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Model
KX-TG6811CAB KX-TG6811CAM KX-TG6812CAB KX-TG6821CAB KX-TG6821CAM KX-TG6822CAB KX-TGA681RUB KX-TGA681RUM
Pages
95
Size
7.58 MB
Type
PDF
Document
Service Manual
Brand
Device
Telephone / DIGITAL CORDLESS ANSWERING SYSTEM
File
kx-tg6811cab-kx-tg6811cam-kx-tg6812cab-kx-tg6821ca.pdf
Date

Panasonic KX-TG6811CAB / KX-TG6811CAM / KX-TG6812CAB / KX-TG6821CAB / KX-TG6821CAM / KX-TG6822CAB / KX-TGA681RUB / KX-TGA681RUM Service Manual ▷ View online

7
KX-TG6811CAB/KX-TG6811CAM/KX-TG6812CAB/KX-TG6821CAB/KX-TG6821CAM/KX-TG6822CAB/KX-TGA681RUB/KX-TGA681RUM
3 Specifications
*1 KX-TG6811
*2 KX-TG6821
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 DECT repeater: KX-A405
• Optional Key finder: KX-TGA20RU
Standard:
DECT (Digital Enhanced Cordless Telecommunications), 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 % relative air humidity (dry)
Power source (AC Adaptor):
220 - 240 V AC, 50/60 Hz
Base unit: PNLV226CE0Z
Charger: PNLV233CEKZ 
Power consumption:
Base unit
*1
:
Standby: Approx. 0.6 W
Maximum: Approx. 2.5 W
Base unit
*2
:
Standby: Approx. 0.8 W
Maximum: Approx. 3.1 W
Charger:
Standby: Approx. 0.12 W
Maximum: Approx. 1.8 W
Dimensions:
Base unit: Approx. 107 mm x 86 mm x 77 mm
Handset: Approx. 48 mm x 29 mm x 164 mm
Charger unit: Approx. 70 mm x 70 mm x 39 mm 
Mass (Weight):
Base unit
*1
: Approx. 100 g
Base unit
*2
: Approx. 120 g  
Handset: Approx. 130 g  
Charger: Approx. 40 g  
8
KX-TG6811CAB/KX-TG6811CAM/KX-TG6812CAB/KX-TG6821CAB/KX-TG6821CAM/KX-TG6822CAB/KX-TGA681RUB/KX-TGA681RUM
4 Technical Descriptions
4.1.
Block Diagram (Base Unit)
Oper
ational P
.C
. Board
D101
CHARGE_CONT
A
C
T
+
-
SP
X501
13.824 MHz
ANT
2
ANT
1
TEL
 J
A
CK
L1R
L1T
DCP
DCM
DC J
A
CK
RL
Y
LINE
DETECT
SIDE T
O
NE
CIRCUIT
Q161
Q141
BELL
 
DETECT
HOOK
BELL
Q
111
LIN
LOUT
RF_P
AR
T
HSMIP
HSMIN
IC501
BBIC
INUSE
DETECT
 2
RECEIVE
AMP
DCIN 1 and 3
IC302
VCCP
A
VBA
T_APU
VBA
T
VCC_FE
VCC_IF
VCC_VCO
DCINS
CHARGE_DET
3.0V
DOUBOUT
SCL, SDA
WP
VCC
IC601
FLASH
MEMOR
Y
IC61
1
EEPR
OM
MEMOR
Y
KEYS
R151,R152
Q171
DI,CS
MSG_LED
KEYIN 1~3
KEYS_C~E
SPOUTN
SPOUTP
3.0 V
REGULA
T
O
R
Q351,
 Q352
CLK,DO
STM/CKM
R371
R372
D362
Q701, Q702
CHARGE
DETECT
VCCA
VCC
SCL,RST
CS
,CD,SIO
DCIN 2
CAP
_
SW
CAP_CHG
HS_SUPPL
Y_DET
BA
CKUP
CAP
 CIRCUIT
PO
WER
SUPPL
Y
CIRCUIT
FR
OM
HS
C901
optional
optional
TG6721 only
TG6721 only
ANT2
ANT1
RXp
RXn
RXON
TXp
TXn
TXON
RESET
RSTN
KX-TG681
1/6821 BLOCK DI
A
GRAM 
(BASE UNIT)
LED
T
AM counter P
.CBoard
9
KX-TG6811CAB/KX-TG6811CAM/KX-TG6812CAB/KX-TG6821CAB/KX-TG6821CAM/KX-TG6822CAB/KX-TGA681RUB/KX-TGA681RUM
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 (for KX-TG6821 only)
- 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
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KX-TG6811CAB/KX-TG6811CAM/KX-TG6812CAB/KX-TG6821CAB/KX-TG6821CAM/KX-TG6822CAB/KX-TGA681RUB/KX-TGA681RUM
4.3.
Block Diagram (Base Unit RF Part)
DA802
ANT2
ANT1
RXp
RXn
ANT2
ANT1
TXp
TXn
KX-TG6811/6821 BLOCK DIAGRAM (Base Unit_RF Part)
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