Panasonic KX-TG1283BXS Service Manual
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Panasonic KX-TG1283BXS Service Manual

Digital cordless answering system
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Telephone Equipment
KX-TG1283BXS
KX-TG1283BXT
KX-TCA122CXS
KX-TCA122CXT
KX-TCA121CXS
KX-TCA121CXT
Digital Cordless Answering System
Silver Version
Titanium Black Version
(for Middle Near East and Africa)
© 2007 Panasonic Communications Co., Ltd. All
rights
reserved.
distribution is a violation of law.
ORDER NO. KM40701268CE
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Summary of Contents for Panasonic KX-TG1283BXS

  • Page 1 Telephone Equipment KX-TG1283BXS KX-TG1283BXT KX-TCA122CXS KX-TCA122CXT KX-TCA121CXS KX-TCA121CXT Digital Cordless Answering System Silver Version Titanium Black Version (for Middle Near East and Africa) © 2007 Panasonic Communications Co., Ltd. All rights reserved. Unauthorized copying distribution is a violation of law.

  • Page 2: Table Of Contents

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT Note: Because section 4 of this manual is an extract from the operating instructions for this model, it is subject to change without notice. You can download and refer to the original operating instructions on TSN Server for further information.
  • Page 3 KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 22.4. How to Clear User Setting 29.6. Fixtures and Tools 23 HOW TO REPLACE THE FLAT PACKAGE IC 30 FOR SCHEMATIC DIAGRAM 23.1. Preparation 30.1. Base Unit (SCHEMATIC DIAGRAM (BASE UNIT_MAIN)) 23.2.

  • Page 4: About Lead Free Solder (Pbf: Pb Free)

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 1 ABOUT LEAD FREE SOLDER (PbF: Pb free) Note: In the information below, Pb, the symbol for lead in the periodic table of elements, will refer to standard solder or solder that contains lead.

  • Page 5: For Service Technicians

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 2 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.

  • Page 6: Operating Instructions

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 4 OPERATING INSTRUCTIONS 4.1. To Use the Unit in the Event of a Power Failure The included battery box functions as an emergency power source for Panasonic cordless phones in the event of a power failure. 4.2. Battery 4.2.1.
  • Page 7 KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 4.2.2. Battery Installation for handset 4.2.3. Battery Charge Place the handset on the base unit or charger for about 7 hours before initial use. When charging, the battery icon is shown as follows. When the batteries are fully charged, remains on the display.
  • Page 8 7 hours, the batteries must be replaced. Important: • • • • We recommend the use of Panasonic rechargeable Ni-MH batteries HHR-4EPT. If you install non-rechargeable batteries and start charging, the batteries may leak electrolyte.

  • Page 9: Location Of Controls

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 4.3. Location of Controls 4.3.1. Base Unit 4.3.2. Handset Note: • • • • Up to 3 menu items can be displayed at a time. To select a menu item not shown on the current page, scroll up or down by pressing the navigator key, , respectively.

  • Page 10: Connections

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 4.4. Connections 4.4.1. Base Unit When the AC adaptor is connected, a short beep will be heard. If it is not heard, check the connections. Important: • • • • Use only the AC adaptor PQLV19BXY and telephone line cord supplied with this unit.

  • Page 11: Guide To Settings

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 4.5. Guide to Settings For your reference, a chart of all items which can be customised for the base unit and the handset is printed below. • • • • These items are customised using the handset.
  • Page 12 KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 4.5.3. Handset Settings *1 The item will not be reset when pressing keys. Refer to How to Clear User Setting (P.69). *2 The item will not be reset when pressing keys.

  • Page 13: Registering A Handset To A Base Unit

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 4.6. Registering a Handset to a Base Unit 4.6.1. Cancelling a Handset...

  • Page 14: Copying Phonebook Entries

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 4.6.2. Cancelling a Base Unit 4.7. Copying Phonebook Entries 4.7.1. Copying Handset Phonebook Entries to Other Handset 4.7.2. Copying Handset Phonebook Entries to the Shared Phonebook 4.8. For Service Hint...

  • Page 15: Disassembly Instructions

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 5 DISASSEMBLY INSTRUCTIONS 5.1. Base Unit Shown in Fig.- To Remove Remove Cabinet Cover Screws (2.6 × 14)..(A) × 5 Main P.C.Board Tapes and Solders Main P.C.Board Cable Main P.C.Board Cabinet Body Screws (2.6 ×...

  • Page 16: Handset

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 5.2. Handset Shown in Fig.- To Remove Remove Cabinet Cover Screws (2 × 10)..(D) × 2 Follow the procedure. Main P.C.Board Screw (2 × 10)....(E ) × 1 Screws (2 × 10)..(F) × 2 Tapes and Solders Main P.C.Board...

  • Page 17: Charger Unit

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 5.3. Charger Unit Shown in Fig.- To Remove Remove Cabinet Cover Screws (2.6 × 10)..(G) × 2 Main P.C.Board Solders Main P.C.Board...

  • Page 18: How To Replace The Handset Lcd

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 6 HOW TO REPLACE THE HANDSET LCD...

  • Page 19: Troubleshooting Flowchart

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 7 TROUBLESHOOTING FLOWCHART Flow Chart Cross Reference: Check Power (P.20) Bell Reception (P.27) Check Battery Charge (P.21) Check Link (P.22) Check Handset Transmission (P.26) Check Handset Reception (P.26) SIGNAL ROUTE (P.54) Check Caller ID (P.26)

  • Page 20: Check Power

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 7.1. Check Power 7.1.1. Base Unit Is the AC Adaptor inserted into AC outlet? (Check AC Adaptor’s specification.) Cross Reference: Power Supply Circuit (P.49) 7.1.2. Handset Cross Reference: Power Supply Circuit/Reset Circuit (P.52)

  • Page 21: Check Battery Charge

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 7.2. Check Battery Charge 7.2.1. Base Unit Cross Reference: Charge Circuit (P.52) 7.2.2. Handset Cross Reference: Check Power (P.20) Charge Circuit (P.52) 7.2.3. Charger Unit Cross Reference: Charge Circuit (P.52)

  • Page 22: Check Link

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 7.3. Check Link 7.3.1. Base Unit Note: (*1) Refer to TROUBLESHOOTING BY SYMPTOM (BASE UNIT AND CHARGER UNIT) (P.28) Cross Reference: Check Point (Base Unit) (P.28) Power Supply Circuit (P.49)
  • Page 23 KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT Cross Reference: Check Point (Base Unit) (P.28)
  • Page 24 KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 7.3.2. Handset Note: (*1) Refer to TROUBLESHOOTING BY SYMPTOM (HANDSET) (P.37) Cross Reference: Check Point (Handset) (P.37) Power Supply Circuit/Reset Circuit (P.52)
  • Page 25 KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT Cross Reference: Check Point (Handset) (P.37)

  • Page 26: Check Handset Transmission

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 7.4. Check Handset Transmission Cross Reference: SIGNAL ROUTE (P.54) 7.5. Check Handset Reception Cross Reference: HOW TO CHECK THE SPEAKER OR RECEIVER (P.46). SIGNAL ROUTE (P.54) 7.6. Check Caller ID Cross Reference: SIGNAL ROUTE (P.54)

  • Page 27: Bell Reception

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 7.9. Bell Reception 7.9.1. Base Unit 7.9.2. Handset Cross Reference: Telephone Line Interface (P.50) Check Link (P.22) HOW TO CHECK THE SPEAKER OR RECEIVER (P.46) 7.10. Check TAM Operation Cross Reference: Power Supply Circuit (P.49)

  • Page 28: Troubleshooting By Symptom (Base Unit And Charger Unit)

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 8 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.
  • Page 29 KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT Items Check Procedure Check or Point Replace Parts (E)* EEP-ROM Confirmation 1. EEP-ROM Confirmation (Execute the command “ChkTCD240XXrevYY”). IC3, C53, R56, R57, C57, Q6, XX: country code Q7, R64, R65, YY: revision number 2.
  • Page 30 KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT Items Check Procedure Check or Point Replace Parts (K)* Frequency Offset Check Follow steps 1 to 6 of (I). IC2, IC4, R137, 7.Confirm that the frequency offset is < ± 45kHz.
  • Page 31 KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT Items Check Procedure Check or Point Replace Parts (N)* Timing Confirmation Follow steps 1 to 6 of (I). IC2, IC4, R137, 7.Confirm that the Timing accuracy is < ± 2.0ppm.
  • Page 32 KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT Items Check Procedure Check or Point Replace Parts Audio Check 1. Link with Handset. IC4, CN1,SA1, L6, L7, D3, Q4, 2. Input -45dBm/1kHz to MIC of Handset. Q5, R23, R25, Measure the Level at Line I/F and distortion level.

  • Page 33: The Setting Method Of Jig (Base Unit)

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 8.2. The Setting Method of JIG (Base Unit) 8.2.1. Preparation 8.2.1.1. 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).
  • Page 34 KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 8.2.2.2. Batch file Settings Note: • • • • “****” varies depending on the country. 8.2.2.3. Commands See the table below for frequently used commands. Command name Function Example...

  • Page 35: Adjustment Standard (Base Unit)

    8.3. Adjustment Standard (Base Unit) When connecting the simulator equipment for checking, please refer to below. 8.3.1. Flow Solder Side View LOOP AF VOLT (G) (Q) Simulator METER (I) (J) (K) (L) (M) (N) (O) (P) BELL DC POWER DECT Tester AF VOLT Simulator METER...

  • Page 36: Check Point (Charger Unit)

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 8.4. Check Point (Charger Unit) Items Check Procedure Check or Point Replace Parts Charging Check 1. Connect Charge Contact 12Ω/2W resistor between charge+ and charge-. D11, R11, R12 2. Measure and confirm voltage across the resistor is 2.85V ± 0.2V.

  • Page 37: Troubleshooting By Symptom (Handset)

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 9 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...
  • Page 38 KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT Items Check Procedure Check or Point Replace Parts (F) Charge Control Check & 1. Apply 6V between J3(+) and J4(-) with DC power supply and set current limit to...
  • Page 39 KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT Items Check Procedure Check or Point Replace Parts (L)* Modulation Check and Follow steps 1 to 3 of (K). IC1, R54, C62, Adjustment 4.Confirm that the B-Field Modulation is -350 ~ -400/+320 ~ +370kHz/div using C123, C60, data type Fig 31.

  • Page 40: Troubleshooting For Speakerphone (Handset)

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT Items Check Procedure Check or Point Replace Parts (T) SP phone Audio Check 1. Link to Base which is connected to Line Simulator. IC1, C37, C68, and Confirmation C91, R25, 2.

  • Page 41: The Setting Method Of Jig (Handset)

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 9.3. The Setting Method of JIG (Handset) 9.3.1. Preparation 9.3.1.1. Equipment Required • • • • DECT tester: Rohde & Schwarz, CMD 60 is recommended. • • • • Frequency counter: It must be precise enough to measure intervals of 1 Hz (precision; ±4ppm).
  • Page 42 KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 9.3.2.2. Batch file Settings Note: • • • • “****” varies depending on the country. 9.3.2.3. Commands See the table below for frequently used commands. Command name Function Example...

  • Page 43: Adjustment Standard (Handset)

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT A201 C44 C62 C123 REV_TEST2 REV_TEST1 C117 C116 C118 C111 C101 C102 C108 C112 C104 C119 C107 TP22 TP23...

  • Page 44: Things To Do After Replacing Ic

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 10 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 adjustments required for operation.

  • Page 45: Rf Specification

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 11 RF SPECIFICATION 11.1. Base Unit Item Value Refer to -. * Remarks TX Power 20 dBm ~ 25 dBm Check Point (Base Unit) (I) Modulation -350 ~ -400/+320 ~ +370 kHz/div...

  • Page 46: How To Check The Speaker Or Receiver

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 12 HOW TO CHECK THE SPEAKER OR RECEIVER 1. Prepare the digital voltmeter, and set the selector knob to ohm meter. 2. Put the probes at the speaker (receiver) terminals as shown below.
  • Page 47 KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT...

  • Page 48: Block Diagram (Base Unit)

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 15 CIRCUIT OPERATION (BASE UNIT) 15.1. Outline Base Unit consists of the following ICs as shown in BLOCK DIAGRAM (BASE UNIT) (P.47). • • • • DECT BBIC (Base Band IC): IC4 −...

  • Page 49: Power Supply Circuit

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 15.2. Power Supply Circuit The power is supplied to the DECT BBIC, RF Module, EEPROM and Charge Contact from AC Adaptor (+6V) as shown in Fig.101. The power supply is as follows;...

  • Page 50: Telephone Line Interface

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 15.3. Telephone Line Interface <Function> • • • • Bell signal detection • • • • Clip signal detection • • • • ON/OFF hook circuit • • • • Audio circuits •...

  • Page 51: Block Diagram (Handset)

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 16 BLOCK DIAGRAM (HANDSET) SPEAKER RXDA Speech Burst Encoding Encoding TXDA RECEIVER Speech Burst Module Decoding Decoding RSSI ADPCM SYDA Codec SYEN Analog Interface Filter SYCL Front CHARGE(+) CHARGE...

  • Page 52: Circuit Operation (Handset)

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 17 CIRCUIT OPERATION (HANDSET) 17.1. Outline Handset consists of the following ICs as shown in BLOCK DIAGRAM (HANDSET) (P.51). • • • • DECT BBIC (Base Band IC): IC1 −...

  • Page 53: Circuit Operation (Charger Unit)

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 18 CIRCUIT OPERATION (CHARGER UNIT) 18.1. Power Supply Circuit The power supply is as shown.

  • Page 54: Signal Route

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 19 SIGNAL ROUTE...
  • Page 55 KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT...

  • Page 56: Cpu Data (Base Unit)

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 20 CPU DATA (BASE UNIT) 20.1. IC4 (BBIC) Pin No Description Connection at Normal mode at Reset mode VDDIO VDDID AD10 AD10 AD11 AD11 AD12 AD12 AD13 AD13 AD14...
  • Page 57 KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT Pin No Description Connection at Normal mode at Reset mode KEY_IN1 key_input with internal pull up KEY_IN0 key_input with internal pull up Hi-Z D.I/O DAB0 D.I/O DAB0 DAB8 D.I/O...
  • Page 58 KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT Pin No Description Connection at Normal mode at Reset mode...

  • Page 59: Cpu Data (Handset)

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 21 CPU DATA (HANDSET) 21.1. IC1 (BBIC) Pin No Description Connection at Normal mode at Reset mode INTln/P1[1] ROW1 I-PU VDDIO LED1/PWM0/P2[0] PWM0 I-PU LED2/PWM1/P2[1] LCD_CSB I-PU LED3 LED_BKL...
  • Page 60 KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT Pin No Description Connection at Normal mode at Reset mode LDO1_Sense LDO1_Sense AVS2 AVD2 LSRn/REF LSRp/REF LSRp MICn RINGING VREFm VBUF VBUF AGND AGND MICp MICp VREFp CIDINp P3[0]...

  • Page 61: Engineering Mode

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 22 ENGINEERING MODE 22.1. Base Unit...
  • Page 62 KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT Note: *: When you enter the address, please refer to the table below. Desired Number (hex) Input Keys Desired Number (hex) Input Keys [R] + 0 [R] + 1...
  • Page 63 KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT ex.) Items (*2) Address Default Data New Data Remarks C-ID (FSK) sensitivity 04 3D 01 (6dB up) 02 (12dB up) When hex changes from “00” to “01” or “02”, gain increases by 6dB or 12dB.

  • Page 64: Handset

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 22.2. Handset...
  • Page 65 KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT Note: *: When you enter the address, please refer to the table in Note: (P.62) of ENGINEERING MODE. ex.) Items (*4) Address Default Data New Data Possible Adjusted Possible Adjusted...
  • Page 66 KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT (*4) Items Description Sending level Analog Front End MIC Setting for Handset Mode Receiving level Analog Front End LSR Setting for Handset Mode Battery Low ADC value for battery low detection...

  • Page 67: Copying Phonebook Items When Repairing

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 22.3. Copying Phonebook Items when Repairing You can copy the handset phonebook to another (compatible Panasonic) handset. This will help to save the original phonebook data which the customer has registered. Refer to the following procedures.
  • Page 68 KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT Note: • • • • If the max number of handsets are already registered to the base unit, a new handset cannot be registered. • • • • To register the handset, refer to Registering a Handset to a Base Unit (P.13).

  • Page 69: How To Clear User Setting

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 22.4. How to Clear User Setting Units are reset to the Factory settings by this operation (Erase recorded Voice messages, stored Phone numbers, Caller list and etc.) Note: • • • • Some menus are not reset. Refer to Guide to Settings (P.11).

  • Page 70: How To Replace The Flat Package Ic

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 23 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.

  • Page 71: How To Install The Ic

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 23.3. 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.

  • Page 72: Cabinet And Electrical Parts (Base Unit)

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 24 CABINET AND ELECTRICAL PARTS (BASE UNIT)

  • Page 73: Cabinet And Electrical Parts (Handset)

    25 CABINET AND ELECTRICAL PARTS (HANDSET) Note: (*1) The rechargeable Ni-MH battery HHR-4EPT (Capacity: up to 750 mAh) is available through sales route of Panasonic. (*2) This cable is fixed by welding. Refer to HOW TO REPLACE THE HANDSET LCD (P.18).

  • Page 74: Cabinet And Electrical Parts (Charger Unit)

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 26 CABINET AND ELECTRICAL PARTS (CHARGER UNIT)

  • Page 75: Accessories And Packing Materials

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 27 ACCESSORIES AND PACKING MATERIALS 27.1. KX-TG1283BXS/BXT Note: (*1) These pads are pieces of Ref No. P3 (GIFT BOX).

  • Page 76: Kx-Tca121Cxs/Cxt

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 27.2. KX-TCA121CXS/CXT...

  • Page 77: Terminal Guide Of The Ics, Transistors And Diodes

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 28 TERMINAL GUIDE OF THE ICs, TRANSISTORS AND DIODES 28.1. Base Unit 28.2. Handset...

  • Page 78: Charger Unit

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 28.3. Charger Unit...

  • Page 79: Replacement Parts List

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 29 REPLACEMENT PARTS LIST 1. RTL (Retention Time Limited) Ref. Part No. Part Name & Description Remarks Note: PQBC10430Z1 BUTTON, PLAY ABS-HB The marking (RTL) indicates that the Retention Time is...
  • Page 80 KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks B0EDER000009 DIODE(SI) ERJ3GEYJ473 MA1Z300 DIODE(SI) ERJ3GEYJ560 MA8220 DIODE(SI) ERJ3GEYJ820 MA112 DIODE(SI) ERJ3GEYJ821 B0JCDD000002...
  • Page 81 KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks R306 ERJ3GEYJ471 ECUV1C104KBV R307 ERJ3GEYJ471 ECUV1C104KBV R311 ERJ3GEYJ154 150K ECUV1C104KBV R312 ERJ3GEYJ101 ECUV1C104KBV...

  • Page 82: Handset

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT Ref. Part No. Part Name & Description Remarks 29.2.2. Main P.C.Board Parts Q902 PQVTDTC143E TRANSISTOR(SI) Note: Q903 PQVTDTC143E TRANSISTOR(SI) (*1) When replacing IC1 or IC3, data needs to be written to...

  • Page 83: Charger Unit

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks ERJ3EKF8203 820K ECUE1H100DCQ ERJ3EKF4303 430K F1G1A1040003 ERJ3GEYJ221 PQCUV1H100DC ERJ2GEJ102 PQCUV1H100DC ERJ3GEYJ104 100K ECUE1H102KBQ 0.001...

  • Page 84: Accessories And Packing Materials

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 29.3.2. Main P.C.Board Parts 29.6. Fixtures and Tools Ref. Part No. Part Name & Description Remarks Note: (*1) See The Setting Method of JIG (Base Unit) (P.33), PCB200 PQWP130ETCHR MAIN P.C.BOARD ASS´Y (RTL)

  • Page 85: For Schematic Diagram

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 30 FOR SCHEMATIC DIAGRAM 30.1. Base Unit (SCHEMATIC DIAGRAM (BASE UNIT_MAIN)) Notes: 1. DC voltage measurements are taken with voltmeter from the negative voltage line. 2. This schematic diagrams may be modified at any time with the development of new technology.

  • Page 86: Schematic Diagram (Base Unit_Main)

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 31 SCHEMATIC DIAGRAM (BASE UNIT_MAIN) 33uH NC (2125) LINE_DC Loop Current 100K TEL_JACK NC (2125) 33uH 2.2K NC (2125) NC (2125) RLY1 R106 C101 180K K1000p K1500p C207 (1005)
  • Page 87 KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT Loop Current TCD340_240 ONLY TCD340_240 ONLY +3.0V AD17 +3.0V AD16 AD15 RDY/BUSY AD14 RDY/BUSY R156 AD13 DAB15 DAB15 ANS_LED DQ15 AD12 DAB7 RESET D10p AD11 DAB14 LED0 DAB7 DQ14...
  • Page 88 KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 32 SCHEMATIC DIAGRAM (BASE UNIT_OPERATION) SEG4 SEG3 SEG2 SEG1 COM2 COM1 SEG10 SEG9 SEG8 SEG7 SEG6 SEG5 TCD340_240 only R903 ANSWER LED903 Q903 ANS_LED 2APVCC LED902 INUSE GREEN R902 82...
  • Page 89 KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT Memo...

  • Page 90: Schematic Diagram (Handset)

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 33 SCHEMATIC DIAGRAM (HANDSET) +3.3V Charge Current VDD3 BATTERY BATTERY+ 47uH SM140A-T 5.6nH +2.5V VDD2 VDD1 +1.8V 5.6K BATTERY- AVS_sense 5.6K 115kHz (TALK mode) TP20 BC807-40 CHARGE+ 10uH MA2Z72000L...
  • Page 91 KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT BATTERY A201 33nH 10.368MHz +2.5V 2.5V RESET 1 GND (1005) 2 ANT2 3 VCCPA TX DATA 4 GND ANT1 RFmodule 5 GND RESET 6 VCC_OC 7 GND TXDA RSSI...

  • Page 92: Schematic Diagram (Charger Unit)

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 34 SCHEMATIC DIAGRAM (CHARGER UNIT) Charge_plus DC_PLUG Charge_minus NC : No Components SCHEMATIC DIAGRAM (CHARGER UNIT)
  • Page 93 KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT RLY1 RLY10 RLY7 RLY9 R147 IC10 RLY8 R144 R301 C192 P3_4 C302 R305 P3_2 R303 R304 C303 C130 D301 C104 C103 C305 P1_1 P1_4 P1_2 P1_3 ACSO P1_5 P3_3...
  • Page 94 KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT...
  • Page 95 KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT...
  • Page 96 KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT...
  • Page 97 KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT A201 C44 C62 C123 REV_TEST2 REV_TEST1 C117 C116 C118 C111 C101 C102 C108 C112 C104 C119 C107 TP22 TP23...
  • Page 98 KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT C121 C34 L8 MAIL PUSH SOFT_A TALK LEFT RIGHT LED9 DOWN CLEAR LED4 LED7 LED6 LED5...

  • Page 99: Circuit Board (Base Unit_Main)

    KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT 38 CIRCUIT BOARD (CHARGER UNIT) 38.1. Component View PQUP11305Z CIRCUIT BOARD (CHARGER UNIT) Component View 38.2. Flow Solder Side View WHITE PQUP11305Z BLUE CIRCUIT BOARD (CHARGER UNIT) Flow Solder Side View...

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