KX-DT543/KX-DT543-B/KX-DT546/KX-DT546-B 1 Safety Precautions 1. Before servicing, unplug the AC power cord to prevent an electric shock. 2. When replacing parts, use only the manufacturer's recommended components. 3. Check the condition of the power cord. Replace if wear or damage is evident.
KX-DT543/KX-DT543-B/KX-DT546/KX-DT546-B 2 Warning 2.1. About Lead Free Solder (PbF: Pb free) Note: In the information below, Pb, the symbol for lead in the periodic table of elements, will refer to standard solder or solder that 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-DT543/KX-DT543-B/KX-DT546/KX-DT546-B 4.2. Circuit Operations 4.2.1. LCD Circuit LCD data are output from pin 66 of IC410 to LCD module. LCD contrast is set by electronic volume in LCD module. VCC33 (+3.3V) of the power supply voltage is pressurized about four/three times in the LCD module and used as LCD driving volt- age (approx.
KX-DT543/KX-DT543-B/KX-DT546/KX-DT546-B 4.2.3. Data Communication Function The data communication circuit serves the following functions: Information exchanger between PBX and proprietary telephone, key input information as well as data for the LED control, LCD control, voice data, etc. This information is continuously exchanged at all times.
KX-DT543/KX-DT543-B/KX-DT546/KX-DT546-B 4.2.4. DXDP Communication Function: This circuit performs the same type of communication as between the DPT and PBX, but a slave DPT for DXDP is connected to the DXDP port. In addition, it controls power feeding for a slave DPT.
KX-DT543/KX-DT543-B/KX-DT546/KX-DT546-B 4.2.5. Analog Circuit 1. Speaker phone call Transmitting signal is input from microphone input to IC410-pin 33 and 34 amplified by a built-in analog amplifier of IC410 A/D conversion, Gain adjustment and echo cancel by a built-in DSP of IC410.
KX-DT543/KX-DT543-B/KX-DT546/KX-DT546-B 3. Headset Call Transmitting signal is input from headset microphone input to IC410-pin 26 amplified by a built-in analog amplifier of IC410 A/D conversion, Gain adjustment and echo cancel by a built-in DSP of IC410. Receiving signal is sent by data from PBX Gain adjustment and D/A conversion by a built-in DSP of IC410 amplified by a built-in analog amplifier of IC410 ...
KX-DT543/KX-DT543-B/KX-DT546/KX-DT546-B 4.2.7. ASIC (IC150) IC150 controls KEY, LED, EHS and Headset-detect. An operation clock is provided from IC300. IC410 controls reset signal (L(0V): Reset) for IC150. IC150 and IC410 are connected via I2C interface. IC410 checks the presence of IC150 by getting the signal from IC150.
KX-DT543/KX-DT543-B/KX-DT546/KX-DT546-B 4.2.8. Key Circuit The key detection is under the matrix control by IC150. The HOOK key is independent from Key Scan Matrix and taken into the port singularly. KEY Input control timing chart KEYIN pins have a internal pull-down resistor.
KX-DT543/KX-DT543-B/KX-DT546/KX-DT546-B 4.2.9. LED Circuit The lighting of the LEDs is controlled by IC150. Ringer LEDs are static lighting system. Other LEDs light up in a dynamic lighting system. The duty ratio is 1/10 (ON time 1.28ms).
KX-DT543/KX-DT543-B/KX-DT546/KX-DT546-B LED dynamic control timing chart LED lights with 3.3V created by the STB pin of the High output and Transistor Collector pin of the Low output. 12.6ms 0.1ms 1.28ms LED_STB2 Q110C CO3(Red) lighting Q111C CO5(Red) lighting Q112C CO10(Red) lighting...
Connections Note • When connecting a headset The following headsets can be used with this unit. (Not all operations with the headsets can be guaranteed.) - Wired headsets Panasonic RP-TCA400 or KX-TCA430 - EHS headsets ® Selected Plantronics -brand headsets For up-to-date information about headsets that have been tested with this unit, please contact your dealer.
KX-DT543/KX-DT543-B/KX-DT546/KX-DT546-B 7 Test Mode 7.1. Function Test Mode 7.1.1. Preparation Preparation device • Unit for Test phone • PBX (including DLC or DHLC) Set up unit in test mode by key control 1. Connect DLC or DHLC (power on) while pressing "1","*" and "CONF" keys at the same time.
KX-DT543/KX-DT543-B/KX-DT546/KX-DT546-B 8 Troubleshooting Guide 8.1. No Operation [ Power supply circuit ] Remove L221(VDD33), L220(VCCA33) and L222(VCC33) from Main PCB. Disconnect Operation PCB from Main PCB. Connect DPT to PBX. Check the soldering. Resolder or replace parts as needed. Confirm the voltage between Pin + and Pin - of Related parts: JK300,L301,L302,T300,D300, C550.
KX-DT543/KX-DT543-B/KX-DT546/KX-DT546-B [ DCX81(IC410) ] Boot ROM Error into IC410 (No.2) Check the TEST POINT(ST0-ST3). See Table-1. See Table-2 (P.23). Is it "NOT Error (No.1)" ? [ Flash ROM(IC401) ] Flash ROM(IC401) Data Error / DSP Data Error (No.3,4,6,7) See Table-3 (P.24).
KX-DT543/KX-DT543-B/KX-DT546/KX-DT546-B Table-1: PORT OUTPUT at ERROR The error result is output to a port of IC410 at error. Check the Test Point ST3,ST2,ST1 and ST0. See below for the output contents. Test Point Error Item Related Points LCD Error Message.
KX-DT543/KX-DT543-B/KX-DT546/KX-DT546-B Table-2 : Boot ROM Error IC410 Check the soldering. Resolder or replace parts as needed. Confirm the voltage at Pin 19 of IC410 (VCC33). Related parts: L222 Is it about 3.3V? Related parts: L410,C413,C406,C407, Confirm the voltage at TP:1.2V.
KX-DT543/KX-DT543-B/KX-DT546/KX-DT546-B Table-3 : Flash ROM(IC401) Data Error / DSP Data Error Check the soldering. Resolder or replace parts as needed. Confirm the voltage at Pin 8 of IC401 (VCC33) and Pin 106 of IC410. Related parts: C400,C559,IC401,IC410,L222 Are they about 3.3V? Confirm the frequency of clock signal at Pin 6 of IC401.
KX-DT543/KX-DT543-B/KX-DT546/KX-DT546-B Table-4 : ASIC2(IC150) Data Error Check the soldering. Resolder or replace parts as needed. Related parts: [Main PCB] CN400 Confirm the voltage at Pin 3 of IC150 (Ope PCB). [Ope PCB] CN160,D160,C160,C161,C154 Is it about 3.3V? C156 Flat Cable (Between Main PCB and Ope PCB)
KX-DT543/KX-DT543-B/KX-DT546/KX-DT546-B 8.2. ASIC1(IC300) Does Not Operate Check the soldering. Resolder or replace parts as needed. Confirm the voltage at Pin19,30 and 43 of Related parts: C323,C327,C324,C328,C326, IC300 (VCC33). C329, L222 Is it about 3.3V? Confirm the frequency of clock signal at Pin 39 of IC300.
KX-DT543/KX-DT543-B/KX-DT546/KX-DT546-B 8.3. LCD Does Not Operate Check the soldering. Resolder or replace parts as needed. Confirm the voltage at Pin7 of CN460. Related parts: CN460,D460,C460-462,C464 Is it about 3.3V? Confirm the voltage between Pin 12 and Pin 13 of CN460.
KX-DT543/KX-DT543-B/KX-DT546/KX-DT546-B 8.4. DXDP Does Not Work Connect DPT to DXDP port. Check the soldering. Resolder or replace parts as needed. Confirm the voltage at Pin 4 of Q332 (VDD33). Related parts: L221 Is it about 3.3V? Related parts: Q330,R345,R346,R347,C331, Confirm the voltage between TP:H-D and TP:L-D.
KX-DT543/KX-DT543-B/KX-DT546/KX-DT546-B 8.5. Audio Problem Check the soldering. Resolder or replace parts as needed. Confirm the voltage at Pin 31 and Pin 39 of Related parts: R427,C418,C419,C421,C455, IC410 (VCCA33). R557,C420,C453,L220 Is it about 3.3V? Handset problem ? See 8.6 Headset problem ? See 8.7...
KX-DT543/KX-DT543-B/KX-DT546/KX-DT546-B 8.6.2. Send Check the soldering. Resolder or replace parts as needed. Confirm the voltage between Pin 6 of IC150 and AG. Related parts: IC150,R161,L163,D163,JK160 Is it about 2.3V? Confirm the voltage between either end of C443 (MICBIAS). Related parts: IC410,C442,R238,C443 Is it about 2.5V?
KX-DT543/KX-DT543-B/KX-DT546/KX-DT546-B 8.7. Headset Does Not Work 8.7.1. Receive Check the soldering. Resolder or replace parts as needed. Insert a headset Confirm the waveform of dial tone at Related parts: IC410,C577,L462 TP:HESSPOUT when you press the speaker button. Can you see the waveform of dial tone?
KX-DT543/KX-DT543-B/KX-DT546/KX-DT546-B 8.7.2. Send Insert a headset Check the soldering. Resolder or replace parts as needed. Confirm the voltage between either end of C443 (MICBIAS). Related parts: IC410,C442,R238,C443 Is it about 2.5V? Related parts: Confirm the voltage between TP:HESMIN and [Main PCB] CN400,L461,C576,R566,R569, TP:UART_GND.
KX-DT543/KX-DT543-B/KX-DT546/KX-DT546-B 8.8. Speaker-Phone/Ringer Does Not Work 8.8.1. Receive / Ringer Check the soldering. Resolder or replace parts as needed. Confirm the waveform of dial tone between TP:SPP Related parts: IC410,C500,C501,R501,R502, and TP:SPN, when you press the speaker button. (Speaker-phone mode).
KX-DT543/KX-DT543-B/KX-DT546/KX-DT546-B 8.9. LED Does Not Light Check the soldering. Resolder or replace parts as needed. Does SP-PHONE_LED light? Related parts: IC150,D139,R101,R111,Q117, cR200, and Jumper hip Does RINGER LED(RED) light? Related parts: IC150,R108,D109, and Jumper chip Related parts: IIC150,R109,D108,Q104,R110, Does RINGER LED(GREEN) light?
KX-DT543/KX-DT543-B/KX-DT546/KX-DT546-B 8.10. EHS Does Not Work 8.10.1. EHS (Plantronics) Does Not Work Check the soldering. Resolder or replace parts as needed. Mesure the EHSDET voltage at Pin 7 of IC150. Related parts: R181,IC171,R177,Q170,R175, Is it 0V? D171,D172,JK302, and Jumper chip...
KX-DT543/KX-DT543-B/KX-DT546/KX-DT546-B 8.10.2. EHS (Jabra) Does Not Work Check the soldering. Resolder or replace parts as needed. Mesure the EHSDET voltage at Pin 7 of IC150. Related parts: R181,IC171,R177,Q170,R175, Is it 0V? D171,D172,JK302, and Jumper chip Measure the JABRA_UTX signal between Pin 1 Related parts: [Main PCB] R453,R433,IC410 Pin 4 of JK302.
KX-DT543/KX-DT543-B/KX-DT546/KX-DT546-B 6. Remove 2 Screws (A). 7. Remove the Main Board. 8. Remove 2 Screws (A). 9. Remove the PCB Holder. 10. Remove 5 Screws (A). 11. Remove the Ope Board. 9.2. Remove and Assembly for LCD Please note the tab when LCD is resolved and assembled.
KX-DT543/KX-DT543-B/KX-DT546/KX-DT546-B 9.3. Assembly for Lead wire Perform this process in reverse when taking the unit apart. **LEAD WIEW STYLING** WIRE （ORANGE） WIRE （BLUE） PCB HOLDER **LFW-SOLDER、 PART STICKING** The connector is surely inserted up to the White modle only A : Confirm that LEAD WIRE does not root and locked.
KX-DT543/KX-DT543-B/KX-DT546/KX-DT546-B Note: Cable is to be inserted into connector CN460,CN400,CN160 without any inclining, as shown. <NG> <OK>...
KX-DT543/KX-DT543-B/KX-DT546/KX-DT546-B 10.2. How To Replace a Flat Package IC Even if you do not have the special tools (for example, a spot heater) to remove the Flat IC, with some solder (large amount), a sol- dering iron and a cutter knife, you can easily remove the ICs that have more than 100 pins.
KX-DT543/KX-DT543-B/KX-DT546/KX-DT546-B 11.4.3. No.(11)-(12) (11) DPT - PBX signal (Receiving signals) 28pin(PVRH) of IC300 27pin(PDR) of IC300 Between "H" and "L" 26pin(PVRL) of IC300 Receiving signals from PBX (12) DPT - PBX signal (Transmitting signals) 32pin(PDX1) of IC300 Between "H" and "L"...
KX-DT543/KX-DT543-B/KX-DT546/KX-DT546-B 11.4.5. No.(16)-(17) (16) DXDP signal (Receiving signals) 23pin(DVRH) of IC300 22pin(DDR) Between "HD" and "LD" of IC300 21pin(DVRL) of IC300 Receiving signals from DXDP (17) DXDP signal (Transmitting signals) 47pin(DDX0) of IC300 Between "HD" and "LD" 3pin of Q332...
KX-DT543/KX-DT543-B/KX-DT546/KX-DT546-B 11.4.6. No.(18)-(21) (18) EHSTX signal (19) EHSRX signal 8pin(EHS_RX) of IC150 Between 3pin and 4pin of JK302 (20) JABRA_UTX signal Between 1pin and 4pin of JK302 (21) JABRA_URX signal 10pin of IC410 10pin(JABRA_URX) on Main PCB of CN160...
KX-DT543/KX-DT543-B/KX-DT546/KX-DT546-B 13 Appendix Information of Schematic Diagram Note: 1. DC voltage measurements are taken with an oscilloscope or a tester with a ground. 1. The schematic diagrams and circuit board may be modified at any time with the development of new technology.
KX-DT543/KX-DT543-B/KX-DT546/KX-DT546-B 14 Exploded View and Replacement Parts List 14.1. IC Data 14.1.1. IC410 28 DCIN2 QSCLK 29 DCIN3/LIN1 30 LEDSINK1/PWM1 QVCC 31 VREF 32 VCCA QCSN0 33 MIN QCSN1/EXGPIO0 34 MIP GPIO25/XD4 35 HSMIN GPIO24/XD5 36 HSMIP GPIO23/XD6 37 MPWR...
KX-DT543/KX-DT543-B/KX-DT546/KX-DT546-B Pin No. Terminal Name Function I/O Setting Contents of Control Remarks HSMIN HSMICINN Handset Mic negative input HSMIP HSMICINP Handset Mic positive input MPWR (MICBIAS) Mic power output Pull-up to MICBIAS at 390Ω SPOUTP Hands free Speaker positive output...
KX-DT543/KX-DT543-B/KX-DT546/KX-DT546-B Pin No. Terminal Name Function I/O Setting Contents of Control Remarks GPIO18 (SPI_CLK) LCD Serial clock LCD control port GPIO19 (SPI_CS0) LCD Chip select LCD control port GPIO20 Not in use GPIO22 Not in use GPIO23 Receive data from Jabra / Software down-...
KX-DT543/KX-DT543-B/KX-DT546/KX-DT546-B IC150 14.1.3. Pin No. Terminal Name Function I/O Setting Contents of Control Remarks CLKIN CK4M System clock input from IC300 (2MHz) CLKOUT GIN08 HOOK Switch Input VDD1 3.3V Digital system power supply (+3.3V) VSS1 Digital system ground Not in use...
KX-DT543/KX-DT543-B/KX-DT546/KX-DT546-B 14.4. Replacement Parts List 1. RTL (Retention Time Limited) Safety Ref. Part No. Part Name & Description Remarks Note: PNBH1012Z2 HOOK BUTTON(WHITE) The “RTL” marking indicates that its Retention Time is PNUS1126Z SPRING HOOK BUTTON Limited. PNBC1500Y1 CURSOR KEY(WHITE)
KX-DT543/KX-DT543-B/KX-DT546/KX-DT546-B Safety Ref. Part No. Part Name & Description Remarks Safety Ref. Part No. Part Name & Description Remarks PNBX1104Z2 CO KEY RIGHT_WHITE IC401 There is no parts supply of PNBX1110Z1 CO KEY LEFT_BLACK only IC. Please order PCB1. PNBX1110Z2...
KX-DT543/KX-DT543-B/KX-DT546/KX-DT546-B Safety Ref. Part No. Part Name & Description Remarks Safety Ref. Part No. Part Name & Description Remarks C416 ECUE1A104KBQ C581 ECUE1H102KBQ 0.001 C418 ECUE1C104KBQ C419 ECUE1C104KBQ (RESISTORS) C420 ECUE1C104KBQ L220 ERJ3GEY0R00 C421 F1J0J2260002 L221 ERJ3GEY0R00 C422 ECUE1A104KBQ L222...