DOWNLOAD Panasonic KX-TG8288UAT / KX-TG8287UAT / KX-TGA828UAT / KX-TGA828RUT Service Manual ↓ Size: 3.09 MB | Pages: 113 in PDF or view online for FREE

5

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 manufac-
turer’s specific instructions for the melting points of their products and any precautions for using their product with other materi-
als. 
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.

6

7

TX

LINE1

T

R

CN101

CN301

Bridge

PC102

Q101, Q102

D101

HOOK

SW

Hybrid

Q105

CPU

Analog Front End 1

D/A

A/D

Analog Front End 2

D/A

A/D

Burst Encoding

Burst Decoding

Speech Encoding

Speech Decoding

RF

Interface

28

26

TXDA

RXDA

25

12

40

36

RSSI

SYCL

SYDA

SYEN

ANT1

ANT2

RF Module

18

16

31

2

8

21

14

13

12

EEPROM

SCL

CS

CS

42

83

80

79

94

84

SDA

6

5

66

67

9

10

11

23

12

102

100

101

11

Caller ID

Bell

L1 Bell

RX

TX

RX

81

AC Adaptor

3.3V Reg.

4V Reg.

3V Reg.

2.5V Reg.

1.8V Reg.

3.3V

4V

2.5V

1.8V

3V

BBIC

Q302

Q301

LINE2

T

R

CN201

Bridge

Q201, PC202

D201

HOOK

SW

Hybrid

Q205

118

110

114

13

Caller ID

Bell

In use

In use

L2 Bell

L2 Bell

L1 Bell

41

SP-Phone/TAM

DATA Bus

Address Bus

Flash (Program)

LCD Drive

LED Drive

Key matrix

4

3

2

8

1

Flash (TAM)

TAM-RESET

SPI CLK

SPI DI

SPI DO

KX-TG8288 BLOCK DIA

GRAM (BASE UNIT)

21

22

XTAL

X

5

0

1

10.368MHz

8

Base Unit consists of the following ICs as shown in Block Diagram (Base Unit) (P.7).

• 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
- All interfaces (ex: RF module, EEPROM, LED, Analog Front End, etc.)

• RF Module: IC801

- PLL Oscillator
- Detector
- Compress/Expander
- First Mixer
- Amplifier for transmission and reception

• EEPROM: IC502

- Temporary operating parameters (for RF, etc.)

• FLASH MEMORY 1: IC602

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

• TAM Companion: IC601

- Voice data compression and decompression
- Speaker Amp

• Additionally,

- Power Supply Circuit (+4.0V, +3.3V, +2.5V, +1.8V output)
- Crystal Circuit (10.368MHz)
- Charge Circuit
- Telephone Line Interface Circuit

• FLASH MEMORY 2: IC603

- Program DL

• LED Driver: IC606
• LCD Driver: IC607/IC608
• Key Matrix: IC605