Toshiba FD-9839 Service Manual page 8

Receiver Section
Connections
Preset
1) Remove the solder on the pattern (refer to the illust. below).
2) Connect DC power supply to battery connector on the handset unit.
3) Turn the DC power supply ON while pressing " ∗ ∗ ∗ ∗ ∗ " and " # " keys, and keep pressing the keys continuously for
approximate 2 seconds.
4) Release keys when entering TEST mode 1 with beep.
Alignment Procedure
step Preset to Adjustment
SG: 1mV
1 (Discriminator
No modulation
Alignment Point Location on Handset Main PCB and Handset RF PCB
Handset PCB
RF SG
DC Power Supply
Connector
DC 3.8V
Press the "4" key to enter the TEST Mode 4. Connect the RF Signal
L603 Generator to the test point (J601) on the handset MAIN PCB. Make sure
that the frequency is 926.495220 MHz.
Voltage) Connect the DC Voltmeter to the Discriminator test point. Adjust L603 to
indicate DC 0.90 V.
Discriminator Test Point
HANDSET Unit
Test Point
-
(J601)
+
Battery Discriminator
Test Point
Remarks
RF PCB
L603
6
DC Voltmeter
Test Point (J601)
Remove solder