8
Receiver Section
Connections
Preset
a) Connect the handset RF unit to the handset main unit.
b) Connect DC power supply to battery connector on the handset unit.
c) Turn the DC power supply ON while pressing “
*
” and “#” keys, and keep pressing the key continuously for
approximate 2 seconds.
d) Release keys when entering TEST mode 1 with TALK LED lighting and beep.
Alignment Procedure
step
Preset to
Adjustment
Remarks
1
SG: 1mV
No modulation
L402
(Discriminator
Voltage)
Press the “4” key to enter the TEST Mode 4. Connect the RF Signal
Generator to the RF test point on the handset MAIN PCB. Make sure
that the frequency is 926.997467 MHz.
Connect the DC Voltmeter to the AF test point. Adjust L402 to indicate
DC 1.00 V.
2
SG: 1mV
1kHz ±8kHz
Deviation
RT402
(RX AF
Voltage)
Connect the RF Signal Generator to the RF test point on the handset
MAIN PCB. Make sure that the frequency is 926.997467 MHz.
Connect the AC Voltmeter across a 150-ohm dummy to the MIC
Connector. Adjust RT402 for a 128 mV reading on the AC Voltmeter.
3
SG: -7dB
µ
V
1kHz ±8kHz
Deviation
RT401
(SQ Point)
Press the “5” key to enter the TEST Mode 5. Make sure that the frequency
of RF SG output is 926.997467 MHz. Adjust RT401 to turn to the point
where the bell rings.
Alignment Point Location on Handset Main PCB and Handset RF PCB
J401
RT401
RT402
L402
RF PCB
AF
Terminal
HANDSET Unit
RF SG
SP
Connector
RF
Test Point
DC Voltmeter
Dummy Load
(150-ohm)
AC Voltmeter
-
+
-
+
J401
Batter
Terminal
DC 3.8V
DC Power Supply
RF TEST POINT
Handset PCB
AF TEST POINT
Summary of Contents for FT-8509
Page 2: ... 121 5 30 36 6 59 0 18 25 66 7 3 21 70 83 38 6 1 3 1 XJ1 4 ...
Page 11: ...9 BLOCK DIAGRAMS Base Unit ...
Page 12: ...10 Handset Unit ...
Page 13: ...6 0 7 5 06 DVH 8QLW 0DLQ 45 44 ...
Page 15: ... DQGVHW 0DLQ 48 47 ...
Page 30: ...30 ELECTRICAL PARTS LOCATION Base Unit Main PCB ...
Page 31: ...31 Base Unit Key PCB ...
Page 32: ...32 Handset Main PCB ...
Page 33: ...33 WIRING DIAGRAMS Base Unit ...
Page 34: ...34 Handset ...
Page 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 ...
Page 53: ......