Panasonic KX-TG8162ALB User manual

© Panasonic System Networks Co., Ltd. 2012
Unauthorized copying and distribution is a
violation of law.
ORDER NO. KM41203554CE
Telephone Equipment
Model No. KX-TG8162ALB
KX-TG8163ALB
KX-TGA815AZB
Digital Cordless Answering System
B: Black Version
(for Australia)
KX-TGA815
(Handset)
KX-TG8161
(Base Unit)
(Charger Unit)
Model No
Base Unit Handset Charger Unit Expandable
KX-TG8162
1 (TG8161) 2 (TGA815) Up to 6
KX-TG8163
1 (TG8161) 3 (TGA815) 2
1
Up to 6
KX-TGA815*
1 (TGA815) 1
Configuration for each model
*KX-TGA815 is also an optional accessory, which contains a
handset and a charger.

2
KX-TG8162ALB/KX-TG8163ALB/KX-TGA815AZB
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-TG8162ALB/KX-TG8163ALB/KX-TGA815AZB
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
4.3. Block Diagram (Base Unit RF Part)------------------10
4.4. Circuit Operation (Base Unit) --------------------------11
4.4.1. BBIC (Base Band IC: IC501) ---------------------11
4.4.2. Flash Memory (IC601)------------------------------11
4.4.3. EEPROM (IC611) ------------------------------------11
4.4.4. Telephone Line Interface---------------------------12
4.4.5. Power Supply Circuit--------------------------------12
4.5. Block Diagram (Handset)-------------------------------14
4.6. Circuit Operation (Handset)----------------------------15
4.6.1. Outline --------------------------------------------------15
4.6.2. Power Supply Circuit/Reset Circuit--------------15
4.6.3. Charge Circuit ----------------------------------------15
4.6.4. Battery Low/Power Down Detector--------------15
4.6.5. Speakerphone ----------------------------------------15
4.7. Circuit Operation (Charger Unit) ----------------------16
4.7.1. Power Supply Circuit--------------------------------16
4.8. Behavior of Electric Power Failure -------------------17
4.8.1. Supply from handset --------------------------------17
4.8.2. Supply from large capacitor -----------------------17
4.9. Signal Route -----------------------------------------------18
5 Location of Controls and Components ------------------20
6 Installation Instructions ---------------------------------------20
7 Operating Instructions-----------------------------------------20
7.1. For Service Hint-------------------------------------------20
8 Service Mode -----------------------------------------------------21
8.1. Engineering Mode ----------------------------------------21
8.1.1. Base Unit ----------------------------------------------21
8.1.2. Handset ------------------------------------------------23
8.2. EEPROM LAYOUT (Handset)-------------------------25
8.2.1. Scope ---------------------------------------------------25
8.2.2. Introduction--------------------------------------------25
8.2.3. EEPROM contents ----------------------------------25
8.3. Copying Phonebook Items when Repairing -------26
8.4. How to Clear User Setting------------------------------28
8.4.1. Resetting both base unit and handset----------28
8.4.2. 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 ------------------------------31
9.1.3. Check Link---------------------------------------------32
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. Check Headset Transmission --------------------38
9.1.9. Check Headset Reception ------------------------ 38
9.1.10. Bell Reception---------------------------------------- 39
9.1.11. Check TAM Operation------------------------------ 39
9.1.12. Power failure mode --------------------------------- 40
9.2. Troubleshooting by Symptom (Base Unit and
Charger Unit)---------------------------------------------- 41
9.2.1. Check Point (Base Unit) --------------------------- 41
9.2.2. Check Point (Charger Unit) ----------------------- 42
9.3. Troubleshooting by Symptom (Handset)----------- 43
9.3.1. Check Point (Handset)----------------------------- 43
9.3.2. Troubleshooting for Speakerphone ------------- 46
10 Disassembly and Assembly Instructions--------------- 47
10.1. Disassembly Instructions------------------------------- 47
10.1.1. Base Unit ---------------------------------------------- 47
10.1.2. Handset------------------------------------------------ 49
10.1.3. Charger Unit ------------------------------------------ 50
10.2. How to Replace the Base Unit LCD----------------- 51
10.3. How to Replace the Handset LCD------------------- 53
11 Measurements and Adjustments -------------------------- 54
11.1. Equipment Required ------------------------------------ 54
11.2. The Setting Method of JIG (Base Unit)------------- 54
11.2.1. Connections ------------------------------------------ 54
11.2.2. How to install Batch file into P.C. ---------------- 55
11.2.3. Commands-------------------------------------------- 55
11.3. Adjustment Standard (Base Unit) -------------------- 56
11.3.1. Bottom View ------------------------------------------ 56
11.4. Adjustment Standard (Charger Unit) ---------------- 57
11.4.1. Bottom View ------------------------------------------ 57
11.5. The Setting Method of JIG (Handset)--------------- 58
11.5.1. Connections ------------------------------------------ 58
11.5.2. How to install Batch file into P.C. ---------------- 59
11.5.3. Commands-------------------------------------------- 59
11.6. Adjustment Standard (Handset) ---------------------- 60
11.6.1. Component View ------------------------------------ 60
11.7. Things to Do after Replacing IC or X'tal------------ 61
11.7.1. How to download the data ------------------------ 61
11.8. RF Specification ------------------------------------------ 63
11.8.1. Base Unit ---------------------------------------------- 63
11.8.2. Handset------------------------------------------------ 63
11.9. How to Check the Handset Speaker or
Receiver ---------------------------------------------------- 64
11.10. Frequency Table (MHz)--------------------------------- 64
12 Miscellaneous---------------------------------------------------- 65
12.1. How to Replace the Flat Package IC --------------- 65
12.1.1. Preparation-------------------------------------------- 65
12.1.2. How to Remove the IC----------------------------- 65
12.1.3. How to Install the IC -------------------------------- 66
12.1.4. How to Remove a Solder Bridge ---------------- 66
12.2. How to Replace the Shield Case--------------------- 67
12.2.1. Preparation-------------------------------------------- 67
12.2.2. Caution------------------------------------------------- 67
12.2.3. How to Remove the Shield Case---------------- 67
12.2.4. How to Install the Shield Case ------------------- 68
12.3. Terminal Guide of the ICs, Transistors, Diodes
and Electrolytic Capacitors ---------------------------- 69
12.3.1. Base Unit ---------------------------------------------- 69
12.3.2. Handset------------------------------------------------ 69
12.3.3. Charger Unit ------------------------------------------ 69

4
KX-TG8162ALB/KX-TG8163ALB/KX-TGA815AZB
13 Schematic Diagram--------------------------------------------- 70
13.1. For Schematic Diagram -------------------------------- 70
13.1.1. Base Unit (Base Unit (Main)) --------------------- 70
13.1.2. Handset (Handset) ---------------------------------- 70
13.1.3. Charger Unit (Charger Unit) ---------------------- 70
13.2. Base Unit (Main)------------------------------------------ 72
13.3. Base Unit (Operation) ---------------------------------- 74
13.4. Handset----------------------------------------------------- 76
13.5. Charger Unit ----------------------------------------------- 78
14 Printed Circuit Board ------------------------------------------ 79
14.1. Base Unit (Main)------------------------------------------ 79
14.1.1. Component View ------------------------------------ 79
14.1.2. Bottom View ------------------------------------------ 80
14.2. Base Unit (Operation) ----------------------------------- 81
14.2.1. Component View ----------------------------------- 81
14.3. Handset----------------------------------------------------- 83
14.3.1. Component View ------------------------------------ 83
14.3.2. Bottom View ------------------------------------------ 84
14.4. Charger Unit ----------------------------------------------- 85
14.4.1. Component View ------------------------------------ 85
14.4.2. Bottom View ------------------------------------------ 85
15 Exploded View and Replacement Parts List ----------- 86
15.1. Cabinet and Electrical Parts (Base Unit) ----------- 86
15.2. Cabinet and Electrical Parts (Handset)------------- 87
15.3. Cabinet and Electrical Parts (Charger Unit) ------- 88
15.4. Accessories------------------------------------------------ 89
15.5. Replacement Part List ---------------------------------- 90
15.5.1. Base Unit ---------------------------------------------- 90
15.5.2. Handset ------------------------------------------------ 92
15.5.3. Charger Unit ------------------------------------------ 94
15.5.4. Accessories ------------------------------------------- 94
15.5.5. Screws ------------------------------------------------- 94
15.5.6. Fixtures and Tools----------------------------------- 94

5
KX-TG8162ALB/KX-TG8163ALB/KX-TGA815AZB
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
1. Danger of explosion if battery is incorrectly replaced.
2. Replace only with the same or equivalent type recommended by the manufacturer.
3. Dispose of used batteries according to the manufacture’s Instructions.
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-TG8162ALB/KX-TG8163ALB/KX-TGA815AZB
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.
0.3mm X 100 g 0.6 mm X 100 g 1.0 mm X 100 g

7
KX-TG8162ALB/KX-TG8163ALB/KX-TGA815AZB
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
•DECT repeater: KX-A405AL
•Optional headset: KX-TCA89, RP-TCA430, RP-TCA400
Standard: GAP (Generic Access Profile)
Number of Channels: 120 Duplex Channels
Frequency Range: 1.88 GHz to 1.90 GHz
Duplex Procedure: TDMA (Time Division Multiple Access)
Channel Spacing: 1,728 kHz
Bit Rate: 1,152 kbit/s
Modulation: GFSK (Gaussian Frequency Shift Keying)
RF Transmission Power: Approx. 10mW (average power per channel)
Voice Coding: ADPCM 32 kbit/s
Operating conditions: 0°C - 40°C, 20 % - 80 % RH (Relative Humidity)
Power source (AC Adaptor): 220 - 240 V AC, 50/60 Hz
Base unit: PNLV226AL0Z
Charger: PNLV226AL0Z
Power consumption: Base unit:
Standby: Approx. 0.48 W
Maximum: Approx. 2.5 W
Charger:
Standby: Approx. 0.1 W
Maximum: Approx. 1.8 W
Dimensions: Base unit: Approx. 108 mm x 91 mm x 82 mm
Handset: Approx. 48 mm x 30 mm x 160 mm
Charger unit: Approx. 72 mm x 81 mm x 43 mm
Mass (Weight): Base unit: Approx. 160 g
Handset: Approx. 130 g
Charger: Approx. 50 g

8
KX-TG8162ALB/KX-TG8163ALB/KX-TGA815AZB
4 Technical Descriptions
4.1. Block Diagram (Base Unit)
Operational P.C. Board
D101
CHARGE_CONTACT
+
-
SP
X501
13.824 MHz
ANT2ANT1
TEL JACK
L1R L1T DCP DCM
DC JACK
RLY
LINE DETECT
SIDE TONE CIRCUIT
Q161
Q141
BELL DETECT
HOOK
BELL
Q111
LIN
LOUT
RF_PART
HSMIP
HSMIN
IC501
BBIC
INUSE DETECT 2
RECEIVE AMP
DCIN 1 and 3
IC301
VCCPA
VBAT_APU
VBAT
VCC_FE
VCC_IF
VCC_VCO
DCINS
CHARGE_DET
3.0V
DOUBOUT
SCL, SDA
WP
VCC
ANS_LED
LCD_BLT
IC601
FLASH MEMORY
IC611
EEPROM MEMORY
KEYS R151,R152
Q171
VBAT
DI,CS
MSG_LED
KEYIN 1~3
KEYS_C~E
SPOUTN
SPOUTP
3.0 V DC/DC CONVERTOR
Q351, Q352
CLK,DO
STM/CKM
R371 R372 D362
Q701, Q702
CHARGE DETECT
VCCA
VCC
SCL,RST
CS,CD,SIO
LCD
DCIN 2
CAP_SW
CAP_CHG
HS_SUPPLY_DET
BACKUP
CAP CIRCUIT
POWER
SUPPLY
CIRCUIT
FROM
PSTN
D151
Q910
POWER
SUPPLY
CIRCUIT
FROM
HS
C901
optional
optional
optional
optional
ANT2 ANT1 RXp RXn RXON TXp TXn TXON
RESET
RSTN
KX-TG8161 BLOCK DIAGRAM (BASE UNIT)

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KX-TG8162ALB/KX-TG8163ALB/KX-TGA815AZB
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 (Base Band IC): IC501
- Handling all the audio, signal and data processing needed in a DECT base unit
- Controlling the 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
- PLL Oscillator
- Detector
- Compress/Expander
- First Mixer
- All interfaces (ex: QSPI FLASH MEMORY, EEPROM, LED, Analog Front End, etc.)
- Integrated 1.9GHz PA for DECT
• EEPROM: IC611
- Temporary operating parameters (for RF, etc.)
• FLASH MEMORY: IC601
- Voice Prompt (TAM) D/L Area
- ICM/OGM Recording Area
• Additionally,
- Power Supply Circuit (+3.0 V output)
- Crystal Circuit (13.824 MHz)
- Charge Circuit
- Telephone Line Interface Circuit

10
KX-TG8162ALB/KX-TG8163ALB/KX-TGA815AZB
4.3. Block Diagram (Base Unit RF Part)
DA801
ANT2
ANT1
TXON
RXON
RXp
RXn
ANT2
ANT1
TXp
TXn
KX-TG8161 BLOCK DIAGRAM (Base Unit_RF Part)

11
KX-TG8162ALB/KX-TG8163ALB/KX-TGA815AZB
4.4. Circuit Operation (Base Unit)
General Description:
(BBIC, Flash Memory, EERROM) is a digital speech/signal processing system that implements all the functions of speechcom-
pression, record and playback, and memory management required in a digital telephone answering machine.The BBIC system
is fully controlled by a host processor. The host processor provides activation and control of all that functionsas follows.
4.4.1. BBIC (Base Band IC: IC501)
•Voice Message Recording/Play back
The BBIC system uses a proprietary speech compression technique to record and store voice message in Flash Memory.An
error correction algorithm is used to enable playback of these messages from the Flash Memory.
•DTMF Generator
When the DTMF data from the handset is received, the DTMF signal is output.
•Synthesized Voice (Pre-recorded message)
The BBIC implements synthesized Voice, utilizing the built in speech detector and a Flash Memory, which stored the vocabulary.
•Caller ID demodulation
The BBIC implements monitor and demodulate the FSK/DTMF signals that provide CID information from the Central Office.
•Digital Switching
The voice signal from telephone line is transmitted to the handset or the voice signal from the handset is transmitted to theTele-
phone line, etc. They are determined by the signal path route operation of voice signal.
•Block Interface Circuit
RF part, LED, Key scan, Speaker, Telephone line.
4.4.2. Flash Memory (IC601)
Following information data is stored.
•Voice signal
ex: Pre-recorded Greeting message, Incoming message
4.4.3. EEPROM (IC611)
Following information data is stored.
•Settings
ex: message numbers, ID code, Flash Time, Tone/Pulse
RF part
ADPCM
Analog
Front
End
&
Multi-
plexer
TEL
Line
Interface
Digital
Speech
Processor
Caller ID
Modem
Digital TAM System
Flash Memory IC601
Host CPU
BBIC (IC501)
DECT RF system
TDMA/TDD
Mod/Demod
PA/LNA ADPCM
Keys/ LEDs/ ChargeEEPROM IC611

12
KX-TG8162ALB/KX-TG8163ALB/KX-TGA815AZB
4.4.4. Telephone Line Interface
Telephone Line Interface Circuit:
Function
• Bell signal detection
• ON/OFF hook and pulse dial circuit
• Side tone circuit
Bell signal detection and OFF HOOK circuit:
In the idle mode, Q141 is open to cut the DC loop current and decrease the ring load. When ring voltage appears at the Tip (T)
and Ring (R) leads (When the telephone rings), the AC ring voltage is transferred as follows:
R →P101 →R111 →C111 →Q111 →BBIC pin 5
When the CPU (BBIC) detects a ring signal, Q141 turns on, thus providing an off-hook condition (active DC current flow
throughthe circuit). Following signal flow is the DC current flow.
T →D101 →Q141 →Q161 →R163 →R167 →R168 →D101 →P101 →R
ON HOOK Circuit:
Q141 is open, Q141 is connected as to cut the DC loop current and to cut the voice signal. The unit is consequently in an on-
hook condition.
Pulse Dial Circuit:
Pin 6 of BBIC turns Q141 ON/OFF to make the pulse dialing.
Side Tone Circuit:
Basically this circuit prevents the TX signal from feeding back to RX signal. As for this unit, TX signal feed back from Q161 is
canceled by the canceller circuit of BBIC.
4.4.5. Power Supply Circuit
The power supply voltage from AC adaptor is converted to VBAT (3.0V) in DC/DC converter circuit. And +3.0V for peripherals
and analog part is insulated from VBAT by Doubler of BBIC.
Circuit Operation:
5.5V
VBAT
RSTN(Reset)
pin 54
VBAT
pin 10
pin 57
pin 9
pin 15
IC501
Q301, IC301,
L301, C341 IC601
BBIC
DOUBLER OUT
For peripherals
VDDC (1.2V)
AC Adaptor
3.0V
DC/DC
CONVERTER
CIRCUIT
FLASH
IC611
EEPROM
+3.0V
STM/CKM
Receive
Amp.
RF Part
LCD BLT
ANS LED
MSG LED
Startmonitor
(IC501 57pin)
VDDC (1.2 V)
VBAT
Reset (RSTN)
(IC501_54 pin)
BBIC chip initialize
(CKM/STM)
LCD
(TAM COUNTER)

13
KX-TG8162ALB/KX-TG8163ALB/KX-TGA815AZB
4.4.5.1. Charge Circuit
The voltage from the AC adaptor is supplied to the charge circuits.
D362 R372 R371
CHARGE+
F301 DCP
CHARGE-
+5.5V
DCM

14
KX-TG8162ALB/KX-TG8163ALB/KX-TGA815AZB
4.5. Block Diagram (Handset)
QSPI FLASH MEMORY
IC4
SPEAKER
RECEIVER
Headset Jack
CN4
MIC
CHARGE
Power Failer Mode
Power Supply SW
CIRCUIT
Q2, Q3, Q4,Q2, Q3, Q4,
Q9, R8
Q9, R8
CHARGE CONTACTS
CHARGE(+)
CHARGE_CTRL BATTERY_ON
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
34 36
23 24
19 20 21 29
33 32 58 59
85
26
43 44
64 55 56 69 67
ADPCM
Codec
Filter
DSP
Speech
Decoding
Speech
Encoding
BMC
Burst
Decoding
ANT1
Burst
Encoding
RF
PLL
MOD/DEMOD
5 2 3
79 78
RXn
RXon
ANT1
DA801
RXp
TXp TXn TXon
9
10
XTAL
X1
10.368 MHz
BATTERY
45
ON SWITCH
KEYPAD
Charge
Pump
ROWS
COLUMNS
CP3V
D3
CP2.8V
CP_LED
49, 50, 51, 52
13, 14, 15, 16, 27,47
90, 92, 94, 96 QSPI-IO 0-3
BBIC
IC1
IC3
57
LCD-BACK LIGHT
KEY LED BELL LED
53 72
80
LDO_CTRL
CP 3.0 V
CP3V
QSPI
Control
91 QSPI-SCK
95 QSPI-CS
TGA815 only
71
Q10, Q11, Q12, R10Q10, Q11, Q12, R10
70
KX-TGA815 BLOCK DIAGRAM (Handset)

15
KX-TG8162ALB/KX-TG8163ALB/KX-TGA815AZB
4.6. Circuit Operation (Handset)
4.6.1. Outline
Handset consists of the following ICs as shown in Block Diagram (Handset) (P.14).
• 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.)
4.6.2. 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 →Q2 (1.8 V), IC1-43pin (3.0V)
The Reset signal generates IC1 (62 pin) and 1.8 V.
4.6.3. Charge Circuit
Circuit Operation:
When charging the handset on the Base Unit, the charge current is as follows;
DC+(5.5 V) →R371 →R372 →→CHARGE+(Base) →CHARGE+(Handset) →→Q3 →F1 →
BATTERY+... Battery...
BATTERY- →R45 →GND →CHARGE-(Handset)→CHARGE-(Base) →GND →DC-(GND)
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.12).
4.6.4. 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.
4.6.5. Speakerphone
The hands-free loudspeaker at SP+ and SP- is used to generate the ring alarm.
1.8 V
Reset
(IC1_62pin)
Battery +
R373
D362
Q2
R8

16
KX-TG8162ALB/KX-TG8163ALB/KX-TGA815AZB
4.7. Circuit Operation (Charger Unit)
4.7.1. Power Supply Circuit
The power supply is as shown.
D1R2R1 TP1
TP2
J1
AC Adaptor
F1

17
KX-TG8162ALB/KX-TG8163ALB/KX-TGA815AZB
4.8. Behavior of Electric Power Failure
This model can operate in power failure state by two temporary power sources.
One is supply from handset, the other is supply from large capacitor.
4.8.1. Supply from handset
When AC power is lost, base unit sends power failure information to handset. BBIC(IC1) turns Q11 on and, battery voltage appear
to CHG terminal.
When CHG+ (supply voltage from handset) is higher than Vbat, Q351 is on. And, this unit continues working in power failure condi-
tion.
It's possible to use the units during the power failure, supplying power to VBAT of base unit from battery of handset through Q10,
CHG terminal and Q351.
If emitter voltage is lower than collector, Q351 is OFF for the backflow prevention.
4.8.2. Supply from large capacitor
This model has PAS capacitor (CAP) to keep talking for only a limited time under the sudden power failure state.
CAP is charged at 2.5V in standby mode and charged at up to 3.0V in talk mode. Charge voltage is controlled by Q901 and Q902 to
extend the life time of CAP.
In case that the power from AC adapter is lost, BBIC(IC501) turns Q901 ON instantly and CAP supplies current to Vbat.
Q353 Q354
R351 R352
R353 R354
R360
Q352
R355
Q351
CHG+ Vbat
R45
Q11
R11
Q10
R12
R13
BBIC
IC1
71
Battery
CHG-
HA NDSET BA SE
BBIC
IC501
Vbat
R903
R923
R906 R918
R925
Q905
R917
R907
Q903
R902
R901
Q902
Q901
C901
82
71

18
KX-TG8162ALB/KX-TG8163ALB/KX-TGA815AZB
4.9. 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)
DTMF TONE
TEL IN
(from Tel Line)
SP-PHONE TX
(to Tel Line)
SP-PHONE RX
(from Tel Line)
Caller ID
(from Tel Line)
(BASE UNIT)
B - P101 - C121 - R121 - IC501 (25) IC501 (45) C812- L809 - DA801 - C895 -
A - C122 - R122 - IC501 (24) IC501 (44)
(BASE UNIT)
IC501 (28) - R181 - C184 - Q161 - Q141 - D101 A
(BASE UNIT)
A D101 - Q141 - Q161 - R164 - R177 - C173 - Q171 - C178 - R178 - IC501 (16)
(HANDSET)
MIC (+) - C13 - RA4 - IC1 (19) IC1(79) - L802
MIC (–) - C11 - RA4 - IC1 (20) IC1(78) - C813 C812 - DA801 - C803
- C801 - ANT to BASE
(BASE UNIT)
from HANDSET ANT1 - C894 DA802 - C895 - DA801 - C826
ANT2 - C893
IC501 (46)
IC501 (47)
IC501 (28) - R181 - C184 - Q161 - Q141 - D101 A
P101- B
P101- B
B - P101
IC501 (45) C812 - L809 - DA801 - C895 - DA802 C894 - ANT1
IC501 (44) to HANDSET
(HANDSET)
from BASE UNIT ANT - C801 - C803 - DA801 - C826
(BASE UNIT)
A D101 - Q141 - Q161 - R164 - R177 - C173 - Q171 - C178 - R178 - IC501 (16)
B - P101
C893 - ANT2
IC1 (3)
IC1 (2)
IC1 (23) - RECEIVER (+)
IC1 (24) - RECEIVER (–)
DA802 –– C894 - ANT1
– C893 - ANT2
to HANDSET
to HANDSET
(HANDSET)
MIC (+) - C13 - RA4 - IC1 (19) IC1(79) - L802
MIC ( ) - C11 - RA4 - IC1 (20) IC1(78) -
DA801 - C803 - C801 - ANT to BASE
(BASE UNIT)
from HANDSET ANT1 - C894 DA802 - C895 - DA801 - C826 IC501 (46)
ANT2 - C893
C813 C812 -
IC501 (47)
IC501 (28) - R181 - C184 - Q161 - Q141 - D101 –– A
– P101 - B
(HANDSET)
from BASE UNIT ANT - C801 - C803 - DA801 - C826
–– IC1 (3) ––– IC1 (34) - SP (–)
– IC1 (2) – – IC1 (36) - SP (+)
(BASE UNIT)
A D101 - Q141 - Q161 - R164 - R177 - C173 - Q171 - C178 - R178 - IC501 (16)
B - P101
–– IC501 (45) - C812 - L809 - DA801 - C895 - DA802 –– C894 - ANT1
– IC501 (44) – C803 - ANT2

19
KX-TG8162ALB/KX-TG8163ALB/KX-TGA815AZB
SIGNAL ROUTE ROUTE
IN OUT
SIGNAL
Memo/OGM
Recording
(from Handset)
ICM Recording
(from Tel Line)
(BASE UNIT)
from HANDSET ANT1 - C894 –– DA802 - C895 - DA801 - C826 –– IC501 (46) ––
IC501 (74) - IC601 (5)
ANT2 - C893 – – IC501 (47) –
(BASE UNIT)
A–––––––– D101 - Q141 - Q161 - R164 - R177 - C173 - Q171 - C178 - R178 - IC501 (16) -
B - P101–
IC501 (74) - IC601 (5)
Message Play
(to Handset)
(BASE UNIT)
IC601 (2) - IC501 (73) IC501 (45) C812 - L809 - DA801 - C895 -
(BASE UNIT)
IC601 (2) - IC501 (73) - IC501 (28) - R181 - C184 - Q161 - Q141 - D101 A
Message Play
(to Tel Line)
Message Play
(to Base Unit)
(BASE UNIT)
IC601 (2) - IC501 (73) IC501 (31) - L476 - SPp
IC501 (29) - L474 - SPn
(HANDSET)
MIC (+) - C13 - RA4 - IC1 (19) IC1(79) - L802
MIC ( ) - C11 - RA4 - IC1 (20) IC1(78) -
DA801 - C803 - C801 - ANT to BASE UNIT
C813 C812 -
IC501 (44)
DA802 C894 - ANT1
C893 - ANT2 to HANDSET
(HANDSET)
from BASE UNIT ANT - C801 - C803 - DA801 - C826 –– IC1 (3)
– IC2 (2)
IC1 (34) - SP (–)
IC1 (36) - SP (+)
P101 - B
Headset Tx
(to Tel Line)
(HANDSET)
CN4 (2) - L7 - R80 - C14 - R22 - IC1 (21) IC1 (79) - L802
fron Handset ANT1 - C894 DA802 - C895 - DA801 - C826 IC501 (46) IC501 (28)
IC1 (78) - C813 C812 - DA801 - C803 - C801 -
ANT to BASE
- R181 - C184 - Q161 - Q141 - D101
–– A
– P101 - B
to Handset
IC501 (47)ANT2 - C893
Headset Rx
(from Tel Line)
(BASE UNIT)
(BASE UNIT)
fron BASE UNIT
–– IC501 (45) –– C812 - L809 - DA801 - C895 - DA802 –– C894 - ANT1
– IC501 (44) – – C893 - ANT2
A ––––––– D101 - Q141 - Q161 - R164 - R177 - C173 - Q171 - C178 - R178 - IC501 (16)
B - P101–
ANT - C801 - C803 - DA801 - C826 –– IC1 (3) –– IC1 (23) - C16 - L8 - L9 - CN4 (5)
– IC1 (2) –
(HANDSET)

20
KX-TG8162ALB/KX-TG8163ALB/KX-TGA815AZB
5 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.
6 Installation Instructions
Refer to the Operating Instructions.
Note:
You can download and refer to the Operating Instructions (Instruction book) on TSN Server.
7 Operating Instructions
Refer to the Operating Instructions.
Note:
You can download and refer to the Operating Instructions (Instruction book) on TSN Server.
7.1. For Service Hint
Items Contents
Battery You could use other rechargeable batteries sold in a market, but the unit is not guaranteed to work
properly.
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 in the Operating
Instructions, you will get a correct indication of the battery strength.
PIN Code
Recall Earth Recall feature is not supported in this model.
LChange the PIN using the following method.
1
27
3Enter the new 4-digit base unit PIN. iMi{ic}
#
1(middle soft key) 132