Panasonic KX-TG9581B User manual

© Panasonic System Networks Co., Ltd. 2014
Unauthorized copying and distribution is a
violation of law.
ORDER NO. KM41409856CE
F13
Telephone Equipment
Model No. KX-TG9581B
KX-TG9582B
KX-TGA950B
2-LINE Cordless Phone with Link-to-cell
B: Black Version
(for U.S.A.)
KX-TGA950
(Handset)
KX-TG9581
(Base Unit)
Configuration for each model
KX-TGA950 is also an optional accessory, which contains a handset
and a charger.
*
Model No Base Unit Portable Charger Unit Expandable
KX-TG9581 1 (TG9581) 1 (TGA950) 1 Up to 6
KX-TGA950* 1 (TGA950) 1
KX-TG9582 1 (TG9581) 2 (TGA950) 1 Up to 6
(Charger Unit)

2
KX-TG9581B/KX-TG9582B/KX-TGA950B
WARNING
This service information is designed for experienced repair technicians only and is not designed for use by the general
public. It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting
to service a product. Products powered by electricity should be serviced or repaired only by experienced professional
technicians. Any attempt to service or repair the product or products dealt with in this service information by anyone
else could result in serious injury or death.
IMPORTANT SAFETY NOTICE
There are special components used in this equipment which are important for safety. These parts are marked by
in the Schematic Diagrams, Circuit Board Diagrams, Exploded Views and Replacement Parts List. It is essential that
these critical parts should be replaced with manufacturer's specified parts to prevent shock, fire or other hazards.
Do not modify the original design without permission of manufacturer.
IMPORTANT INFORMATION ABOUT LEAD FREE, (PbF), 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.
LWhen you note the serial number, write down all 11 digits. The serial number may be found on the bottom of the unit.
LThe illustrations in this Service Manual may vary slightly from the actual product.

3
KX-TG9581B/KX-TG9582B/KX-TGA950B
TABLE OF CONTENTS PAGE PAGE
1 Safety Precautions----------------------------------------------- 5
1.1. For Service Technicians --------------------------------- 5
2 Warning-------------------------------------------------------------- 5
2.1. Battery Caution--------------------------------------------- 5
2.2. About Lead Free Solder (Pbf: Pb free)--------------- 5
2.2.1. Suggested PbF Solder ------------------------------ 6
2.3. Discarding of P. C. Board-------------------------------- 6
3 Specifications ----------------------------------------------------- 7
4 Technical Descriptions ----------------------------------------- 8
4.1. Block Diagram (Base Unit)------------------------------ 8
4.2. Circuit Operation (Base Unit)--------------------------- 9
4.2.1. Outline--------------------------------------------------- 9
4.2.2. Power Supply Circuit--------------------------------10
4.2.3. Telephone Line Interface---------------------------13
4.2.4. Transmitter/Receiver--------------------------------13
4.2.5. USB Interface-----------------------------------------14
4.3. Block Diagram (Handset)-------------------------------15
4.4. Circuit Operation (Handset)----------------------------16
4.4.1. Outline--------------------------------------------------16
4.4.2. Power Supply Circuit/Reset Circuit--------------16
4.4.3. Charge Circuit ----------------------------------------16
4.4.4. Battery Low/Power Down Detector--------------17
4.4.5. Speakerphone ----------------------------------------17
4.5. Block Diagram (Charger Unit)-------------------------17
4.6. Signal Route-----------------------------------------------18
5 Location of Controls and Components ------------------23
6 Installation Instructions---------------------------------------23
7 Operating Instructions-----------------------------------------23
7.1. Registering a Handset to the Base Unit ------------23
7.1.1. Deregistering a Handset ---------------------------23
8 Test Mode ----------------------------------------------------------24
8.1. Engineering Mode----------------------------------------24
8.1.1. Base Unit ----------------------------------------------24
8.1.2. Handset ------------------------------------------------26
8.2. How to Clear User Setting------------------------------28
8.2.1. Resetting both base unit and handset----------28
8.2.2. Resetting only handset-----------------------------28
9 Troubleshooting Guide----------------------------------------29
9.1. Troubleshooting Flowchart-----------------------------29
9.1.1. Check Power------------------------------------------30
9.1.2. Check Battery Charge------------------------------32
9.1.3. Check Link---------------------------------------------33
9.1.4. Check the RF part -----------------------------------35
9.1.5. Check Handset Transmission --------------------38
9.1.6. Check Handset Reception-------------------------38
9.1.7. Check Caller ID --------------------------------------38
9.1.8. Bell Reception ----------------------------------------39
9.1.9. Check TAM Operation------------------------------39
9.1.10. Check SP-phone Transmission ------------------40
9.1.11. Check SP-phone Reception ----------------------40
9.1.12. Check USB Function--------------------------------40
9.1.13. Check BT Communication-------------------------41
9.2. Troubleshooting by Symptom (Base Unit and
Charger Unit) ----------------------------------------------43
9.2.1. Check Point (Base Unit) ---------------------------43
9.3. Troubleshooting by Symptom (Handset) -----------45
9.3.1. Check Point (Handset) -----------------------------45
10 Disassembly and Assembly Instructions ---------------48
10.1. Disassembly Instructions-------------------------------48
10.1.1. Base Unit----------------------------------------------48
10.1.2. Handset------------------------------------------------ 52
10.2. Assembly Instructions-----------------------------------53
10.2.1. How to Replace the Base unit LCD------------- 53
10.2.2. How to Replace the Handset LCD-------------- 55
11 Measurements and Adjustments --------------------------56
11.1. Equipment Required ------------------------------------56
11.2. The Setting Method of JIG-----------------------------56
11.2.1. Connections (Base Unit) --------------------------56
11.2.2. How to install Batch file into P.C.----------------57
11.2.3. Commands--------------------------------------------57
11.3. Adjustment Standard (Base Unit)--------------------58
11.3.1. Bottom View ------------------------------------------58
11.4. The Setting Method of JIG (Handset)---------------59
11.4.1. Connections ------------------------------------------59
11.4.2. How to install Batch file into P.C.----------------60
11.4.3. Commands--------------------------------------------60
11.5. Adjustment Standard (Handset)----------------------61
11.5.1. Component View ------------------------------------61
11.6. Things to Do after Replacing IC or X'tal------------62
11.6.1. How to download the data ------------------------62
11.7. How to Check the Portable Speaker or
Receiver----------------------------------------------------68
11.8. Frequency Table (MHz)---------------------------------68
11.9. Bluetooth Frequency Table----------------------------69
12 Miscellaneous----------------------------------------------------70
12.1. How to Replace the Flat Package IC ---------------70
12.1.1. Preparation--------------------------------------------70
12.1.2. How to Remove the IC-----------------------------70
12.1.3. How to Install the IC --------------------------------71
12.1.4. How to Remove a Solder Bridge ----------------71
12.2. How to Replace the LLP (Leadless Leadframe
Package) IC -----------------------------------------------72
12.2.1. Preparation--------------------------------------------72
12.2.2. Caution-------------------------------------------------72
12.2.3. How to Remove the IC-----------------------------72
12.2.4. How to Install the IC --------------------------------73
12.2.5. How to Remove a Solder Bridge ----------------73
12.3. Terminal Guide of the ICs, Transistors and
Diodes ------------------------------------------------------74
12.3.1. Base Unit----------------------------------------------74
12.3.2. Handset------------------------------------------------ 74
13 Schematic Diagram --------------------------------------------75
13.1. For Schematic Diagram -------------------------------- 75
13.1.1. Base Unit (Schematic Diagram (Base
Unit_Main)) ------------------------------------------- 75
13.1.2. Handset (Schematic Diagram (Handset))-----75
13.2. Schematic Diagram (Base Unit_Main)--------------76
13.3. Schematic Diagram (Base Unit_Operation)-------78
13.4. Schematic Diagram (Base Unit_LCD)--------------80
13.5. Schematic Diagram (Base Unit_LED) -------------- 82
13.6. Schematic Diagram (Handset)------------------------84
14 Printed Circuit Board ------------------------------------------87
14.1. Circuit Board (Base Unit_Main) ----------------------87
14.1.1. Component View ------------------------------------87
14.1.2. Bottom View ------------------------------------------88
14.2. Circuit Board (Base Unit_Operation)----------------89

4
KX-TG9581B/KX-TG9582B/KX-TGA950B
14.2.1. Component View ------------------------------------89
14.2.2. Bottom View ------------------------------------------90
14.3. Circuit Board (Base Unit_LCD)-----------------------91
14.4. Circuit Board (Base Unit_TEL Jack) ----------------93
14.4.1. Component View ------------------------------------93
14.4.2. Bottom View ------------------------------------------93
14.5. Circuit Board (Handset)---------------------------------95
14.5.1. Component View ------------------------------------95
14.5.2. Bottom View ------------------------------------------96
15 Exploded View and Replacement Parts List -----------97
15.1. Cabinet and Electrical Parts (Base Unit)-----------97
15.2. Cabinet and Electrical Parts (Handset)-------------98
15.3. Cabinet and Electrical Parts (Charger Unit)-------99
15.4. Accessories and Packing Materials --------------- 100
15.4.1. KX-TG9581B --------------------------------------- 100
15.4.2. KX-TG9582B --------------------------------------- 101
15.4.3. KX-TGA950B--------------------------------------- 102
15.5. Replacement Parts List------------------------------- 103
15.5.1. Base Unit -------------------------------------------- 103
15.5.2. Handset---------------------------------------------- 107
15.5.3. Charger Unit---------------------------------------- 108
15.5.4. Accessories and Packing Materials----------- 108
15.5.5. Screws ----------------------------------------------- 109
15.5.6. Fixtures and Tools--------------------------------- 109

5
KX-TG9581B/KX-TG9582B/KX-TGA950B
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. Battery Caution
Risk of explosion if battery is replaced by an incorrect type. Dispose of used batteries according to the instructions.
Attention:
A nickel metal hydride battery that is recyclable powers the product you have purchased.
Please call 1-800-8-BATTERY (1-800-822-8837) for information on how to recycle this battery.
2.2. 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)

6
KX-TG9581B/KX-TG9582B/KX-TGA950B
2.2.1. 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.
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.
2.3. 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.
0.3 mm X 100 g 0.6 mm X 100 g 1.0 mm X 100 g

7
KX-TG9581B/KX-TG9582B/KX-TGA950B
3 Specifications
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-TCA93, KX-TCA400, KX-TCA430
• Optional range extender: KX-TGA405
• Optional key detector: KX-TGA20
• T-adaptor: KX-J66
Power source
Receiving Method
Oscillation Method
Detecting Method
Tolerance of OSC Frequency
Modulation Method
ID Code
Ringer Equivalence No. (REN)
Dialing Mode
Redial
Speed Dialer
Power Consumption
Operating Conditions
Dimensions (H x W x D)
Mass (Weight)
AC Adaptor
(PNLV226Z, 120 V AC, 60 Hz)
Super Heterodyne
PLL synthesizer
Quadrature Discriminator
10.368 MHz ±100 Hz
Frequency Modulation
40 bit
0.1B
Tone (DTMF)/Pulse
Up to 48 digits
Up to 24 digits (Phonebook)
Standby: Approx. 1.1 W
Maximum: Approx. 3.5 W
0 °C - 40 °C (32 °F – 104 °F),
20 % – 80 % relative air humidity
(dry)
Approx. 122mm x 258 mm x 174 mm
Approx. 860 g
Rechargeable Ni-MH battery
AAA (R03) size (1.2 V 550 mAh)
Super Heterodyne
PLL synthesizer
Quadrature Discriminator
10.368 MHz ±100 Hz
Frequency Modulation
40 bit
Tone (DTMF)/Pulse
Up to 48 digits
Up to 24 digits (Phonebook)
7 days at Standby,
15 hours at Talk
0 °C - 40 °C (32 °F – 104 °F),
20 % – 80 % relative air humidity
(dry)
Approx. 168 mm x 48 mm x 31 mm
Approx. 110 g
Base Unit Portable Charger
AC Adaptor
(PNLV233AZ 120 V AC, 60 Hz)
Standby: Approx. 0.1 W,
Maximum: Approx. 1.8 W
0 °C - 40 °C (32 °F – 104 °F),
20 % – 80 % relative air humidity
(dry)
Approx. 39 mm x 72 mm x 73mm
Approx. 100 g
Duplex procedure:
TDMA (Time Division Multiple Access)
Channel
spacing:
1,728kHz
Bit rate:
1,152 kbit/s
Modulation:
GFSK (Gaussian Frequency Shift Keying)
RF transmission power:
115 mW (max.)
Voice coding:
ADPCM 32 kbit/s
NStandard:
DECT 6.0 (Digital Enhanced Cordless
Telecommunications 6.0)
Number of channels:
60 Duplex Channels
Frequency range:
Bluetooth wireless technology 2.1
1.92 GHz to 1.93GHz (DECT)
2.402 GHz to 2.48 GHz (Bluetooth)
Interface:
USB 2.0 Full speed (12Mbps)
N
N
N
N
N
N
N
N
N

8
KX-TG9581B/KX-TG9582B/KX-TGA950B
4 Technical Descriptions
4.1. Block Diagram (Base Unit)
+〜
IC602
-〜
IC603 IC604
EXP I/O
LCD module 103x65 dots B/W,FSTN
+〜 -〜
IC703
LDO
CTRL
S_+1.8V
VBAT
HOOK DET
Headset DET
ANT SW
RF I/F
UART
PCM
MIC
Photo-coupler
ADC1
VBAT
DC2 CTRL
DCDC CON
to 4.0V
LDO
CTRL DC CTRL
DCDC CNT
to 3.4V
LDO
CTRL
M_+3.0V
EXP I/O CONT
PWM CTRL
UART
PCM I/F
VBAT
M_+1.8V
LSR2P LSR2N
QSPI I/F
BellDet/
C-ID
Side Tone
Circuit
LINE2 ADC
LCD
LINE2 C/ID
Ope Amp
DCDC convert 5.5V to 2.8V
LINE2 HOOK
Diode Bridge
Diode Bridge
Side Tone
Circuit
BellDet/
C-ID
EXP I/O CTRL
KEY IN
PCM I/F
LINE2 IN
SPI I/F
LINE1 BELL
LINE1 HOOK
LINE1 ADC
LINE1 PARA DET
LINE1 C/ID
SPP SPN
RESETSPI2 I/F
QSPI I/F
GPIO
LINE1 IN
LINE1 OUT
M_+3.0V
CHARGE CTRL
LEDs
UART RX
(USB)
UART TX
LCD Backlight
M_+3.0V
LINE2 BELL
LINE2 OUT
HANDSET
ANT 1 ANT 2
TX
Antenna SW
RX
TAM Flash (32Mbit)
P-Flash (16Mbit)
EEPROM (128Mbit)
Headset
Handset
BT-ANT
BT-Module
P-Flash (16Mbit) IC703
IC701 BBIC
EXP I/O
Photo-coupler
USB-UARt Brodge IC USB connector
Mini-B
KX-TG9581/9582 BLOCK DIAGRAM(Base Unit_Main)
LINE 2
HOOK SW
Transformer
Transformer
FUSE
SW
Change Control
FUSE DCIN
5.5V
IC601 BBIC
HOOK SW
To LINE 2
LINE 1
SPI I/F
Key Matrix

9
KX-TG9581B/KX-TG9582B/KX-TGA950B
4.2. Circuit Operation (Base Unit)
4.2.1. Outline
Base unit consists of the following ICs as shown in Block Diagram (Base Unit) (P.8).
• DECT BBIC (BBIC(Master)): IC601
- Handling all the audio, signal and data processing needed in a US DECT base unit
- Controlling the US DECT specific physical layer and radio section (Burst Module Controller section)
- ADPCM code filter for speech encoding and speech decoding (DSP section)
- Echo-cancellation and Echo-suppression (DSP section)
- Any tones (tone, sidetone, ringing tone, etc.) generation (DSP section)
- DTMF receiver (DSP section)
- Clock Generation for RF Module
- ADC, DAC, timer, and power control circuitry
- All interfaces (ex: RF, EEPROM, LED, Analog Front End, etc.)
- PLL Oscillator
- Detector
- Compress/Expander
- First Mixer
- Amplifier for transmission and reception
- Voice data compression and decompression
- Speaker Amp
- SP-Phone MIC Amp
- SP-Phone Speaker Amp
• EEPROM: IC604
- Temporary operating parameters (for RF, etc.)
• FLASH MEMORY 1: IC602
- Voice Prompt (TAM) D/L Area
- ICM/OGM/MEMO Recording Area
• Additionally,
- Power Supply Circuit (+4.0 V, +3.4 V, +3.0V, +1.8 V output)
- Crystal Circuit (10.368 MHz)
- Telephone Line Interface Circuit
• FLASH MEMORY 2: IC603
- Program DL
• LED Driver: IC102, IC103
• LCD Driver: IC601
• Key Matrix: IC101
• BBIC (Slave) IC701
- ADPCM code filter for speech encoding and speech decoding (DSP section)
- Echo-cancellation and Echo-suppression (DSP section)
- Any tones (tone, sidetone, ringing tone, , etc. ) generation (DSP section)
- DTMF receiver (DSP section)
• FLASH MEMORY IC703
- Program DL
• BT Module (IC501)
- Use for Bluetooth communication
•USB
- USB to UART Bridge Controller: IC401
- Photocoupler: IC402, IC403, IC404, IC405

10
KX-TG9581B/KX-TG9582B/KX-TGA950B
4.2.2. Power Supply Circuit
The power is supplied to the DECT-BBIC(Master),TAM-Flash,QSPI-Flash,BT-Module,EEPROM,
Expanded-I/O,BBIC(Slave),QSPI-Flash(forSlave),Expanded-I/O;
The brief block diagram is below.
<Fig.101>
<Fig.102>
AC-Adaptor
Jack F900 D901 Q903
IC901
L901 D1001
Charge
Circuit
Battery F900 IC906
IC904
Q606 1.8V
IC905 3.4V Q607
Q911 4.0V
LCD Back Light
IC602
TAM_Flash
IC601
(BBIC-Master)
IC603
QSPI_Flash
Prog IC402
IC403
IC404
IC405
IC402
IC403
IC404
IC405
IC401
USB IC
CN401
USB JACK
VBUS +5.0V
Isolated circuit
Photocoupler
IC501
BT_Module
IC604
EEPROM
IC101
Expended-I/O KEY
IC102, IC103
Expended-I/O LED
LCD-Module
IC701
(BBIC-Slave)
Q701 1.8V
IC703
QSPI_Flash
Prog
IC201
OP_AMP
3.0V
Main power supply
Battery power supply
DC-OUT(2.8V) VBAT(2.6V) VDD6(3.4V)
VDD7(4.0V)
VDD1(1.8V)
VDD2(3.0V)
VDD5(1.8V)
VDD1 (M_+1.8V)
RESET(RST)
(IC601_B8 pin)
IC601_C8 pin
VDD5 (S_+1.8V)
RESET(RSTn)
IC701_71pin
for IC601
for IC701

11
KX-TG9581B/KX-TG9582B/KX-TGA950B
4.2.2.1. Power Supply(2.8V): DC-OUT
The power supply(2.8V) is converted from 5.5VDC from AC adaptor by IC901,Q903, L901.
4.2.2.2. Switch curcuit for Battery power supply.
IC906 is a switch IC between Main power supply(from AC adaptor) and Battery power supply.
When having Power failure then disconnecting Main power supply DC-OUT goes down and IC906 becomes ON by IC904
to recover VBAT from Battery power supply.
On the other hand IC906 goes OFF when DC-OUT goes Up.
For switching by IC906, it is controlled by IC904, which is a voltage detector IC.
IC906(Pin4) is a control PIN, High is "ON", Low is "OFF".
Therefore this model can operate in electoric power failure state by battely inserted in base.
Note:
Both alkaline batteries and rechargeable batteriescan be used for the base unit, but we recommend that you use the charged
batteries (supplied).
4.2.2.3. Power supply(1.8V) :VDD1
This power supply consist of IC601and Q606 for CPU CORE and Memory on BBIC IC601.
C921
10u
R904 47
Q903
1
G
2
S
3
A
4
K
5
D
IC901
1
CE/CSS
2
VSS
3
FB
5
VIN
4
EXT/
R906 47
C913
1000p
R920
6.8k C909
22u
R919
15k
C908
NC
C915 2200p
L901
10u
V_IN
C912
0.01u
C920
10u
2.8V
0.9V
D1001
C921
10u
R904 47
R969
1k
C950
NC
Q903
1
G
2
S
3
A
4
K
5
D
C917
NC
R978
47k
Q956
4.7k
47k
IC901
1
CE/CSS
2
VSS
3
FB
5
VIN
4
EXT/
TP_FLG
C910
NC
C916 470u
R906 47
C913
1000p
R920
6.8k C909
22u
C922 0.1u
C956 470u
R919
15k
C908
NC
C915 2200p
R916
NC
ACF
L901
10u
V_IN
IC904
1
VOUT
2
VIN
3
NC
4
VSS
DC_OUT
C912
0.01u
Batt_PW_EN
R911 NC
C920
10u
Q957
4.7k
47k
M_+3.0V
C905
NC
C924
1u C923
1u
IC906
1
VOUT
2
VSS
4
CE
5
VIN
3
FLG
R914
120
R921 1k
R915 680
R967
1M
CMOS_OUT
2.8V
0.9V
DET at 2.2V
Q606
C613
1u
R613
10k
C612 K0.1u
VBATM_+1.8V
VDD1
C618
NC
C619
10p
RFP0n
C3
RFP1
A2
RFP2
E3
RF_SUPPLY1
A7
RF_SUPPLY2
M3
LDO_CTRL
A6
RF_SUPPLY_PA
A8
LDORF_CTRL
M5
VBAT
C617
1u
VBAT
C614 1u
VBAT

12
KX-TG9581B/KX-TG9582B/KX-TGA950B
4.2.2.4. Power supply(3.0V) :VDD2
This power supply is for Memory IC(IC602, IC603, IC604) and LCD-module and so on.
It consists of BBIC IC601 and Q607.
VBAT steps up to VDD6(3.4V) by IC601 and IC905. After that it gets VDD2(3.0V).
Because it is to use Battery supply at power failure.
4.2.2.5. Power supply(4.0V) :VDD7
This is a power supply for LCD back light.
It conststs of IC601 and Q911.
C620 K0.1u
Q607
R612 10k
+3.4V
C611
NC
R618 5.6k
VDD2
M_+3.0V
C621 K2.2u
R617
13k
M_+1.8V
C615
1u
LDO_CTRL
T10
LDO_IO_CTRL
V11
LDO_IO_FB
L3
AVD
E9
VDD1
P9
VDD2
L14
VDD3
A3
GND3
B4
GND4
C4
GND5
B5
GND6
C5
GND7
F5
GND8
G5
GND9
IC601
IC905
6
2 54
13
+3.4V
VBAT
IC601
U2
DC_CTRL
T3
DC_CTRLn
U1
DC_I
T2
DC_SENSE
P3
DC2_CTRL
R3
DC2_I
T1
DC2_SENSE
T17
NC16
N16
NC17
T18
NC18
R17
NC19
U18
NC20
M16
NC21
C914 22u
R910 240k
R917
100k
R903 0.1
C918
6p
L902
6.8u
GND
C907
1u
VDD6
MASTER
1V Reference
VDD7
IC601
P3
DC2_CTRL
R3
DC2_I
T1
DC2_SENSE
L966
10u
R929
0.1
R930 1.6k R931 11k
VBAT +4.0V
C911
1u
C901 4.7u
Q911
6
2 54
13
MASTER
0.5V Reference

13
KX-TG9581B/KX-TG9582B/KX-TGA950B
4.2.2.6. Power supply(1.8V) :VDD5
This power supply consist of IC601and Q701 for CPU CORE and Memory on BBIC IC701.
4.2.3. Telephone Line Interface
Note:
[ ]: Line 2
<Function>
• Bell signal detection
• Clip signal detection
• ON/OFF hook circuit
Bell & Clip (: Calling Line Identification Presentation: Caller ID) signal detection:
In the standby mode, Q101 [Q201] is open to cut the DC loop current and decrease the ring load.
When ring voltage appears at the L1T (A) [L2T (C)] and L1R (B) [L2R (D)] leads (when the telephone rings), the AC ring voltage is
transferred as follows;
ON/OFF hook circuit:
In the standby mode, Q101 [Q201] is open, and connected as to cut the DC loop current and to cut the voice signal. The unit is
consequently in an on-hook condition.
When IC601 [IC701] detects a ring signal or press the TALK Key onto the portable, Q102 [Q202] turns on and then Q101, [Q201,
PC201] turns on, thus providing an off-hook condition (DC current flows through the circuit) and the following signal flow
makes the loop current.
A [C] →D101 [D201] →Q101 [Q201] →Q103 [Q203] →R108 [R208] →D101 [D201] →B [D]
4.2.4. Transmitter/Receiver
• Audio Circuits and DTMF tone signal circuits.
Base unit and portable mainly consist of RF and DECT BBIC.
Base unit and portable transmit/receive voice signal and data signal through the antenna on carrier frequency.
Signal Path:
*Refer to Signal Route (P.18).
4.2.4.1. Transmitter Block
The voice signal input from the TEL LINE 1 interface goes to RF ,through DECT BBIC (IC601) as shown in Block Diagram (Base
Unit) (P.8)
The voice signal input from the TEL LINE 2 interface goes to RF though SlaveBBIC(IC701) and BBIC(Master : IC601) as shown in
BlockDiagram.
The voice signal passes through the analog part of IC601 [IC701] where it is amplified and converted to a digital audio stream
signal. The burst switch controller processes this stream performing encryption and scrambling, adding the various other fields
to produce the GAP (Generic Access Profile) standard DECT frame, assigning to a time slot and channel etc.
In IC601, the carrier frequency is changing, and frequency modulated RF signal is generated and amplified, and radiated from
antenna. Portable detects the voice signal or data signal in the circuit same as the following explanation of Receiver Block.
C703
K1u
R702
10k
R703
270
S_+1.8V
Q701
VDD5
25
P3_3/ADC0
P1_0/INT0/ADC1
23
VDD/AVD
24
LDO_CTRL
19
MICh
20
VREFm
21
LSRp
22
LSRn
VBAT
R723 56k
C720 680p
A [C] - C125 [C227] - R121 [R223] - IC601 (H1) [IC701 (15)] (Clip)
B [D] - C127 [C225] - R123[R221] - IC601 (H2) [IC701 (17)] (Clip)
-- IC601(J2)[IC701(18)] - R637[R725] - R636[R726] - IC601(F3)[IC701(12)] -(Bell)

14
KX-TG9581B/KX-TG9582B/KX-TGA950B
4.2.4.2. Receiver Block
The signal of 1900 MHz band (1920 MHz ~ 1930 MHz) which is input from antenna is input to IC601 as shown in Block Diagram
(Base Unit) (P.8).
In IC601, the signal of 1900 MHz band is downconverted to 864 kHz signal and demodulated,GAP (Generic Access Profile)
standard DECT frames. It passes through the decoding section burst switch controller where it separates out the frame
information and performs de-encryption and de-scrambling as required. It then goes to the DSP section where it is turned back
into analog audio. This is amplified by the analog front end, and goes to the TEL LINE 1 [IC701, TEL LINE 2] Interface.
4.2.5. USB Interface
• IC401 includes a USB 2.0 full-speed function controller. USB transceiver, oscillator, one-time programmable ROM, and
asynchronousserial data bus (UART) with full modem control signal. USB and UART is bridged by IC401

15
KX-TG9581B/KX-TG9582B/KX-TGA950B
4.3. Block Diagram (Handset)
QSPI FLASH MEMORY
IC4
SPEAKER
RECEIVER
MIC
CHARGE
CIRCUIT
Q2, Q3, Q4,Q2, Q3, Q4, Q9, R8Q9, R8
CHARGE
CONTACTS
CHARGE(+)
CHARGE_CTRL
CHARGE_DET
EEPROM SCL
SDA
BATTERY
TERMINAL
R45
VBAT
BATT-
1.8 V
Q1
1.8 V
CP 2.8 V
LCD
CD
RESET
CSB
SDA
SCL
CPU
Analog
Front
End
D/A A/D
35
37
21 22
17 18
34
33 66 67
32
24 73
63 64
76
ADPCM
Codec
Filter
DSP
Speech
Decoding
Speech
Encoding
BMC
Burst
Decoding
ANT1
Burst
Encoding
RF
PLL
MOD/DEMOD
1
2
87
86
RXn ANT1
RXp
TXp TXn
7
8
XTAL
X1
10.368
MHz
BATTERY
46
OFF
KEYPAD
ROWS
COLUMNS
57, 58, 59, 60
11, 12, 13, 14, 55
47, 48, 51, 53 QSPI-IO 0-3
44 45
Charge
Pump
CP3V
D3
CP2.8V
CP 4V
BBIC
IC1
IC3
65
KEY LED 61
LDO_CTRL
CP 3.0 V
CP3V
QSPI
Control
K
C
S-
IPSQ25
S
C-IPSQ94
KX-TGA950 BLOCK DIAGRAM (Handset)
LCD-BACK LIGHT 77
Reset
Reset
Pin 71
1 2
3 4 5

16
KX-TG9581B/KX-TG9582B/KX-TGA950B
4.4. Circuit Operation (Handset)
4.4.1. Outline
Handset consists of the following ICs as shown in Block Diagram (Handset) (P.15).
• DECT BBIC (Base Band IC): IC1
- All data signals (forming/analyzing ACK or CMD signal)
- All interfaces (ex: Key, Detector Circuit, Charge, DC/DC Converter, EEPROM, LCD, RF Power Amp.)
- PLL Oscillator
- Detector
- Compress/Expander
- Reception
- Integrated 1.9 GHz PA for DECT
• QSPI FLASH MEMORY: IC4
- Main Program D/L Area
• EEPROM: IC3
- Temporary operating parameters (for RF, etc.)
4.4.2. Power Supply Circuit/Reset Circuit
Circuit Operation:
When power on the Handset, the voltage is as follows;
BATTERY(2.2 V ~ 2.6 V: BATT+) →F1 →Q1 (1.8 V), IC1-44pin (3.0V)
The Reset signal generates IC1 (71 pin) and 1.8 V.
4.4.3. Charge Circuit
Circuit Operation:
When charging the handset on the charger, the charge current is as follows;
In this way, the BBIC on Handset detects the fact that the battery is charged.
The charge current is controlled by switching Q9 of Handset.
Refer to Fig.101 in Power Supply Circuit (P.10).
1.8 V
Reset
(IC1_61pin)
Battery +
CHARGE+(Charger) --> CHARGE+(Handset) --> R8 --> Q3--> F1 --> BATTERY (+) -->
BATTERY(-) --> R45 --> GND --> CHARGE-(Handset) --> CHARGE-(Charger)

17
KX-TG9581B/KX-TG9582B/KX-TGA950B
4.4.4. Battery Low/Power Down Detector
Circuit Operation:
“Battery Low” and “Power Down” are detected by BBIC which check the voltage from battery.
The detected voltage is as follows;
• Battery Low
Battery voltage: V(Batt) 2.25 V ± 50 mV
The BBIC detects this level and " " starts flashing.
• Power Down
Battery voltage: V(Batt) 2.0 V ± 50 mV
The BBIC detects this level and power down.
4.4.5. Speakerphone
The hands-free loudspeaker at SP+ and SP- is used to generate the ring alarm.
4.5. Block Diagram (Charger Unit)
Charger Terminal
AC Adaptor

18
KX-TG9581B/KX-TG9582B/KX-TGA950B
4.6. Signal Route
SIGNAL ROUTE ROUTE
IN OUT
SIGNAL
DTMF TONE
TEL OUT
(to Tel Line)
CDL TX
(to Tel Line)
CDL RX
(from Tel Line)
(PORTABLE)
DTMF TONE
TEL IN
(from Tel Line)
B
(BASE UNIT)
Line 1
A
D101 - Q101 - R105 - C121 - R135 - IC601(J2)
D
Line 2
C
D201-Q201- R205 -C205 - T201(1) -T201(5) - R236 - C221- IC701(19) - IC701 - IC601
B
(BASE UNIT)
Line 1
A
D101 - Q101 - R105 - C121 - R135 - IC601(J2) )
D
Line 2
C
D201 - Q201 - R205 - C205 - T201(1) - T201(5) - R236 - C221 - IC701(19) -
IC701 - IC601
(BASE UNIT)
from PORTABLE ANT1 - DA501 IC601(D1)
ANT2 - DA501 IC601(C1)
IC601(A4) C506 DA501- ANT1 - to PORTABLE
IC601(A5) DA501 - ANT2 - to PORTABLE
(PORTABLE)
from BASE UNIT ANT - C801 IC1(1) IC1(21) RECEIVER(+)
IC1(2) IC1(22) RECEIVER(-)
(BASE UNIT)
Line 1
IC601 (K3) - C112 - Q103- Q101 - D101 A
B
B
Line 2
IC601 - IC701 - IC701(21) - C218 - T202(3) - T202(4) - R215 - C212 - Q203- Q201 - D201 C
Line 1
IC601(K3) - C112 - Q103- Q101-D101 A
Line 2
IC601 - IC701 - IC701(21) - C218 - T202(3) - T202(4) - R215 - C212 - Q203- Q201 - D201 C
D
D
Caller ID
(from Tel Line)
(BASE UNIT)
LINE1
A - C125 - R121- IC601(H1) IC601(A4) C506 DA501- ANT1 - to PORTABLE
B - C127 - R123- IC601(H2) IC601(A5) DA501- ANT2 - to PORTABLE
MIC(+) - C13 - IC1(17) IC1(86) C859 - C801 - ANT to BASE
MIC(-) - C11 - IC1(18) IC1(87)
LINE 2
C - C225 - R221 - IC701(17) IC601
D - C227 - R223 - IC701(15)

19
KX-TG9581B/KX-TG9582B/KX-TGA950B
SIGNAL ROUTE ROUTE
IN OUT
SIGNAL
(PORTABLE)
from BASE UNIT - ANT1 - C801 IC1(1) IC1(35) Speaker(+)
IC1(2) IC1(37) Speaker(-)
Base Unit
SP-PHONE TX
(to Tel Line)
Base Unit
SP-PHONE RX
(from Tel Line)
Portable
SP-PHONE TX
(to Tel Line)
Portable
SP-PHONE RX
(from Tel Line)
(BASE UNIT)
(BASE UNIT)
(PORTABLE)
(BASE UNIT)
from PORTABLE ANT1 -DA501 IC601 (D1)
ANT2 -DA501 IC601 (C1)
MIC(+) - C13- IC1(17) IC1(86) C859 - C801 - ANT to BASE
MIC(-) - C11 - IC1(18) IC1(87)
(BASE UNIT)
Line 2
IC601 - IC701 - IC701(21) - C218 - T202(3) - T202(4) - R215 - C212 - Q203- Q201 - D201 C
D
Line 1
IC601(K3) - C112 - Q103- Q101-D101 A
B
B
Line 1
A
D101 - Q101 - R105 - C121 - R135 - IC601(J2)
D
Line 2
C
D201- Q201- R205 -C205 -T201(1) -T201(5) -R236 -C221-IC701(19) -IC701-IC601
Line 1
IC601(K3) - C112 - Q103- Q101-D10 A
B
Line 2
IC601 - IC701 - IC701(21) - C218 - T202(3) - T202(4) - R215 - C212 - Q203- Q201 - D201 C
D
B
Line 1
A D101 - Q101 - R105 - C121 - R135 - IC601(J2)
D
Line 2
C D201 - Q201 - R205 - C205 -T201(1)- T201(5)- R236- C221- IC701(19)- IC701- IC601
MIC(+) - C651 - IC601(L1)
MIC(-) - C652 - IC601(M1)
IC601(V9,U9,V6,U6) - Speaker(+)
IC601(V8,U8,V7,U7) - Speaker(-)
IC601(A4) C506 DA501- ANT1 - to PORTABLE
IC601(A5) DA501 - ANT2 - to PORTABLE

20
KX-TG9581B/KX-TG9582B/KX-TGA950B
SIGNAL ROUTE ROUTE
IN OUT
SIGNAL
Memo/OGM
Recording
(from Handset)
ICM Recording
(from Tel Line)
(BASE UNIT)
OGM Rec
(from Base Unit)
(BASE UNIT)
MIC(+) - C652 - IC601(M1)
MIC(- ) - C651 - IC601(L1)
Message Play
(to Base Unit)
(BASE UNIT)
IC602(2) - IC601(P12) -
IC601(V9,U9,V6,U6) - Speaker(+)
IC601(V8,U8,V7,U7) - Speaker(-)
Message Play
(to Tel Line)
(BASE UNIT)
(BASE UNIT)
IC602 (2) - IC601 (P12) -
(HANDSET)
MIC(+) - C13- IC1(17) IC1(86) C859 - C801 - ANT to BASE
MIC(- ) - C11- IC1(18) IC1(87)
Line 2
IC601- IC701- IC701(21) -C218 -T202(3) -T202(4) -R215 -C212 - Q203- Q201- D201 C
D
Line 1
IC601(K3) - C112 - Q103- Q101-D101 A
B
B
Line 1
A
D101 - Q101 - R105 - C121 - R135 - IC601(J2)
D
Line 2
C
D201-Q201-R205 -C205 - T201(1) -T201(5) -R236 -C221-IC701(19) -IC701- IC601
IC601(P11) - IC602(5)
IC601(P11) - IC602(5)
IC601(P11) - IC602(5)