Panasonic KX-TG7120FXT Service Manual
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Panasonic KX-TG7120FXT Service Manual

Panasonic KX-TG7120FXT Service Manual

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Telephone Equipment
KX-TG7120FXS
KX-TG7120FXT
KX-TGA711FXS
KX-TGA711FXT
Digital Cordless Answering System
Silver Version
Titanium Black Version
(for Central Europe)
© 2006 Panasonic Communications Co., Ltd. All
rights reserved. Unauthorized copying and distribu-
tion is a violation of law.
ORDER NO. KM40606102CE

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Summary of Contents for Panasonic KX-TG7120FXT

  • Page 1 ORDER NO. KM40606102CE Telephone Equipment KX-TG7120FXS KX-TG7120FXT KX-TGA711FXS KX-TGA711FXT Digital Cordless Answering System Silver Version Titanium Black Version (for Central Europe) © 2006 Panasonic Communications Co., Ltd. All rights reserved. Unauthorized copying and distribu- tion is a violation of law.
  • Page 2 KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT...

  • Page 3: Table Of Contents

    KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT TABLE OF CONTENTS PAGE PAGE 1 Safety Precaution ------------------------------------------------ 4 14 Appendix Information of Schematic Diagram --------- 76 1.1. For Service Technicians --------------------------------- 4 14.1. CPU Data (Base Unit) ---------------------------------- 76 2 Warning -------------------------------------------------------------- 4 14.2. CPU Data (Handset) ------------------------------------ 78 2.1.

  • Page 4: Safety Precaution

    KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 1 Safety Precaution 1.1. For Service Technicians ICs and LSIs are vulnerable to static electricity. When repairing, the following precautions will help prevent recurring malfunctions. 1. Cover the plastic parts boxes with aluminum foil and ground them. 2. Ground the soldering irons. 3.
  • Page 5 KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 2.2.1. Suggested PbF Solder There are several types of PbF solder available commercially. While this product is manufactured using Tin, Silver, and Copper (Sn+Ag+Cu), you can also use Tin and Copper (Sn+Cu) or Tin, Zinc, and Bismuth (Sn+Zn+Bi). Please check the manufacturer’s specific instructions for the melting points of their products and any precautions for using their product with other materials.

  • Page 6: Specifications

    KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 3 Specifications Note: • Specifications are subject to change. Connections: • The unit will not work during a power failure. We recommend you connect a standard telephone on the same line for power pro- tection. Note for Service: • Operation range: Up to 300 m outdoors, Up to 50 m indoors •...

  • Page 7: Technical Descriptions

    KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 4 Technical Descriptions 4.1. Block Diagram (Base Unit)

  • Page 8: Circuit Operation (Base Unit)

    KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 4.2. Circuit Operation (Base Unit) 4.2.1. Outline Base Unit consists of the following ICs as shown in Block Diagram (Base Unit) (P.7). • DECT BBIC (Base Band IC): IC7 - Handling all the audio, signal and data processing needed in a DECT base unit - Controlling the DECT specific physical layer and radio section (Burst Module Controller section) - ADPCM code filter for speech encoding and speech decoding (DSP section) - Echo-cancellation and Echo-suppression (DSP section)
  • Page 9 KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 4.2.2. Power Supply Circuit The power is supplied to the DECT BBIC, RF Module, EEPROM and Charge Contact from AC Adaptor (+6.5 V) as shown in Fig.101. The power supply is as follows; • DECT BBIC (IC7): CN2 (+6.5 V) → IC1 → Q9 → IC7 CN2 (+6.5 V) →...

  • Page 10: Pulse Dialing

    KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 4.2.4. Transmitter/Receiver • Audio Circuits and DTMF tone signal circuits. Base Unit and Handset mainly consist of RF Module and DECT BBIC. Base Unit and Handset transmit/receive voice signal and data signal through the antenna on carrier frequency. Signal Path: *Refer to Signal Route (P.14).

  • Page 11: Block Diagram (Handset)

    KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 4.3. Block Diagram (Handset) SPEAKER RXDA Speech Burst Decoding Decoding TXDA RECEIVER Speech Burst Module Encoding Encoding RSSI ADPCM SYDA Codec SYEN Analog Interface Filter SYCL Front CHARGE(+) CHARGE XTAL CHARGE CHARGE CIRCUIT CONTACTS CHARGE DETECT Q4,Q5,Q9 10.368 CHARGE(-) EEPROM BATTERY ON SWITCH...

  • Page 12: Circuit Operation (Handset)

    KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 4.4. Circuit Operation (Handset) 4.4.1. Outline Handset consists of the following ICs as shown in Block Diagram (Handset) (P.11). • DECT BBIC (Base Band IC): IC1 - All data signals (forming/analyzing ACK or CMD signal) - All interfaces (ex: Key, Detector Circuit, Charge, DC/DC Converter, EEPROM, LCD) •...

  • Page 13: Circuit Operation (Charger Unit)

    KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 4.5. Circuit Operation (Charger Unit) 4.5.1. Power Supply Circuit The power supply is as shown.

  • Page 14: Signal Route

    KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 4.6. Signal Route...
  • Page 15 KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT...

  • Page 16: Location Of Controls And Components

    KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 5 Location of Controls and 6 Installation Instructions Components 6.1. Connections Base unit 5.1. Controls When connecting the AC adaptor to the base unit, a short beep will be heard. If it is not heard, check the connections. 5.1.1. Base Unit Charger Connect the AC adaptor to the charger and route the cable...

  • Page 17: Battery

    When charging, the battery icon is shown as follows. • Use only the included rechargeable batteries HHR-55AAAB or HHR-4EPT. • When replacing batteries, we recommend using the Panasonic rechargeable batteries P03P. When the batteries are fully charged, remains on the display.
  • Page 18 KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 6.2.4. Panasonic Ni-MH Battery Performance (included batteries) Note: • It is normal for batteries not to reach full capacity at the initial charge. Maximum battery performance is reached after a few complete cycles of charge/discharge (use). • Actual battery performance depends on a combination of how often the handset is in use and how often it is not in use (standby).

  • Page 19: Operation Instructions

    KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 7 Operation Instructions 7.1. Base Unit Settings • Use the handset to customise the base unit. • When customising the base unit, the current item or setting is indicated by . *1 Change the recall time, if necessary, depending on the requirements of your service provider/telephone company or PBX. *2 The default setting will be as follows if you select the following regional codes when changing the unitís region setting: CZ=100 msec.

  • Page 20: Handset Settings

    KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 7.2. Handset Settings Cross Reference: Registering a Handset to the Base Unit (P.21) Base Unit Settings (P.19)

  • Page 21: Registering A Handset To The Base Unit

    KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 7.3. Registering a Handset to the Base Unit Cross Reference: For Service Hint (P.22) 7.3.1. Cancelling a handset...

  • Page 22: For Service Hint

    KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 7.4. For Service Hint...

  • Page 23: Service Mode

    KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 8 Service Mode 8.1. Engineering Mode 8.1.1. Base Unit...
  • Page 24 KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT Frequently Used Items (Base Unit) ex.) Items (*3) Address Default Data New Data Remarks C-ID (FSK) sensitivity 04 72 01 (6dB up) 02 (12dB up) When hex changes from “00” to “01” or “02”, gain increases by 6dB or 12dB. C-ID (DTMF) sensitivity 04 80 60 (6dB up)
  • Page 25 KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 8.1.2. Handset...
  • Page 26 KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT Frequently Used Items (Handset) ex.) Items (*2) Address Default Data New Data Possible Adjusted Possible Adjusted Remarks Value MAX (hex) Value MIN (hex) Sending level 00 06 Adjusted value Given value (*3) Receiving level 00 07 Adjusted value Given value (*4) Battery Low 00 04...

  • Page 27: Troubleshooting Guide

    KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 9 Troubleshooting Guide 9.1. Troubleshooting Flowchart Flow Chart Cross Reference: Check Power (P.28) Bell Reception (P.35) Check Battery Charge (P.29) Check Link (P.30) Check Handset Transmission (P.34) Check Handset Reception (P.34) Signal Route (P.14) Check Caller ID (P.34) Check TAM Operation (P.35)
  • Page 28 KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 9.1.1. Check Power 9.1.1.1. Base Unit Is the AC Adaptor inserted into AC outlet? (*1) Cross Reference: Note: Power Supply Circuit (P.9) (*1) Refer to Specifications (P.6) for part number and supply voltage of AC Adaptor. 9.1.1.2. Handset Cross Reference: Power Supply Circuit/Reset Circuit (P.12)

  • Page 29: Charger Unit

    KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 9.1.2. Check Battery Charge 9.1.2.1. Base Unit Cross Reference: Charge Circuit (P.12) 9.1.2.2. Handset Cross Reference: Check Power (P.28) Charge Circuit (P.12) 9.1.2.3. Charger Unit Cross Reference: Charge Circuit (P.12)
  • Page 30 KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 9.1.3. Check Link 9.1.3.1. Base Unit Note: (*1) Refer to Troubleshooting by Symptom (Base Unit and Charger Unit) (P.36) Cross Reference: Check Point (Base Unit) (P.36) Power Supply Circuit (P.9)
  • Page 31 KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT Cross Reference: Check Point (Base Unit) (P.36)
  • Page 32 KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 9.1.3.2. Handset Note: (*1) Refer to Troubleshooting by Symptom (Handset) (P.40) Cross Reference: Check Point (Handset) (P.40) Power Supply Circuit/Reset Circuit (P.12)
  • Page 33 KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT Cross Reference: Check Point (Handset) (P.40)

  • Page 34: Check Handset Transmission

    KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 9.1.4. Check Handset Transmission Cross Reference: Signal Route (P.14) 9.1.5. Check Handset Reception Cross Reference: How to Check the Handset Speaker or Receiver (P.60). Signal Route (P.14) 9.1.6. Check Caller ID Cross Reference: Signal Route (P.14)
  • Page 35 KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 9.1.7. Bell Reception 9.1.7.1. Base Unit 9.1.7.2. Handset Cross Reference: Telephone Line Interface (P.9) Check Link (P.30) How to Check the Handset Speaker or Receiver (P.60) 9.1.8. Check TAM Operation Cross Reference: Power Supply Circuit (P.9) Note: (*1) When replacing FLASH MEMORY (IC9), TAM data need to be written to it. Refer to Base Unit of Things to Do after Replacing IC (P.58)

  • Page 36: Troubleshooting By Symptom (Base Unit And Charger Unit)

    KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 9.2. Troubleshooting by Symptom (Base Unit and Charger Unit) If your unit has below symptoms, follow the instructions in remedy column. Remedies depend on whether you have DECT tester (*1) or not. Note: (*1) A general repair is possible even if you don’t have the DECT tester because it is for confirming the levels, such as Acoustic level in detail.
  • Page 37 KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT Items Check Procedure Check or Point Replace Parts (G)* Hookswitch Check with 1. Connect CN1 (Telephone Socket) to Tel-simulator which is connected with L1, L2, Q3, R14, 600 Ω. DC Characteristics R15, Q4, R16, 2. Set line voltage to 48 V and line current to 40mA at off-hook condition of nor- R17, IC7, D3 mal telephone.
  • Page 38 KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT Items Check Procedure Check or Point Replace Parts Sensitivity Receiver Follow steps 1 to 6 of (I). IC7, IC10, L7, Confirmation 7.Set DECT tester power to -90 dBm. L3, L4, L6, 8.Confirm that the BER is < 1000 ppm. C117, C118, C119, C120, C124, C125,...
  • Page 39 KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 9.2.2. Check Point (Charger Unit) Items Check Procedure Check or Point Replace Parts 1. Connect Charge Contact 12 Ω/2 W resistor between charge+ and charge-. Charging Check R2, R1 2. Measure and confirm voltage across the resistor is 3.3 V ± 0.2 V. R3, R4 Note: After the measuring, suck up the solder of TP.

  • Page 40: Troubleshooting By Symptom (Handset)

    KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 9.3. Troubleshooting by Symptom (Handset) If your unit has below symptoms, follow the instructions in remedy column. Remedies depend on whether you have DECT tester (*1) or not. Note: (*1) A general repair is possible even if you don’t have the DECT tester because it is for confirming the levels, such as Acoustic level in detail.
  • Page 41 KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT Items Check Procedure Check or Point Replace Parts (G)* Charge Detection (OFF) 1. Stop supplying 3.5 V to J3 CHARGE(+) and J4 CHARGE(-). IC1, Q4, Q5, Check 2. Execute the command “Backloff” then “charge”. Q9, D6, D7, 3. Confirm that the returned value is 00 (hex). D8, L4, L5, R5, R6, R7, R8, F1...
  • Page 42 KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT Items Check Procedure Check or Point Replace Parts Sensitivity Receiver Follow steps 1 to 3 of (K). IC1, IC4, C66, Confirmation 4.Set DECT tester power to -88 dBm. C58, C57, 5.Confirm that the BER is < 1000 ppm. C50, C52, C53, R52, C60, Timing Confirmation...

  • Page 43: How To Replace The Flat Package Ic

    KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 9.4. 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. 9.4.1.
  • Page 44 KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 9.4.3. How to Install the IC 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. 3.

  • Page 45: How To Replace The Llp (Leadless Leadframe Package) Ic

    KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 9.5. How to Replace the LLP (Leadless Leadframe Package) IC 9.5.1. Preparation • PbF (: Pb free) Solder • Soldering Iron Tip Temperature of 700°F ± 20°F (370°C ± 10°C) Note: We recommend a 30 to 40 Watt soldering iron. An expert may be able to use a 60 to 80 Watt iron where someone with less experience could overheat and damage the PCB foil.
  • Page 46 KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 9.5.4. How to Install the IC 1. Place the solder a little on the land where the radiation GND pad on IC bottom is to be attached. 2. Place the solder a little on the land where IC pins are to be attached, then place the IC. Note: •...

  • Page 47: Disassembly And Assembly Instructions

    KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 10 Disassembly and Assembly Instructions 10.1. Disassembly Instructions 10.1.1. Base Unit...
  • Page 48 KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 10.1.2. Handset...
  • Page 49 KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 10.1.3. Charger Unit...

  • Page 50: How To Replace The Handset Lcd

    KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 10.2. How to Replace the Handset LCD...

  • Page 51: Measurements And Adjustments

    KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 11 Measurements and Adjustments 11.1. The Setting Method of JIG (Base Unit) 11.1.1. Preparation 11.1.1.1. Equipment Required • DECT tester: Rohde & Schwarz, CMD 60 is recommended. • Frequency counter: It must be precise enough to measure intervals of 1 Hz (precision; ±4 ppm). Hewlett Packard, 53131A is recommended.
  • Page 52 KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 11.1.2.2. Batch file Settings Note: • “****” varies depending on the country. 11.1.2.3. Commands See the table below for frequently used commands. Command name Function Example rdeeprom Read the data of EEPROM Type “rdeeprom 00 00 FF”, and the data from address “00 00”...

  • Page 53: Adjustment Standard (Base Unit)

    KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 11.2. Adjustment Standard (Base Unit) When connecting the simulator equipment for checking, please refer to below. 11.2.1. Flow Solder Side View BLACK VDD4 VDD3 Note: (A) - (S) is referred to Check Point (Base Unit) (P.36)

  • Page 54: Adjustment Standard (Charger Unit)

    KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 11.3. Adjustment Standard (Charger Unit) When connecting the simulator equipment for checking, please refer to below. 11.3.1. Flow Solder Side View Digital DC POWER Volt 6.5 V Meter /2 W BLACK for_ PQLV30045ZA PQUP11413Z Note: (A) is referred to Check Point (Charger Unit) (P.39)

  • Page 55: The Setting Method Of Jig (Handset)

    KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 11.4. The Setting Method of JIG (Handset) 11.4.1. Preparation 11.4.1.1. Equipment Required • DECT tester: Rohde & Schwarz, CMD 60 is recommended. • Frequency counter: It must be precise enough to measure intervals of 1 Hz (precision; ±4 ppm). Hewlett Packard, 53131A is recommended.
  • Page 56 KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 11.4.2.2. Batch file Settings Note: • “*****” varies depending on the country. 11.4.2.3. Commands See the table below for frequently used commands. Command name Function Example rdeeprom Read the data of EEPROM Type “rdeeprom 00 00 FF”, and the data from address “00 00”...

  • Page 57: Adjustment Standard (Handset)

    KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 11.5. Adjustment Standard (Handset) When connecting the simulator equipment for checking, please refer to below. 11.5.1. Component View CLK_G REV+ REV- C101 POWER VDD3 VDD1 VDD2 JTAG C23 R16 TP22 TP23 TP20 TP21 CHARGE+ CHARGE- Note: (A) - (T) is referred to Check Point (Handset) (P.40)

  • Page 58: Things To Do After Replacing Ic

    KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 11.6. Things to Do after Replacing IC Cautions: Some of the content on this page may not apply to models from some countries. The contents below are the minimum adjust- ments required for operation. 11.6.1. Base Unit Before making the following adjustment, ensure you have carried out PC Setting (P.51) in The Setting Method of JIG (Base Unit).

  • Page 59: Rf Specification

    KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 11.7. RF Specification 11.7.1. Base Unit Item Value Refer to -. * TX Power 20 dBm ~ 25 dBm Check Point (Base Unit) (I) Modulation -350 ~ -400/+320 ~ +370 kHz/div Check Point (Base Unit) (J) Frequency Offset -45 kHz ~ +45 kHz Check Point (Base Unit) (K) Frequency Drift <...

  • Page 60: How To Check The Handset Speaker Of Receiver

    KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 11.8. How to Check the Handset Speaker or Receiver 1. Prepare the digital voltmeter, and set the selector knob to ohm meter. 2. Put the probes at the speaker terminals as shown below. 11.9. Frequency Table (MHz) BASE UNIT HANDSET Channel No Transmit Frequency...

  • Page 61: Schematic Diagram

    KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 12 Schematic Diagram 12.1. For Schematic Diagram 12.1.1. Base Unit (Schematic Diagram (Base Unit_Main)) Notes: 1. DC voltage measurements are taken with voltmeter from the negative voltage line. 2. The schematic diagrams may be modified at any time with the development of new technology. 12.1.2.

  • Page 62: Schematic Diagram (Base Unit_Main)

    KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 12.2. Schematic Diagram (Base Unit_Main) L2T L1T L1R LINE_DC (2125) Loop Current 100k (2125) 5.6k 3.9k 100k 4.7k 180k K1000p (2125) TP_RLY1 L1T/TP_RLY2 1500p L2T/TP_RLY3 for JT 100k L1R/TP_RLY4 180k TP_RLY5 K1000p 1500p +2.5V Caller ID, for NL +2.5V Bell Signal TX_AF J101...
  • Page 63 KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT ANT_2 ANT_1 2.2n 2.2n R108 R107 C122 3.3V +3.3V GND1 GND14 ANT2 GND13 VCCPA GND12 +2.5V GND2 GND11 TX DATA IC10 10.368MHz GND3 GND10 VCC_OC ANT1 RF Module 2.5V R112 RESET GND4 *RESET RSSI RSSI GND9 (1005) SYRI TXDA GND5 GND8 R111...

  • Page 64: Schematic Diagram (Base Unit_Operation)

    KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 12.3. Schematic Diagram (Base Unit_Operation) LED2T CN11-5 CN11-4 CN11-3 CN11-2 CN11-1 CN10-5 CN10-4 SKIP REPEAT ERASE CN10-3 CN10-2 ANS_ON VOL_UP LOCATOR CN10-1 VOL_DOWN PLAY STOP KX-TG7120 SCHEMATIC DIAGRAM (Base Unit_Operation)
  • Page 65 KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT Memo...

  • Page 66: Schematic Diagram (Handset)

    KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 12.4. Schematic Diagram (Handset) 3.3V Charge Current VDD3 BATTERY +3.3V 5.6n 2.5V 1.8V VDD1 +2.5V VDD2 +1.8V 5.6k 115kHz (Talk Mode) 5.6k TP20 (When on charge) TP21 100n +2.5V POWER C31 NC 3.3k 100n +2.5V +1.8V ROW1 LDO2_CTRL *INT1/P11 LDO2_CTRL LDO1_CTRL 100n...
  • Page 67 KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT ANT1 BATTERY GND1 GND14 10.368MHz +2.5V ANT2 GND13 2.5V VCCPA GND12 RESET GND2 GND11 GND3 GND10 VCC_OC ANT1 RF Module TX DATA GND4 *RESET RSSI RSSI GND9 SYRI TXDA GND5 GND8 R51 NC RFCLK RX DATA +5V DC supply to Mic 2.2k TP22 TX-AF...

  • Page 68: Schematic Diagram (Charger Unit)

    KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 12.5. Schematic Diagram (Charger Unit) SCHEMATIC DIAGRAM (Charger Unit)

  • Page 69: Printed Circuit Board

    KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 13 Printed Circuit Board 13.1. Circuit Board (Base Unit_Main) 13.1.1. Component View...
  • Page 70 KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 13.1.2. Flow Solder Side View...

  • Page 71: Circuit Board (Base Unit_Operation)

    KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 13.2. Circuit Board (Base Unit_Operation) 13.2.1. Component View PQUP11408Z KX-TG7120 CN11 LED2T CN10 KX-TG7120 CIRCUIT BOARD (Base Unit_Operation (Component View))
  • Page 72 KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 13.2.2. Flow Solder Side View CN11 CN10 KX-TG7120 CIRCUIT BOARD (Base Unit_Operation (Flow Solder Side View))

  • Page 73: Circuit Board (Handset)

    KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 13.3. Circuit Board (Handset) 13.3.1. Component View CLK CLK_G C101 POWER VDD3 VDD1 VDD2 JTAG C23 R16 BATT+ BATT- TP22 TP23 TP20 TP21 CHARGE+ CHARGE-...
  • Page 74 KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 13.3.2. Flow Solder Side View LED10 LED3 LED2 LED1...

  • Page 75: Circuit Board (Charger Unit)

    KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 13.4. Circuit Board (Charger Unit) 13.4.1. Component View PQUP11413Z for_ PQLV30045ZA BLACK CIRCUIT BOARD (Charger Unit (Component View)) 13.4.2. Flow Solder Side View BLACK for_ PQLV30045ZA PQUP11413Z CIRCUIT BOARD (Charger Unit (Flow Solder Side View))

  • Page 76: Appendix Information Of Schematic Diagram

    KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 14 Appendix Information of Schematic Diagram 14.1. CPU Data (Base Unit) 14.1.1. IC7 (BBIC) Pin No. Description Connection at Normal mode at Reset mode *INT1n/ P11 I-PU VDDIO1 VDDIO VDD1 VSS1 SDA1/P25 D,I/O SCL1/P24 *INT5/VDDE/P15 P1[5] *INT2/P12 SP_AMP I-PU Xtal1 Xtall VSSRF...
  • Page 77 KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT Pin No. Description Connection at Normal mode at Reset mode CIDINp CIDINp P14 / *INT4 HOOK PULSE_CTRL Q2_ON Q2_OFF ADC2 ADC2 ADC0 ADC0...

  • Page 78: Cpu Data (Handset)

    KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 14.2. CPU Data (Handset) 14.2.1. IC1 (BBIC) Pin No Description Connection at Normal at Reset mode INT1n/P1[1] ROW1 I-PU VDDIO VDDIO LED1/PWM0/P2[0] I-PU LED2/PWM1/P2[1] LCD_CSB I-PU LED3 LCD_BACKLIGHT LED_BIAS/P3[6]/PD6 LED_BIAS I-PD SDA1/P2[5] D,IO LCD_SI SCL1/P2[4] LCD_SCL INT5n/VDDE/P1[5] LCD_RS INT2n/P1[2] ROW2 I-PU Xtal1...
  • Page 79 KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT Pin No Description Connection at Normal at Reset mode LDO1_Sence LDO1_Sence AVS2 AVS2 AVD2 AVD2 LSRn/REF LSRn LSRp/REF LSRp MICn VREFm VREFm VBUF VBUF AGND AGND MICp MICp VREFp VREFp P3[0] COL0 I-PD P1[4]/INT4n KEY_LED P1[3]/INT3n ROW3 P2[2]/CLK100 LCD_RESET I-PD AVS_Sence AVS_Sence...

  • Page 80: Terminal Guide Of The Ics, Transistors And Diodes

    KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 14.3. Terminal Guide of the ICs, Transistors and Diodes 14.3.1. Base Unit 14.3.2. Handset...

  • Page 81: Exploded View And Replacement Parts List

    KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 15 Exploded View and Replacement Parts List 15.1. Cabinet and Electric Parts (Base Unit)

  • Page 82: Cabinet And Electric Parts (Handset)

    (*1) This cable is fixed by welding. Refer to How to Replace the Handset LCD (P.50). (*2) The rechargeable Ni-MH battery P03P (HHR-4EPT, Capacity: up to 750 mAh) is available through sales route of Panasonic. (*3) Attach the spacer (No. 121) to the exact location described above.

  • Page 83: Cabinet And Electric Parts (Charger Unit)

    KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 15.3. Cabinet and Electric Parts (Charger Unit)

  • Page 84: Accessories And Packing Materials

    KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 15.4. Accessories and Packing Materials 15.4.1. KX-TG7120FXS/FXT...
  • Page 85 KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 15.4.2. KX-TGA711FXS/FXT...

  • Page 86: Replacement Part List

    When replacing any PQGT18914Z NAME PLATE (for KX-TG7120FXS) of these components, only use specified manufacture’s PQGT18914X NAME PLATE (for KX-TG7120FXT) PQHA10023Z RUBBER PARTS, FOOT CUSHION parts. 15.5.1.2. Main P.C.Board Parts 3. The S mark means the part is one of some identical parts.
  • Page 87 KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks ERJ2GEJ103 R101 ERJ3GEYJ100 ERJ3GEYJ184 180K R102 ERJ3GEYJ222 2.2K ERJ3GEYJ105 R103 PQ4R10XJ471 ERJ3GEYJ184 180K R106 ERJ3GEYJ271 ERJ3GEYJ105 R109 ERJ3GEYJ181 ERJ3GEYJ104 100K R111 ERJ2GEJ101 ERJ3GEYJ104 100K R112 ERJ2GEJ102...
  • Page 88 KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks ECUE1H100DCQ PQJC10056X BATTERY TERMINAL ECUE1H102KBQ 0.001 PQKF10713Z1 CABINET COVER (for ABS-HB TGA711FXS) C102 PQCUV1A105KB PQKF10713Z2 CABINET COVER (for ABS-HB C110 ECUE1H102KBQ 0.001 TGA711FXT) C112 ECJ0EC1H220J PQQT23182Z...
  • Page 89 KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks ERJ2GEJ153 F1J0J4750005 ERJ2GEJ332 3.3K F1J0J4750005 ERJ2GEJ102 ECJ0EC1H1R5C 1.5P ERJ3GEYJ565 5.6M ECJ0EC1H100D ERJ2GEJ330 ECJ0EC1H100D ERJ3GEYJ330 ECJ0EC1H100D ERJ2GEJ471 ECJ0EC1H100D ERJ2GEJ332 3.3K ECJ0EC1H100D ERJ2GEJ222 2.2K ECJ0EC1H100D ERJ3GEYJ103 ECJ0EC1H100D ERJ3GEYJ103...
  • Page 90 KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 15.5.4.1. KX-TG7120FXS/FXT Ref. Part No. Part Name & Description Remarks PQLV207CEZ AC ADAPTOR PQJA10075Z CORD, TELEPHONE PQQX15319Z INSTRUCTION BOOK (for English) (*1) PQQX15423Z INSTRUCTION BOOK (for Czech) (*1) PQQX15424Z INSTRUCTION BOOK (for Slovak) (*1) PQQW15234Z LEAFLET, QUICK GUIDE (for English) PQQW15235Z LEAFLET,...

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