TOSHIBA FD-9839 Service Manual

Teléfonos inalámbricos

Contenido y precauciones de seguridad

Controles de operación

FD-9839

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. 2B0-9911

SERVICE MANUAL

CORDLESS TELEPHONE

FD-9839

PUBLISHED IN JAPAN, Dec., 1999

CONTENTS

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

OPERATING CONTROLS........................................................................................................... 2

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

BLOCK DIAGRAMS..................................................................................................................... 7

SCHEMATIC DIAGRAMS..........................................................................................................10

TROUBLESHOOTING HINTS ...................................................................................................16

IC AND TRANSISTOR VOLTAGE CHART ............................................................................... 24

SEMICONDUCTOR LEAD IDENTIFICATION........................................................................... 31

ELECTRICAL PARTS LOCATION............................................................................................. 34

WIRING DIAGRAMS .................................................................................................................37

EXPLODED VIEW AND MECHANICAL PARTS LIST............................................................... 40

PARTS LIST............................................................................................................................... 44

ASSEMBLY PARTS LIST .......................................................................................................... 62

SPECIFICATIONS ..................................................................................................................... 63

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 manufacture 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 have 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 features are indentified by a in the schematic diagram and the parts list. Before replacing 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.

OPERATING CONTROLS

HANDSET CONTROLS AND FUNCTIONS LCD

Dot matrix display

VOL/RING ( ) button (up arrow button)

VOL/RING ( ) button

Liquid Crystal Display (LCD)

REDIAL ( ) button (Left arrow button)

TALK button

(down arrow button) FLASH ( ) button

(Right arrow button) SELECT button

CID (Caller ID) button

Caller's telephone number Caller's name

Number of calles

Date Time

(TONE) button

dialpad

MEM (Memory) button PAUSE button FUNC (Function) button

DELETE CH button Charging contacts

BASE UNIT CONTROLS AND FUNCTIONS

DC in 9V Jack TEL LINE Jack

900MHz

CALLER ID

FD-9839

OGM button ANSWER button

REPEAT button PIN button

IN USE LED CHARGE LED POWERR LED

Battery compartment

T-P (TONE-PULSE) switch Ringer ON/OFF switch

Speaker

Antenna LED Display

VOLUME button DELETE button MEMO/2WAY REC button

PLAY/STOP button PAGE button

SKIP button Rec Time Switch (ANN/4/1) CLOCK button Ring Time Switch (2/4/TS)

SPEAKER button Speaker LED

Microphone

Base Unit

Transmitter Section

ALIGNMENT PROCEDURE

Connections

AC Adapter (120V 60Hz)

BASE Unit

Test Point

(J1)

Spectrum Analyzer

FM Deviation Meter

Preset

a) Remove the solder on the pattern (refer to the illust. below). b) Set the “TONE / PULSE” switch to PULSE. c) Connect the AC adapter to the base unit while pressing the “PAGE” key, and keep pressing it continuously for

approximate 2 seconds.

d) Release the “PAGE” key when entering TEST mode 1 with CHARGE LED lighting.

Alignment Procedure

step

Adjustment

VR202

(TX P ower)

Remarks

Connect the Spectrum Analyzer to test point (J1). Adjust VR202 so that the power instructions of the Spectrum analyzer reaches

-6.0dBm. Then confirm the frequency is 926.295415 MHz.

Press the “PAGE” key twice and connect the FM Deviation Meter to test point J1. Confirm the de viation is 23 ~ 46 kHz.

Alignment Point Location on Base Main PCB and Base RF PCB

Base Main PCB

Base RF PCB

VR202

Test Point

Remove solder before alignment

Receiver Section

Connections

AC 120V

60Hz

9V Jack

Adapter

Test Point (J1)

DC IN

BASE Unit

Discriminator Test Point

DC Voltmeter

Preset

a) Remove the solder on the pattern (refer to the illust. below). b) Set the “T ONE/PULSE” switch to PULSE. c) Connect the AC adapter to the base unit while pressing the “PAGE” key, and keep pressing it continuously for

approximate 2 seconds.

d) Release the “PAGE” key when entering TEST mode 1 with CHARGE LED lighting.

Alignment Procedure

step1Preset to

Adjustment

Remarks

Press the “PAGE” key for 3 times to enter the TEST Mode 4. Connect the

SG: 1mV

No modulation

(Discriminator

Voltage)

RF Signal Generator to the test point (J1) on the Base MAIN PCB. Make sure that the frequency is 903.417756 MHz. Connect the DC Voltmeter to the Discriminator test point. Adjust L1 to indicate DC 0.90 V.

Alignment Point Location on Base Main PCB and Base RF PCB

Base Main PCB

Base RF PCB

VR202

Remove solder before alignment

Discriminator Test Point

Test Point

Handset Unit

Transmitter Section

Connection

Handset Unit

Test

Batt

Connector

DC Power Supply

3.8V

Point

(J601)

Preset

a) Remove the solder on the pattern (refer to the illust. below). b) Connect DC power supply to battery connector on the handset unit. c) Turn the DC power supply On while pressing “

∗∗

∗ ” and “ # “ keys, and keep pressing the keys continuously for

∗∗

approximate 2 seconds.

d) Release keys when entering TEST mode 1 with beep.

Alignment Procedure

step

Adjustment

VR502

Connect the Spectrum Analyzer to test point (J601). Adjust VR502 so that the power instructions of the Spectrum analyzer reaches

-4.0 dBm. Then comfirm the frequency is 903.617561 MHz.

Press the “3” key and connect the FM Deviation Meter to test point (J601). Confirm the deviation is 23 ~ 46 kHz.

Spectrum Analyzer

Remarks

FM Deviation Meter

Alignment Point Location on Handset Main PCB and Handset RF PCB

Handset PCB

RF PCB

VR502

Test Point (J601)

Remove solder

Receiver Section

Connections

RF SG

Test Point (J601)

HANDSET Unit

DC Power Supply

Battery

Connector

DC 3.8V

Discriminator Test Point

Preset

1) Remove the solder on the pattern (refer to the illust. below).

2) Connect DC power supply to battery connector on the handset unit.

3) Turn the DC power supply ON while pressing “

∗∗

∗ ” and “ # “ keys, and keep pressing the keys continuously for

∗∗

approximate 2 seconds.

4) Release keys when entering TEST mode 1 with beep.

Alignment Procedure

step1Preset to

SG: 1mV

No modulation

Adjustment

L603

(Discriminator

Voltage)

Press the “4” key to enter the TEST Mode 4. Connect the RF Signal Generator to the test point (J601) on the handset MAIN PCB. Make sure that the frequency is 926.495220 MHz. Connect the DC Voltmeter to the Discriminator test point. Adjust L603 to indicate DC 0.90 V.

DC Voltmeter

Remarks

Alignment Point Location on Handset Main PCB and Handset RF PCB

Handset PCB

Discriminator Test Point

RF PCB

L603

Test Point (J601)

Remove solder

Base Unit, Main

BLOCK DIAGRAMS

Base Unit, Key

Handset

Base Unit, Main

SCHEMATIC DIAGRAMS

Base Unit, Key

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 4 of IC5?

Is there pulse wave at pin 49 of IC8?

Check IC8 and its peripheral circuit.

BASE UNIT

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

Check IC5 and TEL network circuit.

Check R179.

If you want to reset the unit to the factory settings

You can cancel the OGM, PIN, and the clock settings by the following process.

1) Disconnect the AC adaptor and telephone line cord from the base. Keep the A C adaptor connected to the wall outlet. Make sure that the telephone line cord remains disconnected during this procedure.

2) While pressing the DELETE button, plug the AC power adaptor into the base. Keep pressing the DELETE button for more than 4 seconds . A beep sounds and “ P” blinks in the LED display.

To resume using the unit, connect the telephone line cord and place the handset on the base.

Note: If you turn on the unit again, “ P” may flash.

HANDSET

Deletion of the Caller ID memory

To delete the Caller ID memory in the EEPROM, proceed with the following process:

1) Connect the battery with pressing and # buttons, and keep pressing the buttons continuously for approximate 2 seconds.

2) Release buttons when entering TEST mode with beep.

3) Press CID button.

4) A confirmation beep will sound after about 8 seconds, then the data for caller ID is deleted. (Note: Do not disconnect the battery until you hear the confirmation beep, otherwise the data may not be completely deleted.)

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?

When the PAGE SW of the base is pressed, does pin63 of IC8 change from high to low?

See 3. The base and handset cannot be connected.

When the key of the handset is pressed, can the pulse output at pin 2 of IC606 be seen?

At the Q609 collector, can the pulse wave be seen?

Check RINGER Y601.

Check R147, R753, R758, R443, R754, C427 and Q403.

Check IC606.

Check R667 and Q609.

Replace defective part(s).

Check IC8 and its peripheral circuit.

Check IC402 and key circuit.

3. The base and handset cannot be connected.

Check whether the base is able to set in the test mode 1.

Check the TX POWER and the TX FREQUENCY on the base unit.

Press “PAGE” key twice, check whether deviation of the TX data is app . ±23 kHz~±46kHz Dev.

Check whether the handset is able to set in the test mode 1.

Check the TX POWER and the TX FREQUENCY on the handset unit.

NGACheck IC4 and its

peripheral circuit.

Check base RF unit.

Check whether there is a

pulse data waveform at C19.

Check base RF unit.

NG Check IC606 and its

peripheral circuit.

Check handset RF unit.

Check IC2, Q2 and the

peripheral circuit.

Press “3” key, check whether deviation of the TX data is app. ±23kHz ~ ±46kHz Dev.

Press “5” ke y, 926.49522 MHz (30kHz ±30kHz Dev.) 1mV output signal from RF jack is applied. Check whether the bell ring.

Place the handset on the base to charge about 10 seconds, then connect again.

NG Check whether there is a

pulse data waveform at C630.

Check handset RF unit.

NG Check whether there is

the 30kHz waveform at C605.

Check whether there is a 30kHz pulse wavef orm at pin 35 of IC602.

Check whether the voltage at pin 10 of IC601 is more than 1V.

Check whether there is

a pulse data waveform at pin 40 of IC602.

Check R656, C633, R654, C631 and C630.

Check handset RF unit

and the peripheral circuit of IC601, Q605, FT601, FT602.

Check R620, R621,

R623, R625, C605, C607, C608, D611, IC602 and their peripheral circuit.

Check IC601 and its

peripheral circuit.

Check IC602 and its

periperal circuit.

Check C606, IC606 and its peripheral circuit.

4. Cannot make a phone call (pulse).

Can the base and handset be connected?

While in TALK MODE, press dial key of the handset. Check whether square waveform from pin 46 of IC8 is fed.

Check R83, D11, Q11, RL1 and the peripheral circuit.

See 3. The base and handset cannot be connected.

Check IC8 and its peripheral circuit.

5. Cannot make a phone call (tone).

Can the base and handset be connected?

See 3. The base and handset be cannot be connected.

While in TALK MODE, press dial key of the handset. Can tone waveform from Pin 23 of IC2 is fed?

Can tone signal be heard from the handset speaker?

Check the base TEL-line circuit and RELAY control circuit.

Check IC2 and its peripheral circuit.

Check IC3, Q3, Q4 and the peripheral circuit.

6. Voice cannot be transmitted to other party (outgoing call).

Can the base and handset be connected?

The 1 kHz, 3.3mV sine waveform is applied to

MC601 sine waveform from collector of Q606 be fed?

Check whether there is the 1 kHz sine waveform at pin 12 of IC602.

Check whether there is the 1 kHz sine waveform at pin 22 of IC2.

Check whether there is the 1 kHz sine waveform at the Q4 collector.

side, can the 1 kHz

See 3. The base and handset cannot be connected.

Check Q606 and its peripheral circuit.

Check IC602 and the peripheral circuit.

Check IC2 and the peripheral circuit.

Check IC2, Q4 and the pripheral circuit.

Check whether the 1 kHz sine waveform from TEL-line output is fed.

Check MC601 of handset.

Check T1, RL1 and their pripheral circuits.

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