Toshiba FT-8808, Service Manual

Page: 7 / 67

Alignment Procedure
Step Preset to Adjustment Remarks
1
SG: 1mV
No modulation
L212
(Discriminator
Voltage)
Press the “PAGE” key for 3 times to enter the TEST Mode 4. Connect the
RF Signal Generator to the RF test point on the Base RF PCB. Make sure
that the frequency is 902.984676 MHz.
Connect the DC Voltmeter to the J1 AF test point. Adjust L212 to indicate
DC 0.85 V.
2
SG: 1 mV
1 kHz
±
8kHz
deviation
RT1
(RX AF
Voltage)
Connect the RF Signal Generator to the RF test point on the Base RF
PCB. Make sure that the frequency is 902.984676 MHz.
Connect the AC Voltmeter across a 600-ohm dummy to the Telephone
Line Jack. Adjust RT1 for a 195 mV reading on the AC voltmeter.
3
SG:
−
6.5 dB
µ
V
No modulation
VR201
(SQ Point)
Press the “PAGE” key to enter the TEST Mode 5. Make sure that the
frequency of RF SG output is 902.984676 MHz. Adjust VR201 to turn to
the point where the CHG LED just turns on.
RF SG
-
+
RF
Test Point
BASE RF PCB
J3
TEL Line
Jack
BASE MAIN PCB
AC Adapter
AC 120V
60Hz
-
+
Dummy Load
(600-ohm)
AC Voltmeter
J1
AF Terminal
DC Voltmeter
J2
DC IN
9V Jack
DC 9V
Receiver Section
Connection
Alignment Point Location on Handset Main PCB and Handset RF PCB
Preset
Place the Base unit in VCO/TX FREQ. ADJ mode in accordance with the procedure on page 3.
J3
TEL LINE Jack
Base Main PCB
J2
DC IN 9V Jack
S2
T/P Switch
T
P
RT1
J201
RF TEST POINT
Base RF PCB
AF TEST POINT
J202
VR201
L212