SW275...

  • Page 146: Ncu Section

    KX-F910BX 7 NCU Section 7-1. GENERAL This section is the interface with the telephone line and external telephone. It is composed of EXT. TEL Line relay (RL101), bell detection circuit, pulse dial circuit, Auto Disconnect circuit, TAM Interface circuit, line amplifier and sidetone circuits and multiplexer.
  • Page 147 KX-F910BX 7-5. AUTO DISCONNECT CIRCUIT (1)Function: This circuit is used to detect the fact that another telephone connected to the same line is OFF-Hook while the unit is in the time of TEL/FAX’s arrival bell ringing operation. (2)Circuit Operation: Tip (Ring) ¤ D101 ¤ Q101 ¤ C107 ¤ D102 ¤ R114 ¤ Q102 ¤ PC103.
  • Page 148 KX-F910BX 8. ITS (Integrated telephone System) and MONITOR SECTION 8-1. GENERAL The general ITS operation is executed by the special IC109. This IC has a speakerphone circuit and a handset circuit in 1 chip, and control to each mode is executed from the outside (IC151). At the time of speakerphone operation the speaker output passes through the power amplifier (IC241).
  • Page 149 KX-F910BX 8-3. MONITOR CIRCUIT (1) DTMF Monitor (Speaker Operation) 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...

  • Page 150: Tam Interface Section

    KX-F910BX 9. TAM INTERFACE SECTION 9-1. FUNCTION In case that EXT. TAM position is selected in Receive mode, the unit receives documents for FAX call or the external TAM records a voice message automatically. To switch between answering machine and facsimile in EXT. TAM Mode.
  • Page 151 KX-F910BX 9-2. CIRCUIT OPERATION TAM INTERFACE circuit consists of EXT. TAM HOOK detection circuit, CNG signal from the party’s detection circuit, VOX detection circuit (to judge sound/no-sound) and RL101 (to separate EXT. TAM). (1) EXT. TAM HOOK detection circuit The bell comes to EXT. TAM and EXT. TAM seizes the line, causing to make DC LOOP. PC105 detects this voltage. During detection PC105 (4) becomes low.
  • Page 152 Circuit Diagram R102 TO TEL LINE IC202 L105 RL101 POS101 D101 From line MODEM (IC11) SA101 – LOOP MODRX SA102 C101 To line L106 C102 TO EXT TEL R120 From C184 R182 R104 R103 L103 MODEM (IC11) C103 VAR1 L104 PC101 C104 R106...

  • Page 153: Operation Panel

    KX-F910BX 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) (COG TYPE) CN302 ASIC KEYS...
  • Page 154 KX-F910BX 11. LCD COG TYPE The Gate Array (IC301) needs 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).
  • Page 155 KX-F910BX 12. SWITCHING POWER SUPPLY SECTION Block Diagram AC Input Converter Input 24V Output Rectifier Circuit Circuit C106 Circuit Output Circuit Q101 A-B Voltage Wave Form Control Circuit DC-DC Converter C-D Voltage Wave Form Over Circuit SUB Printed Current +5V Output...
  • Page 156 KX-F910BX The circuit in the previous page, when the transistor Q101 is ON, secondary rectifier diode D201 is OFF and the energy is charged in the transformer T101. Q101 continues being ON while the voltage is generated by control winding (B). Q101 is tuned OFF by control circuit, then each windings of T101 changes the polarity and rectifier diode D201 truns ON.
  • Page 157 KX-F910BX Dummy load method (for the quick check of power supply output) Power Supply Board V :Vollage Meter CN301 Output range 5V (5.1V + 5%) – 24V (24.5V + 4%) – CN302 5V (5.1V + 5%) – (22Ω 2W) 24V (24.5V + 4%) –...

  • Page 158: Cordless Section

    KX-F910BX 13. CORDLESS SECTION 13-1. EXPLANATION OF CPU DATA COMMUNICATION (1) Calling Portable Base Unit Unit (STANDBY MODE) When calling, a communication request DATA (ACK-T) is transmitted from the Portable Unit first, and a permitting data (ACK-R) is returned from...
  • Page 159 KX-F910BX (3) Ringing Portable Base Unit Unit (STANDBY MODE) Ring signal IN USE LED Flashing ACK-T ACK-R Ring Ringing ACK-L TALK LED Flashing Ring ACK-L After detecting the Ring signal from circuit, the Base Unit sends a LINK form requesting DATA (ACK-T) to the Portable Unit.
  • Page 160 KX-F910BX PORTABLE HANDSET The time is the same as 1. Waveform is imperfect. Transmitting DATA Format Pre data DATA 0 0.504 ms 3.024 ms DATA 1 1.008 ms END data Delimiter DATA Delimt 1.512 ms 2.520 ms BASE UNIT Transmitting DATA Format The time is the same as 1.
  • Page 161 KX-F910BX (7) Pulse Dial Pulse DATA Pre data DATA 0 or DATA 1 DATA 0 or DATA 1 END data 13 bit DATA Delimt When executing Pulse Dial,the Pulse Dial DATA is transmitted from the Portable Handset to the Base Unit in above format.
  • Page 162 IC502 Q503 Q505 RX-MUTE COOD-RX Q504 DATA NOISE NOISE Squelch1 Detect 1 NOISE Squelch2 Detect 2 TX-MUTE COMP LIMIT COOD-TX IC504 Reg. ENABL BUSY-C BUSY-F ENABL Q501 BUSY-F S DATA-F S DATA-C TXPWR S DATA-C S DATA-F 24-DOWN SCLK RESET Q502 BUSY-C DC/DC...
  • Page 163 TX freq 904.0125MH 904.9875MH RX freq 814.0125MH 814.9875MH IC201 Q204 Q203 2XBPF Q201 1stIFAMP RF AMP RF AMP 1stMixer BUFFER 455kHz F204 F201 Buffer Filter LO OSC VCO202 1st Local freq 792.6125MH RX VCO Detector 793.5875MH LOOP IC204 FILTER BLOCK REFERENCE DATA VCO201...
  • Page 164 KX-F910BX 13-4. CIRCUIT OPERATION OF CORDLESS BASE UNIT (1) Power Circuit (charging circuit power supply) Pins 1 and 8 are switched in the clock period which is determined by capacitor C560 connected to pin 3 of the switching regulator IC (IC503). The switching output turns Q507 ON or OFF and reduces the 24V voltage to 12V.
  • Page 165 KX-F910BX (3) Line Receiving Signal The signal supplied from the line is input from pin 6 of CN501 through the analog board, and it is output from pin 6 of the RF unit via IC502 pins 9, 11, 13, 15, 18, 20, 22 and 24 in this order.
  • Page 166 KX-F910BX (6) Electric Field Detect in Circuit The electric field detection circuit comprises a noise amplifier and a noise detection circuit. If the output from the circuit is high level, the information "no signal detected" is sent to MPU IC501. If the output is low level, the information "signal detected"...
  • Page 167 KX-F910BX (2) Receiver RF Circuit ( ): Portable Handset The electric wave received from the antenna is attenuated by the SAW filter F204 except the received frequency band. Then it is amplified by the RF amplifier Q204 and Q203, and supplied to the IC201 pin 23 (MIXER input).
  • Page 168 KX-F910BX (4) TX Power Circuit ( ): Portable Handset The TX VCO output signal flows through the buffer IC202 and IC203 and it is supplied to the TX Power Amp. Q202. 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.
  • Page 169 MIC-MUTE MIC AMP COMP LIMIT SP-MUTE SP AMP TXPB DATA AMP Noise Squelch PLL RST PLL SI VC VA POWER SW PLL CLK RESET PLLDATA PLL LD DIAL KEY RESET P.DOWN Ni-cd TX POWER BATT KEYSCAN BATTLOW TALK RXPOWER Auto Flash TXPB PLLTX...
  • Page 170 TX freq 814.0125MH 814.9875MH RX freq 904.0125MH 904.9875MH IC201 Q205 Q203 2XBPF Q201 1stIFAMP RF AMP RF AMP 1stMixer BUFFER 455kHz F204 F201 Buffer Filter LO OSC VCO202 1st Local freq 925.4125MH RX VCO Detector 926.3875MH LOOP IC204 FILTER REFERENCE BLOCK DATA VCO201...
  • Page 171 KX-F910BX 13-7. CIRCUIT OPERATION OF PORTABLE HANDSET (1) RF Transmission/Reception Power Supply Circuit The power source for transmission is switched on and off by the CPU that controls Q14, Q16 and Q17 for battery current. It is stabilized the constant voltage by the 3 V regulator and supplied to the RF unit and IF IC.
  • Page 172 KX-F910BX (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 signal. The data frequency is digital signal of 600~2000 Hz. The data signal output from pin 1 of CN1 is output from pin 5 as signal of 100~4000 Hz through the HPF of pins 35 and 36 and the LPF in IC1.
  • Page 173 KX-F910BX (6) Sending Signal The received voice signal from the microphone is amplified in the microphone amplifier of Q19 and input to the ALC amplifier of IC1. The ALC circuit prevents the received voice signal from being distorted when a large volume signal is input from the microphone.
  • Page 174 KX-F910BX (8) Charging Detection, ID Data Detection If the portable unit is put on the base unit to recharge it, the DC voltage is applied to the charge terminal on the por- table unit. At this time, the output of the diode bridge becomes High, and the charging detection signal is output when Q6 is changed from High to Low.
  • Page 175 KX-F910BX ¡ FOR SCHEMATIC DIAGRAM 1. DC voltage 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 Varcap.
  • Page 210 KX-F910BX TERMINAL GUIDE OF IC'S, TRANSISTORS AND DIODES PQVIBA12003 PFWIF910BX PQVITC4066BF PQVICX58257C 44 @ MN53007QAF AN1431T PQVI0008GE12 PFVIFA5317P PFVINJ2360D PQVIMM1245BF AN6183SE1 PQVIMC34119M PQVINJM2113V PQVINJM4558M PQVINJM2903M AN6116FAQ PFVIR96DFXL 32 @ 144 @ 1 AN6165SB PQVITC4069UBF PQVIM64084AF PQVIS79164FU PFVIT7D56 PQVIXCC3501P PQVIXC3002PR 2SD1858R...
  • Page 211 KX-F910BX 2SA1627 2SC4604 2SC2235 PFVD2KBP08M PQVDS1ZB40F1 Anode Cathode Anode Cathode Anode Cathode PQVDAK04A PQVDS5688G PQVDERA1802 PQVDERA81004 MA4220 PFVDAG01A MA165 MA6D49 MA4180 MA7200 RLS71 MA110 Cathode Cathode Cathode Cathode Anode Anode Anode Anode MA2S111 MA8047 PQVDRB751H4 PQVDPY1112H MA4075 PQVDBR1112H 1SS131 1SS119...
  • Page 212 KX-F910BX TOOLS PCB3 PCB5 PCB2 PCB1 EC14 EC11 EC12 EC10 EC13 PCB8 EC16 EC15 PCB6-1 EC17 PCB6 | 207 |...
  • Page 213 KX-F910BX CABINET , MECHANICAL AND ELECTRICAL PARTS LOCATION 1. Operation Panel Section PCB3 16-1 |208 |...
  • Page 214 KX-F910BX 2.Upper Section 66-1 62-1 60-1 Note: Attach the pad plate to the top of the cutter unit as shown PCB6-1 above. E601 40-1 PCB8 PCB6 | 209 |...
  • Page 215 KX-F910BX 3.Lower Section 122 123 PCB2 124 125 PCB5 PCB1 |210 |...
  • Page 216 KX-F910BX 4. CCD Section LED ARRAY CCD CHASSIS 170-1 POINT Note: Place the LED Array in the center of point as shown above. PCB4 | 211 |...
  • Page 218 KX-F910BX 6. ACTUAL SIZE OF SCREWS AND WASHER Part No. Figure XTW3+S10P XTW3+W6P PJHE5065Z XSN3+W6FZ XYC3+CF6 XSB4+6 XYN2+C8 XWC4B XYN3+F10 XTB3+12G XTW3+CS12P XTB26+8J XTW26+12F XTB3+10G XTN3+8G XTN26+6J XWC26BFN | 213 |...
  • Page 219 KX-F910BX ACCESSORIES AND PACKING MATERIALS A4, A5, Note: The rechargeable Ni-Cd battery KX-A43BX are available through sales route of Panasoic. |214 |...
  • Page 220 KX-F910BX REPLACEMENT PARTS LIST This replacement parts list is for KX-F910BX version only. Ref. No. Part No. Part Name & Description Model KX-F910BX Notes: 1. RTL (Retention Time Limited) (2. UPPER CABINET/ The marking (RTL) indicates that the Retention Time is limited for this item.
  • Page 221 KX-F910BX This replacement parts list is for KX-F910BX version only. Ref. No. Part No. Part Name & Description P c s Ref. No. Part No. Part Name & Description P c s PFJQ1003Z TX MOTOR PFGT1186Z NAME PLATE PFJS05R24Z CONNECTOR, 5 PIN...
  • Page 222 KX-F910BX This replacement parts list is for KX-F910BX version only. Ref. No. Part No. Part Name & Description Ref. No. Part No. Value (BATTERY) (RESISTORS) BAT10 PQPCR2032H09 PRIMARY BATTERY ERJ3GEYJ473 ERJ3GEYJ473 ERJ3GEYJ473 ERJ3GEYJ101 ERJ3GEYJ101 (CONNECTORS) PQ4R10XJ101 CN 1 PQJP11A19Z CONNECTOR, 11 PIN...
  • Page 223 KX-F910BX This replacement parts list is for KX-F910BX version only. Ref. No. Part No. Value P c s Ref. No. Part No. Part Name & Description & Value P c s PQ4R10XJ000 JUMPER, 0 PQCUV1E104MD 0.1 PQ4R10XJ000 JUMPER, 0 PQCUV1E104MD 0.1...
  • Page 224 KX-F910BX This replacement parts list is for KX-F910BX version only. Ref. No. Part No. Part Name & Description Ref. No. Part No. Part Name & Description & Value (DIODES) (VARISTORS) D101 PQVDS1ZB40F1 DIODE(SI) SA101 PQVDDSS301L VARISTOR D102 1SS119 DIODE(SI) SA102...
  • Page 225 KX-F910BX This replacement parts list is for KX-F910BX version only. Ref. No. Part No. Value P c s Ref. No. Part No. Value P c s R150 ERJ3GEYJ224 220K R271 ERJ3GEYJ102 R158 ERJ3GEYJ222 2.2K R272 ERJ3GEYJ101 R159 ERJ3GEYJ222 2.2K R273...
  • Page 226 KX-F910BX This replacement parts list is for KX-F910BX version only. Ref. No. Part No. Value P c s Ref. No. Part No. Value P c s C136 ECEA0JK221 C244 PQCUV1H105JC C137 ECEA1HKS4R7 C245 PQCUV1E273MD 0.027 C138 ECUV1C473KBV 0.047 C139 ECUV1H223KBV 0.022...
  • Page 227 KX-F910BX This replacement parts list is for KX-F910BX version only. Ref. No. Part No. Part Name & Description P c s Ref. No. Part No. Part Name & Description & Value P c s OPERATION BOARD PARTS (PHOTO COPLERS) PCB3 PFLP1058M OPERATION P.C.BOARD ASS'Y (RTL)
  • Page 228 KX-F910BX This replacement parts list is for KX-F910BX version only. Ref. No. Part No. Part Name & Description & Value P c s Ref. No. Part No. Part Name & Description & Value P c s CCD BOARD PARTS SWITCHING POWER SUPPLY BOARD PARTS...
  • Page 229 KX-F910BX This replacement parts list is for KX-F910BX version only. Ref. No. Part No. Part Name & Description & Value P c s Ref. No. Part No. Part Name & Description & Value P c s (FUSES) (CAPACITORS) F101 XBA2C50TB0L...
  • Page 230 KX-F910BX This replacement parts list is for KX-F910BX version only. Ref. No. Part No. Part Name & Description & Value P c s Ref. No. Part No. Value P c s (DIODES) R511 PQ4R10XJ000 JUMPER, 0 R512 PQ4R10XJ103 D501 PQ4R10XJ000...
  • Page 231 KX-F910BX This replacement parts list is for KX-F910BX version only. Ref. No. Part No. Value P c s Ref. No. Part No. Part Name & Description & Value P c s R620 PQCUV1E104MD 0.1 C520 PQCUV1E104MD 0.1 R621 PQ4R10XJ103 C521 PQCUV1E104MD 0.1...
  • Page 232 KX-F910BX This replacement parts list is for KX-F910BX version only. Ref. No. Part No. Part Name & Description P c s Ref. No. Part No. Value P c s RF UNIT PARTS (for CORDLESS BASE) (RESISTORS) PCB6-1 PQLP10153BX P.C.BOARD ASS'Y (RTL)
  • Page 233 KX-F910BX This replacement parts list is for KX-F910BX version only. Ref. No. Part No. Value P c s Ref. No. Part No. Part Name & Description & Value P c s C226 PQCUV1H105JC (DIODE(SI) C227 ECUV1H103KBV 0.01 C228 ECUV1C104KBV MA8150...
  • Page 234 KX-F910BX This replacement parts list is for KX-F910BX version only. Ref. No. Part No. Part Name & Description P c s Ref. No. Part No. Part Name & Description & Value P c s ERJ3GEYJ122 1.2k R109 Not Used ERJ3GEY0R00 ERJ3GEYJ472 4.7k...
  • Page 235 KX-F910BX This replacement parts list is for KX-F910BX version only. Ref. No. Part No. Value P c s Ref. No. Part No. Value P c s R210 ERJ3GEYJ564 560k Not Used R211 ERJ3GEYJ682 6.8k ECUV1H180JCV R212 ERJ3GEY0R00 ECST0JX226 R213~249 Not Used PQCUV1C683MD 0.068...
  • Page 236 KX-F910BX This replacement parts list is for KX-F910BX version only. Ref. No. Part No. Part Name & Description & Value P c s Ref. No. Part No. Value P c s L208 MQLRE1N2DF COIL R233 ERJ3GEYJ2R2 L209 MQLRE10NJF COIL R234 ERJ3GEYJ562 5.6k...
  • Page 237 KX-F910BX This replacement parts list is for KX-F910BX version only. Ref. No. Part No. Part Name & Description & Value P c s CHARGER BOARD PARTS PCB9 PFLP1072BXZ CHARGER P.C.BOARD ASS'Y (RTL (DIODES) D701 MA4220 DIODE(SI) D702 MA4220 DIODE(SI) D703...

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