— 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
−
6 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 903.079230 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.
CT501
VR502
VR601
J501
Handset Main PCB
RF PCB
MIC + Pin
MC601
RF TEST POINT
Battery Terminals
−
+
Содержание FT-8258
Страница 1: ...SERVICE MANUAL PUBLISHED IN JAPAN Jun 1998 FILE NO 2B0 9801 FT 8258 CORDLESS TELEPHONE ...
Страница 10: ...BLOCK DIAGRAMS Handset Main 9 ...
Страница 11: ...Handset RF 10 ...
Страница 12: ...Base RF 11 ...
Страница 13: ...Base Main 12 13 ...
Страница 14: ... 14 15 SCHEMATIC DIAGRAMS ...
Страница 15: ... 16 17 Base RF ...
Страница 16: ...Base Key 18 19 ...
Страница 17: ... 20 21 Handset Main ...
Страница 18: ... 22 23 Handset RF ...
Страница 37: ...ELECTRICAL PARTS LOCATIONS Base Main 42 ...
Страница 38: ...Base RF 43 ...
Страница 39: ...Base Key 44 ...
Страница 40: ...Handset Main 45 ...
Страница 41: ...Handset RF 46 ...
Страница 42: ...WIRING DIAGRAMS Base 47 ...
Страница 43: ...Handset 48 ...
Страница 75: ...MECHANICAL PARTS LIST ...