Panasonic KX-TSC62SXB Manual de usuario

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of law.

ORDER NO. KM41103334CE

Telephone Equipment

Model No. KX-TSC62SXB

KX-TSC62SXW

Integrated Telephone System

B: Black Version

W: White Version

(for India)

Caller ID Compatible

KX-TSC62SXB/KX-TSC62SXW

WARNING

This service information is designed for experienced repair technicians only and is not designed for use by the general

public. It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting

to service a product. Products powered by electricity should be serviced or repaired only by experienced professional

technicians. Any attempt to service or repair the product or products dealt with in this service information by anyone

else could result in serious injury or death.

IMPORTANT SAFETY NOTICE

There are special components used in this equipment which are important for safety. These parts are marked by

in the Schematic Diagrams, Circuit Board Diagrams, Exploded Views and Replacement Parts List. It is essential that

these critical parts should be replaced with manufacturer's specified parts to prevent shock, fire or other hazards.

Do not modify the original design without permission of manufacturer.

IMPORTANT INFORMATION ABOUT LEAD FREE, (PbF), SOLDERING

If lead free solder was used in the manufacture of this product, the printed circuit boards will be marked PbF.

Standard leaded, (Pb), solder can be used as usual on boards without the PbF mark.

When this mark does appear, please read and follow the special instructions described in this manual on the

use of PbF and how it might be permissible to use Pb solder during service and repair work.

LWhen you note the serial number, write down all 11 digits. The serial number may be found on the bottom of the unit.

LThe illustrations in this Service Manual may vary slightly from the actual product.

KX-TSC62SXB/KX-TSC62SXW

TABLE OF CONTENTS

PAGE PAGE

1 Safety Precautions----------------------------------------------- 4

1.1. For Service Technicians --------------------------------- 4

2 Warning -------------------------------------------------------------- 4

2.1. About Lead Free Solder (Pbf: Pb free)--------------- 4

2.2. Discarding of P. C. Board-------------------------------- 5

3 Specifications ----------------------------------------------------- 6

4 Technical Descriptions ----------------------------------------- 7

4.1. Block Diagram---------------------------------------------- 7

4.2. Circuit Operation------------------------------------------- 8

5 Location of Controls and Components ------------------11

6 Installation Instructions ---------------------------------------11

7 Operating Instructions-----------------------------------------11

8 Troubleshooting Guide ----------------------------------------12

8.1. Service Hints-----------------------------------------------12

8.2. Set Dead----------------------------------------------------12

8.3. Pulse Dialing Problems ---------------------------------12

8.4. Tone Dialing Problems ----------------------------------13

8.5. No Ringing Sound When Ring Signal is Input ----13

9 Disassembly and Assembly Instructions ---------------14

9.1. Disassembly Instructions -------------------------------14

9.2. Assembly Instruction-------------------------------------16

10 Miscellaneous ----------------------------------------------------18

10.1. IC Block diagram -----------------------------------------18

10.2. How to Replace the Flat Package IC ----------------21

10.3. Terminal Guide of the ICs, Transistors and

Diodes -------------------------------------------------------23

11 Schematic Diagram ---------------------------------------------24

11.1. For Schematic Diagram---------------------------------24

11.2. Schematic Diagram (Main)-----------------------------26

11.3. Schematic Diagram (Operation) ----------------------28

12 Printed Circuit Board-------------------------------------------29

12.1. Circuit Board (Main)--------------------------------------29

12.2. Circuit Board (Operation) -------------------------------31

13 Exploded View and Replacement Parts List -----------33

13.1. Cabinet and Electrical Parts ---------------------------33

13.2. Accessories -----------------------------------------------34

13.3. Replacement Part List-----------------------------------35

KX-TSC62SXB/KX-TSC62SXW

1 Safety Precautions

1.1. For Service Technicians

•Repair service shall be provided in accordance with repair technology information such as service manual so as to pre-

vent fires, injury or electric shock, which can be caused by improper repair work.

1. When repair services are provided, neither the products nor their parts or members shall be remodeled.

2. If a lead wire assembly is supplied as a repair part, the lead wire assembly shall be replaced.

3. FASTON terminals shall be plugged straight in and unplugged straight out.

•ICs and LSIs are vulnerable to static electricity.

When repairing, the following precautions will help prevent recurring malfunctions.

1. Cover plastic parts boxes with aluminum foil.

2. Ground the soldering irons.

3. Use a conductive mat on worktable.

4. Do not grasp IC or LSI pins with bare fingers.

2Warning

2.1. About Lead Free Solder (Pbf: Pb free)

Note:

In the information below, Pb, the symbol for lead in the periodic table of elements, will refer to standard solder or solder that con-

tains lead.

We will use PbF solder when discussing the lead free solder used in our manufacturing process which is made from Tin (Sn),

Silver (Ag), and Copper (Cu).

This model, and others like it, manufactured using lead free solder will have PbF stamped on the PCB. For service and repair

work we suggest using the same type of solder.

Caution

• PbF solder has a melting point that is 50 F ~ 70 F (30 C ~ 40 C) higher than Pb solder. Please use a soldering iron with tem-

perature control and adjust it to 700 F ± 20 F (370 C ± 10 C).

• Exercise care while using higher temperature soldering irons.:

Do not heat the PCB for too long time in order to prevent solder splash or damage to the PCB.

• PbF solder will tend to splash if it is heated much higher than its melting point, approximately 1100 F (600 C).

• When applying PbF solder to double layered boards, please check the component side for excess which may flow onto the

opposite side (See the figure below).

component

solder

remove all of the

excess solder

slice view

KX-TSC62SXB/KX-TSC62SXW

2.1.1. 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 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.

2.2. Discarding of P. C. Board

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

0.3mm X 100g 0.6mm X 100g 1.0mm X 100g

KX-TSC62SXB/KX-TSC62SXW

3 Specifications

Note:

• Design and specifications are subject to change without notice.

Power Source: From telephone line

Memory Capacity: 30 Caller ID memory

Redial: The unit redials the last 5 dialed numbers

Microphone: Electret condenser microphone

Input Jack: Telephone Line

Approx. 202.5 mm x 76.5 mm x 130 mmDimensions (H x W x D):

Mass (weight): Approx. 453

Operating Enviroment: 0 oC - 40 oC, 20 % - 80 % relative air humidity (dry)

Speaker Unit: Unit: 5cm (2") PM Cone type 32

Handset: 3 cm (1

") PM dynamic type 150

KX-TSC62SXB/KX-TSC62SXW

4 Technical Descriptions

4.1. Block Diagram

MIC

KX-TSC62SX Series : BLOCK DIAGRAM

Keyboard

Switch

IC801

MICON

LCD

D808

Handset

Sending

Amp

Q431, Q433

Handset Receiving

Amp

Q401

Sidetone

Bridge

Q301, Q302

Line

ON/OFF

Circuit

ake Up Comparator

DTMF CID &

Gain Control

Circuit

Ring Detect

Circuit

Q554

Q503

Power Supply

Circuit

Q101, Q102, Q103

MIC

SP-Phone

Circuit

Q501, Q502

Q422

Ringer

D101 T

R201 C201

D413

D106

Buzzer

DTMF

Vdd

Wakeup

FSKIn

DTMF_Gain_Cnt

Bell in

XIN

XOUT

Vss

DTMFIn

D601

IC501

IC201

IC601

(2AP)

KX-TSC62SXB/KX-TSC62SXW

4.2. Circuit Operation

4.2.1. Bell Detector Circuit

When the bell signal is input from LINE to T/R (when the telephone rings), the signal is output at the buzzer via the following

path :

T/R C201 R201 IC201 (pin8) IC201 (pin5) R204 SW201 Buzzer

4.2.2. Telephone Line Interface

4.2.2.1. Circuit operation

•On hook

Q301 is OFF, on-hook condition where DC loop is disconnected and voice signal flow is cut.

•Off hook

During Off-Hook, pin 1-3 of SW301 and Q301 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(+) Q301 Q401 R412 D413 D101(-) L102 R

•Receiving signal flows:

LINE Q301 C402 C431 R431 Q431 C434 C438 R443 Q433 C440 SP (handset)

•Transmission signal flows:

MIC (handset) C422 R422 R423 C425 Q422 C429 R429 Q401 Q301 LINE

•Pulse Dial

A pulse signal switches repeatedly between high and low logic is output from IC801 (pin 56), on and off the line loop, generating

the pulse dial signal.

KX-TSC62SXB/KX-TSC62SXW

4.2.3. Speakerphone Circuit

4.2.3.1. Function

The circuit controls the automatic switching of the transmitted and received signals, to and from the telephone line, when the

unit is used in the hands -free mode.

4.2.3.2. Circuit Operation

The speakerphone can only provide a one-way communication path.

In other words, it can either transmit an outgoing signal or receive an incoming signal at a given time, but cannot do both simul-

taneously. Therefore, a switching circuit is necessary to control the flow of the outgoing and incoming signals.

This switching circuit is contained in IC601 and consists of a Voice Detector, TX Attenuator, RX Attenuator, Comparator and

Attenuator Control. The circuit analyzes whether the TX(transmit) or the RX(receive) signal is louder, and then it processed the

signals such that the louder signal is given precedence.

The Voice Detector provides a DC input to the Attenuator Control corresponding to the TX signal.

The Comparator receives a TX and a RX signal, and supplies a DC input to the Attenuator Control corresponding to the RX sig-

nal.

The Attenuator Control provides a control signal to the TX and the RX attenuator to switch the appropriate signals on and off.

The Attenuator Control also detects the level of the volume control to automatically adjust for changing ambient conditions.

1. Transmission signal path:

The input signal from the microphone is sent through the circuit via the following path: MIC Pin 9 of IC601 Pin 10 of

IC601 Pin 3 of IC601 Pin 4 of IC601 C602 R601 Q401 Tel line.

2. Reception signal path:

Signals receive from the telephone line are outputted at the speaker via the following path: Tel line Q431 C434 R600

C603 Pin 27 of IC601 Pin 26 of IC601 Pin 19 of IC601 Pin 15 of IC601 Speaker.

3. Transmission/Reception switching

The comparison result between TX and RX outputs as a DC level of Pin 25 of IC601. TX level is high ...... Pin 25 = Pin 21 -

6mV RX level is high ...... Pin 25 = Pin 21 - 150mVComparator output is connected to the attenuator control inside of IC601.

4. Voice detector

The output of the mic amp (Pin 10 of IC601) is supplied to Pin 13 of IC601 as a control signal for the voice detector.

5. Attenuator control

The attenuator control detects the setting of the volume control through Pin 24 of IC601 to automatically adjust for changing

ambient conditions.

KX-TSC62SXB/KX-TSC62SXW

4.2.4. Caller ID Detect Circuit

4.2.4.1. Function (FSK Signal)

The caller ID is a changeable ID which the user of a telephone circuit obtains by entering a contract with the telephone company to

utilize a caller ID service. For this reason, the operation of this circuit assumes that a caller ID service contract has been entered for

the circuit being used. The data for the caller ID from the telephone exchange is sent during the interval between the first and sec-

ond rings of the bell signal. The data from the telephone exchange is a modem signal which is modulated in an FSK (Frequency

Shift Keying) format. Data "1" is a 1200 Hz sine wave, and data “0” a 2200 Hz sine wave. There are two types of the message for-

mat which can be received: i.e. the single message format and plural message format. The plural message format allows to trans-

mit the name and data code information in addition to the time and telephone number data.

•FSK (Frequency Shift Keying) format

4.2.4.2. Circuit Operation

Caller ID signal is sent through the circuit via the following path :

LINE C501/C521 C502/C522 R501/R521 Pin 2/3 of IC501 Pin 1 of IC501 R507 C507 Pin 6 of IC501

Pin 60 of IC801

STD Ring / 20Hz

Tip-Ring

FSK DATA in

1st Ring Silent interval 2nd Ring

DATA

0.1Vrms

70Vrms

1300Hz or

1200Hz

=DATA "1"

2100Hz or

2200Hz

=DATA "0"

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