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Panasonic KX-T7730X, Service Manual

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Panasonic KX-T7730X Service Manual Download Page 24

10.3.  FLAT PACKAGE IC INSTALLATION PROCEDURE

 1. Temporary fix FLAT PACKAGE IC by soldering on two marked pins.

*Check the accuracy of the IC setting with the corresponding soldering foil.

 2. Apply flux for all pins of FLAT PACKAGE IC.

 3. Solder using the specified solder, in the direction of the arrow, by sliding the soldering iron.

10.4. BRIDGE MODIFICATION PROCEDURE

 1. Lightly re-solder the bridged portion.

 2. Remove the remaining solder along pins using a soldering iron as shown in the figure below.

24

KX-T7730X

Summary of Contents for KX-T7730X

Page 1: ...u Matsushita Electric Co Ltd All rights reserved Unauthorized copying and distribution is a violation of law KX T7730X for Asia Middle Near East Africa and Latin America PROPRIETARY TELEPHONE ORDER NO KMS0110592C3 ...

Page 2: ... SPEAKER PHONE DOES NOT WORK 21 8 6 THE ELECTRONIC VOLUME OF HANDSET DOES NOT WORK 21 9 TERMINAL GUIDE OF ICS TRANSISTORS AND DIODES 22 10 HOW TO REPLACE THE FLAT PACKAGE IC 23 10 1 PREPARATION 23 10 2 FLAT PACKAGE IC REMOVE PROCEDURE 23 10 3 FLAT PACKAGE IC INSTALLATION PROCEDURE 24 10 4 BRIDGE MODIFICATION PROCEDURE 24 11 CABINET AND ELECTRICAL PARTS LOCATION 25 12 ACCESSORIES AND PACKING MATERI...

Page 3: ...m of the unit 1 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 4 Do not touch IC or LSI pins with bare fingers 3 KX T7730X ...

Page 4: ...2 LOCATION OF CONTROLS 4 KX T7730X ...

Page 5: ...3 CONNECTION Caution Ensure the cord is inserted in the groove to prevent damage to the connector 5 KX T7730X ...

Page 6: ...4 DISASSEMBLY INSTRUCTIONS 1 Remove the Stand 2 Remove 4 Screws A 3 Remove the Bottom Cabinet 4 Remove the Connector 1 3 and the Flat Cable from the Main Board 6 KX T7730X ...

Page 7: ...move 2 Screws A 6 Remove the Main Board from the Top Cabinet 7 Remove the Cable from the Main Board 8 Remove the LCD Holder by sliding the Hook in the direction of the arrow from the Main Board 7 KX T7730X ...

Page 8: ...14 D5 I O O HF power on CS 15 D9 I O I HOLD Key L Key press 16 D10 I O O DO 17 D11 I O O DCLR 18 D12 I I DI 19 D13 I I DI_INT 20 R00 I O I KEY IN0 21 R01 I O I KEY IN1 22 R02 I O I KEY IN2 23 R03 I O I KEY IN3 24 R10 I O I KEY IN4 25 R11 I O I KEY IN5 26 R12 I O I KEY IN6 27 R13 I O I Hook SW 28 R20 I O O KEY LED COM0 29 R21 I O O KEY LED COM1 30 R22 I O O KEY LED COM2 31 R23 I O O KEY LED COM3 32...

Page 9: ...6 47 R73 I O O LED7 48 R80 I O O HF SP vol 1 49 R81 I O O HF SP vol 2 50 R82 I O O HF SP vol 3 51 R83 I O O HF SP vol 4 52 R90 I O O Tone cont 1 53 R91 I O O Tone cont 2 54 R92 I O O Tone cont 3 55 R93 I O O Tone cont 4 56 RA0 I O O HS SP vol 1 57 RA1 I O O HS SP vol 2 58 SEL I I A Four minute Cycle Vcc Connection 59 VCC 60 TONC O O DTMF Column 61 TONR O O DTMF Row 62 VTref DTMF Standard Power 63 ...

Page 10: ... CIRCUIT Q101 SIGNAL RECEIVING CIRCUIT Q102 FF IC2 RESET IC IC9 Vcc CPU IC1 X1 DRIVING CIRCUIT Q103 Q104 LED LCD KEY LCD Module RINGER DTMF SPEAKER MIC HEADSET HANDSET SP PHONE IC3 Handset Amp Q5 Q8 Pre Amp Q4 HYBRID CIRCUIT Q3 DIODE BRIDGE D1 DIODE BRIDGE D2 T1 KX T7730X MAIN BOARD KX T7730X 10 ...

Page 11: ...L CIRCUIT Sequential input information is executed by dynamic scanning The ports R20 R23 R30 R31 of IC1 are brought to high status consecutively If a key is pressed the key in information input is executed by ports R00 R03 R10 R13 11 KX T7730X ...

Page 12: ...7 2 LED CIRCUIT Circuit Operation The LED executes dynamic lighting for the status indicators and control is executed by the output ports R20 R23 R60 R63 R70 R73 12 KX T7730X ...

Page 13: ... proprietary telephone receives an IRQ signal from the PBX and after sending the key input information 19 pulses to the PBX and receiving data 47 pulses for the LED control etc the proprietary telephone will return to the PBX an acknowledge signal 1 Reception The data from the PBX is received via the H and L lines along the path shown below H L Line D2 T2 R106 Q102 IC2 IC1 Pin 18 2 Transmission Th...

Page 14: ...tput of a single row tone the row terminal and the each column terminals intersecting with it are required to be brought a low state For a dual tone output one row terminal and one column terminal are brought to low state CONDITION IC1 pin52 IC5 SWA IC1 pin53 IC5 SWB IC1 pin54 IC5 SWC IC1 pin55 IC5 SWD Ringing L OFF L OFF L OFF H ON Call Waiting L OFF L OFF H ON L OFF Tone Dial Handset H ON H ON L...

Page 15: ...the following path Handset MIC JK2 JK3 C24 R26 C34 Q5 C21 R21 Q3 C4 T1 C3 Q1 D1 Telephone Line 2 Reception Signal Path The input signal from the telephone line is sent to the receiver through the following path Telephone Line D1 Q1 C3 T1 C4 Q3 R10 C8 R12 Q4 C26 R32 IC10 C32 R34 C27 R208 Q8 C31 JK3 JK2 Handset Speaker 15 KX T7730X ...

Page 16: ... volume control to automatically adjust the volume for changing ambient conditions 1 Control Signal Path Control signal for transmission and reception are input to IC3 via the following path Transmission Control Signal Path MIC CN2 IC3 Pin 9 IC3 Pin 10 IC3 Pin 3 IC3 Pin 4 IC3 Pin 5 Reception Control Signal Path Telephone Line Q3 Q4 IC3 Pin 7 2 Transmission Reception Switching The comparison result...

Page 17: ...17 KX T7730X ...

Page 18: ...8 TROUBLESHOOTING GUIDE 8 1 NO OPERATION 18 KX T7730X ...

Page 19: ...8 2 HANDSET TROUBLE 19 KX T7730X ...

Page 20: ...8 3 SPEAKER PHONE TROUBLE 8 4 TONE DIAL TORUBLE 20 KX T7730X ...

Page 21: ...8 5 THE ELECTRONIC VOLUME OF THE SPEAKER PHONE DOES NOT WORK 8 6 THE ELECTRONIC VOLUME OF HANDSET DOES NOT WORK 21 KX T7730X ...

Page 22: ...9 TERMINAL GUIDE OF ICS TRANSISTORS AND DIODES 22 KX T7730X ...

Page 23: ...e replaced daily 10 2 FLAT PACKAGE IC REMOVE PROCEDURE 1 When all of the IC lead can not been seen at the standard degree fill with large quantities of solder Note If you do not fill with solder and directly cut the IC lead with the cutter stress may build up directly in the P C board s pattern If you do not fill with large quantities of solder as in step 1 the P C board pattern may be removed 2 U...

Page 24: ...he corresponding soldering foil 2 Apply flux for all pins of FLAT PACKAGE IC 3 Solder using the specified solder in the direction of the arrow by sliding the soldering iron 10 4 BRIDGE MODIFICATION PROCEDURE 1 Lightly re solder the bridged portion 2 Remove the remaining solder along pins using a soldering iron as shown in the figure below 24 KX T7730X ...

Page 25: ...11 CABINET AND ELECTRICAL PARTS LOCATION 25 KX T7730X ...

Page 26: ...12 ACCESSORIES AND PACKING MATERIALS 26 KX T7730X ...

Page 27: ...H1007Z1 BUTTON HOOK PC ABS 94HB 11 PSHG1122Z RUBBER PARTS MIC COVER 12 RJM142Z MIC 13 PSBX1102Z1 BUTTON SP PHONE ABS 94HB 14 PSBX1103Z1 BUTTON DIAL ABS 94HB 15 PSBX1101Z1 BUTTON FUNCTION ABS 94HB 16 PSBX1100Z1 BUTTON CO ABS 94HB 17 PSBC1032Z1 BUTTON CURSOR ABS 94HB 18 PSSX1022Z KEYBOARD SWITCH 19 PSBD1013Z1 KNOB MODE ABS 94HB 20 PSJE1028Z FLAT CABLE 21 PSJS02P10Z CONNECTOR 22 PSYF1041Y1 BOTTOM CAB...

Page 28: ...NNECTOR 9P COMPONENTS COMBINATION RA1 D1H84734A024 RESISTOR ARRAY RA2 D1H84724A024 RESISTOR ARRAY CAPACITORS C2 PSCEV1CA100S 10 S C3 ECEV1CA220 22 C4 PQCUV1A225ZF 2 2 Ref No Part No Part Name Description Remarks C6 ECUV1H102KBV 0 001 C7 ECUV1H821KBV 820p C8 ECUV1C224KBV 0 22 C9 ECEV0JA101 100 C12 ECUV1H222KBV 0 0022 C14 ECUV1C473KBV 0 047 C21 ECUV1C104KBV 0 1 C22 ECUV1H103KBV 0 01 C23 ECUV1H153KBV...

Page 29: ...J3R3 3 3 R57 ERJ3GEYJ222 2 2k R58 ERJ3GEYJ104 100k R59 ERJ3GEYJ123 12k R60 ERJ3GEYJ152 1 5k Ref No Part No Part Name Description Remarks R61 ERJ3GEY0R00 0 R67 ERJ3GEYJ224 220k R68 ERJ3GEYJ124 120k R69 ERJ3GEYJ563 56k R70 ERJ3GEYJ273 27k R71 ERJ3GEYJ473 47k R72 ERJ3GEYJ473 47k R73 ERJ3GEYJ104 100k R74 ERJ3GEYJ562 5 6k R76 ERJ3GEYJ683 68k R77 ERJ3GEYJ393 39k R78 ERJ3GEYJ473 47k R79 ERJ3GEYJ393 39k R...

Page 30: ...scription Remarks PHOTO ELECTRIC TRANSDUCER PC1 0N3181 PHOTO COUPLER SWITCH SW1 PSSS3A101Z SWITCH TRANSFORMERS T1 G5A1A0000003 TRANSFORMER T2 PSLT9Z4A TRANSFORMER CRYSTAL OSCILLATOR X1 H0J400400011 CRYSTAL OSCILLATOR 30 KX T7730X ...

Page 31: ...C 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 31 KX T7730X ...

Page 32: ... AG AG AG AG AG AG AG NC J2 NC J3 IC5 3 4 5 JK3 1 2 3 4 5 AG AG D16 MUTE D17 STORE D14 CONF D15 FWD DND D13 SP PHONE SW31 MUTE SW30 FWD DND SW35 M W SW32 STORE SW29 CONF SW37 FLASH SW36 PAUSE SW47 SW48 SW44 ICM SW41 REDIAL SW38 TRANSFER SW43 SP PHONE SW49 SW50 JK2 HANDSET JACK 3 SP 1 MIC 2 4 A1 A2 A3 A4 A5 A6 A7 A8 A9 B1 B2 B3 B4 B5 B6 B7 B8 E4 E3 E2 E1 E5 E6 G2 G1 AG1 M3 AG2 SP SP SW51 PROGRAM SW...

Page 33: ... DG R126 560 Q109 1 4 3 2 5 R127 2 2K DG R125 2 2K R128 10K IC9 RESET 1 Vin 2 GND 4 NC 3 R6 680 C4 2 2 C41 0 1 A5V C85 Z0 01 IC5 7 14 C25 4 7 R39 47K R40 47K DG DG DG AG AG AG AG AG AG AG AG AG AG AG AG AG AG AG AG AG AG DG H T R L C34 0 1 CN1 DATA RW 6 STB RS 4 SCK E 5 Vdd 2 Vo 3 Vss 1 DB7 10 DB6 9 DB5 8 DB4 7 NC C11 NC C10 AG R123 0 R124 0 IC7 1 I 3 O 2 B D5 D5V 6V 6 3V100 C205 C204 Z0 1 6 3V100...

Page 34: ...41 R9 R17 R6 C7 C3 D1 R1 R B8 B7 B6 T L H JK1 B4 C11 R3 R2 R5 Q103 Q109 R99 D3 C95 C1 IC6 1 4 5 8 IC1 48 K2 49 64 33 32 E6 17 16 1 Q104 R131 R132 R133 R134 R135 R136 Q108 Q107 Q106 Q105 R152 R127 R126 Q20 PC1 R24 R101 D2 C101 R102 R23 C24 R74 J2 J3 SP2 Q6 Q12 R40 C85 C81 C203 C205 C206 C204 Q101 IC2 R104 R108 C105 C109 R121 R155 X1 C107 R154 R103 R105 R201 R89 R78 C54 C53 R83 R56 C74 R65 R62 R63 C...

Page 35: ... SW32 SW16 R90 SW1 HIGH LOW OFF SW22 SW40 SW34 SW28 FWD DND SW36 SW38 PAUSE TRANSFER AUTO DIAL AUTO ANS MUTE STORE FLASH SW51 PROGRAM SW35 SW13 SW14 SW17 SW18 SW19 SW20 SW23 SW24 SW25 SW26 MESSAGE 1 4 SW15 SW33 CN8 1 9 SW41 7 SW21 SW39 SW42 SW45 8 SW27 9 0 HOLD REDIAL SP PHONE 5 6 SW46 2 3 SW43 D13 D11 SW49 SW47 SW50 SW48 4 3 2 1 KX T7730X MAIN BOARD BOTTOM VIEW PSUP1382Z 35 KX T7730X A KXT7730X ...

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