Panasonic KX-T7636 Service Manual
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Panasonic KX-T7636 Service Manual

Panasonic KX-T7636 Service Manual

Digital proprietary telephone
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ORDER NO. KMS0308803C1
F19
Digital Proprietary Telephone
KX-T7636 / KX-T7636-B
White version
Black version
(for U.S.A.)
2003 Panasonic Communications Co., Ltd. All rights reserved.
Unauthorized copying and distribution is a violation of law.
IMPORTANT INFORMATION ABOUT LEAD FREE, (PbF),

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  • Page 1 ORDER NO. KMS0308803C1 Digital Proprietary Telephone KX-T7636 / KX-T7636-B White version Black version (for U.S.A.) 2003 Panasonic Communications Co., Ltd. All rights reserved. Unauthorized copying and distribution is a violation of law. IMPORTANT INFORMATION ABOUT LEAD FREE, (PbF),...

  • Page 2: About Lead Free Solder (Pbf: Pb Free)

    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.

  • Page 3: For Service Technicians

    1.1. SUGGESTED PbF SOLDER There are several types of PbF solder available commercially. While this product is manufactured using Tin, Silver, and Copper, (Sn+Ag+Cu), you can also use Tin and Copper, (Sn +Cu), or Tin, Zinc, and Bismuth, (Sn+Zn+Bi). Please check the manufacturer’s specific instructions for the melting points of their products and any precautions for using their product with other materials.

  • Page 4: Location Of Controls

    4. LOCATION OF CONTROLS...
  • Page 5 5. CONNECTION Caution: Consult your dealer for more details about XDP. 6. DISASSEMBLY INSTRUCTIONS...

  • Page 6: How To Replace A Flat Package Ic

    1. Remove 9 Screws (A). 2. Remove the Bottom Cabinet. 3. Remove the P. C. Board from the Top Cabinet. 7. HOW TO REPLACE A FLAT PACKAGE IC 7.1. PREPARATION - PbF (: Pb free) Solder - Soldering Iron...
  • Page 7 Tip Temperature of 700°F ± 20°F (370°C ± 10°C) Note: We recommend a 30 to 40 Watt soldering iron. An expert may be able to use a 60 to 80 Watt iron where someone with less experience could overheat and damage the PCB foil. - Flux Recommended Flux: Specific Gravity 0.82.

  • Page 8: Troubleshooting Guide

    7.3. REMOVING SOLDER FROM BETWEEN PINS 1. Add a small amount of solder to the bridged pins. 2. With a hot iron, use a sweeping motion along the flat part of the pin to draw the solder from between the adjacent pads. 8.

  • Page 9: Lcd Does Not Operate

    Note: Refer to (1)~(5) of WAVEFORM () for waveform. 8.2. LCD DOES NOT OPERATE...

  • Page 10: Handset Does Not Work

    Note: Refer to (6) of WAVEFORM () for waveform. 8.3. HANDSET DOES NOT WORK Receive Send...
  • Page 11 Note: Refer to (7)~(8) of WAVEFORM () for waveform. 8.4. HEADSET DOES NOT WORK Receive Send Note:...

  • Page 12: Speaker-Phone Trouble

    Refer to (7)~(8) of WAVEFORM () for waveform. 8.5. SPEAKER-PHONE TROUBLE Receive Send Note: Refer to (7)~(8) of WAVEFORM () for waveform. 8.6. DXDP-DPT DOES NOT WORK...

  • Page 13: Key Input Control Circuit

    Note: Refer to (9) of WAVEFORM () for waveform. 8.7. OPTION DOES NOT WORK 9. BLOCK DIAGRAM 10. CIRCUIT OPERATIONS 10.1. KEY INPUT CONTROL CIRCUIT The key data is under the matrix control by 19 to 23, 25, 44, 45(KEYOUT) and 28 to 35(KEYIN) of IC3.

  • Page 14: Lcd Circuit

    10.2. LCD CIRCUIT LCD data are outputted from pin 57, 58, 59,10 and 12 of IC3 to LCD module. IC8 is an inverter for a charge pump circuit which outputs the voltage necessary for LCD driving. - 4.5V from -1.2V generated at IC8 as a reference to +3.3V of the power supply voltage is pressurized four times in the LCD module and used as LCD driving voltage (approx.
  • Page 15 Pin 62 of IC3 L KX-T7636 24 digits * 6 lines H KX-T7630/KX- 24 digits * 3 lines T7633 The lighting of the backlight is controlled by Q1. - IC3-pin 56 H Q1-ON Backlight ON - IC3-pin 56 L Q1-OFF...

  • Page 16: Led Circuit

    10.3. LED CIRCUIT The lighting of the LED is controlled by pin 19 to 28 (Row) and pin 11 to 16 (Colum) of IC5. The LED lights up in a dynamic lighting system. The duty ratio is 1/8 (ON time 1.5ms). Only D107 of LED for CO7 lights up in a static lighting system.

  • Page 17: Reset Circuit

    10.4. RESET CIRCUIT Reset Signal is outputted from IC1 and inputted into IC3 and IC5 at the connection of TEL cord.

  • Page 18: Power Supply Circuit

    10.5. POWER SUPPLY CIRCUIT This circuit converts the voltage supplied from PBX into the power supply voltage of +3.3V by IC6 (Switching Regulator IC). IC10 controls the power supply circuit as below to turn IC6 on in low consumption current at starting up.

  • Page 19: Data Communication

    10.6. 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. Circuit Operation The data received from PBX is inputted to the comparator (pin 68) built in IC5 through Pulse Trans T1.

  • Page 20: Dxdp Communication

    10.7. DXDP COMMUNICATION Function This circuit performs the same communication as DXDP-compatible DPT and PBX communication connected with DXDP port. Circuit Operation The data to Slave DPT is outputted from pin 63 and 64 of IC5 and sent by Transistor Q8 and Q9. The data from Slave DPT is inputted to the comparator (pin 61) built in IC5.

  • Page 21: Analog Circuit

    10.8. OPTION DETECTION When the option is connected with CN3 and CN10, IC3 detects the option connection by the following voltages. - IC3-pin 63 : 3.3V No option connection with CN3 and CN10 - IC3-pin 63 : 2.1V Option connection with CN3 only - IC3-pin 63 : 1.7V Option connection with CN10 only - IC3-pin 63 : 1.3V...
  • Page 22 (IC3-pin 52 H : Headset Call) Receiving signal inputted from PBX is Gain adjustment by DSP of IC5 D/A conversion after the input to IC4 in PCM data built-in Amp output outputted from IC5 built-in Amp to handset. 2. Headset Call Transmitting signal is inputted from headset microphone and amplified by IC4 built-in Amp A/D conversion...
  • Page 23 11. IC DATA 11.1. IC5 I/O Setting Pull-up Contents of Control Remark Processing Built-in Write signal Built-in Read signal Built-in Chip select input INTN Interrupt output PVSS Ground for DSP PLL PVDD Power supply for DSP PLL DSP PLL adjustment PLLI DSP PLL adjustment PLLO...
  • Page 24 I/O Setting Pull-up Contents of Control Remark Processing NROW4 LED row drive 4 NROW3 LED row drive 3 NROW2 LED row drive 2 NROW1 LED row drive 1 NROW0 LED row drive 0 Digital power supply Channel pulse 2.048MHz serial data output Built-in 2.048MHz serial data input OSYNC...
  • Page 25 I/O Setting Pull-up Contents of Control Remark Processing DVRL Reference voltage for comparator (For DXDP) Receive data input (For DXDP) DVRH Reference voltage for comparator (For DXDP) DDX0 Send data output (For DXDP) DDX1 Send data output (For DXDP) Digital ground Digital power supply PVRL Reference voltage for...
  • Page 26 I/O Setting Pull-up Contents of Control Remark Processing Built-in Data 3 Built-in Data 2 Built-in Data 1 Built-in Data 0 Digital ground 100 RSTN Reset input(Schmitt) 11.2. IC3 I/O Setting Pull-up Contents of Control Remark Processing not in use Connecting to Vcc not in use Open OSC2...
  • Page 27 I/O Setting Pull-up Contents of Control Remark Processing P16/IRQ2 Built-in GA_RxINT/ Low active P15/IRQ1 Built-in KEYOUT0 Built-in KEYOUT1 P13/TMIG Built-in KEYOUT2 P12/TMOFH Built-in KEYOUT3 P11/TMOFL Built-in KEYOUT4 P10/TMOW Chrystal drive pulse of LCD Timer output125KHz (out) KEYOUT5 REN/ Low active WEN/ Low active P50/WKP0...

  • Page 28: Terminal Guide Of Ics, Transistors And Diodes

    I/O Setting Pull-up Contents of Control Remark Processing LCD_DT_CMD/(AO) For data/command selecting TONED not in use not in use VTref not in use not in use PB7/AN7 (out) Model distinction 2(A/D) H:30/33, L:36 PB6/AN6 (out) Option detection CVcc Internal electrical power Connecting 0.1 source to GND...

  • Page 29: Accessories And Packing Materials

    14. ACCESSORIES AND PACKING MATERIALS...

  • Page 30: Replacement Parts List

    15. REPLACEMENT PARTS LIST 1. RTL (Retention Time Limited) Note: 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. The retention period of availability is dependent on the type of assembly, and in accordance with the laws governing parts and...

  • Page 31: Cabinet And Electrical Parts

    product retention. After the end of this period, the assembly will no longer be available. 2. Important safety notice Components identified by mark have special characteristics important for safety. When replacing any of these components, use only manufacture's specified parts. 3.
  • Page 32 Ref. No. Part No. Part Name & Description Remarks PSKM1083Z1 CABINET BODY ABS-HB (for KX-T7636) PSKM1083Z2 CABINET BODY ABS-HB (for KX-T7636-B) PSHR1251Z TRANSPARENT PLATE (LARGE) PSGD1061Z TEL. CARD (LARGE) PQHR576Z TRANSPARENT PLATE (SMALL) PQHP532X TEL. CARD (SMALL) PQKE10070Z3 LID, HOOK KNOB...
  • Page 33 Part Name & Description Remarks PSJE1030Z LEAD WIRE PSJE1032Z LEAD WIRE PSHR1236Z GUIDE POM-HB PSKF1054Z1 LOWER CABINET COVER ABS-HB (for KX-T7636) PSKF1054Z2 LOWER CABINET COVER ABS-HB (for KX-T7636-B) PSKK1039Z1 LID, CONNECTOR COVER ABS-HB (for KX-T7636) PSKK1039Z2 LID, CONNECTOR COVER ABS-HB...
  • Page 34 Ref. No. Part No. Part Name & Description Remarks PSJA1068Z CORD, TELEPHONE PSJA1084Z CORD, HANDSET (for KX-T7636) PSJA1084X CORD, HANDSET (for KX-T7636-B) PQJX2PS409Z HANDSET (for KX-T7636) PQJX2PKA409Z HANDSET (for KX-T7636-B) PSQX2607Z INSTRUCTION BOOK (QUICK REFERENCE GUIDE) PSQW1843Z LEAFLET PSZKT7636M GIFT BOX ASS'Y...
  • Page 35 Ref. No. Part No. Part Name & Description Remarks (DIODES) 1SS355 DIODE(SI) 1SS355 DIODE(SI) 1SS355 DIODE(SI) B0JCMG000007 DIODE(SI) PQVDS1ZB60F1 DIODE(SI) 1SS355 DIODE(SI) D101 PQVDBRPY1204 LED D102 PQVDBRPY1204 LED D103 PQVDBRPY1204 LED D104 PQVDBRPY1204 LED D105 PQVDBRPY1204 LED D106 PQVDBRPY1204 LED D107 PQVDBRPY1204 LED D108...
  • Page 36 Ref. No. Part No. Part Name & Description Remarks CN12 K1MN04B00052 CONNECTOR, 4 PIN CN13 PSJP04A05Z CONNECTOR, 4 PIN (JACKS) PSJJ1T012Z JACK, HANDSET PSJJ1T019Z JACK, HYBRID IP-PBX PSJJ1T011Z JACK, TELEPHONE LINE PQJJ1C002Z JACK, HEADSET (CERAMIC FILTERS) PFVF1B601ST CERAMIC FILTER PFVF1B601ST CERAMIC FILTER PFVF1B601ST CERAMIC FILTER...
  • Page 37 Ref. No. Part No. Part Name & Description Remarks ERJ3GEYJ473 ERJ3GEYJ103 ERJ3GEYJ183 ERJ3GEYJ223 ERJ3GEYJ333 ERJ3GEYJ333 ERJ3GEYJ224 220k ERJ3GEYJ564 560k ERJ3GEYJ333 ERJ3GEYJ333 ERJ3GEYJ102 ERJ3GEYJ333 ERJ3GEYJ221 ERJ3GEYJ473 ERJ3GEYJ473 ERJ3GEYJ473 ERJ3GEYJ393 ERJ3GEYJ562 5.6k ERJ3GEYJ473 ERJ3GEYJ221 ERJ3GEYJ103 ERJ3GEYJ181 ERJ3GEYJ102 ERJ3GEYJ102 ERJ3GEYJ102 ERJ3GEYJ471 ERJ3GEYJ471 ERJ3GEYJ471 ERJ3GEY0R00 ERJ3GEYJ122 1.2k...
  • Page 38 Ref. No. Part No. Part Name & Description Remarks ERJ3GEYJ220 ERJ3GEYJ472 4.7k ERJ3GEYJ101 ERJ3GEYJ101 ERJ3GEYJ122 1.2k ERJ3GEYJ122 1.2k ERJ3GEYJ271 ERJ3GEYJ822 8.2k ERJ3GEYJ123 ERJ3GEYJ272 2.7k ERJ3GEYJ122 1.2k ERJ3GEYJ561 ERJ3GEYJ331 ERJ3GEYJ180 ERJ3GEYJ561 ERJ3GEYJ331 ERJ3GEYJ270 ERJ3GEYJ562 5.6k ERJ3GEYJ180 R100 ERJ3GEYJ330 R101 ERJ3GEYJ100 R102 ERJ3GEYJ223 R103 ERJ3GEYJ681...
  • Page 39 Ref. No. Part No. Part Name & Description Remarks PQCUV1H105JC 1 PQCUV1H105JC 1 PQCUV1C105ZF 1 ECUV1C104ZFV 0.1 PQCUV1A475ZF 4.7 ECUV1C104ZFV 0.1 ECUV1C104ZFV 0.1 ECUV1C104ZFV 0.1 ECUV1H103KBV 0.01 ECUV1H103KBV 0.01 ECUV1C104ZFV 0.1 ECUV1H103KBV 0.01 ECUV1H102KBV 0.001 ECUV1H102KBV 0.001 ECUV1C104ZFV 0.1 ECUV1C104ZFV 0.1 ECUV1C104ZFV 0.1 ECUV1H103KBV 0.01 ECUV1H103KBV 0.01...
  • Page 40 Ref. No. Part No. Part Name & Description Remarks ECUV1H102KBV 0.001 ECUV1H102KBV 0.001 ECUV1C104ZFV 0.1 ECUV1H120JCV 12P ECUV1H120JCV 12P ECUV1C104ZFV 0.1 ECUV1C104ZFV 0.1 ECUV1C104ZFV 0.1 ECUV1C104ZFV 0.1 ECUV1C104ZFV 0.1 ECUV1C104ZFV 0.1 PQCUV1H105JC 1 PQCUV1H105JC 1 EEEFK0J101P ECUV1H102KBV 0.001 ECUV1H102KBV 0.001 EEEFK0J101P ECUV1C104ZFV 0.1 ECUV1H101JCV 100P...

  • Page 41: For The Schematic Diagram

    Ref. No. Part No. Part Name & Description Remarks C148 ECUV1H331JCV 330P C149 ECUV1H331JCV 330P 16. 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 42 Marked PbF PSUP1376Z-C CN12 R106 R104 C131 CN11 C140 C129 -1.2V D3.3V VOUT C145 R112 R111 R114 R100 R133 C101 R6 R25 C118 C110 C106 Q11 Q12 C103 C107 MIC1 C144 R130 C100 C109 R124 R109 R129 C134 C116 A3.3V R33R32 C42 C41 SP3-...
  • Page 43 +3.3V CO1~24(2color) CONNECTOR Function LED 8 CN11-CN12 EEPROM 128bit HOOK Function LED 1 D133 CONNECTOR CONNECTOR CN8-CN9 KEYIN8-1 Function Key KEYOUT8-1 Message Function Key 46 D130-132 KEYIN6-1 SCLK,TxD,RxD,TxEN,RxRDY,BUSY,OPDET KEYOUT8-7 OSX,OSR,OSYNC,OCK2M,RESETOUT MAIN P. C. Board KX-T7636 / KX-T7636-B : BLOCK DIAGRAM...
  • Page 44 ANALOG CIRCUIT PCM RX DATA HANDSET RX HANDSET TX PCM TX DATA HEADSET RX HEADSET TX SP PHONE RX SPOP HS2SP SP PHONE TX MIC2 SPON HS2MIC C108 R120 R126 C112 A3.3V R125 A3.3V A3.3V C147 R121 R124 AVDD A3.3V VFR0 VFTP1 R128...
  • Page 45 D3.3V D3.3V C129 D3.3V Z0.1 D3.3V R131 LCD_RES LCD_CS LCD_A0 D3.3V LCD_SCK LCD_DATA MODELCOAD Z0.01 Z0.01 (2)(3) (4) (5) (6) (7) (8)(9)(10)(11) (13) (15) (17) (19) (20) (21) (12) (14) (16) (18) KX-T7636 / KX-T7636-B MAIN AND SUB BOARDS (1/4)
  • Page 46 SPPHONE REDIAL D10 MODELCOAD2 SW109 SW110 SW111 SW112 SW113 SW114 SW115 SW116 SW147 SW148 SW149 SW150 KEYOUT1 CO19 CO20 CO21 CO22 CO23 CO24 SW101 SW102 SW103 SW104 SW105 SW106 SW107 SW108 KEYOUT0 KX-T7636 / KX-T7636-B MAIN AND SUB BOARDS (2/4)
  • Page 47 Z0.01 C102 Z0.22 D3.3V 7 CS C105 R102 R133 D3.3V Z0.01 8 OUT 330u A3.3V 2.7K C107 A3.3V2 R127 Z0.1 50V33u 6.3V100u A3.3V C106 1.2K 50V Z0.1 6.3V100u OPDET (22)(23) (24) (25) KX-T7636 / KX-T7636-B MAIN AND SUB BOARDS (3/4)
  • Page 48 OSYNC R109 OSYNC CLM1 R110 OCK2M OCK2M CLM0 CN10 D3.3V D107 Z0.1 OSYNC OSYNC OCK2M OCK2M SCLK SCLK TO USB OPTION TxEN TxEN RESETOUT2 RESETOUT2 Z0.01 RxRDY RxRDY BUSY BUSY OPDET OPDET KX-T7636 / KX-T7636-B MAIN AND SUB BOARDS (4/4)
  • Page 49 Pin8 of IC3 and Pin100 of IC5 Reset signal D3.3V Pin8 of IC3 and Pin100 of IC5 Pin80 of IC5 16.384MHz Pin5 of IC3 8.196MHz...
  • Page 50 Pin4 of T1 Communication waveform 1 receive data from PBX send data to PBX Between H and L Communication waveform 2 receive data from PBX send data to PBX Pin1 to 5 of CN1 Communication waveform Pin1 of CN1 Pin3 of CN1 Pin4 of CN1 Pin5 of CN1...
  • Page 51 Pin11 of IC4 Communication waveform about "receive" Pin8 of IC4 Pin9 of IC4 Pin11 of IC4 Pin52 of IC5 Communication waveform about "send" Pin8 of IC4 Pin9 of IC4 Pin52 of IC5 Pin61 of IC5 Communication waveform send data to DPT of DXDP receive data from DPT of DXDP...
  • Page 52 R124 R109 R129 C134 C116 A3.3V R33R32 C42 C41 SP3- C125 C141 C142 PSUP1376Z-A SP3+ C122 C136 C124 R125 33/36 30 C36 MIC2 R126 MIC3 C113 C146 CN10 PSUP1376Z-D KX-T7636 / KX-T7636-B : MAIN and SUB BOARDS : COMPONENT VIEW...
  • Page 53 SW126 SW124 SW103 CO18 SW132 SW116 SW141 SW133 SW125 CO17 SW131 SW115 SW130 SW117 SW109 SW101 SW114 CO15 SW129 SW113 CO14 SW118 SW110 SW102 SW128 SW112 CO13 SW127 SW111 KX-T7636 / KX-T7636-B : MAIN and SUB BOARDS : BOTTOM VIEW...

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Kx-t7636-b

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