5
Base Unit
Transmitter Section
Connections
Preset
Place the Base Unit in VCO/TX FREQ.ADJ mode in accordance with the procedure on page 3.
Alignment Procedure
Alignment Point Location on Base Main PCB and Base RF PCB
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 -6.5dBm 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” 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 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 Dev.
Power
Meter
RF
Test Point
BASE Unit
J4
DC IN
9V Jack
1kHz 77.5mV
AF GEN.
AC 120V
60Hz
Frequency
Counter
Deviation
Mater
RF
Test Point
J1
TEL Line
Jack
AC
Adapter
S1
T/P Switch
P
T
J4
DC IN 9V Jack
J1
TEL LINE Jack
Base Main PCB
RF Test Point
RT3
RT301
CT1
Base RF PCB
Summary of Contents for FT-8989
Page 2: ...CORDLESS TELEPHONE SERVICE MANUAL FILE NO 2B0 9905 FT 8989 PUBLISHED IN JAPAN Sep 1999 ...
Page 11: ...9 BLOCK DIAGRAMS Base Unit Main ...
Page 12: ...10 Base Unit DSP ...
Page 13: ...11 Handset ...
Page 14: ...12 13 SCHEMATIC DIAGRAMS Base Unit Main ...
Page 15: ...14 15 Base Unit Key ...
Page 16: ...16 17 Handset ...
Page 34: ...35 ELECTRICAL PARTS LOCATION Base Unit Main PCB ...
Page 35: ...36 Base Unit Key PCB ...
Page 36: ...37 Handset Main PCB ...
Page 37: ...38 39 WIRING DIAGRAMS Base Unit ...
Page 38: ...40 Handset ...
Page 66: ......