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Panasonic KX-TCA256X Service Manual
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Panasonic KX-TCA256X Service Manual

Panasonic KX-TCA256X Service Manual

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DECT Portable Station
KX-TCA256X
(for Taiwan and Mexico)
© 2006 Panasonic Communications Co., Ltd. All
rights reserved. Unauthorized copying and distribu-
tion is a violation of law.
ORDER NO. KMS0611302CE

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  • Page 1 ORDER NO. KMS0611302CE DECT Portable Station KX-TCA256X (for Taiwan and Mexico) © 2006 Panasonic Communications Co., Ltd. All rights reserved. Unauthorized copying and distribu- tion is a violation of law.

  • Page 2: Table Of Contents

    KX-TCA256X TABLE OF CONTENTS PAGE PAGE 1 Safety Precautions -----------------------------------------------3 15.1. Cabinet electrical Parts Location 1.1. For Service Technicians ----------------------------------3 (Handset) -------------------------------------------------- 55 1.2. Disposal Cautions------------------------------------------3 15.2. Accessories and Packing Materials ----------------- 57 2 Warning --------------------------------------------------------------4 15.3. Replacement Part List ---------------------------------- 58 2.1.

  • Page 3: Safety Precautions

    KX-TCA256X 1 Safety Precautions 1.1. For Service Technicians ICs and LSIs are vulnerable to static electricity. When repairing, the following precautions will help prevent recurring malfunctions. 1. Cover the plastic parts boxes with aluminum foil. 2. Ground the soldering irons.

  • Page 4: Warning

    KX-TCA256X 2 Warning 2.1. 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 con- tains lead. We will use PbF when discussing the lead free solder used in our manufacturing process which is made from Tin, (Sn), Silver, (Ag), and Copper, (Cu).

  • Page 5: Specifications

    KX-TCA256X 3 Specifications Handset Charger Unit Standard: DECT= (Digital Enhanced Cordless Telecommunications) GAP= (Generic Access Profile) Power Source: Rechargeable Ni-MH battery AC Adaptor Power Consumption Standby: Approx. 270W Maximum: Approx. 270W Number of Channels: 120 Duplex Channels Frequency Range: 1.88GHz to 1.9GHz...

  • Page 6: Technical Descriptions

    RESET 96X64 LCD-BACK LIGHT AOUT (Blue) 49 24 23 SCLK MIDI 21 SRQ KEY-BACK LIGHT IC301 (Green) 20 ERQ 33,34,37 SP-PHONE LED 30 CLK (Red) LOGIC IC IC303 CHARGE LED (Red and Green) BATT 6.00MHz X101 KX-TCA256X BLOCK DIAGRAM (HANDSET)

  • Page 7: Circuit Operation (Handset)

    KX-TCA256X 4.2. Circuit Operation (Handset) 4.2.1. Outline Handset consists of the following ICs as shown in Block Diagram (Handset) (P.6). • DECT BBIC (Base Band IC): IC201 - All data signals (forming/analyzing ACK or CMD signal) - All interfaces (ex: Key, Detector Circuit, Charge, DC/DC Converter, LCD) Include EEPROM and Flash memory EEPROM stores the temporary operating parameters (for RF, etc.)

  • Page 8: Block Diagram (Rf Unit)

    KX-TCA256X 4.3. Block Diagram (RF Unit)

  • Page 9: Circuit Operation (Rf Unit)

    KX-TCA256X 4.4. Circuit Operation (RF Unit) To measure the charge-current, R616-619 transfer the current to a voltage. When the charge-current is 200mA, the voltage is 0.05V. IC602 amplifies the voltage to 24.5time, then the output voltage is 24.5X0.05=1.225V. IC601 is DC/DC convertor. This IC adjusts CII to 1.25V.

  • Page 10: Location Of Controls And Components

    KX-TCA256X 5 Location of Controls and Components 5.1. Location of Controls (Handset)

  • Page 11: Installation Instructions

    KX-TCA256X 6 Installation Instructions 6.1. Connection • Use only the included Panasonic AC adaptor (KX-TCA1-2). 6.2. Battery 6.2.1. Battery Installation Insert the batteries as shown. Close the cover as indicated by the arrow. 6.2.2. Battery Charge At the time of shipment, the battery is not charged.

  • Page 12: Battery Information

    KX-TCA256X 6.2.3. Battery Information After your Panasonic battery is fully charged [at 25°C]: Operation Operating Time While in use (TALK) 17 hrs approx. While not in use (Standby) 270 hrs approx. • Battery charge may be shortened depending on usage conditions and ambient temperature.

  • Page 13: Operation Instructions

    KX-TCA256X 7 Operation Instructions 7.1. Soft Key Display Icons and information shown on the display will vary depending on the state of use. To select an item shown on the display, press the corresponding soft buttons.

  • Page 14: Settings Menu Chart (Handset)

    KX-TCA256X 7.2. Settings Menu Chart (Handset)

  • Page 15: Key Lock

    KX-TCA256X 7.3. Key Lock You can lock the dialling buttons while the PS is in idle status. 7.4. Selecting the Display Language • When set to "Auto", the language settings of the Business Telephone System will be used automatically. • The display language of both the PS and Business Telephone System can be selected, and both should be set to the same lan- guage.
  • Page 16 KX-TCA256X 7.5.2. Main Menu-while in standby mode 7.5.3. Sub menu-while in off-hook/during a conversation 7.5.4. PBX Feature Menu...
  • Page 17 KX-TCA256X 7.5.5. Troubleshooting 7.5.6. Power ON/OFF 7.5.7. Using the Handset Phone book...
  • Page 18 KX-TCA256X 7.5.8. Using the PBX System Phone book 7.5.9. Using the PBX Extension Phone book 7.5.10. Character Mode Table...
  • Page 19 KX-TCA256X 7.5.11. Editing • * The valid digits are "0" through "9", " ", " ", PAUSE. • To change a character or digit, move the joystick to highlight it, press to delete it, then enter the new character or digit.
  • Page 20 KX-TCA256X 7.5.14. Using the Incoming Call Log 7.5.15. Using the Incoming Call Log Group 7.5.16. Using the PBX System Phone book • * Press to confirm each entries. • When storing an outside phone number, the line access number will be stored automatically. The line access number must be...

  • Page 21: Hot Key Dial

    KX-TCA256X 7.5.17. Hot Key Dial The phone numbers stored in the handset phone book can be assigned as hot key. • A will be displayed next to hot key numbers which have a phone book item registered to them.

  • Page 22: Troubleshooting Guide

    KX-TCA256X 8 Troubleshooting Guide Flow Chart Cross Reference: Check Power (Handset) (P.23) Check Battery Charge (Handset) (P.24) Bell Reception (Handset) (P.27) Check Link (Handset) (P.26) Check Handset Transmission (P.27) Check Handset Reception (P.27)

  • Page 23: Check Power (Handset)

    KX-TCA256X 8.1. Check Power (Handset) Cross Reference Power Supply Circuit/Reset Circuit (P.7) Note: BBIC is IC201. 8.2. RF Unit Cross Reference: Circuit Operation (RF Unit) (P.9)

  • Page 24: Check Battery Charge (Handset)

    KX-TCA256X 8.3. Check Battery Charge (Handset) Note: BBIC is IC201.

  • Page 25: Charge Off

    KX-TCA256X 8.3.1. Charge OFF Note: BBIC is IC201.

  • Page 26: Check Link (Handset)

    KX-TCA256X 8.4. Check Link (Handset) Cross Reference Adjustment (Handset) (P.36)

  • Page 27: Check Handset Transmission

    KX-TCA256X 8.5. Check Handset Transmission Cross Reference: Signal Route (P.9) 8.6. Check Handset Reception Cross Reference: How to Check the Handset Receiver (P.42). Signal Route (P.9) 8.7. Bell Reception (Handset) Cross Reference: Check Link (Handset) (P.26) How to Check the Handset Speaker (P.42)

  • Page 28: Service Fixture & Tools

    KX-TCA256X 9 Service Fixture & Tools...

  • Page 29: Disassembly And Assembly Instructions

    KX-TCA256X 10 Disassembly and Assembly Instructions 10.1. Handset Shown in Fig.- To Remove Remove Screws (2 × 10)..(A) × 4 Rear Cabinet Follow the procedure. Main P.C. Board Main P.C. Board...

  • Page 30: Charger Unit

    KX-TCA256X 10.2. Charger Unit Shown in Fig.- To Remove Remove Screws (2.6 × 14)..(B) × 2 Lower Cabinet Main P.C. Board Main P.C. Board...

  • Page 31: Measurements And Adjustments

    KX-TCA256X 11 Measurements and Adjustments 11.1. Check Procedure (Handset) 11.1.1. Preparation 11.1.1.1. Equipment Required • DECT tester: Rhode & Scorers, CMD 60 is recommended. • Frequency counter: it must be precise to be able to measure 1Hz (precision; ±4ppm). Hewlett Packard, 53131A is recommended.

  • Page 32: Download Manual

    KX-TCA256X 11.1.3. Download Manual 11.1.3.1. Step [1] Before Downloading (Configuration Setting) [1]-(1) Execute "Flash Program.exe" 11.1.3.2. [1]-(2) Press Config [1]-(3) Press OK Selected item will be stored. Connect the download PC cable with selected come port (COM1 or COM2 or COM3 or COM4).
  • Page 33 KX-TCA256X 11.1.3.3. Step [3] Select Download file [3]-(1) Download Program Main Menu Push "Reference" to select the download file. (Download Filename tca256vXXX.hex) XXX=Version...
  • Page 34 KX-TCA256X 11.1.3.4. Step [4] Download Start [4]-(1) Click "download" key [4]-(2) Turn the power of target (TCA256) to [OFF] (Keep pressing "POWER" key for while 2 seconds) [4]-(3) Keep pressing "POWER" key until step [4]-(6) This operation will not turn the power of target to on.
  • Page 35 KX-TCA256X [4]-(5) Communication check "OK" If communication check become "OK", Display will show "CRC OK". If communication NG, click "cancel" key, then back to step [4]-(1) and try download again. [4]-(6) Downloading Start After several seconds, Display shows "Flash Program Start".

  • Page 36: Adjustments (Handset And Charger Unit)

    KX-TCA256X [4]-(7) Downloading Complete If downloading finished, display shows "Download finished successfully!". Click "off" then disconnect the serial PC cable. 11.2. Adjustments (Handset and Charger Unit) 11.2.1. Adjustment (Handset) Items Adjustment Procedure* Check or Point Replace Parts (A)* 1.8V Supply Confirma- 1.
  • Page 37 KX-TCA256X Items Adjustment Procedure* Check or Point Replace Parts (I)* Transmitted Power Con- TP601 Remove the Antenna before starting step from 1 to 4. IC201, firmation 1. Configure the DECT tester (CMD60) as follows; IC601, <Setting> IC602, • Test mode: PP IC603, •...
  • Page 38 KX-TCA256X Items Adjustment Procedure* Check or Point Replace Parts (N) Timing Confirmation Follow steps 1 to 3 of (I) above. IC601, 4.Confirm that the Timing accuracy is < ± 0.5ppm. R631,C649, IC201 (O)* RSSI Level Confirmation Follow steps 1 to 3 of (I) above.
  • Page 39 KX-TCA256X 11.2.2. Adjustment Standard (Handset) When connecting the Simulator Equipments for checking, please refer to below. C673 L618 C661 C616 C654 C656 L615 L614 R614 R611 C650 L631 C624 R612 L611 C653 C670 R610 C625 FIL601 C662 L619 R608 R606 R605...
  • Page 40 KX-TCA256X CN402 CN405 R212 R219 C225 D306 D305 SW11 SW40 SW01 SW31 SW41 SW21 SW52 SW42 SW51 SW02 SW32 SW53 SW12 SW22 SW03 SW13 SW23 SW33 SW43 CN403_1 CN403_2...

  • Page 41: Rf Specification (Handset)

    When connecting the Simulator Equipments for checking, please refer to below. 11.2.4.1. Flow Solder Side View JT601 JT602 IC601 12Ω/2W Digital Volt Meter Vop V+ Isens KX-TCA256X CIRCUIT BOARD (CHARGER UNIT) Flow Solder Side View 11.3. RF Specification (Handset) Item Value Refer to -. ** Remarks TX Power...

  • Page 42: How To Check The Handset Speaker

    KX-TCA256X 11.4. How to Check the Handset Speaker 1. Prepare the digital voltmeter, and set the selector knob to ohm meter. 2. Put the probes at the speaker terminals as shown below. How to Check the Handset Receiver 11.5. 1. Prepare the digital voltmeter, and set the selector knob to ohm meter.

  • Page 43: Frequency Table (Mhz)

    KX-TCA256X 11.6. Frequency Table (MHz) HANDSET Channel No Transmit Frequency Receive Frequency 1893.888 1893.888 1892.160 1892.160 1890.432 1890.432 1888.704 1888.704 1886.976 1886.976 1885.248 1885.248 1883.520 1883.520 1881.792 1881.792 Note: Channel No. 10: In the Test Mode on Handset.

  • Page 44: How To Replace A Flat Package Ic

    KX-TCA256X 11.7. How To Replace a 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 sol- dering iron and a cutter knife, you can easily remove the ICs that have more than 100 pins.

  • Page 45: Schematic Diagram

    KX-TCA256X 12 Schematic Diagram 12.1. For Schematic Diagram 12.1.1. Handset Notes: 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 46: Schematic Diagram (Handset)

    KX-TCA256X 12.2. Schematic Diagram (Handset) battery BATTERY+ + C102 CK1 BATT JT101 CK10 BATTERY- - 0.047u C108 Q101 CHG+ L101 47uF 10uH D102 C106 C107 R101 Z0.1 1.0u CK11 BATT R119 C120 R103 L102 R106 CK13 10uH C114 100k D101 JT102 1.0u...
  • Page 47 D7/TST0 PWM2 D6/TST0 CN301 PWM1 D5/ERQ PWM0 D4/SRQ PANEL D304 D3/ARQ D306 R306 VIBRATOR DrvGND D2/SCLK DGND R308 CK12 R309 D2.7V R311 R310 Q303 (21) (22) IC303 (23) C306 Z0.1 C307 Z0.1 R312 R313 680R KX-TCA256X: SCHEMATIC DIAGRAM (HANDSET) X101...

  • Page 48: Handset (Rf Unit)

    KX-TCA256X 12.3. Handset (RF Unit) BATT R613 FB606 C609 0.01 27nH R606 R608 C601 R607 C610 C604 C606 2200p R605 R604 C607 0.01 1000p R603 0.01 6.8k C605 3.3k C622 C608 C620 C621 C623 C603 C684 L602 L601 1000p 4.7nH 4.7nH...

  • Page 49: Charger Unit

    KX-TCA256X 12.4. Charger Unit...

  • Page 50: Printed Circuit Board

    R202 R110 C209 SW03 SW13 SW23 C207 R208 R214 Q104 C110 R216 R217 R117 C120 C108 C109 SW33 SW43 Q102 Q103 CN403_1 CN403_2 R314 C103 C102 C423 KX-TCA256X: CIRCUIT BOARD Bottom View JT101 JT102 C429 KX-TCA256X: CIRCUIT BOARD Component View...

  • Page 51: Charger Unit

    KX-TCA256X 13.2. Charger Unit 13.2.1. Component View C602 CN601 IC602 KX-TCA256X CIRCUIT BOARD (CHARGER UNIT) Component View 13.2.2. Flow Solder Side View JT601 JT602 IC601 Vop V+ Isens KX-TCA256X CIRCUIT BOARD (CHARGER UNIT) Flow Solder Side View...

  • Page 52: Appendix Information Of Schematic Diagram

    KX-TCA256X 14 Appendix Information of Schematic Diagram 14.1. CPU Data (Handset) 14.1.1. IC201 (BBIC) Pin No Description Connection at Normal mode at Reset mode P3_7/PD7 LCD_A0 P3_1/PD1 RXDSG P3_5/PD5 SPAMP CD P3_4/PD4 D,I/O MIDI ERQ P3_3/PD3 PAON P3_2/PD2 PSEL RFCLK...
  • Page 53 KX-TCA256X Pin No Description Connection at Normal mode at Reset mode ← AVS_sense ← ADC3 ← LDO1_sense ← LDO1_CTRL ← LDO2_CTRL ← VBAT2 ← VBAT1 AVS2 AVD2 LSR+/REF LSR+ LSR-/REF LSR- LSR_HS/CIDIN- LSR_HS VREF_HS/CIDOUT OPEN ← MIC- ← VREF- ←...

  • Page 54: Terminal Guide Of The Ics, Transistors And Diodes

    KX-TCA256X 14.2. Terminal Guide of the ICs, Transistors and Diodes 14.2.1. Handset 14.2.2. Charger Unit...

  • Page 55: (Handset)

    KX-TCA256X 15 Exploded View and Replacement Parts List 15.1. Cabinet and electrical Parts Location (Handset) 15.1.1. Handset...
  • Page 56 KX-TCA256X 15.1.2. Charger Unit...

  • Page 57: Accessories And Packing Materials

    KX-TCA256X 15.2. Accessories and Packing Materials...

  • Page 58: Replacement Part List

    KX-TCA256X 15.3. Replacement Part List Ref. Part No. Part Name & Description Remarks Note: PSBC1041Z1 PUSH BUTTON, CURSOL ABS-HB 1. RTL (Retention Time Limited) PSKK1052Z1 LID, BATTERY ABS-HB PSHE1167Y SPACER, BATTERY COVER The marking (RTL) indicates that the Retention Time is...
  • Page 59 KX-TCA256X Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks L608 PQLQR4C2N7S COIL C229 F1G1C104A083 L610 G1C3N3ZA0061 COIL C230 ECUE1A683KBQ 0.068 L611 G1C3N3ZA0061 COIL C231 ECUE1H330JCQ L612 PSLQR1S27NJ COIL C301 ECUV0J105KBV L614 PQLQR4C5N6S...
  • Page 60 KX-TCA256X Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks C653 F1G1H2R0A577 R411 ERJ2GEJ101 C654 F1G1H100A420 R412 ERJ2GEJ330 C656 ECUE1H1R5CCQ R413 ERJ2GEJ101 C657 F1G1H8R0A420 R417 ERJ2GEJ330 C660 F1G1H100A420 R421 D0GA123JA004 C661 ECUE1H330JCQ R423...
  • Page 61 KX-TCA256X 15.3.2.2. Main P.C.Board Parts Ref. Part No. Part Name & Description Remarks PCB200 PSWPTCA255CE CHARGER P.C.BOARD ASS'Y (RTL) (ICs) IC601 PQVIMC34063M IC602 C0ABAA000088 (DIODE) D601 MA738 DIODE(SI) (COIL) L601 G0A470EA0020 COIL (JACK) CN601 K2EZ2B000044 JACK (CAPACITORS) C601 EEEFK1E221P C603...

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