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Panasonic KX-T7730CA Service Manual
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Panasonic KX-T7730CA Service Manual

Proprietary telephone for kazakhstan, uzbekistan, kyrgyzstan, tajikistan and turkmenistan
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All manuals and user guides at all-guides.com
Proprietary Telephone
KX-T7730CA
Model No.
(for Kazakhstan, Uzbekistan, Kyrgyzstan, Tajikistan
and Turkmenistan)
© 2008 Panasonic Communications Co., Ltd. All
rights reserved. Unauthorized copying and distribu-
tion is a violation of law.
ORDER NO. KMS0804481CE

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  • Page 1 All manuals and user guides at all-guides.com ORDER NO. KMS0804481CE Proprietary Telephone KX-T7730CA Model No. (for Kazakhstan, Uzbekistan, Kyrgyzstan, Tajikistan and Turkmenistan) © 2008 Panasonic Communications Co., Ltd. All rights reserved. Unauthorized copying and distribu- tion is a violation of law.

  • Page 2: Table Of Contents

    All manuals and user guides at all-guides.com KX-T7730CA TABLE OF CONTENTS PAGE PAGE 1 Safety Precautions ------------------------------------------- ---3 1.1. For Service Technicians ----------------------------- ---3 2 Warning ---------------------------------------------------------- ---3 2.1. About Lead Free Solder (PbF: Pb free) ---------- ---3 3 Specifications -------------------------------------------------- ---4 4 Technical Descriptions-------------------------------------- ---5 4.1.

  • Page 3: Safety Precautions

    All manuals and user guides at all-guides.com KX-T7730CA 1 Safety Precautions 1.1. For Service Technicians • Repair service shall be provided in accordance with repair technology information such as service manual so as to prevent fires, injury or electric shock, which can be caused by improper repair work.

  • Page 4: Specifications

    All manuals and user guides at all-guides.com KX-T7730CA 3 Specifications Item Outline Specification Station Loop Limit 40 ohms Cabling Method 2 pair wire Jacks Handset Jack, TEL Jack, Headset Jack Display 16 digits (max.) Dimensions 183 mm (W) x 107 mm (H)x218 mm (D) with handset (Low Angle)

  • Page 5: Technical Descriptions

    All manuals and user guides at all-guides.com KX-T7730CA 4 Technical Descriptions 4.1. Block Diagram...

  • Page 6: Circuit Operations

    All manuals and user guides at all-guides.com KX-T7730CA 4.2. Circuit Operations 4.2.1. 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 7 All manuals and user guides at all-guides.com KX-T7730CA 4.2.2. 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 8 All manuals and user guides at all-guides.com KX-T7730CA 4.2.3. 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.
  • Page 9 All manuals and user guides at all-guides.com KX-T7730CA TONE Generation Circuit 4.2.4. 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).
  • Page 10 All manuals and user guides at all-guides.com KX-T7730CA Handset Circuit 4.2.5. 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 2.
  • Page 11 All manuals and user guides at all-guides.com KX-T7730CA Speakerphone Circuit 4.2.6. 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 12 All manuals and user guides at all-guides.com KX-T7730CA...

  • Page 13: Location Of Controls And Components

    All manuals and user guides at all-guides.com KX-T7730CA 5 Location of Controls and Components...

  • Page 14: Installation Instructions

    All manuals and user guides at all-guides.com KX-T7730CA 6 Installation Instructions 6.1. Connection Caution: Ensure the cord is inserted in the groove to prevent damage to the connector.

  • Page 15: Troubleshooting Guide

    All manuals and user guides at all-guides.com KX-T7730CA 7 Troubleshooting Guide 7.1. No Operation...

  • Page 16: Handset Trouble

    All manuals and user guides at all-guides.com KX-T7730CA 7.2. Handset Trouble...

  • Page 17: Speaker-Phone Trouble

    All manuals and user guides at all-guides.com KX-T7730CA 7.3. Speaker-Phone Trouble 7.4. TONE Dial Trouble...

  • Page 18: The Electronic Volume Of The Speaker-Phone Does Not Work

    All manuals and user guides at all-guides.com KX-T7730CA 7.5. The Electronic Volume of the Speaker-Phone Does Not Work 7.6. The Electronic Volume of Handset Does Not Work...

  • Page 19: Disassembly And Assembly Instructions

    All manuals and user guides at all-guides.com KX-T7730CA 8 Disassembly and Assembly Instructions 1. Remove the Stand. 2. Remove 4 Screws (A). 3. Remove the Bottom Cabinet. 4. Remove the Flat Cable from the Main Board.
  • Page 20 All manuals and user guides at all-guides.com KX-T7730CA 5. Remove 5 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...

  • Page 21: Miscellaneous

    All manuals and user guides at all-guides.com KX-T7730CA 9 Miscellaneous 9.1. Terminal Guide of ICs, Transistors and Diodes...

  • Page 22: How To Replace A Flat Package Ic

    All manuals and user guides at all-guides.com KX-T7730CA 9.2. How To Replace a Flat Package 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 sol- dering iron and a cutter knife, you can easily remove the ICs that have more than 100 pins.

  • Page 23: Memo

    All manuals and user guides at all-guides.com KX-T7730CA 9.3. Memo...

  • Page 24: Schematic Diagram

    MUTE STORE HS_MUTE SW52 SP_RX_MUTE L[7] R138 K[7] HOOK SP_TX_MUTE SP-PHONE Q108 R139 HS_POWER R140 SP_POWER R141 Q103 The handset is in use 5.4V : 4.7K Q103 The speakerphone is in use 0V : Q104 Q104 KX-T7730CA MAIN BOARD NO.1...
  • Page 25 11 D2 C105 5.2V 12 D3 Z0.01 13 D4 R128 5.4V C110 14 D5 Z0.1 TP195 5.4V 15 D9 R127 R126 SW42 16 D10 2.2K R125 HOLD 2.2K TP197 TP196 Q109 R152 5.1V 5.4V Z0.01 5.4V 5.4V KX-T7730CA MAIN BOARD NO.2...

  • Page 26: Printed Circuit Board

    All manuals and user guides at all-guides.com KX-T7730CA 11 Printed Circuit Board 11.1. Component View R125 C110 Q104 Q103 R128 R137 Q109 R141 R140 R99 D3 R139 R138 IC10 R124 R123 C109 C103 Q102 R207 C66 C67 PSUP1382Z -A KX-T7730CA MAIN BOARD COMPONENT VIEW...

  • Page 27: Bottom View

    PAUSE FWD/DND CO10 SW13 AUTO ANS AUTO DIAL TRANSFER FLASH SW14 MUTE SW17 STORE SW18 SW19 SW20 SW46 SW23 SW24 SW25 SW33 SW26 SW50 SW43 SW48 REDIAL HOLD SP-PHONE KX-T7730CA MAIN BOARD BOTTOM VIEW 12 Appendix Information of Schematic Diagram...

  • Page 28: Exploded View And Replacement Parts List

    All manuals and user guides at all-guides.com KX-T7730CA 13 Exploded View and Replacement Parts List 13.1. IC1 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...
  • Page 29 All manuals and user guides at all-guides.com KX-T7730CA Pin No. Terminal Name I/O Function I/O Setting Description LED2 LED3 LED4 LED5 LED6 LED7 HF SP vol 1 HF SP vol 2 HF SP vol 3 HF SP vol 4 Tone cont 1...

  • Page 30: Cabinet And Electrical Parts Location

    All manuals and user guides at all-guides.com KX-T7730CA 13.2. Cabinet and Electrical Parts Location...

  • Page 31: Accessories And Packing Materials

    All manuals and user guides at all-guides.com KX-T7730CA 13.3. Accessories and Packing Materials...

  • Page 32: Replacement Parts List

    All manuals and user guides at all-guides.com KX-T7730CA 13.4. Replacement Parts List Note: Ref. Part No. Part Name & Description Remarks 1. RTL (Retention Time Limited) L0CBAB000065 MICROPHONE The "RTL" marking indicates that its Retention Time is PSBX1102Z1 BUTTON, SP PHONE ABS- Limited.
  • Page 33 All manuals and user guides at all-guides.com KX-T7730CA Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks PSVTUMG2NTR TRANSISTOR(SI) F2G1C2200012 UN5213 TRANSISTOR(SI) PQCUV1A225ZF UN5213 TRANSISTOR(SI) ECUV1H102KBV 0.001 Q101 PQVTDTA143EU TRANSISTOR(SI) ECUV1H821KBV 820p Q102...
  • Page 34 All manuals and user guides at all-guides.com KX-T7730CA Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks C209 ECUV1H222KBV 0.0022 ERJ3GEYJ683 C211 ECUV1H103KBV 0.01 ERJ3GEYJ393 C212 ECUV1H102KBV 0.001 ERJ3GEYJ473 C213 ECUV1H102KBV 0.001 ERJ3GEYJ393...

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