Panasonic KX-TES824LA Service Manual
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Panasonic KX-TES824LA Service Manual

Advanced hybrid system
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IMPORTANT INFORMATION ABOUT LEAD FREE, (PbF), SOLDERING
If lead free solder was used in the manufacture of this product the printed circuit boards will be marked PbF.
Standard leaded, (Pb), solder can be used as usual on boards without the PbF mark.
When this mark does appear, please read and follow the special instructions described in this manual on the use of PbF and how
it might be permissible to use Pb solder during service and repair work.
Advanced Hybrid System
KX-TES824LA
KX-TEM824LA
KX-TE82461X
KX-TE82474X
KX-TE82480X
KX-TE82483X
KX-TE82491X
KX-TE82492X
KX-TE82493X
KX-A227X
(for Latin America)
© 2005 Panasonic Communications Co., Ltd. All
rights
reserved.
distribution is a violation of law.
ORDER NO. KMS0502047C3
Unauthorized
copying
and

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Summary of Contents for Panasonic KX-TES824LA

  • Page 1 When this mark does appear, please read and follow the special instructions described in this manual on the use of PbF and how it might be permissible to use Pb solder during service and repair work. © 2005 Panasonic Communications Co., Ltd. All rights reserved.

  • Page 2: Table Of Contents

    2 FOR SERVICE TECHNICIANS 12.1. NO OPERATION (Check POWER SUPPLY BOARD, 3 CAUTION MAIN BOARD) 3.1. SAFETY PRECAUTIONS 12.2. NO DIAL TONE (KX-TES824LA, MAIN BOARD OF KX- 3.2. INSULATION RESISTANCE TEST TEM824LA) 3.3. BATTERY CAUTION 12.3. CANNOT DIAL (KX-TES824LA, MAIN BOARD OF KX- 3.4.

  • Page 3: Troubleshooting Guide

    25.9. CABINET AND ELECTRICAL PARTS 21.6. SUB 25.10. ACCESSORIES AND PACKING MATERIALS 21.7. POWER SUPPLY 25.11. REPLACEMENT PARTS LIST (KX-TE82480X) 22 PRINTED CIRCUIT BOARD (KX-TES824LA/KX-TEM824LA) 114 25.12. FOR THE SCHEMATIC DIAGRAM 22.1. MAIN BOARD 25.13. SCHEMATIC DIAGRAM (KX-TE82480X) 22.2. SUB BOARD 25.14.
  • Page 4 KX-TES824LA / KX-TEM824LA / 28.5. TROUBLESHOOTING GUIDE 29.4. CIRCUIT OPERATIONS 28.6. IC DATA 29.5. TROUBLESHOOTING GUIDE 28.7. TERMINAL GUIDE OF ICS, TRANSISTORS AND 29.6. IC DATA DIODES 29.7. TERMINAL GUIDE OF ICS, TRANSISTORS AND 28.8. ACCESSORIES AND PACKING MATERIALS DIODES 28.9.

  • Page 5: About Lead Free Solder (Pbf: Pb Free)

    KX-TES824LA / KX-TEM824LA / 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 6: How To Recognize That Pb Free Solder Is Used

    KX-TES824LA / KX-TEM824LA / 1.2. HOW TO RECOGNIZE THAT Pb FREE SOLDER IS USED...

  • Page 7: For Service Technicians

    KX-TES824LA / KX-TEM824LA / 2 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 8: Caution

    KX-TES824LA / KX-TEM824LA / 3 CAUTION 3.1. SAFETY PRECAUTIONS 1. Before servicing, unplug the power cord to prevent an electric shock. 2. When replacing parts, use only the manufacturer´s recommended components for safety. 3. Check the condition of the power cord. Replace if wear or damage is evident.

  • Page 9: Specifications

    KX-TES824LA / KX-TEM824LA / 4 SPECIFICATIONS 4.1. GENERAL DESCRIPTION Control Bus Original bus (16-bit, 24 MHz) Switching Space Division CMOS Crosspoint Switch Power Input 100 V AC to 240 V AC, 1.5A to 0.75A, 50 Hz/60Hz External Battery +24 V DC (+12 V DC x 2)

  • Page 10: System Overview

    KX-TES824LA / KX-TEM824LA / 4.3.2. Maximum Cards Terminal Equipment ltem KX-TES824 KX-TEM824 Extension Terminal 3-Port Analogue CO Line and 8-Port Hybrid Extension Card 2-Port Analogue CO Line and 8-Port Single Line Telephone Extension Card 8-Port Single Line Telephone Extension Card...

  • Page 11: System Connection Diagram

    KX-TES824LA / KX-TEM824LA / 5.2. SYSTEM CONNECTION DIAGRAM • • • • Connect a display-equipped proprietary telephone (PT) to extension jack 01, as this extension is automatically designated as the manager extension.

  • Page 12: Names And Locations

    KX-TES824LA / KX-TEM824LA / 6 NAMES AND LOCATIONS 7 CONNECTION 7.1. SERIAL INTERFACE CONNECTION...

  • Page 13: Disassembly Instructions

    KX-TES824LA / KX-TEM824LA / 8 DISASSEMBLY INSTRUCTIONS 8.1. DISASSEMBLY INSTRUCTION 1. Loosen the top cover screw (A). 2. Remove the top front cover. Note The screw cannot be removed front the cover. 3. Remove the 2 bottom-cover screws (B). 4. Open the bottom front cover.
  • Page 14 KX-TES824LA / KX-TEM824LA / 5. Remove the 2 screws (A). 6. Remove the power supply board cover. 7. Pull out the 4 connectors. 8. Remove the 1 screw (D). 9. Remove the power supply board. 10. Pull out the 1 connector.
  • Page 15 KX-TES824LA / KX-TEM824LA / Procedure: • • • • Insert the SW CABLE into AC POWER SWICH. Caution: • • • • Be sure each colored wire is inserted to the correct lug (very important).

  • Page 16: Block Diagram

    KX-TES824LA / KX-TEM824LA / 9 BLOCK DIAGRAM 9.1. SYSTEM BLOCK DIAGRAM DOOR2 DOOR1 Ext Paging Ext Music Tone...

  • Page 17: Power Block Diagram

    KX-TES824LA / KX-TEM824LA / 9.2. POWER BLOCK DIAGRAM 9.3. KX-TES824LA/KX-TEM824LA 1AP BLOCK DIAGRAM CO CID (I/O) CONNECTOR ASIC CN706 DTMF Generator Door Phone CROSS CO1-3 Door Opener DOOR1, 2 POINT CONNECTOR CN601 PAGE Paging jack CN708 CN600 TAM1-2, TONE MOH jack...

  • Page 18: Kx-Tem824La 2Ap Block Diagram

    (APT i/f)PRX2,PTX2,PTXE1-3 IC500, IC501, IC502 CN501, CN502 EXT11 EXT12 EXT13 EXT14 EXT15 EXT16 KX-TEM824LA 2AP BLOCK DIAGRAM 9.5. KX-TES824LA/KX-TEM824LA POWER SUPPLY UNIT BLOCK DIAGRAM Q503 Q503 RL501 RL501 +24V Battery D10~D13, C5 D101, C101 Back up AC IN Primary Circuit...

  • Page 19: Explanation Of Block Diagram

    KX-TES824LA / KX-TEM824LA / 10 EXPLANATION OF BLOCK DIAGRAM 10.1. MAIN UNIT (KX-TES824LA/KX-TEM824LA) 10.1.1. Power Supply Circuit This power supply unit is a switching power supply. Power supply unit supplies DC voltage (+27V,+15V,-15V,3.3V) to main board and other optional cards. And this unit has an adaptor circuit to back up battery. And this unit amplified the BELL signal (20/25Hz sign wave outputted from the ASIC) and supply bell signal to the telephone.
  • Page 20 KX-TES824LA / KX-TEM824LA / 10.1.13. USB Circuit The circuit which makes communication possible by PC and 1.1 standards by the USB controller in ASIC. 10.1.14. OGM Circuit 4M connected to ASIC by the memory controller in ASIC A maximum of 3-minute storing of OGM is possible to a serial flash Circuit.

  • Page 21: Circuit Operation

    KX-TES824LA / KX-TEM824LA / 11 CIRCUIT OPERATION 11.1. POWER SUPPY CIRCUIT 11.1.1. The function of the power unit are listed below AC-DC Inverter Function This function isolates and transduces the AC input voltage to DC input and output of DC27V.
  • Page 22 KX-TES824LA / KX-TEM824LA / 11.1.2. Control Section 1) AC-DC Inverter Function The AC input voltage is rectified and smoothed by D10-13 and C5. The obtained DC voltage is converted into a rectangular wave by the switching transistor Q1, then isolated and transduced by T1. This converted rectangular wave is rectified and smoothed by D101 and C101 to output DC27V.

  • Page 23: Co Interface Circuit

    KX-TES824LA / KX-TEM824LA / 11.2. CO INTERFACE CIRCUIT 11.2.1. Composition This is composed of the following circuit: 1) Bell signal detection 2) DC loop formation circuit 3) Pulse dial transmission circuit 4) CALL ID interface circuit 5) COL bidirectional amplifier circuit 1) Bell signal detection When CO line is idle, photo coupler PC1, PC2 are OFF.
  • Page 24 KX-TES824LA / KX-TEM824LA / 2) DC loop formation circuit In the off hook status, PC5 is ON. DC loop path: Tip→L1→D1→D2→D3→Q10(E-C)→Q1(C-E)→R9→R8→D3→L1→Ring At this time, the output of the photo coupler PC1 changes level from High to low. Ring→L1→D3→R8→R9→Q1(E-C)→Q10(C-E)→D3→D2→D1→L1→Tip At this time, the output of the photo coupler PC2 changes level from High to low.
  • Page 25 KX-TES824LA / KX-TEM824LA / 4) CALL ID interface circuit It is insulated by the transformer in a COL circuit, and the call ID signal inputted from outside line is transmitted to a CALLID option card. The flow of a CALLID signal Tip→L1→R2→PC1(1-2)→C3→T2→R5→L1→Ring...
  • Page 26 KX-TES824LA / KX-TEM824LA / 1) Conference switch Normally, pin 6 of the analog switch IC2 is low level, but during conferences, this pin becomes high level. Because, during conferences, it should compensate the return loss by connecting the balance network BN2 and the balance network BN3 in parallel.

  • Page 27: Cross Point Switch Circuit

    KX-TES824LA / KX-TEM824LA / 11.3. CROSS POINT SWITCH CIRCUIT 11.3.1. Composition The cross point circuit composed of three cross point switch IC´s (IC600 and 601:8X16, IC602:4X8). *In case of KX-TEM824, the system add more cross point switch IC´s (IC500:8X16, IC501:8X8, IC502:4X8) which are in KX- TE82483.
  • Page 28 KX-TES824LA / KX-TEM824LA /...

  • Page 29: Intercom Circuit

    KX-TES824LA / KX-TEM824LA / 11.4. INTERCOM CIRCUIT 11.4.1. INTERCOM CIRCUIT 1) Composition This is composed of the following circuits: a) +15V power source for the extension telephones b) Hook detect for SLT and pulse dialing detect c) Bell ring trip section...

  • Page 30: Power Failure Through Call Switching Circuit

    KX-TES824LA / KX-TEM824LA / 11.5. POWER FAILURE THROUGH CALL SWITCHING CIRCUIT 11.5.1. Circuit operation If an AC power failure lasts longer than one second (momentary power failure), the COL is directly connected to the extension. The COL1 will be connected with EXT101.

  • Page 31: Data Communication Circuit

    KX-TES824LA / KX-TEM824LA / 11.6. DATA COMMUNICATION CIRCUIT 11.6.1. Composition This circuit is composed of the ASIC and the data communication interface circuits for the ICM circuit. 11.6.2. Circuit Operation 1) Data Communication of ASIC The APT I/f module is built into the CPU. It is for the APT communication of one block (8ch) and has the module of three blocks (24ch) at maximum.
  • Page 32 KX-TES824LA / KX-TEM824LA / 2) Data Communication of ASIC and PITS When ASIC send the request signal to the proprietary telephone and after receiving the key input information (19 pulses) from the proprietary telephone and sending data (47 pulses) for LED control. 4bit CPU will receive acknowledge signal from the proprietary telephone.

  • Page 33: Control Circuit

    KX-TES824LA / KX-TEM824LA / 11.7. CONTROL CIRCUIT 11.7.1. Composition The control block is composed of the 16bit CPU(IC700: operating on 23.966MHz system clock from the 47.936MHz external crystal oscillator), the 8Mbit Flash ROM, the 4Mbit SRAM, and the ASIC for the I/O Port to control the outside line.

  • Page 34: Tone Generator Circuit

    KX-TES824LA / KX-TEM824LA / 11.8. TONE GENERATOR CIRCUIT 11.8.1. Composition This system has three different tones, 620Hz, 440Hz, 350Hz. ASIC make the 350Hz, 620Hz and 440Hz square wave signals. The 350Hz and 440Hz square wave signals are shaped by the low pass filter to sin wave and become tone 1.

  • Page 35: Dtmf Generator Circuit

    KX-TES824LA / KX-TEM824LA / 11.9. DTMF GENERATOR CIRCUIT 11.9.1. Composition DTMF generator is controlled by the 8 bit I/O data of CO G/A. DTMF tone is sent to CO line. DTMF GENERATOR TRANSMIT SIGNAL DISABLE...

  • Page 36: Dtmf Receiver Circuit

    KX-TES824LA / KX-TEM824LA / 11.10. DTMF RECEIVER CIRCUIT 11.10.1. Composition The DTMF receiver circuit is composes of four DTMF receivers. IC613 and IC614 are used for the DTMF receivers from SLT connected to the extension. The DTMF signal is the 4bit parallel data and read by ASIC.

  • Page 37: Int Callid Interface Circuit

    KX-TES824LA / KX-TEM824LA / 11.11. INT CALLID INTERFACE CIRCUIT By using the DSP built into the ASIC, it is possible to produce CALLID signal and send it through the cross point to each extension. The CALLID signal can be switched between FSK and DTMF. There are three sources of the extension CALL ID in the system.

  • Page 38: Usb Interface Circuit

    KX-TES824LA / KX-TEM824LA / 11.13. USB INTERFACE CIRCUIT This unit have one USB port for using PC programming. ASIC have USB 1.1 controller inside, so this unit make up USB interface only ASIC and USB connector. 11.14. OGM INTERFACE CIRCUIT The TES/TEM824 model incorporates the functions of OGM, CNG and DTMF detection.

  • Page 39: Ringing Signal Generator Circuit

    KX-TES824LA / KX-TEM824LA / 11.15. RINGING SIGNAL GENERATOR CIRCUIT This section generates this ringing signal for the single line telephone. A 25Hz square wave is generated by the ASIC and sent to low pass filter and ringing signal amplifier circuit and stepped by BELL transformer, and then passed through the ringing signal switching relay to the single line telephone.

  • Page 40: Doorphone Card Interface (Kx-Te82461X)

    KX-TES824LA / KX-TEM824LA / 11.17. DOORPHONE CARD INTERFACE (KX-TE82461X) This mounts a connector to connect the door phone card. Power at +15V, 3.3V and VAG are supplied to the door phone. Also, two busses are supplied from the cross point to the door phone card.

  • Page 41: Built In Voice Message Card Interface (Kx-Te82492X)

    KX-TES824LA / KX-TEM824LA / 11.19. BUILT in VOICE MESSAGE CARD INTERFACE (KX-TE82492X) The CN707 is the interface connector for the option card KX-TE82492 that has the MESSAGE of 2ch. The MESSAGE can be recorded from the external line or the extension. The recording time is 60 minutes for 1CH at maximum.

  • Page 42: Troubleshooting Guide

    KX-TES824LA / KX-TEM824LA / 12 TROUBLESHOOTING GUIDE 12.1. NO OPERATION (Check POWER SUPPLY BOARD, MAIN BOARD)

  • Page 43: Dial Tone (Kx-Tes824La, Main Board Of Kx-Tem824La)

    KX-TES824LA / KX-TEM824LA / 12.2. NO DIAL TONE (KX-TES824LA, MAIN BOARD OF KX-TEM824LA)

  • Page 44: Cannot Dial (Kx-Tes824La, Main Board Of Kx-Tem824La)

    KX-TES824LA / KX-TEM824LA / 12.3. CANNOT DIAL (KX-TES824LA, MAIN BOARD OF KX-TEM824LA)

  • Page 45: Cannot Call Extension (Kx-Tes824La, Main Board Of Kx-Tem824La)

    KX-TES824LA / KX-TEM824LA / 12.4. CANNOT CALL EXTENSION (KX-TES824LA, MAIN BOARD OF KX- TEM824LA) 12.5. CANNOT USE PROPRIETARY TELEPHONE (KX-TES824LA, MAIN BOARD OF KX-TEM824LA) 12.6. CANNOT RECEIVE INCOMING CALL (KX-TES824LA, MAIN BOARD OF KX-TEM824LA)

  • Page 46: Cannot Send Dtmf Dialing (Kx-Tes824La, Main Board Of Kx-Tem824La)

    KX-TES824LA / KX-TEM824LA / 12.7. CANNOT SEND DTMF DIALING (KX-TES824LA, MAIN BOARD OF KX- TEM824LA) 12.8. CANNOT RECEIVE CALL DIAL TONE (KX-TES824LA, MAIN BOARD OF KX-TEM824LA)

  • Page 47: Cannot Send A Hold On Music (Kx-Tes824La, Main Board Of Kx-Tem824La)

    KX-TES824LA / KX-TEM824LA / 12.9. CANNOT SEND A HOLD ON MUSIC (KX-TES824LA, MAIN BOARD OF KX-TEM824LA) 12.10. NO DIAL TONE (SUB BOARD OF KX-TEM824LA)

  • Page 48: Cannot Dial (Sub Board Of Kx-Tem824La)

    KX-TES824LA / KX-TEM824LA / 12.11. CANNOT DIAL (SUB BOARD OF KX-TEM824LA) 12.12. CANNOT CALL EXTENSION (SUB BOARD OF KX-TEM824LA)

  • Page 49: Cannot Use Proprietary Telephone (Sub Board Of Kx-Tem824La)

    KX-TES824LA / KX-TEM824LA / 12.13. CANNOT USE PROPRIETARY TELEPHONE (SUB BOARD OF KX- TEM824LA) 12.14. CANNOT RECEIVE INCOMING CALL (SUB BOARD OF KX-TEM824LA) 12.15. CANNOT SEND DTMF DIALING (SUB BOARD OF KX-TEM824LA)

  • Page 50: Cannot Receive Call Dial Tone (Sub Board Of Kx-Tem824La)

    KX-TES824LA / KX-TEM824LA / 12.16. CANNOT RECEIVE CALL DIAL TONE (SUB BOARD OF KX-TEM824LA) 12.17. CANNOT SEND A HOLD ON MUSIC (SUB BOARD OF KX-TEM824LA)

  • Page 51: Ic Data 13.1. Ic700

    KX-TES824LA / KX-TEM824LA / 13 IC DATA 13.1. IC700 PIN No Pin Name Function DTMF Rx Data[0] DTMF Rx Data[1] DTMF Rx Data[2] DTMF Rx Data[3] STD1 DTMF-R1 Status STD2 DTMF-R2 Status TOE1 DTMF-R1 Data output Enable TOE2 DTMF-R2 Data output Enable...
  • Page 52 KX-TES824LA / KX-TEM824LA / PIN No Pin Name Function MOH_SW External B6M Input BREAK Line 1.5V Disconnection, 0: Disconnected, 1: Connected IN232C Monitor Port for RS232C...

  • Page 53: Ic6

    KX-TES824LA / KX-TEM824LA / 13.2. IC6 PIN No Pin Name Function CDT1 Current Detect1 CDT2 Current Detect2 CDT3 Current Detect3 DET_DOOR Door Phone Card Detect NINT_AC AC Power-off Detection Signal NINT_DC DC Power-off Detection Signal OGM_SW Connected to the extension BLRLY BELL Disconnection;...
  • Page 54 KX-TES824LA / KX-TEM824LA / PIN No Pin Name Function Pulse Dial Dial Shunt SHUNT1 Receive Mute PAD1 3dB PAD BELLA1 Bell Detect A BELLB1 Bell Detect B DET_CID1 CID Card Detect(1AP) DET_CID2 CID Card Detect(2AP) DET_CID3 CID Card Detect(3AP) DET_TAM...

  • Page 55: Terminal Guide Of Ics, Transistors And Diodes

    KX-TES824LA / KX-TEM824LA / 14 TERMINAL GUIDE OF ICS, TRANSISTORS AND DIODES...

  • Page 56: How To Replace A Flat Package Ic

    KX-TES824LA / KX-TEM824LA / 15 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 soldering iron and a cutter knife, you can easily remove the ICs that have more than 100 pins.

  • Page 57: Fixtures And Tools

    KX-TES824LA / KX-TEM824LA / 16 FIXTURES AND TOOLS...

  • Page 58: Cabinet And Electrical Parts Location

    KX-TES824LA / KX-TEM824LA / 17 CABINET AND ELECTRICAL PARTS LOCATION...

  • Page 59: Accessories And Packing Materials

    KX-TES824LA / KX-TEM824LA / 18 ACCESSORIES AND PACKING MATERIALS...

  • Page 60: Replacement Parts List (Kx-Tes824La/Kx-Tem824La)

    KX-TES824LA / KX-TEM824LA / 19 REPLACEMENT PARTS Ref. Part No. Part Name & Description Remarks LIST (KX-TES824LA/KX- PSHR1146Z SPACER, LED PSHR1336Z SPACER, PCB HOLDER PA66 TEM824LA) PSJS02Q11Z CONNECTOR, 2P PSJS11P24Z CONNECTOR, 11P PSKE1020X1 COVER, POWER BOARD Note: PSKF1030S1 CABINET COVER (KX-TES824LA)
  • Page 61 KX-TES824LA / KX-TEM824LA / Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks IC610 PQVINJM4558V Q209 PQVTDTC143E TRANSISTOR(SI) IC611 PQVINJM4558V Q209A 2SD1819A TRANSISTOR(SI) IC612 PQVINJM4558V Q209B 2SD1819A TRANSISTOR(SI) IC613 C1CB00001876 Q209C 2SD1819A TRANSISTOR(SI)
  • Page 62 KX-TES824LA / KX-TEM824LA / Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks D204F MA8039 DIODE(SI) RA603 D1H81034A010 RESISTOR ARRAY, 10K D204G MA8039 DIODE(SI) RA700 D1H81034A010 RESISTOR ARRAY, 68 D204H MA8039 DIODE(SI) RA701...
  • Page 63 KX-TES824LA / KX-TEM824LA / Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks L716 PFVF1B221SB CERAMIC FILTER PC4A PQVIP27011M3 PHOTO COUPER L717 PFVF1B221SB CERAMIC FILTER PC4B PQVIP27011M3 PHOTO COUPER L718 PFVF1B221SB CERAMIC FILTER...
  • Page 64 KX-TES824LA / KX-TEM824LA / Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks C16B ECUV1H101JCV 100P C206B ECUV1C393KBV 0.039 C16C ECUV1H101JCV 100P C206C ECUV1C393KBV 0.039 C17A ECUV1H101JCV 100P C206D ECUV1C393KBV 0.039 C17B ECUV1H101JCV...
  • Page 65 KX-TES824LA / KX-TEM824LA / Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks C637 ECUV1C104KBV C729 ECUV1C104ZFV C640 ECUV1C105KB C730 PQCUV1A225ZF C641 ECUV1C105KB C731 ECUV1A105ZFV C642 ECUV1H471JCV 470P C732 ECUV1C104ZFV C643 ECUV1C105KB C733...
  • Page 66 KX-TES824LA / KX-TEM824LA / Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks C826 ECUV1H103KBV 0.01 C902 ECUV1H103KBV 0.01 C827 ECUV1H103KBV 0.01 C903 ECUV1H103KBV 0.01 C828 ECUV1H103KBV 0.01 C904 ECUV1H103KBV 0.01 C829 ECUV1H103KBV 0.01...
  • Page 67 KX-TES824LA / KX-TEM824LA / Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks ERJ1WYJ223 R31C ERJ3GEYJ304 300K ERJ1WYJ223 R34A ERJ3EKF1003 100K ERJ3GEYJ683 R34B ERJ3EKF1003 100K ERJ3GEYJ683 R34C ERJ3EKF1003 100K ERJ3GEYJ683 R35A ERJ3EKF1003 100K ERJ3GEYJ392 3.9K...
  • Page 68 KX-TES824LA / KX-TEM824LA / Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks R201F ERJ3GEYJ682 6.8K R210G ERJ3GEYJ333 R201G ERJ3GEYJ682 6.8K R210H ERJ3GEYJ333 R201H ERJ3GEYJ682 6.8K R211A ERJ3GEYJ123 R202A ERJ14YJ220 R211B ERJ3GEYJ123 R202B...
  • Page 69 KX-TES824LA / KX-TEM824LA / Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks R235 ERJ3GEYJ222 2.2K R587 ERJ3GEYJ152 1.5K R237 ERJ3GEYJ472 4.7K R588 ERJ3GEYJ473 R238 ERJ3GEYJ102 R589 ERJ3GEYJ473 R239 ERJ3GEYJ473 R590 ERJ3GEYJ473 R240...
  • Page 70 KX-TES824LA / KX-TEM824LA / Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks R738 ERJ6GEYJ515 5.1M D104 PSVDHZ30P DIODE(SI) R739 ERJ3GEYJ683 D111 PSVDHZS6 DIODE(SI) R740 ERJ3GEYJ683 D201 PSVDHZS33 DIODE(SI) R741 ERJ3GEYJ683 D202 PFVDERA9102...
  • Page 71 KX-TES824LA / KX-TEM824LA / Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks C101 PSCEA35ZL470 R204 ERJ3GEYJ222 2.2K C108 GRM426B224K5 0.22 R205 PQ4R10XJ153 C109 DEHR33A331 330P R206 ERX2SJR10 C110 GRM39B104K50 R207 ERX2SJR10 C151...
  • Page 72 KX-TES824LA / KX-TEM824LA / Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks IC511 C1CB00001876 U200B PSVTUMX1NTN TRANSISTOR(SI) (TRANSISTORS) U200C PSVTUMX1NTN TRANSISTOR(SI) 2SC4731S TRANSISTOR(SI) U200D PSVTUMX1NTN TRANSISTOR(SI) 2SC4731S TRANSISTOR(SI) U200E PSVTUMX1NTN TRANSISTOR(SI) 2SC4731S...
  • Page 73 KX-TES824LA / KX-TEM824LA / Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks DA200F MA142WKTX DIODE(SI) PC2A PQVIP27011M3 PHOTO COUPLER DA200G MA142WKTX DIODE(SI) PC2B PQVIP27011M3 PHOTO COUPLER DA200H MA142WKTX DIODE(SI) PC2C PQVIP27011M3 PHOTO COUPLER...
  • Page 74 KX-TES824LA / KX-TEM824LA / Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks C14C ECUV1C563KBV 0.056 C206A ECUV1C393KBV 0.039 C15A ECUV1C563KBV 0.056 C206B ECUV1C393KBV 0.039 C15B ECUV1C563KBV 0.056 C206C ECUV1C393KBV 0.039 C15C ECUV1C563KBV 0.056...
  • Page 75 KX-TES824LA / KX-TEM824LA / Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks C552 ECUV1H104ZFV ERJ3GEYJ683 C555 ECUV1H104ZFV PQ4R18XJ220 C556 ECUV1A105ZFV PQ4R18XJ220 C558 ECUV1H104ZFV PQ4R18XJ220 C801 ECUV1H103KBV 0.01 PQ4R10XJ681 C802 ECUV1H103KBV 0.01 PQ4R10XJ681...
  • Page 76 KX-TES824LA / KX-TEM824LA / Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks R29A ERJ3GEY0R00 R200H ERJ3GEYJ682 6.8K R29B ERJ3GEY0R00 R201A ERJ3GEYJ682 6.8K R29C ERJ3GEY0R00 R201B ERJ3GEYJ682 6.8K R30A ERJ3GEY0R00 R201C ERJ3GEYJ682 6.8K...
  • Page 77 KX-TES824LA / KX-TEM824LA / Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks R210A ERJ3GEYJ333 R226 ERJ3GEYJ103 R210B ERJ3GEYJ333 R227 ERJ3GEYJ682 6.8K R210C ERJ3GEYJ333 R228 ERJ3GEYJ682 6.8K R210D ERJ3GEYJ333 R229 ERJ3GEYJ221 R210E ERJ3GEYJ333...
  • Page 78 KX-TES824LA / KX-TEM824LA / 20 FOR THE SCHEMATIC DIAGRAM Note: 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 79 KX-TES824LA / KX-TEM824LA /...
  • Page 80 KX-TES824LA / KX-TEM824LA / 21 SCHEMATIC DIAGRAM (KX-TES824LA/KX-TEM824LA) 21.1. MAIN No.1 (Extention A-D Block) RL201A D205A R215A RL202A RL200A...
  • Page 81 KX-TES824LA / KX-TEM824LA / RL201C R225B D205C...
  • Page 82 KX-TES824LA / KX-TEM824LA / C209 0.022...
  • Page 83 KX-TES824LA / KX-TEM824LA / RL201D D205D TXPWR...
  • Page 84 KX-TES824LA / KX-TEM824LA / 21.2. MAIN No.2 (Extention E-H Block) RL201E D205E...
  • Page 85 KX-TES824LA / KX-TEM824LA / RL201F RL201G D205F D205G...
  • Page 86 KX-TES824LA / KX-TEM824LA / RL201H D205H...
  • Page 87 KX-TES824LA / KX-TEM824LA / C984 C983 C982 C981 C976 C975 C974 C965 0.01u C964 0.01u C961 0.01u C890 0.01u C830 0.01u C860 0.01u C889 0.01u C829 0.01u C859 0.01u C888 0.01u C828 0.01u C858 0.01u C887 0.01u C988 C827 0.01u C857 0.01u...
  • Page 88 KX-TES824LA / KX-TEM824LA / 21.3. MAIN No.3 (CO Block) PC4A R13A N.C PC3A R11A D4A N.C 22 1/8W...
  • Page 89 KX-TES824LA / KX-TEM824LA / C19C C17C 100p PC4C R13B R13C N.C PC3C PC3B R11C R11B D4C N.C D4B N.C TP62B TP14B...
  • Page 90 KX-TES824LA / KX-TEM824LA /...
  • Page 91 KX-TES824LA / KX-TEM824LA / C100 0.022 RA101 RA102...
  • Page 92 KX-TES824LA / KX-TEM824LA / 21.4. MAIN No.4 (Cross-Point Block) CO1 3:12H;5:2B CO2 3:12H;5:2B CO3 3:12H;5:2B CO4 5:2B CO5 5:2B CO6 5:2A CO7 5:2A CO8 5:2A BGM_CO DTMFG TAM2 TP350 TP344 TAM1 TP343 MODEM TP342 OGM2 OGM1 EXT[8] EXT[7] EXT[6] EXT[5]...
  • Page 93 KX-TES824LA / KX-TEM824LA / DATA D[0] AYX3 A[4] A[3] A[2] A[1] A[7] A[6] A[5] IOWR C687 TONE TONE1 TP326 TP325 R631 1.2k TP323 TP322 R630 1.2k TP320 R629 1.2k TP321 TP318 R628 1.2k TP319 R627 1.2k TP313 TP314 TP310 TP311 R626 1.2k...
  • Page 94 KX-TES824LA / KX-TEM824LA /...
  • Page 95 KX-TES824LA / KX-TEM824LA / Q[1] Q[2] Q[3] Q[4] TOE1 STD1 TOE2 STD2 Q[1] Q[2] Q[3] Q[4] OSC2 OSC1 Q[1] Q[2] Q[3] Q[4] OSC2 OSC1...
  • Page 96 KX-TES824LA / KX-TEM824LA / 21.5. MAIN No.5 (ASIC, Memory Block) C762 0.1u C761 0.1u C760 0.1u C759 C758 2.2u...
  • Page 97 KX-TES824LA / KX-TEM824LA / C966 0.01u C749 0.1u C739 0.1u C738 0.1u C737 0.1u R740 C736 0.1u C735 0.1u C773 C772 2.2u C954 0.01u C750 0.1u C748 0.1u C747 0.1u C746 0.1u C745 0.1u C744 0.1u C743 0.1u C742 0.1u...
  • Page 98 KX-TES824LA / KX-TEM824LA / C732 0.1u C731 C730 2.2u C778 6.3V/22u C726 1u C724 0.1u C725 2.2u C779 6.3V/22u RA708 RA709 RA710 RA711 RA712 RA713 RA702 RA703 RA704 RA705 RA701 C911 0.01u C910 0.01u C909 0.01u C908 0.01u C907 0.01u C906 0.01u...
  • Page 99 KX-TES824LA / KX-TEM824LA / RA715 RA716 RA717 RA718 RA719 RA720 RA714 RA707 53 DGND53 DVDD3208 TP641 54 A3 RAMCSn TP640 ROMCSn 55 A4 TP631 56 A5 MEM1CSn TP630 57 A6 MEM2CSn TP629 P57/IOCS15n 58 A7 NCS_CID3 TP628 59 A8 P56/IOCS14n...
  • Page 100 KX-TES824LA / KX-TEM824LA / 21.6. SUB 21.6.1. PROTECTOR +15V D208A TP204A +15V C208A TP230A RL202A C209A ZNR200A 50V/1u 0.01u C207A +15V 0.01u R220A RL202A CN200A D221 ZNR201A C210A R228 0.01u 6.8K L204A TP249 1.5mH TH2A TXPWR TP226A +15V R229 TP282...
  • Page 101 KX-TES824LA / KX-TEM824LA / µ 3.3V µ +3.3V +15V R238 PROTECTOR PRX[1] TP258 ANALOG PRX[1] R235 R232 004:2B 2.2k TP257 TP254 D222 Q210 IC200 TP246 R237 µ R234 TP256 4.7k 3.3V R239 +15V C211 T201 +15V TP237 µ R240 002:6H...
  • Page 102 KX-TES824LA / KX-TEM824LA / 21.6.2. No.2 +15V D208E TXD[5] TP204E 001:6H C208E TP230E TXD[6] C209E ZNR200E 50V/1u 001:6H 0.01u C207E TXD[7] 0.01u R220E 001:6H ZNR201E TXD[8] CN200E C210E 001:6G 0.01u L204E TH2E 1.5mH +15V TXPWR R202E Q209E TP219E Q200E 22 1/4W...
  • Page 103 KX-TES824LA / KX-TEM824LA / 001:1G 001:3G TXPWR TXD[8] +15V TP204H D208H TP230H C209H C208H ZNR200H 0.01u 50V/1u C207H R220H 0.01u ZNR201H CN200H C210H 0.01u L204H TH2H 1.5mH +15V R202H Q209H TXPWR TP219H Q200H 22 1/4W TP212H 001:1F TP210H R204H 68 1/4W...
  • Page 104 KX-TES824LA / KX-TEM824LA / 21.6.3. No.3 C19A R13A PC3A R11A TP14A TP62A 22 1/8W...
  • Page 105 KX-TES824LA / KX-TEM824LA / C19C C17C C17B 100p 100p PC4C R13B R13C PC3C PC3B R11C R11B D4C N.C D4B N.C TP62C TP62B...
  • Page 106 KX-TES824LA / KX-TEM824LA / RA300 RA301 RA302...
  • Page 107 KX-TES824LA / KX-TEM824LA / C303 0.022 C302 0.022 C301 0.022...
  • Page 108 KX-TES824LA / KX-TEM824LA / 21.6.4. No.4 NIOWR 003:12D NIOWR 003:12H RESET RESET 26 27 24 25 +12V TP587 TP588 NC15 TP589 003:12H,003:12D NCS_GA2,NIORD C500 NC16 0.022 TP590 PRX[1],PTXE[0-2],PTX[1] NC28 IC500 001:1H,001:1G,001:1G,001:1G,001:1H TP591 RESET NC29 TP592 +3.3V NC38 CN501 TP650 C507...
  • Page 109 KX-TES824LA / KX-TEM824LA / 3.58MHz TP600 TP613 TP644 TP601 TP648 TP610 TP645 R527 R534 C514 X500 +3.3V 100k 100k +3.3V +3.3V TP614 TP604 C510 C511 C509 C508 0.0056 0.0056 RA502 RA501 R528 R535 TP615 TP605 C512 R533 ST/BT R536 C513 ST/BT 0.22...
  • Page 110 KX-TES824LA / KX-TEM824LA / 21.7. POWER SUPPLY R220 820 R405 R404 R403 R402 2.2K R401 2.2K R217 NC C230 4700P C204 470P C202 R204 2.2K R209 R208 82K 4.7K R221 2.2M C205 2200P R222 R207 R206 C209 1500P C62 0.22...
  • Page 111 KX-TES824LA / KX-TEM824LA / 21.7.1. WAVEFORM...
  • Page 112 KX-TES824LA / KX-TEM824LA /...
  • Page 113 KX-TES824LA / KX-TEM824LA / 21.7.2. Memo...
  • Page 114 KX-TES824LA / KX-TEM824LA / 22 PRINTED CIRCUIT BOARD (KX-TES824LA/KX-TEM824LA) 22.1. MAIN BOARD 22.1.1. COMPONENT VIEW CN1A CN1B CN1C CN200A CN200B CN200C CN200D CN200E CN200F CN200G CN200H CN600 TH1C SA1A SA1B SA1C TH1A TH1B C985 R560 C641 D604 Q216 Q217 ZNR202B...
  • Page 115 KX-TES824LA / KX-TEM824LA / 22.1.2. BOTTOM VIEW C201H C201G C201F C201E C201D C201C C201B C201A Q207E Q207C Q207A Q207D Q207B Q201G Q201F Q201E Q201D Q201C Q201B Q201A RESET R49B -15V C842 D208H D208G DA200F D208G DA200E D208E DA200D D208D DA200C...
  • Page 116 KX-TES824LA / KX-TEM824LA / 22.2. SUB BOARD 22.2.1. COMPONENT VIEW CN200D CN200E CN200F CN200G CN200H CN1A CN1B CN1C CN200A CN200B CN200C SA1B SA1C SA1A TH1A TH1B TH1C ZNR202B ZNR202D RL200A ZNR202A ZNR202C ZNR202E ZNR202F ZNR202G ZNR202H Q216 Q217 R225 VA1C...
  • Page 117 KX-TES824LA / KX-TEM824LA / 22.2.2. BOTTOM VIEW C207G C207E C207C C207A C207H C207F C207D C207B C201H C201H C201D C201B C201A C201G C201E C201C Q207G Q207E Q207C Q207A Q207H Q207F Q207D Q207B Q200G Q200E Q200C Q200A Q200H Q200F Q200D Q200B Q201G...
  • Page 118 ONLY WITH SAME C302 C301 TYPE AND J107 J106 RATINGS OF FUSE. C401 PC31 J101 J103 J105 CN301 CN101 J108 KX-TES824LA/KX-TEM824LA POWER SUPPLY BOARD (COMPONENT VIEW) 22.3.2. BOTTOM VIEW C230 C202 IC201 R204 R202 C204 Q502 Q504 R507 R218 R516 R520 Q202...
  • Page 119 KX-TES824LA / KX-TEM824LA / 23 KX-TE82461X (4-PORT DOORPHONE CARD)
  • Page 120 KX-TES824LA / KX-TEM824LA / 23.1. HOW TO RECOGNIZE THAT Pb FREE SOLDER IS USED...
  • Page 121 KX-TES824LA / KX-TEM824LA / 23.2. LOCATION OF OPTIONAL CARDS 23.2.1. 4-Port Doorphone Card (KX-TE82461X) Function Supports the connection of 4 doorphones and 4 dooropeners. 1. Loosen the screws and open the top and bottom front covers. 2. Attach the 4-Port Doorphone Card to the main unit, connect the cord to the Doorphone Card Connector and secure the screw.
  • Page 122 KX-TES824LA / KX-TEM824LA / 23.3. DOORPHONE/DOOROPENER CARD BLOCK DIAGRAM +15V DOOR1 DOOR2 Power TONE Serge D[7:0] DOOR_SW1 BUSY1 A[2:1] DON1 Door Detect DHK1 nCS,nRD,nWR Hook Detect nRESET IC11 IC6, IC7, IC8 DOPN1 Door Opener Relay #A DOPN2 +15V Door Opener Relay #B +3.3V...
  • Page 123 KX-TES824LA / KX-TEM824LA /...
  • Page 124 KX-TES824LA / KX-TEM824LA / 23.4. EXPLANATION OF BLOCK DIAGRAM/CIRCUIT OPERATIONS 23.4.1. OPTION CARD (KX-TE82461X) 23.4.1.1. This doorphone/door opener card is composed of the control interface with KX-TES824/KX-TEM824 and four doorphone interfaces and four dooropener interfaces section. 1) Doorphone section This card has four doorphone interfaces, but this system has only two door phone intercom paths.
  • Page 125 KX-TES824LA / KX-TEM824LA / 23.5. TROUBLESHOOTING GUIDE 23.5.1. Can Not Call From Doorphone 23.5.2. Can Not Talk 23.5.3. Can Not Use Dooropener...
  • Page 126 KX-TES824LA / KX-TEM824LA / 23.6. IC DATA 23.6.1. IC6, IC7, IC8 Pin No. Pin Name Description DHK1 DOOR Hook detection DHK2 DOOR Hook detection DHK3 DOOR Hook detection DHK4 DOOR Hook detection DCN1 DOOR Phone Connection Detection DCN2 DOOR Phone Connection Detection...
  • Page 127 KX-TES824LA / KX-TEM824LA / 23.7. TERMINAL GUIDE OF ICS, TRANSISTORS AND DIODES...
  • Page 128 KX-TES824LA / KX-TEM824LA / 23.8. ACCESSORIES AND PACKING MATERIALS...
  • Page 129 KX-TES824LA / KX-TEM824LA / 23.9. REPLACEMENT PARTS LIST 23.9.2. MAIN BOARD PARTS (KX-TE82461X) Ref. Part No. Part Name & Description Remarks Note: (ICS) 1. RTL (Retention Time Limited) IC1A PQVINJM2904V IC1B PQVINJM2904V The marking (RTL) indicates that the Retention Time is...
  • Page 130 KX-TES824LA / KX-TEM824LA / Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks PQLE106 COIL ECUV1C104ZFV PQLE106 COIL ECUV1A106ZF PQLE106 COIL ECUV1H104ZFV PQLE106 COIL F2G1E1010011 (JACK) ECUV1H104ZFV PSJJ2T004Z JACK, TEL C101 ECUV1H220JCV (TRANSFORMERS)
  • Page 131 KX-TES824LA / KX-TEM824LA / Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks R17A ERJ14YJ151 R22A ERJ3GEYJ181 R17B ERJ14YJ151 R22B ERJ3GEYJ181 R17C ERJ14YJ151 R22C ERJ3GEYJ181 R17D ERJ14YJ151 R22D ERJ3GEYJ181 R19A ERJ3GEYJ103 R23A ERJ3GEYJ103...
  • Page 132 KX-TES824LA / KX-TEM824LA / 23.11. SCHEMATIC DIAGRAM (KX-TE82461X) <0V> +15V (0V) TP32 BUSY1 220k C10A 1500p TP70 TP19 IC2A TP57 IC5A TP48 1.8k TP100 C14A TP107 DOOR1 0.033u TP77 TP20 +15V TP89 2.2k 50V/1u R10A 330k C11A R15A R23A +15V TP51 3.9k...
  • Page 133 KX-TES824LA / KX-TEM824LA / DOOR1 DOOR2 DOOR1 DOOR PHONE TONE DOOR2 J101 DOOR2 TONE DOOR1 TP200 DHK1 3 1D LD[0] TP201 DHK2 LD[1] 4 2D TP202 DHK3 7 3D LD[2] TP203 DHK4 LD[3] 8 4D TP204 DCN1 LD[4] 13 5D...
  • Page 134 KX-TES824LA / KX-TEM824LA / 23.12. PRINTED CIRCUIT BOARD (KX-TE82461X) KX-TE82461/TA82461 R10 1 IC5C RL2A R10 1 RL2B IC11 RL2C IC5A RL2D PSUP1488Z* PbF DPH4 KX-TE82461X COMPONENT VIEW RL2A +3.3V RL2B TONE RL2C RL2D DOOR2 DOOR1 +15V KX-TE82461X BOTTOM VIEW...
  • Page 135 KX-TES824LA / KX-TEM824LA / 24 KX-TE82474X (8-PORT SLT EXTENSION CARD)
  • Page 136 KX-TES824LA / KX-TEM824LA / 24.1. HOW TO RECOGNIZE THAT Pb FREE SOLDER IS USED...
  • Page 137 KX-TES824LA / KX-TEM824LA / 24.2. LOCATION OF OPTIONAL CARDS 24.2.1. 8-Port SLT Extension Card (KX-TE82474X) Function Adds 8 single line telephone (SLT) extensions on the basic systems of KX-TES824/KX-TEM824. Installing KX-TE82474 to KX-TES824 1. Loosen the screws and open the top and bottom front covers.
  • Page 138 KX-TES824LA / KX-TEM824LA / 24.2.2. Installing KX-TE82474X on 3-Port Analogue CO Line and 8-Port Hybrid Extension Card (KX-TE82483X) installed to KX-TES824LA Note Install the KX-TE82474 on top of the KX-TE82483. 1. Loosen the screws and open the top and bottom front covers.
  • Page 139 KX-TES824LA / KX-TEM824LA / 24.2.3. Installing KX-TE82474X to KX-TEM824LA 1. Loosen the screws and open the top and bottom front covers. 2. Remove the front panel. 3. Attach the 2 extension connectors to the main unit, install the card as shown below, and secure the 3 screws.
  • Page 140 KX-TES824LA / KX-TEM824LA / 24.3. BLOCK DIAGRAM IC700 Host i/f Q1-4,TOE1,2,STD1,2 ASIC Exp308 (2AP) IC704, IC705 /Exp208 (3AP) DTMFR (1,2) CROSS (I/O)HOOK17-24,BELL17-24 Card (For EXT) POINT EXT17 EXT17-24 CONNECTOR CO7-8 EXT18 IC701, IC702, IC703 EXT19 CN701, CN702 EXT20 EXT21 EXT22...
  • Page 141 KX-TES824LA / KX-TEM824LA / 24.4.2. Circuit Operation 24.4.2.1. Cross Point Switch Circuit 24.4.2.1.1. Composition The cross point circuit composed of three cross point switch IC´s. (IC701:8X16, IC702:8X8, IC703:4X8) 1) Cross Point Switch IC Operation The cross point SW (IC701) contains a 8X16 array of cross point switches along with a 7 to 128 line decoder and latch circuits.
  • Page 142 KX-TES824LA / KX-TEM824LA /...
  • Page 143 KX-TES824LA / KX-TEM824LA /...
  • Page 144 KX-TES824LA / KX-TEM824LA / 24.4.3. Intercom Circuit 1) Composition This is composed of the following circuits: a) +15V power source for the extension telephones b) Hook detect for SLT and pulse dialing detect c) Bell ring trip section 2) Circuit operation a) Power supply to the telephone With the telephone off hook, a DC loop is formed, and current is supplied to the telephone.
  • Page 145 KX-TES824LA / KX-TEM824LA / c) Bell ringing trip section When the telephone is a signal line telephone, extension calling is executed by means of a ringing signal. When the ringing signal is supplied, RL201 turns ON and the current flows are as follows: Bell transformer →...
  • Page 146 KX-TES824LA / KX-TEM824LA / 24.4.5. INT CALLID Interface Circuit By using the DSP built into the ASIC, it is possible to produce CALLID signal and send it through the cross point to each extension. The CALLID signal can be switched between FSK and DTMF. There are three sources of the extension CALL ID in the system.
  • Page 147 KX-TES824LA / KX-TEM824LA / 24.5. TROUBLESHOOTING GUIDE 24.5.1. No Dial Tone 24.5.2. Cannot Dial...
  • Page 148 KX-TES824LA / KX-TEM824LA / 24.5.3. Cannot Call Extension...
  • Page 149 KX-TES824LA / KX-TEM824LA / 24.6. IC DATA 24.6.1. IC700 PIN No Pin Name Function BELL17 Ext BELL Control 17 BELL18 Ext BELL Control 18 BELL19 Ext BELL Control 19 BELL20 Ext BELL Control 20 BELL21 Ext BELL Control 21 BELL22...
  • Page 150 KX-TES824LA / KX-TEM824LA / PIN No Pin Name Function DTMF Rx Data[0] DTMF Rx Data[1] DTMF Rx Data[2] DTMF Rx Data[3] STD7 DTMF-R1 Status STD8 DTMF-R2 Status TOE7 DTMF-R1 Data output Enable TOE8 DTMF-R2 Data output Enable Reserve not used...
  • Page 151 KX-TES824LA / KX-TEM824LA / 24.8. CABINET AND ELECTRICAL PARTS 24.9. ACCESSORIES AND PACKING MATERIALS...
  • Page 152 KX-TES824LA / KX-TEM824LA / 24.10. REPLACEMENT PARTS LIST Ref. Part No. Part Name & Description Remarks (KX-TE82474X) XYN3+F8 SCREW PSPN1070Z CUSHION Note: PSPP1045Z PROTECTION COVER PSPP1052Z PROTECTION COVER 1. RTL (Retention Time Limited) PSZKTE82474X GIFT BOX The marking (RTL) indicates that the Retention Time is...
  • Page 153 KX-TES824LA / KX-TEM824LA / Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks D202B MA8036H DIODE(SI) RL201A PQSL41Z RELAY D202C MA8036H DIODE(SI) RL201B PQSL41Z RELAY D202D MA8036H DIODE(SI) RL201C PQSL41Z RELAY D202E MA8036H...
  • Page 154 KX-TES824LA / KX-TEM824LA / Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks C206E ECUV1C393KBV 0.039 C912 ECUV1H103KBV 0.01 C206F ECUV1C393KBV 0.039 C913 ECUV1H103KBV 0.01 C206G ECUV1C393KBV 0.039 C914 ECUV1H103KBV 0.01 C206H ECUV1C393KBV 0.039...
  • Page 155 KX-TES824LA / KX-TEM824LA / Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks R206A ERJ1WYJ102 R219B ERJ3GEYJ102 R206B ERJ1WYJ102 R219C ERJ3GEYJ102 R206C ERJ1WYJ102 R219D ERJ3GEYJ102 R206D ERJ1WYJ102 R219E ERJ3GEYJ102 R206E ERJ1WYJ102 R219F ERJ3GEYJ102...
  • Page 156 KX-TES824LA / KX-TEM824LA / 24.11. FOR THE SCHEMATIC DIAGRAM Note: 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 157 KX-TES824LA / KX-TEM824LA / 24.12. MEMO...
  • Page 158 KX-TES824LA / KX-TEM824LA / 24.13. SCHEMATIC DIAGRAM (KX-TE82474X) 24.13.1. No.1 CN200A +15V R202A TP212A Q200A 22 1/4W TP210A R204A BELL Q202A 68 1/4W CIRCUIT TP207A RL200A R200A C202A RL201A TP231 16V/10u 6.8k C204A TP202A EXT[17] EXT[17] EXT[17] TP201A TP206A 50V/2.2...
  • Page 159 KX-TES824LA / KX-TEM824LA / CN200D BELL[17] +15V R202D Q200D 22 1/4W TP212D TP210D R204D 68 1/4W Q202D TP207D R200D C202D RL201D 16V/10u 6.8k TP201D C204D TP206D TP202D EXT[20] EXT[20] 50V/2.2 ZNR202D C200D D202D 003:12G 0.01u T200D TP215D ZNR203D +3.3V C201D...
  • Page 160 KX-TES824LA / KX-TEM824LA / 24.13.2. No.2 CN200E +15V R202E Q200E 22 1/4W TP212E R204E TP210E 68 1/4W Q202E TP207E R200E C202E RL201E 16V/10u 6.8k TP201E C204E TP206E TP202E EXT[21] EXT[21] 50V/2.2 003:12G C200E ZNR202E D202E 0.01u TP215E T200E +3.3V ZNR203E...
  • Page 161 KX-TES824LA / KX-TEM824LA / CN200H +15V R202H TP212H 22 1/4W Q200H R204H TP210H 68 1/4W Q202H TP207H C202H R200H RL201H 16V/10u TP201H TP206H C204H TP202H 6.8k EXT[24] EXT[24] 50V/2.2 ZNR202H C200H D202H 003:12G 0.01u T200H TP215H ZNR203H +3.3V C201H D203H 0.01u...
  • Page 162 KX-TES824LA / KX-TEM824LA / 24.13.3. No.3 BELL[17-24],HOOK[17-24] DTMFR10 003:11C R700 TP313 C712 TP316 100k 0.0056 TP306 TP322 TP329 TP330 TP519 IC700 R701 TP314 C713 TP307 TP321 DTMFR9 C715 X700 +3.3V 100k 0.0056 P00 4 003:11C Q[1] TP337 +3.3V Q[2] TP338 P01 5 +3.3V...
  • Page 163 KX-TES824LA / KX-TEM824LA / TP489 SA700 +3.3V TP490 J714 CN701 C708 TP520 26 27 24 25 25V/100u J719 C731 +12V TP390 TP391 TP424 CS_X33 TP476 R706 TP392 +15V TP425 CS_X31 +12V PRX[2] IC706 TP477 NC15 TP393 3 VCC C702 TP478...
  • Page 164 KX-TES824LA / KX-TEM824LA / 24.14. PRINTED CIRCUIT BOARD (KX-TE82474X) 24.14.1. Component View CN200G CN200E CN200F CN200H CN1A CN1B CN200A CN200B CN200D CN200C SA1A SA1B TH1A TH1B SA700 RL200A ZNR202A ZNR202B ZNR202C ZNR202D ZNR202E ZNR202F ZNR202G ZNR202H R226 RL202A R227 Q10A...
  • Page 165 KX-TES824LA / KX-TEM824LA / 24.14.2. Bottom View C207H C207G C207F C207E C207D C207C C207B C207A C201H C201G C201F C201E C201D C201C C201B C201A Q207H Q207G Q207F Q207E Q207D Q207C Q207B Q207A Q200H Q200G Q200F Q200E Q200D Q200C Q200B Q200A Q201G...
  • Page 166 KX-TES824LA / KX-TEM824LA / 25 KX-TE82480X (2-PORT ANALOGUE CO LINE AND 8- PORT SLT EXTENSION CARD)
  • Page 167 KX-TES824LA / KX-TEM824LA / 25.1. HOW TO RECOGNIZE THAT Pb FREE SOLDER IS USED...
  • Page 168 KX-TES824LA / KX-TEM824LA / 25.2. LOCATION OF OPTIONAL CARDS 25.2.1. 2-Port Analogue CO Line and 8-Port SLT Extension Card (KX-TE82480X) Function Adds 2 outside (CO) lines and 8 single line telephone (SLT) extensions on the basic system KX-TES824/KX-TEM824. Installing KX-TE82480 to KX-TES824 1.
  • Page 169 KX-TES824LA / KX-TEM824LA / 25.2.2. Installing KX-TE82480X on 3-Port Analogue CO Line and 8-Port Hybrid Extension Card (KX-TE82483X) installed to KX-TES824LA Note Install the KX-TE82480 on top of the KX-TE82483. 1. Loosen the screws and open the top and bottom front covers.
  • Page 170 KX-TES824LA / KX-TEM824LA / 5. Insert the modular plugs of the telephone line cords (2-conductor wiring) into the card’s modular CO ports. 6. Connect the line cords to the terminal board or the modular jacks from the telephone company. 7. Insert the modular plugs of the telephone line cords (2-conductor wiring) into the card’s modular extension jacks.
  • Page 171 KX-TES824LA / KX-TEM824LA / 25.2.3. Installing KX-TE82480X to KX-TEM824LA 1. Loosen the screws and open the top and bottom front covers. 2. Using cutting pliers, cut the 6 parts marked with circles, and remove the front panel as shown below.
  • Page 172 KX-TES824LA / KX-TEM824LA / 25.3. BLOCK DIAGRAM CID7-8 (I/O) Host i/f IC700 Exp308 Q1-4,TOE1,2,STD1,2 ASIC (2AP) /Exp208 CO7-8 IC704, IC705 (3AP) DTMFR(1,2) Card (I/O)HOOK17-24,BELL17-24 CROSS (FOR EXT) POINT EXT17 CONNECTOR EXT17-24 CO7-8 EXT18 (APT i/f)PRX3,PTX3,PTXE1-3 IC701, IC702, IC703 EXT19 CN701, CN702...
  • Page 173 KX-TES824LA / KX-TEM824LA / 25.5. CIRCUIT OPERATION 25.5.1. CO Interface Circuit 25.5.1.1. Composition This is composed of the following circuit: 1) Bell signal detection 2) DC loop formation circuit 3) Pulse dial transmission circuit 4) CALL ID interface circuit 5) COL bidirectional amplifier circuit 1) Bell signal detection When CO line is idle, photo coupler PC1, PC2 are OFF.
  • Page 174 KX-TES824LA / KX-TEM824LA / 2) DC loop formation circuit In the off hook status, PC5 is ON. DC loop path: Tip→L1→D1→D2→D3→Q10(E-C)→Q1(C-E)→R9→R8→D3→L1→Ring At this time, the output of the photo coupler PC1 changes level from High to low. Ring→L1→D3→R8→R9→Q1(E-C)→Q10(C-E)→D3→D2→D1→L1→Tip At this time, the output of the photo coupler PC2 changes level from High to low.
  • Page 175 KX-TES824LA / KX-TEM824LA / 4) CALL ID interface circuit It is insulated by the transformer in a COL circuit, and the call ID signal inputted from outside line is transmitted to a CALLID option card. The flow of a CALLID signal Tip→L1→R2→PC1(1-2)→C3→T2→R5→L1→Ring...
  • Page 176 KX-TES824LA / KX-TEM824LA / 1) Conference switch Normally, pin 6 of the analog switch IC2 is low level, but during conferences, this pin becomes high level. Because, during conferences, it should compensate the return loss by connecting the balance network BN2 and the balance network BN3 in parallel.
  • Page 177 KX-TES824LA / KX-TEM824LA / 25.5.2. Cross Point Switch Circuit 25.5.2.1. Composition The cross point circuit composed of three cross point switch IC´s. (IC701:8X16, IC702:8X8, IC703:4X8) 1) Cross Point Switch IC Operation The cross point SW (IC701) contains a 8X16 array of cross point switches along with a 7 to 128 line decoder and latch circuits.
  • Page 178 KX-TES824LA / KX-TEM824LA /...
  • Page 179 KX-TES824LA / KX-TEM824LA /...
  • Page 180 KX-TES824LA / KX-TEM824LA / 25.5.3. Intercom Circuit 1) Composition This is composed of the following circuits: a) +15V power source for the extension telephones b) Hook detect for SLT and pulse dialing detect c) Bell ring trip section 2) Circuit operation a) Power supply to the telephone With the telephone off hook, a DC loop is formed, and current is supplied to the telephone.
  • Page 181 KX-TES824LA / KX-TEM824LA / c) Bell ringing trip section When the telephone is a signal line telephone, extension calling is executed by means of a ringing signal. When the ringing signal is supplied, RL201 turns ON and the current flows are as follows: Bell transformer →...
  • Page 182 KX-TES824LA / KX-TEM824LA / 25.5.5. DTMF Receiver Circuit 25.5.5.1. Composition The DTMF receiver circuit is composes of two DTMF receivers. IC704 and IC705 are used for the DTMF receivers from SLT connected to the extension. The DTMF signal is the 4bit parallel data and read by ASIC.
  • Page 183 KX-TES824LA / KX-TEM824LA / 25.6. TROUBLESHOOTING GUIDE 25.6.1. No Dial Tone 25.6.2. Cannot Dial...
  • Page 184 KX-TES824LA / KX-TEM824LA / 25.6.3. Cannot Call Extension 25.6.4. Cannot Receive Incoming Call 25.6.5. Cannot Send DTMF Dialing...
  • Page 185 KX-TES824LA / KX-TEM824LA / 25.6.6. Cannot Receive Call Dial Tone 25.6.7. Cannot Send A Hold On Music...
  • Page 186 KX-TES824LA / KX-TEM824LA / 25.7. IC DATA 25.7.1. IC700 PIN No Pin Name Function BELL17 Ext BELL Control 17 BELL18 Ext BELL Control 18 BELL19 Ext BELL Control 19 BELL20 Ext BELL Control 20 BELL21 Ext BELL Control 21 BELL22...
  • Page 187 KX-TES824LA / KX-TEM824LA / PIN No Pin Name Function DTMF Rx Data[0] DTMF Rx Data[1] DTMF Rx Data[2] DTMF Rx Data[3] STD7 DTMF-R1 Status STD8 DTMF-R2 Status TOE7 DTMF-R1 Data output Enable TOE8 DTMF-R2 Data output Enable Reserve not used...
  • Page 188 KX-TES824LA / KX-TEM824LA / 25.9. CABINET AND ELECTRICAL PARTS 25.10. ACCESSORIES AND PACKING MATERIALS...
  • Page 189 KX-TES824LA / KX-TEM824LA / 25.11. REPLACEMENT PARTS LIST Ref. Part No. Part Name & Description Remarks (KX-TE82480X) XYN3+F8 SCREW PSPN1070Z CUSHION Note: PSPP1045Z PROTECTION COVER PSPP1052Z PROTECTION COVER 1. RTL (Retention Time Limited) PSZKTE82480X GIFT BOX The marking (RTL) indicates that the Retention Time is...
  • Page 190 KX-TES824LA / KX-TEM824LA / Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks Q216 2SD1819A TRANSISTOR(SI) RA701 D1H81034A010 RESISTOR ARRAY, 10K Q217 2SD1819A TRANSISTOR(SI) RA702 D1H82214A024 RESISTOR ARRAY, 220K B1GFAFNN0001 TRANSISTOR(SI) RA703 D1H82214A024...
  • Page 191 KX-TES824LA / KX-TEM824LA / Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks F2G1H1000010 C205B PSCEA1HN4R7 F2G1H1000010 C205C PSCEA1HN4R7 F2G1H1000010 C205D PSCEA1HN4R7 F2G1H1000010 C205E PSCEA1HN4R7 ECUV1H102KBV 0.001 C205F PSCEA1HN4R7 ECUV1H102KBV 0.001 C205G PSCEA1HN4R7...
  • Page 192 KX-TES824LA / KX-TEM824LA / Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks C831 ECUV1H103KBV 0.01 R20B ERJ3GEYF122 1.2K C832 ECUV1H103KBV 0.01 R21A ERJ3GEY0R00 C833 ECUV1H103KBV 0.01 R21B ERJ3GEY0R00 C851 ECUV1H103KBV 0.01 R22A...
  • Page 193 KX-TES824LA / KX-TEM824LA / Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks R202A ERJ14YJ220 R211B ERJ3GEYJ123 R202B ERJ14YJ220 R211C ERJ3GEYJ123 R202C ERJ14YJ220 R211D ERJ3GEYJ123 R202D ERJ14YJ220 R211E ERJ3GEYJ123 R202E ERJ14YJ220 R211F ERJ3GEYJ123...
  • Page 194 KX-TES824LA / KX-TEM824LA / Ref. Part No. Part Name & Description Remarks R721 ERJ3GEYJ122 1.2K R723 ERJ3GEYJ122 1.2K R724 ERJ3GEYJ122 1.2K R727 ERJ3GEYJ103 R728 ERJ3GEYJ103 R731 ERJ3GEYJ103 R732 ERJ3GEYJ103 R733 ERJ3GEYJ103 R734 ERJ3GEYJ103 R735 ERJ3GEYJ103 R736 ERJ3GEYJ103...
  • Page 195 KX-TES824LA / KX-TEM824LA / 25.12. FOR THE SCHEMATIC DIAGRAM Note: 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 196 KX-TES824LA / KX-TEM824LA / 25.13. SCHEMATIC DIAGRAM (KX-TE82480X) 25.13.1. No.1 +15V +15V CN200A D221 RL200A R228 6.8K TP249 +15V TP282 R229 R204A R202A R227 68 1/4W Q200A 22 1/4W 6.8K TP250 Q217 PD_RLY3 TP210A TP212A TP283 TP284 T[1] BELL Q216...
  • Page 197 KX-TES824LA / KX-TEM824LA / CN200D +15V R204D R202D Q200D 68 1/4W 22 1/4W TP210D TP212D Q202D TP207D R200D C202D RL201D 6.8k 16V/10u TP201D C204D TP202D TP206D EXT[20] EXT[20] 50V/2.2 003:12G ZNR202D C200D D202D 0.01u T200D TP215D +3.3V ZNR203D C201D D203D 0.01u...
  • Page 198 KX-TES824LA / KX-TEM824LA / 25.13.2. No.2 CN200E +15V R204E R202E 68 1/4W Q200E 22 1/4W TP210E TP212E Q202E TP207E C202E R200E RL201E 16V/10u 6.8k TP201E TP206E C204E TP202E EXT[21] EXT[21] 003:12G 50V/2.2 C200E ZNR202E D202E 0.01u TP215E T200E ZNR203E +3.3V...
  • Page 199 KX-TES824LA / KX-TEM824LA / CN200H +15V R204H R202H 68 1/4W Q200H 22 1/4W TP210H TP212H Q202H TP207H R200H C202H RL201H 6.8k 16V/10u TP201H C204H TP206H TP202H EXT[24] EXT[24] 50V/2.2 003:12G ZNR202H C200H D202H 0.01u T200H TP215H ZNR203H +3.3V C201H D203H 0.01u...
  • Page 200 KX-TES824LA / KX-TEM824LA / 25.13.3. No.3 PC4A R13A PC3A R11A D4A N.C TP14A TP62A 22 1/8W...
  • Page 201 KX-TES824LA / KX-TEM824LA / Q[1] Q[2] Q[3] Q[4] TOE9 STD9 TOE10 STD10 Q[1] Q[2] Q[3] Q[4] OSC2 OSC1 R13B PC3B R11B Q[1] Q[2] Q[3] Q[4] D4B N.C OSC2 OSC1 TP62B TP14B...
  • Page 202 KX-TES824LA / KX-TEM824LA / D[0] DATA A[4] EXT[24] EXT[24] TP471 AYX3 A[3] EXT[23] EXT[23] TP469 A[2] EXT[22] EXT[22] TP467 A[1] EXT[21] EXT[21] TP465 A[7] EXT[20] EXT[20] TP462 A[6] EXT[19] EXT[19] TP459 A[5] EXT[18] EXT[18] TP456 IOWR EXT[17] EXT[17] TP453 C732...
  • Page 203 KX-TES824LA / KX-TEM824LA / C707 25V/100u C706 C734 25V/100u EXT[24] TP472 R724 1.2k EXT[23] TP470 1.2k R723 EXT[22] TP468 1.2k R721 EXT[21] TP466 R720 1.2k EXT[20] TP463 R719 1.2k EXT[19] TP460 R718 1.2k EXT[18] TP457 1.2k R717 EXT[17] TP454 1.2k...
  • Page 204 KX-TES824LA / KX-TEM824LA / 25.14. PRINTED CIRCUIT BOARD (KX-TE82480X) 25.14.1. Component View CN200G CN200E CN200F CN200H CN1A CN1B CN200A CN200B CN200D CN200C SA1A SA1B TH1A TH1B SA700 RL200A ZNR202A ZNR202B ZNR202C ZNR202D ZNR202E ZNR202F ZNR202G ZNR202H R226 RL202A R227 Q10A...
  • Page 205 KX-TES824LA / KX-TEM824LA / 25.14.2. Bottom View C207H C207G C207F C207E C207D C207C C207B C207A C201H C201G C201F C201E C201D C201C C201B C201A Q207E Q207D Q207C Q207B Q207A Q207H Q207G Q207F Q200H Q200G Q200F Q200E Q200D Q200C Q200B Q200A Q201G...
  • Page 206 KX-TES824LA / KX-TEM824LA / 26 KX-TE82483X (3-PORT ANALOGUE CO LINE AND 8- PORT HYBRID EXTENSION)
  • Page 207 KX-TES824LA / KX-TEM824LA / 26.1. HOW TO RECOGNIZE THAT Pb FREE SOLDER IS USED...
  • Page 208 KX-TES824LA / KX-TEM824LA / 26.2. LOCATION OF OPTIONAL CARDS 26.2.1. 3-Port Analogue CO Line and 8-Port Hybrid Extension (KX-TE82483X) Function Adds 3 outside (CO) lines and 8 hybrid extensions on the KX-TES824 basic system. Installing KX-TE82483 to KX-TES824 1. Loosen the screws and open the top and bottom front covers.
  • Page 209 KX-TES824LA / KX-TEM824LA / 5. Insert the modular plugs of the telephone line cords (2-conductor wiring) into the card’s modular CO ports. 6. Connect the line cords to the terminal board or the modular jacks from the telephone company. 7. Insert the modular plugs of the telephone line cords (2-conductor wiring) into the card’s modular extension jacks.
  • Page 210 KX-TES824LA / KX-TEM824LA / 26.3. BLOCK DIAGRAM CID4-6 (I/O) Host i/f IC10 Exp308 Q1-4,TOE1,2,STD1,2 ASIC (2AP) /Exp208 CO4-6 IC511, IC512 (3AP) DTMFR(1,2) Card (I/O)HOOK9-16,BELL9-16 CROSS (FOR EXT) POINT EXT9 CONNECTOR EXT9-16 CO4-6 EXT10 (APT i/f)PRX2,PTX2,PTXE1-3 IC500, IC501, IC502 EXT11 CN501, CN502...
  • Page 211 KX-TES824LA / KX-TEM824LA / 26.5. CIRCUIT OPERATION 26.5.1. CO Interface Circuit 26.5.1.1. Composition This is composed of the following circuit: 1) Bell signal detection 2) DC loop formation circuit 3) Pulse dial transmission circuit 4) CALL ID interface circuit 5) COL bidirectional amplifier circuit 1) Bell signal detection When CO line is idle, photo coupler PC1, PC2 are OFF.
  • Page 212 KX-TES824LA / KX-TEM824LA / 2) DC loop formation circuit In the off hook status, PC5 is ON. DC loop path: Tip→L1→D1→D2→D3→Q10(E-C)→Q1(C-E)→R9→R8→D3→L1→Ring At this time, the output of the photo coupler PC1 changes level from High to low. Ring→L1→D3→R8→R9→Q1(E-C)→Q10(C-E)→D3→D2→D1→L1→Tip At this time, the output of the photo coupler PC2 changes level from High to low.
  • Page 213 KX-TES824LA / KX-TEM824LA / 4) CALL ID interface circuit It is insulated by the transformer in a COL circuit, and the call ID signal inputted from outside line is transmitted to a CALLID option card. The flow of a CALLID signal Tip→L1→R2→PC1(1-2)→C3→T2→R5→L1→Ring...
  • Page 214 KX-TES824LA / KX-TEM824LA / 1) Conference switch Normally, pin 6 of the analog switch IC2 is low level, but during conferences, this pin becomes high level. Because, during conferences, it should compensate the return loss by connecting the balance network BN2 and the balance network BN3 in parallel.
  • Page 215 KX-TES824LA / KX-TEM824LA / 26.5.2. Cross Point Switch Circuit 26.5.2.1. Composition The cross point circuit composed of three cross point switch IC´s. (IC500:8X16, IC501:8X8, IC502:4X8) 1) Cross Point Switch IC Operation The cross point SW (IC500) contains a 8X16 array of cross point switches along with a 7 to 128 line decoder and latch circuits.
  • Page 216 KX-TES824LA / KX-TEM824LA /...
  • Page 217 KX-TES824LA / KX-TEM824LA /...
  • Page 218 KX-TES824LA / KX-TEM824LA / 26.5.3. Intercom Circuit 1) Composition This is composed of the following circuits: a) +15V power source for the extension telephones b) Hook detect for SLT and pulse dialing detect c) Bell ring trip section 2) Circuit operation a) Power supply to the telephone With the telephone off hook, a DC loop is formed, and current is supplied to the telephone.
  • Page 219 KX-TES824LA / KX-TEM824LA / c) Bell ringing trip section When the telephone is a signal line telephone, extension calling is executed by means of a ringing signal. When the ringing signal is supplied, RL201 turns ON and the current flows are as follows: Bell transformer →...
  • Page 220 KX-TES824LA / KX-TEM824LA / 26.5.5. DATA Communication Circuit 26.5.5.1. Composition This circuit is composed of the ASIC and the data communication interface circuits for the ICM circuit. 26.5.5.2. Circuit Operation 1) Data Communication of ASIC The APT I/f module is built into the CPU. It is for the APT communication of one block (8ch) and has the module of three blocks (24ch) at maximum.
  • Page 221 KX-TES824LA / KX-TEM824LA / 26.5.6. DTMF Receiver Circuit 26.5.6.1. Composition The DTMF receiver circuit is composes of two DTMF receivers. IC510 and IC511 are used for the DTMF receivers from SLT connected to the extension. The DTMF signal is the 4bit parallel data and read by ASIC.
  • Page 222 KX-TES824LA / KX-TEM824LA / 26.6. TROUBLESHOOTING GUIDE 26.6.1. No Dial Tone 26.6.2. Cannot Dial...
  • Page 223 KX-TES824LA / KX-TEM824LA / 26.6.3. Cannot Call Extension 26.6.4. Cannot Use Proprietary Telephone 26.6.5. Cannot Receive Incoming Call 26.6.6. Cannot Send DTMF Dialing...
  • Page 224 KX-TES824LA / KX-TEM824LA / 26.6.7. Cannot Receive Call Dial Tone 26.6.8. Cannot Send a Hold On Music...
  • Page 225 KX-TES824LA / KX-TEM824LA / 26.7. IC DATA 26.7.1. IC10 PIN No Pin Name Function DTMF Rx Data[0] DTMF Rx Data[1] DTMF Rx Data[2] DTMF Rx Data[3] STD7 DTMF-R1 Status STD8 DTMF-R2 Status TOE7 DTMF-R1 Data output Enable TOE8 DTMF-R2 Data output Enable...
  • Page 226 KX-TES824LA / KX-TEM824LA / PIN No Pin Name Function HOOK11 Ext Hook Detect 11 HOOK12 Ext Hook Detect 12 HOOK13 Ext Hook Detect 13 HOOK14 Ext Hook Detect 14 HOOK15 Ext Hook Detect 15 HOOK16 Ext Hook Detect 16 CONF6...
  • Page 227 KX-TES824LA / KX-TEM824LA / 26.8. TERMINAL GUIDE OF ICS, TRANSISTORS AND DIODES...
  • Page 228 KX-TES824LA / KX-TEM824LA / 26.9. CABINET AND ELECTRICAL PATRS 26.10. ACCESSORIES AND PACKING MATERIALS...
  • Page 229 KX-TES824LA / KX-TEM824LA / 26.11. REPLACEMENT PARTS LIST Ref. Part No. Part Name & Description Remarks (KX-TE82483X) PSHE1051Z SPACER PSPN1070Z CUSHION Note: PSPP1045Z PROTECTION COVER PSPP1052Z PROTECTION COVER 1. RTL (Retention Time Limited) PSZKTE82483X GIFT BOX The marking (RTL) indicates that the Retention Time is...
  • Page 230 KX-TES824LA / KX-TEM824LA / Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks Q207C 2SD1819A TRANSISTOR(SI) D205E MA111 DIODE(SI) Q207D 2SD1819A TRANSISTOR(SI) D205F MA111 DIODE(SI) Q207E 2SD1819A TRANSISTOR(SI) D205G MA111 DIODE(SI) Q207F 2SD1819A...
  • Page 231 KX-TES824LA / KX-TEM824LA / Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks CN200E PQJJ1T011Y JACK, TEL ECQE2E105KZ CN200F PQJJ1T011Y JACK, TEL ECQE2E105KZ CN200G PQJJ1T011Y JACK, TEL ECUV1C474ZFV 0.47 CN200H PQJJ1T011Y JACK, TEL ECUV1C474ZFV 0.47...
  • Page 232 KX-TES824LA / KX-TEM824LA / Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks C202E F2G1C1000015 C303 ECUV1C223KBV 0.022 C202F F2G1C1000015 C304 ECUV1C223KBV 0.022 C202G F2G1C1000015 C305 ECUV1H104ZFV C202H F2G1C1000015 C500 ECUV1H223KBV 0.022 C203A...
  • Page 233 KX-TES824LA / KX-TEM824LA / Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks C912 ECUV1H103KBV 0.01 R18C ERJ3GEY0R00 C913 ECUV1H103KBV 0.01 R20A ERJ3GEYF122 1.2K C914 ECUV1H103KBV 0.01 R20B ERJ3GEYF122 1.2K C915 ECUV1H103KBV 0.01...
  • Page 234 KX-TES824LA / KX-TEM824LA / Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks R49A ERJ3GEYJ473 R206E ERJ1WYJ102 R49B ERJ3GEYJ473 R206F ERJ1WYJ102 R49C ERJ3GEYJ473 R206G ERJ1WYJ102 R50A ERJ3GEYJ473 R206H ERJ1WYJ102 R50B ERJ3GEYJ473 R207A ERJ3GEYJ333...
  • Page 235 KX-TES824LA / KX-TEM824LA / Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks R219F ERJ3GEYJ102 R228 ERJ3GEYJ682 6.8K R219G ERJ3GEYJ102 R229 ERJ3GEYJ221 R219H ERJ3GEYJ102 R231 ERJ3GEYJ273 R220A PQ4R10XJ271 R232 ERJ3GEYJ273 R220B PQ4R10XJ271 R235 ERJ3GEYJ222 2.2K...
  • Page 236 KX-TES824LA / KX-TEM824LA / 26.13. SCHEMATIC DIAGRAM (KX-TE82483X) 26.13.1. No.1 PROTECTOR +15V D208A TP204A +15V C208A TP230A RL202A C209A ZNR200A 50V/1u 0.01u C207A +15V 0.01u R220A RL202A CN200A D221 ZNR201A C210A R228 0.01u 6.8K L204A TP249 TH2A 1.5mH TXPWR TP226A...
  • Page 237 KX-TES824LA / KX-TEM824LA / µ 3.3V µ +3.3V +15V R238 PROTECTOR PRX[1] TP258 ANALOG PRX[1] R235 R232 2.2k TP257 004:2B TP254 D222 Q210 IC200 TP246 R237 µ R234 TP256 4.7k 3.3V R239 +15V C211 T201 +15V µ TP237 R240 002:6H...
  • Page 238 KX-TES824LA / KX-TEM824LA / 26.13.2. No.2 +15V D208E TXD[5] TP204E 001:6H C208E TP230E TXD[6] C209E ZNR200E 50V/1u 001:6H 0.01u C207E TXD[7] 0.01u R220E 001:6H ZNR201E TXD[8] CN200E C210E 001:6G 0.01u L204E TH2E 1.5mH +15V TXPWR R202E Q209E TP219E Q200E 22 1/4W...
  • Page 239 KX-TES824LA / KX-TEM824LA / 001:1G 001:3G TXPWR TXD[8] +15V TP204H D208H TP230H C209H C208H ZNR200H 0.01u 50V/1u C207H R220H 0.01u ZNR201H CN200H C210H 0.01u L204H TH2H 1.5mH +15V R202H Q209H TXPWR TP219H Q200H 22 1/4W TP212H 001:1F TP210H R204H 68 1/4W...
  • Page 240 KX-TES824LA / KX-TEM824LA / 26.13.3. No.3 C19A R13A PC3A R11A TP14A TP62A 22 1/8W...
  • Page 241 KX-TES824LA / KX-TEM824LA / C19C C17C C17B 100p 100p PC4C R13B R13C PC3C PC3B R11C R11B D4C N.C D4B N.C TP62C TP62B...
  • Page 242 KX-TES824LA / KX-TEM824LA / RA300 RA301 RA302...
  • Page 243 KX-TES824LA / KX-TEM824LA / C303 0.022 C302 0.022 C301 0.022...
  • Page 244 KX-TES824LA / KX-TEM824LA / 26.13.4. No.4 NIOWR 003:12D NIOWR 003:12H RESET RESET 26 27 24 25 +12V TP587 TP588 NC15 TP589 003:12H,003:12D NCS_GA2,NIORD C500 NC16 0.022 TP590 PRX[1],PTXE[0-2],PTX[1] NC28 IC500 001:1H,001:1G,001:1G,001:1G,001:1H TP591 RESET NC29 TP592 +3.3V NC38 CN501 TP650 C507...
  • Page 245 KX-TES824LA / KX-TEM824LA / 3.58MHz TP600 TP613 TP644 TP601 TP648 TP610 TP645 R527 R534 C514 X500 +3.3V 100k 100k +3.3V +3.3V TP614 TP604 C510 C511 C509 C508 0.0056 0.0056 RA502 RA501 R528 R535 TP615 TP605 C512 R533 ST/BT R536 C513 ST/BT 0.22...
  • Page 246 KX-TES824LA / KX-TEM824LA / 26.14. PRINTED CIRCUIT BOARD (KX-TE82483X) 26.14.1. Component View CN200D CN200E CN200F CN200G CN200H CN1A CN1B CN1C CN200A CN200B CN200C SA1B SA1C SA1A TH1A TH1B TH1C ZNR202B ZNR202D RL200A ZNR202A ZNR202C ZNR202E ZNR202F ZNR202G ZNR202H Q216 Q217...
  • Page 247 KX-TES824LA / KX-TEM824LA / 26.14.2. Bottom View C207G C207E C207C C207A C207H C207F C207D C207B C201H C201H C201D C201B C201A C201G C201E C201C Q207G Q207E Q207C Q207A Q207H Q207F Q207D Q207B Q200G Q200E Q200C Q200A Q200H Q200F Q200D Q200B Q201G...
  • Page 248 KX-TES824LA / KX-TEM824LA / 27 KX-TE82491X (MESSAGE EXTENSION CARD FOR DISA/UCD OGMs)
  • Page 249 KX-TES824LA / KX-TEM824LA / 27.1. HOW TO RECOGNIZE THAT Pb FREE SOLDER IS USED...
  • Page 250 KX-TES824LA / KX-TEM824LA / 27.2. LOCATION OF OPTIONAL CARDS 27.2.1. Message Extension Card for DISA/UCD OGMs (KX-TE82491X) Function When an optional message expansion card for DISA/UCD OGMs is added, up to 2 messages can be played simultaneously for callers and the total recording time of the PBX is increased from 3 to 6 minutes.
  • Page 251 KX-TES824LA / KX-TEM824LA / 27.3. BLOCK DIAGRAM FW PN FC S N FS C K FLASH (LC25FV411T) FS R B sanyo UF D DF D BH EN 8M SRAM LA[ 1 9] LA [16:0] LD[ 15: 0] NC S NR D...
  • Page 252 KX-TES824LA / KX-TEM824LA / 27.4. TROUBLESHOOTING GUIDE 27.4.1. PBX cannot work 27.4.2. Cannot record messages 3 minutes more...
  • Page 253 KX-TES824LA / KX-TEM824LA / 27.5. TERMINAL GUIDE OF ICS, TRANSISTORS AND DIODES 27.6. ACCESSORIES AND PACKING MATERIALS...
  • Page 254 KX-TES824LA / KX-TEM824LA / 27.7. REPLACEMENT PARTS LIST Ref. Part No. Part Name & Description Remarks (KX-TE82491X) C3FBKC000127 C3BBLG000017 Note: (CONNECTORS) CN100 K1KB60B00019 CONNECTOR, 60P 1. RTL (Retention Time Limited) (COMPONENTS PARTS) The marking (RTL) indicates that the Retention Time is...
  • Page 255 KX-TES824LA / KX-TEM824LA / 27.8. FOR THE SCHEMATIC DIAGRAM Note: 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 256 KX-TES824LA / KX-TEM824LA / 27.9. SCHEMATIC DIAGRAM (KX-TE82491X) LD[0-15] LA[1] TP36 TP11 LA[2] LD[1] TP47 TP12 LA[3] LD[2] TP35 TP13 LA[4] LD[3] TP46 TP14 LA[5] LD[4] TP34 TP15 LA[6] LD[5] TP45 TP16 LA[7] LD[6] TP33 TP17 LA[8] LD[7] TP44 TP18...
  • Page 257 KX-TES824LA / KX-TEM824LA / A[0-19],BHEN,MEM1CSN,MRDN,MWRLN D[0-15] LA[8] A[8] LA[7] A[7] +3.3VB +3.3VB CN100 LA[6] A[6] LA[5] A[5] RA5 220 +3.3VB LA[4] A[4] 2.2u 0.1u TP49 LA[3] A[3] A[7] A[8] TP75 LA[2] A[2] LA[1] A[1] A[5] TP50 A[6] TP76 RA6 220...
  • Page 258 KX-TES824LA / KX-TEM824LA / 27.10. PRINTED CIRCUIT BOARD (KX-TE82491X) 27.10.1. Component View KX-TE82491/TA82491 +3.3V PSUP1492Z* +3.3V CN100 KX-TE82491X COMPONENT VIEW...
  • Page 259 KX-TES824LA / KX-TEM824LA / 28 KX-TE82492X (2-CHANNEL VOICE MESSAGE CARD)
  • Page 260 KX-TES824LA / KX-TEM824LA / 28.1. HOW TO RECOGNIZE THAT Pb FREE SOLDER IS USED...
  • Page 261 KX-TES824LA / KX-TEM824LA / 28.2. LOCATION OF OPTIONAL CARDS 28.2.1. 2-Channel Voice Message Card (KX-TE82492X) Function Provides 60 minutes of recording time (2 channels) for messages using the Built-in Voice Message Feature. 1. Loosen the screws and open the top and bottom front covers.
  • Page 262 KX-TES824LA / KX-TEM824LA / 28.3. BLOCK DIAGRAM Lout [1] TAM1 IC12 Lin [1] Flash LA [1],NRD,NWR Memory LD [7:0] RSTN LA [4 :1 ] NACK [1] LD [7 :0 ] 74LV NDSPCS [1] LD [7 :0 ] 74LV RSTN LD [7:0 ]...
  • Page 263 KX-TES824LA / KX-TEM824LA / 28.4. CIRCUIT OPERATIONS 28.4.1. Option Card (KX-TE82492X) 28.4.1.1. Voice Record/Play Circuit Circuit Operation This card has two BV record and play circuits. DSP IC is controlled by Main Cpu. In case of recording, the voice (from CO/EXT) is through the crosspoint SW and DSP, and recorded to Memory IC.
  • Page 264 KX-TES824LA / KX-TEM824LA / 28.5. TROUBLESHOOTING GUIDE 28.5.1. PBX cannot work...
  • Page 265 KX-TES824LA / KX-TEM824LA / 28.5.2. Cannot Erase 28.5.3. Cannot Record/Playback...
  • Page 266 KX-TES824LA / KX-TEM824LA / 28.6. IC DATA 28.6.1. IC7, IC8 IC No. Pin No. Pin Name Description RSTN DSP Reset Reserve DSP Power Down Reserve Reserve Reserve Reserve Reserve LD[0] LD[1] Write data LD[2] Write data LD[3] Write data LD[4]...
  • Page 267 KX-TES824LA / KX-TEM824LA / 28.7. TERMINAL GUIDE OF ICS, TRANSISTORS AND DIODES 28.8. ACCESSORIES AND PACKING MATERIALS...
  • Page 268 KX-TES824LA / KX-TEM824LA / 28.9. REPLACEMENT PARTS LIST Ref. Part No. Part Name & Description Remarks (KX-TE82492X) C3FBMZ000002 C3FBMZ000002 Note: C2HBBK000018 C2HBBK000018 1. RTL (Retention Time Limited) C0JBAZ001852 The marking (RTL) indicates that the Retention Time is PSVISNLV273A limited for this item.
  • Page 269 KX-TES824LA / KX-TEM824LA / Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks ECUV1C104KBV ERJ3GEY0R00 ECUV1C104KBV ERJ3GEY0R00 ECUV1C104KBV ERJ3GEY0R00 ECUV1C104KBV ERJ3GEY0R00 ECUV1C104KBV ERJ3GEY0R00 ECUV1C104KBV ERJ3GEYJ222 2.2K ECUV1C104KBV ERJ3GEYJ222 2.2K ECUV1C104KBV ERJ3GEYJ102 ECUV1C104KBV ERJ3GEYJ102...
  • Page 270 KX-TES824LA / KX-TEM824LA / 28.11. SCHEMATIC DIAGRAM (KX-TE82492X) +3.3V LA[1],RSTN,nDSPCS[1-2],nRD,nWR FIL5 13.824MHz +3.3V1 0.1u TP220 R4 1M TP221 TP126 TP330 4.7k TP74 16M FLASH TP222 13.824MHz SI_1 TP315 TP91 NC15 81 DGPIO14 VCCPLL 1000p SO_1 TP316 TP92 NC16 82 DGPIO13...
  • Page 271 KX-TES824LA / KX-TEM824LA / LA[1],nDSPCS[2-1],RSTN,nRD,nWR LD[0-7] TAM CARD IC14 TP204 TP297 RSTN LD[0] TP274 1D 3 LD[0] TP275 TP298 LD[1] 2D 4 TP232 LD[2] 3D 7 (2) POWER OFF LD[1] TP276 TP299 LD[3] 4D 8 TP234 LD[4] 5D 13 TP235...
  • Page 272 KX-TES824LA / KX-TEM824LA / 28.12. PRINTED CIRCUIT BOARD (KX-TE82492X) 28.12.1. Component View PSUP1489Z* IC11 FIL4 IC14 J101 IC10 KX-TE82492X COMPONENT VIEW 28.12.2. Bottom View KX-TE82492/TA82492 TDO2 INM2 FIL6 FIL5 3.3V +1.5V IC12 IC13 KX-TE82492X BOTTOM VIEW...
  • Page 273 KX-TES824LA / KX-TEM824LA / 29 KX-TE82493X (3-PORT CALLER ID CARD)
  • Page 274 KX-TES824LA / KX-TEM824LA / 29.1. HOW TO RECOGNIZE THAT Pb FREE SOLDER IS USED...
  • Page 275 KX-TES824LA / KX-TEM824LA / 29.2. LOCATION OF OPTIONAL CARDS 29.2.1. 3-Port Caller ID Card (KX-TE82493X) Function Adds Caller ID support for 3 outside (CO) lines. 1 card can be installed for outside (CO) lines 1-3. A second card can be installed for outside (CO) lines 4-6, and a third card can be installed for outside (CO) lines 7 and 8.
  • Page 276 KX-TES824LA / KX-TEM824LA / 29.3. BLOCK DIAGRAM NRESET DTMF TOE[3:0] Receiver CID [3:1] STD[3:0] (LC73854) Q[3:0] A54SX08A LA[4 : 0] (CAT) STD[2:0] NCD[2:0] Receive Receive CID [3:1] NDR[2:0] Call ID 8E43) T88E43) DATA[2:0] (MT88E43B) Zerlink Zerlink DCLK[2:0] LD[7 : 0]...
  • Page 277 KX-TES824LA / KX-TEM824LA / 29.5. TROUBLESHOOTING GUIDE 29.5.1. Cannot Receive CALL ID Data (FSK) 29.5.2. Cannot Receive CALL ID Data (DTMF)
  • Page 278 KX-TES824LA / KX-TEM824LA / 29.6. IC DATA 29.6.1. IC8 Pin No. Pin Name Descripption NCD[0] ESK Carrier Detection Flag NCD[1] ESK Carrier Detection Flag NCD[2] ESK Carrier Detection Flag Reserve NSTD[0] Alert Signal of CID Device NSTD[1] Alert Signal of CID Device...
  • Page 279 KX-TES824LA / KX-TEM824LA / Pin No. Pin Name Descripption Reserve Reserve Reserve Reserve...
  • Page 280 KX-TES824LA / KX-TEM824LA / 29.7. TERMINAL GUIDE OF ICS, TRANSISTORS AND DIODES 29.8. ACCESSORIES AND PACKING MATERIALS...
  • Page 281 KX-TES824LA / KX-TEM824LA / 29.9. REPLACEMENT PARTS LIST Ref. Part No. Part Name & Description Remarks (KX-TE82493X) IC1A C1CB00001176 IC1B C1CB00001176 Note: IC1C C1CB00001176 IC2A PQVINJM2904V 1. RTL (Retention Time Limited) IC2B PQVINJM2904V The marking (RTL) indicates that the Retention Time is...
  • Page 282 KX-TES824LA / KX-TEM824LA / Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks C16C ECUV1H223KBV 0.022 ERJ3GEYJ221 C17A ECUV1H332KBV 0.0033 ERJ3GEYJ221 C17B ECUV1H332KBV 0.0033 R14A ERJ3GEYJ104 100K C17C ECUV1H332KBV 0.0033 R14B ERJ3GEYJ104 100K...
  • Page 283 KX-TES824LA / KX-TEM824LA / 29.10. FOR THE SCHEMATIC DIAGRAM Note: 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 284 KX-TES824LA / KX-TEM824LA / 29.11. SCHEMATIC DIAGRAM (KX-TE82493X) +3.3V C10A C13A 0.047 TP40 Caller ID (FSK) Signal IC1A TP18 1 IN+ TP43 CID[1] C20A 82KF TP11 2 IN- St/GT R19A TP30 0.1u +3.3V 3 GS R11A TP37 STD_[0] 4 VRef...
  • Page 285 KX-TES824LA / KX-TEM824LA / Call ID1 Card TP231 DATA_[0] TP76 10 DATA_0 LA[0] TP124 TP168 CID[3] TP232 TP77 DATA_[1] 18 DATA_1 LA[1] TP169 TP125 CID[2] TP233 DATA_[2] TP78 26 DATA_2 TP126 LA[2] TP170 CID[1] TP79 33 DATA_3 LA[3] +3.3V TP127...
  • Page 286 KX-TES824LA / KX-TEM824LA / 29.12. PRINTED CIRCUIT BOARD (KX-TE82493X) 29.12.1. Component View KX-TE82493/TA82493 C20C C20B C20A C21B R27B C21A R27A FIL3 IC17 R29A FIL4 C21C R29B R41 18 FIL7 IC16 IC19 R24A C14A IC2A C19A R24B IC2B R24C IC2C C14C...
  • Page 287 KX-TES824LA / KX-TEM824LA / 30 KX-A227X (BACK-UP BATTERY CABLE)
  • Page 288 KX-TES824LA / KX-TEM824LA / 30.1. ACCESSORIES AND PACKING MATERIALS...
  • Page 289 KX-TES824LA / KX-TEM824LA / 30.2. REPLACEMENT PARTS LIST (KX-A227X) 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.

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