DOWNLOAD Panasonic KX-TS2570RUB / KX-TS2570RUW Service Manual ↓ Size: 1.72 MB | Pages: 47 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. 

The location of the “PbF” mark is subject to change without notice.

CN801

MIC

17

18

1

2

PQUP11371Z

A

PbF

6

7

KX-TS2570 BLOCK DIAGRAM

T

1

D3, D5

C1

PC1

R1

IC1

D4, D6

Speaker

Q

103, Q

104

D7, D9

T

2AP

R

Q4

0

1

D8

, D1

0

   M

IC

D

306

D

304

IC

304

Q

701

Q

702

    6.5V

DC Po

w

e

r

IC

903

IC

902

IC

303, Q

301

LC

D

IC

305

H

andset / H

eadset

MIC

SP

IC

904

Q

402

Q

108

Ri

nger i

ndi

c

a

ti

on LE

D

LE

D 804 (1A

P

 - S

U

B

)

IC

901

DSP M

ICON

Key

boar

d

Sw

itc

h

RINGER

IC

BELL

Line

O

N

/O

FF

H

andset

Sending

Am

p

H

eadset

D

e

tection

FLA

S

H

ME

MO

R

Y

CIDI

N+

CIDI

N -

V

SP-Phone

Am

p

MI

C -

LS

R +

Headset

DE

T

MI

C +

LS

R  -

LI

N

E

 I

N

 -

L

INE

 OUT

Sidetone

Bridge

R

eg.

1.8V

R

eg.

3.2V

RS

T

n

VDD,

 A

V

D

VDDI

O

VBA

T

2

Reset IC

R

egulator

4.0V

R

egulator

4.0V

ACFL

Pow

er Dow

n

D

e

tection

8

The unit consists of the following ICs as shown in the BLOCK DIAGRAM

• BBIC (Base Band IC): IC901

- Handling all the audio, signal and data processing needed
- ADPCM codec filter for speech encoding and speech decoding (DSP section)
- Echo-cancellation and Echo-suppression (DSP section)
- Any tones (tone, sidetone, ringing tone, etc.) genereation (DSP section)
- DTMF receiver (DSP section)
- ADC, DAC, timer and power control circuitry
- All interfaces (eg: LCD, LED, Analog Front End, etc.)

• FLASH MEMORY : IC902

- Voice Prompt (TAM) Download Area
- Program D/L Area

• RINGER IC : IC1

- Bell signal generator (for bell detection purpose)

• SP AMP : IC904

- Low voltage audio power amplifier

• Additionally,

- Power Supply Circuit (+4.0V, +4.0V, +3.2V, +1.8V output)
- Telephone Line Interface Circuit
- Bell Detection Circuit
- SP-Phone Circuit
- Handset Circuit
- TAM  Circuit

The power is supplied to the BBIC, Flash ROM, SP AMP, Logic IC, LCD, LED from AC adaptor (6.5V)
as below :

• BBIC (IC901): CN301 -> D304 -> IC304 -> Q702 -> IC901 (3.2V)
• BBIC (IC901): CN301 -> D304 -> IC304 -> D701 -> Q701 -> IC901 (1.8V)
• Flash Memory (IC902): CN301 -> D304 -> IC304 -> Q702 -> IC902
• Logic IC (IC905): CN301 -> D304 -> IC304 -> Q702 -> IC905
• SP AMP (IC904): CN301 -> IC305 -> IC904
• LCD (LCD): CN301 -> D304 -> IC304 -> Q702 -> L302 -> LCD
• LED (LED801, LED802): CN301 -> IC305 -> L301 -> CN403 -> CN801 -> LED