Panasonic KX-FP81BX Service Manual
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Panasonic KX-FP81BX Service Manual

Panasonic KX-FP81BX Service Manual

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KX-FP81BX
KX-FP81CX
KX-FP82CX
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distribution is a violation of law.
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Summary of Contents for Panasonic KX-FP81BX

  • Page 1 ORDER NO. KMF0006416C3 Compact Plain Paper FAX KX-FP81BX KX-FP81CX KX-FP82CX © 2000 Kyushu Matsushita Electric Co., Ltd. All rights reserved. Unauthorized copying distribution is a violation of law.

  • Page 2: Table Of Contents

    KX-FP81BX / KX-FP81CX / KX-FP82CX CONTENTS Page Page 1 INTRODUCTION 6 CIRCUIT OPERATIONS 1.1. SAFETY PRECAUTIONS 6.1. CONNECTION DIAGRAM 1.2. INSULATION RESISTANCE TEST 6.2. GENERAL BLOCK DIAGRAM 1.3. FOR SERVICE TECHNICIANS 6.3. CONTROL SECTION 1.4. BATTERY CAUTION 6.4. FACSIMILE SECTION 1.5.

  • Page 3: Introduction

    KX-FP81BX / KX-FP81CX / KX-FP82CX 1 INTRODUCTION 1.1. SAFETY PRECAUTIONS 1. Before servicing, unplug the AC 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 4: Ac Caution

    KX-FP81BX / KX-FP81CX / KX-FP82CX 1.5. AC CAUTION For safety, before closing the lower cabinet, please make sure of the following precautions. 1. The earth lead is fixed with the screw. 2. The AC connector is connected properly. 3. Wrap the earth lead around the core 3 times.

  • Page 5: Service Precautions

    KX-FP81BX / KX-FP81CX / KX-FP82CX 1.6.2. LIVE ELECTRICAL SECTIONS All the electrical sections of the unit supplied with AC power by the AC power cord are live. Never disassemble the unit for service with the AC power supply plugged in.

  • Page 6: Features

    KX-FP81BX / KX-FP81CX / KX-FP82CX 1.8. FEATURES General · Help function Please refer to 2.1.3. WHEN YOU DON'T KNOW HOW TO OPERATE THE UNIT, USE THE HELP FUNCTION.(P.25) to print below features. Display: 1. QUICK SET UP 2. FEATURE LIST 3.

  • Page 7: Specifications

    KX-FP81BX / KX-FP81CX / KX-FP82CX 1.9. SPECIFICATIONS Applicable Lines: Public Switched Telephone Network Document Size: Max. 216 mm (8 1/2") in width Max. 600 mm (23 5/8") in length Effective Scanning Width: 208 mm (8 3/16") Recording Paper Size: Letter: 216×279 mm (8 1/2"×11") A4: 210×297 mm (8 1/4"×11 11/16")

  • Page 8: Test Chart

    KX-FP81BX / KX-FP81CX / KX-FP82CX 1.11. TEST CHART 1.11.1. ITU-T No.1 TEST CHART...
  • Page 9 KX-FP81BX / KX-FP81CX / KX-FP82CX 1.11.2. ITU-T No.2 TEST CHART...

  • Page 10: Location Of Controls

    KX-FP81BX / KX-FP81CX / KX-FP82CX 1.12. LOCATION OF CONTROLS 1.12.1. OVERVIEW Note: · The document will be ejected from the front of the unit. Install the unit on a desk or floor with a smooth surface and do not place anything in front of the unit.

  • Page 11: Control Panel

    KX-FP81BX / KX-FP81CX / KX-FP82CX 1.12.2. CONTROL PANEL...

  • Page 12: Connections

    KX-FP81BX / KX-FP81CX / KX-FP82CX 1.13. CONNECTIONS (1) Connect the handset cord. (2) Connect the telephone line cord. (3) Connect the power cord. · When the power is turned on for the first time, the unit will print some basic information.

  • Page 13: Installation

    KX-FP81BX / KX-FP81CX / KX-FP82CX 1.14. INSTALLATION 1.14.1. INSTALLATION SPACE The space required to install the unit is shown below. The dimensions given are necessary for the unit to operate efficiently. Note: · Avoid excessive heat or humidity. · Use the unit within the following ranges of temperature and humidity.

  • Page 14: Installing The Paper Tray

    KX-FP81BX / KX-FP81CX / KX-FP82CX 1.14.2. INSTALLING THE PAPER TRAY Insert one tab on the paper tray into one slot on the back of the unit ) and then insert the other tab into the other slot ( Note: · Do not place the unit in areas where the paper tray may be obstructed by a wall, etc.

  • Page 15: Installing The Recording Paper

    KX-FP81BX / KX-FP81CX / KX-FP82CX 1.14.3. INSTALLING THE RECORDING PAPER * A4 or Letter ** size recording paper can be loaded. The unit can hold up to 50 sheets of 60 g/m to 75 g/m (16 lb. to 20lb.) paper or 30 sheets of 90 g/m (24 lb.) paper.
  • Page 16 KX-FP81BX / KX-FP81CX / KX-FP82CX 1.14.4. ADDING PAPER TO THE PAPER TRAY Pull the cassette open lever forward and remove all of the installed paper. Add paper to the removed paper and straighten. Fan the stack of paper. Pull the tension bar forward and hold open while inserting the paper.

  • Page 17: Setting Your Logo

    KX-FP81BX / KX-FP81CX / KX-FP82CX 1.14.6. SETTING YOUR LOGO The logo can be your company, division or name. Press Display: Press , then Press Enter your logo, up to 30 characters, by using the dial keypad. Example: Bill a. Press twice.
  • Page 18 KX-FP81BX / KX-FP81CX / KX-FP82CX 1.14.7. TO SELECT CHARACTERS WITH THE DIAL KEYPAD 1.14.8. TO SELECT CHARACTERS USING THE EASY DIAL Instead of pressing the dial keys, you can select characters using the EASY DIAL. Rotate unit the desired character is displayed.

  • Page 19: Replacing The Film Cartridge

    KX-FP81BX / KX-FP81CX / KX-FP82CX 1.14.9. REPLACING THE FILM CARTRIDGE When the unit runs out of ink film, the following message will be displayed. Display: Install a new ink film. The following ink films are available for replacement. Each roll prints about 150 letter size pages.
  • Page 20 KX-FP81BX / KX-FP81CX / KX-FP82CX Remove the stoppers and tags from the new ink film. Find the “T” shaped gear (blue). Insert the blue core of the front ink film roll into the right slot of the unit ( ). Insert the “T” shaped gear (blue) into the...

  • Page 21: Maintenance Items And Component Locations

    KX-FP81BX / KX-FP81CX / KX-FP82CX 1.15. MAINTENANCE ITEMS AND COMPONENT LOCATIONS 1.15.1. OUTLINE MAINTENANCE AND REPAIRS ARE PERFORMED USING THE FOLLOWING STEPS. 1. Periodic maintenance Inspect the equipment periodically and if necessary, clean any contaminated parts. 2. Check for breakdowns Look for problems and consider how they arose.
  • Page 22 KX-FP81BX / KX-FP81CX / KX-FP82CX 1.15.2. MAINTENANCE CHECK ITEMS/COMPONENT LOCATIONS...
  • Page 23 KX-FP81BX / KX-FP81CX / KX-FP82CX 1.15.2.1. MAINTENANCE LIST OPERATION CHECK REMARKS Document Path Remove any foreign matter such as paper. — Rollers If the roller is dirty, clean it with a damp cloth then dry Refer to 1.15.3. thoroughly. MAINTENANCE(P.24).

  • Page 24: Cleaning The Pickup Roller

    KX-FP81BX / KX-FP81CX / KX-FP82CX 1.15.3. MAINTENANCE 1.15.3.1. CLEANING THE DOCUMENT FEEDER UNIT If misfeeding occurs frequently or if dirty patterns or bands appear on a transmitted document or on the original of a copied document, clean the document feeder.

  • Page 25: Troubleshooting Guide

    KX-FP81BX / KX-FP81CX / KX-FP82CX 2 TROUBLESHOOTING GUIDE 2.1. TROUBLESHOOTING SUMMARY 2.1.1. TROUBLESHOOTING After confirming the problem by asking the user, troubleshoot according to the instructions and observe the following precautions. 2.1.2. PRECAUTIONS 1. If there is a problem with the print quality or the paper feed, first check if the installation space and the print paper meets the specifications, the paper selection lever/paper thickness lever is set correctly, and the paper is set correctly without any slack.

  • Page 26: User Recoverable Errors

    KX-FP81BX / KX-FP81CX / KX-FP82CX 2.2. USER RECOVERABLE ERRORS If the unit detects a problem, one or more of the following messages will appear on the display. Note: The explanations given in the [ ] are for servicemen only. CROSS REFERENCE: 1.8.

  • Page 27: Document Jams

    KX-FP81BX / KX-FP81CX / KX-FP82CX CROSS REFERENCE: 2.2.1. DOCUMENT JAMS(P.27) Note: The explanations given in the [ ] are for servicemen only. 2.2.1. DOCUMENT JAMS If the unit does not release the document during feeding, remove the jammed document as follows.

  • Page 28: Recording Paper Jams

    KX-FP81BX / KX-FP81CX / KX-FP82CX 2.2.2. RECORDING PAPER JAMS If the unit does not eject any recording paper during reception or copying, the recording paper has jammed and the display will show the following massage. When paper has jammed under the film cartridge Display: Remove the jammed paper as follows.
  • Page 29 KX-FP81BX / KX-FP81CX / KX-FP82CX If the ink film is slack, tighten it by winding the gears. Close the back cover securely by pushing down on the dotted area at both ends ( Close the front cover securely (...

  • Page 30: Troubleshooting Details

    KX-FP81BX / KX-FP81CX / KX-FP82CX 2.3. TROUBLESHOOTING DETAILS 2.3.1. OUTLINE Troubleshooting is for recovering quality and reliability by determining the broken component and replacing, adjusting or cleaning it as required. First, determine the problem then decide the troubleshooting method. If you have difficulty finding the broken part, determine which board is broken.
  • Page 31 KX-FP81BX / KX-FP81CX / KX-FP82CX 2.3.3. TROUBLESHOOTING ITEMS TABLE CROSS REFERENCE: 2.3.4. ADF (Auto Document Feed) SECTION(P.33) 2.3.5. COMMUNICATION SECTION(P.46) 2.3.7. ANALOG BOARD SECTION(P.74) 2.3.9. OPERATION PANEL SECTION(P.80) 2.3.10. SENSOR SECTION(P.81)
  • Page 32 KX-FP81BX / KX-FP81CX / KX-FP82CX 2.3.3.1. SIMPLE CHECK LIST CROSS REFERENCE: 2.5. TEST FUNCTIONS(P.99)
  • Page 33 KX-FP81BX / KX-FP81CX / KX-FP82CX 2.3.4. ADF (Auto Document Feed) SECTION 2.3.4.1. NO DOCUMENT FEED CROSS REFERENCE: 2.3.6. DIGITAL BOARD SECTION(P.65) 2.3.8. POWER SUPPLY BOARD SECTION(P.77) 2.3.10. SENSOR SECTION(P.81) 2.5. TEST FUNCTIONS(P.99) 3 ADJUSTMENTS(P.106) 4 DISASSEMBLY INSTRUCTIONS(P.107) 6.4.5. STEPPING MOTOR DRIVE CIRCUIT(P.141) Note: When using thin paper etc., sometimes the document will not feed.

  • Page 34: Document Jam

    KX-FP81BX / KX-FP81CX / KX-FP82CX 2.3.4.2. DOCUMENT JAM CROSS REFERENCE: 2.3.10. SENSOR SECTION(P.81) 4 DISASSEMBLY INSTRUCTIONS(P.107)
  • Page 35 KX-FP81BX / KX-FP81CX / KX-FP82CX 2.3.4.3. MULTIPLE FEED · When using thick paper etc., sometimes the document will not be fed. Refer to 3.1. ADJUSTING THE FEEDER PRESSURE(P.106). Fig. B CROSS REFERENCE: 1.15.3. MAINTENANCE(P.24) 3 ADJUSTMENTS(P.106) 4 DISASSEMBLY INSTRUCTIONS(P.107) Note: When confirming if the characters are extended or distorted, or if the feed problem is occurred, use this test chart format (Fig.
  • Page 36 KX-FP81BX / KX-FP81CX / KX-FP82CX 2.3.4.4. SKEW * We recommend making a copy of the Fig. B document in 2.3.4.3. MULTIPLE FEED (P.35) and using it. CROSS REFERENCE: 1.15.2. MAINTENANCE CHECK ITEMS/COMPONENT LOCATIONS(P.22) 2.3.4. ADF (Auto Document Feed) SECTION(P.33) 2.3.4.3. MULTIPLE FEED(P.35)
  • Page 37 KX-FP81BX / KX-FP81CX / KX-FP82CX 2.3.4.5. THE RECORDING PAPER DOES NOT FEED * We recommend making a copy of the Fig. B document in 2.3.4.3. MULTIPLE FEED (P.35)and using it. CROSS REFERENCE: 1.14.3. INSTALLING THE RECORDING PAPER(P.15) 2.3.6. DIGITAL BOARD SECTION(P.65) 2.3.8.

  • Page 38: Paper Jam

    KX-FP81BX / KX-FP81CX / KX-FP82CX 2.3.4.6. PAPER JAM CROSS REFERENCE: 2.3.10. SENSOR SECTION(P.81) 2.5. TEST FUNCTIONS(P.99) 4 DISASSEMBLY INSTRUCTIONS(P.107) 6.5. SENSORS AND SWITCHES(P.151)
  • Page 39 KX-FP81BX / KX-FP81CX / KX-FP82CX 2.3.4.7. MULTIPLE FEED AND SKEW CROSS REFERENCE: 4 DISASSEMBLY INSTRUCTIONS(P.107) 9.1. OPERATION PANEL SECTION(P.176) 2.3.4.8. THE SENT FAX DATA IS SKEWED * We recommend making a copy of the Fig. B document in 2.3.4.3. MULTIPLE FEED(P.35) and using it.
  • Page 40 KX-FP81BX / KX-FP81CX / KX-FP82CX 2.3.4.10. RECEIVED OR COPIED DATA IS EXPANDED * We recommend making a copy of the Fig. B document in 2.3.4.3. MULTIPLE FEED(P.35) and using it. CROSS REFERENCE: 4 DISASSEMBLY INSTRUCTIONS(P.107)
  • Page 41 KX-FP81BX / KX-FP81CX / KX-FP82CX 2.3.4.11. A BLANK PAGE IS COPIED * We recommend making a copy of the Fig. B document in 2.3.4.3. MULTIPLE FEED (P.35) and using it. CROSS REFERENCE: 2.3.4.3. MULTIPLE FEED(P.35) 2.3.4.12. ABLANK PAGE IS RECEIVED(P.43) 2.5.
  • Page 42 KX-FP81BX / KX-FP81CX / KX-FP82CX Fig. C...
  • Page 43 KX-FP81BX / KX-FP81CX / KX-FP82CX 2.3.4.12. ABLANK PAGE IS RECEIVED CROSS REFERENCE: 2.3.4.11. A BLANK PAGE IS COPIED(P.41) 2.3.7. ANALOG BOARD SECTION(P.74) 2.5. TEST FUNCTIONS(P.99) 2.3.4.13. BLACK OR WHITE VERTICAL LINE * We recommend making a copy of the Fig. B document in 2.3.4.3. MULTIPLE FEED (P.35) and using it.
  • Page 44 KX-FP81BX / KX-FP81CX / KX-FP82CX 2.3.4.14. BLACK OR WHITE LATERAL LINE ON PRINT OUT * We recommend making a copy of the Fig. B document in 2.3.4.3. MULTIPLE FEED(P.35) and using it. CROSS REFERENCE: 2.3.4.3. MULTIPLE FEED(P.35) 2.3.4.11. A BLANK PAGE IS COPIED(P.41) 2.3.6.
  • Page 45 KX-FP81BX / KX-FP81CX / KX-FP82CX 2.3.4.15. AN ABNORMAL IMAGE IS PRINTED * We recommend making a copy of the Fig. B document in 2.3.4.3. MULTIPLE FEED (P.35) and using it. CROSS REFERENCE: 2.3.4.3. MULTIPLE FEED(P.35) 2.3.7. ANALOG BOARD SECTION(P.74) 2.5. TEST FUNCTIONS(P.99)
  • Page 46 KX-FP81BX / KX-FP81CX / KX-FP82CX 2.3.5. COMMUNICATION SECTION Find the problem in the table shown below, and refer to the corresponding troubleshooting procedure in 2.3.5.1. DEFECTIVE FACSIMILE SECTION P.47. Symptom Content Possible cause The paper is not fed properly when faxing.
  • Page 47 KX-FP81BX / KX-FP81CX / KX-FP82CX 2.3.5.1. DEFECTIVE FACSIMILE SECTION 2.3.5.1.1. TRANSMIT PROBLEM CROSS REFERENCE: 1.15.3. MAINTENANCE(P.24) 2.3.4. ADF (Auto Document Feed) SECTION(P.33) 2.3.9. OPERATION PANEL SECTION(P.80)
  • Page 48 KX-FP81BX / KX-FP81CX / KX-FP82CX 2.3.5.1.2. SOMETIME THERE IS A TRANSMIT PROBLEM Note: "596: Transmit level set" represents a service code. (Refer to 2.4.4. SERVICE FUNCTION TABLE(P.87).)
  • Page 49 KX-FP81BX / KX-FP81CX / KX-FP82CX 2.3.5.1.3. RECEIVE PROBLEM First confirm whether the recording paper is installed properly or not before starting troubleshooting. (Refer to "Remarks".) Note: "596: Transmit level set" represents a service code. (Refer to 2.4.4. SERVICE FUNCTION TABLE(P.87).)
  • Page 50 KX-FP81BX / KX-FP81CX / KX-FP82CX 2.3.5.1.4. THE UNIT CAN COPY, BUT CANNOT TRANSMIT/RECEIVE CROSS REFERENCE: 2.3.7. ANALOG BOARD SECTION(P.74) 2.5. TEST FUNCTIONS(P.99) 2.3.5.1.5. THE UNIT CAN COPY, BUT CANNOT EITHER TRANSMIT/RECEIVE LONG DISTANCE OR INTERNATIONL COMMUNICATIONS The following two causes can be considered for this symptom.
  • Page 51 KX-FP81BX / KX-FP81CX / KX-FP82CX (Cause and Countermeasure) As shown in the chart above, the total handshaking time must be reduced, but because of the long distance connection and linking of several stations, the line connection time cannot be reduced. Accordingly, the following countermeasures should be tried.
  • Page 52 KX-FP81BX / KX-FP81CX / KX-FP82CX (Cause C) This model is FAX1 and the other party is FAX2. For transmission from this model to FAX2, FAX2 executes automatic reception and transmits a CED signal (2100 Hz) followed by a DIS signal. As the echo cancelers stop as described in cause B, the echo of the DIS signal returns to FAX2. On the other hand, this model detects the DIS signal and transmits a DCS signal.
  • Page 53 KX-FP81BX / KX-FP81CX / KX-FP82CX 2.3.5.1.7. HOW TO OUTPUT THE JOURNAL REPORT 1. Press the MENU button twice. 2. Rotate EASY DIAL until the “ JOURNAL REPORT ” is displayed. 3. Press the SET button. 4. The report prints out.
  • Page 54 KX-FP81BX / KX-FP81CX / KX-FP82CX...
  • Page 55 KX-FP81BX / KX-FP81CX / KX-FP82CX CROSS REFERENCE: 2.5. TEST FUNCTIONS(P.99)
  • Page 56 KX-FP81BX / KX-FP81CX / KX-FP82CX CROSS REFERENCE: 2.5. TEST FUNCTIONS(P.99)
  • Page 57 KX-FP81BX / KX-FP81CX / KX-FP82CX CROSS REFERENCE: 2.5. TEST FUNCTIONS(P.99)
  • Page 58 KX-FP81BX / KX-FP81CX / KX-FP82CX CROSS REFERENCE: 2.5. TEST FUNCTIONS(P.99)
  • Page 59 KX-FP81BX / KX-FP81CX / KX-FP82CX...
  • Page 60 KX-FP81BX / KX-FP81CX / KX-FP82CX...
  • Page 61 KX-FP81BX / KX-FP81CX / KX-FP82CX CROSS REFERENCE: 2.5. TEST FUNCTIONS(P.99)

  • Page 62: Remote Programming

    KX-FP81BX / KX-FP81CX / KX-FP82CX 2.3.5.2. REMOTE PROGRAMMING If, after the call is connected, the customer describes the situation and it is determined that the problem can be corrected by making parameter changes, this function makes it possible to change parameters such as the user code and service code from another fax (using DTMF tones).
  • Page 63 KX-FP81BX / KX-FP81CX / KX-FP82CX 2.3.5.2.2. PROGRAM MODE TABLE Code Function Set Value Default Remote Setting Set date and time mm/dd/yy hh:mm Jan/01/00 Your logo --------- None Your fax number --------- None Transmission report mode 1:Error / 2:ON / 3:OFF...
  • Page 64 KX-FP81BX / KX-FP81CX / KX-FP82CX Code Function Set Value Default Remote Setting Power on film feed 1:ON / 2:OFF CNG detect time for friendly reception 1:10s / 2:20s / 3:30s T1 timer 1:35s / 2:60s T4 timer 00~99 × 100ms Sensor &...

  • Page 65: Digital Board Section

    KX-FP81BX / KX-FP81CX / KX-FP82CX 2.3.6. DIGITAL BOARD SECTION When the unit fails to boot up the system, take the troubleshooting procedures very carefully. It may have a serious problem. The symptom: No response when the power is turned on. (No LCD display, and keys are not accepted.) The first step is to check the power source.
  • Page 66 KX-FP81BX / KX-FP81CX / KX-FP82CX 2.3.6.1. DIGITAL BLOCK DIAGRAM You also need to check the signal lines listed here [List 1] when the unit fails to boot up the system. Those signal lines should remain normal. Other signal lines are not directly related to that failure even if they have faults or troubles.
  • Page 67 KX-FP81BX / KX-FP81CX / KX-FP82CX NG Wave pattern (Refer to NG EXAMPLE)
  • Page 68 KX-FP81BX / KX-FP81CX / KX-FP82CX Normal Wave Patterns Remarks: When you use an oscilloscope to judge whether a signal to be tested is normal or NG, perform the signal check in exactly the same order as in [List 1]. (If the ASIC fails to access the ROM, the ASIC cannot access SRAM or DRAM normally.) The digital circuit actually operates according to the timing combinations of these signals.
  • Page 69 KX-FP81BX / KX-FP81CX / KX-FP82CX I/O and Pin No. Diagram...
  • Page 70 KX-FP81BX / KX-FP81CX / KX-FP82CX After the power is turned on, the ASIC initializes and checks each IC. The ROM, SRAM, and modem are checked. If initialization fails for the ICs , the system will not boot up. In this case, please find the cause as follows.
  • Page 71 KX-FP81BX / KX-FP81CX / KX-FP82CX CROSS REFERENCE: 2.3.6.3. CHECK THE STATUS OF THE DIGITAL BOARD(P.73) Other NG example while the power is ON and the LCD displays the following.
  • Page 72 KX-FP81BX / KX-FP81CX / KX-FP82CX 2.3.6.2. NG EXAMPLE...
  • Page 73 KX-FP81BX / KX-FP81CX / KX-FP82CX 2.3.6.3. CHECK THE STATUS OF THE DIGITAL BOARD...
  • Page 74 KX-FP81BX / KX-FP81CX / KX-FP82CX 2.3.7. ANALOG BOARD SECTION This chapter provides the testing procedures required for the analog parts. A signal route to be tested is determined depending upon purposes. For example, the handset TX route begins at the handset microphone and the signal is output to the telephone line.
  • Page 75 KX-FP81BX / KX-FP81CX / KX-FP82CX 2.3.7.2. DEFECTIVE ITS (Integrated Telephone System) SECTION 1. No handset and speakerphone transmission / reception Perform a signal test in the ITS or the NCU section and locate a defective point (where the signal disappears) on each route...
  • Page 76 KX-FP81BX / KX-FP81CX / KX-FP82CX 4. No tone dialing CROSS REFERENCE: 2.3.7.1. CHECK SHEET(P.74) 2.3.7.3. DETECTIVE TAM INTERFACE SECTION 1. The FAX turns on, but does not arrive through TAM. CROSS REFERENCE: 6.10.2. CIRCUIT OPERATION(P.168) 2. A FAX is received, but won´t switch from TAM to FAX.
  • Page 77 KX-FP81BX / KX-FP81CX / KX-FP82CX 2.3.8. POWER SUPPLY BOARD SECTION 2.3.8.1. KEY COMPONENTS FOR TROUBLESHOOTING Check the following parts first: F101, D101-D104, C106, Q101, PC101 and IC101. This comes from our experience with experimental tests. For example: power supply and lightning surge voltage test, withstanding voltage test, intentional short circuit test, etc.
  • Page 78 KX-FP81BX / KX-FP81CX / KX-FP82CX 2.3.8.2. TOROUBLESHOOTING FLOW CHART...
  • Page 79 KX-FP81BX / KX-FP81CX / KX-FP82CX 2.3.8.3. BROKEN PARTS REPAIR DETAILS (D101, D102, D103, D104) Check for a short-circuit in terminal 4. If D101, D102, D103 and D104 are short-circuits, F101 will melt (open). In this case, replace all of the parts (D101, D102, D103, D104, F101).
  • Page 80 KX-FP81BX / KX-FP81CX / KX-FP82CX 2.3.9. OPERATION PANEL SECTION 2.3.9.1. NO KEY OPERATION CROSS REFERENCE: 2.5. TEST FUNCTIONS(P.99) 2.3.9.2. NO LCD INDICATION CROSS REFERENCE: 2.5. TEST FUNCTIONS(P.99)
  • Page 81 KX-FP81BX / KX-FP81CX / KX-FP82CX 2.3.10. SENSOR SECTION Refer to 6.5. SENSORS AND SWITCHES(P.151) for the circuit descriptions. The Test Function makes the sensor circuit check easier. (Refer to 2.5. TEST FUNCTIONS(P.99).) For example, as for "COVER OPEN SENSOR", "CO" is turned ON/OFF on the display when you open or close the front cover.
  • Page 82 KX-FP81BX / KX-FP81CX / KX-FP82CX 2.3.10.5. CHECK THE PAPER TOP SENSER (PS501)......"PAPER JAMMED" 2.3.11. CIS (Contact Image Sensor) SECTION Refer to 6.4.4. SCANNING BLOCK(P.140). CROSS REFERENCE: 2.5. TEST FUNCTIONS(P.99)
  • Page 83 KX-FP81BX / KX-FP81CX / KX-FP82CX...
  • Page 84 KX-FP81BX / KX-FP81CX / KX-FP82CX 2.3.12. THERMAL HEAD SECTION Refer to 6.4.3. THERMAL HEAD(P.138).

  • Page 85: Programming And Lists

    KX-FP81BX / KX-FP81CX / KX-FP82CX 2.4. PROGRAMMING AND LISTS The programming functions are used to program the various features and functions of the machine, and to test the machine. This facilitates communication between the user and the service man while programming the unit.
  • Page 86 KX-FP81BX / KX-FP81CX / KX-FP82CX 2.4.3. USER MODE (The list below is an example of the SYSTEM SETUP LIST the unit prints out.) Note: The above values are the default values.
  • Page 87 KX-FP81BX / KX-FP81CX / KX-FP82CX 2.4.4. SERVICE FUNCTION TABLE Code Function Set Value Effective Default Remarks Range Pause time set X 100 msec 001~600 ---------- Flash time X 10 ms 01~99 ---------- Dial speed select 1:10 pps 2:20 1, 2...
  • Page 88 KX-FP81BX / KX-FP81CX / KX-FP82CX Code Function Set Value Effective Default Remarks Range Receive error limit value set X Number of 001~999 Sets the number of acceptable error lines when times the FAX reconstructs the received data. Refer to 2.3.5.1.3. RECEIVE PROBLEM(P.49).
  • Page 89 KX-FP81BX / KX-FP81CX / KX-FP82CX 2.4.5. SERVICE MODE SETTINGS (Example of a printed out list) Note: The above values are the default values.
  • Page 90 KX-FP81BX / KX-FP81CX / KX-FP82CX 2.4.6. HISTORY Note: See the following descriptions of this report. Item No. (1) ~ (49) are corresponding to the listed items in 2.4.6.1. DESCRIPTIONS OF THE HISTORY REPORT(P.91).
  • Page 91 KX-FP81BX / KX-FP81CX / KX-FP82CX 2.4.6.1. DESCRIPTIONS OF THE HISTORY REPORT (1) ROM VERSION EPROM version (2) SUM EPROM internal data calculation. (3) YOUR LOGO The user logo recorded in the unit. If it is not recorded, NONE will be displayed.
  • Page 92 KX-FP81BX / KX-FP81CX / KX-FP82CX (25) NUM(BER OF RECORDING MESSAGE The number of messages recorded in TAM. (26) NUMBER OF PC SCAN The number of times multifunction was used for the Scanner. (The number of pages scanned. If the unit does not have a PC interface, NONE will be printed.)
  • Page 93 KX-FP81BX / KX-FP81CX / KX-FP82CX (49) ENGINE VERSION IEngine Control CPU Version.
  • Page 94 KX-FP81BX / KX-FP81CX / KX-FP82CX 2.4.7. SPECIAL SERVICE JOURNAL REPORTS Journal 2 and Journal 3 shown below, which are special journals giving the additional detailed information about the latest 35 communications, can be printed by Service Code 881 or 882. Remote printing function for the journal reports (JOURNAL, JOURNAL 2 and JOURNAL 3) is also available for service technicians.
  • Page 95 KX-FP81BX / KX-FP81CX / KX-FP82CX 2.4.7.1. JOURNAL 2 Refer to JOURNAL 2 in 2.4.7.3. PRINTOUT EXAMPLE(P.97). Journal 2 displays the additional detailed information about the last 35 communications. Descriptions: (1) RCV. MODE Indicates which receive mode the unit was in when the unit received a fax message.
  • Page 96 KX-FP81BX / KX-FP81CX / KX-FP82CX 2.4.7.2. JOURNAL 3 Refer to JOURNAL 3 in 2.4.7.3. PRINTOUT EXAMPLE(P.97). Descriptions: (6) ENCODE Compression Code: MH/MR (7) MSLT MSLT means Minimum Scan Line Time. Used only at the factory. (8) EQM EQM means Eye Quality Monitor. Used only at the factory.
  • Page 97 KX-FP81BX / KX-FP81CX / KX-FP82CX 2.4.7.3. PRINTOUT EXAMPLE...
  • Page 98 KX-FP81BX / KX-FP81CX / KX-FP82CX...

  • Page 99: Test Functions

    KX-FP81BX / KX-FP81CX / KX-FP82CX 2.5. TEST FUNCTIONS The codes listed below can be used to perform simple checks of some of the unit’s functions. When complaints are received from customers, they provide an effective tool for identifying the locations and causes of malfunctions.

  • Page 100: Dtmf Single Tone Transmit Selection

    KX-FP81BX / KX-FP81CX / KX-FP82CX Note: The numbers in the boxes (XXX) indicate the keys to be input for the various test modes. CROSS REFERENCE: 6.5. SENSORS AND SWITCHES(P.151) 2.5.1. DTMF SINGLE TONE TRANSMIT SELECTION Note: After performing this check, do not forget to turn the setting off.

  • Page 101: Button Code Table

    KX-FP81BX / KX-FP81CX / KX-FP82CX 2.5.2. BUTTON CODE TABLE Note: These codes (00, 01) are only for the data in the History Report.
  • Page 102 KX-FP81BX / KX-FP81CX / KX-FP82CX 2.5.3. PRINT TEST PATTERN 1. Platen roller (Reference pattern)
  • Page 103 KX-FP81BX / KX-FP81CX / KX-FP82CX 2. Left margin/Top margin (Reference pattern)
  • Page 104 KX-FP81BX / KX-FP81CX / KX-FP82CX 3. Thermal head 1 dot (Reference pattern)
  • Page 105 KX-FP81BX / KX-FP81CX / KX-FP82CX 4. Use this test pattern to confirm the torque limiter for Ink film and platen roller timing. (Reference pattern)

  • Page 106: Adjustments

    KX-FP81BX / KX-FP81CX / KX-FP82CX 3 ADJUSTMENTS 3.1. ADJUSTING THE FEEDER PRESSURE If misfeeding of a document such as multiple feeding or no feeding occurs frequently, try to adjust the feeder pressure by following the steps below. 1. Open the front cover by pulling up the center part.

  • Page 107: Disassembly Instructions

    KX-FP81BX / KX-FP81CX / KX-FP82CX 4 DISASSEMBLY INSTRUCTIONS 4.1. HOW TO REMOVE THE BOTTOM FRAME...

  • Page 108: How To Remove The Operation Panel Block

    KX-FP81BX / KX-FP81CX / KX-FP82CX 4.2. HOW TO REMOVE THE OPERATION PANEL BLOCK...

  • Page 109: How To Remove The Operation Board And Lcd

    KX-FP81BX / KX-FP81CX / KX-FP82CX 4.3. HOW TO REMOVE THE OPERATION BOARD AND LCD...

  • Page 110: Power Boards And Ac Inlet

    KX-FP81BX / KX-FP81CX / KX-FP82CX 4.4. HOW TO REMOVE THE ANALOG, DIGITAL AND POWER BOARDS AND AC INLET...

  • Page 111: How To Remove The Motor Block

    KX-FP81BX / KX-FP81CX / KX-FP82CX 4.5. HOW TO REMOVE THE MOTOR BLOCK...
  • Page 112 KX-FP81BX / KX-FP81CX / KX-FP82CX...

  • Page 113: How To Remove The Separation Roller

    KX-FP81BX / KX-FP81CX / KX-FP82CX 4.6. HOW TO REMOVE THE SEPARATION ROLLER...

  • Page 114: How To Remove The Image Sensor (Cis)

    KX-FP81BX / KX-FP81CX / KX-FP82CX 4.7. HOW TO REMOVE THE IMAGE SENSOR (CIS)

  • Page 115: How To Remove The Termal Head

    KX-FP81BX / KX-FP81CX / KX-FP82CX 4.8. HOW TO REMOVE THE TERMAL HEAD...

  • Page 116: How To Remove The Platen Roller,

    KX-FP81BX / KX-FP81CX / KX-FP82CX 4.9. HOW TO REMOVE THE PLATEN ROLLER, BACK COVER...

  • Page 117: How To Remove The Pickup Roller

    KX-FP81BX / KX-FP81CX / KX-FP82CX 4.10. HOW TO REMOVE THE PICKUP ROLLER...

  • Page 118: How To Remove The Cassette Plate

    KX-FP81BX / KX-FP81CX / KX-FP82CX 4.11. HOW TO REMOVE THE CASSETTE PLATE...

  • Page 119: How To Remove The Document Tray

    KX-FP81BX / KX-FP81CX / KX-FP82CX 4.12. HOW TO REMOVE THE DOCUMENT TRAY...

  • Page 120: Installation Position Of The Lead Wires

    KX-FP81BX / KX-FP81CX / KX-FP82CX 4.13. INSTALLATION POSITION OF THE LEAD WIRES...

  • Page 121: How To Replace The Flat Package Ic

    KX-FP81BX / KX-FP81CX / KX-FP82CX 5 HOW TO REPLACE THE FLAT PACKAGE IC Even if you do not have the special tools (for example, a spot heater) to remove the Flat IC, with some solder (large amount), a soldering iron and a cutter knife, you can easily remove the ICs that have more than 100 pins.

  • Page 122: Flat Package Ic Installation Procedure

    KX-FP81BX / KX-FP81CX / KX-FP82CX 5.3. FLAT PACKAGE IC INSTALLATION PROCEDURE 1. Temporarily fix the FLAT PACKAGE IC, soldering the two marked pins. *Check the accuracy of the IC setting with the corresponding soldering foil. 2. Apply flux to all pins of the FLAT PACKAGE IC.

  • Page 123: Circuit Operations

    KX-FP81BX / KX-FP81CX / KX-FP82CX 6 CIRCUIT OPERATIONS 6.1. CONNECTION DIAGRAM...

  • Page 124: General Block Diagram

    KX-FP81BX / KX-FP81CX / KX-FP82CX 6.2. GENERAL BLOCK DIAGRAM The following is an outline of each device IC on the digital board. (Refer to 6.2.1. GENERAL BLOCK DIAGRAM(P.125).). 1. ASIC (IC501) Composed mainly of an address decoder and a modem control.
  • Page 125 KX-FP81BX / KX-FP81CX / KX-FP82CX 6.2.1. GENERAL BLOCK DIAGRAM CROSS REFERENCE: 6.7.1. ANALOG UNIT BLOCK DIAGRAM(P.163)

  • Page 126: Control Section

    KX-FP81BX / KX-FP81CX / KX-FP82CX 6.3. CONTROL SECTION 6.3.1. BLOCK DIAGRAM...
  • Page 127 KX-FP81BX / KX-FP81CX / KX-FP82CX 6.3.2. MEMORY MAP...
  • Page 128 KX-FP81BX / KX-FP81CX / KX-FP82CX 6.3.3. ASIC (IC501) This custom IC is used for the general FAX operations. 6. IMAGE DATA RAM: 1. CPU: This memory is programmed into the ASIC and uses 8 KB for the image processing. (See Fig. A.*) This model uses a Z80 equivalent to the CPU operating at 7.
  • Page 129 KX-FP81BX / KX-FP81CX / KX-FP82CX 6.3.4. ROM (IC502) This 512KB ROM (EPROM or MASKROM) carries a common area of 32KB and bank areas which each have 8KB (BK4~BK63). The addresses from 0000H to 7FFFH are for the common area and from 8000H to 9FFFH are for the bank areas.
  • Page 130 KX-FP81BX / KX-FP81CX / KX-FP82CX Descriptions of Pin Distribution (IC501) SIGNAL POWER SUPPLIED DESCRIPTION VOLTAGE AIN1 3.3V CCD IMAGE SIGNAL INPUT AIN2 3.3V THERMISTOR TEMPERATURE WATCH INPUT AIN3 3.3V ----------- AMON 3.3V ANALOG SIGNAL MONITOR TERMINAL VSSB POWER SOURCE (ANALOG GND) VDDB 3.3V...
  • Page 131 KX-FP81BX / KX-FP81CX / KX-FP82CX SIGNAL POWER SUPPLIED DESCRIPTION VOLTAGE XCAS1/IOP DRAM (IC503) CULUM ADDRESS STROBE XCAS2/IOP OUTPUT PORT (MDMRST) XRESCS2 NOT USED CPU DATA BUS 3 CPU DATA BUS 2 CPU DATA BUS 4 CPU DATA BUS 1 CPU DATA BUS 5...
  • Page 132 KX-FP81BX / KX-FP81CX / KX-FP82CX SIGNAL POWER SUPPLIED DESCRIPTION VOLTAGE TXE/IOP MOTOR ENABLE SIGNAL KSTART OPERATION PANEL CONTROL KLATCH OPERATION PANEL CONTROL KSCLK OPERATION PANEL CONTROL KTXD OPERATION PANEL CONTROL KRXD OPERATION PANEL CONTROL ADSEL1 CHANNEL SELECT SIGNAL FOR AIN2...
  • Page 133 KX-FP81BX / KX-FP81CX / KX-FP82CX 6.3.7. RESET CIRCUIT (WATCH DOG TIMER) The output signal from pin 1 of the voltage detect IC (IC509) is input to the ASIC (IC501) 112 pin. Then the output signal from pin 109 of the ASIC (IC501) resets the ASIC.
  • Page 134 KX-FP81BX / KX-FP81CX / KX-FP82CX 6.3.8. SRAM AND RTC BACKUP CIRCUIT 1. Function This unit has a lithium battery (BAT501) which works for the SRAM (IC504) and Real Time Clock IC (RTC: inside IC501). The user parameters for autodial numbers, the system setup data and others are stored in the SRAM (IC504).
  • Page 135 KX-FP81BX / KX-FP81CX / KX-FP82CX 6.3.9. SUPERVISION CIRCUIT FOR THE THERMAL HEAD TEMPERATURE 1. Function The thermistor changes the resistor according to the temperature and uses the thermistor´s characteristics. The output of pin 137 of IC501 becomes a low level. Then when it becomes a high level, it triggers point A In point C, according to the voltage output time, the thermal head´s temperature is detected.

  • Page 136: Facsimile Section

    KX-FP81BX / KX-FP81CX / KX-FP82CX 6.4. FACSIMILE SECTION 6.4.1. IMAGE DATA FLOW DURING FACSIMILE OPERATION Copy (Fine, Super-Fine, Half Tone) 1. Line information is read by CIS (to be used as the reference white level) via route1, and is input to IC501. Refer to 6.4.2.

  • Page 137: Block Diagram

    KX-FP81BX / KX-FP81CX / KX-FP82CX 6.4.2. BLOCK DIAGRAM IC501 IMAGE SYSTEM SENSOR IC503 ANALOG SIGNAL PROCESSING SECTION DRAM IMAGE PROCESSING SECTION IC502 THERMAL HEAD CONVERTER MODEM IC505 TEL. LINE...

  • Page 138: Thermal Head

    KX-FP81BX / KX-FP81CX / KX-FP82CX 6.4.3. THERMAL HEAD 1. Function This unit utilizes the state of the art thermal printer technology. The ink film is chemically processed. The ink film is comprised of two parts: an ink layer and a base film. When the thermalhead contacts this ink film, it emits heat momentarily, and the ink layer is melted and transferred to the paper.
  • Page 139 KX-FP81BX / KX-FP81CX / KX-FP82CX...
  • Page 140 KX-FP81BX / KX-FP81CX / KX-FP82CX 6.4.4. SCANNING BLOCK The scanning block of this device consists of a control circuit and a contact image sensor made up of a celfoc lens array, an LED array, and photoelectric conversion elements. When an original document is inserted and the start button pressed, pin 37 of IC501 goes to a high level and the transistor Q37 turns on.This applies voltage to the LED array to light it.
  • Page 141 KX-FP81BX / KX-FP81CX / KX-FP82CX 6.4.5. STEPPING MOTOR DRIVE CIRCUIT 1. Function The stepping motor works for both transmission and reception. 2. Motor During motor driving, pin 131 of ASIC IC501 becomes a high level, and Q503, Q502 turns ON. As a result, +24V is supplied to the motor coil.
  • Page 142 KX-FP81BX / KX-FP81CX / KX-FP82CX When the motor suspends while it is in the receive mode (about 70~80 msec), pin 131 of ASIC IC501 becomes a low level and Q503 turns OFF. Then Q502 also turns OFF, and instead of +24 V, +5 V is supplied through D501 so that the motor is held in place.

  • Page 143: Gear Section

    KX-FP81BX / KX-FP81CX / KX-FP82CX 6.4.6. GEAR SECTION This model provides a motor-driven gear mechanism for transmitting/copying documents and printing fax data. In this chapter, you will see how the gears work to select and operate a mode and how the gear section, sensors and rollers mechanically work during the main operations (FAX transmission, FAX reception and Copy).
  • Page 144 KX-FP81BX / KX-FP81CX / KX-FP82CX 6.4.6.2. MODE OPERATION Once a mode is selected, the Drive Motor Gear rotates clockwise (CW) and then the controlling positions of Swing Gears A, B and C determine which gears convey their drive power in each mode.
  • Page 145 KX-FP81BX / KX-FP81CX / KX-FP82CX B. Paper-Pickup mode (See Fig. B) : Swing Gear C engages Gear H and provides its power to the Pick up Roller Gear and Platen Idler Gear and Pick up Idler Gear. The Gear drives as follows: Swing Arm C→engaging→Gear H→Platen Idler Gear→Pick up Idler Gear→Pickup roller Gear. The Pickup Roller picks up and pre-feeds a recording paper until the recording paper pushes up the Paper Top sensor* lever.
  • Page 146 KX-FP81BX / KX-FP81CX / KX-FP82CX C. Receive mode (See Fig. C.) : After paper pick up mode, Swing Gear B engages Gear C and conveys its power to the Platen Roller Gear and Ink Ribbon Drive Gear through Platen Drive Gear. Then, the Platen Roller feeds recording paper for printing the received data.
  • Page 147 KX-FP81BX / KX-FP81CX / KX-FP82CX D. Copy mode (See Fig. D.) : Documents pre-feeding →Transmit mode goes → Recording paper feeding → Pick up mode go. Next Swing Gear A and B engages Gear E and Gear C respectively and conveys these power to the Separation Roller Gear and the Platen Roller Gear.
  • Page 148 KX-FP81BX / KX-FP81CX / KX-FP82CX 6.4.6.3. MECHANICAL MOVEMENTS IN THE MAIN OPERATIONS (transmitting documents, receiving faxes and copying) 6.4.6.3.1. IDLE STATUS Note: See “Sensor Locations” in 6.5. SENSORS AND SWITCHES(P.151).
  • Page 149 KX-FP81BX / KX-FP81CX / KX-FP82CX 6.4.6.3.2. TRANSMITTING DOCUMENTS CROSS REFERENCE: 2.3.10. SENSOR SECTION(P.81). 6.4.6.3.3. RECEIVING FAX Note: See “Sensor Locations” in 6.5. SENSORS AND SWITCHES(P.151).
  • Page 150 KX-FP81BX / KX-FP81CX / KX-FP82CX 6.4.6.3.4. COPYING Note: See “Sensor Locations” in 6.5. SENSORS AND SWITCHES(P.151). CROSS REFERENCE: 2.3.10. SENSOR SECTION(P.81)

  • Page 151: Sensors And Switches

    KX-FP81BX / KX-FP81CX / KX-FP82CX 6.5. SENSORS AND SWITCHES All of the sensor and switches are shown below. Sensor Circuit Sensor Sensor or Switch Name Message Error Location Operation Panel SW352 Document set SW [CHECK DOCUMENT] SW353 Document top SW...
  • Page 152 KX-FP81BX / KX-FP81CX / KX-FP82CX 1. [Document top SW (SW353)] When a document is brought to the read position, the SW becomes ON, and the input signal of IC301-16 pin (Operation) becomes a low level. When there is no document at the read position, the SW becomes OFF, and the input signal of IC301-16 pin (Operation) becomes a high level.
  • Page 153 KX-FP81BX / KX-FP81CX / KX-FP82CX 3. [Cover Open/Film End SW (SW501)] When the operation panel cover is closed and a film is set, the SW becomes ON, and the input signal of IC501-43 pin (Digital) becomes a low level. When the cover is opened, the SW becomes OFF, and the input signal of IC501-43 pin (Digital) becomes a high level.
  • Page 154 KX-FP81BX / KX-FP81CX / KX-FP82CX 5. [Paper top Sensor (PS501)] When the recording paper is loaded on the print head, the shelter plate shuts the sensor light, and the photo transistor becomes OFF. The input signal of IC501-44 pin becomes a high level. Usually, the shelter plate is lifted, the photo transistor becomes ON, and the input signal of IC501-44 pin becomes a low level.

  • Page 155: Modem Section

    KX-FP81BX / KX-FP81CX / KX-FP82CX 6.6. MODEM SECTION 6.6.1. FUNCTION The unit uses a 1 chip modem (IC505) that serves as an interface between the control section for FAX transmission and reception and the telephone line. During a transmitting operation, the digital image signals are modulated and sent to the telephone line.
  • Page 156 KX-FP81BX / KX-FP81CX / KX-FP82CX 3. Facsimile Call Time Series As shown in the following diagram, the facsimile call time series is divided into five phases. Phase A : Call setting Call setting can be manual/automatic. Phase B : Pre-message procedure Phase B is a pre-processing procedure and sequence for confirming the status of the terminal, transmission route, etc., and for...
  • Page 157 KX-FP81BX / KX-FP81CX / KX-FP82CX 6. Explanation of Communication and Compression Technology a. G3 Communication Signals (T. 30 Binary Process) For G3 Facsimile communication, this is the procedure for exchanging control signals between the sending and receiving machines both before and after transmission of image signals.
  • Page 158 KX-FP81BX / KX-FP81CX / KX-FP82CX Bit No. DIS/DTC Transmitter --- T.4 operation Receiver --- T.4 operation Receiver --- T.4 operation 11, 12, 13, 14 Data signaling rate Data signaling rate 0, 0, 0, 0 V.27 ter fall back mode 2400 bit/s, V.27 ter 0, 1, 0, 0 V.27 ter...
  • Page 159 KX-FP81BX / KX-FP81CX / KX-FP82CX Bit No. DIS/DTC R16×15.4 lines/mm and/or 400×400 pels/25.4 mm R16×15.4 lines/mm and/or 400×400 pels/25.4 mm Inch based resolution preferred Resolution type selection "0" : neuritic based resolution "1" : inch based resolution Metric based resolution preferred Don’t care...
  • Page 160 KX-FP81BX / KX-FP81CX / KX-FP82CX b. Redundancy Compression Process Coding Mode This unit uses one-dimensional MH format.
  • Page 161 KX-FP81BX / KX-FP81CX / KX-FP82CX 6.6.2. MODEM CIRCUIT OPERATION The modem (IC505) has all the hardware satisfying the ITU-T standards mentioned previously. When the ASIC IC501 (61) is brought to a low level, the modem (IC505) is chip-selected and the resistors inside IC are selected by the select signals from ASIC (IC501) ADR0-ADR4(pin 83~87).

  • Page 162: Description Of Block Diagram In Analog Section

    KX-FP81BX / KX-FP81CX / KX-FP82CX 6.7. DESCRIPTION OF BLOCK DIAGRAM IN ANALOG SECTION 1. Function The analog section serves as an interface between the telephone line. The digital board (IC505) for transmission and reception of FAX signals, switches between the digital board (IC505) and other sections by means of a multiplexer in the NCU section.

  • Page 163: Analog Unit Block Diagram

    KX-FP81BX / KX-FP81CX / KX-FP82CX 6.7.1. ANALOG UNIT BLOCK DIAGRAM...

  • Page 164: Ncu Section

    KX-FP81BX / KX-FP81CX / KX-FP82CX 6.8. NCU SECTION 6.8.1. GENERAL This section is the interface between the telephone line and external telephone. It is composed of an EXT. TEL line relay (RL101), bell detection circuit, pulse dial circuit, TAM interface circuit, line amplifier and sidetone circuits and a multiplexer.
  • Page 165 KX-FP81BX / KX-FP81CX / KX-FP82CX 6.8.5. LINE AMPLIFIER AND SIDE TONE CIRCUIT 1. Circuit Operation The reception signal output from the line transformer T101 is input to pin (2) of IC101 via C136, R111, C111 and R158 and then the signal is amplified at pin (1) of IC101 and sent to the reception system at 11.6dB.

  • Page 166: Its (Integrated Telephone System) And Monitor

    KX-FP81BX / KX-FP81CX / KX-FP82CX 6.9. ITS (Integrated Telephone System) AND MONITOR SECTION 6.9.1. GENERAL During the monitor operation, the speaker output passes through the power amplifier (IC102) [Analog board]. The DTMF signal is output from the modem (IC505: digital board). The alarm tone, the key tone, bell tone, and beep are output from gate array IC501 (digital board).

  • Page 167: Tam Interface Section

    KX-FP81BX / KX-FP81CX / KX-FP82CX 6.10. TAM INTERFACE SECTION 6.10.1. FUNCTION If EXT. TAM is selected in the Receive mode, the unit receives documents for FAX calls or the external TAM records a voice message automatically. To switch between the answering machine and facsimile in the EXT. TAM Mode.
  • Page 168 KX-FP81BX / KX-FP81CX / KX-FP82CX 6.10.2. CIRCUIT OPERATION The TAM INTERFACE circuit consists of an EXT. TAM HOOK detection circuit, CNG signal from the other party’s detection circuit, VOX detection circuit (to judge sound/no-sound) and RL101 (to separate EXT. TAM).

  • Page 169: Operation Board Section

    KX-FP81BX / KX-FP81CX / KX-FP82CX 6.11. OPERATION BOARD SECTION The unit consists of a LCD (Liquid crystal display), KEYs and LEDs (light-emitting diodes). They are controlled by the Gate Array (IC301) and ASIC (IC501: on the DIGITAL BOARD). (Fig.-a) The key matrix table is shown below.

  • Page 170: Lcd Section

    KX-FP81BX / KX-FP81CX / KX-FP82CX 6.12. LCD SECTION The Gate Array (IC301) works only for writing the ASCII code from the data bus (D4~D7). V0 is supplied for the crystal drive. R303(R377) and R305(R379) are density control resistors. Consequently, in this unit, the timing (positive clock) is generated by the LCD interface circuitry in the gate array (IC301).

  • Page 171: Power Supply Board Section

    KX-FP81BX / KX-FP81CX / KX-FP82CX 6.13. POWER SUPPLY BOARD SECTION This power supply board uses the switching regulator method. Block Diagram Input Input Rectifier Circuit C106 R136 Output Circuit Kick-on Surge Circuit R137 Voltage absorber Circuit Converter circuit Circuit A-B Voltage Wave Form...
  • Page 172 KX-FP81BX / KX-FP81CX / KX-FP82CX The following is an overview of how the power supply unit is controlled. The control method of this power supply unit is pulse width modulation. When Q is ON, the energy is charged in the transfer primary coil according to E .
  • Page 173 KX-FP81BX / KX-FP81CX / KX-FP82CX [Surge Absorber Circuit] This circuit is for absorbing surge voltage generated by the transformer. [Control Circuit and Detecting Circuit] The control circuit amplifies the output with increased voltage detected in the error detecting circuit. Then it drives the main transistor.

  • Page 174: Terminal Guide Of The IcｴS Transistors And Diodes

    KX-FP81BX / KX-FP81CX / KX-FP82CX 7 TERMINAL GUIDE OF THE IC´S TRANSISTORS AND DIODES...

  • Page 175: Fixtures And Tools

    KX-FP81BX / KX-FP81CX / KX-FP82CX 8 FIXTURES AND TOOLS...

  • Page 176: Cabinet, Mechanical And Electrical Parts Location

    KX-FP81BX / KX-FP81CX / KX-FP82CX 9 CABINET, MECHANICAL AND ELECTRICAL PARTS LOCATION 9.1. OPERATION PANEL SECTION...

  • Page 177: Upper Cabinet Section

    KX-FP81BX / KX-FP81CX / KX-FP82CX 9.2. UPPER CABINET SECTION...
  • Page 178 KX-FP81BX / KX-FP81CX / KX-FP82CX 9.2.1. BACK COVER SECTION 9.2.1.1. BACK COVER 1...
  • Page 179 KX-FP81BX / KX-FP81CX / KX-FP82CX 9.2.1.2. BACK COVER 2...

  • Page 180: Lower/P.c.b. Section

    KX-FP81BX / KX-FP81CX / KX-FP82CX 9.3. LOWER/P.C.B. SECTION CROSS REFERENCE: 9.1. OPERATION PANEL SECTION(P.176)

  • Page 181: Motor Section

    KX-FP81BX / KX-FP81CX / KX-FP82CX 9.4. MOTOR SECTION 9.5. ACTUAL SIZE OF SCREWS AND WASHER...

  • Page 182: Accessories And Packing Materials

    KX-FP81BX / KX-FP81CX / KX-FP82CX 10 ACCESSORIES AND PACKING MATERIALS...

  • Page 183: Replacement Parts List

    KX-FP81BX / KX-FP81CX / KX-FP82CX 11 REPLACEMENT PARTS LIST This replacement parts list is for KX-FP81BX /KX-FP81CX Ref. Part No. Part Name & Description Remarks / KX-FP82CX only. PFBX1097V1 BUTTON, FUNCTION Refer to the simplified manual (cover) for other areas.

  • Page 184: Digital Board Parts

    KX-FP81BX / KX-FP81CX / KX-FP82CX Ref. Part No. Part Name & Description Remarks 11.2. DIGITAL BOARD PARTS (11.1.5. LOWER CABINET / P.C.B. SECTION) Ref. Part No. Part Name & Description Remarks PFMD1044Z FRAME, BOTTOM PCB1 PFWP1FP81BX DIGITAL BOARD ASS´Y (RTL)
  • Page 185 KX-FP81BX / KX-FP81CX / KX-FP82CX Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks R516 ERDS1VJ152 1.5k R600 ERJ3GEYJ473 R517 ERJ3GEYJ102 R601 ERJ3GEYJ103 R518 ERJ3GEYJ102 R603 ERJ1WYJ391 R519 ERJ3GEYJ473 (CAPACITORS) R520 ERJ3GEYJ473 C502...

  • Page 186: Analog Board Parts

    KX-FP81BX / KX-FP81CX / KX-FP82CX Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks C581 ECUV1C104KBV R118 ERJ3GEYJ224 220k C582 ECUV1H104ZFV R119 ERJ3GEYJ224 220k C583 ECUV1H331JCV 330P R120 ERJ3GEYJ222 2.2k C584 ECUV1H681KBV 680P...

  • Page 187: Power Supply Board Parts

    KX-FP81BX / KX-FP81CX / KX-FP82CX Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks IC301 MN7D032Z9J (TRANSISTORS) (CONNECTOR) Q101 2SK2651 TRANSISTOR(SI) CN301 PQJP11G43Z CONNECTOR,11P (DIODES) (SWITCHES) D101 PFVD1N4005 DIODE(SI) SW352 PFSH1A002Z SWITCH, DOCUMENT TOP...

  • Page 188: Fixtures And Tools

    KX-FP81BX / KX-FP81CX / KX-FP82CX Ref. Part No. Part Name & Description Remarks C202 ECKD3A102KBP 0.001 C203 PFCEA16A470 C204 PFCEA35A47M C205 PFCEA50A47M 0.47 C206 ECKD3A102KBP 0.001 C221 ECUV1E104KBX 11.6. FIXTURES AND TOOLS Ref. Part No. Part Name & Description Remarks...

  • Page 189: For The Schematic Diagrams

    KX-FP81BX / KX-FP81CX / KX-FP82CX 12 FOR THE SCHEMATIC DIAGRAMS Note: 1. DC voltage measurements are taken with an oscilloscope or a tester with a ground. 2. The schematic diagrams and circuit board may be modified at any time with the development of new technology.

  • Page 190: Memo

    KX-FP81BX / KX-FP81CX / KX-FP82CX 12.1. MEMO...

  • Page 191: Printed Circuit Board

    KX-FP81BX / KX-FP81CX / KX-FP82CX 13 PRINTED CIRCUIT BOARD 13.1. DIGITAL BOARD: BOTTOM VIEW (BOTTOM VIEW) R526 SW501 R527 C504 Q509 Q504 IC511 C502 R529 R590 C585 IC506 R588 C579 C528 IC510 IC504 R578 C578 C564 R534 C516 R573 RESET...

  • Page 192: Digital Board: Component View

    KX-FP81BX / KX-FP81CX / KX-FP82CX 13.2. DIGITAL BOARD: COMPONENT VIEW (COMPONENT VIEW) CN501 PS501 C592 C580 CN506 CN505 C501 Q508 +5VA R585 J502 R587 R502 C590 C563 R547 C503 +24V C588 R569 R546 Q501 R594 R597 R591 Q503 R570 C561...

  • Page 193: Analog Board: Bottom View

    KX-FP81BX / KX-FP81CX / KX-FP82CX 13.3. ANALOG BOARD: BOTTOM VIEW (BOTTOM VIEW) PFUP1187Z Q103 L107 C104 C102 L104 L102 L105 L101 L108 C103 R141 L106 L109 R146 R142 R123 R130 C119 C121 C141 R145 Q102 C120 C128 C110 R131 C134...

  • Page 194: Analog Board: Component View

    KX-FP81BX / KX-FP81CX / KX-FP82CX 13.4. ANALOG BOARD: COMPONENT VIEW (COMPONENT VIEW) CN103 CN102 D106 PFUP1187Z RL101 D105 L103 POS101 JJ104 J101 SA101 LF101 JJ105 C101 JJ102 JJ103 JJ106 JJ101 R104 PCB-CH R102 T101 D103 D104 J111 C118 J113 C117...

  • Page 195: Operation Board

    KX-FP81BX / KX-FP81CX / KX-FP82CX 13.5. OPERATION BOARD (COMPONENT VIEW) (BOTTOM VIEW) J321 R378 R377 R379 R303 C366 C311 C365 R305 J323 J322 R386 C314 LED301 R310 R318 J304 C310 R319 R311 J333 C361 LED302 C305 R312 C364 J305 J301...

  • Page 196: Power Supply Board

    KX-FP81BX / KX-FP81CX / KX-FP82CX 13.6. POWER SUPPLY BOARD (COMPONENT VIEW) (BOTTOM VIEW) SRF1018EK R101 R101 T3.15AH 250V C101 C101 F101 T3.15AH 250V F101 D104 D104 D103 D103 D102 D102 C103 D101 D101 C102 C103 C102 R137 R102 R103 R102...

  • Page 197: Schematic Diagram

    KX-FP81BX / KX-FP81CX / KX-FP82CX 14 SCHEMATIC DIAGRAM 14.1. DIGITAL BOARD IC502 +3.3VBAT IC504 A[0] D[0] +5V/BAT +3.3V/BAT A[1] D[1] +3.3V +5VD A[0] D[0] A[2] D[2] +5VBAT C580 A[1] D[1] FAX TX Signal A[3] D[3] A[2] D[2] A[4] D[4] J100P...

  • Page 198: Analog Board

    KX-FP81BX / KX-FP81CX / KX-FP82CX 14.2. ANALOG BOARD R118 220K C115 FAX TX Signal T101-2 J82P FAX RX Signal 2.0V +5VA IC101 HANDSET, MONITOR R158 C111 K0.1 R111 C136 R101 L101 FAX RX T101 JJ103 K0.015 TO TEL LINE 100K...

  • Page 199: Operation Board

    KX-FP81BX / KX-FP81CX / KX-FP82CX 14.3. OPERATION BOARD TO DIGITAL CN301 RESET KSCLK +5V2 TO LCD KTXD CN302 LCD CONTRAST KRXD 1 GND 2 +5V KLATCH KSTART 3 V0 R301 JOG1 1 JOG1 4 RS R376 5 R/W JOG2 2 GND...

  • Page 200: Power Supply Board

    KX-FP81BX / KX-FP81CX / KX-FP82CX 14.4. POWER SUPPLY BOARD Cycle = 12.4 µs T101 Cycle = 12.4 µs TRANS TH101 R107 300K/2 -55V CN301 R104 100K/1 D201 D102 D101 D106 C202 D103 D104 1000p/1K R128 Cycle = 12.4 µs R223...
  • Page 201 KX-FP81BX / KX-FP81CX / KX-FP82CX TN(Q) KXFP81BX KXFP81CX KXFP82CX...

This manual is also suitable for:

Kx-fp81cxKx-fp82cx

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