6
Receiver Section
Connections
Alignment Point Location on Base Main PCB and Base RF PCB
Preset
Place the Base Unit in RX SENS mode (step 4) in accordance with the precedure on page 3.
Alignment Procedure
step
1
2
3
Preset to
SG: 1mV
No modulation
SG: 1mV
1 kHz ±8kHz
deviation
SG: -6.0 dB
µµµµµ
V
No modulation
Remarks
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 L4 to indicate DC
1.00 V.
Connect the AC Voltmeter across a 600-ohm dummy to the Telephone Line
Jack. Adjust RT2 for a 245 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 bell rings.
Adjustment
L3
(Discriminator
Voltage)
RT2
(RX AF
Voltage)
RT1
(SQ Point)
AC Voltmeter
BASE Unit
AF
Terminal
Dummy Load
(600-ohm)
RF SG
AC 120V
60Hz
J4
DC IN 9V Jack
+
RF
Test Point
J1
TEL Line
Jack
AC
Adapter
DC Voltmeter
-
+
-
S1
T/P Switch
RT1
P
T
RF Test Point
RT2
J4
DC IN 9V Jack
J1
TEL LINE Jack
L3
Base Main PCB
AF Test Point
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: ......