Matsushita Electric KX-T2375MXW Service Manual
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Matsushita Electric KX-T2375MXW Service Manual

Integrated telephone system
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ORDER NO. KM40108849C3
Telephone Equipment
KX-T2375MXW
Integrated Telephone System
White Version
(for Asia, Middle Near East and Other areas)
SPECIFICATIONS
1

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  • Page 1 ORDER NO. KM40108849C3 Telephone Equipment KX-T2375MXW Integrated Telephone System White Version (for Asia, Middle Near East and Other areas) SPECIFICATIONS...
  • Page 2 2001 Kyushu Matsushita Electric Co., Ltd. All rights reserved. Unauthorized copying and distribution is a violation of law.

  • Page 3: Location Of Controls

    1. LOCATION OF CONTROLS 2. DISPLAY...

  • Page 4: Connecting The Handset/Telephone Line Cord

    3. CONNECTION 3.1. Connecting the Handset/Telephone Line Cord After connection, lift the handset to check for a dial tone.

  • Page 5: Connecting A Communication Device

    - 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: Selecting The Dialing Mode

    - Make sure the communication device is not in use before using this unit (making calls, storing phone numbers in memory etc.) or the communication device may not operate properly. 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".

  • Page 7: Time Adjustment

    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

    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.

  • Page 9: Selecting The Ringer Volume

    4.4. Selecting the Ringer Volume You can select the ringer volume to HIGH, LOW or OFF. Your phone comes from the factory set to HIGH. 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.

  • Page 10: Setting The Pin Code

    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)". Your phone comes from the factory set to "600 ms". Make sure that a call is not put on hold.
  • Page 11 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. Before using this feature, we recommend storing an emergency number in the memory of the EMERGENCY button.
  • Page 12 - If you choose not to program emergency numbers, but plan to use the dial lock, any number programmed into the EMERGENCY button can be accessed. 5.4.1. To Set the Dial Lock You can use the following features while the dialing buttons are locked. - Dialing a number you programmed into the memory of the EMERGENCY button.

  • Page 13: Call Restriction

    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. - If your unit is connected to a PBX, this function may not operate.

  • Page 14: How To Release The Establishment Of Dial Lock

    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 15 6. DISASSEMBLY INSTRUCTIONS...

  • Page 16: How To Replace Flat Package Ic

    Ref. No. Procedure Shown in Fig —. To remove —. Remove —. Lower Cabinet Screws (2.6×12) ... . . ( 1 ~ 2 Printed Circuit Board Remove the P.C.Board 7. HOW TO REPLACE FLAT PACKAGE IC 7.1.
  • Page 17 3. Solder employing specified solder to direction of arrow, as sliding the soldering iron. 7.3. Modification Procedure of Bridge 1. Re-solder slightly on bridged portion. 2. Remove remained solder along pins employing soldering iron as shown in below figure. 8. CPU DATA 8.1.

  • Page 18: Speakerphone Ic Data

    8.2. Speakerphone IC Data...
  • Page 19 Description Name A resistor to ground provides a reference current for the transmit and receive attenuators. RTX A resistor to ground determines the nominal gain of the transmit attenuator. The transmit channel gain is inversely proportional to the RTX resistance. Input to the transmit attenuator.

  • Page 20: Terminal Guide Of Ic's Transistors And Diodes

    Description Name Gnd Ground pin for the IC (except the speaker amplifier). XDC Transmit detector output. A resistor and capacitor at this pin hold the system in the transmit mode during pauses between words or phrases. When the XDC pin voltage decays to ground, the attenuators switch from the transmit mode to the idle mode.

  • Page 21: Block Diagram (Ic 1)

    10. BLOCK DIAGRAM 11. BLOCK DIAGRAM (IC 1)

  • Page 22: Module Block Diagram

    11.1. Communication ICs 12. MODULE BLOCK DIAGRAM 12.1. MODULE BLOCK DIAGRAM...

  • Page 23: Circuit Operation

    12.2. CONNECTOR PIN ASSIGNMENT Pin no. signal Function Enable Power Supply (5V) — VLCD LCD Power Input — Power Gnd (0V) — DATA Serial Data Input Write Data H, L Chip Selection H, L 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...

  • Page 24: Speakerphone Circuit

    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. In other words, it can either transmit an outgoing signal or receive an incoming signal at a given time, but cannot do both simultaneously.
  • Page 25 2. Reception signal path: Signals receive from the telephone line are outputted at the speaker via the following path:Tel line Q108 Q109 C112 R600 C603 Pin 27 of IC601 Pin 26 of IC601 Pin 19 of IC601 Pin 15 of IC601 Speaker.

  • Page 26: Tone Detect

    - The receiving signal flows: TEL line POS101 Q101 C113 R125 C108 Q109 Q405 Q406 Speaker - The transmission signal flows Q421 Q424 C435 R437 Q108 Pos101 Tel Line 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.

  • Page 27: Inializing Circuit

    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 operate beyond point A in the circuit voltage diagram.

  • Page 29: Troubleshooting Guide

    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 30: No Ringing Sound When Ring Signal Is Input

    14.4. No Ringing Sound When Ring Signal is Input.

  • Page 31: Cabinet And Electrical Parts Location

    15. CABINET AND ELECTRICAL PARTS LOCATION...

  • Page 33: Accessory And Packing Materials

    16. ACCESSORY AND PACKING MATERIALS 17. REPLACEMENT PARTS LIST This replacement parts list is KX-T2375MXW only. 1. RTL (Retention Time Limited) Note:...
  • Page 34 The marking (RTL) indicates that the Retention Time is limited for this item. After the discontinuation of this assembly in production, the item will continue to be available for a specific period of time. The retention period of availability depends on the type of assembly and the laws governing parts and product retention.
  • Page 35 Ref. No. Part No. Part Name & Description Remarks PQKM10503Z1 UPPER CABINET PQYF10525Z1 LOWER CABINET PQBC10347Z1 BUTTON PQBH10034Z1 BUTTON PQBX10348Z1 BUTTON PQAS57P03Z SPEAKER PQGD10162Z TELEPHONE CARD PQGV10039Z TELEPHONE CARD COVER PQHR10875Z COVER PQKK10105Z1 BATTERY COVER PQKE10070Z3 HANGER PQJC10044Z BATTERY TERMINAL PQJC10045Z BATTERY TERMINAL PQJC313Z...
  • Page 36 Ref. No. Part No. Part Name & Description Remarks Q492 UN5213 TRANSISTOR(SI) Q493 UN5213 TRANSISTOR(SI) Q602 UN5213 TRANSISTOR(SI) Q801 PQVTDTC144TU TRANSISTOR(SI) Q802 PQVTDTC144TU TRANSISTOR(SI) (DIODES) PQVDS1ZB60F1 DIODE(SI) MA4300 DIODE(SI) 1SS119 DIODE(SI) D101 PQVDS1YB60F1 DIODE(SI) D102 MA111 DIODE(SI) D103 MA111 DIODE(SI) D104 MA4180 DIODE(SI)
  • Page 37 Ref. No. Part No. Part Name & Description Remarks R102 ERJ3GEYJ104 100k R103 ERJ3GEYJ104 100k R104 ERJ3GEYJ473 R105 ERJ3GEYJ684 680k R107 ERJ3GEYJ474 470k R108 ERDS2TJ472 4.7k R116 ERJ3GEYJ473 R117 ERJ3GEYJ682 6.8k R118 ERJ3GEYJ103 R119 ERJ3GEYJ104 100k R120 ERJ3GEYJ122 1.2k R121 ERJ3GEYJ103 R123 ERJ3GEYJ330...
  • Page 38 Ref. No. Part No. Part Name & Description Remarks R424 ERJ3GEYJ334 330k R425 ERJ3GEYJ225 2.2M R426 ERJ3GEYJ272 2.7k R427 ERJ3GEYJ121 R428 ERJ3GEYJ562 5.6k R429 ERJ3GEY0R00 R430 ERJ3GEYJ473 R432 ERJ3GEYJ223 R434 ERJ3GEYJ155 1.5M R435 ERJ3GEYJ182 1.8k R436 ERJ3GEYJ681 R437 ERJ3GEYJ153 R438 ERJ3GEYJ473 R439 ERJ3GEYJ153...
  • Page 39 Ref. No. Part No. Part Name & Description Remarks R901 ERJ3GEYJ103 R902 ERJ3GEYJ103 R903 ERJ3GEYJ474 470k R921 ERJ3GEYJ103 R922 ERJ3GEYJ103 R923 ERJ3GEYJ683 D310 PQ4R10XJ000 D311 PQ4R10XJ000 L401 PQ4R18XJ000 ERJ3GEY0R00 ERJ3GEY0R00 J110 ERJ3GEY0R00 J111 ERJ3GEY0R00 J115 ERJ3GEY0R00 J120 PQ4R10XJ000 (CAPACITORS) ECQE2E105KZ ECEA1HU100 ECEA1HUR22 0.22...
  • Page 40 Ref. No. Part No. Part Name & Description Remarks C435 ECUV1C104KBV C438 ECUV1C104KBV C481 ECUV1H103KBV 0.01 C600 ERJ3GEY0R00 C601 ECA0JM102B 0.001 C603 ECUV1H333KBV 0.033 C605 ECUV1E223KBV 0.022 C606 ECUV1C683KBV 0.068 C607 ECUV1C273KBV 0.027 C608 ECUV1C153KBV 0.015 C609 ECUV1C104KBV C610 ECEA1HKA010 C611 ECEA1HKA010 C612...

  • Page 41: For Schematic Diagram

    Ref. No. Part No. Part Name & Description Remarks (ACCESSORIES) PQJA10075Z CORD PQJA212M CORD PQJXC0102Z HANDLE/HANDSET PQKL10038Y1 STAND PQQW12501Z INSTRUCTION BOOK PQQX13090Z INSTRUCTION BOOK (PACKING MATERIALS) PQPH89Y PROTECTION COVER PQPK13449Z GIFT BOX 18. FOR SCHEMATIC DIAGRAM (SCHEMATIC DIAGRAM) 1. DC voltage measurements are taken with electronic voltmeter from negative terminal.
  • Page 42 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 43 IC801 IC302 SP-PHONE...
  • Page 44 IC903 B C E IC601...
  • Page 45 IC601 IC651 (5.8V) Beep IC903 IC801 DTMF Hold Music 3.7V (3.7V)
  • Page 46 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...

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