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Panasonic KX-TC1503B Service Manual

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ORDER NO. KM40106816C7
F11
Telephone Equipment
KX-TC1503B / KX-TC1503W
900MHz Digital Cordless Answering System
Black Version
White Version
(for U.S.A.)
(for Panama)
SPECIFICATIONS
2001 Kyushu Matsushita Electric Co., Ltd. All rights reserved.
Unauthorized copying and distribution is a violation of law.

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Summary of Contents for Panasonic KX-TC1503B

  • Page 1 ORDER NO. KM40106816C7 Telephone Equipment KX-TC1503B / KX-TC1503W 900MHz Digital Cordless Answering System Black Version White Version (for U.S.A.) (for Panama) SPECIFICATIONS 2001 Kyushu Matsushita Electric Co., Ltd. All rights reserved. Unauthorized copying and distribution is a violation of law.
  • Page 2 1. STANDARD BATTERY LIFE Battery Charge Place the headset on the base unit and charge the battery for about 15 hours before initial use. - The IN USE/CHARGE/HOLD indicator lights. Recharge When the RECHARGE indicator flashes, or the unit beeps intermittently, recharge the battery for about 15 hours.
  • Page 3 2. LOCATION OF CONTROLS 2.1. Base unit...
  • Page 5 2.2. Handset 3. DISPLAY 3.1. Base Unit Display...
  • Page 6 4. CONNECTIONS...
  • Page 7 Note: - USE ONLY WITH Panasonic AC ADAPTOR KX-TCA1-G. - The AC adaptor must remain connected at all times. (It is normal for the adaptor to feel warm during use.) 4.1. Adding Another Phone This unit will not function during a power failure. To connect a standard telephone on the same...
  • Page 8 Panasonic T-adaptor KX-J66. 5. OPERATION 5.1. Making Calls...
  • Page 10 5.2. Answering Calls...
  • Page 11 5.3. Automatic Answering Operation 5.3.1. Setting the Unit to Answer Calls...
  • Page 12 5.4. Listening to Messages...
  • Page 13 5.4.1. During playback...
  • Page 14 5.5. FLASH Button...
  • Page 15 6. DISASSEMBLY INSTRUCTIONS...
  • Page 17 Shown in Fig.- To Remove Remove Lower Cabinet Screws (2.6 X 12)..(A) X 5 Main P.C. Board Remove the P.C. Board Antenna Screw (2.6 X 12)..(B) X 1 Speaker Screws (3 X 8)..(C) X 3 Battery Cover Remove the Battery Cover Rear Cabinet Screws (2.6 X 12)..(D) X 2 Rear Cabinet...
  • Page 18 7. TROUBLESHOOTING GUIDE Cross Reference: Check Power Error Message Table Check Record Check Playback Check Battery Charge Check Link Check the RF Unit Check Handset Transmission Check Handset Reception 7.1. Check Power...
  • Page 19 Cross Reference: Power Supply Circuit Reset Circuit NOTE: Flash Memory is IC300. DSP is IC201. 7.2. Error Message Table NOTE: Flash Memory is IC300. DSP is IC201.
  • Page 20 7.3. Check Record Cross Reference: Telephone Line Interface Auto Disconnect Circuit Parallel Connection Detect Circuit Signal Route NOTE: Flash Memory is IC300. DSP is IC201. 7.4. Check Playback...
  • Page 21 Cross Reference: Power Supply Circuit NOTE: Flash Memory is IC300. DSP is IC201. 7.5. Check Battery Charge...
  • Page 22 NOTE: Flash Memory is IC300. DSP is IC201. 7.6. Check Link (*1) Refer to Finding out the Defective Unit Cross Reference: Check the RF Unit Power Supply Circuit Power Supply Circuit NOTE: Flash Memory is IC300. DSP is IC201.
  • Page 23 7.7. Check the RF Unit 7.7.1. Finding out the Defective Unit Prepare HS JIG (Handset-jig) and BS JIG (Base Unit-jig) 2). Place the HS JIG on the cradle of the base unit for checking, then confirm that they are linked. Place the handset for checking on the cradle of the BS JIG, then confirm that they are linked.
  • Page 24 Fig. Using TC1703 Handset-jig. * KX-TC1703 is used as the jig. 7.7.2.2. Base Unit - jig (BS JIG) for Handset The base unit jig uses two modes: NORMAL POWER mode and TEST POWER mode. (1) NORMAL POWER mode. This test simulates the handset is at normal/close distance. The base unit is in NORMAL POWER mode right after the AC adapter has been inserted.
  • Page 25 NOTES: 1) If when setting the base to TEST LOW mode, if handset beeps 3 times, press 2, 5, 8, 0 simultaneously and then disconnect battery. Re-install battery, place unit on cradle to get security codes and tries again. 2) Only KX-TC1703 with marks BS JIG/HS JIG can be used for troubleshooting. However, regular production set also can be used as a JIG.
  • Page 26 : Details of confirmation items are following in “Check Table for RF Block ()”. NOTE: Flash Memory is IC300. DSP is IC201. 7.7.4. Check Table for RF Block...
  • Page 27 Item BS (Base unit) (*1) HS (Handset) (*1) 1. Put “HS JIG” on BS. 1. Put HS on “BS JIG”. 1a. Link Procedure 2. Set MODE to [NORMAL POWER] position of 2. Set MODE to [NORMAL POWER] position confirmation “HS JIG“. “BS JIG“.
  • Page 28 NOTE: Flash Memory is IC300. DSP is IC201. 7.7.5. RF-DSP interface signal wave form...
  • Page 29 7.8. Check Handset Transmission Cross Reference: Signal Route 7.9. Check Handset Reception Cross Reference: Signal Route NOTE: When checking the RF UNIT, Refer to Check the RF Unit 8. TEST MODE 8.1. Test mode flow chart for Base Unit...
  • Page 30 (*1) See Base Unit Reference Drawing () - Should return to OPEN after entering the Test mode. (*2) It shows whether the telephone line is connected or not. -ON: OFF HOOK. -OFF: ON HOOK 8.2. TAM Test mode flow chart...
  • Page 31 8.3. Test mode flow chart for Handset...
  • Page 32 (*1) See Handset Reference Drawing ( ).---Should return to OPEN after entering the Test mode. 8.4. X101 Check The confirmation is made under the Continuous Send mode of TEST MODE. Equipment: Frequency counter TP for adjustment: TP_ANT Measure range: 902.713 MHz ± 5 kHz (1ch) at Test Standby mode in TEST MODE 8.5.
  • Page 33 8.7. FREQUENCY TABLE 9. DESCRIPTION 9.1. Frequency The frequency range of 902.713 MHz ~ 927.289 MHz is used. Transmitting and receiving channel between base unit and handset is same frequency. Refer to the Frequency Table. 9.2. Time Division Duplex (TDD) operation Transmission/reception between the base unit and handset is performed by time-sharing as shown in Fig.
  • Page 34 Each subframe consists of the following four fields: - A 2-bit Preamble field - An 8-bit Data Channel field - An 16-bit Sync Word - A 72-bit ADPCM Payload (CRC 8-bit) 9.3. Signal Flowchart in the Whole System Reception CN1 of the base unit is connected to the TEL line, and the signal is input through the bridge diode D4.
  • Page 35 10. EXPLANATION OF BBIC (Base Band IC) DATA COMMUNICATION 10.1. Calling...
  • Page 36 10.2. To Terminate Communication 10.3. Ringing...
  • Page 37 10.4. Ports for Transmitting and Receiving of Data 11. BLOCK DIAGRAM (Base Unit) 12. CIRCUIT OPERATION (Base Unit) General Description: (DSP, Flash Memory) is a digital speakerphone/speech/signal processing system that implements all the functions of speech compression, record and playback, and memory management required in a digital telephone answering machine.
  • Page 38 The DTMF detection is implemented by the DSP system in software. The DTMF detection is performed during Record, Playback, and Line Monitoring modes of operation. When the DTMF data from the Handset is received, the DTMF signal is output. - Synthesized Voice (Pre-recorded message) The DSP implements synthesized Voice, utilizing the built in speech detector and an FLASH MEMORY, which stored the vocabulary.
  • Page 39 12.3.1. Charge Circuit The voltage from the AC is supplied to the main charge circuits. Normal charge (70 mA) of maximum 20-hours is started soon after the Handset is placed on the base unit. Then it changes to trickle charge (15 mA on the average) to prevent from overcharging. Normal charge: Q150 is ON Trickle charge: Q150 is OFF 12.4.
  • Page 40 12.5. Locator/Intercom Mode 1. When the base unit LOCATOR/INTERCOM button is pressed, a call monitor signal (intercom sound) is output from pins 29 and 31 of IC201. Thus a monitor tone is heard from the speaker. 2. At the same time, flashing of the IN USE/CHARGE (LED202) is obtained from pin 70 of IC201.
  • Page 41 Telephone Line Interface Circuit: Function - Bell signal detection - ON/OFF hook and pulse dial circuit - Side tone circuit - Auto-disconnect circuit/Parallel connection detection circuit Bell signal detection and OFF HOOK circuit: In the idle mode, Q4 is open to cut the DC loop current and decrease the ring load. When ring voltage appears at the Tip (T) and Ring (R) leads (When the telephone rings), the AC ring voltage is transferred as follows: DSP pin 27.
  • Page 42 12.7. Auto Disconnect Circuit Function: This circuit is used to detect the fact that another telephone connected to the same line is OFF- HOOK while the unit is in a receiving status or OGM transmitting status. Circuit Operation: The voltage DCIN of DSP is monitored. If a parallel-connected telephone is put into an OFF HOOK status, the presence/absence of a parallel connection is determined when the voltage changes by 0.2V or more.
  • Page 43 12.9. Signal Route Each signal route is as follows.
  • Page 44 13. BLOCK DIAGRAM (Handset) 14. CIRCUIT OPERATION (Handset) 14.1. Construction The circuit mainly consists of DSP and RF unit as shown in the block diagram. 14.1.1. DSP:IC201 Function - Battery Low, Power down defect circuit - Ringer Generation - Interface circuit RF unit, speaker, mic, LED, Key scan, Headset 14.1.2.
  • Page 45 Mainly voice signal is modulated to RF, or it goes the other way. 14.1.3. EEPROM: IC201 All setting data is stored. ex: ID code, user setting (Flash Time, Tone/Pulse) 14.2. Power Supply Circuit Voltage is supplied separately to each block as shown the Block Diagram below. 14.3.
  • Page 46 14.5. Sending Signal The voice signal from the microphone input to DSP (46-47). CN203 is the headset jack. When the headset is connected, the Q206 detect it. The input from the microphone of the handset (MIN, MIP) is cut and the microphone signal from the headphone is input to DSP (36). Also the power for the microphone is supplied from Q211, and the power is turned OFF on standby.
  • Page 47 15. CPU DATA (Base Unit) 15.1. IC201...
  • Page 48 16. CPU DATA (Handset) 16.1. IC201...
  • Page 49 17. EXPLANATION OF IC TERMINALS (RF Unit) 17.1. IC101...
  • Page 51 18. HOW TO REPLACE FLAT PACKAGE IC 18.1. Preparation - SOLDER Sparkle Solder 115A-1, 115B-1 or Almit Solder KR-19, KR-19RMA - Soldering iron Recommended power consumption will be between 30 W to 40 W. Temperature of Copper Rod 662 ± 50°F (350 ± 10°C) (An expert may handle between 60 W to 80 W iron, but beginner might damage foil by overheating.) - Flux...
  • Page 52 3. Solder employing specified solder to direction of arrow, as sliding the soldering iron. 18.3. Modification Procedure of Bridge 1. Re-solder slightly on bridged portion. 2. Remove remained solder along pins employing soldering iron as shown in below figure. 19. CABINET AND ELECTRICAL PARTS (Base Unit)
  • Page 53 20. CABINET AND ELECTRICAL PARTS (Handset)
  • Page 54 21. ACCESSORIES AND PACKING MATERIALS...
  • Page 55 22. TERMINAL GUIDE OF IC'S, TRANSISTORS AND DIODES 22.1. Base Unit 22.2. Handset...
  • Page 56 23. REPLACEMENT PARTS LIST This replacement parts list are U.S.A. version only. Note: 1. RTL (Retention Time Limited) The marking (RTL) indicates that the Retention Time is limited for this item. After the discontinuation of this assembly in production, the item will continue to be available for a specific period of time.
  • Page 57 PQQT22304Z TAM LABEL PQSA10095Z ANTENNA (for KX-TC1503B) PQSA10095Y ANTENNA (for KX-TC1503W) PQSX10173Z TAM KEY RUBER SWITCH (for KX-TC1503B) PQSX10173Y TAM KEY RUBER SWITCH (for KX-TC1503W) PQSX10179Z FUNCTION KEY RUBBER SWITCH (for KX-TC1503B) PQSX10179Y FUNCTION KEY RUBBER SWITCH (for KX-TC1503W) PQUS10285Z...
  • Page 58 Ref. No. Part No. Part Name & Description Remarks PCB1 PQWPTC1503BH MAIN P.C.BAORD ASS'Y (RTL) (ICS) IC100 C0CBABD00013 IC201 C2HBBG000011 IC300 PQWITC1503BH IC331 PQVIPS3432UT IC332 C0EBE0000142 (TRANSISTORS) 2SC2120 TRANSISTOR(SI) PQVT2N6517CA TRANSISTOR(SI) 2SA1625 TRANSISTOR(SI) UN5213 TRANSISTOR(SI) 2SD1819A TRANSISTOR(SI) 2SD1819A TRANSISTOR(SI) 2SD1819A TRANSISTOR(SI) Q102 2SD1819A...
  • Page 59 Ref. No. Part No. Part Name & Description Remarks G403 PQJT10152Z CHARGE TERMINAL G404 PQJT10152Z CHARGE TERMINAL G405 PQJT10152Z CHARGE TERMINAL G406 PQJT10152Z CHARGE TERMINAL POS1 PQRPAR390N POSISTOR RA200 EXRV8V104JV RESISTOR ARRAY X200 H0D409400014 CRYSTAL OSCILLATOR (RESISTORS) ERJ3GEYJ122 1.2k ERJ3GEYJ681 ERJ3GEYJ470 ERDS1TJ330 ERJ3GEYJ393...
  • Page 60 Ref. No. Part No. Part Name & Description Remarks R203 ERJ3GEYJ473 R204 ERJ3GEYJ391 R206 ERJ3GEYJ181 R212 ERJ3GEYJ102 R213 ERJ3GEYJ102 R214 ERJ3GEYJ102 R215 ERJ3GEYJ222 2.2k R216 ERJ3GEYJ222 2.2k R219 ERJ3GEYJ103 R222 ERJ3GEYJ333 R223 ERJ3GEYJ222 2.2k R225 ERJ3GEYJ102 R227 ERJ3GEYJ222 2.2k R228 ERJ3GEYJ473 R229 ERJ3GEYJ473...
  • Page 61 Ref. No. Part No. Part Name & Description Remarks C103 ECEA0JU102 1000 C105 PQCUV1C334KB 0.33 C106 ECUV1C104ZFV C107 ECEV0JA220 C108 ECEV0JA101 C109 ECUV1H103KBV 0.01 C110 ECUV1C104ZFV C112 ECEA1AKA101 C114 ECEA1CKS220 C150 ECUV1C104ZFV C200 ECUV1C104ZFV C201 ECUV1H681JCV 680P C207 ECUV1C104ZFV C213 ECUV1C104ZFV C227 ECUV1H180JCV...
  • Page 62 PQHR10778Z SP HOLDER PQHR10855Z SP HOLDER PQHR10865Z LED LENSE PQHS10457Z SP NET PQP504SVC BATTERY PQSX10174Y KEY RUBBER SWITCH (KX-TC1503B) PQSX10174W KEY RUBBER SWITCH (KX-TC1503W) PQJT10176Z CHARGE TERMINAL (L) PQJT10177Z CHARGE TERMINAL (R) PQKE10132Z1 EARPHONE CAP PQKM10486Y1 FRONT CABINET (KX-TC1503B) 1AKM10486Y4...
  • Page 63 Ref. No. Part No. Part Name & Description Remarks PCB100 PQWPTC1503BR MAIN P.C.BOARD ASS'Y (RTL) (ICS) IC201 C2HBBG000014 IC202 PQWITC1503BR IC203 C0CBABD00011 IC204 PQVIC62FP33M IC205 PQVIC61CN32N (TRANSISTORS) Q205 2SD1819A TRANSISTOR(SI) Q206 PQVTDTC143E TRANSISTOR(SI) Q207 2SD1819A TRANSISTOR(SI) Q211 PQVTDTA143TU TRANSISTOR(SI) (DIODES) D201 MA2ZD1400 DIODE(SI)
  • Page 64 Ref. No. Part No. Part Name & Description Remarks R229 ERJ3GEYJ102 R230 ERJ3GEYJ102 R231 ERJ3GEYJ102 R232 ERJ3GEYJ103 R233 ERJ3GEY0R00 R234 ERJ3GEYJ225 2.2M R235 ERJ3GEYJ225 2.2M R236 ERJ3GEYJ473 R241 ERJ3GEY0R00 R244 ERJ3GEYJ473 R245 ERJ3GEYJ103 R246 ERJ3GEYJ153 R247 ERJ3GEYJ391 R248 ERJ3GEYJ393 R249 ERJ3GEYJ222 2.2k R250...
  • Page 65 KX-TCA1-G AC ADAPTOR PQJA10075Z TEL CORD PQKE10130Z1 BELT CLIP (KX-TC1503B) PQKE10130Z2 BELT CLIP (KX-TC1503W) PQKL10035Z1 WALL MOUNT ADAPTOR (KX-TC1503B) S PQKL10035Z2 WALL MOUNT ADAPTOR (KX-TC1503W) S PQQW12431Z QUICK GUIDE (for English) PQQW12432Z QUICK GUIDE (for Spanish) PQQX13049Z INSTRUCTION BOOK PQPP170Y...
  • Page 66 2. The schematic diagrams and circuit board may be modified at any time with the development of new technology. 24.2. Handset (SCHEMATIC DIAGRAM (Handset)) Notes: 1. DC voltage measurements are taken with an oscilloscope or a tester with a ground. 2.
  • Page 67 (COMPONENT VIEW) ANT GND TEST...
  • Page 68 (FLOW SOLDER SIDE VIEW) Line A Line B...
  • Page 70 Key matrex LOUTO HSMIP Key Scan VMOD LCD CON MODEN IC331 OSCIN (BMCCLK) IC201 DATA IC332 Q108 IC100 3.6V RXEN TXEN Q104 RADIO EN 3.2V SHCTRL RSSI RXDATA (RXI) Q151 IC300 Q150...
  • Page 71 IC102 IC101...
  • Page 72 IC202 IC300 IC201...
  • Page 73 Input 1.1kHz 140mVp-p (-25dBm/600 Output IC332 IC331 6.0V 3.3V 3.6V IC100 3.2V 9V DC. for H/S TALK TX TALK RX KX-TC1503B/W: SCHEMATIC DIAGRAM (Base Unit)
  • Page 74 Input 1.1kHz 140mVp-p (-25dBm/600 Output IC332 IC331 6.0V 3.3V 3.6V IC100 3.2V 9V DC. for H/S TALK TX TALK RX KX-TC1503B/W: SCHEMATIC DIAGRAM (Base Unit)
  • Page 75 IC202...
  • Page 76 Input 1.1kHz 18mVp-p (-45dBm/600 ) (Headset) 6.3V/22µ (Headset) Input 1.1kHz IC201 -43dBm/600 IC205 3.3V IC203 3.3V IC204 KX-TC1503B/W : SCHEMATIC DIAGRAM (Handset)
  • Page 77 Input 1.1kHz 18mVp-p (-45dBm/600 ) (Headset) 6.3V/22µ (Headset) Input 1.1kHz IC201 -43dBm/600 IC205 3.3V IC203 3.3V IC204 KX-TC1503B/W : SCHEMATIC DIAGRAM (Handset)
  • Page 78 IC101...
  • Page 79 Vcc (3.2V) Vcc (3.3V) HS MIP Louto Bell CHARGE-CTL Vcc (3.3V) IC201 X200 3 4 5 LINO X'tal CLK Reset: RST Power-Down: PDN Mic input...
  • Page 81 IC201 IC202 3 4 5...
  • Page 83 Please file and use this supplement manual together with the service manual mentioned below. CONTENTS Page Page 1 CHANGES 2 SUP-1 (KM40108802S7) 1.1. REPLACEMENT PARTS LIST © 2007 Panasonic Communications Co., Ltd. All rights reserved. Unauthorized copying distribution is a violation of law.
  • Page 84 KX-TC1503B / KX-TC1503W 1 CHANGES 1.1. REPLACEMENT PARTS LIST 1.1.1. REFERENCE CHART 1.1.2. ORIGINAL AND NEW PARTS COMPARISON LISTS (for KX-TC1503B/KX-TC1503W) Ref. No. Part No. Part Name & Description Pcs/ Remarks Notes Time of Change Original (Old) (Suffix) KX-TCA1-G KX-TCA1-3...
  • Page 85 900MHz Digital Cordless Answering System Black Version (for U.S.A.) (for Panama) Please file and use this supplement manual together with the service manual for Model No. KX-TC1503B, Order No.KM40106816C7. © 2001 Kyushu Matsushita Electric Co., Ltd. All rights reserved. Unauthorized copying distribution is a violation of law.
  • Page 86 KX-TC1503B / KX-TC1503W KX-TC1503B 1 CHANGES This supplement has been issued for changes of the parts No. of CPU and electrical parts, etc. 1.1. REPLACEMENT PARTS LIST Ref. No. Part No. Part Name & Description Pcs/ Implementation Suffix Notes Original (Old)

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