Panasonic KX-TG6431M Expandable Digital Cordless Answering System Instruction Manual

: June 16, 2024
: Panasonic

KX-TG6431M Expandable Digital Cordless Answering System

Product Information

Specifications:

Model No.: KX-TG6431M, KX-TG6431T, KX-TGA641M, KX-TGA641T
Color: Metallic Gray (M), Black Metallic (T)
Type: Expandable Digital Cordless Answering System

Location of Controls and Components:

4.1. Controls

4.1.1. Base Unit

The base unit of the telephone equipment contains the necessary
controls and components for operation.

4.1.2. Handset

The handset of the telephone equipment contains the necessary
controls and components for operation.

Installation Instructions:

5.1. Connections

Follow the provided instructions to make the necessary
connections for proper installation.

5.2. Battery

5.2.1. Battery Installation

Insert the supplied Panasonic Ni-MH battery into the handset
following the provided instructions.

5.2.2. Battery Charge

Charge the battery fully before initial use.

Operating Instructions:

6.1. Programmable Settings

6.1.1. Programming by Scrolling through the Display Menus

Access the programming options by scrolling through the display
menus and follow the instructions to customize the settings.

6.1.2. Programming using the Direct Commands

Use the direct commands to program specific settings without
going through the display menus.

Error Messages and Troubleshooting:

Refer to the provided troubleshooting guide for information on
error messages and solutions to common issues.

Schematic Diagram:

For service technicians, refer to the schematic diagram section
for detailed technical information on the base unit and
handset.

FAQ:

Q: How do I install the battery?

A: Follow the instructions in section 5.2.1 for battery
installation.

Q: How long does it take to charge the battery?

A: Charge the battery fully before initial use as mentioned in
section 5.2.2.

ORDER NO. KM40812782CE F22
Telephone Equipment
Model No. KX-TG6431M KX-TG6431T KX-TGA641M KX-TGA641T
Expandable Digital Cordless Answering System
M: Metallic Gray Version T: Black Metallic Version (for U.S.A.)
© Panasonic Communications Co., Ltd. 2009. Unauthorized copying and distribution is a violation of law.

KX-TG6431M/KX-TG6431T/KX-TGA641M/KX-TGA641T
2

TABLE OF CONTENTS
PAGE 1 Safety Precautions———————————————– 4
1.1. For Service Technicians ——————————— 4 2 Warning ————————————————————– 4
2.1. Battery Caution——————————————— 4 3 Specifications —————————————————– 5 4 Location of Controls and Components ——————- 6
4.1. Controls —————————————————— 6 4.2. Display ——————————————————- 7 5 Installation Instructions —————————————- 8 5.1. Connections————————————————- 8 5.2. Battery——————————————————– 8 6 Operating Instructions—————————————–10 6.1. Programmable Settings ———————————10 6.2. Error Messages ——————————————-14 6.3. Troubleshooting ——————————————-15 7 Schematic Diagram ———————————————19 7.1. For Schematic Diagram———————————19 7.2. Schematic Diagram (Base Unit_Main) ————–20 7.3. Schematic Diagram (Base Unit_RF Part) ———-22 7.4. Schematic Diagram (Base Unit_Operation) ——-24 7.5. Schematic Diagram (Handset_Main) —————-26 7.6. Schematic Diagram (Handset_RF Part) ————28 8 Exploded View and Replacement Parts List ———–30

KX-TG6431M/KX-TG6431T/KX-TGA641M/KX-TGA641T

3

KX-TG6431M/KX-TG6431T/KX-TGA641M/KX-TGA641T
1 Safety Precautions
1.1. For Service Technicians
· Repair service shall be provided in accordance with repair technology information such as service manual so as to prevent fires, injury or electric shock, which can be caused by improper repair work. 1. When repair services are provided, neither the products nor their parts or members shall be remodeled. 2. If a lead wire assembly is supplied as a repair part, the lead wire assembly shall be replaced. 3. FASTON terminals shall be plugged straight in and unplugged straight out.
· ICs and LSIs are vulnerable to static electricity. When repairing, the following precautions will help prevent recurring malfunctions. 1. Cover plastic parts boxes with aluminum foil. 2. Ground the soldering irons. 3. Use a conductive mat on worktable. 4. Do not grasp IC or LSI pins with bare fingers.
2 Warning
2.1. Battery Caution
Risk of explosion if battery is replaced by an incorrect type. Dispose of used batteries according to the instructions.
4

3 Specifications

KX-TG6431M/KX-TG6431T/KX-TGA641M/KX-TGA641T

Note: · Design and specifications are subject to change without notice.
Note for Service: · Operation range: Up to 300 m outdoors, Up to 50 m indoors, depending on the condition. · Analog telephone connection: Telephone Line · Optional headset: KX-TCA60, KX-TCA86, KX-TCA92, KX-TCA93, KX-TCA94
5

KX-TG6431M/KX-TG6431T/KX-TGA641M/KX-TGA641T
4 Location of Controls and Components

4.1. Controls
4.1.1. Base Unit

4.1.2. Handset

6

4.2. Display

KX-TG6431M/KX-TG6431T/KX-TGA641M/KX-TGA641T

7

KX-TG6431M/KX-TG6431T/KX-TGA641M/KX-TGA641T
5 Installation Instructions
5.1. Connections

5.2. Battery
5.2.1. Battery Installation

8

5.2.2. Battery Charge

5.2.4.

KX-TG6431M/KX-TG6431T/KX-TGA641M/KX-TGA641T
Panasonic Ni-MH Battery Performance (supplied batteries)

Note for service: The battery strength may not be indicated correctly if the battery is disconnected and connected again, even after it is fully charged. In that case, by recharging the battery as mentioned above, you will get a correct indication of the battery strength.
5.2.3. Battery Level

9

KX-TG6431M/KX-TG6431T/KX-TGA641M/KX-TGA641T
6 Operating Instructions
6.1. Programmable Settings
6.1.1. Programming by Scrolling through the Display Menus
10

KX-TG6431M/KX-TG6431T/KX-TGA641M/KX-TGA641T
11

KX-TG6431M/KX-TG6431T/KX-TGA641M/KX-TGA641T
6.1.2. Programming using the Direct Commands
12

KX-TG6431M/KX-TG6431T/KX-TGA641M/KX-TGA641T
13

KX-TG6431M/KX-TG6431T/KX-TGA641M/KX-TGA641T
6.2. Error Messages
14

6.3. Troubleshooting

KX-TG6431M/KX-TG6431T/KX-TGA641M/KX-TGA641T

15

KX-TG6431M/KX-TG6431T/KX-TGA641M/KX-TGA641T
16

KX-TG6431M/KX-TG6431T/KX-TGA641M/KX-TGA641T
17

KX-TG6431M/KX-TG6431T/KX-TGA641M/KX-TGA641T
18

7 Schematic Diagram
7.1. For Schematic Diagram
7.1.1. Base Unit (Schematic Diagram (Base Unit_Main)) 7.1.1.1. Acoustic Testing Mode

KX-TG6431M/KX-TG6431T/KX-TGA641M/KX-TGA641T

Notes: 1. DC voltage measurements are taken with voltmeter from the negative voltage line.

2. The schematic diagrams may be modified at any time with the development of new technology.
7.1.2. Handset (Schematic Diagram (Handset_Main))
Notes: 1. DC voltage measurements are taken with an oscilloscope or a tester with a ground. 2. The schematic diagrams may be modified at any time with the development of new technology.

19

KX-TG6431M/KX-TG6431T/KX-TGA641M/KX-TGA641T
7.2. Schematic Diagram (Base Unit_Main)

V_PA V_RF

RF Interface
V_PA (VPA) V_RF

V_PA

3.0V

L382 NC

C383 1u C382 NC

BCLK SYN_OUT
SYN_EN SYN_CLK SYN_DATA SLOT_CTRL RADIO_EN RX_DATA TX_DATA RF_RSTN
DVCC ANT1 ANT2
GND

BCLK SYN_OUT SYN_EN SYN_CLK SYN_DATA SLOT_CTRL RADIO_EN RX_DATA TX_DATA RF_RSTN
DVCC ANT1
ANT2
GND

BCLK

3.0V
C521

R521 NC 0.1u SYN_OUT

SYN_EN

SYN_CLK

SYN_DATA

SLOT_CTRL

TXO

RADIO_EN RXI RX_DATA
TX_DATA

RF_RSTN

ANT1-H ANT2-H

ANT1
3.3V
ANT2

ANT2_GND ANT1_GND

23
FLASH

C605 NC C604 NC

IC601

1 SI 2 SCK 3 RESET 4 CS

SO 8 GND 7 VCC 6 *WP 5

16M FLASH R602 NC

R603 NC

C611 NC

IC611
1 A0 2 A1 3 A2 4 VSS

VCC 8 WP 7 SCL 6 SDA 5

NC

C612 NC
EEPROM

R612 NC R611 NC

C603 NC C601 0.1u

DVCC C501 0.1u
P15
45 C503 0.1u INT0

GND2 26
VCC1 27
SYN_EN 28
SYN_CLK 29
SYN_DATA 30
NC8 31
NC9 32
FCCP15 33
RX_DATA 34
NC10 35
NC11 36
NC12 37
RF_RSTN 38
NC13 39
NC14 40
NC15 41
EROM_DATA 42
EROM_CLK 43
EROM_WP 44
F_SYNC 45
GND3 46
VCC2 47
INT0 48
FLASH_SCK 49
NC16 50

C689 NC C688 NC C687 NC C686 NC C685 NC C684 NC

KEY_GND

KEYS_E 51
KEYS_D 52
KEYS_C 53
KEYS_B 54
KEYS_A 55
LINE_SZ 56
NC17 57
BELL 58
RLY 59
KEYIN6 60
KEYIN5 61
KEYIN4 62
KEYIN3 63
KEYIN2 64
KEYIN1 65
GND4 66
VCC3 67
T_CLK(JTAG) 68
T_MODE_SEL(JTAG) 69
T_D_IN(JTAG) 70
T_D_OUT(JTAG) 71
SP_LED 72
CHARGE_DET 73
NC18 74
NC19 75

NC7 25
RADIO_EN 24
NC6 23
NC5 22
NC4 21
NC3 20
SLOT_CTRL 19
TX_DATA 18
SYN_OUT 17
NC2 16
FLASH_CS 15
FLASH_SI 14
FLASH_SO 13
FLASH_RE 12
RSTN 11
GND1 10
VCCIN 9
VDD 8
XOUT 7
XIN 6
NC1 5
NC(TXMOD) 4
BMCCLK 3
SPP 2
GNDPA 1

3.3V
VCC

C322 10u R322 100

(1) IC321

2 4

VOUT1 INPUT

3

(2)

VOUT2

ADJ

1

(3)

R321 140

R421 47k

RST

C468 NC

L478 NC
L479 NC

C467 NC

(4)
SPP
SPN

C478 10p

10p

C477

D473 5.1V

K

D472 5.1V

C469 NC

K

C531 0.1u
C471 10p C474 10p C479 NC L476 6.8u

A

L477 6.8u

R422 1k

C509 10p C508 10p C473 10p

X501 13.824MHz R509 1M

C475 1000p
C472 NC

C459 NC

RA452 NC

3

2

4

1

C457 NC
C458 NC

C422 0.1u

C513 0.1u

C514 10u

C352 10p

IC501

C504 0.1u

SPN 100
VCCPA 99
NC(HSOUT) 98
LOUT0 97
LIN0 96
VCCA 95
HSMIP 94
HSMIN 93
GNDA 92
IN 91
DCIN2 90
CID_INN 89
CID_INP 88
VREF 87
DCIN1 86
PDN 85
GND5 84
MSG_LED 83
UART_RX 82
UART_TX 81
SDA 80
SCL 79
BANK2 78
INT1 77
ANS_LED_1 76

HSOUT

C519 NC C516 10u C515 K1.0u

C120 1000p R533 4.7k

R591 NC R592 NC R594 NC R593 NC INT1 (for FLASH BOOT)

RA501

4

5

3

6

2

7

1

8

4.7k

UVCC
URX UTX
UGND

JG

JI

JC JS

28ms

C476 10p C185 10p C517 0.1u C518 10u C512 NC C151 NC

C454 NC C455 NC C456 NC

RA451 NC

3

2

4

1

(5) (6)
MIP WBX03
NC MIN
R178 (7)
1k
(8)
(9) (10) (11) (12) (13)
(14)
(15) (16) (17)

KEYB JO

KEYA R660 NC

KEYC

KEYD

R661 NC

R662 NC

R663 NC

KEYE R664 NC

KEY1

KEY2

KEY3

SP_LED MSG_LED ANS_LED
KEY6 KEY5 KEY4

C671 NC C672 NC C674 NC R674 NC R672 220 R671 330

SW662

2

1

NC

C660 0.1u C662 NC

Power ON (Reset)

C661 NC

KEYS_A KEYIN6 KEYIN5 KEYIN4 SP_LED KEYS_E KEYS_D KEYS_C KEYIN3 KEYIN2 KEYIN1 KEYS_B ANS_LED MEG_LED 2APVCC

WBX02 NC
NC: No Components

WBX01 10pin
Operation unit interface

20

C321 K1.0u

(1) (2) (3)
(4)
(5) (6)

R451 NC

C452 NC C451 NC

C179 NC

C178
(7)
0.022u
(8)

K

D153

A

(9)

R154 1k

(10)

(11)

(12)

R134 1k

(13)

(14) (15) (16) (17)

D133

A

K

C176 10u

VCCA C342 K1.0u C341 6.3 330u
C331 K0.47u

KX-TG6431M/KX-TG6431T/KX-TGA641M/KX-TGA641T

3.3V
E C
Q171

R171 22

R176 R175 560 100

C172

C186 10p C181 0.1u C182 NC C183 NC

IC331

VOUT 5

VIN 4

NC2 6

VDET 3

GND *RESET

7

2

CD 8

NC1 1

C343 K1.0u

K

A

D341 NC

C161 10u 50 R168 820 R160 82

RF_GND

DIGITAL_GND

D143 25V

K

D142 NC

C142 K0.01u

C174 NC

C171

NC

R166 NC

R163 12

1000p R172 100k

RX 120mVp-p
C173
B
K0.22u

R165 27k

Q161 C
E
C165 NC
R164 2.7k

C163 C162

NC NC R162 47k

TX 800mVp-p
B
R161 100k

R151 10M R152 3.3M

C152 K0.01u R156 NC

NC Q156 C
B
E

A

C167 NC

C160 NC

C166 NC C164 NC

C168 2.2u R167 27

C170 NC C169 NC

R181 390 R182 56

C184 K1.0u

R157 NC R155 NC R145 2.2k R144 NC C143 NC

D145 NC C141 NC R142 2.7k

C306 16 100u R364 NC

7.5 ~ 6.5V (+6.7V)

Charging detection

R372 10
R374 10

R371 10
R373 10

D362 NC

A

0

R362

R365

NC C

Q362
B

E NC

C361 NC

E

Q361 B R361

C

NC

L361 6.8u

K

L362 CHARGE+ 470nH

R375 NC L371 6.8uH

R363 NC CHARGE-
L372 NC

C301 NC

REFERENCE 1XX : TEL LINE 3XX : POWER, CHARGE 4XX : RESET, MIC, SP 5XX : DSP, RF I/F 6XX : FLASH, KEY, LCD 7XX : RF(2.4G) 8XX : RF(5.8G)

DCP2

D301

F301 3.0A

DCP

D361

A

K

CHARGE PAD
CHG static GND SP static GND

22V

DCM DCM2

Q141

C B
E

R131 10M

R141 100k

SA103
12
NC

Q142

B

C

E

R133 1M C132 K0.01u

C101 680p D101

3

2

4

1

C102 680p

R121 390k C121 680p R122 390k
C122 680p
CID

GAP

L101 33u L1T

SA102 300V
SA101
12
NC

L102 33u C116 NC C115 NC R115 NC

L1R P101 22

Test Signal Frequency: 1kHz

RX (MIC Mute: ON) -25dBm/600 IN 100mVp-p
TX -10dBm/600 700mVp-p

C111 0.047u R111 100k C112 R112 100k 0.047u

R114 47k

Q111
E B
C

R113 10k

C113 K0.68u

K

C114 NC

D113

A

Bell detection

NC: No Components KX-TG6431 SCHEMATIC DIAGRAM (Base Unit_Main)

21

KX-TG6431M/KX-TG6431T/KX-TGA641M/KX-TGA641T
7.3. Schematic Diagram (Base Unit_RF Part)

(1) (2)

R772 560 C772 J33p

L797 560 R782 NC C782 D10p

ANT2

C793 10p

L791 0

C797 10p ANT1

L795 0

C796 0.5p C795 NC

C792 NC C791 NC

R781 NC L798 560 C781 D10p

D781
2

1

3

C776 B1.5p

D771

3

1

2

C773 D10p
(3)

C777 B1.8p

L754 5.6nH

C765 10p

(4)

C775 B1.8p
)
C771 D10p R771 NC L796 560 C764 B1.8p

C762 0.5p C761 NC

(5) (6)

NC: No Components 22

KX-TG6431M/KX-TG6431T/KX-TGA641M/KX-TGA641T

C713 NC

C712 K0.1

3.0V
V_RF
(1) (2)

C711 D10p

C721 J100p

BCLK

L721 1uH C722 J120p

DTEST1 DTEST
C714 K1uF

R731 100 R732 100

SYN_OUT SYN_EN SYN_CLK

33
VCC_PLL 32 VCC_DIV 31
REF_IN 30 DTST1 29 DTEST 28 VDD_DIG_t 27 SYN_OUT 26 SYN_EN 25

SYN_DATA

ATSTp

1 VCC_VCO 2 PAEN 3 ATST_p

SYN_CLK 24 SYN_DAT 23 SLOT_CTRL 22

3.3V

SLOT_CTRL RADIO_EN

PGND

(3)

4 ATST_n

RADIOEN 21

5 ANT_n

TR_DATA 20

6 TRSW

VCC_IO 19

7 Rxp

RSTN 18

8 Rxn

VCC_DIG 17

C715 K0.1

C756 NC C755 B1.2p

TX_p 9 TX_n 10 TRSW_n 11 ANT 12 VCC_FE 13 VDD_IF 14 VCC_IF 15 VDD_DIG_b
16

IC701

R715 NC

R736 390

RX_DATA TX_DATA

L751 4.7n

C757 1.3p

(4)
L753 4.7n
C753 B1.0p C754 K0.1
(5) (6)

L752 18n

C752 D10p

C751 1.3p

C758 NC

C701 D10p C702 K0.1 C703 D10p C704 K2.2uF C705 D10p C706 K0.1 C707 D10p C708 K1uF
C710 K0.1

L739 NC
3.0V
ZA1

C737 K0.01

DVCC RF_RSTN
V_PA

2 3 4
1

NC: No Components KX-TG6431 SCHEMATIC DIAGRAM (Base Unit_RF Part)
23

KX-TG6431M/KX-TG6431T/KX-TGA641M/KX-TGA641T
7.4. Schematic Diagram (Base Unit_Operation)

2APVCC MEG_LED ANS_LED
KEYS_B KEYIN1 KEYIN2 KEYIN3 KEYS_C KEYS_D KEYS_E

LED902 LED901K A
KA

ERASE

1

2

RPT

1

2

STOP

1

2

UP

1

2

ANS1

1

2

MSG2

1

2

MSG1

1

2

SKIP

1

2

DOWN LOCAT/INT

1

21

2

NC: No Components KX-TG6431 SCHEMATIC DIAGRAM (Base Unit_Operation)

24

Memo

KX-TG6431M/KX-TG6431T/KX-TGA641M/KX-TGA641T

25

KX-TG6431M/KX-TG6431T/KX-TGA641M/KX-TGA641T
7.5. Schematic Diagram (Handset_Main)

RF circuit BCLK

RXI TXO

BCLK

TX_DATA SLOT_CTRL
RX_DATA

R540 NC

C540 K0.1

DVCC RADIO_EN
RF_RSTN SYN_DATA
SYN_EN SYN_CLK SYN_OUT
V_PA
V_RF

RF control line

RF_RSTN

2.7V

SYN_DATA

3.1V

NCC519 SYN_EN SYN_CLK

3.1V

IC546

SYN_OUT

2.7V IC741
2.7V

NC

4

ON/OFF

3
RF_POWER

VSS 2

VOUT 5 VIN 1

1 SI 2 SCK 3 RESET 4 CS

SO 8 GND 7 VCC 6 *WP 5

NC

For Flash Boot

C504 K0.1

C713 10uF C743 K1uF C742 K0.47uF

ANT1 ANT2

ANT1

ANT2

DOWN MENU
UP

0 SYA

LEFT 7 8 9
RIGHT

TALK 4 5 6
OFF

SP

KIN_5 1

KIN_4 2

3 FLASH

KIN_3 TE
KIN_2

KIN_1

TX_EN

C511 NC

26 27 28 29
SYN_EN 30 SYN_CLK 31 SYN_DATA 32
33 34 35
RX_DATA 36
37 38 39 40 41 42 43 44 45
SCL 46 SID 47
48 49 50
RESET

RADIO_EN HEAD_DET GND6 VCC1 SYN_EN SYN_CLK SYN_DATA NC4 TX_EN KEY_BL_LED RX_DATA NC CHG_DET NC LCD_BACK_LIGHT NC CHG_CTL NC DB DB DB6(SCL) DB7(SID) GND7 VCC2 RESET

RF_RSTN 25 NC 24
RF_POWER 23 NC 22
SLOT_CTRL 21 TX_DATA 20 SYN_OUT 19 NC 18 FL_CS 17 FL_DI 16 FL_DO 15 FL_RST 14 RST 13 GND5 12 GND4 11 GND3 10 GND2 9 VCCIN 8 VDD 7 XOUT 6 XIN 5 NC1 4 BCLK 3 SPP2 2 GND1 1 (GNDPA)

RF_RSTN RF_POWER SLOT_CTRL
TX_DATA SYN_OUT R511 NC C510 K1.0 K0.01 C512 C502 12p C501 D10P

RST
(1) (2)

IC501

C515
K0.1 C514
10uF 6.3V

X501 13.824M
R501 1M
(3) (4)

SPPN 100 VCC4(PCCPA) 99
SPN 98 SPP1 97 IBAT2 96 HSM 95 VCCA 94 GND10(GNDA) 93 MICBIAS 92
MIM 91 MIP 90 VREF 89 IBAT1 88 PDN 87 GND9 86 EEPROM_WP 85 UART_RX 84 UART_TX 83 EEPROM_DATA 82 EEPROM_CLK 81 FB2 80 FB1 79 KIN_5 78 KIN_4 77 KIN_3 76

(5) (6) (7) (8) (9) (10) (11) (12) (13) (14) (15) (16) (17) (18) (19) (20) (21) (22) (23) (24) (25) (26)

51 FL_CLK 52 CI 53 NC 54 NC 55 ANT_LED 56 A0 57 NC 58 NC 59 LCD_POWER 60 NC 61 CS1 62 NC 63 KEYSTB_E 64 KEYSTB_D 65 KEYSTB_C 66 KEYSTB_B 67 KEYSTB_A 68 GND8 69 VCC3 70 TCK 71 TMS 72 TDI 73 TDO 74 KIN_1 75 KIN_2

KIN_3 KIN_4 KIN_5

STB_E STB_D STB_C STB_B STB_A KIN_1 KIN_2

STB_A STB_B STB_C STB_D STB_E

5.0V 3.1V

R562 NC R563 0

1

2

RA551 330

RA552 330

5

6

7

8

4

3

2

1

LED553 4

3

LED558

LED554

LED552

LED559

Q562

LED555
NC
LED556
NC
LED557
NC

1

8

2

7

3.1V RA553 NC

R561 100

5

6

4

3

Q563 NC

Q561

LED561 Top View

C565 C564 1u
K0.1

C567 10p

3.1V

5.0V

3.1V

5.0V

R560

NC

C562 K1.0

1 VIN

6

VOUT

2 C+

5 GND

3 ON/*OFF 4 C-
IC561

5.0V

Charge pump for LCD back light
5.0V

LED551

R564 100

KEY_BACKLIGHT (Amber)

LCD_BACKLIGHT BELL_LED

(Amber)

NC: No Components

White_LED LCD_BACKLIGHT

GND OTP_PWR
CS1 RES
A0 SCL
SI VDD VDDA VSS
V0 GND

1 CN3 2 CN3 3 CN3 4 CN3 5 CN3 6 CN3 7 CN3 8 CN3 9 CN3 10 CN3 11 CN3 12 CN3

R580 NC

20ms
CI
Power ON (Reset)

C596 K0.1

1

8

2

7

3

6

4

5

TCK TMS TDI TDO RA501
4.7k

(27)

CS1

A0 VDD

VDD

SID

SCL

A0

RESET

CS1

C568
NC C566
NC OTP

C569

NC

R566 NC R567 0

2.7V
R578 NC C578 K1.0

2.7V

IC541

EEPROM-16K

1 A0
2 A1
3 A2
4 VSS

8 VCC
7 WP
6 SCL
5 SDA

R542 2.2k R541 10k

(28) (29) (30)

C541 K0.1 C542 J100P

Parameter saving EEPROM

(31) (32)

26

KX-TG6431M/KX-TG6431T/KX-TGA641M/KX-TGA641T

TEST SIGNAL FREQUENCY:1kHz
Voice circuit

SP phone RX (MIC Mute: ON) 1.8Vp-p/8 (Vol.Max)

1 + SP_PHONE

2

–

C426 NC D426 C427 NC D427

2.7V

R436

(1)

R431 NC

1k

(2)

R437 100k

R600 0
C434 NC C432 NC

GND_0

L431

NC

L432

NC

C435 10uF

L434

GND_0

Headset TX

50mVp-p/600 IN

CN431
1 2 3 4 5

HEADSET_JACK

Headset RX 170mVp-p/150 (Vol. Max)

SPP

(3) (4) (5) (6) (7) (8) (9) (10) (11) (12) (13) (14) (15) (16) (17) (18) (19) (20) (21) (22) (23) (24) (25) (26)
(27)

C506 K0.1 C533 10p C532 10p

Analog GND

GNDPA
C508 10uF 6.3V
R508 10

C503 K1.0
GNDA

PDN

R526 47k

R509 R505 R506 R507

100k NC NC NC

C526 K0.1

2.7V

C371 K1.0 C373 6.3V 330u C372 K1.0
R371 47

C520 10p
C521 10p C522
10p

C534 1000p C535 1000p

R433 C433

R435 NC

RA403

3

2

4

1

100

C436

NC

C423 NC D423

C424 NC D424

GND_0

C421 K1.0 C422 K1.0

1 + RECEIVER
2-
Handset RX SPM (MIC Mute: ON)
590mVp-p/150

R434 2.2k

C523 10p

1k K6800P

R417 390

RA401

C414

3

2 K0.022u

C416 K1000p

UART

4

1

1k

C415

K0.022u

RX TX

C417 10uF 6.3V

RA402 2.2k

3

2

4

1

MICP R412 100

MICM

R413 100

GND_0

C413 NC D413 C412 NC D412
C411 NC

2
MIC
1
Handset TX 88mVp-p/600 IN

IC371
2.7V

4 NC

3

ONOFF

VSS 2

5 VOUT 1 VIN
R380

NC

R374 220k

IC374
2.0V_Reset
1 OUT 4 VSS
2 VDD 3 NC

C374 K0.1

3.1V

3.1V
DC/DC

V_BAT1
PDN_IC

GND_0 GND_0

IC373
3.1V 1 VOUT 5
EXT
2 VDD
3 ON/*OFF 4 VSS

IC372

3K

A4

2S

NC 5

1G

D6

GND_0

L374 10n

GND_0 GND_0

R376 1.0M R378 1.0M

2.6~3.0V

C362 K0.1 C361 680u 6.3 C365 NC

SP phone TX 30mVp-p/600 IN
VSS

VBAT

F301 5.6n

BATTP

GND_0 BATTERY

BATTN GND_0

D361 R370 1.2

Q543
E B
C

R543 270k

C544 K0.1

(28)

EEPROM

(29)

Writing

(30)

protection TR

C377 K0.1 R377 2.2M C379 K0.1 R379 2.2M

Overvoltage detection circuit R368 10k

2.7V

R369 33k

Q364

R367 120

D364

R363 47k

R366 3.3k

Q361

R361 47k

560

R362

Q362

C353 NC C351 NC

GND_0

CHG1
CHARGE Terminal GND_0 CHG2

Charging control TR

R391 NC R390 NC C390 NC

C364 NC C363 K0.1

R534 10k

Charging detection Q531

Q390 NC

IC390
1 OUT 4 VSS
2 VDD 3 NC
NC

C391 NC R393 NC R392 NC

C531 K0.1 D531 NC

(31) (32)
NC: No Components KX-TGA641 SCHEMATIC DIAGRAM (Handset_Main)

27

KX-TG6431M/KX-TG6431T/KX-TGA641M/KX-TGA641T
7.6. Schematic Diagram (Handset_RF Part)

(1) (2)

R772 560 C772 J33p

L797 R782 NC 560
C782 D10p

ANT2

C793 D10p

L791 0

ANT1

C797 D10p

L795 0

C796 NC C795 NC

C792 0.5p C791 NC

R781NC L798 560 C781 D10p

D781

2

1

3

C776 B1.5p

D771

3

1

2

C773 D10p
(3)

C777 B1.8p

L754 5.6nH

C765 10p

(4)

C775 B1.8p
)
C771 D10p R771 NC L796 560 C764 1.8p C762 0.5p C761 NC

(5) (6)

NC: No Components 28

KX-TG6431M/KX-TG6431T/KX-TGA641M/KX-TGA641T

C712 K0.1

2.7V
V_RF
(1) (2)

C711 D10p

C721 J100p

BCLK

L721 1uH
C722 J120p

DTEST1 DTEST
C714 K1uF

R731 100 R732 100

SYN_OUT SYN_EN SYN_CLK

33
VCC_PLL VCC_DIV 32
REF_IN 31 DTST1 30 DTEST 29 VDD_DIG_t 28 SYN_OUT 27 SYN_EN 26
25

SYN_DATA

ATSTp

1 VCC_VCO 2 PAEN 3 ATST_p

SYN_CLK 24 SYN_DAT 23 SLOT_CTRL 22

2.7V

SLOT_CTRL RADIO_EN

PGND

(3)

4 ATST_n

RADIOEN 21

5 ANT_n

TR_DATA 20

6 TRSW

VCC_IO 19

7 Rxp

RSTN 18

8 Rxn

VCC_DIG 17

C715 K0.1

C755 B1.2p

C756 NC

TX_p 9 TX_n 10 TRSW_n 11 ANT 12 VCC_FE 13 VDD_IF 14 VCC_IF 15 VDD_DIG_b
16

IC701

R715 NC

R736 390

RX_DATA TX_DATA

L751 4.7n

C757 1.3p

(4)
L753 4.7n
C753 B1.0p C754 K0.1
(5) (6)

L752 18n

C752 D10p C758 NC

C751 1.3p

C701 D10p C702 K0.1 C703 D10p C704 K2.2uF C705 D10p C706 K0.1 C707 D10p C708 K1uF
C710 K0.1

L739 NC
3.1V
ZA1

C737 K0.01

DVCC RF_RSTN
V_PA

2 3 4
1

NC: No Components KX-TGA641 SCHEMATIC DIAGRAM (Handset_RF Part)
29

KX-TG6431M/KX-TG6431T/KX-TGA641M/KX-TGA641T
8 Exploded View and Replacement Parts List
1. RTL (Retention Time Limited) Note: The “RTL” marking indicates that its Retention Time is Limited. When production is discontinued, this item will continue to be available only for a specific period of time. This period of time depends on the type of item, and the local laws governing parts and product retention. At the end of this period, the item 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. ISO code (Example: ABS-94HB) of the remarks column shows quality of the material and a flame resisting grade about plastics.
Note: (*1) You can download and refer to the Operating Instructions (Instruction book) on TSN Server.

Safety

Ref. No. A1
A2 A3 A4 A5 A6 A7 A8 A9

Part No. PQLV219Z
PQJA10075Z PNKL1010Z1 PNQX1624Y PNQW1485Y PNKE1029Z1 PNHS1079Z PNKK1027Z1 PNYNTGA641TR

AC ADAPTOR

Part Name & Description

CORD, TELEPHONE STAND, WALL MOUNT INSTRUCTION BOOK (*1) LEAFLET, QUICK GUIDE (for English) HANGER, BELT CLIP SPACER, BATTERY COVER LID, BATTERY COVER LID, BATTERY COVER ASS’Y

Remarks
ABS-HB
ABS-HB ABS-HB ABS-HB

30

KX-TG6431M/KX-TG6431T/KX-TGA641M/KX-TGA641T
T.I KXTG6431M KXTG6431T KXTGA641M KXTGA641T 31