Panasonic KX-TCA256X Service Manual Download Page 6

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KX-TCA256X

4 Technical Descriptions

4.1.

Block Diagram (Handset)

CPU

IC201

BBIC

A/D

D/A

Analog
Front
End

Speech
Encoding

Speech
Decoding

DSP

ADPCM
Codec
Filter

BMC

RF
Interface

MIC

SYRI

RSSI

SYEN

RXDA

TXDA

To RF
Block

BATTERY
TERMINAL

CHARGE
CIRCUIT

CHARGE

CHARGE DETECT

CHARGE
CONTACTS

CHARGE

3.6V

VBAT2

XTAL

10.368

BATTERY

MHz

KEYPAD

COLUMNS

ROWS

LCD

96X64
dot

ON SWITCH

KX-TCA256X BLOCK DIAGRAM (HANDSET)

49 24

23 SCLK

30 CLK

21 SRQ

20 ERQ

AOUT

33,34,37

RECEIVER

SPEAKER

28~32, 40

35, 36, 37, 38

Burst
Encoding

Burst
Decoding

CHARGE

D102

RESET

CS 2

SCL

AMPLIFIER

IC401

Headset

JACK

SP_AMP Control

MIDI

IC301

LOGIC IC

LCD-BACK LIGHT
(Blue)

KEY-BACK LIGHT
(Green)

SP-PHONE LED
(Red)

CHARGE LED
(Red and Green)

6.00MHz

IC303

Q101,Q102,Q103
R7,R101,R103,R117

Q104

Q105

X100

2.75V

2.7V

1.85V

21 SYDA
22 SYCL

BATTERY -

X101

BATT

VIB

Summary of Contents for KX-TCA256X

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

Page 2: ... 26 8 5 Check Handset Transmission 27 8 6 Check Handset Reception 27 8 7 Bell Reception Handset 27 9 Service Fixture Tools 28 10 Disassembly and Assembly Instructions 29 10 1 Handset 29 10 2 Charger Unit 30 11 Measurements and Adjustments 31 11 1 Check Procedure Handset 31 11 2 Adjustments Handset and Charger Unit 36 11 3 RF Specification Handset 41 11 4 How to Check the Handset Speaker 42 11 5 Ho...

Page 3: ...arge basis Alternatively in some countries you may be able to return your products to your local retailer upon the purchase of an equivalent new product Disposing of this product correctly will help to save valuable resources and prevent any potential negative effects on human health and the environment which could otherwise arise from inappropriate waste handling Please contact your local authori...

Page 4: ...plash or damage to the PCB PbF solder will tend to splash if it is heated much higher than its melting point approximately 1100 F 600 C When applying PbF solder to double layered boards please check the component side for excess which may flow onto the opposite side See figure below 2 1 1 Suggested PbF Solder There are several types of PbF solder available commercially While this product is manufa...

Page 5: ...Procedure TDMA Time Division Multiple Access Battery Life Handset if batteries are fully charged Stand by Up to 120 hours Ni MH Talk Up to 17 Hours Ni MH Channel Spacing 1728kHz Bit rate Spacing 1152kbit s Operating Conditions 5 40 C 20 80 relative air humidity dry Modulation GFSK Gaussian Frequency Shift Keying RF Transmission Power approx 250mW Voice Coding ADPCM 32 kbit s Operation Range Up to ...

Page 6: ... MHz KEYPAD COLUMNS ROWS LCD 96X64 dot ON SWITCH 55 54 53 64 KX TCA256X BLOCK DIAGRAM HANDSET 47 46 63 62 49 24 23 SCLK 30 CLK 21 SRQ 20 ERQ 31 AOUT 39 41 33 34 37 4 1 50 RECEIVER SPEAKER 69 70 68 76 28 32 40 35 36 37 38 Burst Encoding Burst Decoding CHARGE D102 49 RESET CS 2 AO SI SCL AMPLIFIER IC401 Headset JACK SP_AMP Control 3 MIDI IC301 LOGIC IC LCD BACK LIGHT Blue KEY BACK LIGHT Green SP PHO...

Page 7: ... handset on the charger the charge current is as follows DC 9V 10V IC601 6 IC601 2 L601 JT601 Charger JT101 Handset L101 Q101 D102 BAT TERY Battery BATTERY R115 GND L102 JT102 Handset JT602 Charger R616 R617 R618 R619 GND DC GND In this way the BBIC on Handset detects the fact that the battery is charged The charge current is controlled by switching Q101 of Handset 4 2 4 Battery Low Power Down Det...

Page 8: ... IF bandpass filter LNA Mixer IC601 RSSI KX TCA256X RF UNIT RXDA SYCL SYDA SYEN FIL601 D601 RXDSG Loop filter TXDA SYRI PAON RXON PSEL BATT Voltage regulator Voltage regulator To CPU Block To CPU Block IC602 Antenna S H Demodulator 32 33 VCCS VCC1 VCC Voltage regulator IC603 VCC2 ...

Page 9: ...he portable station set the Q103 Base to High then Q102 is turned off As a result the charging current is stopped 4 5 Signal Route 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 Then...

Page 10: ...10 KX TCA256X 5 Location of Controls and Components 5 1 Location of Controls Handset ...

Page 11: ...ndicated by the arrow 6 2 2 Battery Charge At the time of shipment the battery is not charged Please charge the battery for more than 5 5 hours before initial use When the battery has been completely charged the charge indicator will change from red to green It is normal for the PS and charger to feel warm while the battery is charging Keep devices sensitive to magnetic fields away from the charge...

Page 12: ...g occurs during a conversation you can continue the call for a few minutes then the call will be discon nected automatically 6 2 5 Replacing the Batteries If flashes after a few telephone calls even when the batteries have been fully charged it is time to replace the batteries with new ones 1 Turn the power off to prevent memory loss 2 Press the notch on the cover firmly and slide it as indicated ...

Page 13: ...A256X 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: ...14 KX TCA256X 7 2 Settings Menu Chart Handset ...

Page 15: ...e 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 Refer to the Business Telephone System User manual for more details 7 5 DISPLAY 7 5 1 Display Icons ...

Page 16: ...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: ...17 KX TCA256X 7 5 5 Troubleshooting 7 5 6 Power ON OFF 7 5 7 Using the Handset Phone book ...

Page 18: ...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: ...ve the joystick to highlight it press to delete it then enter the new character or digit To clear an entire line press and hold To move the cursor to the left or right move the joystick or respectively 7 5 12 Deleting 7 5 13 Storing an item in the Handset Phone book 7 5 13 1 Using the Outgoing Call Log ...

Page 20: ...ncoming 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 identical to the PS s Line Access CD setting Call Option ...

Page 21: ...1 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: ...roubleshooting 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: ...23 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: ...24 KX TCA256X 8 3 Check Battery Charge Handset Note BBIC is IC201 ...

Page 25: ...25 KX TCA256X 8 3 1 Charge OFF Note BBIC is IC201 ...

Page 26: ...26 KX TCA256X 8 4 Check Link Handset Cross Reference Adjustment Handset P 36 ...

Page 27: ...sion 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: ...28 KX TCA256X 9 Service Fixture Tools ...

Page 29: ...29 KX TCA256X 10 Disassembly and Assembly Instructions 10 1 Handset Shown in Fig To Remove Remove 1 Rear Cabinet Screws 2 10 A 4 2 Follow the procedure 3 Main P C Board Main P C Board ...

Page 30: ...30 KX TCA256X 10 2 Charger Unit Shown in Fig To Remove Remove 4 Lower Cabinet Screws 2 6 14 B 2 5 Main P C Board Main P C Board ...

Page 31: ...Tool and PC EEPROM serial Tool Tool PSZZ2CA155EU PC which runs in DOS mode 11 1 2 PC Setting 11 1 2 1 Connections 11 1 2 2 PC Setting 1 Open a window of MS DOS mode from the start up menu 2 Change a directory 3 Type SET_COM 1 from the keyboard when COM port 1 is used for the connection 4 Type doskey Note See the table below for frequently used commands Command name Function Example ratepayer Read ...

Page 32: ... 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: ...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: ...6 This operation will not turn the power of target to on If target power turns on check following item Then try again from step 1 1 A Check serial PC cable connection PC with TCA256 B Check Configuration Refer to Step 1 2 C Check PC cable attachment of target 4 4 Click Download Communicating PC with Target Don t release the POWER key in this step If release the OFF key downloading will be failed ...

Page 35: ...ication 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 You can release the POWER key in this step ...

Page 36: ...firm that the charge current is ON OFF 3 SW to decrease current limit of PSU to 100mA 4 Confirm that the charge current is stable IC201 Q101 L101 L102 Q102 R101 R103 Q103 R117 D101 D102 D103 E Charge Detection OFF Confirmation 1 Stop supplying 6V to JT101 and JT102 2 Execute the command charge 3 Confirm that the returned value is 0x01 hex IC201 R118 C111 L101 L102 F Battery Monitor Confir mation 1...

Page 37: ...g 31 5 Adjust the B Field Modulation if required Execute the command Readmod and wrtmod xx where xx is the value IC201 IC601 K Frequency Offset Confir mation Follow steps 1 to 3 of I above 4 Confirm that the frequency Offset is 45kHz IC201 IC601 IC602 IC603 FIL601 C665 C661 L618 D601 C654 L616 R625 C657 L615 L614 C656 L610 C653 L611 C650 C646 R623 C642 C643 C645 R633 R634 R645 L619 C662 L617 L605 ...

Page 38: ... level 5 Confirm that the level is reference sample 1 5dBm and confirm that the dis tortion level is 5 6 Input 20dBm 1KHz to Line I F and measure Receiving level at CN401 1 and CN401 2 7 Confirm that the level is reference sample 1 5dBm and confirm that the dis tortion level is 5 IC201 R408 C410 IC401 R405 C430 C405 C409 C408 R406 C407 C432 IC301 IC201 R404 C404 R403 C403 S Headset Audio check and...

Page 39: ...04 C603 C605 C606 R613 R603 L601 L602 FB606 C677 IC603 C675 R423 R319 R427 CN202 1 2 C433 C114 X100 SP BATT GND GND UTX URX R B VIB CN301 D304 Q301Q302 Q304 C315 C301 C313 C302 R315 R106 R107 IC302 R303 20 C203 C201 C227 C228 C229 L201 SYRI IC301 21 R309 R206 R205 R207 L102 C460 R203 R204 C304 IC303 R312 R313 X101 JTAG Q101 1 80 61 60 41 40 R202 R214 R215 C206 C207R208 C406 R408 R421 R401 R404 C45...

Page 40: ... C220 C219 C218 C217 C216 C215 CN402 CN405 C225 R212 R219 D306 D305 D314 D313 D316 D312 D309 D310 D311 D308 SW11 SW40 SW1 SW41 SW42 SW32 SW22 SW23 SW43 SW01 SW2 SW31 SW21 SW51 SW53 SW03 SW33 SW13 SW12 SW02 SW52 CN403_1 CN403_2 R AF VOLT METER OSCILLO SCOPE 32Ω KX TCA256X CIRCUIT BOARD HANDSET Bottom View ...

Page 41: ...cross the register is 2 7V 0 2V Item Value Refer to Remarks TX Power 20 dBm 25 dBm Adjustment Handset I Modulation 360 kHz div 380 kHz div Adjustment Handset J Data type Fig31 Frequency Offset 45 kHz 45 kHz Adjustment Handset K Frequency Drift 30 kHz ms Adjustment Handset L RX Sensitivity 1000 ppm Adjustment Handset M Timing Accuracy 0 5 ppm Adjustment Handset N RSSI Level 0x11 hex 8 hex at 81dBm ...

Page 42: ... voltmeter and set the selector knob to ohm meter 2 Put the probes at the speaker terminals as shown below 11 5 How to Check the Handset Receiver 1 Prepare the digital voltmeter and set the selector knob to ohm meter 2 Put the probes at the receiver terminals as shown below ...

Page 43: ...l No 10 In the Test Mode on Handset HANDSET Channel No Transmit Frequency Receive Frequency 3 1893 888 1893 888 4 1892 160 1892 160 5 1890 432 1890 432 6 1888 704 1888 704 7 1886 976 1886 976 8 1885 248 1885 248 9 1883 520 1883 520 10 1881 792 1881 792 ...

Page 44: ...ard when cutting the pins with a cutter 2 Make a few cuts into the joint between the IC and its pins first and then cut off the pins thoroughly 3 While the solder melts remove it together with the IC pins When you attach a new IC to the board remove all solder left on the land with some tools like a soldering wire If some solder is left at the joint on the board the new IC will not be attached pro...

Page 45: ... 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: ... R103 10k R101 Q102 4 7K B 10K B E 1k R117 C107 1 0u JTAG R206 1k R207 1k R205 1k R202 10k R203 10k R204 10k D2 7V D2 7V C206 Z0 1 C205 Z0 1 D1 8V BATT D102 SW1 100k R106 NC R107 NC R211 NC R210 NC R209 NC R212 D2 7V C215 Z0 1 6V KB 1u C216 AG 0 047u C102 SW2 5 SW PUSH COM C209 NC C204 Z0 1 C210 Z0 22 C212 0 068uC213 0 068u C211 10p C214 1u C207 NC 7p C112 R120 100 battery D101 4 7V Z0 1 C111 C229...

Page 47: ...10k R310 NC R311 Z0 1 C306 Z0 1 C302 6V KB 1u C301 Z0 1 C303 47 R302 120 R301 D301 D302 Z1u C310 2 2u C309 IC302 PUMP Vout 1 Vin 5 GND 2 Dwn 3 C 4 C 6 L301 2 2u C311 Z0 1 C308 1000p C312 5 0V IC303 1 1A 2 3Y 3 2A 4 GND 5 2Y 6 3A 7 1Y 8 VCC NC C422 BATT D2 7V D2 7V D2 7V CN404 HEADSET_JACK 1 5 4 2 3 D2 7V C403 NC 0 R403 12 R308 D316 NC C412 6V KB 1u C313 C314 Z0 1 Q304 4 7K 100k R315 D2 7V NC C315 ...

Page 48: ...TT D601 C660 10p R626 220 L617 27nH C654 10p C634 3p L616 27nH R625 270 L620 5 6nH L619 33p C662 22nH C607 0 01 C657 8p IC602 1 PO 2 PSEL 3 PAON 4 VCC 5 PI 6 PIX 7 PSET 8 VCCS 9 PRAMP 10 POX R624 NC C651 68p C649 10p C647 10p PSEL C648 10p C642 5p C643 5p L612 27nH C650 10p R605 1k R606 1k R607 1k R608 1k R611 3 9k BATT C646 0 1 L614 5 6nH FB601 F B L615 5 6nH PAON L603 27nH FIL601 1 9GHz BPF 1 3 ...

Page 49: ...C604 0 001 R601 1 IC601 1 SC 2 SE 3 TC 4 GND 5 CII 6 Vcc 7 IpkS 8 DC C607 100u C606 NC C603 150p C602 NC JT602 CII JT601 R602 1 R603 1 R616 1 R611 NC R619 1 R618 1 R617 1 R614 F1k R612 F47k R615 F1k Isens R610 2 7k Vsw Vtc V Vn Vop F47k R613 IC602 1 IN 2 Vss 3 IN 4 OUT 5 Vcc KX TCA256X SCHEMATIC DIAGRAM CHARGER UNIT ...

Page 50: ...121 C305 C306 C307 C205 R311 Q303 R310 R301 R302 C684 C604 C603 C605 C606 R613 R603 L601 L602 FB606 C677 IC603 C675 R423 R319 R427 CN202 1 2 C433 C114 X100 SP BATT GND GND UTX URX R B VIB CN301 D304 Q301 Q302 Q304 C315 C301 C313 C302 R315 R106 R107 IC302 R303 20 C203 C201 C227 C228 C229 L201 SYRI IC301 21 R309 R206 R205 R207 L102 C460 R203 R204 C304 IC303 R312 R313 X101 JTAG Q101 1 80 61 60 41 40 ...

Page 51: ...RD CHARGER UNIT Component View CN601 C602 R619 R618 R617 R616 R615 3 IC602 1 4 5 R612 R614 L601 D601 C601 C605 C607 C604 R611 R610 C609 R613 PbF PSUP1441Z A CII C603 R601 R602 R603 C608 JT601 JT602 Vtc Vsw Iw 1 4 5 8 Vo Vin Vop V V Isens GND IC601 KX TCA256X CIRCUIT BOARD CHARGER UNIT Flow Solder Side View ...

Page 52: ...6 URX P0_1 D I URX I O 27 JTIO P0_2 D I JTAG I O 28 PCM_FSC1 P0_3 D I COL1 I O 29 PCM_FSC0 P0_4 D I COL2 I O 30 PCM_CLK P0_5 D I COL3 I O 31 PCM_DOUT P0_6 D I COL4 I O 32 PCM_DIN P0_7 D I COL5 I O 33 VDDIO 34 VSS 35 INT0n P1_0 D O ROW0 O O 36 INT1n P1_1 D O ROW1 O O 37 INT2n P1_2 D O ROW2 O O 38 INT3n P1_3 D O ROW3 O O 39 INT4n P1_4 D I MIDI_IRQ I O 40 VDDE INT5n P1_5 D O COL0 O 41 SCL2 P3_0 D O S...

Page 53: ... LDO1_sense A I I O 62 LDO1_CTRL A O O O 63 LDO2_CTRL A O O O 64 VBAT2 A I I O 65 VBAT1 A I I O 66 AVS2 67 AVD2 68 LSR REF A O LSR O O 69 LSR REF A O LSR O O 70 LSR_HS CIDIN A O LSR_HS O O 71 VREF_HS CIDOUT A O NC OPEN 72 MIC A I I O 73 VREF A O O O 74 VBUF A O O O 75 AGND A O O O 76 MIC A I I O 77 VREF CIDIN A O VREF O O 78 RSTN D I I O 79 VDDIO 80 VSS Pin No Description I O Connection at Normal ...

Page 54: ...54 KX TCA256X 14 2 Terminal Guide of the ICs Transistors and Diodes 14 2 1 Handset 14 2 2 Charger Unit ...

Page 55: ...55 KX TCA256X 15 Exploded View and Replacement Parts List 15 1 Cabinet and electrical Parts Location Handset 15 1 1 Handset ...

Page 56: ...56 KX TCA256X 15 1 2 Charger Unit ...

Page 57: ...57 KX TCA256X 15 2 Accessories and Packing Materials ...

Page 58: ...0AD01B00001 SPEAKER 113 PSHE1168Z SPACER VIB MOTOR 114 PSBC1041Z1 PUSH BUTTON CURSOL ABS HB 115 PSKK1052Z1 LID BATTERY ABS HB 116 PSHE1167Y SPACER BATTERY COVER 117 PSGT2720Y NAME PLATE 118 PSJC1006Z BATTERY TERMINAL 119 PSHR1309Z GUIDE SPEAKER ABS HB 120 L0AA02A00048 SPEAKER 121 PSKF1119Y1 CABINET COVER ASS Y ABS HB 122 PSKE1069Z3 COVER EARPHONE 123 PSHG1246Z SPEAKER RUBBER SHEET 124 PSHS1043Z NE...

Page 59: ...on Remarks C229 F1G1C104A083 0 1 C230 ECUE1A683KBQ 0 068 S C231 ECUE1H330JCQ 33P C301 ECUV0J105KBV 1 S C302 F1G1C104A083 0 1 C303 F1G1C104A083 0 1 C304 F1G1C104A083 0 1 C305 F1G1C104A083 0 1 C306 F1G1C104A083 0 1 C307 F1G1C104A083 0 1 C308 F1G1C104A083 0 1 C309 PSCU0JV225 2 2 C310 PSCU1AV105ZF 1 S C311 PSCU0JV225 2 2 C312 ECUE1H102KBQ 0 001 S C313 ECUV0J105KBV 1 S C314 F1G1C104A083 0 1 C401 ECUV1C...

Page 60: ...R308 PQ4R10XJ120 12 S R309 ERJ2GEYJ103 10K S R310 ERJ2GEYJ103 10K S R312 ERJ2GEJ105X 1M S R313 ERJ2GEYJ681 680 S R314 ERJ2GEYJ100 10 S R315 ERJ2GEJ104 100K S R319 PQ4R10XJ820 82 S R401 D0GA124JA004 120K R402 ERJ2GEJ153 15K S R403 ERJ2GE0R00 0 R404 ERJ2GEJ153 15K S R405 D0GA823JA004 82K R406 ERJ2GEYJ103 10K S R407 ERJ2GEJ220 22 S R408 ERJ2GE0R00 0 R409 ERJ2GEJ331 330 S R410 ERJ2GEYJ102 1K S Ref No ...

Page 61: ...RJ6GEYJ1R0 1 R603 ERJ6GEYJ1R0 1 R610 ERJ3GEYJ272 2 7K R610 ERJ3GEYJ272 2 7K R612 D1BB4702A055 47K R613 D1BB4702A055 47K R614 ERJ3EKF1001 1K S R615 ERJ3EKF1001 1K S R616 ERJ6ENF1R00 1 S R617 ERJ6ENF1R00 1 S R618 ERJ6ENF1R00 1 S R619 ERJ6ENF1R00 1 S Ref No Part No Part Name Description Remarks A201 KX TCA1 2 AC ADAPTOR A202 PSKE1093Z1 HANGER BELT CLIP PC ABS HB A203 PSQX3990YCD CD ROM INSTRUCTION BO...

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