Alignment Procedure - Toshiba FD-9839 Service Manual

Base Unit
Transmitter Section
Connections
AC Adapter
(120V 60Hz)
Preset
a) Remove the solder on the pattern (refer to the illust. below).
b) Set the "TONE / PULSE" switch to PULSE.
c) Connect the AC adapter to the base unit while pressing the "PAGE" key, and keep pressing it continuously for
approximate 2 seconds.
d) Release the "PAGE" key when entering TEST mode 1 with CHARGE LED lighting.

Alignment Procedure

step Adjustment
VR202
1
(TX Power)
2
Alignment Point Location on Base Main PCB and Base RF PCB
Base Main PCB
ALIGNMENT PROCEDURE
BASE Unit
Test Point
(J1)
Connect the Spectrum Analyzer to test point (J1).
Adjust VR202 so that the power instructions of the Spectrum analyzer reaches
-6.0dBm.
Then confirm the frequency is 926.295415 MHz.
Press the "PAGE" key twice and connect the FM Deviation Meter to test
point J1. Confirm the deviation is 23 ~ 46 kHz.
Base RF PCB
VR202
3
Spectrum Analyzer
Remarks
T
S1
P
J1
Remove solder
before alignment
Test Point
FM Deviation Meter