Panasonic KX-TS840B User manual

© Panasonic System Networks Co., Ltd. 2012
Unauthorized copying and distribution is a violation
of law.
ORDER NO. KM41209620CE
J01
Telephone Equipment
Model No. KX-TS840B
KX-TS840W
Integrated Telephone System
B: Black Version
W: White Version
(for U.S.A)

2
KX-TS840B/KX-TS840W

3
KX-TS840B/KX-TS840W
TABLE OF CONTENTS
PAGE PAGE
1 Safety Precautions----------------------------------------------- 4
1.1. For Service Technicians --------------------------------- 4
2 Warning -------------------------------------------------------------- 4
2.1. About Lead Free Solder (Pbf: Pb free)--------------- 4
2.1.1. Suggested PbF Solder ------------------------------ 5
2.2. Discarding of P. C. Board-------------------------------- 5
3 Specifications ----------------------------------------------------- 6
4 Location of Controls and Components ------------------- 7
5 Installation Instructions ---------------------------------------- 7
6 Operating Instructions------------------------------------------ 7
6.1. For Service Hint-------------------------------------------- 7
6.1.1. How to reset forgotten password ----------------- 7
6.1.2. How to clear memory or reset --------------------- 7
7 Schematic Diagram ---------------------------------------------- 9
7.1. For Schematic Diagram---------------------------------- 9
7.2. Schematic Diagram (Main)-----------------------------10
7.3. Schematic Diagram (Operation) ----------------------12
8 Exploded View and Replacement Parts List -----------13

4
KX-TS840B/KX-TS840W
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.
2Warning
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).
This model, and others like it, manufactured using lead free solder will have PbF stamped on the PCB. For service and repair
work we suggest using the same type of solder.
Caution
• PbF solder has a melting point that is 50 F ~ 70 F (30 C ~ 40 C) higher than Pb solder. Please use a soldering iron with
temperature control and adjust it to 700 F ± 20 F (370 C ± 10 C).
• Exercise care while using higher temperature soldering irons.:
Do not heat the PCB for too long time in order to prevent solder splash or damage to the PCB.
• PbF solder will tend to splash if it is heated much higher than its melting point, approximately 1100 F (600 C).
• When applying PbF solder to double layered boards, please check the component side for excess which may flow onto the
opposite side (See the figure below).
component
component
pin
solder
remove all of the
excess solder
slice view

5
KX-TS840B/KX-TS840W
2.1.1. 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 manufac
turer's specific instructions for the melting points of their products and any precautions for using their product with other
materials. The following lead free (PbF) solder wire sizes are recommended for service of this product: 0.3 mm, 0.6 mm and 1.0
mm.
2.2. Discarding of P. C. Board
When discarding P. C. Board, delete all personal information such as telephone directory and caller list or scrap P. C. Board.
0.3mm X 100g 0.6mm X 100g 1.0mm X 100g

6
KX-TS840B/KX-TS840W
3 Specifications
Note:
• Design and specifications are subject to change without notice.
Power Source: From telephone line
Redial: The unit redials the last dialed number
Speaker Unit : Handset : 3 cm (1 13/16") PM dynamic type 150 
Microphone: Electric condenser microphone
Input Jack : Telephone Line
Operating conditions: 0C - 40C, 20 % - 80 % RH relative air humidity (dry)
Dimensions (H x W x D) : Approx. 93 mm x 172 mm x 220 mm
Mass (weight) : Approx. 567.5 g

7
KX-TS840B/KX-TS840W
4 Location of Controls and Components
Refer to the Operating Instructions.
Note:
You can download and refer to the Operating Instructions (Instruction book) on TSN Server.
5 Installation Instructions
Refer to the Operating Instructions.
Note:
You can download and refer to the Operating Instructions (Instruction book) on TSN Server.
6 Operating Instructions
Refer to the Operating Instructions.
Note:
You can download and refer to the Operating Instructions (Instruction book) on TSN Server.
6.1. For Service Hint
6.1.1. How to reset forgotten password
If the current password is forgotten, follow this procedure, you will be able to establish a new password.
6.1.2. How to clear memory or reset
Lift the handset.
1
[PROGRAM] → [MODE] → [5]
2
Enter 7000 → [PROGRAM]
●A beep sound
3
Enter the new 4-digit password (0 to 9) → [PROGRAM]
●A long beep sound
4
When finished, hang up.
5
Lift the handset.
●SP-PHONE LED will turn ON.
1
3
Hang up and lift the handset again.
5
Memory is clear and reset as below:
Connect TEL line.
2
Erased
Erased
Default
Not changed
Not changed
Redial
Auto Dial (One touch/speed)
User setting area
User setting default
Adjustment data
Item EEPROM
[1] [9] [FLASH]
[PAUSE] → [PROGRAM]
4

8
KX-TS840B/KX-TS840W
Memo

9
KX-TS840B/KX-TS840W
7 Schematic Diagram
7.1. For Schematic Diagram
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.

10
KX-TS840B/KX-TS840W
7.2. Schematic Diagram (Main)
NC: No Components
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(11)
(12)
(15)
(16)
(27)
(13)
(14)
(17)
(18)
(19)
(20)
(21)
(22)
(23)
(24)
(25)
(26)
(29)
(30)
(31)
(28)
*C112
NC
*R116
270
L403
NC
R404
56
*C416
NC
C417
NC
C181
NC
C418
NC
*C409
NC *C108
NC
R401
1k
C402
NC
Q401
C401
0.1u
C404
0.1u
C405
0.1u
R411
2.7k
*C407
NC
R185
NC
Q403
C410
10u 16
Q402 Q107
R119
15
*R416
0
*VR401
NC
JJ401
3
2
1
4
C113
NC
C419
NC
IC601
1
RR
2
RTX
26
RXO
27
RXI
3
TXI
28
RRX
4
TXO
25
ACF
5
TLI
24
VLC
6
TLO
23
XDC
7
RLI
22
Gnd
8
RLO
21
VB
9
MCI
20
VCC
10
MCO
19
SKI
11
CP1
18
*CS
12
CP2
17
AGC
13
XDI
16
V+
14
SKG
15
SKO
R606 30k
R605 2.2M
R608 4.7k
R609 2.7M
R603 3.3k
R604
4.7k
*R600 2.2k
R610 100k
C607 0.027u
C613 0.068u
C608 0.022u
R611 18k
R612 1.8k
R613 100k
R614 47k
R616 4.7k
R617 2.2k
C620 0.033u
C616 0.1u
C601
1000u 6.3
C622
0.1u
C623
0.01u
D602
D401
D402
NC
D601
R491 470k
C421
NC
C425
0.1u
Q422
*VR402
NC
*C428
NC
*R425
2.7M
*R422
39k
R186
NC
C427 1000p
Q421
R901
0
C901
NC
*L423
NC
TP603
TP401
TP402TP403
*R659
NC
*C653
NC
*C654
NC
L652
NC
*D655
NC
*D652
NC
*R117 NC
*R118 6.8k
*C109
2700p
C403
0.01u
*R402
2.7M R403
2.7k
R406 330k
*R405
33k
Q404
*R410
2.7M
*R412
150
*C406
330p
*C408
0.033u
*R413
10k
C415 0.01u
*R414
470k
R415 680
C431
0.015u
*C602 0.047u
C606
0.068u
R602 2.7k
*C605 0.01u
*C603
0.022u
R618
8.2k
C485
0.01u
R421
2.7k
*C422
6800p
C424 1800p
R424 100k
R427
82
*C426
330p
C429
0.1u
R426 2.7k
D404
D403
R621 11k
R620 18k
R619 39k
C413
0.22u
R904 2.7M R903 4.7M R490 2.2M R623 1M
TP611 TP612
*C106 330u 10
Q182
NC
Q183
NC
*Q602
C610 1u
C611 1u
C621
100u 6.3
C618 33u 16
C617 47u 6.3
C615 22u 16
C614
47u 6.3
R804
150k
R803 100k
R493 8.2M
R492 1M
C433 470p
*C493
6.8M
R905
1M
C905
0.018u
C906
100p
C813
NC
C812 NC
*C625
NC
*C117
NC
*R844 30k
*R854 39k
*C841
0
*C844
5600p
*C842
NC
*R841
27k
TP92
TP91
JP2
JJ402
3
2
5
4
1
6
C441
1800p
JP3
*L411 NC
*L412
NC
*L413 NC
C414
0.22u
*R409
1k
*R408
3.3k
*R407
8.2k
L119
NC
R441
NC
*Q603
TP601
TP602
SP
-
+
*IC851
7
VCC
12
HSVOL3
13
HSVOL2
14
HSVOL1
15
HOLD_Music
16
SP_CS
28
EX_HOOK
29
RELAY
30
NC
31
P_MUTE/LSeizure
32
PULSE
4
XOUT
5
VSS
6
XIN
9
BEEP
10
Tx_MUte
11
RX_Mute
25
DTMF_H
26
DTMF_L
27
SP_LED
1
Vref
2
MODE
3
RESET
8
Headset
X1
3.58M
1
2
3
C811 0.1u
*Q654
NC
C432
0.015u
*C810
220u 16
C656
NC
*R601 10k
C629
0.01u
R420
0
*Q426
C612 4.7u
C619 4.7u
J3
NC
C843
3300p
*R429 15k
J8
JP4
J15
J16
J18
J20
J24
R607 68k
C609 0.1u
J26
J30
*C655
NC
*J33
NC
*J36
NC
R615
10k
J13
*R430
NC
*R442
NC
*R440 0
C411
NC
*D103
5.1V
J21
J6
J7
J23
J25
J31
J35
C815 0.01u
C814 NC
R802
NC
C412
0.1u
JPJP
C420
1u
*C110
0
*L414 NC
*L404
NC
AGC
AGC
TXMUTE
BEEP
VDD
MIC -
SP -
MIC +
SP +
Music
Headset Detect

11
KX-TS840B/KX-TS840W
KX-TS840 SCHEMATIC DIAGRAM (Main)
Handset Sending
Handset Receiving
Speaker Phone Sending
Speaker Phone Receiving
Ringer
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(11)
(12)
(15)
(16)
(27)
(13)
(14)
(17)
(18)
(19)
(20)
(21)
(22)
(23)
(24)
(25)
(26)
(29)
(30)
(31)
(28)
SW101
1
3
2 4
6
5
D101
4
1
3
2
FLT1
NC
1 4
2 3
C103 0.01u
*POS101
*SA102
NC
21
GND
R106 1M
*R180
0
R182
NC
R181
NC
R183
NC
C104 0.01u
*R109
NC
R112
0
R114NC
*R115
15k
C2
NC
*Q101
*SA101 0
*C111
22u 16
R105 150k
C102
680p
500
JJ101
1 2
*Q105
NC
Q181
NC
L107
NC
C101
680p
500
Q102
NC
*C1
1u 250
D1
C4 4.7u 50 C3 0.047u
R3 22k
R4 330k
D11
NC
D12
NC
R6 NC
R128
10k
TP1TP2
*PC101
NC
1 23
4
*R123
NC
R656
NC
R657
NC
C652
NC
R7 0
R8 10k
SW1
4
C
1
2
3
5
6
R104 4.7k
*R110 NC
*R111 NC
R126 47k
R127
6.8k
C115
1u
C105 NC
*R113 1.2k
R108 56k
D112
NC
C116
NC
C5
1u 50
*C114
220u 16
*D6
0
*D5
NC
*D4 NC
*D3
0
*D107
NC
Q110
*Q109
NC
*Q106
NC
D108
*L101
0
*L102
0
R103
100k
D105
R433 1.5M
D801
Q103
Q111
NC
C100 NC
C824 NC C823
NC
C821
NC
C822
NC
C825
NC
C820
NC
TP16
KEY1
TP20
HOOK
TP10
MIC +
TP21
SPON
TP17 KEY0
TP18 SP_LED
TP11
MIC -
TP14
KEY3
TP19 VSS
TP13 KEY4
*C801 NC
TP12
KEY5
*R129 NC
R120
NC
VDD
21
KEYIN3
22
KEYIN2
23
KEYIN1
24
KEYIN0
18
NC
19
KEYIN5
20
KEYIN4
17
HOOKSW
*D102
18V
*R2 0 *R1 6.8k (1/2W)
*C802 NC
*C803
470u 10
*C804 NC
D804
NC
R801
0
*Q104
C180
NC
R130 NC
J4
NC
J5
J2
TP15
KEY2
C657 NC
*D657
NC
*R842 33k
R9 220k
*Q108
R11
47k
C7 NC
C6
2.2u 50
R10 150k
*R658
NC
R660 NC
J10
J17
J19
J22
VSS
J27
J9
J28
J29
*R124
NC
*J1
NC
*J34
NC
J37
RINGER
1
+
2
-
CN1
PCB
LED1
CN2-2
NC
CN2-1
LED1
IC1
1
LINE1
2
GND
3
CSW
4
RA
5
OUT
6
NULL
7
CR
8
LINE2
J32
J12
*JP1
JP5
JP101
*Q604
NC
*D802
0
AGC
PULSE MUTE /
LINE SEIZER
EX-HOOK
DETECT
PULSE SHAPE
PULSE SHAPE
PATTERN
Complex Hi-impedance
circuit
*D112 use
for China model.
OFF-HOOK MODE
WHITE
RED WHITE
RED
CN2-1
LED
1AP
DC-Z Control (Low DC model)
GND
NC.: No Components

12
KX-TS840B/KX-TS840W
7.3. Schematic Diagram (Operation)
KX-TS840 SCHEMATIC DIAGRAM (Operation)
3
12
*
12
7
12
4
12
8
12
9
12
6
12
2
12
1
12
D890
D887
5
12
0
12
D886
#
12
D888
D891
D889
GND
Q861
TP18
SP_LED
TP16 KEY1
TP19 VSS
TP11
MIC -
TP17
KEY0
TP12 KEY5
TP13 KEY4
TP10
MIC +
TP14 KEY3
TP20
HOOK
TP15
KEY2
D880
D881
D882
D883
D884
D885
M1
12
M9
12
M4
12
M2
12
M8
12
M6
12
M5
12
M3
12
M7
12
M10
12
C887
0.01
TP21 SPON
MIC
1
2
R871
2.7k
Prog
12
Lock/Exit
12
Hold
12
Redial
12
Pause
12
Auto/Lwr
12
Flash
12
Mute/OK
12
Vol+
12
Vol-
12
SP_LED
PCB
R861
NC
R862
47K
R863
100k
C861
0.1u 50
SP
21
CN1
NC.: No Components

13
KX-TS840B/KX-TS840W
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 com-
ponents, 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 plas-
tics.
Note:
You can download and refer to the Operating Instructions (Instruction Book) on TSN Server.
YANI
KXTS840B
KXTS840W
Safety Ref. No. Part No. Part Name & Description Remarks
A1 PQJXF1001Z HANDLE/HANDSET (for KX-TS840B)
A1 PQJXF1002Z HANDLE/HANDSET (for KX-TS840W)
A2 PQJA10152W CORD, HANDSET (for KX-TS840B)
A2 PQJA10152Z CORD, HANDSET (for KX-TS840W)
A3 PQJA10075Z CORD, TELEPHONE