
— 4 —
Base Main PCB
RT301
RT3
CT1
J1
TEL LINE Jack
J2
DC IN 9V Jack
RF Test Point
Base RF PCB
Alignment Point Location on Base Main PCB and Base RF PCB
ALIGNMENT PROCEDURE
Base Unit
Transmitter Section
Connections
Preset
Press and hold the “ANSWER” key about 5.0 seconds while turning the 7. SEG LED shows “8” .
Power
Meter
RF
Test Point
BASE Unit
J2
DC IN
9V Jack
1kHz -15dBm
AF GEN.
AC 120V
60Hz
Frequency
Counter
Deviation
Meter
RF
Test Point
J1
TEL Line
Jack
AC
Adapter
Alignment Procedure
step
1
2
3
Adjustment
RT301
(TX Power)
CT1
(TX Frequency)
RT3
(TX Modulation)
Remarks
Connect the Power Meter to the RF test point on the Base MAIN PCB.
Adjust RT301 for a -6.0dBm 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 “SKIP / FF” key to enter the TEST MODE “9”. Connect the AF
Generator to the TEL Line Jack on the Base Main PCB. Make sure that
the output is 1 kHz -15dBm from the AF Generator.
Connect the Deviation Meter to the RF test point on the Base MAIN PCB.
Adjust RT3 to indicate ±8 kHz Dev.
Содержание FT-8981
Страница 1: ...SERVICE MANUAL PUBLISHED IN JAPAN May 2001 FILE NO 2B0 200104 FT 8981 CORDLESS TELEPHONE ...
Страница 9: ... 8 BLOCK DIAGRAMS Base Unit ...
Страница 10: ... 9 Handset ...
Страница 11: ...SCHEMATIC DIAGRAMS Base Unit 10 11 FT8981 Sche p65 01 05 25 13 21 Page 8 Adobe PageMaker 6 5J Win ...
Страница 12: ...Handset 12 13 FT8981 Sche p65 01 05 25 13 21 Page 9 Adobe PageMaker 6 5J Win ...
Страница 27: ... 28 ELECTRICAL PARTS LOCATION Base Unit Main PCB ...
Страница 28: ... 29 Handset Main PCB ...
Страница 29: ... 30 WIRING DIAGRAMS Base Unit ...
Страница 30: ... 31 Handset ...