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Panasonic KX-T7730X Service Manual

Proprietary telephone.
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PROPRIETARY TELEPHONE
KX-T7730X
(for Asia, Middle Near East, Africa and Latin America)
© 2001 Kyushu Matsushita Electric Co., Ltd. All
rights
reserved.
distribution is a violation of law.
ORDER NO. KMS0110592C3
Unauthorized
copying
and

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Table of Contents

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   Summary of Contents for Panasonic KX-T7730X

  • Page 1 ORDER NO. KMS0110592C3 PROPRIETARY TELEPHONE KX-T7730X (for Asia, Middle Near East, Africa and Latin America) © 2001 Kyushu Matsushita Electric Co., Ltd. All rights reserved. Unauthorized copying distribution is a violation of law.
  • Page 2: Table Of Contents

    KX-T7730X CONTENTS Page Page 1 INTRODUCTION 8.5. THE ELECTRONIC VOLUME OF THE SPEAKER-PHONE 1.1. NOTE DOES NOT WORK 1.2. FOR SERVICE TECHNICIANS 8.6. THE ELECTRONIC VOLUME OF HANDSET DOES NOT 2 LOCATION OF CONTROLS WORK 3 CONNECTION 9 TERMINAL GUIDE OF ICS, TRANSISTORS AND DIODES...
  • Page 3: Introduction

    KX-T7730X 1 INTRODUCTION 1.1. NOTE When you note the serial number, write down all of the 11 digits. The serial number may be found on the label affixed to the bottom of the unit. 1.2. FOR SERVICE TECHNICIANS ICs and LSIs are vulnerable to static electricity.
  • Page 4: Location Of Controls

    KX-T7730X 2 LOCATION OF CONTROLS...
  • Page 5: Connection

    KX-T7730X 3 CONNECTION Caution: Ensure the cord is inserted in the groove to prevent damage to the connector.
  • Page 6: Disassembly Instructions

    KX-T7730X 4 DISASSEMBLY INSTRUCTIONS 1. Remove the Stand. 2. Remove 4 Screws (A). 3. Remove the Bottom Cabinet. 4. Remove the Connector (1~3) and the Flat Cable from the Main Board.
  • Page 7 KX-T7730X 5. Remove 2 Screws (A). 6. Remove the Main Board from the Top Cabinet. 7. Remove the Cable from the Main Board. 8. Remove the LCD Holder by sliding the Hook in the direction of the arrow from the Main Board.
  • Page 8: Ic Data

    KX-T7730X 5 IC DATA Pin No. Terminal Name I/O Function I/O Setting Description LCD linage H:3line Model L:Other TEST Vcc Connection OSC1 4MHz OSC2 4MHz RESET Not used Vcc Connection Open HS SM mute HF MM mute O( I ) HF SM mute(This is also model code.)
  • Page 9 KX-T7730X Pin No. Terminal Name I/O Function I/O Setting Description LCD_CLK O( I ) LCD_STB/(Model Code) LCD_DO LED0 LED1 LED2 LED3 LED4 LED5 LED6 LED7 HF SP vol 1 HF SP vol 2 HF SP vol 3 HF SP vol 4...
  • Page 10: Block Diagram

    BRIDGE CIRCUIT (D1) (Q3) Handset Amp HEADSET (Q5,Q8) HANDSET DTMF RINGER DIODE POWER BRIDGE REGULATOR (D2) (IC7) LCD Module SIGNAL TRANSMITTING CIRCUIT(Q101) (IC2) SIGNAL RECEIVING CIRCUIT(Q102) (IC1) DRIVING CIRCUIT RESET IC (Q103,Q104) (IC9) USD PRIVING CIRCUIT (Q105~108) KX-T7730X MAIN BOARD...
  • Page 11: Circuit Operations

    KX-T7730X 7 CIRCUIT OPERATIONS 7.1. KEY INPUT CONTROL CIRCUIT Sequential input information is executed by dynamic scanning. The ports R20~R23, R30, R31 of IC1 are brought to high status consecutively. If a key is pressed, the key-in information input is executed by ports R00~R03, R10~R13.
  • Page 12: Led Circuit

    KX-T7730X 7.2. LED CIRCUIT Circuit Operation: The LED executes dynamic lighting for the status indicators, and control is executed by the output ports R20~R23, R60~R63, R70~R73.
  • Page 13: Data Communication Circuit

    KX-T7730X 7.3. DATA COMMUNICATION CIRCUIT Function: The data communication circuit serves the following functions: Information exchanger between the PBX and proprietary telephone, key input information as well as data for the LED control, LCD control, etc. This information is continuously exchanged at all times.
  • Page 14: Tone Generation Circuit

    KX-T7730X 7.4. TONE GENERATION CIRCUIT Function: This circuit generates all system tones including COL, extension, busy, DTMF signals and key in confirmation tones during the power failure mode and is comprised of IC1(DTMF Generator) and IC5 (Analog Switch). Circuit Operation: For an output of a single row tone, the row terminal and the each column terminals intersecting with it are required to be brought a low state.
  • Page 15: Handset Circuit

    KX-T7730X 7.5. HANDSET CIRCUIT 1) Transmission Signal Path The input signal for the handset microphone is sent through the telephone line via the following path: Handset MIC(JK2) → JK3 → C24 → R26 → C34 → Q5 → C21 → R21 → Q3 → C4 → T1 → C3 → Q1 → D1 → Telephone Line...
  • Page 16: Speakerphone Circuit

    KX-T7730X 7.6. SPEAKERPHONE CIRCUIT Function: This circuit controls the automatic switching of the transmitted and received signals to and from the telephone line, when the unit is used in the hands-free mode. Circuit Operation: The speakerphone can only provide a one-way communication path at a given time, but cannot do both simultaneously.
  • Page 17 KX-T7730X...
  • Page 18: Troubleshooting Guide

    KX-T7730X 8 TROUBLESHOOTING GUIDE 8.1. NO OPERATION...
  • Page 19: Handset Trouble

    KX-T7730X 8.2. HANDSET TROUBLE...
  • Page 20: Speaker-phone Trouble

    KX-T7730X 8.3. SPEAKER-PHONE TROUBLE 8.4. TONE DIAL TORUBLE...
  • Page 21: The Electronic Volume Of The Speaker-phone Does Not Work

    KX-T7730X 8.5. THE ELECTRONIC VOLUME OF THE SPEAKER-PHONE DOES NOT WORK 8.6. THE ELECTRONIC VOLUME OF HANDSET DOES NOT WORK...
  • Page 22: Terminal Guide Of Ics, Transistors And Diodes

    KX-T7730X 9 TERMINAL GUIDE OF ICS, TRANSISTORS AND DIODES...
  • Page 23: How To Replace The Flat Package Ic

    KX-T7730X 10 HOW TO REPLACE THE FLAT PACKAGE IC If you do not have the special tools (for example: SPOT HEATER) to remove the SPOT HEATER’S Flat IC, If you have solder (large amount) a soldering iron and a cutter knife, you can easily remove IC’s even though large than 100 pin.
  • Page 24: Flat Package Ic Installation Procedure

    KX-T7730X 10.3. FLAT PACKAGE IC INSTALLATION PROCEDURE 1. Temporary fix FLAT PACKAGE IC by soldering on two marked pins. *Check the accuracy of the IC setting with the corresponding soldering foil. 2. Apply flux for all pins of FLAT PACKAGE IC.
  • Page 25: Cabinet And Electrical Parts Location

    KX-T7730X 11 CABINET AND ELECTRICAL PARTS LOCATION...
  • Page 26: Accessories And Packing Materials

    KX-T7730X 12 ACCESSORIES AND PACKING MATERIALS...
  • Page 27: Replacement Parts List

    KX-T7730X 13 REPLACEMENT PARTS LIST Note: Ref. Part No. Part Name & Remarks Description 1. RTL (Retention Time Limited) PSUS1018Z SPRING The marking (RTL) indicates that the Retention Time is PSBH1007Z1 BUTTON, HOOK PC+ABS-94HB PSHG1122Z RUBBER PARTS, MIC limited for this item.
  • Page 28 KX-T7730X Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks PSVTUMG2NTR TRANSISTOR(SI) ECUV1H102KBV 0.001 B1ABGB000020 TRANSISTOR(SI) ECUV1H821KBV 820p B1ABGB000020 TRANSISTOR(SI) ECUV1C224KBV 0.22 PSVTUMG2NTR TRANSISTOR(SI) ECEV0JA101 PSVTUMG2NTR TRANSISTOR(SI) UN5213 TRANSISTOR(SI) ECUV1H222KBV 0.0022 UN5213 TRANSISTOR(SI) ECUV1C473KBV 0.047...
  • Page 29 KX-T7730X Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks C109 ECUV1H120JCV ERJ3GEY0R00 C110 ECUV1C104ZFV ERJ3GEYJ224 220k ERJ3GEYJ124 120k C201 PSCEV1HA100 ERJ3GEYJ563 C203 PSCEV1EA470S C204 ECUV1C104ZFV ERJ3GEYJ273 C205 ECEV0JA101 ERJ3GEYJ473 C206 PSCEV0JA102 1000...
  • Page 30 KX-T7730X Ref. Part No. Part Name & Description Remarks (PHOTO ELECTRIC TRANSDUCER) 0N3181 PHOTO COUPLER (SWITCH) PSSS3A101Z SWITCH (TRANSFORMERS) G5A1A0000003 TRANSFORMER PSLT9Z4A TRANSFORMER (CRYSTAL OSCILLATOR) H0J400400011 CRYSTAL OSCILLATOR...
  • Page 31: For The Schematic Diagram

    KX-T7730X 14 FOR THE SCHEMATIC DIAGRAM 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 32: Schematic Diagram

    FWD/DND MUTE STORE HS_MUTE SW52 SP_RX_MUTE L[7] R138 HOOK K[7] SP-PHONE SP_TX_MUTE R139 HS_POWER R140 SP_POWER R141 The handset is in use Q103 5.4V : Q103 The speakerphone is in use 0V : Q104 Q104 4.7K KX-T7730X MAIN BOARD NO.1...
  • Page 33 5.4V SCK/E 11 D2 C105 5.2V Z0.01 12 D3 13 D4 R128 5.4V C110 14 D5 Z0.1 5.4V 15 D9 SW42 16 D10 R127 R126 R125 HOLD 2.2K 2.2K Q109 R152 Z0.01 5.1V 5.4V 5.4V 5.4V KX-T7730X MAIN BOARD NO.2...
  • Page 34: Printed Circuit Board (main Board)

    R10 R16 R151 R137 R141 R140 Q109 R139 R138 IC10 R124 R208 R123 C106 C108 R153 R122 C102 C103 C201 R107 Q102 R205 Q201 R204 R202 Q202 R207 R42 R43 C66 C67 30 G2 PSUP1382Z-A KX-T7730X MAIN BOARD COMPONENT VIEW PSUP1382Z...
  • Page 35: Bottom View

    SW11 CO11 SW12 PAUSE INTERCOM CONF FWD/DND CO10 SW13 AUTO ANS AUTO DIAL TRANSFER SW14 FLASH MUTE SW17 STORE SW18 SW19 SW46 SW20 SW23 SW24 SW25 SW26 SW50 SW43 SW48 REDIAL HOLD SP-PHONE KX-T7730X MAIN BOARD BOTTOM VIEW PSUP1382Z A,KXT7730X...

Comments to this Manuals

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Latest comments:
  • Admalik Malik Sep 01, 2018 08:38:
    Please send me user programmin​g page
  • Ad Malik Sep 01, 2018 08:00:
    We want to check incoming calls please gide program
  • RICK Dec 01, 2016 03:04:
    reply to:rickamb​anje@gmail​.com

    i have a panasonic handset KX-T7730 X which is havinh a problem of displaying restricted when I select CO line
    i am no longer able to call