Panasonic KX-TC2101BXB Service Manual
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Panasonic KX-TC2101BXB Service Manual

Panasonic KX-TC2101BXB Service Manual

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Telephone Equipment
KX-TC2101BXB

Cordless Phone

Black Version
(for Asia, Middle Near East and Other Areas)
© 2005 Panasonic Communications Co., Ltd. All
rights
reserved.
distribution is a violation of law.
ORDER NO. KM40510914CE
Unauthorized
copying
and

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Summary of Contents for Panasonic KX-TC2101BXB

  • Page 1: Cordless Phone

    ORDER NO. KM40510914CE Telephone Equipment KX-TC2101BXB Cordless Phone Black Version (for Asia, Middle Near East and Other Areas) © 2005 Panasonic Communications Co., Ltd. All rights reserved. Unauthorized copying distribution is a violation of law.

  • Page 2: Table Of Contents

    KX-TC2101BXB 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. CONTENTS Page...
  • Page 3 KX-TC2101BXB 26 REPLACEMENT PARTS LIST 29 SCHEMATIC DIAGRAM (HANDSET) 26.1. Base Unit 30 CIRCUIT BOARD (BASE UNIT) 26.2. Handset 30.1. Component View 26.3. Accessories and Packing Materials 30.2. Flow Solder Side View 27 FOR SCHEMATIC DIAGRAM 31 CIRCUIT BOARD (HANDSET) 27.1.

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

    KX-TC2101BXB 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-TC2101BXB 1.2. How to recognize that Pb Free Solder is Used (Example: Handset P.C.B.) DTCOUT TXPOWER C873 C852 C872 AUTO R843 C851 C861 C866 R837 C865 C864 C853 R831 Q802 LED703 Q804 R848 C854 NDTC C870 LED702 C848 R833 C857...

  • Page 6: Operating Instructions

    KX-TC2101BXB 4 OPERATING INSTRUCTIONS 4.1. Battery 4.1.1. Recharge 4.1.2. Battery information 4.1.3. Battery Replacement...

  • Page 7: Location Of Controls

    KX-TC2101BXB 4.2. Location of Controls 4.2.1. Base Unit 4.2.2. Handset...

  • Page 8: Connection

    KX-TC2101BXB 4.3. Connection...

  • Page 9: Troubleshooting

    KX-TC2101BXB 4.4. Troubleshooting...

  • Page 10: Disassembly Instructions

    KX-TC2101BXB 5 DISASSEMBLY INSTRUCTIONS Shown in Fig.- To Remove Remove Cabinet Cover Screws (2.6 × 12)....... (A) × 4 Main P.C. Board Main P.C. Board...
  • Page 11 KX-TC2101BXB Shown in Fig.- To Remove Remove Cabinet Cover Battery compartment cover. Screws (2.6 × 12)......(B) × 2 Follow the procedure. Main P. C. Board Screw (2.6 × 12)......(C) × 1 Main P. C. Board...

  • Page 12: Troubleshooting Guide

    KX-TC2101BXB 6 TROUBLESHOOTING GUIDE Cross Reference: Check Power (P.13) Bell Reception (P.14) Check Battery Charge (P.15) Check Link (P.16) Check Handset Transmission (P.17) Check Handset Reception (P.18)

  • Page 13: Check Power

    KX-TC2101BXB 6.1. Check Power Cross Reference: Note: Reset Circuit (P.34) *CPU: IC201 Power Supply Circuit (P.33) Cross Reference: Note: Charge Circuit (P.35) *CPU: IC701 *: Each measurement points are shown in CIRCUIT BOARD (BASE UNIT) (P.59) or CIRCUIT BOARD (HANDSET) (P.61)

  • Page 14: Bell Reception

    KX-TC2101BXB 6.2. Bell Reception Cross Reference: Note: Check Link (P.16) *CPU: IC201 Telephone Line Interface (P.35) Cross Reference: Note: Check Link (P.16) *CPU: IC701 *: Each measurement points are shown in CIRCUIT BOARD (BASE UNIT) (P.59) or CIRCUIT BOARD (HANDSET) (P.61)

  • Page 15: Check Battery Charge

    KX-TC2101BXB 6.3. Check Battery Charge Cross Reference: Note: Charge Circuit (P.35) *CPU: IC201 Cross Reference: Note: Reset Circuit (P.39) *CPU: IC701 *: Each measurement points are shown in CIRCUIT BOARD (BASE UNIT) (P.59) or CIRCUIT BOARD (HANDSET) (P.61)

  • Page 16: Check Link

    KX-TC2101BXB 6.4. Check Link **: Refer to Adjustment (P.20) Note: *CPU: IC201 *RF IC: IC401 *: Each measurement points are shown in CIRCUIT BOARD (BASE UNIT) (P.59) or CIRCUIT BOARD (HANDSET) (P.61)

  • Page 17: Check Handset Transmission

    KX-TC2101BXB **: Refer to Adjustment (P.23). Note: *CPU: IC701 *RF IC: IC801 *: Each measurement points are shown in CIRCUIT BOARD (BASE UNIT) (P.59) or CIRCUIT BOARD (HANDSET) (P.61) 6.5. Check Handset Transmission Cross Reference: SIGNAL ROUTE (P.41)

  • Page 18: Check Handset Reception

    KX-TC2101BXB 6.6. Check Handset Reception Cross Reference: SIGNAL ROUTE (P.41)

  • Page 19: Adjustments (Base Unit)

    KX-TC2101BXB 7 ADJUSTMENTS (BASE UNIT) If your unit has below symptoms, adjust or confirm each item using remedy column from the table. Symptom Remedy* The base unit does not respond to a call from handset. Make adjustments in item (A) The base unit does not transmit or the transmit frequency is off.

  • Page 20: How To Change The Channel

    KX-TC2101BXB 7.2. How to change the channel Note: Refer to Adjustment Standard (Base Unit) (P.21) for connection. 7.3. Adjustment Adjustment Items Test Mode Adjustment *Procedure Check or Point Replace Parts • Adjust T404 so that the reading of the Digital Voltmeter is 1.5 ± 0.3 V.
  • Page 21 KX-TC2101BXB...

  • Page 22: Adjustments (Handset)

    KX-TC2101BXB 8 ADJUSTMENTS (HANDSET) If your unit has below symptoms, adjust or confirm each item using remedy column from the table. Symptom Remedy* The movement of Battery Low Indicator is wrong. Make confirmation in item (A) The base unit does not respond to a call from the handset.

  • Page 23: How To Change The Channel

    KX-TC2101BXB 8.2. How to change the channel 8.3. Adjustment Adjustment Items Test Mode Adjustment *Procedure Check or Point Replace Parts (A) Battery Low 3ch Talk 1. Adjust the power supply voltage to DC 3.60V and confirm so that the IC801 Confirmation reading of oscilloscope is High.
  • Page 24 KX-TC2101BXB TALK FLASH LED701 REDIAL PROGRAM RINGER PAUSE OUTPUT LOUD...

  • Page 25: Rf Specification

    KX-TC2101BXB 9 RF SPECIFICATION 9.1. Base Unit Item Value Refer to -.* Remarks TX Frequency 43.82 MHz ± 700 Hz ADJUSTMENTS (BASE UNIT) (C) at CH3 TX Power more than 10dBm ADJUSTMENTS (BASE UNIT) (D) at CH3 Line Modulation factor 2.7 KHz ±...

  • Page 26: Frequency Table (Mhz)

    KX-TC2101BXB 11 FREQUENCY TABLE (MHz) BASE UNIT HANDSET Channel Transmit Frequency Receive Frequency Transmit Frequency Receive Frequency 43.720 49.670 49.670 43.720 43.740 49.845 49.845 43.740 43.820 49.860 49.860 43.820 43.840 49.770 49.770 43.840 43.920 49.875 49.875 43.920 43.960 49.830 49.830 43.960...

  • Page 27: Explanation Of Cpu Data Communication

    KX-TC2101BXB 12 EXPLANATION OF CPU DATA COMMUNICATION 12.1. STAND-BY -> TALK, TALK -> STAND-BY *: The channel is changed if the noise interferes with the conversation.

  • Page 28: Ringing

    KX-TC2101BXB 12.2. Ringing...

  • Page 29: Changing The Channel

    KX-TC2101BXB 12.3. Changing the Channel...

  • Page 30: Ports For Transmitting And Receiving Of Data

    KX-TC2101BXB 12.4. Ports for transmitting and receiving of data Handset: Base Unit: transmitting (TX) ... 25 Pin transmitting (TX) ... 23 Pin receiving (RX) ... 12 Pin receiving (RX) ... 10 Pin 12.5. Waveform of DATA used for cordless transmission and reception The DATA which is transmitted from the Handset to the Base Unit is combination of DATA 0, DATA 1, DATA Delimit.
  • Page 31 KX-TC2101BXB...

  • Page 32: Block Diagram (Base Unit)

    KX-TC2101BXB 14 CIRCUIT OPERATION (BASE UNIT) 14.1. Outline Base unit consists of the following ICs as shown in BLOCK DIAGRAM (BASE UNIT) (P.31). • CPU: IC201 − Controlling the whole system − Forming/analyzing all data signals (ACK, CMD signal etc.) −...

  • Page 33: Power Supply Circuit

    KX-TC2101BXB 14.2. Power Supply Circuit The power supply to the CPU and RF IC from AC Adaptor (+12V) is shown in the diagram below. The base unit power supply is DC12V. The handset power is supplied from DC 3.6V battery (Nickel-Cadmium battery) which is installed in the handset.

  • Page 34: Reset Circuit

    KX-TC2101BXB 14.3. Reset Circuit After power supply from AC adaptor, the reset signal for CPU is making in IC401. Refer to the below waveform. <Fig. 2> <Fig. 3>...

  • Page 35: Charge Circuit

    KX-TC2101BXB 14.4. Charge Circuit Circuit Operation: When charging the handset on the base unit, the charge current is as follows; DC12V → L101 → D102 → L103 → CH+(Base) → +CONTACT J601(Handset) → L602 → D602 → CN1-1 → Battery →...

  • Page 36: Transmitter/Receiver

    KX-TC2101BXB 14.6. Transmitter/Receiver Base Unit and Handset mainly consist of RF (Radio Frequency) IC and CPU. Base Unit and Handset transmit/receive voice signal and data signal through the antenna on carrier frequency. Signal Path: *Refer to CDL TX/RX in SIGNAL ROUTE (P.41).
  • Page 37 KX-TC2101BXB 14.6.3. RF signal operation/control and PLL operation (RF UNIT) Base unit radio frequency signal received by antenna passes through duplexer (DPX401). RF signal is amplified by RF AMP. RF signal received from RF IC is mixed with RX local frequency at Mixer to generate 10.695 MHz wide band IF.
  • Page 38 KX-TC2101BXB...

  • Page 39: Block Diagram (Handset)

    KX-TC2101BXB 16 CIRCUIT OPERATION (HANDSET) 16.1. Outline Handset consists of the following ICs as shown in BLOCK DIAGRAM (HANDSET) (P.38). • CPU: IC701 − Forming/analyzing all data signals (ACK or CMD signal) − All interfaces (ex; LED, Key, Buzzer, Detector Circuit, Charge/Battery Low) −...

  • Page 40: Battery Low / Power Down Detector

    KX-TC2101BXB 16.3. Battery Low / Power Down Detector Circuit Operation: “Battery Low” and “Power Down” are detected by RF IC which check the voltage from battery. Shortly, every detected blocks are inside of RF IC. The detected voltage is as follows;...

  • Page 41: Signal Route

    KX-TC2101BXB 17 SIGNAL ROUTE Each signal route is as follows.

  • Page 42: Cpu Data (Base Unit)

    KX-TC2101BXB 18 CPU DATA (Base Unit) 18.1. IC201...

  • Page 43: Cpu Data (Handset)

    KX-TC2101BXB 19 CPU DATA (Handset) 19.1. IC701...

  • Page 44: Rf Ic (Base Unit And Handset)

    KX-TC2101BXB 20 RF IC (Base Unit and Handset) 20.1. Base Unit: IC401, Handset: IC801...

  • Page 45: How To Replace The Flat Package Ic

    KX-TC2101BXB 21 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 46: Flat Package Ic Installation Procedure

    KX-TC2101BXB 21.3. 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 47: Cabinet And Electrical Parts (Base Unit)

    KX-TC2101BXB 22 CABINET AND ELECTRICAL PARTS (BASE UNIT)

  • Page 48: Cabinet And Electrical Parts (Handset)

    KX-TC2101BXB 23 CABINET AND ELECTRICAL PARTS (HANDSET)

  • Page 49: Accessories And Packing Materials

    KX-TC2101BXB 24 ACCESSORIES AND PACKING MATERIALS...

  • Page 50: Terminal Guide Of The Ics, Transistors And Diodes

    KX-TC2101BXB 25 TERMINAL GUIDE OF THE ICs, TRANSISTORS AND DIODES 25.1. Base Unit 25.2. Handset...

  • Page 51: Replacement Parts List

    KX-TC2101BXB 26 REPLACEMENT PARTS LIST 1. RTL (Retention Time Limited) Ref. Part No. Part Name & Description Remarks Note: PQGT18269Z NAME PLATE The marking (RTL) indicates that the Retention Time is 26.1.2. Main P.C.Board Parts limited for this item. After the discontinuation of this assembly in production,...
  • Page 52 KX-TC2101BXB Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks R101 ERDS2TJ221 R436 ERJ3GEYJ101 R102 ERJ3GEYJ102 R437 ERJ3GEYJ103 R103 ERJ3GEYJ102 R438 ERJ3GEYJ153 R104 ERDS2TJ151 R439 ERJ3GEYJ101 R105 ERJ3GEYJ102 R440 ERJ3GEYJ681 R106 ERJ3GEYJ391 R441...

  • Page 53: Handset

    KX-TC2101BXB Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks C437 ECUV1H562KBV 0.0056 (TRANSISTORS) C438 ECUV1H560JCV Q701 B1ADDE000022 TRANSISTOR(SI) C439 ECUV1C104KBV Q702 B1ABDE000020 TRANSISTOR(SI) C440 ECUV1H430GCV Q704 B1ABDE000020 TRANSISTOR(SI) C441 ECUV1H270GCV Q705 B1GBCFGJ0011...

  • Page 54: Accessories And Packing Materials

    KX-TC2101BXB Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks R827 ERJ3GEYJ103 C844 ECUV1H101JCV 100P R829 ERJ3GEYJ222 2.2K C845 ECEA1CKA100 R830 ERJ3GEYJ222 2.2K C846 ECUV1H103KBV 0.01 R831 ERJ3GEYJ683 C847 ECUV1C473KBV 0.047 R832 ERJ3GEYJ221...

  • Page 55: For Schematic Diagram

    KX-TC2101BXB 27 FOR SCHEMATIC DIAGRAM 27.1. Base Unit (SCHEMATIC DIAGRAM (BASE UNIT)) 1. DC voltage measurements are taken with an oscilloscope or a tester with a ground. 2. The schematic diagrams and circuit board may be modified at any time with the development of new technology.

  • Page 56: Schematic Diagram (Base Unit)

    KX-TC2101BXB...
  • Page 57 KX-TC2101BXB...
  • Page 58 KX-TC2101BXB...
  • Page 59 KX-TC2101BXB L102 L101 ANT1 D102 C102 SA301 PO301 R104 L301 Q102 C469 C104 Q103 C302 R307 Q301 D308 Q302 Q303 D307 C462 C308 C460 R314 Q304 DV401 C431 C312 C444 C443 PQUP11346Z X401 C435 SW201 C209 R414...
  • Page 60 KX-TC2101BXB...
  • Page 61 KX-TC2101BXB ANT2 C806 BLACK DPX1 C834 L701 X701 C701 D701 VBAT L603 D602 D601 MIC1 MIC2 C601 J601 J602...
  • Page 62 KX-TC2101BXB TALK FLASH LED701 REDIAL PROGRAM RINGER PAUSE OUTPUT LOUD...
  • Page 63 KX-TC2101BXB A.I./N KXTC2101BXB...

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