Toshiba FD-9839 Service Manual page 7

Handset Unit
Transmitter Section
Connection
DC Power Supply
3.8V
Preset
a) Remove the solder on the pattern (refer to the illust. below).
b) Connect DC power supply to battery connector on the handset unit.
c) Turn the DC power supply On while pressing " ∗ ∗ ∗ ∗ ∗ " and " # " keys, and keep pressing the keys continuously for
approximate 2 seconds.
d) Release keys when entering TEST mode 1 with beep.
Alignment Procedure
step Adjustment
1 VR502
2
Alignment Point Location on Handset Main PCB and Handset RF PCB
Handset PCB
Handset Unit
Test
Batt Point
(J601)
Connector
Connect the Spectrum Analyzer to test point (J601).
Adjust VR502 so that the power instructions of the Spectrum analyzer reaches
-4.0 dBm.
Then comfirm the frequency is 903.617561 MHz.
Press the "3" key and connect the FM Deviation Meter to test point (J601).
Confirm the deviation is 23 ~ 46 kHz.
5
Spectrum Analyzer FM Deviation Meter
Remarks
Test Point (J601)
RF PCB
VR502
Remove solder