KX-TG2340JXS / KX-TGA236JXS Note: Because CONTENTS 4 to 9 are the extracts from the Operating Instructions of this model, they are subject to change without notice. Please refer to the original Operating Instructions for further information. CONTENTS Page Page 1 ABOUT LEAD FREE SOLDER (PbF: Pb free) 12 TROUBLESHOOTING GUIDE 1.1.
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KX-TG2340JXS / KX-TGA236JXS 17.7. Parallel Connection Detect Circuit 26 CABINET AND ELECTRICAL PARTS (Handset) 17.8. Calling Line Identification (Caller ID) 27 ACCESSORIES AND PACKING MATERIALS 18 BLOCK DIAGRAM (Handset) 28 TERMINAL GUIDE OF THE ICエS, TRANSISTORS AND DIODES 19 CIRCUIT OPERATION (Handset) 19.1.
KX-TG2340JXS / KX-TGA236JXS 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).
KX-TG2340JXS / KX-TGA236JXS 1.2. How to recognize that Pb Free solder is used (Example: Handset P.C.B.) IC201 IC901 IC202 Marked (Component View) Note: The location of the “PbF” mark is subject to change without notice.
KX-TG2340JXS / KX-TGA236JXS 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. 3. Use a conductive mat on the worktable.
KX-TG2340JXS / KX-TGA236JXS 4 BATTERY 4.1. Standard Battery Life 4.1.1. Battery Charge 4.1.2. Battery Strength 4.1.3. Recharge Note for service: The battery strength may not be indicated correctly if the battery is disconnected and connected again, even after it is fully...
KX-TG2340JXS / KX-TGA236JXS 12.1. Check Power Cross Reference: Note: Power Supply Circuit (P.65) DSP is IC501. Reset Circuit (P.67) 12.2. Error Message Table Symptom Remedy Blinking The initialization was tried, but it could not be done. 1. Check the peripheral circuit of Flash Memory visually.
KX-TG2340JXS / KX-TGA236JXS 12.7. Check the RF Part 12.7.1. Finding Out the Defective Part After All the Checkings or Repairing Re-register Handset (to be checked) to Base Unit (to be checked) and HS to BU Regular unit (working). 12.7.1.1. Re-registering a Handset...
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KX-TG2340JXS / KX-TGA236JXS 12.7.2. RF Check Flowchart Each item (1a ~5) of RF Check Flowchart corresponds to Check Table for RF part. Please refer to the each item. Cross Reference: Check Table for RF part (P.43)
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KX-TG2340JXS / KX-TGA236JXS 12.7.3. Check Table for RF part Item BU checking HS checking 1a Link confirmation Normal 1. Re-resister HS Regular Unit (working) to BU. 1. Re-resister HS to BU of Regular Unit (working). 2. Press [Talk] key of the HS Regular Unit to 2.
KX-TG2340JXS / KX-TGA236JXS 12.8. Check Handset Transmission Cross Reference: SIGNAL ROUTE (P.76). 12.9. Check Handset Reception Cross Reference: SIGNAL ROUTE (P.76). Note: When checking the RF UNIT, Refer to Check the RF Part (P.41) 12.10. Check Caller ID Cross Reference: Telephone Line Interface (P.68).
KX-TG2340JXS / KX-TGA236JXS 13.2. Test Mode Flow Chart for Handset 13.2.1. TX Burst Mode...
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KX-TG2340JXS / KX-TGA236JXS 13.2.2. RX-CW TEST Mode...
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KX-TG2340JXS / KX-TGA236JXS 13.2.3. Test Link Mode Note: (*1) LCD displays the Channel number. (exception: default/ CH00 = 1ch.)
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KX-TG2340JXS / KX-TGA236JXS 13.2.4. Adjustment flow (X’tal mode and Batt Low mode) Cross Reference (*1) Adjust Battery Low Detector Voltage (Handset) (P.53) Note: (*2) These are the default values. (*3) These values may not be fixed depending on the battery strength.
KX-TG2340JXS / KX-TGA236JXS 13.3. X801 (Base Unit), X201 (Handset) Check Equipment: Frequency counter Check Point for measurement: BCK Checking tolerance: 13.824MHz ± 100Hz 13.3.1. Check and Adjust X801 (Base Unit) Frequency 1. Set up Base Unit in TEST mode. 2. Press following keys in order to Adjust Crystal mode. [INTERCOM], [INTERCOM], [INTERCOM], [1] or [2], [2], [2], [1] * Check BCK frequency.
KX-TG2340JXS / KX-TGA236JXS 13.8. How to Clear User Setting The operation reset the unit to Factory setting. (Erase recording Voice messages, Stored phone numbers, Caller list and etc.) This operation should not be performed for a usual repair. 13.8.1. Base unit 13.8.2.
KX-TG2340JXS / KX-TGA236JXS 14 DESCRIPTION 14.1. Frequency The frequency range of 2400MHz~2480MHz is used. Transmitting and receiving channel between base unit and handset is same frequency. Refer to the Frequency Table. 14.2. FHSS (Frequency Hopping Spread Spectrum) This telephone is using an IC chip which has similar specification to WDCT (World Digital Cordless Telephone) and is the cordless telephone system that can use multiple portable unit simultaneously.
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KX-TG2340JXS / KX-TGA236JXS 14.2.1. TDD Frame Format 14.2.2. TDMA system This system is the cycles of 10ms, and has four duplex paths, so it is possible to perform four duplex communications simultaneously. In 1 slot 1.25ms, the 10ms of voice data is transmitted.
KX-TG2340JXS / KX-TGA236JXS 14.3. Signal Flowchart in the Whole System Reception CN101 of the base unit is connected to the TEL line, and signal is entered through the bridge diode D101. While talking, the relay (Q104) is turned ON and amplified at the Q150, then led to DSP (IC501). The DSP encodes ADPCM and TDD/TDMA with FHSS to TX-DATA.
KX-TG2340JXS / KX-TGA236JXS 17 CIRCUIT OPERATION (Base Unit) General Description: (DSP, Flash Memory) is a digital 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.
KX-TG2340JXS / KX-TGA236JXS 17.1.2. The Meaning of the Motion of Pin 128 · The period of Host Power Up (Hardware Initialization) In this period, the host sets up some registers in order to wake up the system. · The period of Host Reset (Software Initialization) In this period, the host reads the parameter from the memory and initializes module.
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KX-TG2340JXS / KX-TGA236JXS 17.3.1. Charge Circuit The voltage from the AC is supplied to the charge circuits. Normal charge of maximum 6-hours is started soon after the Handset is placed on the base unit. Then it changes to Trickle charge to prevent from overcharging.
KX-TG2340JXS / KX-TGA236JXS 17.4. Reset Circuit Function: This circuit is used to initialize the microcomputer when it incorporates an AC adaptor. Circuit Operation: When the AC Adaptor is inserted into the unit, then the voltage is shifted by IC300 and power is supplied to the DSP.
KX-TG2340JXS / KX-TGA236JXS 17.5. Locator/Intercom Mode 1. Press the base LOCATOR/INTERCOM button, then a beep is output from pins 35 and 37 of IC501, and blinks on the SP- PHONE LED (LED 721) is caused by pin 15 of IC501.
KX-TG2340JXS / KX-TGA236JXS 17.7. Parallel Connection Detect Circuit Function: In order to disable call waiting and stutter tone functions when using telephones connected in parallel, it is necessary to have a circuit that judges whether a telephone connected in parallel is in use or not. This circuit determines whether the telephone connected in parallel is on hook or off hook by detecting changes in the T/R voltage.
KX-TG2340JXS / KX-TGA236JXS 17.8. Calling Line Identification (Caller ID) Function: The caller ID is a chargeable ID which the user of a telephone circuit obtains by entering a contract with the telephone company to utilize a caller ID service. For this reason, the operation of this circuit assumes that a caller ID service contract has been entered for the circuit being used.
KX-TG2340JXS / KX-TGA236JXS 19 CIRCUIT OPERATION (Handset) 19.1. Construction The circuit mainly consists of DSP and RF unit as shown in the block diagram. 19.1.1. DSP:IC201 19.1.1.1. Function · Battery Low, Power down defect circuit · Ringer Generation · Interface circuit RF unit, speaker, mic, LED, Key scan, LCD, Headset 19.1.1.2.
KX-TG2340JXS / KX-TGA236JXS 19.3. Charge Circuit When the handset is put on the cradle of the Base unit, the power is supplied from CHARGE2 and CHARGE1 terminals to charge the battery via D205 (D207), R268, Q212. The voltage between CHARGE2 and CHARGE1 flows D213 -> R248 -> Q207 ->...
KX-TG2340JXS / KX-TGA236JXS 19.5. Sending Signal The voice signal from the microphone input to DSP (42-43). CN203 is the headset jack. When the headphone is connected, the Q206 detect it. The input from the microphone of the handset (MIN, MIP) is cut and the microphone signal from the headset is input to DSP (39).
KX-TG2340JXS / KX-TGA236JXS Note: Description High High_Z 125 VCC · The mark “*” in the I/O column means the port is 126 NC controlled by the firmware. 127 FLASH_SCK High Middle · Data in the blank columns are omitted because of the...
KX-TG2340JXS / KX-TGA236JXS 24 HOW TO REPLACE THE FLAT PACKAGE IC Even if you do not have the special tools (for example, a spot heater) to remove the Flat IC, with some solder (large amount), a soldering iron and a cutter knife, you can easily remove the ICs that have more than 100 pins.
KX-TG2340JXS / KX-TGA236JXS 24.3. FLAT PACKAGE IC INSTALLATION PROCEDURE 1. Temporarily fix the FLAT PACKAGE IC, soldering the two marked pins. *Check the accuracy of the IC setting with the corresponding soldering foil. 2. Apply flux to all pins of the FLAT PACKAGE IC.
KX-TG2340JXS / KX-TGA236JXS Ref. Part No. Part Name & Description Remarks 29.2. Handset C510 F1G1A1040003 29.2.1. Cabinet and Electrical Parts C511 F1G1A1040003 C512 F1G1A1040003 Ref. Part No. Part Name & Description Remarks C553 F1G1A1040003 C554 F1G1A1040003 PQGG10254Z1 GRILLE, LCD ABS-HB...
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KX-TG2340JXS / KX-TGA236JXS Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks D217 MA8047 DIODE(SI) R268 ERJ3GEYJ102 D218 MA8047 DIODE(SI) R269 ERJ3GEYJ102 D219 MA8047 DIODE(SI) R270 ERJ3GEYJ102 D220 MA8047 DIODE(SI) R275 ERJ2GEJ104 100K...
KX-TG2340JXS / KX-TGA236JXS 30 FOR SCHEMATIC DIAGRAM 30.1. Base Unit (SCHEMATIC DIAGRAM (Base Unit)) Notes: 1. DC voltage measurements are taken with voltmeter from the negative voltage line. 2. This schematic diagram may be modified at any time with the development of new technology.