Alignment Procedure - Toshiba FT-8901 Service Manual

Hide thumbs Also See for FT-8901:
Table of Contents

Advertisement

Base Unit
Transmitter Section
Connections
Frequency
Deviation
Preset
Press and hold the "ANSWER" key about 5.0 seconds while turning the 7. SEG LED shows "8" .

Alignment Procedure

step
Adjustment
RT301
1
(TX Power)
CT1
2
(TX Frequency)
RT3
3
(TX Modulation)
Alignment Point Location on Base Main PCB and Base RF PCB
ALIGNMENT PROCEDURE
RF
Test Point
Power
Meter
RF
Test Point
Counter
Meter
Connect the Power Meter to the RF test point on the Base MAIN PCB.
Adjust RT301 for a -6.0dBm reading on the Power Meter.
Connect the Frequency Counter to the RF test point on the Base MAIN
PCB. Adjust CT1 to make sure that the frequency is 926.897468 MHz.
Press the "SKIP / FF" key to enter the TEST MODE "9". Connect the AF
Generator to the TEL Line Jack on the Base Main PCB. Make sure that
the output is 1 kHz -15dBm from the AF Generator.
Connect the Deviation Meter to the RF test point on the Base MAIN PCB.
Adjust RT3 to indicate ±8 kHz Dev.
Base Main PCB
BASE Unit
J2
J1
DC IN
TEL Line
1kHz -15dBm
9V Jack
Jack
Remarks
RT3
Base RF PCB
RT301
CT1
RF Test Point
— 4 —
AF GEN.
AC
AC 120V
Adapter
60Hz
J1
TEL LINE Jack
J2
DC IN 9V Jack

Advertisement

Table of Contents
loading

Table of Contents