6
Receiver Section
Connections
Preset
Place the Base unit in RX SENS mode (step 4) in accordance with the procedure on page 3.
Alignment Procedure
step
Preset to
Adjustment
Remarks
1
SG: 1mV
No modulation
L3
(Discriminator
Voltage)
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 p oint (JV21). Adjust L3 to
indicate DC 1.9V.
2
SG: 1mV
1kHz ±8kHz
deviation
RT2
(RX AF
Voltage)
Connect the AC Voltmeter across a 600-ohm dummy to the Telephone
Line Jack. Adjust RT2 for a 218 mV reading on the AC voltmeter.
3
SG: -7dB
µ
V
No modulation
RT1
(SQ Point)
Press the “5” 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.
Alignment Point Location on Base Main PCB and Base RF PCB
AF
Terminal
BASE Unit
J1
DC IN 9V Jack
AC 120V
60Hz
AC
Adapter
RF SG
J3
TEL Line
Jack
RF
Test Point
DC Voltmeter
Dummy Load
(600-ohm)
AC Voltmeter
-
+
-
+
J3
TEL LINE Jack
J1
DC IN 9V Jack
BASE RF PCB
RT1
L3
AF TEST POINT
RT301
Base Main PCB
RF TEST POINT
RT2
JV21
Содержание FT-8509
Страница 2: ... 121 5 30 36 6 59 0 18 25 66 7 3 21 70 83 38 6 1 3 1 XJ1 4 ...
Страница 11: ...9 BLOCK DIAGRAMS Base Unit ...
Страница 12: ...10 Handset Unit ...
Страница 13: ...6 0 7 5 06 DVH 8QLW 0DLQ 45 44 ...
Страница 14: ...13 Base Unit ke NOTES 1 RESISTANCE VALUES ARE SHOWN IN OHMS UNLESS OTHERWISE NOTED K KILO OHM M MEG OHM ...
Страница 15: ... DQGVHW 0DLQ 48 47 ...
Страница 30: ...30 ELECTRICAL PARTS LOCATION Base Unit Main PCB ...
Страница 31: ...31 Base Unit Key PCB ...
Страница 32: ...32 Handset Main PCB ...
Страница 33: ...33 WIRING DIAGRAMS Base Unit ...
Страница 34: ...34 Handset ...
Страница 35: ...35 EXPLODED VIEWS AND MECHANICAL PARTS LIST Base Unit SPEAKER KEY PCB RF MODULE BASE MAIN PCB ANTENNA ...
Страница 37: ...37 7 8 4 1 16 17 17 5 10 15 11 12 2 9 6 13 14 3 17 Handset RF MODULE HANDSET MAIN PCB ASSY ...
Страница 53: ......