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Model
KX-TG5511RUB KX-TG5511RUC KX-TG5511RUJ KX-TG5511RUW KX-TGA550RUB KX-TGA550RUC KX-TGA550RUJ KX-TGA550RUW KX-TGA551RUB KX-TGA551RUC KX-TGA551RUJ KX-TGA551RUW KX-TG5512RUB KX-TG5511RUR (serv.man3)
Pages
86
Size
2.7 MB
Type
PDF
Document
Service Manual
Brand
Device
Telephone / DIGITAL CORDLESS PHONE
File
kx-tg5511rub-kx-tg5511ruc-kx-tg5511ruj-kx-tg5511ru.pdf
Date

Panasonic KX-TG5511RUB / KX-TG5511RUC / KX-TG5511RUJ / KX-TG5511RUW / KX-TGA550RUB / KX-TGA550RUC / KX-TGA550RUJ / KX-TGA550RUW / KX-TGA551RUB / KX-TGA551RUC / KX-TGA551RUJ / KX-TGA551RUW / KX-TG5512RUB / KX-TG5511RUR (serv.man3) Service Manual ▷ View online

5
KX-TG5511RU/KX-TGA550RU/KX-TGA551RU
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
6
KX-TG5511RU/KX-TGA550RU/KX-TGA551RU
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
 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. 10 m W (average power per channel) 
   Power source (AC Adaptor):
220–240 V AC, 50/60 Hz
   Power consumption
Base unit: PQLV219CEW
Base unit:
Charger: PQLV219CEW
Standby: Approx. 0.45 W
Maximum: Approx. 3.8 W
Charger:
Standby: Approx. 0.2 W
Maximum: Approx. 3.0 W
   Operating conditions:
0
°C–40 °C, 20 %–80 % relative air humidity (dry) 
   Dimensions:
Base unit:
 Approx. 97 mm x 117 mm x 50 mm
Handset: Approx. 47 mm x 25 mm x 148 mm
Charger: Approx. 72 mm x 79 mm x 52 mm
   Mass (weight):
Base unit:
 Approx. 125 
g
Handset: Approx. 115 
g
Charger: Approx. 55 
g
 Voice coding:
ADPCM 32 kbit/s
7
KX-TG5511RU/KX-TGA550RU/KX-TGA551RU
4 Technical Descriptions
4.1.
Block Diagram (Base Unit)
Analog
Front
End
To TEL_LINE
Bridge
Rect
 D3 D
3
Hook Switch
Q3,Q4,Q5Q
3
,Q
4
,Q
5
Audio
Bell/Caller ID
Interface
CPU
18
16
23
20
21
19
24
BELL
HOOK
Off-Hook Line Voltage
25
A/D
D/A
ADPCM
Codec Filter
DSP
Speech Encoding
Speech Decoding
BMC
Burst Encoding
Burst Decoding
RF
PLL 
5
3
77
75
9
10
EEPROM
SCL
SDA
57
58
44
Charge
Detector
(Optional)
BBIC
IC401
IC7 
KX-TG5511 BLOCK DIAGRAM 
(BASE UNIT)
MOD/DEMOD
Charge
Pump
43
2.5V
XTAL
X1X
1
10.368
MHz
IC801
RX
n
RX
p
TX
p
TX
n
P
on
PSEL
V
DD
-PADRV
4
3
6
7
TX
on
RX
on
D801
6
72
ANT1
ANT2
9
8
ANT1
ANT2
RF PA
ANT1
ANT2
78
73
74
80
L1
L2
2
To AC Adaptor
Limit
Resistor
CHARGE 
CONTACT
IC2IC
2
Q9Q
9
Q8Q
8
2.4V
Reg.
1.8V
Reg.
3.0 V
2.4 V
1.8 V
DCP
DCM
IC3IC
3
8
KX-TG5511RU/KX-TGA550RU/KX-TGA551RU
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.7).
• DECT BBIC (Base Band IC): IC7
- 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: RF Power Amp, EEPROM, LED, Analog Front End, etc.)
• RF Power Amp.: IC801
- Amplifier for transmission and reception
• EEPROM: IC401
- Temporary operating parameters (for RF, etc.)
• Additionally,
- Power Supply Circuit (+3.0 V, +2.4 V, +1.8 V output)
- Crystal Circuit (10.368 MHz)
- Charge Circuit
- Telephone Line Interface Circuit
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