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Panasonic KX-TG1843ALS Service Manual
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Panasonic KX-TG1843ALS Service Manual

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Telephone Equipment
KX-TG1843ALS
KX-TGA122AZS
KX-TGA121AZS
Digital Cordless Answering System
Silver Version
(for Australia)
© 2005 Panasonic Communications Co., Ltd. All
rights
reserved.
distribution is a violation of law.
ORDER NO. KM40509891CE
Unauthorized
copying
and

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Summary of Contents for Panasonic KX-TG1843ALS

  • Page 1 ORDER NO. KM40509891CE Telephone Equipment KX-TG1843ALS KX-TGA122AZS KX-TGA121AZS Digital Cordless Answering System Silver Version (for Australia) © 2005 Panasonic Communications Co., Ltd. All rights reserved. Unauthorized copying distribution is a violation of law.

  • Page 2: Table Of Contents

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS Note: Because CONTENTS 4 is the extract from the Operating Instructions of 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-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 23.4. BRIDGE MODIFICATION PROCEDURE 30.2. Handset (SCHEMATIC DIAGRAM (HANDSET)) 24 CABINET AND ELECTRICAL PARTS (BASE UNIT) 30.3. Charger Unit (SCHEMATIC DIAGRAM (CHARGER UNIT)) 25 CABINET AND ELECTRICAL PARTS (HANDSET) 26 CABINET AND ELECTRICAL PARTS (CHARGER UNIT)

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

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 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. We will use PbF solder when discussing the lead free solder used in our manufacturing process which is made from Tin (Sn), Silver (Ag), and Copper (Cu).

  • Page 5: How To Recognize That Pb Free Solder Is Used

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 1.2. How to recognize that Pb Free solder is used (Example: Handset P.C.B.) Marked PQUP11278Z BAT GND POWER VDD2 VDD1 C114 C115 C120 C113 C109 C122 JTAG SP_TEST1 C100 C103 SP_TEST2 VDD3 R21 R20 (Component View) Note: The location of the “PbF”...

  • Page 6: Operating Instructions

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 4 OPERATING INSTRUCTIONS 4.1. Battery 4.1.1. Battery Installation 1. Insert the batteries negative ( ) terminal first. 2. Close the handset cover. Note: • • • • Use only rechargeable Ni-MH batteries HHR-4EPT. 4.1.2. Battery Charge Place the handset on the base unit for about 7 hours before initial use.
  • Page 7 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 8: Location Of Controls

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 4.2. Location of Controls 4.2.1. Base Unit 4.2.2. 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 9: Connections

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 4.3. Connections 4.3.1. 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 PQLV19ALX and telephone line cord supplied with this unit.

  • Page 10: Guide To Settings

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 4.4. 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. • • • • When customising the base unit and the handset, the current item or setting is indicated by 4.4.1.

  • Page 11: For Service Hint

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 4.4.4. Handset Settings 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 12: Disassembly Instructions

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 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 × 14)..(B) × 6 Operational P.C.Board...

  • Page 13: Handset

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 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...

  • Page 14: Charger Unit

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 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 15: How To Replace The Handset Lcd

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 6 HOW TO REPLACE THE HANDSET LCD...

  • Page 16: Troubleshooting Flowchart

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 7 TROUBLESHOOTING FLOWCHART Flow Chart Cross Reference: Check Power (P.17) Bell Reception (P.24) Check Battery Charge (P.18) Check Link (P.19) Check Handset Transmission (P.23) Check Handset Reception (P.23) SIGNAL ROUTE (P.51) Check Caller ID (P.23) Check Base Speakerphone Transmission (P.23)

  • Page 17: Check Power

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 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.46) 7.1.2. Handset Cross Reference: Power Supply Circuit/Reset Circuit (P.49)

  • Page 18: Check Battery Charge

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 7.2. Check Battery Charge 7.2.1. Base Unit Cross Reference: Charge Circuit (P.49) 7.2.2. Handset Cross Reference: Check Power (P.17) Charge Circuit (P.49) 7.2.3. Charger Unit Cross Reference: Charge Circuit (P.49)

  • Page 19: Check Link

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 7.3. Check Link 7.3.1. Base Unit Cross Reference: Power Supply Circuit (P.46) Check Point (Base Unit) (P.25)
  • Page 20 KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS Cross Reference: Check Point (Base Unit) (P.25)
  • Page 21 KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 7.3.2. Handset Cross Reference: Power Supply Circuit/Reset Circuit (P.49) Check Point (Handset) (P.34)
  • Page 22 KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS Cross Reference: Check Point (Handset) (P.34)

  • Page 23: Check Handset Transmission

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 7.4. Check Handset Transmission Cross Reference: SIGNAL ROUTE (P.51) 7.5. Check Handset Reception Cross Reference: HOW TO CHECK THE SPEAKER OR RECEIVER (P.43). SIGNAL ROUTE (P.51) 7.6. Check Caller ID Cross Reference: SIGNAL ROUTE (P.51) 7.7.

  • Page 24: Bell Reception

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 7.9. Bell Reception 7.9.1. Base Unit 7.9.2. Handset Cross Reference: Telephone Line Interface (P.47) Check Link (P.19) HOW TO CHECK THE SPEAKER OR RECEIVER (P.43) 7.10. Check TAM Operation Cross Reference: Power Supply Circuit (P.46)

  • Page 25: Troubleshooting By Symptom (Base Unit And Charger Unit)

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 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. 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 26 KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 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. Confirm the returned checksum value.
  • Page 27 KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS Items Check Procedure Check or Point Replace Parts Follow steps 1 to 6 of (I). (K) Frequency Offset Check IC2, IC4, R137, 7.Confirm that the frequency offset is < ± 45kHz. R125, C153, L8, L5, L10, L9,...
  • Page 28 KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS Items Check Procedure Check or Point Replace Parts Timing Confirmation Follow steps 1 to 6 of (I). IC2, IC4, R137, 7.Confirm that the Timing accuracy is < ± 2.0ppm. R125, C153, L8, L5, L10, L9,...
  • Page 29 KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS Items Check Procedure Check or Point Replace Parts (Q)* Audio Check 1. Link with Handset. IC4, CN1,SA1, L6, L7, D3, Q4, 2. Input -45dBm/1kHz to MIC of Handset. Q5, R23, R25, R26, R28, R63, Measure the Level at Line I/F and distortion level.

  • Page 30: The Setting Method Of Jig (Base Unit)

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 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 to be able to measure 1Hz (precision; ±4ppm).
  • Page 31 KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 8.2.2.2. PC Setting 1. Install the Batch file CD-ROM on your PC. 2. Open a window of MS-DOS mode from the start-up menu. 3. Change a directory. 4. Type “SET_COM=1” from the keyboard (when COM port 1 is used for the connection).
  • Page 32 KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS VDD4 VDD5 VDD3 VDD2...

  • Page 33: Adjustment Standard (Base Unit)

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 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 34: Troubleshooting By Symptom (Handset)

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 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 level in detail.
  • Page 35 KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 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 IC1, Q4, Q5, Charge Current Monitor 250mA.
  • Page 36 KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 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 37: Troubleshooting For Speakerphone (Handset)

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 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. Set line voltage to 48V and line current to 40mA.

  • Page 38: The Setting Method Of Jig (Handset)

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 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 to be able to measure 1Hz (precision; ±4ppm).
  • Page 39 KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 9.3.2.2. PC Setting 1. Install the Batch file CD-ROM on your PC. 2. Open a window of MS-DOS mode from the start-up menu. 3. Change a directory. 4. Type “SET_COM=1” from the keyboard (when COM port 1 is used for the connection).

  • Page 40: Adjustment Standard (Handset)

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS A201 C44 C62 C123 REV_TEST2 REV_TEST1 C117 C116 C118 C111 C101 C102 C108 C112 C104 C119 C107 TP22 TP23...

  • Page 41: Things To Do After Replacing Ic

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 10 THINGS TO DO AFTER REPLACING IC Cautions: Since this page is common to each country, it may not apply to some models in your country. The contents below are the minimum adjustments required for operation.

  • Page 42: Rf Specification

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 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 Check Point (Base Unit) (J)

  • Page 43: How To Check The Speaker Or Receiver

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 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. 13 FREQUENCY TABLE (MHz)
  • Page 44 KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS...

  • Page 45: Block Diagram (Base Unit)

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 15 CIRCUIT OPERATION (BASE UNIT) 15.1. Outline Base Unit consists of the following ICs as shown in BLOCK DIAGRAM (BASE UNIT) (P.44). • • • • DECT BBIC (Base Band IC): IC4 − − − − Handling all the audio, signal and data processing needed in a DECT base unit −...

  • Page 46: Power Supply Circuit

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 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; • • • • DECT BBIC (IC4): CN2 (+6V) →...

  • Page 47: Telephone Line Interface

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 15.3. Telephone Line Interface <Function> • • • • Bell signal detection • • • • Clip signal detection • • • • ON/OFF hook circuit • • • • Audio circuits • • • • DTMF tone signal circuits Bell &...

  • Page 48: Block Diagram (Handset)

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 16 BLOCK DIAGRAM (HANDSET) SPEAKER RXDA Speech Burst Decoding Decoding TXDA Speech Burst RECEIVER Module Encoding Encoding RSSI ADPCM SYDA Codec SYEN Analog Interface Filter SYCL Front CHARGE(+) CHARGE XTAL CHARGE CHARGE CIRCUIT CONTACTS CHARGE DETECT...

  • Page 49: Circuit Operation (Handset)

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 17 CIRCUIT OPERATION (HANDSET) 17.1. Outline Handset consists of the following ICs as shown in BLOCK DIAGRAM (HANDSET) (P.48). • • • • DECT BBIC (Base Band IC): IC1 − − − − All data signals (forming/analyzing ACK or CMD signal) −...

  • Page 50: Circuit Operation (Charger Unit)

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 18 CIRCUIT OPERATION (CHARGER UNIT) 18.1. Power Supply Circuit The power supply is as shown.

  • Page 51: Signal Route

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 19 SIGNAL ROUTE...
  • Page 52 KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS...

  • Page 53: Cpu Data (Base Unit)

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 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 AD14 RESET RESET Hi-Z SP_AMP_CS SP_AMP_CS...
  • Page 54 KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 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 DAB8 DAB1 D.I/O DAB1 DAB9 D.I/O...
  • Page 55 KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS Pin No Description Connection at Normal mode at Reset mode...

  • Page 56: Cpu Data (Handset)

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 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 LED_BIAS/P3[6]/PD LED_BIAS I-PD SDA1/P2[5] D,I/O LCD_SI...
  • Page 57 KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 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] D,I/O COL0 I-PD P1[4]/INT4n Key_LED P1[3]/INT3n...

  • Page 58: Engineering Mode

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 22 ENGINEERING MODE 22.1. Base Unit...
  • Page 59 KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 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 [R] + 2 [R] + 3...
  • Page 60 KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 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 61: Handset

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 22.2. Handset...
  • Page 62 KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS Note: *: When you enter the address, please refer to the table in Note: (P.59) of ENGINEERING MODE. ex.) Items (*4) Address Default Data New Data Possible Adjusted Possible Adjusted Remarks Value MAX (hex) Value MIN (hex)

  • Page 63: How To Replace The Flat Package Ic

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 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 64: Flat Package Ic Installation Procedure

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 23.3. FLAT PACKAGE IC INSTALLATION PROCEDURE 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.

  • Page 65: Cabinet And Electrical Parts (Base Unit)

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 24 CABINET AND ELECTRICAL PARTS (BASE UNIT)

  • Page 66: Cabinet And Electrical Parts (Handset)

    25 CABINET AND ELECTRICAL PARTS (HANDSET) Note: (*1) The rechargeable Ni-MH battery HHR-4EPT is available through sales route of Panasonic. (*2) This cable is fixed by welding. Refer to HOW TO REPLACE THE HANDSET LCD (P.15). (*3) Attach the spacer (No. 122) to the exact location described above.

  • Page 67: Cabinet And Electrical Parts (Charger Unit)

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 26 CABINET AND ELECTRICAL PARTS (CHARGER UNIT)

  • Page 68: Accessories And Packing Materials

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 27 ACCESSORIES AND PACKING MATERIALS 27.1. KX-TG1843ALS...

  • Page 69: Kx-Tga121Azs

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 27.2. KX-TGA121AZS...

  • Page 70: Terminal Guide Of The Ics, Transistors And Diodes

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 28 TERMINAL GUIDE OF THE ICs, TRANSISTORS AND DIODES 28.1. Base Unit 28.2. Handset...

  • Page 71: Charger Unit

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 28.3. Charger Unit...

  • Page 72: Replacement Parts List

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 29 REPLACEMENT PARTS LIST 1. RTL (Retention Time Limited) Ref. Part No. Part Name & Description Remarks Note: PQBC10431Z1 BUTTON, ANSWER ON ABS-HB The marking (RTL) indicates that the Retention Time is PQSX10293Z KEYBOARD SWITCH, TAM KEY...
  • Page 73 KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks PQLQR2M6N8KT COIL ERJ3GEYJ104 100K ELJPA6R8MF COIL ERJ3GEYJ474 470K G1C100MA0072 COIL ERJ3GEYJ101 G1C100MA0072 COIL ERJ3GEYJ102 (JACKS AND CONNECTOR) ERJ3GEYJ101 PQJJ1TA15Z...
  • Page 74 KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks R367 ERJ2GEJ102 ECUV1H101JCV 100P R368 ERJ2GEJ102 ECUV1H101JCV 100P R369 ERJ2GEJ102 ECUV1H101JCV 100P R370 ERJ2GEJ102 C101 ECUV1H102KBV 0.001 R371 ERJ2GE0R00...

  • Page 75: Handset

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks (DIODES) PQWIA130EXRR IC (EEPROM) (*1) LED901 PQVDBR1111C (TRANSISTORS) LED902 LNJ308G8JRA PQVTFDN335N TRANSISTOR(SI) LED903 PQVDBR1111C B1ADGE000004 TRANSISTOR(SI) (RESISTORS) B1ADGE000004 TRANSISTOR(SI)

  • Page 76: Charger Unit

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks ERJ2GEJ181 C103 ECUV1H100DCV ERJ3GEYJ684 680K C104 ECUV1A105KBV ERJ2GEJ104 100K C107 ECUV1H101JCV 100P ERJ3GEY0R00 C108 ECUE1H100DCQ ERJ3GEY0R00 C109 ECUE1H100DCQ ERJ2GEJ103...

  • Page 77: Fixtures And Tools

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 29.4.1. KX-TG1843ALS Ref. Part No. Part Name & Description Remarks PQLV19ALX AC ADAPTOR (for Base Unit) PQLV200ALX AC ADAPTOR (for Charger Unit) PQJA10168Z CORD, TELEPHONE PQQX14599Z INSTRUCTION BOOK (*1) PQQW14638Z QUICK GUIDE PQQW14930Z LEAFLET, 3 PACK...
  • Page 78 KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS Memo...

  • Page 79: For Schematic Diagram

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 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 diagram may be modified at any time with the development of new technology.

  • Page 80: Schematic Diagram (Base Unit_Main)

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 31 SCHEMATIC DIAGRAM (BASE UNIT_MAIN) 33uH (2125) Loop Current LINE_DC 100K TEL_JACK 33uH (2125) 2.2K (2125) (2125) RLY1 C101 R106 180K K1000p K1500p C207 (1005) C102 R107 180K K1000p K1500p C206 (1005) (6332) (6332) TP15...
  • Page 81 KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS Loop Current +3.0V AD17 +3.0V AD16 AD15 RDY/BUSY AD14 RDY/BUSY R156 AD13 DAB15 ANS_LED DAB15 DQ15 AD12 DAB7 RESET D10p AD11 DAB14 LED0 DAB7 DQ14 AD10 DAB6 +3.0V R157 DAB13 SEG5 DAB14 DQ13 DAB5 2.2K +3.0V...
  • Page 82 KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 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 LED1 Q902 LED901 SP-PHONE R901 560...
  • Page 83 KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS Memo...

  • Page 84: Schematic Diagram (Handset)

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 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 (1005) (When on charge) CHARGE- 10uH...
  • Page 85 KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 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 8 RSSI (1005) RFCLK (1005) RX DATA 2.2K...

  • Page 86: Schematic Diagram (Charger Unit)

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 34 SCHEMATIC DIAGRAM (CHARGER UNIT) Charge_plus DC_PLUG Charge_minus NC : No Components SCHEMATIC DIAGRAM (CHARGER UNIT)
  • Page 87 KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 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 P0_3 P0_4 P0_5 P0_6 R369 C368...
  • Page 88 KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS...
  • Page 89 KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS...
  • Page 90 KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS...
  • Page 91 KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS A201 C44 C62 C123 REV_TEST2 REV_TEST1 C117 C116 C118 C111 C101 C102 C108 C112 C104 C119 C107 TP22 TP23...
  • Page 92 KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS C121 C34 L8 MAIL PUSH SOFT_A TALK LEFT RIGHT LED9 DOWN CLEAR LED4 LED7 LED6 LED5...

  • Page 93: Circuit Board (Base Unit_Main)

    KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS 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 KXTG1843ALS KXTGA122AZS KXTGA121AZS...

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