TOSHIBA SX2009 Service Manual

Teléfonos inalámbricos

Contenido y precauciones de seguridad

Controles de operación

SX-2009

Procedimientos de alineamiento

Diagrama a bloques

Diagramas esquemáticos

Procedimiento de localización de fallas

Carta de voltajes de transistores y de IC

Identificación de terminales de semiconductores

Localización de partes eléctricas

Diagramas de conexiones (alambrado)

Vistas explotadas y lista de partes mecánicas

Lista de partes

Lista de partes del ensamble

Especificaciones

FILE NO. 2B0-9910

SERVICE MANUAL

CORDLESS TELEPHONE

SX-2009

PUBLISHED IN JAPAN, Nov., 1999

CONTENTS

SAFETY PRECAUTIONS...................................................................................................................... 1

OPERATING CONTR OLS..................................................................................................................... 2

ALIGNMENT PROCEDURE.................................................................................................................. 3

BLOCK DIAGRAMS .............................................................................................................................. 6

SCHEMATIC DIA GRAMS...................................................................................................................... 8

TROUBLESHOOTING HINTS ............................................................................................................. 12

IC AND TRANSISTOR VOLTAGE CHART ........................................................................................... 18

SEMICONDUCTOR LEAD IDENTIFICATION ..................................................................................... 22

ELECTRICAL PARTS LOCATION .......................................................................................................24

WIRING DIAGRAMS ........................................................................................................................... 26

EXPLODED VIEW AND MECHANICAL PARTS LIST.......................................................................... 28

PARTS LIST ........................................................................................................................................ 32

ASSEMBLY PARTS LIST..................................................................................................................... 41

SPECIFICATIONS ............................................................................................................................... 42

SAFETY PRECAUTIONS

Before returning any models to the customer, a safety check of the entire instrument should be made. The service technician must be sure that no protective device built into the instrument by the man ufacture has become defective or inadvertently degraded during servicing.

1.WARNING:

Alterations of the design or circuitry of these models should not be made.

Any design changes or additions such as, but not limited to, circuit modifications, auxiliary speaker jacks, switches, grounding, active or passive circuitry, etc. may alter the safety characteristics of these models and potentially create a hazardous situation for the user.

Any design alterations or additions will void the manufacturer’s warranty and will further relieve the manufacturer of responsibility for personal injury or property damage resulting therefrom.

2.PRODUCT SAFETY NOTICE

Many electrical and mechanical parts in this chassis hav e special characteristics. These characteristics often pass unnoticed and the protection afforded by them cannot necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts that have these special safety characteristics are identified in this manual and its supplements; electrical components having such f eatures are identified b y a any of these components, read the parts list in this manual carefully. The use of substitute replacement parts that do not have the same safety characteristics as specified in the parts list may create shock, fire or other hazards.

in the schematic diagram and the parts list. Before replacing

OPERATING CONTROLS

HANDSET CONTROLS AND FUNCTIONS

Headset Jack

TALK/BATT LOW LED

SPREAD SPECTRUM

Antenna

RDL/P (Redial/Pause) Button

TALK Button

TONE Button

MEM Button

MUTE Button

One-Touch dialing button

( MEM1 - MEM4 )

Rechargeable Battery Pack

(back)

BASE UNIT CONTROLS

DC IN 9V Jack

LINE Modular Jack

RDL/P

MEM MUTE VOL/RING

MEM1 MEM2

MEM3 MEM4

SPREAD SPECTRUM

CORDLESS TELEPHONE SX-2009

FLASH Button

Dialpad

VOL/RING Button

Charging Contact

T-P (Tone-Pulse) Switch

Charging Contact

Antenna

IN USE/CHARGE LED

PAGE Button

Base Unit

Transmitter Section

ALIGNMENT PROCEDURE

Connections

Power

Meter

RF T est

Point

BASE Main Unit

PCB J3

DC IN

DC9V

Adapter

AC 120V

60Hz

Preset

a) Connect the “TXPWR0 (TP312)” and “TXPWR1 (TP324)” to “G (TP322)” with using wires. b) Remove the plug J8 from the J7. c) Supply the DC Power to Base Main PCB (J3). d) Press the TALK button on Handset unit to link Base with Handset unit.

Alignment Procedure

step

Adjutment

RT301

Remarks

Connect the P o w er Meter to RF test point on the Base Main PCB. Adjust RT301 for 11 dBm ±0.5 dB reading on the Pow er Meter.

Alignment Point Location on Base Main PCB and Base RF PCB

Base Main PCB

RF PCB

TXPWR1(TP324) TXPWR0(TP312)

G(TP322)

RT301

J3 DC IN

RF TEST POINT

Handset Unit

Transmitter Section

Connection

HANDSET Main Unit

Power

Meter

J607

RF T est

Point

PCB J603

DC IN

DC3.8V

Preset

a) Connect the “TXPWR0 (TP512)” and “TXPWR1 (TP524)” to “G (TP522)” with using wires. b) Remove the plug J606 from the J607. c) Supply the DC Power to HANDSET Main PCB (J603). d) Press the TALK button on Handset unit to link Base with Handset unit.

Alignment Procedure

PWR

Supply

step

Adjutment

Remarks

Connect the Po w er Meter to RF test point on the HANDSET Main PCB.

RT501

Adjust RT501 for 11 dBm ±0.5 dB reading on the Pow er Meter.

Alignment Point Location on Handset Main PCB and Handset RF PCB

Handset Main PCB

J603

TXPWR1

RF TEST POINT

TXPWR0

(TP215)

G(TP522)

(TP524)

RF PCB

RT501

J607

Receiver Section

Connection

AF Gen. BASE Main Unit HANDSET Main Unit AC Volt Meter

(Zo=600ohm)

1kHz

-19.8dBm J2

TEL JACK

Link

J3 DC JACK

Adapter

AC 120V

60Hz

Preset

a) Supply the DC Power to HANDSET Main PCB (J603). b) Supply the DC Power to BASE Main PCB (J3). c) Press the TALK button on Handset unit to link Base with Handset unit. d) Set the Handset to SP VOL “LO” position. e) Press the MUTE button on Handset unit.

Alignment Procedure

step

Adjutment

RT601

Remarks

Connect the AF Generator to the TEL JACK (J2) on the Base Main PCB. Make sure that the output is 1 kHz -19.8 dBm from the AF Generator. Connect the AC Voltmeter across a 150 ohm load to the SP connector. Adjust RT601 for -28 dBV ±0.5 dB reading on the AC Voltmeter.

WHT(+)

Test Point

BLK(-)

J603

DC IN

Dummy Load

(Z=150ohm)

DC Power Supply

DC3.8V

Alignment Point Location on Handset Main PCB and Handset RF PCB

Handset Main PCB

J603

RF PCB

RT601

AF TEST POINT

Base Unit

BLOCK DIAGRAMS

Handset Unit

Base Unit

SCHEMATIC DIAGRAMS

Handset

TROUBLESHOOTING HINTS

1. The bell does not ring.

When the PAGE SW of the base is pressed, does the ringer on the handset ring?

When the TEL SG is joined with the base to make bell signal, is there pulse wave at pin 6 of IC7?

Check IC7 and its peripheral circuit.

See 2. The bell does not ring & page does not ring.

Check IC5 and TEL netw ork circuit.

2. The bell does not ring & page does not ring.

Can the base and handset be connected?

Press handset DIAL key while in TALK MODE. Can key touch sound be heard from the ringer?

See 3. The base and handset cannot be connected.

When the key of the handset is pressed, can the pulse output at pin 44 of IC604 be seen?

At the Q620 collector, can the pulse wave be seen?

At the Q613 collector, can the pulse wave be seen?

Check RINGER Y601.

Check IC604.

Check R647, R653 and Q608.

Check R645 and Q621.

When the PAGE SW of the base is pressed, does pin 58 of IC7 change from low to high?

Check IC7 and IC604.

Check R55, R77 and S1.

3. The base and handset cannot be connected. Base Unit

Check whether D2 will light when the power is turned on.

Check whether the base transmit data intermittently.

Check IC7.

Handset Unit

Check whether D601 flashes when the power is turned on.

Check whether the power line is shorted.

Check RF unit.

Check whether the power line is shorted.

Check whether the handset transmit data intermittently.

Check IC604.

Check RF unit.

+ 31 hidden pages