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SERVICE MANUAL
PUBLISHED IN JAPAN, Oct., 2001
FILE NO. 2BO-200111
FT-8001A
FT-8001AW
CORDLESS TELEPHONE


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-- 1 --
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 ........................................................................................................................................ 32
ASSEMBLY PARTS LIST ................................................................................................................... 45
SPECIFICATIONS .............................................................................................................................. 46
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 manufacturer
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 identified 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.


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-- 2 --
OPERATING CONTROLS
BASE UNIT CONTROLS AND FUNCTIONS
TALK Button
(TONE) Button
MEM (Memory) Button
MUTE Button
Charging Contacts
VOL/RING Button
CH (Channel) Button
Antenna
FLASH Button
RDL/P (Redial/Pause) Button
Dialpad
Rechargeable
Battery Pack (back)
TALK/BATT LOW LED
TALK
ABC
2
JKL
5
TUV
8
OPER
TONE
MEM
MUTE
CH
VOL/RING
RLD/P
TALK
BATT LOW
FLASH
0
DEF
3
MNO
6
WX
YZ
PQ
RS
9
#
GHI
4
7
1
COMPANDOR NOISE REDUCTION
DC IN 9V Jack
LINE Modular Jack
Antenna
IN USE/CHARGE LED
PAGE Button
Charging Contacts
Hook
IN USE
PAGE
CHARGE
CORDLESS
TELEPHONE
FT-8001
COMPANDOR NOISE REDUCTION
HANDSET CONTROLS AND FUNCTIONS


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-- 3 --
J1
J2
J1
TEL LINE Jack
J2
DC IN 9V Jack
RF Test Point
CT1
RT3
RT2
RT1
Base Main PCB
Alignment Point Location on Base Main PCB
Power
Meter
RF
Test Point
BASE Unit
J2
DC IN
9V Jack
1kHz 219mV
(-11.0dBm)
AF GEN.
AC 120V
60Hz
Frequency
Counter
Deviation
Meter
RF
Test Point
J1
TEL Line
Jack
AC
Adapter
ALIGNMENT PROCEDURE
Base Unit
Transmitter Section
Connections
Preset
a) Connect the AC adapter to the base unit while pressing the "PAGE" key, and keep pressing it continuously for
approximate 2 seconds.
b) Release the "PAGE" key when entering TEST mode 1 with IN USE LED lighting.
To change the TEST mode : Press the "PAGE" key less than 500 mS.
Alignment Procedure
Step
1
2
3
Adjustment
RT1
(TX Power)
CT1
(TX Frequency)
RT2
(TX Modulation)
Remarks
Connect the Power Meter to the RF test point on the Base MAIN PCB.
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 key to enter the TEST Mode 2. Connect the AF Generator
to the TEL Line Jack on the Base Main PCB. Make sure that the output is 1
kHz 219mV (-11dBm) from the AF Generator.
Connect the Deviation Meter to the RF test point on the Base MAIN PCB.
Adjust RT2 to indicate
±8 kHz Dev.
Adjust RT1 for a -6.0dBm reading on the Power Meter.


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-- 4 --
Alignment Point Location on Base Main PCB
AC Voltmeter
BASE Unit
AF
Terminal
Dummy Load
(600-ohms)
RF SG
AC 120V
60Hz
J2
DC IN 9V Jack
+
RF
Test Point
J1
TEL Line
Jack
AC
Adapter
DC Voltmeter
-
+
-
Receiver Section
Connections
Alignment Procedure
Step
1
2
3
Preset to
SG: 1mV
No modulation
SG: 1mV
1 kHz
±8kHz
Deviation
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 Terminal of RT4. Adjust L15 to
indicate DC 2.10V.
Connect the AC Voltmeter across a 600-ohms dummy to the Telephone
Line Jack. Adjust RT4 for a 219mV (
-11.0dBm) 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 RT3 to turn to the
point where the CHG LED just turns on.
Adjustment
L15
(Discriminator
Voltage)
RT4
(RX AF
Voltage)
SG:
-6.0 dBµV
No modulation
RT3
(SQ Point)
(
-47dBm)
(
-47dBm)
(
-113dBm)
Preset
a) Connect the AC adapter to the base unit while pressing the "PAGE" key, and keep pressing it continuously for
approximate 2 seconds.
b) Release the "PAGE" key when entering TEST mode 1 with IN USE LED lighting.
To change the TEST mode : Press the "PAGE" key less than 500 mS.
J1
J2
J1
TEL LINE Jack
J2
DC IN 9V Jack
RF Test Point
Base Main PCB
L15
RT3
RT4