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17 REPLACEMENT PARTS

LIST

This replacement parts list is KX-T2375MXW only.

 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 depends on
the type of assembly and the laws governing parts and
product retention. At the end of this period, the
assembly will no longer be available.

 2. Important safety notice

Components identified by the

mark indicates special

characteristics important for safety. When replacing any of
these components, only use specified manufacture´s parts.

 3. The S mark indicates service standard parts and may differ

from production parts.

 4. RESISTORS & CAPACITORS

Unless otherwise specified;

All resistors are in ohms (

) K=1000

, M=1000k

All capacitors are in MICRO FARADS (µF)P=µµF

*Type & Wattage of Resistor

17.1. Base Unit

17.1.1. CABINET AND ELECTRICAL

PARTS

Ref.

No.

Part No.

Part Name & Description

Remarks

1

PQKM10503Z1

UPPER CABINET

S

2

PQYF10525Z1

LOWER CABINET

S

3

PQBC10347Z1

BUTTON

S

4

PQBH10034Z1

BUTTON

S

5

PQBX10348Z1

BUTTON

S

6

PQAS57P03Z

SPEAKER

7

PQGD10162Z

TELEPHONE CARD

8

PQGV10039Z

TELEPHONE CARD COVER

9

PQHR10875Z

COVER

Ref.

No.

Part No.

Part Name & Description

Remarks

10

PQKK10105Z1

BATTERY COVER

S

11

PQKE10070Z3

HANGER

S

12

PQJC10044Z

BATTERY TERMINAL

13

PQJC10045Z

BATTERY TERMINAL

14

PQJC313Z

BATTERY TERMINAL

15

PQJC314Z

BATTERY TERMINAL

16

PQQT22058Z

INDICATION LABEL

17

PQSX10186Y

KEYBOARD SWITCH

18

PQSX10187Z

KEYBOARD SWITCH

19

PQGP10190Z1

PANEL

S

17.1.2. MAIN P.C.BOARD PARTS

Ref.

No.

Part No.

Part Name & Description

Remarks

PCB1

PQWPT2375MXW

MAIN P.C.BOARD ASS´Y (RTL)

(ICS)

IC1

PQVIBA8206F

IC

S

IC201

PQVINJM2904F

IC

S

IC302

PQVIPS3238NT

IC

S

IC303

PQVIPS3327UT

IC

IC304

PQVIXCF3702P

IC

IC601

PQVISC77655S

IC

S

IC801

C2CBFE000007

IC

IC903

PQVIUM66T11L

IC

S

(TRANSISTORTS)

Q1

2SD1819A

TRANSISTOR(SI)

Q101

2SA1625

TRANSISTOR(SI)

S

Q103

PQVT2N6517CA

TRANSISTOR(SI)

S

Q104

2SK1398

TRANSISTOR(SI)

S

Q107

2SD1819A

TRANSISTOR(SI)

Q108

2SC2120

TRANSISTOR(SI)

S

Q109

2SD1819A

TRANSISTOR(SI)

Q201

UN5213

TRANSISTOR(SI)

S

Q302

2SD1819A

TRANSISTOR(SI)

Q303

2SB1218A

TRANSISTOR(SI)

Q401

PQVTFB1J3P

TRANSISTOR(SI)

S

Q405

2SD1819A

TRANSISTOR(SI)

Q406

2SD1819A

TRANSISTOR(SI)

Q421

2SD1819A

TRANSISTOR(SI)

Q423

PQVTFB1A4M

TRANSISTOR(SI)

S

Q424

2SD1819A

TRANSISTOR(SI)

Q425

2SD1819A

TRANSISTOR(SI)

Q426

2SD1819A

TRANSISTOR(SI)

Q491

UN5213

TRANSISTOR(SI)

S

Q492

UN5213

TRANSISTOR(SI)

S

Q493

UN5213

TRANSISTOR(SI)

S

Q602

UN5213

TRANSISTOR(SI)

S

Q801

PQVTDTC144TU

TRANSISTOR(SI)

S

Q802

PQVTDTC144TU

TRANSISTOR(SI)

S

(DIODES)

D1

PQVDS1ZB60F1

DIODE(SI)

S

D2

MA4300

DIODE(SI)

D3

1SS119

DIODE(SI)

S

D101

PQVDS1YB60F1

DIODE(SI)

S

D102

MA111

DIODE(SI)

D103

MA111

DIODE(SI)

D104

MA4180

DIODE(SI)

D105

1SS119

DIODE(SI)

S

D106

MA4062

DIODE(SI)

D202

MA111

DIODE(SI)

D203

MA111

DIODE(SI)

D301

MA111

DIODE(SI)

D302

1SS119

DIODE(SI)

S

D304

1SS119

DIODE(SI)

S

D305

MA111

DIODE(SI)

D308

1SS119

DIODE(SI)

S

D401

MA111

DIODE(SI)

D601

1SS119

DIODE(SI)

S

D602

MA111

DIODE(SI)

D907

MA111

DIODE(SI)

LED1

PSVD1SRCT

LED

S

LED801

PSVD1SRCT

LED

S

31

KX-T2375MXW

Summary of Contents for KX-T2375MXW

Page 1: ...tric Co Ltd All rights reserved Unauthorized copying and distribution is a violation of law KX T2375MXW Integrated Telephone System White Version for Asia Middle Near East and other areas Telephone Equipment ORDER NO KM40108849C3 ...

Page 2: ...S 18 10 BLOCK DIAGRAM 19 11 BLOCK DIAGRAM IC 1 20 11 1 Communication ICs 20 12 MODULE BLOCK DIAGRAM 21 12 1 MODULE BLOCK DIAGRAM 21 12 2 CONNECTOR PIN ASSIGNMENT 21 13 CIRCUIT OPERATION 22 13 1 Bell Detector Circuit 22 13 2 Line Interface 22 13 3 Speakerphone Circuit 23 13 4 Telephone Line Interface 24 13 5 Tone Detect 25 13 6 Inializing Circuit 26 14 TROUBLE SHOOTING GUIDE 27 14 1 Service Hints 2...

Page 3: ...1 LOCATION OF CONTROLS 3 KX T2375MXW ...

Page 4: ...2 DISPLAY 4 KX T2375MXW ...

Page 5: ... device computer modem fax answering machine etc to the telephone line you can connect it through this unit using the DATA jack After connecting the handset and telephone line cord connect the communication device telephone line cord to the DATA jack Make sure the communication device is not in use before using this unit making calls storing phone numbers in memory etc or the communication device ...

Page 6: ...de You can select the dialing mode by programming If you have touch tone service set to Tone If rotary or pulse service is used set to Pulse Your phone comes from the factory set to Tone Make sure that a call is not put on hold 6 KX T2375MXW ...

Page 7: ...4 2 Time Adjustment You can select AM PM or 24 hour clock by programming Make sure that a call is not put on hold 7 KX T2375MXW ...

Page 8: ... level from 1 to 4 by programming Your phone comes from the factory set to 3 Make sure that a call is not put on hold 4 4 Selecting the Ringer Volume You can select the ringer volume to HIGH LOW or OFF Your phone comes from the factory set to HIGH 8 KX T2375MXW ...

Page 9: ...h Time The flash time depends on your telephone exchange or host PBX You can select the following flash times 80 90 100 110 200 250 300 400 600 700 ms milliseconds Your phone comes from the factory set to 600 ms Make sure that a call is not put on hold If you are connected via a PBX a longer flash time may be necessary to use PBX functions transferring a call etc Consult your PBX installer for the...

Page 10: ...l Identification Number prevents unauthorized persons from using your unit The Pin Code is required for the dial lock and call restriction to be set or canceled The factory preset Pin code is 1111 Make sure that a call is not put on hold 10 KX T2375MXW ...

Page 11: ... locked the number stored in the button can be dialed If you choose not to program emergency numbers but plan to use the dial lock any number programmed into the EMERGENCY button can be accessed 5 4 1 To Set the Dial Lock You can use the following features while the dialing buttons are locked Dialing a number you programmed into the memory of the EMERGENCY button Adjusting the handset and speakerp...

Page 12: ...eading digits cannot be dialed out 5 5 1 To Set the Call Restriction Make sure that a call is not put on hold If your unit is connected to a PBX this function may not operate Contact your PBX supplier for more information When dialing a phone number with the restricted leading digit s the dialed number will flash on the display but not dialed out 12 KX T2375MXW ...

Page 13: ...5 6 How to Release the Establishment of Dial Lock After this procedure you will be able to establish a new password How to release the establishment of dial lock 13 KX T2375MXW ...

Page 14: ...6 DISASSEMBLY INSTRUCTIONS Ref No Procedure Shown in Fig To remove Remove 1 1 1 Lower Cabinet Screws 2 6 12 A 5 2 1 2 2 Printed Circuit Board Remove the P C Board 14 KX T2375MXW ...

Page 15: ...Specific gravity 0 863 Original flux will be replaced daily 7 2 Procedure 1 Temporary fix FLAT PACKAGE IC by soldering on two marked 2 pins Most important matter is accurate setting of IC to the corresponding soldering foil 2 Apply flux for all pins of FLAT PACKAGE IC 3 Solder employing specified solder to direction of arrow as sliding the soldering iron 7 3 Modification Procedure of Bridge 1 Re s...

Page 16: ...8 CPU DATA 8 1 IC801 16 KX T2375MXW ...

Page 17: ... V Input dc supply voltage V can be powered from Tip and Ring if an ac decoupling inductor is used to prevent loading ac line signals The required V voltage is 6 0 to 11 V 7 5 V nominal at 7 0 mA 17 AGC A capacitor from this pin to VB stabilizes the speaker amp gain control loop and additionally controls the attack and decay time of this circuit The gain control loop limits the speaker amp input t...

Page 18: ...9 TERMINAL GUIDE OF IC S TRANSISTORS AND DIODES 18 KX T2375MXW ...

Page 19: ...10 BLOCK DIAGRAM KX T2375MXW 19 ...

Page 20: ...11 BLOCK DIAGRAM IC 1 11 1 Communication ICs 20 KX T2375MXW ...

Page 21: ...ULE BLOCK DIAGRAM 12 2 CONNECTOR PIN ASSIGNMENT Pin no signal Function Enable 1 VDD Power Supply 5V 2 VLCD LCD Power Input 3 VSS Power Gnd 0V 4 DATA Serial Data Input H L 5 WR Write Data H L L 6 CS Chip Selection H L H 21 KX T2375MXW ...

Page 22: ... Speaker 13 2 Line Interface In talk status L1 RLY output from pin 25 of IC801 changes to low level causing Q103 Q101 to turn on and resulting in a line loop The loop current flows from D101 Q101 Q108 R124 D106 in that order A pulse signal that repeated switches between high and low logic is output from pin 26 of the CPU This switches the line loop on and off generating the dial pulse signal 22 KX...

Page 23: ...al The Attenuator Control provides a control signal to the TX and the RX attenuator to switch the appropriate signals on and off The Attenuator Control also detects the level of the volume control to automatically adjust for changing ambient conditions 1 Transmission signal path The input signal from the microphone is sent through the circuit via the following path MIC Pin 9 of IC601 Pin 10 of IC6...

Page 24: ...urns on thus providing an off hook condition active DC current flow through the circuit and the following signal flow id for the DC loop current T POS101 D101 Q101 Q108 R124 D106 D101 R The receiving signal flows TEL line POS101 Q101 C113 R125 C108 Q109 Q405 Q406 Speaker The transmission signal flows Mic Q421 Q424 C435 R437 Q108 Pos101 Tel Line 24 KX T2375MXW ...

Page 25: ...sy tone or dial tone during Auto Redial 13 5 1 Circuit operation D101 Q101 C201 R201 R205 Pin 5 of IC201 Pin 1 of IC201 D202 R208 Q201 When the subscriber hangs up check the intermittent tone If cycle tone is detected the collector of Q201 goes to a low logic 25 KX T2375MXW ...

Page 26: ...alize the microcomputer when it incorporates batteries 13 6 2 Circuit operation When the batteries is inserted into the unit then the voltage is shifted by D304 and power is supplied to the CPU The set can operate beyond point A in the circuit voltage diagram 26 KX T2375MXW ...

Page 27: ... Q101 Q103 Q104 Can t auto redial Check IC201 Q201 No rings Check D1 IC1 and Q1 can t speak with the speakerphone Check IC601 Can t hold Check Q107 Can t speak with the handset Check handset jack Can t speak with the headset Check headset jack Can t change the volume for speakerphone Check IC801 IC601 Can t change the volume for handset Check IC801 Q405 No volume handset or speakerphone Check IC80...

Page 28: ...14 3 Tone Dialing Problems Hnadset 14 4 No Ringing Sound When Ring Signal is Input 28 KX T2375MXW ...

Page 29: ...15 CABINET AND ELECTRICAL PARTS LOCATION 29 KX T2375MXW ...

Page 30: ...16 ACCESSORY AND PACKING MATERIALS 30 KX T2375MXW ...

Page 31: ...15 PQJC314Z BATTERY TERMINAL 16 PQQT22058Z INDICATION LABEL 17 PQSX10186Y KEYBOARD SWITCH 18 PQSX10187Z KEYBOARD SWITCH 19 PQGP10190Z1 PANEL S 17 1 2 MAIN P C BOARD PARTS Ref No Part No Part Name Description Remarks PCB1 PQWPT2375MXW MAIN P C BOARD ASS Y RTL ICS IC1 PQVIBA8206F IC S IC201 PQVINJM2904F IC S IC302 PQVIPS3238NT IC S IC303 PQVIPS3327UT IC IC304 PQVIXCF3702P IC IC601 PQVISC77655S IC S ...

Page 32: ...R405 ERJ3GEYJ333 33k R406 ERJ3GEYJ335 3 3M R407 ERJ3GEYJ222 2 2k R408 ERJ3GEYJ681 680 Ref No Part No Part Name Description Remarks R409 ERJ3GEYJ223 22k R410 ERJ3GEYJ474 470k R411 ERJ3GEYJ681 680 R412 ERJ3GEYJ682 6 8k R421 ERJ3GEYJ182 1 8k R422 ERJ3GEYJ153 15k R423 ERJ3GEY0R00 0 R424 ERJ3GEYJ334 330k R425 ERJ3GEYJ225 2 2M R426 ERJ3GEYJ272 2 7k R427 ERJ3GEYJ121 120 R428 ERJ3GEYJ562 5 6k R429 ERJ3GEY...

Page 33: ...2B 0 001 C603 ECUV1H333KBV 0 033 S C605 ECUV1E223KBV 0 022 C606 ECUV1C683KBV 0 068 C607 ECUV1C273KBV 0 027 C608 ECUV1C153KBV 0 015 C609 ECUV1C104KBV 0 1 C610 ECEA1HKA010 1 C611 ECEA1HKA010 1 C612 ECEA1VKS4R7 4 7 S C613 ECUV1C683KBV 0 068 C614 ECEA1EU470 47 S C615 ECEA0JU220 22 C616 ECUV1C104KBV 0 1 C617 ECEA1CKS470 47 S C618 ECEA1VU330 33 S C619 ECEA1VKS4R7 4 7 S C620 ECUV1E183KBV 0 018 S C621 ECE...

Page 34: ...A to telephone line from the loop simulator 2 This schematic diagram may be modified at any time with the development of new technology Important Safety Notice Components identified by mark have special characteristics important for safety When replacing any of these components use only the manufacturer s specified parts 34 KX T2375MXW ...

Page 35: ...18 1 MEMO 35 KX T2375MXW ...

Page 36: ...19 SCHEMATIC DIAGRAM DTMF Hold Music Beep 5 8V 3 7V 3 7V 1 4 5 6 7 9 11 13 14 17 21 24 25 26 28 29 10 18 19 20 27 30 31 32 33 IC651 IC601 IC801 IC903 36 KX T2375MXW ...

Page 37: ...Set Headset Set Outgoing Signal The voltage during ON Hook is indicated shows the voltage during OFF Hook KX T2375MXW SCHEMATIC DIAGRAM Battery Low 3 8V 3 9V 5 7V 4 2V 5 8V 4 5V 6 3V 3 7V 3 7V 6 3V 1 4 5 6 7 9 11 13 14 17 21 24 25 26 28 29 10 18 19 20 27 30 31 32 33 IC201 IC1 IC304 IC302 IC303 37 KX T2375MXW ...

Page 38: ...38 KX T2375MXW ...

Page 39: ...41 KX T2375MXW K KXT2375MXW Printed in Japan ...

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