Toshiba FT-7007LBR, Service Manual

Page: 4 / 43

3
ALIGNMENT PROCEDURE
Base Unit / Transmitter
Test Equipment Required and Connections
• Oscilloscope • Dummy Load, 50-ohm
• Frequency Counter • AC Power Supply : 120V, 60Hz (With AC Adapter)
Preset
a) Set T/P SW to Pulse Mode.
b) Turn on AC power while the Page key is being depressed.
c) Release the Page key 2 seconds later, then the TX Mode is entered (CH21).
Alignment Procedure
Alignment Point Location on Main PCB
Step Adjustment Remarks
1 L8
Connect the oscilloscope across a 50-ohm load to RF test point.
Set the digital voltmeter at the test point of TX VCO.
Adjust L8 to indicate DC 2.8V ±0.05V.
2
!
Connect the frequency counter across a 50-ohm dummy load to RF test point. Make
sure that the frequency is 46.770 MHz ±1500Hz.
AC Adapter
(120V 60Hz)
BASE Unit
Dummy Load
(50-ohm)
RF Test
Point
Frequency Counter
Digital Voltmeter
TX VCO
Test Point
Oscilloscope
T/P SW
L8
S1
P
T
RF Test Point TX VCO Test Point