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Panasonic KX-FC971CX-S Service Manual
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Panasonic KX-FC971CX-S Service Manual

Panasonic KX-FC971CX-S Service Manual

Thermal fax with digital cordless phone
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IMPORTANT INFORMATION ABOUT LEAD FREE, (PbF), SOLDERING
If lead free solder was used in the manufacture of this product the printed circuit boards will be marked PbF.
Standard leaded, (Pb), solder can be used as usual on boards without the PbF mark.
When this mark does appear please read and follow the special instructions described in this manual on the use of PbF and how
it might be permissible to use Pb solder during service and repair work.
Thermal FAX with Digital Cordless Phone
KX-FC971CX-S
KX-FGA521CX-S
Silver Version
(for Asia and Middle Near East)
ORDER NO. KMF0510907CE
© 2005 Panasonic Communications Co., Ltd. All
rights
reserved.
Unauthorized
distribution is a violation of law.
copying
and

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Summary of Contents for Panasonic KX-FC971CX-S

  • Page 1 When this mark does appear please read and follow the special instructions described in this manual on the use of PbF and how it might be permissible to use Pb solder during service and repair work. © 2005 Panasonic Communications Co., Ltd. All rights reserved.

  • Page 2: Table Of Contents

    KX-FC971CX-S / KX-FGA521CX-S CONTENTS Page Page 1 INTRODUCTION 7.13. HOW TO CHECK THE CORDLESS HANDSET 1.1. ABOUT LEAD FREE SOLDER (PbF: Pb free) RECEIVER 1.2. HOW TO RECOGNISE THAT Pb FREE SOLDER IS 8 CIRCUIT OPERATIONS USED 8.1. CONNECTION DIAGRAM 1.3.
  • Page 3 KX-FC971CX-S / KX-FGA521CX-S 15.6. CORDLESS HANDSET BOARD 17.3. OPERATION BOARD 16 FOR THE SCHEMATIC DIAGRAMS 17.4. POWER SUPPLY BOARD 17 SCHEMATIC DIAGRAM 17.5. CORDLESS HANDSET BOARD 17.1. ANALOG BOARD 17.6. CHARGER UNIT BOARD 17.2. DIGITAL BOARD...

  • Page 4: Introduction

    KX-FC971CX-S / KX-FGA521CX-S 1 INTRODUCTION 1.1. ABOUT LEAD FREE SOLDER (PbF: Pb free) Note: In the information below, Pb, the symbol for lead in the periodic table of elements, will refer to standard solder or solder that contains lead. We will use PbF solder when discussing the lead free solder used in our manufacturing process which is made from Tin, (Sn), Silver, (Ag), and Copper, (Cu).

  • Page 5: How To Recognise That Pb Free Solder Is Used

    KX-FC971CX-S / KX-FGA521CX-S 1.2. HOW TO RECOGNISE THAT Pb FREE SOLDER IS USED P.C.Boards marked as “PbF” use Pb Free solder. (See the figure below.) (Example :Digital board) Note : The “PbF” marked may be found on different areas of the same P.C.Board,depending on manufacture date.

  • Page 6: Safety Precautions

    KX-FC971CX-S / KX-FGA521CX-S 1.3. 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 7: Ac Caution

    KX-FC971CX-S / KX-FGA521CX-S 1.7. 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. Wrap the earth lead around the core 5 times. 3. Wrap the AC lead around the core 5 times.

  • Page 8: Service Precautions

    KX-FC971CX-S / KX-FGA521CX-S 1.8.2. 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. CAUTION: AC voltage is supplied to the primary side of the power supply unit. Therefore, always unplug the AC power cord before disassembling for service.

  • Page 9: Features And Specifications

    KX-FC971CX-S / KX-FGA521CX-S 2 FEATURES AND SPECIFICATIONS 2.1. FEATURES General Enhanced Copier Function · LCD (Liquid Crystal Display) readout · 64-Level halftone Facsimile · Automatic document feeder (10 sheets) · Resolution: Standard/Fine/Photo/Super Fine (64 level) · Broad cast Integrated Telephone System ·...

  • Page 10: Specifications

    KX-FC971CX-S / KX-FGA521CX-S 2.3. SPECIFICATIONS 2.3.1. Base unit Applicable Lines: Public Switched Telephone Network Document Size: Max. 216 mm in width Max. 600 mm in length Effective Scanning Width: 208 mm Recording Paper Size: 216 × max. 30 m roll...
  • Page 11 KX-FC971CX-S / KX-FGA521CX-S Note: · Design and specifications are subject to change without notice. · The pictures and illustrations in these instructions may vary slightly from the actual product.

  • Page 12: Location

    KX-FC971CX-S / KX-FGA521CX-S 3 LOCATION 3.1. Overview 3.1.1. Base Unit (1) Speaker (2) Document guides (3) Paper stacker · The paper stacker may not be shown in all illustrations in these operating instructions. (4) Document feeder tray (5) Antenna (6) Top cover...

  • Page 13: Control Panel

    KX-FC971CX-S / KX-FGA521CX-S 3.2. Control Panel 3.2.1. Base Unit Buttons (1) [CALLER ID] (11) [FAX/START] · To use Caller ID features. · To start sending or receiving a fax. (2) [STOP] (12) [COPY] · To stop an operation or programming session.
  • Page 14 KX-FC971CX-S / KX-FGA521CX-S 3.2.2. Cordless Handset Buttons (1) [MENU/SET] (7) Microphone · To initiate programming. · The built-in microphone. · To store a setting during programming. (8) [AUTO ANSWER/EDIT] · To turn the auto answer setting ON/OFF. (2) [TALK] · To make/answer calls.

  • Page 15: Installation

    KX-FC971CX-S / KX-FGA521CX-S 4 INSTALLATION 4.1. 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 16: Connections

    (3) Telephone line cord · Connect to [LINE] jack and a single telephone line jack. CAUTION: (4) [EXT] jack · USE ONLY WITH the included Panasonic AC · Remove the stopper if attached. adaptor. (5) Handset cord · The AC adaptor must remain connected at all times.

  • Page 17: Battery Charge

    Note: · The cordless handset will not operate while it is on the charger. Battery life After your Panasonic battery is fully charged, you can expect the following performance: Operation Operating Time While in use (talking) 7 hours approx.

  • Page 18: Recording Paper

    KX-FC971CX-S / KX-FGA521CX-S 5. Close the top cover securely by pushing down on both 4.4. RECORDING PAPER sides. 1. Open the top cover by pressing the top cover release button (1). 6. Press [FAX/START] to cut the paper. 2. Install the recording paper.

  • Page 19: Documents The Unit Can Send

    KX-FC971CX-S / KX-FGA521CX-S 4.5. DOCUMENTS THE UNIT CAN SEND Note: · Remove clips, staples or other fasteners. · Do not send documents that are on the following types of paper: (Make a copy of the document and send the copy.) —...

  • Page 20: Installling The Battery

    1. Insert the battery, then plug the connector. If “Recharge” is displayed even when the battery has been fully charged, the battery must be replaced. Please use Black lead only Panasonic battery. See OPTIONAL ACCESSORIES Red lead (P.9). Connector Important: ·...

  • Page 21: Setting Your Logo

    KX-FC971CX-S / KX-FGA521CX-S To select characters with the base unit dial keypad 4.8. SETTING YOUR LOGO Your logo will be printed on the top of each page sent from your unit. The logo can be your name or the name of your company.
  • Page 22 KX-FC971CX-S / KX-FGA521CX-S To change uppercase or lowercase letters Pressing the [ ] button will change to uppercase or lowercase letters alternately. 1. Press [2] 2 times. 2. Press [4] 3 times. 3. Press [ 4. Press [5] 3 times.

  • Page 23: Maintenance

    KX-FC971CX-S / KX-FGA521CX-S 5 MAINTENANCE 5.1. MAINTENANCE ITEMS AND COMPONENT LOCATIONS 5.1.1. OUTLINE MAINTENANCE AND REPAIRS ARE PERFORMED USING THE FOLLOWING STEPS. 1. Periodic maintenance Inspect the equipment periodically and if necessary, clean any contaminated parts. 2. Check for breakdowns Look for problems and consider how they arose.
  • Page 24 KX-FC971CX-S / KX-FGA521CX-S 5.1.3. 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 thoroughly. Refer to THERMAL HEAD CLEANING(P.26). Platen Roller If the platen is dirty, clean it with a damp cloth then dry —...

  • Page 25: Jams

    KX-FC971CX-S / KX-FGA521CX-S 5.2. JAMS 5.2.1. Recording Paper Jams 1. Open the top cover by pressing the top cover release button 5. Install the recording paper and close the top cover securely (1). by pushing down on both sides (Refer to RECORDING PAPER (P.18).
  • Page 26 KX-FC971CX-S / KX-FGA521CX-S 5.2.3. DOCUMENT FEEDER/SCANNER 5.2.4. THERMAL HEAD CLEANING GLASS CLEANING If smudges or black/white lines appear on a copied/received document, check whether there is dust on the thermal Clean the document feeder when: head. Clean it to remove the dust.

  • Page 27: Disassembly Instructions

    KX-FC971CX-S / KX-FGA521CX-S 6 DISASSEMBLY INSTRUCTIONS 6.1. DISASSEMBLY FLOW CHART 6.1.1. UPPER CABINET SECTION CROSS REFERENCE: HOW TO REMOVE THE PAPER STACKER (P.29) HOW TO REMOVE THE OPERATION PANEL BLOCK (P.30) HOW TO REMOVE THE OPERATION BOARD, LCD, MICROPHONE UNIT and PLATEN ROLLER (P.31) HOW TO REMOVE THE IMAGE SENSOR (CIS) AND FEED ROLLER (P.33)
  • Page 28 KX-FC971CX-S / KX-FGA521CX-S 6.1.2. LOWER CABINET SECTION CROSS REFERENCE: HOW TO REMOVE THE BOTTOM FRAME (P.36) HOW TO REMOVE THE ANALOG BOARD, DIGITAL BOARD, POWER SUPPLY BOARD AND POWER CORD (P.37) HOW TO REMOVE THE GEAR BLOCK AND SEPARATION ROLLER (P.38) HOW TO REMOVE THE MOTOR OF GEAR BLOCK (P.33)

  • Page 29: Base Unit

    KX-FC971CX-S / KX-FGA521CX-S 6.2. BASE UNIT 6.2.1. HOW TO REMOVE THE PAPER STACKER...
  • Page 30 KX-FC971CX-S / KX-FGA521CX-S 6.2.2. HOW TO REMOVE THE OPERATION PANEL BLOCK...
  • Page 31 KX-FC971CX-S / KX-FGA521CX-S 6.2.3. HOW TO REMOVE THE OPERATION BOARD, LCD, MICROPHONE UNIT and PLATEN ROLLER...
  • Page 32 KX-FC971CX-S / KX-FGA521CX-S 6.2.4. HOW TO REMOVE THE SEPARATION HOLDER AND DOCUMENT FEED SUPPORT...
  • Page 33 KX-FC971CX-S / KX-FGA521CX-S 6.2.5. HOW TO REMOVE THE IMAGE SENSOR (CIS) AND FEED ROLLER...
  • Page 34 KX-FC971CX-S / KX-FGA521CX-S 6.2.6. HOW TO REMOVE THE ANTENNA AND CUTTER UNIT...
  • Page 35 KX-FC971CX-S / KX-FGA521CX-S 6.2.7. HOW TO REMOVE THE LOCK LEVER AND THERMAL HEAD...
  • Page 36 KX-FC971CX-S / KX-FGA521CX-S 6.2.8. HOW TO REMOVE THE BOTTOM FRAME...
  • Page 37 KX-FC971CX-S / KX-FGA521CX-S 6.2.9. HOW TO REMOVE THE ANALOG BOARD, DIGITAL BOARD, POWER SUPPLY BOARD AND POWER CORD...
  • Page 38 KX-FC971CX-S / KX-FGA521CX-S 6.2.10. HOW TO REMOVE THE GEAR BLOCK AND SEPARATION ROLLER 6.2.11. HOW TO REMOVE THE MOTOR OF GEAR BLOCK...
  • Page 39 KX-FC971CX-S / KX-FGA521CX-S 6.2.12. INSTALLATION POSITION OF THE LEAD WIRES...

  • Page 40: Cordless Handset

    KX-FC971CX-S / KX-FGA521CX-S 6.3. CORDLESS HANDSET 6.3.1. HOW TO REMOVE THE BATTERY COVER AND CABINET COVER...
  • Page 41 KX-FC971CX-S / KX-FGA521CX-S...
  • Page 42 KX-FC971CX-S / KX-FGA521CX-S...
  • Page 43 KX-FC971CX-S / KX-FGA521CX-S 6.3.2. HOW TO REMOVE THE CORDLESS HANDSET BOARD.

  • Page 44: Troubleshooting Guide

    KX-FC971CX-S / KX-FGA521CX-S 7 TROUBLESHOOTING GUIDE 7.1. TROUBLESHOOTING SUMMARY 7.1.1. TROUBLESHOOTING After confirming the problem by asking the user, troubleshoot according to the instructions and observe the following precautions. 7.1.2. 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 45: User Recoverable Errors

    KX-FC971CX-S / KX-FGA521CX-S 7.2. USER RECOVERABLE ERRORS If the unit detects a problem, one or more of the following messages will appear on the display. The explanations given in the [ ] are for servicemen only. For fax memory capacity, (Refer to SPECIFICATIONS (P.10)).
  • Page 46 KX-FC971CX-S / KX-FGA521CX-S · The other party´s fax machine is busy or has run out of recording paper. Try again. · The document is jammed. Remove the jammed document. (Refer to Document Jams Sending (P.25).) · Press [STOP] to eject the jammed document.

  • Page 47: Programming And Lists

    KX-FC971CX-S / KX-FGA521CX-S 7.3. 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 48 KX-FC971CX-S / KX-FGA521CX-S 7.3.3. SERVICE FUNCTION TABLE Code Function Set Value Effective Default Remarks Range Pause time 1:SHORT (3S) 1, 2 ---------- 2:LONG (5S) Flash time 1:Type1 1, 2, 3 1: 100 ms 2: 600 ms 3: 300 ms 2:Type2...
  • Page 49 KX-FC971CX-S / KX-FGA521CX-S Code Function Set Value Effective Default Remarks Range Receive error limit check 1: 5% ---------- 2: 10% 3: 15% 4: 20% Transmit level set X dBm -15~00 Selects the FAX transmission level. Refer to Sometime there is a transmit problem (P.72)and Receive Problem (P.73).

  • Page 50: Test Functions

    KX-FC971CX-S / KX-FGA521CX-S 7.4. TEST FUNCTIONS The codes listed below can be used to perform simple checks for 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. To do this, you set the Service mode (Refer to OPERATION FLOW (P.47).) first, then operate the below test items.
  • Page 51 KX-FC971CX-S / KX-FGA521CX-S 7.4.1. DTMF SINGLE TONE TRANSMIT SELECTION When set to ON (=1), the 12 keys and transmission When set to OFF (=2), the 12 keys and transmission frequencies are as shown. frequencies are as shown. High Frequency (Hz)

  • Page 52: Remote Programming

    KX-FC971CX-S / KX-FGA521CX-S 7.5. 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 53 KX-FC971CX-S / KX-FGA521CX-S 7.5.2. PROGRAM MODE TABLE Code Function Set Value Default Remote Setting Set date and time mm/dd/yy hh:mm 01/01/05 Your logo --------- None Your FAX number --------- None Print sending report 1:ON / 2:OFF / 3:ERROR ERROR FAX ring count...
  • Page 54 KX-FC971CX-S / KX-FGA521CX-S Code Function Set Value Default Remote Setting Memory clear except History data --------- --------- Transmit speed select 1:9600/ 2:7200/ 3:4800/ 4:2400 9600bps Receive speed select 1:9600/ 2:7200/ 3:4800/4:2400 9600bps Redial tone detect 1:ON / 2:OFF CPC mode...

  • Page 55: The Example Of The Printed List

    KX-FC971CX-S / KX-FGA521CX-S 7.6. THE EXAMPLE OF THE PRINTED LIST 7.6.1. USER MODE (Example of a printed out list) Note: The above values are the default values.
  • Page 56 KX-FC971CX-S / KX-FGA521CX-S 7.6.2. SERVICE MODE SETTINGS (Example of a printed out list) Note: The above values are the default values.
  • Page 57 KX-FC971CX-S / KX-FGA521CX-S 7.6.3. HISTORY (Example of a printed out list) Note: See the following descriptions of this report. Item No. (1) ~ (44) are corresponding to the listed items in DESCRIPTIONS OF THE HISTORY REPORT (P.58).
  • Page 58 KX-FC971CX-S / KX-FGA521CX-S 7.6.3.1. DESCRIPTIONS OF THE HISTORY REPORT (1) SOFTWARE VERSION (22) NUMBER OF RECEIVE FLASH ROM version The number of pages received. (2) SUM (23) NUMBER OF SENDING FLASH ROM internal data calculation. The number of pages sent.

  • Page 59: Troubleshooting Details

    KX-FC971CX-S / KX-FGA521CX-S 7.7. TROUBLESHOOTING DETAILS 7.7.1. 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 60 KX-FC971CX-S / KX-FGA521CX-S 7.7.3. TROUBLESHOOTING ITEMS TABLE ITEM SYMPTOM REFERENCE No feed. See NO DOCUMENT FEED (P.62) (Auto Document Feeder) Paper jam See DOCUMENT JAM (P.63) Multiple feed See MULTIPLE FEED (P.64) Skew See SKEW (P.65) Printing Skewed receiving image.
  • Page 61 KX-FC971CX-S / KX-FGA521CX-S 7.7.3.1. SIMPLE CHECK LIST SERIAL NO. DATE FUNCTION JUDGEMENT REFERENCE FAX operation Transmission OK / NG Receiving OK / NG Copy operation OK / NG Telephone operation Handset MIC/receiver OK / NG Monitor sound OK / NG...
  • Page 62 KX-FC971CX-S / KX-FGA521CX-S 7.7.4. ADF (AUTO DOCUMENT FEED) SECTION 7.7.4.1. NO DOCUMENT FEED CROSS REFERENCE: TEST FUNCTIONS (P.50) DIGITAL BOARD SECTION (P.92) SENSOR SECTION (P.105) POWER SUPPLY BOARD SECTION (P.101) DISASSEMBLY INSTRUCTIONS (P.27)
  • Page 63 KX-FC971CX-S / KX-FGA521CX-S 7.7.4.2. DOCUMENT JAM CROSS REFERENCE: SENSOR SECTION (P.105) DISASSEMBLY INSTRUCTIONS (P.27)
  • Page 64 KX-FC971CX-S / KX-FGA521CX-S 7.7.4.3. MULTIPLE FEED When using thick paper etc., If the document will not feed. CROSS REFERENCE: DISASSEMBLY INSTRUCTIONS (P.27)
  • Page 65 KX-FC971CX-S / KX-FGA521CX-S 7.7.4.4. SKEW CROSS REFERENCE: DISASSEMBLY INSTRUCTIONS (P.27) HOW TO REMOVE THE SEPARATION HOLDER AND DOCUMENT FEED SUPPORT (P.32)
  • Page 66 KX-FC971CX-S / KX-FGA521CX-S 7.7.4.5. IMAGE IS DISTORTED (WHEN PRINTING) CROSS REFERENCE: THERMAL HEAD SECTION (P.107). TEST FUNCTIONS(P.50) DISASSEMBLY INSTRUCTIONS (P.27)
  • Page 67 KX-FC971CX-S / KX-FGA521CX-S 7.7.4.6. BLACK OR WHITE VERTICAL LINES APPEAR CROSS REFERENCE: TEST FUNCTIONS(P.50) DIGITAL BOARD SECTION (P.92) 7.7.4.7. SKEWED RECEIVING IMAGE...
  • Page 68 KX-FC971CX-S / KX-FGA521CX-S 7.7.4.8. WHEN COPYING OR PRINTING, AN ABNORMAL SOUND IS HEARD FROM THE UNIT...
  • Page 69 KX-FC971CX-S / KX-FGA521CX-S CROSS REFERENCE: DISASSEMBLY INSTRUCTIONS (P.27)
  • Page 70 KX-FC971CX-S / KX-FGA521CX-S 7.7.5. COMMUNICATION SECTION Find the problem in the table shown below, and refer to the corresponding troubleshooting procedure in Defective Facsimile Section (P.71). Symptom Content Possible cause The paper is not fed properly when faxing. Troubleshooting Problem with the feeding (Nor in the copy mode.)
  • Page 71 KX-FC971CX-S / KX-FGA521CX-S 7.7.5.1. Defective Facsimile Section 7.7.5.1.1. Transmit Problem CROSS REFERENCE: MAINTENANCE(P.23) ADF (AUTO DOCUMENT FEED) SECTION(P.62) OPERATION PANEL SECTION(P.104)
  • Page 72 KX-FC971CX-S / KX-FGA521CX-S 7.7.5.1.2. Sometime there is a transmit problem Note: "596: Transmit level set" represents a service code. (Refer to SERVICE FUNCTION TABLE(P.48).)
  • Page 73 KX-FC971CX-S / KX-FGA521CX-S 7.7.5.1.3. 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 SERVICE FUNCTION TABLE(P.48).) Remarks: Regarding the reception problem, we have investigated the conceivable causes in the flow chart except for the software-related errors.
  • Page 74 KX-FC971CX-S / KX-FGA521CX-S 7.7.5.1.4. The unit can copy, but cannot transmit/receive CROSS REFERENCE: ANALOG BOARD SECTION(P.99) TEST FUNCTIONS(P.50)
  • Page 75 KX-FC971CX-S / KX-FGA521CX-S 7.7.5.1.5. The unit can copy, but cannot either transmit/receive long distance or international communications The following two causes can be considered for this symptom. Cause 1: The other party is executing automatic dialing, the call has been received by this unit, and the CED or DIS signal response time is too long.
  • Page 76 KX-FC971CX-S / KX-FGA521CX-S (Causes and Countermeasures) Countermeasure Side Echo Communication Problem Example Countermeasure Service Code Sending side Some time is needed to compare the level Add a dummy signal to the beginning Service code (521) of the receiving and sending signals for the of the training signal.
  • Page 77 KX-FC971CX-S / KX-FGA521CX-S Fig. c (Countermeasure by Changing the Interval Between CED and DIS) Fig. d (C3ountemeasure by Ignoring the 1st DIS) <TX side signal> <RX side signal> <Countermeasure> 2nd / 3rd DCS / Training & delayed CFR / FTT...
  • Page 78 KX-FC971CX-S / KX-FGA521CX-S 7.7.5.1.7. How to record fax signal by using PC Recording FAX signal is one of the useful analysis measures to solve communication problems. The way of recording easily by using PC is shown as follows. 1. Equipment Parts No.
  • Page 79 KX-FC971CX-S / KX-FGA521CX-S 7.7.5.1.8. How to output the journal report 1. Press [MENU] repeatedly to display “PRINT REPORT”. 2. Press [ ] or [ ] until the “JOURNAL REPORT” is displayed. 3. Press [SET]. 4. The report is printed out.
  • Page 80 KX-FC971CX-S / KX-FGA521CX-S...
  • Page 81 KX-FC971CX-S / KX-FGA521CX-S CROSS REFERENCE: TEST FUNCTIONS(P.50)
  • Page 82 KX-FC971CX-S / KX-FGA521CX-S CROSS REFERENCE: TEST FUNCTIONS(P.50)
  • Page 83 KX-FC971CX-S / KX-FGA521CX-S CROSS REFERENCE: TEST FUNCTIONS(P.50)
  • Page 84 KX-FC971CX-S / KX-FGA521CX-S CROSS REFERENCE: TEST FUNCTIONS(P.50)
  • Page 85 KX-FC971CX-S / KX-FGA521CX-S...
  • Page 86 KX-FC971CX-S / KX-FGA521CX-S...
  • Page 87 KX-FC971CX-S / KX-FGA521CX-S CROSS REFERENCE: TEST FUNCTIONS(P.50)
  • Page 88 KX-FC971CX-S / KX-FGA521CX-S 7.7.5.2. 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 89 KX-FC971CX-S / KX-FGA521CX-S 7.7.5.2.1. Journal 2 Refer to JOURNAL 2 in Printout Example(P.90). Journal 2 displays the additional detailed information about the last 30 communications. Descriptions: (1) RCV. MODE Indicates which receive mode the unit was in when the unit received a fax message.
  • Page 90 KX-FC971CX-S / KX-FGA521CX-S 7.7.5.2.2. Journal 3 Refer to JOURNAL 3 in Printout Example (P.90). Descriptions: (6) ENCODE (9) ERROR LINE(RX) Compression Code: MH/MR When an error occurs while receiving a fax, this shows the number of error lines. (7) MSLT (10) MAKER CODE MSLT means Minimum Scan Line Time.
  • Page 91 KX-FC971CX-S / KX-FGA521CX-S...
  • Page 92 KX-FC971CX-S / KX-FGA521CX-S 7.7.6. 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 93 KX-FC971CX-S / KX-FGA521CX-S 7.7.6.1. Digital Block Diagram Digital board is incruding 2 systems. One is the BBIC system, BBIC controls CDL (FHSS) and all analog signals (Telephone, CID and TAM) excepting Fax communications. Another one is Z80 ASIC system for mechanical functions: Copy, Fax and UI (LCD/Key).
  • Page 94 KX-FC971CX-S / KX-FGA521CX-S Z80 ASIC SYSTEM After /RESET is released CPU starts reading the DATA(software program) from Flash memory. CPU reads the data when /RD and /ROMCS are active (low). Waveform-1 shows such a situation.
  • Page 95 KX-FC971CX-S / KX-FGA521CX-S 7.7.6.2. CHECK THE STATUS OF THE DIGITAL BOARD I/O and Pin No. Diagram...
  • Page 96 KX-FC971CX-S / KX-FGA521CX-S After the power is turned on, the ASIC initializes and checks each IC. The ROM, DRAM, 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 97 KX-FC971CX-S / KX-FGA521CX-S Other NG example while the power is ON and the LCD displays the following.
  • Page 98 KX-FC971CX-S / KX-FGA521CX-S 7.7.6.3. NG Example...
  • Page 99 KX-FC971CX-S / KX-FGA521CX-S 7.7.7. 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 100 KX-FC971CX-S / KX-FGA521CX-S 7.7.7.2. Defective fax NCU section 1. No Speakerphone and no monitor reception Perform a signal test in the FAX NCU section and locate a defective point (where the signal disappears) on each route between the microphone and the telephone line (sending), or between the telephone line and the speaker (receiving). Check the components at that point.
  • Page 101 KX-FC971CX-S / KX-FGA521CX-S 7.7.8. POWER SUPPLY BOARD SECTION 7.7.8.1. Key components for troubleshooting Check the following parts first: F101, D101-D104, C106, Q101 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 102 KX-FC971CX-S / KX-FGA521CX-S 7.7.8.2. Troubleshooting Flow Chart...
  • Page 103 KX-FC971CX-S / KX-FGA521CX-S 7.7.8.3. 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 104 KX-FC971CX-S / KX-FGA521CX-S 7.7.9. OPERATION PANEL SECTION 7.7.9.1. No Key Operation CROSS REFERENCE: TEST FUNCTIONS(P.50) 7.7.9.2. No LCD Indication CROSS REFERENCE: TEST FUNCTIONS(P.50)
  • Page 105 KX-FC971CX-S / KX-FGA521CX-S 7.7.10. SENSOR SECTION Refer to SENSORS AND SWITCHES for the circuit descriptions. 7.7.10.1. CHECK THE DOCUMENT SENSOR (SW39)...."CHECK DOCUMENT" 7.7.10.2. CHECK THE READ POSITION (SW38)...."REMOVE DOCUMENT"...
  • Page 106 KX-FC971CX-S / KX-FGA521CX-S 7.7.11. CIS (Contact Image Sensor) SECTION Refer to SCANNING BLOCK(P.140). CROSS REFERENCE: TEST FUNCTIONS(P.50)
  • Page 107 KX-FC971CX-S / KX-FGA521CX-S 7.7.12. THERMAL HEAD SECTION Refer to THERMAL HEAD(P.138).
  • Page 108 KX-FC971CX-S / KX-FGA521CX-S 7.7.13. Cordless Section 7.7.13.1. Check Power of Cordless Handset Note: BBIC is IC1. 7.7.13.2. Check Battery Charge 7.7.13.2.1. Cordless Handset Note: BBIC is IC1. 7.7.13.2.2. Charger Unit...
  • Page 109 KX-FC971CX-S / KX-FGA521CX-S 7.7.13.3. Check Link 7.7.13.3.1. Base Unit (Analog Board) 7.7.13.3.2. Cordless Handset...
  • Page 110 KX-FC971CX-S / KX-FGA521CX-S 7.7.13.4. Check Cordless Handset Transmission 7.7.13.5. Check Cordless Handset Reception 7.7.13.6. Check Curl Cord Handset Transmission 7.7.13.7. Check Curl Cord Handset Reception 7.7.13.8. Check Caller ID...
  • Page 111 KX-FC971CX-S / KX-FGA521CX-S 7.7.13.9. Bell Reception 7.7.13.9.1. Cordless Handset Note: BBIC is IC900. 7.7.13.10. Check DTMF Dial...

  • Page 112: Digital Board (Cordless Base Section) Adjustment

    KX-FC971CX-S / KX-FGA521CX-S 7.8. DIGITAL BOARD (CORDLESS BASE SECTION) ADJUSTMENT When you have replaced EEPROM or BBIC or X’tal, adjustment is necessary. This supplement will explain further details for adjustment. 1. Items as follows are necessary for adjustment. 1-4. Frequency Counter 1-1.
  • Page 113 KX-FC971CX-S / KX-FGA521CX-S 3. Batch Files settings: 4. Commands command function and how to use readid read ID number of Base unit writeid ** ** ** ** ** ** write ID number of Base unit **: ID number, example if ID number is 00010000ff00, input 00 01 00 00 ff 00...
  • Page 114 KX-FC971CX-S / KX-FGA521CX-S 6. Frequency and Voltage adjustment 6-1. Settings and connectings Please connect a Frequency counter to “RFCLK” point on the Digital Board located near the RF unit. Please connect a Digital multimeter to “1.8V_A” or “1.8V_B” point on the Digital Board located near the BBIC.
  • Page 115 KX-FC971CX-S / KX-FGA521CX-S 7.8.1. Adjustment Standard (Base Unit) 7.8.1.1. Component View When connecting the Simulator Equipments for checking, please refer to below. FC: Frequency Counter MM: Multi Meter RSVIO PFUP1480ZA SCLK PCMDO UCTS R252 BBRST PCMCLK JTIO C228 C235 PCMFS...
  • Page 116 KX-FC971CX-S / KX-FGA521CX-S 7.8.1.2. Flow Solder Side View R320 C292 1.8V R253 ADJUST C238 R103 R302 CDL-CH R299 C279 R337 R300 R331 C278 C276 +3.0V R303 R333 R334 C282 R298 R304 R301 R332 R218 R217 C300 C299 C302 R329 R330...

  • Page 117: Cordless Handset Adjustment

    KX-FC971CX-S / KX-FGA521CX-S 7.9. CORDLESS HANDSET ADJUSTMENT When you have replaced EEPROM or BBIC or X’tal, adjustment is necessary. This supplement will explain further details for adjustment. 1. Items as followas are necessary for adjustment. 1-1. PQZZ1CD505E 3 wire Cable: it connect Board and PC.
  • Page 118 KX-FC971CX-S / KX-FGA521CX-S 4. Commands command function and how to use readid read ID number of Base unit writeid ** ** ** ** ** ** write ID number of Base unit **: ID number, example if ID number is 00010000ff00, input 00 01 00 00 ff 00...
  • Page 119 KX-FC971CX-S / KX-FGA521CX-S 6-2. Frequency adjustment 6-3. Voltage adjustment Note: When you write new value to the EEPROM, it is necessary to turn the power off and then power on again. After power on again, Board works with new value you wrote.
  • Page 120 KX-FC971CX-S / KX-FGA521CX-S 7.9.1. Adjustment (Cordless Handset) Please follow the items below when BBIC or EEPROM is replaced. Items Adjustment Point Procedure Check or Replace Parts Audio Check and 1. Link to BASE which is connected to Line Simulator. MIC ROUTE...
  • Page 121 KX-FC971CX-S / KX-FGA521CX-S 7.9.2. Adjustment Standard (Cordless Handset) When connecting the Simulator Equipments for checking, please refer to below.
  • Page 122 KX-FC971CX-S / KX-FGA521CX-S 7.9.3. FREQUENCY TABLE Channel Frequency 2458.0800 Channel Frequency 2458.9440 2401.9200 2459.8080 2402.7840 2460.6720 2403.6480 2461.5360 2404.5120 2462.4000 2405.3760 2463.2640 2406.2400 2464.1280 2407.1040 2464.9920 2407.9680 2465.8560 2408.8320 2466.7200 2409.6960 2467.5840 2410.5600 2468.4480 2411.4240 2469.3120 2412.2880 2470.1760 2413.1520 2471.0400 2414.0160...

  • Page 123: Check (Charger Unit)

    KX-FC971CX-S / KX-FGA521CX-S 7.10. CHECK (Charger Unit) 7.10.1. Check (Charger Unit) Items Adjustment Point Procedure Check or Replace Parts Charging Check 1. Connect Charge Contact 12Ω/2W register between charge+ and charge-. Q1, D1, Q2, R1, R2, L1, 2. Measure and confirm voltage across the regigster is 3.9V ± 0.3V.

  • Page 124: Rf Specification

    KX-FC971CX-S / KX-FGA521CX-S 7.11. RF SPECIFICATION 7.11.1. Base Unit Item Value Refer to -. * Remarks TX Power 20 dBm ~ 25 dBm BBIC Clock -10 Hz ~ +10 Hz 7.11.2. Cordless Handset Item Value Refer to -. * Remarks...

  • Page 125: How To Check The Cordless Handset Receiver

    KX-FC971CX-S / KX-FGA521CX-S 7.13. HOW TO CHECK THE CORDLESS HANDSET RECEIVER 1. Prepare the digital voltmeter, and set the selector knob to ohm meter. 2. Put the probes at the receiver terminals as shown below.

  • Page 126: Circuit Operations

    KX-FC971CX-S / KX-FGA521CX-S 8 CIRCUIT OPERATIONS 8.1. CONNECTION DIAGRAM...

  • Page 127: General Block Diagram

    KX-FC971CX-S / KX-FGA521CX-S 8.2. GENERAL BLOCK DIAGRAM The following is an outline of each device IC on the digital board. (Refer to GENERAL BLOCK DIAGRAM(P.129).). 1. ASIC (IC10) Composed mainly of an address decoder and a modem control. Controls the general FAX operations.
  • Page 128 KX-FC971CX-S / KX-FGA521CX-S Supplies +5V , +8V and +24V to the unit.
  • Page 129 KX-FC971CX-S / KX-FGA521CX-S 8.2.1. GENERAL BLOCK DIAGRAM...

  • Page 130: Control (Facsimile) Section

    KX-FC971CX-S / KX-FGA521CX-S 8.3. CONTROL (Facsimile) SECTION 8.3.1. ASIC (IC10) 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.
  • Page 131 KX-FC971CX-S / KX-FGA521CX-S I/O PORT ASSIGNMENT (IC10) INPUT PORT PIN NO. SIGNAL RESET STATE HOOK PDET XWAIT/IP60 PTOP STBNP FLMDET KRXD/IP KRXD KRXD SWITCHING OUTPUT PIN/INPUT PORT PIN NO. SIGNAL RESET STATE RXE/IP04 HIGH TXE/IP14 HIGH OUTPUT PORT PIN NO.
  • Page 132 KX-FC971CX-S / KX-FGA521CX-S PIN NO. SIGNAL RESET STATE GPO4 GPO4 — GPO3 GPO3 GPO3 GPO2 GPO2 — GPO1 GPO1 — I/O PORT ASSIGNMENT (IC4) PIN NAME DESCRIPTION PIN STATEMENT ASSIGNMENT Pull up or Reset Connection down state NAME P3[7] General purpose...
  • Page 133 KX-FC971CX-S / KX-FGA521CX-S PIN NAME DESCRIPTION PIN STATEMENT ASSIGNMENT Pull up or Reset Connection down state NAME P0[1] General purpose input Data to pull down voltage convert with I/O port UART R/R ,, 3.3V->3.0V P0[0] General purpose UART DATA selectable...
  • Page 134 KX-FC971CX-S / KX-FGA521CX-S 8.3.4. RESET CIRCUIT (WATCH DOG TIMER) The output signal (reset) from pin 4 of the voltage detect IC (IC13) is input to the ASIC (IC10) 114 pin. 1. During a momentary power interruption, a positive reset pulse of 50~70 msec is generated and the system is reset completely.
  • Page 135 KX-FC971CX-S / KX-FGA521CX-S 8.3.5. 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 139 of IC10 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-FC971CX-S / KX-FGA521CX-S 8.4. FACSIMILE SECTION 8.4.1. 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 IC10. Refer to BLOCK DIAGRAM(P.137)
  • Page 137 KX-FC971CX-S / KX-FGA521CX-S 8.4.2. BLOCK DIAGRAM...
  • Page 138 KX-FC971CX-S / KX-FGA521CX-S 8.4.3. 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 momentarily, and black dots (appearing like points) are printed on the paper. If this continues, letters and/or diagrams appear, and the original document is reproduced.
  • Page 139 KX-FC971CX-S / KX-FGA521CX-S...
  • Page 140 KX-FC971CX-S / KX-FGA521CX-S 8.4.4. 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, a light source, and photoelectric conversion elements. When an original document is inserted and the start button pressed, pin 34 of IC10 goes to a high level and the transistor Q21 turns on.This applies voltage to the light source to light it.
  • Page 141 KX-FC971CX-S / KX-FGA521CX-S 8.4.5. STEPPING MOTOR DRIVE CIRCUIT 1. Function One individual stepping motor is used for transmission and reception. It feeds the document or recording paper synchronized for reading or printing. 2. Circuit Operation During motor drive, gate array IC10 pin 124 becomes a high level, and Q13 and Q14 go ON as a result. +24 V is supplied to the motor coil.
  • Page 142 KX-FC971CX-S / KX-FGA521CX-S 8.4.6. GEAR SECTION This section shows how the motor-driven gear mechanism works in the main operations: FAX transmission, FAX reception the motor and copying. 8.4.6.1. MODE SELECTION When the motor attached to the Drive Motor Gear rotates counterclockwise (CCW), Swing Gear A engages the CAM and the CAM turns counterclockwise to select a mode.
  • Page 143 KX-FC971CX-S / KX-FGA521CX-S 8.4.6.2. MODE OPERATION Once a mode is selected, the Drive Motor Gear rotates clockwise (CW) and then the Swing Gear A-1 controls the mode operation. 8.4.6.2.1. TX Mode Swing Gear A engages Gear TX and conveys its drive power to the Separation Roller Gear for pre-feeding documents.
  • Page 144 KX-FC971CX-S / KX-FGA521CX-S 8.4.6.2.3. Copy Mode Swing Gear A and B engage Gears TX and Gears RX respectively and drive both the Separation Roller Gear and the Platen Roller Gear for feeding documents and recording paper in the copying operation.
  • Page 145 KX-FC971CX-S / KX-FGA521CX-S 8.4.6.2.5. Cutter Mode Swing gear C engages the gear cutter and conveys its drive power to cutter unit for cutting recording paper. Fig. F: Cutter mode 8.4.6.3. MECHANICAL MOVEMENTS IN THE MAIN OPERATIONS 8.4.6.3.1. IDLE STATUS CROSS REFERENCE:...
  • Page 146 KX-FC971CX-S / KX-FGA521CX-S 8.4.6.3.2. SCANNING CROSS REFERENCE: SENSOR SECTION (P.105)
  • Page 147 KX-FC971CX-S / KX-FGA521CX-S 8.4.6.3.3. PRINTING Note: See SENSORS AND SWITCHES (P.149).
  • Page 148 KX-FC971CX-S / KX-FGA521CX-S 8.4.6.3.4. COPYING CROSS REFERENCE: SENSOR SECTION (P.105)

  • Page 149: Sensors And Switches

    KX-FC971CX-S / KX-FGA521CX-S 8.5. SENSORS AND SWITCHES All of the sensors and switches are shown below. Sensor Circuit Sensor Sensor or Switch Name Error Message Location DIGITAL Motor Position [CALL SERVICE 2] Cutter Position [PAPER JAMED] ANALOG SW501 Cover Open and Paper set...
  • Page 150 KX-FC971CX-S / KX-FGA521CX-S 8.5.1. MOTOR POSITION SENSOR This sensor is a detection switch for recording the position of the CAM. Digital Board Signal (IC10-43 Pin) Home position Low level Other High level 8.5.2. CUTTER POSITION SENSOR Digital Board Signal (IC10-20 Pin)
  • Page 151 KX-FC971CX-S / KX-FGA521CX-S 8.5.4. HOOK SWITCH (SW500) When the handset is lifted, the switch turns ON, and the signal at pin 19 of IC10 becomes low. When the handset is returned, the switch turns OFF, and the signal at pin 19 of IC10 becomes high.
  • Page 152 KX-FC971CX-S / KX-FGA521CX-S 8.5.6. DOCUMENT TOP SW (SW39) When a document is brought to the read position, the SW becomes ON, and the input signal of IC1-5 pin (Operation) becomes a low level. When there is no document at the read position, the SW becomes OFF, and the input signal of IC1-5 pin (Operation) becomes a high level.

  • Page 153: Modem Section

    KX-FC971CX-S / KX-FGA521CX-S 8.6. MODEM SECTION 8.6.1. FUNCTION The unit uses a 1 chip modem (IC3) 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 154 KX-FC971CX-S / KX-FGA521CX-S 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 terminal control.
  • Page 155 KX-FC971CX-S / KX-FGA521CX-S 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 156 KX-FC971CX-S / KX-FGA521CX-S Bit No. DIS/DTC Reserved for future T.3 operation features. 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...
  • Page 157 KX-FC971CX-S / KX-FGA521CX-S Bit No. DIS/DTC 300×300 pels/25.4 mm 300×300 pels/25.4 mm 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": neritic based resolution "1": inch based resolution Metric based resolution preferred Don’t care...
  • Page 158 KX-FC971CX-S / KX-FGA521CX-S b. Redundancy Compression Process Coding Mode This unit uses one-dimensional MH format.
  • Page 159 KX-FC971CX-S / KX-FGA521CX-S 8.6.2. MODEM CIRCUIT OPERATION The modem (IC3) has all the hardware satisfying the CCITT standards mentioned previously. When the ASIC IC10 (61) is brought to a low level, the modem (IC3) is chip-selected and the resistors inside IC are selected by the select signals from ASIC (IC10) ADR0-ADR4.

  • Page 160: Ncu Section

    KX-FC971CX-S / KX-FGA521CX-S 8.7. NCU SECTION 8.7.1. GENERAL It is composed of bell detection circuit, pulse dial circuit, line amplifier, sidetone circuits. 8.7.2. BELL DETECTION CIRCUIT 1. Circuit Operation The signal waveform for each point is indicated below. The signal (low level section) input to pin 10 of BBIC IC4 on the digital board.
  • Page 161 KX-FC971CX-S / KX-FGA521CX-S 8.7.5. 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 C129, R115 and then the signal is amplified at pin (1) of IC101 and sent to the reception system at through the LPF.
  • Page 162 KX-FC971CX-S / KX-FGA521CX-S...

  • Page 163: Transmitter/Receiver (Cordless)

    KX-FC971CX-S / KX-FGA521CX-S 8.8. Transmitter/Receiver (Cordless) Base Unit and Cordless Handset mainly consist of RF Module and DECT BBIC. Base Unit and Cordless Handset transmit/receive voice signal and data signal through the antenna on carrier frequency.

  • Page 164: Operation Board Section

    (IC1) and ASIC (IC10: on the DIGITAL BOARD). The key matrix table is shown below. (Chip on board type) ASIC CN206 GATE ARRAY IC10 KEYS KIN0~8 MATRIX XLED8, 9 XLED13 READ POSITION SENSOR DOCUMENT SENSOR DIGITAL BOARD OPERATION BOARD KX-FC971CX-S: OPERATION BOARD BLOCK DIAGRAM...

  • Page 165: Lcd Section

    KX-FC971CX-S / KX-FGA521CX-S 8.10. 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, R305, R306 and R307 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 166: Power Supply Board Section

    KX-FC971CX-S / KX-FGA521CX-S 8.11. 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 167 KX-FC971CX-S / KX-FGA521CX-S 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 168 KX-FC971CX-S / KX-FGA521CX-S [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 169: Cordless Section (Base Unit)

    KX-FC971CX-S / KX-FGA521CX-S 8.12. CORDLESS SECTION (BASE UNIT) 8.12.1. Description 8.12.1.1. Frequency The frequency range of 2400MHz~2483.5MHz is used. Transmitting and receiving channel between base unit and handset is same frequency. Refer to FREQUENCY TABLE (P.122). 8.12.1.2. FHSS (Frequency Hopping Spread Spectrum) This telephone is using an IC chip which has similar specification to WDCT (World Digital Cordless Telephone) and is the cordless telephone system that can use multiple portable unit simultaneously.
  • Page 170 KX-FC971CX-S / KX-FGA521CX-S 8.12.1.2.1. TDD Frame Format 8.12.1.2.2. TDMA system This system is the cycles of 10ms, and has four duplex paths, so it is possible to perform four duplex communications simultaneously. In 1 slot 833.3ms, the 10ms of voice data is transmitted.

  • Page 171: Cordless Handset

    KX-FC971CX-S / KX-FGA521CX-S 8.13. CORDLESS HANDSET 8.13.1. BLOCK DIAGRAM back light SCL1 10 P2 [2] KEY 0-4 SDA1 9 STB 0-5 PAON SPEAKER LSRp SYRI SYEN SYDA RF UNIT SYNCL IC904 RXDSG LSRn RECEIVER RSSI BBIC TXDA 3.4VPA IC900 RXDA...
  • Page 172 KX-FC971CX-S / KX-FGA521CX-S 8.13.2. Outline Cordless Handset consists of the following ICs as shown in BLOCK DIAGRAM (P.171). · BBIC (Base Band IC): IC900 − − − − FHSS − − − − All interfaces (ex: Key, Detector Circuit, Charge, DC/DC Converter, EEPROM, LCD) ·...

  • Page 173: Cpu Data (Base Unit)

    KX-FC971CX-S / KX-FGA521CX-S 8.14. CPU DATA (BASE UNIT) 8.14.1. IC2 (BBIC) Pin No Description Connection at Normal mode at Reset mode VDDIO VDDIO O-Hi O-Hi AD10 AD10 O-Hi AD11 AD11 O-Hi AD12 AD12 O-Hi AD13 AD13 O-Hi AD14 AD14 O-Hi...
  • Page 174 KX-FC971CX-S / KX-FGA521CX-S Pin No Description Connection at Normal mode at Reset mode BE1n BE1n O-Hi BE0n BE0n O-Hi SCL2/P3[0] SCL2 O-Hi-Z SDA2 D.I/O SDA2 DAB0 D.I/O DAB0 DAB8 D.I/O DAB8 DAB1 D.I/O DAB1 DAB9 D.I/O DAB9 DAB2 D.I/O DAB2 DAB10 D.I/O...

  • Page 175: Cpu Data (Cordless Handset)

    KX-FC971CX-S / KX-FGA521CX-S 8.15. CPU DATA (CORDLESS HANDSET) 8.15.1. IC1 (BBIC) Pin No Description Connection at Normal mode at Reset mode P3_7/PD7 LCD_A0 P3_1/PD1 RXDSG P3_5/PD5 SPAMP CD P3_4/PD4 D,I/O MIDI ERQ P3_3/PD3 PAON P3_2/PD2 PSEL RFCLK SYRI VDDRF VSSRF ←...
  • Page 176 KX-FC971CX-S / KX-FGA521CX-S Pin No Description Connection at Normal mode at Reset mode ← LDO1_CTRL ← LDO2_CTRL ← VBAT2 ← VBAT1 AVS2 AVD2 LSR+/REF LSR+ LSR-/REF LSR- LSR_HS/CIDIN- LSR_HS VREF_HS/CIDOUT OPEN ← MIC- ← VREF- ← VBUF ← AGND ←...

  • Page 177: Reference Material Data

    KX-FC971CX-S / KX-FGA521CX-S 9 REFERENCE MATERIAL DATA 9.1. TERMINAL GUIDE OF THE ICs TRANSISTORS AND DIODES 9.1.1. Base Unit 9.1.1.1. Digital Board 9.1.1.2. Analog Board...
  • Page 178 KX-FC971CX-S / KX-FGA521CX-S 9.1.1.3. Operation Board 9.1.1.4. Power Supply Board 9.1.2. Cordless Handset...

  • Page 179: How To Replace The Flat Package Ic

    KX-FC971CX-S / KX-FGA521CX-S 9.2. HOW TO REPLACE THE FLAT PACKAGE IC Even if you do not have the special tools (for example, a spot heater) to remove the Flat IC, with some solder (large amount), a soldering iron and a cutter knife, you can easily remove the ICs that have more than 100 pins.
  • Page 180 KX-FC971CX-S / KX-FGA521CX-S 9.2.3. 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 181: Test Chart

    KX-FC971CX-S / KX-FGA521CX-S 9.3. TEST CHART 9.3.1. ITU-T No.1 TEST CHART...
  • Page 182 KX-FC971CX-S / KX-FGA521CX-S 9.3.2. ITU-T No.2 TEST CHART...

  • Page 183: Fixtures And Tools

    KX-FC971CX-S / KX-FGA521CX-S 10 FIXTURES AND TOOLS...

  • Page 184: Cabinet, Mechanical And Electrical Parts Location

    KX-FC971CX-S / KX-FGA521CX-S 11 CABINET, MECHANICAL AND ELECTRICAL PARTS LOCATION 11.1. OPERATION PANEL SECTION...

  • Page 185: Upper Cabinet Section

    KX-FC971CX-S / KX-FGA521CX-S 11.2. UPPER CABINET SECTION...

  • Page 186: Lower Cabinet Section

    KX-FC971CX-S / KX-FGA521CX-S 11.3. LOWER CABINET SECTION...

  • Page 187: Motor Section

    KX-FC971CX-S / KX-FGA521CX-S 11.4. MOTOR SECTION...

  • Page 188: Cordless Handset Section

    KX-FC971CX-S / KX-FGA521CX-S 11.5. CORDLESS HANDSET SECTION...

  • Page 189: Charger Unit Section

    KX-FC971CX-S / KX-FGA521CX-S 11.6. CHARGER UNIT SECTION...

  • Page 190: Actual Size Of Screws

    KX-FC971CX-S / KX-FGA521CX-S 11.7. ACTUAL SIZE OF SCREWS...

  • Page 191: Accessories And Packing Materials

    KX-FC971CX-S / KX-FGA521CX-S 12 ACCESSORIES AND PACKING MATERIALS...

  • Page 192: Accessories And Packing Materials

    KX-FC971CX-S / KX-FGA521CX-S 13 ACCESSORIES AND PACKING MATERIALS 13.1. KX-FGA521CX...

  • Page 193: Replacement Parts List

    KX-FC971CX-S / KX-FGA521CX-S 14 REPLACEMENT PARTS LIST Notes: Ref. Part No. Part Name & Description Remarks 1. The marking (RTL) indicates that the Retention Time is PFDJ1096Z SPACER, PLATEN, L limited for this item. PFDG1015Y SLISER, GEAR PFUS1222Z SLIDERSPRING After the discontinuation of this assembly in production, the...

  • Page 194: Digital Board Parts

    KX-FC971CX-S / KX-FGA521CX-S Ref. Part No. Part Name & Description Remarks 14.1.6. CHARGER UNIT SECTION PFJS09P92X LEAD, POWER Ref. Part No. Part Name & Description Remarks PFDR1072Y POLLER, SEPARATION PFMH1173Z PLATE, POWER SUPPLY KXFGA521CXCS HANDSET CHARGER PFHX1912Z SEET, BOSS 300-1...
  • Page 195 KX-FC971CX-S / KX-FGA521CX-S Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks IC16 PFWI1FC971CX ECJ0EB1A104K IC17 C3ABKC000032 ECJ1VB1C105K IC19 C0CBAYF00016 ECJ0EC1H330J IC22 C3EBHC000030 ECJ0EB1C103K 0.01 IC23 PFWI2FC971CX ECJ0EB1A104K IC25 C0CBCBD00008 C100 ECJ0EF1C104Z C104 ECJ0EB1C103K 0.01...
  • Page 196 KX-FC971CX-S / KX-FGA521CX-S Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks C220 ECJ0EC1H100D ERJ2GE0R00 C221 ECJ0EC1H100D ERJ2GE0R00 C223 ECJ0EC1H100D ERJ3GEYJ100 C224 ECJ0EC1H100D ERJ2GEJ682 6.8K C225 ECJ0EC1H560J ERJ2GEJ183 C227 ECJ0EC1H220J ERJ2GEJ124 120K C228...

  • Page 197: Analog Board Parts

    KX-FC971CX-S / KX-FGA521CX-S Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks R173 ERJ2GEJ101 R103 EVN5ESX50B54 VARIABLE RESISTOR R174 ERJ2GEJ101 R175 ERJ2GEJ101 (COMPONENTS PARTS) R176 ERJ2GEJ101 EXB28V470JX SOLID RESISTOR R179 ERJ2GEJ222 2.2K EXB28V470JX...

  • Page 198: Operation Board Parts

    KX-FC971CX-S / KX-FGA521CX-S Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks C555 F0C2E105A146 R542 ERDS2TJ221 C563 ECJ1VF1H104Z R543 ERDS2TJ121 C564 ECJ1VB1C104K R544 ERJ3GEYJ101 C565 ECJ1VB1H102K 0.001 R548 ERJ3GEYJ103 C566 ECJ1VB1H102K 0.001 R549...

  • Page 199: Cordless Handset

    KX-FC971CX-S / KX-FGA521CX-S Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks ERJ3GEYJ222 2.2K IC901 C0EBF0000424 ERJ3GEYJ271 IC903 C1BB00001024 ERJ3GEYJ4R7 IC905 C3EBJC000017 ERJ3GEYJ101 IC907 C1BB00001021 ERJ3GEYJ101 IC908 C0CBCBC00175 ERJ3GEYJ472 4.7K IC909 C0DBAGF00031 ERJ3GEYJ472 4.7K...

  • Page 200: Charger Unit

    KX-FC971CX-S / KX-FGA521CX-S Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks C965 ECJ0EC1H100D R946 ERJ2GEJ104 100K C966 ECJ0EC1H150J R954 ERJ2GEJ103 C967 ECJ0EC1H100D R955 ERJ3GEYJ103 C968 ECJ0EC1H100D R956 ERJ2GEJ102 C969 ECJ0EC1H100D R957 ERJ2GEJ104...

  • Page 201: Power Supply Board Parts

    KX-FC971CX-S / KX-FGA521CX-S Ref. Part No. Part Name & Description Remarks 14.7. POWER SUPPLY BOARD R229 ERJ3GEYJ183 PARTS (CAPACITORS) Ref. Part No. Part Name & Description Remarks C101 ECQU2A104ML C102 ECQU2A104ML PCB4 N0AC2GJ00005 POWER SUPPLY BOARD ASS´Y C103 PFKDD2GA102M 0.001...

  • Page 202: Printed Circuit Board

    KX-FC971CX-S / KX-FGA521CX-S...
  • Page 203 KX-FC971CX-S / KX-FGA521CX-S...

  • Page 204: Analogue Board

    KX-FC971CX-S / KX-FGA521CX-S C535 PC502 J506 R515 PC503 AUTO-CH SW500 D500 PC500 PCB-CH C543 PC501 PC504 ZNR500 J516 T501 T500 RLY500 J517 D502 D501 J518 D508 J519 J524 FLT500 PFUP1481ZA...
  • Page 205 KX-FC971CX-S / KX-FGA521CX-S Q508 PC502 IC503 Q503 Q506 IC500 Q500 DA502 R521 DA500 Q505 Q502 DA501 PFUP1481ZA...

  • Page 206: Operation Board

    KX-FC971CX-S / KX-FGA521CX-S C20 R23...

  • Page 207: Power Supply Board

    KX-FC971CX-S / KX-FGA521CX-S R224 C205 R223 R225 R227 R226 J204 Q202 Q201 R228 R221 R229 R222 SECONDARY PRIMARY C214 R121 R128 C123 R123 C121 C122 CAUTION FOR CONTINUED PROTECTION AGAINST RISK OF FIRE. REPLACE ONLY WITH SAME TYPE AND RATINGS OF FUSE.

  • Page 208: Charger Unit Board

    KX-FC971CX-S / KX-FGA521CX-S...
  • Page 209 KX-FC971CX-S / KX-FGA521CX-S...
  • Page 210 KX-FC971CX-S / KX-FGA521CX-S 16 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 211 KX-FC971CX-S / KX-FGA521CX-S 17 SCHEMATIC DIAGRAM 17.1. ANALOG BOARD R504 R501 R507 R508 R502 PC500 IC503 R510 PC501 C502 PC503 R512 D500 Q500 Q501 Q503 Q508 IC503 Q507 R575 C513 R539 K820p R528 C530 +5VA R531 C517 K0.1u C531 IC500...
  • Page 212 JJ507 BEAD TO EXT.TEL 250V1u IC501 D505 D506 L521 BEAD R554 T500 FLT500 DA501 1K2A CN502 L516 1 HSMIC- L517 (10) 2 HSSP+ L518 C572 (11) 3 HSSP- L519 (12) 4 HSMIC+ TO HANDSET KX-FC971CX-S : ANALOG BOARD SCHEMATIC DIAGRAM...
  • Page 213 KX-FC971CX-S / KX-FGA521CX-S TO MOTOR TO THERMAL HEAD...
  • Page 214 KX-FC971CX-S / KX-FGA521CX-S...
  • Page 215 KX-FC971CX-S / KX-FGA521CX-S...
  • Page 216 KX-FC971CX-S / KX-FGA521CX-S...
  • Page 217 KX-FC971CX-S / KX-FGA521CX-S...
  • Page 218 KX-FC971CX-S / KX-FGA521CX-S 17.5. CORDLESS HANDSET BOARD CN901 VDD2 VBAT VBATS VBAT 2SB1219ARL 2SB1219ARL Q904 Q911 D903 TP909 R910 MA2J72900L TP910 R909 C917 K0.1u GND2 2SD1819ARL Q907 Q912 R923 Q901 UNR521300L UNR521F00L R902 0.51 ERJ6RQFR51V RECEIVER IC907 VOUT 2 C914 K0.1u...
  • Page 219 SYEN SYD A SYNCL RSSI R961 RSSI 10.368MHz H0D103500006 6.8K X900 (16) TXDA C950 J15p VBAT RFGND C951 RFGND +2.5V RFGND +2.5V +2.5V RFGND TP917 BTX on Q909 Q910 Q903 UNR521M00L Q908 UNR521M00L IC909 +2.5V +2.5V KX-FC971CX-S: CORDLESS HANDSET BOARD...
  • Page 220 KX-FC971CX-S / KX-FGA521CX-S 17.6. CHARGER UNIT BOARD DC7.5V/100mA OUT PUT DC 5V KX-FC971CX-S: CHARGER UNIT BOARD KXFC971CXS...

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