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.
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.
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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.
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 •...
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)
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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) →...
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).
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) •...
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...
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.
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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).
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.
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)
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...
KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT 8 Service Mode 8.1. Engineering Mode 8.1.1. Base Unit...
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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)
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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...
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)
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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)
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)
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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)
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KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT Cross Reference: Check Point (Base Unit) (P.36)
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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)
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KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT Cross Reference: Check Point (Handset) (P.40)
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)
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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)
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.
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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.
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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,...
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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.
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.
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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...
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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...
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.
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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.
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.
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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: •...
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.
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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”...
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)
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)
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.
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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”...
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)
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).
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...
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.
(*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.
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.
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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...
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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...
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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...
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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,...