DOWNLOAD Panasonic KX-TG8551CAB / KX-TG8561CAB / KX-TGA855RUB Service Manual ↓ Size: 8.49 MB | Pages: 103 in PDF or view online for FREE

6

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.

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

*1 KX-TG8551
*2 KX-TG8561

• Design and specifications are subject to change without notice.

• Operation range: Up to 300 m outdoors, Up to 50 m indoors, depending on the condition.
• Analog telephone connection: Telephone Line
• DECT repeater: KX-A405
• Optional headset: KX-TCA94EX 

DECT (Digital Enhanced Cordless Telecommunications), GAP (Generic Access Profile)

120 Duplex Channels

1.88 GHz to 1.90 GHz

TDMA (Time Division Multiple Access)

1,728 kHz

1,152 kbit/s

GFSK (Gaussian Frequency Shift Keying)

Approx. 10mW (average power per channel)

ADPCM 32 kbit/s

0

°C - 40°C, 20 % - 80 % RH (Relative Humidity)

220 - 240 V AC, 50/60 Hz
Base unit: PNLV226CE0Z
Charger: PNLV226CE0Z 

Standby: Approx. 0.38 W
Maximum: Approx. 2.4 W
Base unit

Standby: Approx. 0.48 W
Maximum: Approx. 2.5 W
Charger:
Standby: Approx. 0.1 W
Maximum: Approx. 1.8 W

Base unit

*1

: Approx. 103 mm x 106 mm x 43 mm

Base unit

*2

: Approx. 112 mm x 121 mm x 43 mm

Handset: Approx. 48 mm x 25 mm x 150 mm
Charger unit: Approx. 72 mm x 76 mm x 43 mm 

Base unit

*1

: Approx. 120 g

Base unit

*2

: Approx. 170 g  

Handset: Approx. 110 g  
Charger: Approx. 50 g  

8

Analog

Front

End

To TEL_LINE

Bridge

Rect D101

Hook Switch

Q141, Q142, Q161

Audio

Bell/Caller ID

Interface

CPU

MICn

LSRp

RINGn

CIDINp

CIDINn

CIDOUT

RINGOUT

BELL

HOOK

CHARGE_DET

Off-Hook Line Voltage

P

ARADET

A/D

D/A

ADPCM

Codec Filter

DSP

Speech Encoding

Speech Decoding

BMC

Burst Encoding

Burst Decoding

RF

PLL

XT

AL2

XT

AL1

EEPROM

SCL

SDA

To AC Adaptor

To HANDSET

Limit

Re

s

is

tor

R

3

71, R

3

72,

D

3

62

Charge

Detector

Power Failer Mode

Power Supply SW

      Q351,IC351

CHARGE(+)

CHARGE(-)

Optional

for KX-TG8561 only

Optional

DC/DC con

v

e

rt

o

D

C

/D

C

 c

o

n

v

e

rt

o

r

IC

3

02,L

3

01,

IC

3

0

2

,L

3

0

1

,

C

3

42,Q

3

10

C

3

4

2

,Q

3

1

0

Q

3

02
Q

3

0

2

Q

3

01
Q

3

0

1

2.4V

Reg.

1.8V

Reg.

2.85 V

2.4 V

1.8 V

BBIC

KX-TG8551/TG8561 BLOCK DIA

GRAM (BASE UNIT)

MOD/DEMOD

Charge

Pump

DCDC

Converter

Re

s

et

CP_VO

YT2

XTAL

X501X

5

0

1

10.368

MHz

RX

n

RX

p

TX

p

TX

n

TX

on

RX

on

D801

ANT1

ANT2

ANT1

ANT2

ANT1

ANT2

L1

L2

DCP

DCM

FLASH MEMORY

QSPI

FLASH MEMORY

CP_VO

YT1

3.0V

3.0V

RSTN

pin 62:

 TG855x

pin 77:

 TG856x

TAM-CSn

SPI-DI 
SPI-DO

SPICLK

QSPI-CS

DC-SENSE

DC-CTRL

QSPI-SCK

QSPI-IO 0-3

Q701, Q702

CD_I

QSPI

Control

9

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.)
- DCDC Converter
- Integrated 1.9GHz PA for DECT

• EEPROM: IC611

- Temporary operating parameters (for RF, etc.)

• FLASH MEMORY: IC601 (for KX-TG8561 only)

- Voice Prompt (TAM) D/L Area
- ICM/OGM Recording Area

• 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

• QSPI FLASH MEMORY IC502

- Main Program D/L Area