Panasonic KX-T2375MXW Service Manual
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Panasonic KX-T2375MXW Service Manual

Integrated telephone system
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Telephone Equipment
KX-T2375MXW
Integrated Telephone System
White Version
(for Asia, Middle Near East and other areas)
© 2001 Kyushu Matsushita Electric Co., Ltd. All
rights
reserved.
distribution is a violation of law.
ORDER NO. KM40108849C3
Unauthorized
copying
and

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Summary of Contents for Panasonic KX-T2375MXW

  • Page 1 ORDER NO. KM40108849C3 Telephone Equipment KX-T2375MXW Integrated Telephone System White Version (for Asia, Middle Near East and other areas) © 2001 Kyushu Matsushita Electric Co., Ltd. All rights reserved. Unauthorized copying distribution is a violation of law.

  • Page 2: Table Of Contents

    KX-T2375MXW CONTENTS Page Page 1 LOCATION OF CONTROLS 11.1. Communication ICs 2 DISPLAY 12 MODULE BLOCK DIAGRAM 3 CONNECTION 12.1. MODULE BLOCK DIAGRAM 3.1. Connecting the Handset/Telephone Line Cord 12.2. CONNECTOR PIN ASSIGNMENT 3.2. Connecting a Communication Device 13 CIRCUIT OPERATION 4 SETTINGS 13.1.

  • Page 3: Location Of Controls

    KX-T2375MXW 1 LOCATION OF CONTROLS...

  • Page 4: Display

    KX-T2375MXW 2 DISPLAY...

  • Page 5: Connection

    3.1. Connecting the Handset/Telephone Line Cord After connection, lift the handset to check for a dial tone. · Use only a Panasonic Handset for the KX-T2375MXW. 3.2. Connecting a Communication Device If you connect a communication device (computer, modem, fax, answering machine, etc.) to the telephone line, you can connect it through this unit using the DATA jack.

  • Page 6: Settings

    KX-T2375MXW 4 SETTINGS 4.1. Selecting the Dialing Mode You can select the dialing mode by programming. If you have touch tone service, set to "Tone". If rotary or pulse service is used, set to "Pulse". Your phone comes from the factory set to "Tone".

  • Page 7: Time Adjustment

    KX-T2375MXW 4.2. Time Adjustment You can select AM/PM or 24-hour clock by programming. Make sure that a call is not put on hold.

  • Page 8: Setting The Lcd Contrast

    KX-T2375MXW 4.3. Setting the LCD Contrast You can select the LCD contrast level from 1 to 4 by programming. Your phone comes from the factory set to 3. Make sure that a call is not put on hold. 4.4. Selecting the Ringer Volume...

  • Page 9: Special Features

    KX-T2375MXW 5 SPECIAL FEATURES 5.1. FLASH Button Pressing allows you to use special features of your host PBX such as transferring an extension call or accessing special telephone services (optional) such as call waiting. 5.2. Selecting the Flash Time The flash time depends on your telephone exchange or host PBX. You can select the following flash times: "80, 90, 100, 110, 200, 250, 300, 400, 600, 700 ms (milliseconds)".

  • Page 10: Setting The Pin Code

    KX-T2375MXW 5.3. Setting the Pin Code A 4-digit Pin Code (Personal Identification Number) prevents unauthorized persons from using your unit. The Pin Code is required for the dial lock and call restriction to be set or canceled. The factory preset Pin code is "1111".

  • Page 11: Dial Lock

    KX-T2375MXW 5.4. Dial Lock You can prevent others from making a call to any number except the one pre-programmed in the memory of the EMERGENCY button. Once you locked the dialing buttons, even emergency numbers cannot be dialed. Only incoming calls are accepted until the dial lock is canceled.

  • Page 12: Call Restriction

    KX-T2375MXW 5.5. Call Restriction You can prevent the unit from dialing phone numbers beginning with specified digit(s) (1 digit or 2 digits). Phone numbers with the restricted leading digits cannot be dialed out. 5.5.1. To Set the Call Restriction Make sure that a call is not put on hold.

  • Page 13: How To Release The Establishment Of Dial Lock

    KX-T2375MXW 5.6. How to Release the Establishment of Dial Lock After this procedure, you will be able to establish a new password. How to release the establishment of dial lock.

  • Page 14: Disassembly Instructions

    KX-T2375MXW 6 DISASSEMBLY INSTRUCTIONS Ref. No. Procedure Shown in Fig —. To remove —. Remove —. Lower Cabinet Screws (2.6×12) ... . . (A)×5 1 ~ 2 Printed Circuit Board...

  • Page 15: How To Replace Flat Package Ic

    KX-T2375MXW 7 HOW TO REPLACE FLAT PACKAGE IC 7.1. Preparation · SOLDER Sparkle Solder 115A-1, 115B-1 or Almit Solder KR-19, KR-19RMA · Soldering iron Recommended power consumption will be between 30 W to 40 W. Temperature of Copper Rod 662 ± 50°F (350 ± 10°C) (An expert may handle between 60 ~ 80 W iron, but beginner might damage foil by overheating.)

  • Page 16: Cpu Data

    KX-T2375MXW 8 CPU DATA 8.1. IC801...

  • Page 17: Speakerphone Ic Data

    KX-T2375MXW 8.2. Speakerphone IC Data Name Description A resistor to ground provides a reference current for the transmit and receive attenuators. A resistor to ground determines the nominal gain of the transmit attenuator. The transmit channel gain is inversely proportional to the RTX resistance.

  • Page 18: Terminal Guide Of Ic S Transistors And Diodes

    KX-T2375MXW 9 TERMINAL GUIDE OF IC’S TRANSISTORS AND DIODES...

  • Page 19: Block Diagram

    10 BLOCK DIAGRAM...

  • Page 20: Block Diagram (Ic 1)

    KX-T2375MXW 11 BLOCK DIAGRAM (IC 1) 11.1. Communication ICs...

  • Page 21: Module Block Diagram

    KX-T2375MXW 12 MODULE BLOCK DIAGRAM 12.1. MODULE BLOCK DIAGRAM 12.2. CONNECTOR PIN ASSIGNMENT Pin no. signal Function Enable Power Supply (5V) — VLCD LCD Power Input — Power Gnd (0V) — DATA Serial Data Input H, L → L Write Data H, L →...

  • Page 22: Circuit Operation

    KX-T2375MXW 13 CIRCUIT OPERATION 13.1. Bell Detector Circuit When the bell signal is input between T/R, the signal are outputted at the speaker via the following path: Tel line → R1/C1 → D1 → Pin 1 of IC1 → Pin 8 of IC1 → C6 → T1 → C625 → Speaker 13.2.

  • Page 23: Speakerphone Circuit

    KX-T2375MXW 13.3. Speakerphone Circuit 13.3.1. Function The 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. 13.3.2. Circuit Operation The speakerphone can only provide a one-way communication path.

  • Page 24: Telephone Line Interface

    KX-T2375MXW 13.4. Telephone Line Interface 13.4.1. Circuit operation · On hook Q101 is open, Q101 is connected as to cut DC loop current and cut the voice signal. · Off hook Q101 turns on thus providing an off-hook condition (active DC current flow through the circuit) and the following signal flow id for the DC loop current.

  • Page 25: Tone Detect

    KX-T2375MXW 13.5. Tone Detect This circuit is used to sense the status of the line (busy tone or dial tone) during Auto Redial. 13.5.1. Circuit operation D101 → Q101 → C201 → R201 → R205 → Pin 5 of IC201 → Pin 1 of IC201 → D202 → R208 → Q201...

  • Page 26: Inializing Circuit

    KX-T2375MXW 13.6. Inializing Circuit 13.6.1. Function This circuit is used for to initialize the microcomputer when it incorporates batteries. 13.6.2. Circuit operation When the batteries is inserted into the unit, then the voltage is shifted by D304 and power is supplied to the CPU. The set can...

  • Page 27: Trouble Shooting Guide

    KX-T2375MXW 14 TROUBLE SHOOTING GUIDE 14.1. Service Hints SYMPTOM CURE Dead Check IC801, X801, X802 Can’t hear the voice from handset. Check Q109, Q405, Q406. No voice transmit. Check Q421, Q424, Q108. Can’t tone dial. Check IC801, R921, R922, R923 and C923.

  • Page 28: Tone Dialing Problems (Hnadset)

    KX-T2375MXW 14.3. Tone Dialing Problems (Hnadset) 14.4. No Ringing Sound When Ring Signal is Input.

  • Page 29: Cabinet And Electrical Parts Location

    KX-T2375MXW 15 CABINET AND ELECTRICAL PARTS LOCATION...

  • Page 30: Accessory And Packing Materials

    KX-T2375MXW 16 ACCESSORY AND PACKING MATERIALS...

  • Page 31: Replacement Parts List

    Part No. Part Name & Description Remarks PQKK10105Z1 BATTERY COVER LIST PQKE10070Z3 HANGER PQJC10044Z BATTERY TERMINAL This replacement parts list is KX-T2375MXW only. PQJC10045Z BATTERY TERMINAL PQJC313Z BATTERY TERMINAL 1. RTL (Retention Time Limited) PQJC314Z BATTERY TERMINAL Note: PQQT22058Z INDICATION LABEL...
  • Page 32 KX-T2375MXW Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks (JACKS) R409 ERJ3GEYJ223 JJ101 PQJJ1T020Z JACK R410 ERJ3GEYJ474 470k JJ102 PQJJ1T020Z JACK R411 ERJ3GEYJ681 Handse PQJJ1T030Z JACK R412 ERJ3GEYJ682 6.8k CN401 PQJJ1C001Z JACK...

  • Page 33: Accessories And Packing Materials

    KX-T2375MXW Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks J111 ERJ3GEY0R00 C805 ECUV1C104ZFV J115 ERJ3GEY0R00 C806 ECUV1H102KBV 0.001 J120 PQ4R10XJ000 C901 ECEA1CKA100 (CAPACITORS) C902 ECUV1H472KBV 0.0047 ECQE2E105KZ C903 ECUV1H103KBV 0.01 ECEA1HU100 C904 ECUV1H103KBV 0.01...

  • Page 34: For Schematic Diagram (Schematic Diagram)

    KX-T2375MXW 18 FOR SCHEMATIC DIAGRAM (SCHEMATIC DIAGRAM) 1. DC voltage measurements are taken with electronic voltmeter from negative terminal. (Add 40 mA to telephone line from the loop simulator.) 2. This schematic diagram may be modified at any time with the development of new technology.

  • Page 35: Memo

    KX-T2375MXW 18.1. MEMO...

  • Page 36: Schematic Diagram

    KX-T2375MXW 19 SCHEMATIC DIAGRAM IC601 IC651 (5.8V) Beep IC903 IC801 DTMF Hold Music 3.7V (3.7V)
  • Page 37 IC303 (5.7V) The voltage during ON-Hook is indicated. ) shows the voltage during OFF-Hook. Headset Set & Headset Set Incoming Signal Speaker Phone Incoming Signal Headset Set & Headset Set Outgoing Signal Speaker Phone Outgoing Signal KX-T2375MXW : SCHEMATIC DIAGRAM...
  • Page 38 KX-T2375MXW...

  • Page 39: Circuit Board And Wiring Connection Diagram

    KX-T2375MXW KXT2375MXW Printed in Japan...

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