DOWNLOAD Panasonic KX-TS2358UAB / KX-TS2358UAW (serv.man3) Service Manual ↓ Size: 1.32 MB | Pages: 48 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 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: 0.3mm, 0.6mm and 1.0mm.

When discarding P. C. Board, delete all personal information such as telephone directory and caller list or scrap P. C. Board.

6

• Design and specification are subject to change without notice.
• Specifications are subject to change without notice.

*: Some functions may not work properly without batteries, Refer to the Operationg Instructions for details.

7

D3

, D5

C1

      D

1

PC1

    

R1

IC

1

D

4

, D

6

Q1

0

7

Q1

0

1

, Q1

0

2

, Q1

0

3

D1

0

1

T

       T

1

SP

R

MIC

IC

6

0

1

SP

D

302

MIC

D3

0

1

 IC

3

0

1

           IC

3

0

2

    4

.5

V

IC

8

5

1

B

a

tte

ry

 IC

3

0

3

IC

501,

 Q

502

LC

D

KX

-T

S2

3

5

8

 :

 BL

O

C

K DI

AG

RAM

Q4

0

1

, Q4

0

2

, Q4

0

3

Q

422

IC

801

MI

C

O

N

R

inge

r indic

a

tio

n LE

D

L

E

D

1

 (2

AP)

RI

NG

ER

IC

DR

IN

G

Li

ne

ON

/OF

F

H

andse

t

R

e

ce

iv

in

g

Am

p

TIPIN

S

ide

to

ne

Br

id

g

e

RE

SE

T

BA

TT

LO

W

R

e

s

e

t IC

H

a

ndse

t

Se

n

d

in

g

Am

p

Ke

yb

o

a

rd

Sw

it

ch

RIN

GIN

B

a

tte

ry

 L

o

w

De

te

c

to

r

Re

g

u

la

to

r

3.

3 V

FSK /

 DTM

F Ci

rc

u

it

W

a

ke

up C

ir

c

ui

t

WA

KEUP

RIN

G_D

ET

SP-

Ph

o

n

e

Ci

rc

u

it

 (2

AP)

8

When the bell signal is input between T/R, the signal are outputted at the speaker via the following path:
T / R 

→ R1 / C1 → D1 / LED1(2AP) → IC1 (pin1) → IC1 (pin8) → PC1 → C5 → SW2 → T1 → Speaker

When [AOH] button is pressed during bell rings, self ringing circuit will be activated.
IC801 (pin 70) is changed from low to high logic, causing Q103, Q101 to turn on,  and resulting the set  is in off-hook status.
The bell signal from T/R stops and starts generating from IC801 via the following path:
IC801 (pin 57) 

→ Q2 → SW2-2 → IC601 (pin 19) → IC601 (pin 15) → Speaker.

In talk status, SW101 become ON and Q102 base changes to high level, causing Q102, Q103, Q101 to turn on and resulting in
a line loop. The loop current flows from D101(+) 

→ Q101 → Q107 → R119 → D103 in that order, A pulse signal that repeated

switches between high and low logic is output from pin 73 of the CPU. This switches the line loop on and off, generating the dial
pulse signal.

• On hook

Q101 is OFF, on-hook condition where DC loop is disconnected and voice signal flow is cut.

• Off hook

Q101 is ON*, providing an off-hook condition (active DC current flow through the circuit) and the following is the signal flow:
T 

→ POS101 → L101 → D101(+) → Q101 → Q107 → R119 → D103 → D101(-) → L102 → R

*  Handset mode : SW101 ON after handset off-hook
*  SP-Phone mode : IC801 (pin 70) output high logic after pressing SP-Phone button. 

• The receiving signal flows:

LINE 

→ Q101 → C109 → C401 → R401 → Q401 → Q402 → Q403 → SP (handset)

• The transmission signal flows

MIC (handset) 

→ Q422 → R433 → C432 → Q107 → Q101 → LINE

This circuit is used to sense the status of the line (busy tone or dial tone) during dummy ring generation and Auto Redial.

D101 

→ Q101 → C201 → R201 → R205 → Pin 5 of IC201 → Pin 1 of IC201 → D202 → R208 → Q201 → Pin 87 of IC801.

When the subscriber hangs-up, check the intermittent tone. If cycle tone is detected, the collector of Q201 goes to a low logic.