7
Handset Unit
Transmitter Section
Connection
Alignment Point Location on Handset Main PCB and Handset RF PCB
Preset
Place the Handset in VCO/TX FREQ. ADJ mode in accordance with the procedure on page 4.
Alignment Procedure
RT501
RF Test Point
step
1
2
3
Adjustment
RT501
(TX Power)
CT401
(TX Frequency)
RT403
(TX Modulation)
Remarks
Connect the RF power Meter to the RF test point on the handset MAIN PCB.
Adjust RT501 for a -7.5dBm reading on the Power Meter.
Connect the Frequency Counter to the RF test point on the handset MAIN
PCB. Adjust CT401 to make sure that the frequency is 903.052467 MHz.
Press the “2” key to enter the TEST Mode 2. Connect the AF Generator to
the MIC Connector. Make sure that the output is 1kHz 9mV from the AF
Generator.
Connect the Deviation Meter to the RF test point on the handset MAIN PCB.
Adjust RT403 to indicate ±8 kHz Dev.
CT401
RT403
J401
RF PCB
Handset PCB
Power
Meter
RF
Test Point
HANDSET Unit
J401
Battery
Connector
1kHz 9mV
AF GEN.
DC 3.8V
Frequency
Counter
Deviation
Mater
RF
Test Point
MIC+Pin
DC Power Supply
MC401
Содержание FT-8939
Страница 2: ...CORDLESS TELEPHONE SERVICE MANUAL FILE NO 2B0 9904 FT 8939 PUBLISHED IN JAPAN Sep 1999 ...
Страница 11: ...9 BLOCK DIAGRAMS Base Unit Main ...
Страница 12: ...10 Base Unit DSP ...
Страница 13: ...11 Handset ...
Страница 14: ...12 13 SCHEMATIC DIAGRAMS Base Unit Main ...
Страница 15: ...14 15 Base Unit Key ...
Страница 16: ...16 17 Handset ...
Страница 33: ...34 ELECTRICAL PARTS LOCATION Base Unit Main PCB ...
Страница 34: ...35 Base Unit Key PCB ...
Страница 35: ...36 Handset Main PCB ...
Страница 36: ...37 38 WIRING DIAGRAMS Base Unit ...
Страница 37: ...39 Handset ...
Страница 40: ...42 Handset 7 8 4 1 16 17 17 5 10 15 11 12 2 9 6 13 14 3 17 MAIN PCB ASSY RF MODULE HANDSET ...
Страница 62: ......