— 7 —
Handset Unit
Transmitter Section
Connection
Preset
Place the Handset in VCO/TX FREQ. ADJ mode in accordance with the procedure on page 4.
Alignment Procedure
Step
Adjustment
Remarks
1
VR502
(TX Power)
Connect the RF power Meter to the RF test point on the handset RF PCB.
Adjust VR502 for a
−
7 dBm reading on the Power Meter.
2
CT501
(TX Frequency)
Connect the Frequency Counter to the RF test point on the handset RF
PCB. Adjust CT 501 to make sure that the frequency is 903.085147 MHz.
3
VR601
(TX Modulation)
Press the “2” key to enter the TEST Mode 2. Connect the AF Generator to
the MIC Connector. Make sure that the output is 1 kHz 11.0 mV from the AF
Generator.
Connect the Deviation Meter to the RF test point on the handset RF PCB.
Adjust VR601 to indicate
±
8kHz Dev.
Alignment Point Location on Handset Main PCB and Handset RF PCB
Power
Meter
Frequency
Counter
Deviation
Meter
RF
Test Point
RF
Test Point
HANDSET RF PCB
RF
Test Point
MIC + Pin
1kHz 11.0mV
Battery
Terminals
HANDSET MAIN PCB
DC Power Supply
DC 3.8V
AF GEN.
RF TEST POINT
CT501
J501
VR502
VR601
Handset Main PCB
RF PCB
MIC + Pin
MC601
Battery Terminals
−
+
Содержание FT-8508
Страница 1: ...SERVICE MANUAL PUBLISHED IN JAPAN Jun 1998 FILE NO 2B0 9804 FT 8508 CORDLESS TELEPHONE ...
Страница 3: ... 2 OPERATING CONTROLS BASE UNIT CONTROLS HANDSET CONTROLS RS YZ 1 2 ...
Страница 10: ...Handset Main 9 BLOCK DIAGRAMS ...
Страница 11: ...Handset RF 10 ...
Страница 12: ...Base RF 11 ...
Страница 13: ...Base Main 12 13 ...
Страница 14: ...SCHEMATIC DIAGRAMS Base Main 14 15 ...
Страница 15: ...Base RF 16 17 ...
Страница 16: ...Base Key 18 19 ...
Страница 17: ...Handset Main 20 21 ...
Страница 18: ...Handset RF 22 23 ...
Страница 36: ...Base Main 41 ELECTRICAL PARTS LOCATION ...
Страница 37: ...Base RF 42 ...
Страница 38: ...Base Key 43 ...
Страница 39: ...Handset Main 44 ...
Страница 40: ...Handset RF 45 ...
Страница 41: ...Base 46 WIRING DIAGRAMS ...
Страница 42: ...Handset 47 W501 W 072147 J502 JK 736 9P J601 IC603 PORTABLE RF B501 PE1294DA TOP VIEW SOLDERING ...
Страница 71: ...MECHANICAL PARTS LIST ...