TOSHIBA ft8009 Service Manual
FILE NO. 2B0-9901
SERVICE MANUAL
CORDLESS TELEPHONE
FT-8009
48
PUBLISHED IN JAPAN, Aug., 1999
CONTENTS
SAFETY PRECAUTIONS ............................................................................................................ 1
OPERATING CONTROLS........................................................................................................... 2
ALIGNMENT PROCEDURE ........................................................................................................ 3
BLOCK DIAGRAMS..................................................................................................................... 7
SCHEMATIC DIAGRAMS............................................................................................................9
TROUBLESHOOTING HINTS ................................................................................................... 13
IC AND TRANSISTOR VOLTAGE CHART ............................................................................... 20
SEMICONDUCTOR LEAD IDENTIFICATION........................................................................... 24
ELECTRICAL PARTS LOCATION............................................................................................. 26
WIRING DIAGRAMS .................................................................................................................28
EXPLODED VIEW AND MECHANICAL PARTS LIST............................................................... 30
PARTS LIST............................................................................................................................... 34
ASSEMBLY PARTS LIST .......................................................................................................... 42
SPECIFICATIONS ..................................................................................................................... 43
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.
1
OPERATING CONTROLS
HANDSET CONTROLS AND FUNCTIONS
Antenna
TALK/BATT.LOW LED
TALK Button
TONE Button
MEM Button
PAUSE Buttons
One-touch dialing Button
(MEM1 - MEM3)
Rechargeable Battery Pack
(back)
BASE UNIT CONTROLS AND FUNCTIONS
DC in 9V Jack
LINE Modular Jack
REDIAL Button
FLASH Button
Dialpad
VOL/RING Button
CH Button
MUTE Button
Charging Contacts
T-P(TONE-PULSE) Switch
Charging Contacts
Antenna
IN USE/CHARGE LED
PAGE Button
2
ALIGNMENT PROCEDURE
Base Unit
Transmitter Section
Connections
Preset
a) Connect the base RF unit to the base main unit.
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 sectonds.
d) Release the “PAGE” key when entering TEST mode 1 with IN USE LED lighting.
Power
Meter
Frequency
Counter
Deviation
Mater
RF
Test Point
RF
Test Point
BASE Unit
J2
DC IN
9V Jack
TEL Line
Jack
J1
1kHz 77.5mV
AF GEN.
AC
Adapter
AC 120V
60Hz
Alignment Procedure
step
1
2
Adjustment
RT301
(TX P ower)
CT1
(TX Frequency)
Connect the Po w er Meter to the RF test point on the Base MAIN PCB.
Adjust RT301 for a -5.0dBm reading on the Power Meter.
Connect the Frequency Counter to the RF test point on the Base MAIN
PCB. Adjust CT1 to make sure that the frequency is 926.897468 MHz.
Press the “PAGE” k e y to enter the TEST Mode 2. Connect the AF Generator
3
RT3
(TX Modulation)
to the TEL Line J a ck on the Base Main PCB. Make sure that the output is 1
kHz 77.5 mV from the AF Generator .
Connect the Deviation Meter to the RF test point on the Base MAIN PCB.
Adjust RT3 to indicate ±8 kHz De v.
Alignment Point Location on Base Main PCB and Base RF PCB
Base Main PCB
Base RF PCB
RT3
CT1
RT301
Remarks
J1
TEL LINE Jack
J2
DC IN 9V Jack
T
S2
T/P Switch
P
RF Test Point
3
Receiver Section
Connections
RF SG
+
RF
Test Point
TEL Line
Jack
J1
Dummy Load
(600-ohm)
+
AC V oltmeterBASE Unit
AC 120V
60Hz
AC
Adapter
DC IN 9V Jack
J2
AF
Terminal
DC V oltmeter
Preset
a) Connect the base RF unit to the base main unit.
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 IN USE LED lighting.
Alignment Procedure
step
Preset to
1
SG: 1mV
No modulation
SG: 1mV
1 kHz ±8kHz
2
deviation
SG: -6.0 dB
1kHz ±8kHz
3
Deviation
Adjustment
(Discriminator
Voltage)
(RX AF
Voltage)
µµ
µV
µµ
(SQ Point)
L3
RT2
RT1
Remarks
Press the “PAGE” key for 3 times to enter the TEST Mode 4. Connect the
RF Signal Generator to the RF test point on the Base MAIN PCB. Make
sure that the frequency is 902.952467 MHz.
Connect the DC Voltmeter to the AF test point. Adjust L3 to indicate DC
1.00 V.
Connect the AC Voltmeter across a 600-ohm dummy to the Telephone Line
Jack. Adjust RT2 for a 220 mV reading on the AC voltmeter.
Press the “PAGE” key to enter the TEST Mode 5. Make sure that the
frequency of RF SG output is 902.952467 MHz. Adjust RT1 to turn to the
point where the CHG LED just turns on.
Alignment Point Location on Base Main PCB and Base RF PCB
Base Main PCB
RT2
RT1
L3
AF Test Point
4
J1
TEL LINE Jack
J2
DC IN 9V Jack
T
S2
T/P Switch
P
RF Test Point
Handset Unit
Transmitter Section
Connection
Power
Meter
Frequency
Counter
Deviation
Mater
Preset
a) Connect the handseet RF unit to the handset main unit.
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 TALK LED lighting and beep.
RF
Test Point
RF
Test Point
HANDSET Unit
J603
Battery
Connector
MIC+Pin
DC 3.8V
AF GEN.
1kHz 9mV
DC Power Supply
Alignment Procedure
step
1
2
3
Adjustment
RT501
(TX P ower)
CT401
(TX Frequency)
RT403
(TX Modulation)
Remarks
Connect the RF power Meter to the RF test point on the handset MAIN PCB.
Adjust RT501 for a -7.5dBm reading on the Power Meter.
Connect the Frequency Counter to the RF test point on the handset MAIN
PCB. Adjust CT401 to make sure that the frequency is 903.052467 MHz.
Press the “2” key to enter the TEST Mode 2. Connect the AF Generator to
the MIC Connector. Make sure that the output is 1kHz 9mV from the AF
Generator.
Connect the Deviation Meter to the RF test point on the handset MAIN PCB.
Adjust RT403 to indicate ±8 kHz De v.
Alignment Point Location on Handset Main PCB and Handset RF PCB
Handset PCB
J401
RT403
RF PCB
RT501
RF Test Point
MC601
CT401
5
Receiver Section
Connections
RF SG
+
RF
Test Point
J602
SP
Connector
Dummy Load
(150-ohm)
+
AC V oltmeterHANDSET Unit
DC Power Supply
Battery
Connector
DC 3.8V
J603
AF
Terminal
DC V oltmeter
Preset
a) Connect the handset RF unit to the handset main unit.
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 TALK LED lighting and beep.
Alignment Procedure
step
Preset to
1
SG: 1mV
No modulation
SG: 1mV
1 kHz ±8kHz
2
deviation
SG: -6.0 dB
1kHz ±8kHz
3
Deviation
Adjustment
L402
(Discriminator
Voltage)
RT402
(RX AF
Voltage)
µµ
µV
µµ
RT401
(SQ Point)
Remarks
Press the “4” key to enter the TEST Mode 4. Connect the RF Singal
Generator to the RF test point on the handset MAIN PCB. Make sure that
the frequency is 926.997467 MHz.
Connect the DC Voltmeter to the AF test point. Adjust L402 to indicate
DC 1.00 V.
Connect the RF Signal Generator to the RF test point on the handset MAIN
PCB. Make sure that the frequency is 926.997467 MHz.
Connect the AC Voltmeter across a 150-ohm dummy to the SP Connector.
Adjust RT402 for a 102 mV reading on the AC Voltmeter.
Press the “5” k e y to enter the TEST Mode 5. Make sure that the frequency
of RF SG output is 926.997467 MHz. Adjust RT401 to turn to the point
where the indication is just vibrated.
Alignment Point Location on Handset Main PCB and Handset RF PCB
Handset PCB
J401
RT402
RT401
6
L402
RF PCB
AF Test Point
RF Test Point
Base Unit
BLOCK DIAGRAMS
7
Handset
8
Base Unit
SCHEMATIC DIAGRAMS
9
10
Handset
11
12
TROUBLESHOOTING HINTS
1. The bell does not ring.
When the PAGE SW of the
base is pressed, does the
ringer on the handset ring?
OK
When the TEL SG is joined
with the base to make bell
signal, is there pulse wave at
pin 4 of IC4?
OK
Is there pulse wave at
pin 21 of IC5?
OK
Check IC5 and its
peripheral circuit.
NG
NG
NG
See 2. The bell does not ring
& page does not ring.
Check IC4 and TEL network
circuit.
Check R58, C45 and R59.
13
2. The bell does not ring & page does not ring.
Can the base and handset be
connected?
OK
Press handset DIAL key
while in TALK MODE.
Can key touch sound be
heard from the ringer?
OK
When the PAGE SW of the
base is pressed, does pin20
of IC5 change from high to
low?
NG
NG
NG
See 3. The base and handset
cannot be connected.
When the key of the handset is
pressed, can the pulse output
at pin 38 of IC404 be seen?
OK
At the Q408 collector, can the
pulse wave be seen?
OK
Check RINGER Y401.
Check R55, R77 and S1.
NG
NG
Check IC404.
Check R454, R457 and D402.
OK
Check IC5 and its peripheral
circuit.
14
3. The base and handset cannot be connected.
Check whether the base
is able to set in the test
mode 1.
OK
Check the TX POWER
and the TX FREQUENCY
on the base unit.
OK
Set the base in the test
mode 3, check whether
deviation of the TX data
is app. 8 kHz Dev.
OK
Set the base in the test
mode 8, 902.952467
MHz (250 Hz ±8 kHz
Dev.) 1mV output signal
from RF jack is applied.
Can the status LED be
lighted?
OK
NGACheck IC5 and its
peripheral circuit.
NG
Check base RF unit.
Check whether there is a
NG
250 Hz data wav eform at
“MOD” of RF unit.
OK
Check base RF unit.
NG Check whether there is a
250 Hz data wav eform at
pin 9 of IC3.
OK
Check whether there is a
250 Hz data wav eform at
the Q2 collector.
OK
Check RT3, R40, R68,
NG
R69, R53, R70 and C79.
Check IC3, Q1 and their
NG
peripheral circuit.
Check RT2, Q2 and their
NG
peripheral circuit.
OK
NG
Check base RF unit.
Check whether the
handset is able to set in
the test mode 1.
OK
Check the TX POWER
and the TX FREQUENCY
on the handset unit.
OK
Check whether there is a
250 Hz data wav eform at
pin 38 of IC5.
OK
Check IC5 and its
peripheral circuit.
NG Check IC404 and its
peripheral circuit.
NG
Check handset RF unit.
15
Check R42, R46, IC1 and
NG
their peripheral circuit.
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