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Panasonic KX-TG8231B Service Manual
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Panasonic KX-TG8231B Service Manual

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Telephone Equipment
KX-TG8231B
KX-TG8232B
KX-TGA820B
Expandable Digital Cordless Answering
System
Black Version
(for U.S.A.)
© 2007 Panasonic Communications Co., Ltd. All
rights reserved. Unauthorized copying and distribu-
tion is a violation of law.
ORDER NO. KM40707353CE
F13

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Summary of Contents for Panasonic KX-TG8231B

  • Page 1 ORDER NO. KM40707353CE Telephone Equipment KX-TG8231B KX-TG8232B KX-TGA820B Expandable Digital Cordless Answering System Black Version (for U.S.A.) © 2007 Panasonic Communications Co., Ltd. All rights reserved. Unauthorized copying and distribu- tion is a violation of law.
  • Page 2 KX-TG8231B/KX-TG8232B/KX-TGA820B...

  • Page 3: Table Of Contents

    KX-TG8231B/KX-TG8232B/KX-TGA820B TABLE OF CONTENTS PAGE PAGE 1 Safety Precautions----------------------------------------------- 4 13.2. Circuit Board (Base Unit_Operation)---------------- 77 1.1. For Service Technicians --------------------------------- 4 13.3. Circuit Board (Handset) -------------------------------- 79 2 Warning -------------------------------------------------------------- 4 13.4. Circuit Board (Charger Unit)--------------------------- 81 2.1. Battery Caution--------------------------------------------- 4 14 Appendix Information of Schematic Diagram --------- 82 2.2.

  • Page 4: Safety Precautions

    KX-TG8231B/KX-TG8232B/KX-TGA820B 1 Safety Precautions 1.1. For Service Technicians • Repair service shall be provided in accordance with repair technology information such as service manual so as to prevent fires, injury or electric shock, which can be caused by improper repair work.

  • Page 5: Discarding Of P. C. Board

    KX-TG8231B/KX-TG8232B/KX-TGA820B 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-TG8231B/KX-TG8232B/KX-TGA820B 3 Specifications Note: • Design and specifications are subject to change without notice. Note for Service: • Optional headset: KX-TCA60, KX-TCA86, KX-TCA88HA, KX-TCA92, KX-TCA93, KX-TCA94, or KX-TCA95...

  • Page 7: Technical Descriptions

    KX-TG8231B/KX-TG8232B/KX-TGA820B 4 Technical Descriptions 4.1. Block Diagram (Base Unit)

  • Page 8: Circuit Operation (Base Unit)

    KX-TG8231B/KX-TG8232B/KX-TGA820B 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...
  • Page 9 KX-TG8231B/KX-TG8232B/KX-TGA820B 4.2.2. Power Supply Circuit The power is supplied to the DECT BBIC, RF Module, EEPROM, FLASH MEMORY, TAM Companion 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) →...
  • Page 10 KX-TG8231B/KX-TG8232B/KX-TGA820B 4.2.3. Telephone Line Interface <Function> • Bell signal detection • Clip signal detection • ON/OFF hook circuit Bell & Clip (: Calling Line Identification Presentation: Caller ID) signal detection: In the standby mode, Q3 is open to cut the DC loop current and decrease the ring load.

  • Page 11: Block Diagram (Handset)

    KX-TG8231B/KX-TG8232B/KX-TGA820B 4.3. Block Diagram (Handset) RXDA Speech Burst Decoding Decoding TXDA RECEIVER Speech Burst Module Encoding Encoding RSSI ADPCM SYDA Codec SYEN Analog Interface Filter SYCL Front Headset KEY-BACK LIGHT SPEAKER CHARGE(+) CHARGE XTAL CHARGE CHARGE CIRCUIT CONTACTS CHARGE DETECT Q4,Q5,Q9 10.368...

  • Page 12: Circuit Operation (Handset)

    KX-TG8231B/KX-TG8232B/KX-TGA820B 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-TG8231B/KX-TG8232B/KX-TGA820B 4.5. Circuit Operation (Charger Unit) 4.5.1. Power Supply Circuit The power supply is as shown.

  • Page 14: Signal Route

    KX-TG8231B/KX-TG8232B/KX-TGA820B 4.6. Signal Route...
  • Page 15 KX-TG8231B/KX-TG8232B/KX-TGA820B...

  • Page 16: Location Of Controls And Components

    KX-TG8231B/KX-TG8232B/KX-TGA820B 5 Location of Controls and 5.1.2. Handset Components 5.1. Controls 5.1.1. Base Unit 5.2. Displays...

  • Page 17: Installation Instructions

    KX-TG8231B/KX-TG8232B/KX-TGA820B 6 Installation Instructions 6.1. Connections...

  • Page 18: Battery

    KX-TG8231B/KX-TG8232B/KX-TGA820B 6.2. Battery 6.2.2. Battery Charge 6.2.1. Battery Installation and Replacement Note for service: The battery strength may not be indicated correctly if the battery is disconnected and connected again, even after it is fully charged. In that case, by recharging the battery as mentioned above, you will get a correct indication of the battery strength.
  • Page 19 KX-TG8231B/KX-TG8232B/KX-TGA820B 6.2.3. Battery Level 6.2.4. Panasonic Ni-MH Battery Performance (supplied batteries)

  • Page 20: Operation Instructions

    KX-TG8231B/KX-TG8232B/KX-TGA820B 7 Operation Instructions 7.1. Programmable Settings...
  • Page 21 KX-TG8231B/KX-TG8232B/KX-TGA820B...
  • Page 22 KX-TG8231B/KX-TG8232B/KX-TGA820B...

  • Page 23: Registering A Handset To A Base Unit

    KX-TG8231B/KX-TG8232B/KX-TGA820B 7.2. Registering a Handset to a Base Unit 7.2.1. Deregistering a Handset 7.3. Copying Handset Phonebook Entries...

  • Page 24: Error Messages

    KX-TG8231B/KX-TG8232B/KX-TGA820B 7.4. Error Messages...

  • Page 25: Troubleshooting

    KX-TG8231B/KX-TG8232B/KX-TGA820B 7.5. Troubleshooting...
  • Page 26 KX-TG8231B/KX-TG8232B/KX-TGA820B...
  • Page 27 KX-TG8231B/KX-TG8232B/KX-TGA820B...
  • Page 28 KX-TG8231B/KX-TG8232B/KX-TGA820B...
  • Page 29 KX-TG8231B/KX-TG8232B/KX-TGA820B...

  • Page 30: Service Mode

    KX-TG8231B/KX-TG8232B/KX-TGA820B 8 Service Mode 8.1. Engineering Mode 8.1.1. Base Unit...
  • Page 31 KX-TG8231B/KX-TG8232B/KX-TGA820B Frequently Used Items (Base Unit) ex.) Items Address Default Data New Data Remarks Frequency 00 01 Use these items in a READ-ONLY mode to confirm the contents. Careless rewriting may 00 10~00 14 Given value cause serious damage to the computer system.
  • Page 32 KX-TG8231B/KX-TG8232B/KX-TGA820B 8.1.2. Handset...
  • Page 33 KX-TG8231B/KX-TG8232B/KX-TGA820B Frequently Used Items (Handset) ex.) Items Address Default Data New Data Possible Adjusted Possible Adjusted Remarks Value MAX (hex) Value MIN (hex) Battery Low 00 04 (*2) Frequency 00 01 00 10~00 14 Given value Note: (*1) When you enter the address or New Data, please refer to the table below.

  • Page 34: Copying Phonebook Items When Repairing

    KX-TG8231B/KX-TG8232B/KX-TGA820B 8.2. 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. Note: • BS=Base unit, HS=Handset •...
  • Page 35 KX-TG8231B/KX-TG8232B/KX-TGA820B Note: • BS=Base unit, HS=Handset • 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.23).

  • Page 36: How To Clear User Setting

    KX-TG8231B/KX-TG8232B/KX-TGA820B 8.3. 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: • The reset menus differ depending on the following operations. • This operation should not be performed for a usual repair.

  • Page 37: Troubleshooting Guide

    KX-TG8231B/KX-TG8232B/KX-TGA820B 9 Troubleshooting Guide 9.1. Troubleshooting Flowchart Cross Reference: Check Power (P.38) Bell Reception (P.46) Check Battery Charge (P.39) Check Link (P.40) Check Handset Transmission (P.46) Check Handset Reception (P.46) Signal Route (P.14) Check Caller ID (P.46) Check TAM Operation (P.47)
  • Page 38 KX-TG8231B/KX-TG8232B/KX-TGA820B 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:...
  • Page 39 KX-TG8231B/KX-TG8232B/KX-TGA820B 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.38) Charge Circuit (P.12) 9.1.2.3. Charger Unit Cross Reference: Charge Circuit (P.12)
  • Page 40 KX-TG8231B/KX-TG8232B/KX-TGA820B 9.1.3. Check Link 9.1.3.1. Base Unit Cross Reference: Check Point (Base Unit) (P.48) Power Supply Circuit (P.9) Check the RF part (P.42)
  • Page 41 KX-TG8231B/KX-TG8232B/KX-TGA820B 9.1.3.2. Handset Cross Reference: Check Point (Handset) (P.48) Power Supply Circuit/Reset Circuit (P.12) Check the RF part (P.42)
  • Page 42 KX-TG8231B/KX-TG8232B/KX-TGA820B 9.1.4. Check the RF part 9.1.4.1. Finding out the Defective part After All the Checkings or Repairing 1. Re-register the checked Handset to the checked Base Unit, and Regular HS to Regular BU. Note: If you need to register a handset, refer to Registering a Handset to a Base Unit (P.23)
  • Page 43 KX-TG8231B/KX-TG8232B/KX-TGA820B 9.1.4.2. RF Check Flowchart Each item (1 ~ 4) of RF Check Flowchart corresponds to Check Table for RF part (P.44). Please refer to the each item. Note: (*1) Base unit - refer to (D) of Check Point (Base Unit) (P.48) Handset - refer to (F) of Check Point (Handset) (P.48)
  • Page 44 KX-TG8231B/KX-TG8232B/KX-TGA820B 9.1.4.3. Check Table for RF part Item BU (Base Unit) Check HS (Handset) Check Link Confirmation Normal 1. Register Regular HS to BU (to be 1. Register HS (to be checked) to Regular checked). (*1) BU. (*1) HS, BU Mode: [Normal mode] 2.
  • Page 45 KX-TG8231B/KX-TG8232B/KX-TGA820B 9.1.4.4. TEST RANGE Check Circuit block which range is defective can be found by the following check. Item BU (Base Unit) Check HS (Handset) Check Range Confirmation TX TEST 1. Register Regular HS to BU (to be checked). 1. Register HS (to be checked) to Regular BU.
  • Page 46 KX-TG8231B/KX-TG8232B/KX-TGA820B 9.1.5. Check Handset Transmission 9.1.6. Check Handset Reception Cross Reference: Signal Route (P.14) Cross Reference: How to Check the Handset Speaker or Receiver (P.66). Signal Route (P.14) 9.1.7. Check Caller ID Cross Reference: Signal Route (P.14) 9.1.8. Bell Reception 9.1.8.1.
  • Page 47 KX-TG8231B/KX-TG8232B/KX-TGA820B 9.1.9. Check TAM Operation A) How to change the Auto Disconnect activation (time) Some Telephone Company lines (fiber or cable) ON Hook and OFF Hook voltages are lower than conventional lines, which may cause a malfunction of Auto Disconnect detection. To solve this problem, try changing the Auto Disconnect activation through the procedures below.

  • Page 48: Troubleshooting By Symptom (Base Unit)

    KX-TG8231B/KX-TG8232B/KX-TGA820B 9.2. Troubleshooting by Symptom (Base Unit) 9.2.1. Check Point (Base Unit) Please follow the items below after repairing. Note: After the measuring, suck up the solder of TP. *: PC Setting (P.58) is required beforehand. The connections of simulator equipment are as shown in Adjustment Standard (Base Unit) (P.60).

  • Page 49: How To Replace The Flat Package

    KX-TG8231B/KX-TG8232B/KX-TGA820B 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.
  • Page 50 KX-TG8231B/KX-TG8232B/KX-TGA820B 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.

  • Page 51: How To Replace The Llp

    KX-TG8231B/KX-TG8232B/KX-TGA820B 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 52 KX-TG8231B/KX-TG8232B/KX-TGA820B 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.

  • Page 53: Disassembly And Assembly Instructions

    KX-TG8231B/KX-TG8232B/KX-TGA820B 10 Disassembly and Assembly Instructions 10.1. Disassembly Instructions 10.1.1. Base Unit...
  • Page 54 KX-TG8231B/KX-TG8232B/KX-TGA820B...
  • Page 55 KX-TG8231B/KX-TG8232B/KX-TGA820B 10.1.2. Handset...
  • Page 56 KX-TG8231B/KX-TG8232B/KX-TGA820B 10.1.3. Charger Unit...

  • Page 57: Assembly Instructions

    KX-TG8231B/KX-TG8232B/KX-TGA820B 10.2. Assembly Instructions 10.2.1. Fix the LCD to the Main P.C.Board (Handset)

  • Page 58: Measurements And Adjustments

    KX-TG8231B/KX-TG8232B/KX-TGA820B 11 Measurements and Adjustments 11.1. The Setting Method of JIG (Base Unit) 11.1.1. Preparation 11.1.1.1. Equipment Required • Frequency counter: It must be precise enough to measure intervals of 1 Hz (precision; ±4 ppm). Hewlett Packard, 53131A is recommended.
  • Page 59 KX-TG8231B/KX-TG8232B/KX-TGA820B 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 60: Adjustment Standard (Base Unit)

    KX-TG8231B/KX-TG8232B/KX-TGA820B 11.2. Adjustment Standard (Base Unit) When connecting the simulator equipment for checking, please refer to below. 11.2.1. Flow Solder Side View R103 C104 R125 R106 C92 C94 R131 R132 R140 C165 C164 C136 C53 C166 L1R/TP_RLY4 PQUP11527Z KX-TG7200 KX-TG7220...

  • Page 61: Adjustment Standard (Charger Unit)

    KX-TG8231B/KX-TG8232B/KX-TGA820B 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 Volt Mater /2 W DC POWER DC 6.5 V...

  • Page 62: The Setting Method Of Jig (Handset)

    KX-TG8231B/KX-TG8232B/KX-TGA820B 11.4. The Setting Method of JIG (Handset) 11.4.1. Preparation 11.4.1.1. Equipment Required • Frequency counter: It must be precise enough to measure intervals of 1 Hz (precision; ±4 ppm). Hewlett Packard, 53131A is recommended. • DC power: It must be able to output at least 1 A current under 2.4 V for Handset.
  • Page 63 KX-TG8231B/KX-TG8232B/KX-TGA820B 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 64: Adjustment Standard (Handset)

    KX-TG8231B/KX-TG8232B/KX-TGA820B 11.5. Adjustment Standard (Handset) When connecting the simulator equipment for checking, please refer to below. 11.5.1. Component View ANT1 C54 C55 R189 R191 R188 VDD3 REV+ SP_TEST2 SP_TEST1 REV_TEST2 C119 REV- R164 VDD4 R197 C170 R155 IC11 IC12 R169...

  • Page 65: Things To Do After Replacing Ic Or X'tal

    KX-TG8231B/KX-TG8232B/KX-TGA820B 11.6. Things to Do after Replacing IC or X'tal 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.58) in The Setting Method of JIG (Base...

  • Page 66: How To Check The Handset Speaker Or Receiver

    KX-TG8231B/KX-TG8232B/KX-TGA820B 11.7. 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. 11.8. Frequency Table (MHz) BASE UNIT...

  • Page 67: Schematic Diagram

    KX-TG8231B/KX-TG8232B/KX-TGA820B 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.

  • Page 68: Schematic Diagram (Base Unit_Main)

    KX-TG8231B/KX-TG8232B/KX-TGA820B 12.2. Schematic Diagram (Base Unit_Main) ANT_1 ANT_2 1.5n C122 C155 R125 100k 2.7k 3.3 V +3.3V Q10 NC +2.5V 100k LOW_RAD GND1 GND14 ANT2 TXPO-SET LOW_RAD VCCPA GND12 +2.5V GND2 GND13 IC10 TX_AF GND3 GND10 +1.8V VDD_ANA RF UNIT ANT1 10.368 MHz...
  • Page 69 KX-TG8231B/KX-TG8232B/KX-TGA820B LINE_DC Loop Current 100k 2.2k 180k 1.5n (2125) For BR Caller ID, 180k Bell Signal 1.5n (2125) RX_AF (2125) For BR TX_AF +2.5V 100k 100k ForNL TP_RLY1 L1T/TP_RLY2 For JT 220p 220p L2T/TP_RLY3 L1R/TP_RLY4 Bell signal TP_RLY5 100k Charge Current 3.3 V...

  • Page 70: Schematic Diagram (Base Unit_Operation)

    KX-TG8231B/KX-TG8232B/KX-TGA820B 12.3. Schematic Diagram (Base Unit_Operation) ANSWER ON PLAY CN10-10 CN10-9 CN10-8 CN10-7 CN10-6 CN10-5 CN10-4 SKIP REPEAT ERASE CN10-3 CN10-2 ANS_ON VOL_UP LOCATOR CN10-1 VOL_DOWN PLAY STOP PLAY1 KX-TG8231/8232 SCHEMATIC DIAGRAM (Base Unit_Operation)
  • Page 71 KX-TG8231B/KX-TG8232B/KX-TGA820B Memo...

  • Page 72: Schematic Diagram (Handset)

    KX-TG8231B/KX-TG8232B/KX-TGA820B 12.4. Schematic Diagram (Handset) Backlight On 4.0V Backlight Off 3.5V 3.3V Charge Current BATTERY VDD4 +3.3V +4.2V VDD3 1.8V +1.8V 5.6n VDD1 2.5V +2.5V VDD2 5.6k 5.6k 384kHz (Talk Mode) except RU/UA R167 : 0 TP20 R168 : NC +2.5V...
  • Page 73 KX-TG8231B/KX-TG8232B/KX-TGA820B ANT1 BATTERY GND1 GND14 +2.5V R151 ANT2 TXPO-SET VCCPA GND12 10.368MHz RESET GND2 GND13 2.5V GND3 GND10 +1.8V TX DATA VDD_ANA ANT1 VDD_DIG *RESET RF Module GND4 GND9 R186 R170 SYRI TXDA GND5 GND8 RFCLK R188 R190 R191 RX DATA 2.2k...

  • Page 74: Schematic Diagram (Charger Unit)

    KX-TG8231B/KX-TG8232B/KX-TGA820B 12.5. Schematic Diagram (Charger Unit) R1 10 SCHEMATIC DIAGRAM (Charger Unit)

  • Page 75: Printed Circuit Board

    KX-TG8231B/KX-TG8232B/KX-TGA820B 13 Printed Circuit Board 13.1. Circuit Board (Base Unit_Main) 13.1.1. Component View R126 C156 R128 C158 C109 C108 C144 C103 R142 R129 C162 C110 C106 C119 R130 C157 IC10 C121 C159 C126 C129 C128 C127 R111 R110 R112 R134...
  • Page 76 KX-TG8231B/KX-TG8232B/KX-TGA820B 13.1.2. Flow Solder Side View for JIG R103 C104 R125 R106 C92 C94 R131 R132 R140 C165 C164 C136 C53 C166 L1R/TP_RLY4 PQUP11527Z KX-TG7200 KX-TG7220 KX-TG8200 KX-TG8220 KX-TG823 KX-TG8231/8232 CIRCUIT BOARD (Base Unit (Flow Solder Side View))

  • Page 77: Circuit Board (Base Unit_Operation)

    KX-TG8231B/KX-TG8232B/KX-TGA820B 13.2. Circuit Board (Base Unit_Operation) 13.2.1. Component View LED2 VOL_UP ANS_ON ERASE SKIP REPEAT LOCATOR VOL_DOWN STOP CN10 KX-TG8231/8232 CIRCUIT BOARD (Base Unit_Operation (Component View))
  • Page 78 KX-TG8231B/KX-TG8232B/KX-TGA820B 13.2.2. Flow Solder Side View PQU P11528Z for TG8 2 2 0 T G82 3 CN10 KX-TG8231/8232 CIRCUIT BOARD (Base Unit_Operation (Flow Solder Side View))

  • Page 79: Circuit Board (Handset)

    KX-TG8231B/KX-TG8232B/KX-TGA820B 13.3. Circuit Board (Handset) 13.3.1. Component View ANT1 C54 C55 R189 R191 R188 VDD3 SP_TEST2 SP_TEST1 REV_TEST2 C119 R164 VDD4 R197 C170 R155 IC11 IC12 R169 R156 C154 C155 R168 C169 R63 R66 JTAG C171 R167 C161 VDD1 R194...
  • Page 80 KX-TG8231B/KX-TG8232B/KX-TGA820B 13.3.2. Flow Solder Side View LED- LED1 C105 SOFT_A SOFT_C TALK CANCEL KX-TGA820 CIRCUIT BOARD (Handset (Flow Solder Side View))

  • Page 81: Circuit Board (Charger Unit)

    KX-TG8231B/KX-TG8232B/KX-TGA820B 13.4. Circuit Board (Charger Unit) 13.4.1. Component View CIRCUIT BOARD (Charger Unit (Component View)) 13.4.2. Flow Solder Side View TP4 (GND) CIRCUIT BOARD (Charger Unit (Flow Solder Side View))

  • Page 82: Appendix Information Of Schematic Diagram

    KX-TG8231B/KX-TG8232B/KX-TGA820B 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 *INT1/P11 I-PU VDDIO1 VDD1 VSS1 SDA1/P25 D.I/O SDA1 SCL1/P24 SCL1 *INT5/VDDE/P15 Open *INT2/P12 Low_rad I-PU...
  • Page 83 KX-TG8231B/KX-TG8232B/KX-TGA820B Pin No. Description Connection at Normal mode at Reset mode CIDINp CIDINp P14/*INT4 HOOK P13/*INT3 ADC2 ADC0 ADC0...

  • Page 84: Cpu Data (Handset)

    KX-TG8231B/KX-TG8232B/KX-TGA820B 14.2. CPU Data (Handset) 14.2.1. IC1 (BBIC) Pin No. Description Connection at Normal mode at Reset mode *INT1/P11 ROW1 I-PU VDDIO1 VDDIO1 VDD1 VDD1 VSS1 VSS1 LED1/PWM0/P20 I-PU LED2/PWM1/P21 LCD_CSB I-PU LED3 LED_BIAS/P36/PD6 RESET(RF) I-PD SDA1/P25 D.I/O SCL1/P24 *INT5/VDDE/P15...
  • Page 85 KX-TG8231B/KX-TG8232B/KX-TGA820B Pin No. Description Connection at Normal mode at Reset mode LDO1_Sense LDO1_Sense AVS2 AVS2 AVD2 AVD2 *LSR/REF LSRn LSRp/REF LSRp *MIC MICn VREFm VREFm VBUF AGND AGND MICp MICp VREFp VREFp COL0 I-PD P14/*INT4 KEY_LED P13/*INT3 ROW3 P22/CLK100 LCD_RESET...

  • Page 86: Terminal Guide Of The Ics, Transistors And Diodes

    KX-TG8231B/KX-TG8232B/KX-TGA820B 14.3. Terminal Guide of the ICs, Transistors and Diodes 14.3.1. Base Unit 14.3.2. Handset 14.3.3. Charger Unit...

  • Page 87: Exploded View And Replacement Parts List

    KX-TG8231B/KX-TG8232B/KX-TGA820B 15 Exploded View and Replacement Parts List 15.1. Cabinet and Electrical Parts (Base Unit)

  • Page 88: Cabinet And Electrical Parts (Handset)

    (*1) This cable is fixed by soldering. Refer to Fix the LCD to the Main P.C.Board (Handset) (P.57). (*2) The rechargeable Ni-MH battery HHR-4DPA (Capacity: up to 550 mAh) is available through sales route of Panasonic. (*3) Attach the spacer (No. 125) to the exact location described above.

  • Page 89: Cabinet And Electrical Parts (Charger Unit)

    KX-TG8231B/KX-TG8232B/KX-TGA820B 15.3. Cabinet and Electrical Parts (Charger Unit)

  • Page 90: Accessories And Packing Materials

    KX-TG8231B/KX-TG8232B/KX-TGA820B 15.4. Accessories and Packing Materials 15.4.1. KX-TG8231B...
  • Page 91 KX-TG8231B/KX-TG8232B/KX-TGA820B 15.4.2. KX-TG8232B...
  • Page 92 KX-TG8231B/KX-TG8232B/KX-TGA820B 15.4.3. KX-TGA820B...

  • Page 93: Replacement Part List

    KX-TG8231B/KX-TG8232B/KX-TGA820B 15.5. Replacement Part List Ref. Part No. Part Name & Description Remarks 1. RTL (Retention Time Limited) PQBX10400Z1 BUTTON, FUNCTION ABS-HB Note: PQSX10350Z KEYBOARD SWITCH The marking (RTL) indicates that the Retention Time PQSA10208Z ANTENNA PQJT10256Z CHARGE TERMINAL is limited for this item.
  • Page 94 KX-TG8231B/KX-TG8232B/KX-TGA820B Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks ERJ12YJ270 ECUE1A104KBQ ERJ2GEJ104 100K ECUE1H221JCQ 220P ERJ2GEJ473 ECUE1H221JCQ 220P ERJ2GEJ104 100K ECUE1C223KBQ 0.022 ERJ2GEYJ474 470K ECUE1A104KBQ ERJ2GEJ560X ECUV1C104KBV ERJ3GEYJ820 ECUE1A104KBQ ERJ3GEYJ821 ECUE1A104KBQ ERJ2GEJ104...
  • Page 95 KX-TG8231B/KX-TG8232B/KX-TGA820B Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks LED2 PQVDBR1111C LED11 B3ACB0000133 (COILS) 15.5.2. Handset G1C470M00025 COIL PQLQR2M5N6K COIL 15.5.2.1. Cabinet and Electrical Parts (IC FILTERS) J0JCC0000275 IC FILTER J0JCC0000286 IC FILTER Ref.
  • Page 96 ECUE1H102KBQ 0.001 Note: ECUE1H151JCQ 150P (*1) You can download and refer to the operating instruc- ECUE1H390JCQ tions (Instruction book) on TSN server. ECUE1H100DCQ ECUE1H100DCQ 15.5.4.1. KX-TG8231B ECUE1H100DCQ ECUE1A104KBQ F3F0J4760005 Ref. Part No. Part Name & Description Remarks ECUE1H102KBQ 0.001 C103...
  • Page 97 KX-TG8231B/KX-TG8232B/KX-TGA820B Ref. Part No. Part Name & Description Remarks P102 PQPH10088Z PROTECTION COVER (for Hand- set) P103 PQPH10101Z PROTECTION COVER (for Charger Unit) P104 PQPK16041Z GIFT BOX P105 PQXDDS400-8 MAGNET ELECTRIC TRANSDUCER, SECURITY TAG 15.5.4.3. KX-TGA820B Ref. Part No. Part Name & Description...

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