Toshiba FT-8808, Service Manual

Page: 8 / 67

Handset Unit
Transmitter Section
Connection
Preset
Place the Handset in VCO/TX FREQ. ADJ mode in accordance with the procedure on page 4.
Alignment Procedure
Step Adjustment Remarks
1
VR502
(TX Power)
Connect the RF power Meter to the RF test point on the handset RF PCB.
Adjust VR502 for a
−
7 dBm reading on the Power Meter.
2
CT501
(TX Frequency)
Connect the Frequency Counter to the RF test point on the handset RF
PCB. Adjust CT 501 to make sure that the frequency is 903.085147 MHz.
3
VR601
(TX Modulation)
Press the “2” key to enter the TEST Mode 2. Connect the AF Generator to
the MIC Connector. Make sure that the output is 1 kHz 10.5 mV from the AF
Generator.
Connect the Deviation Meter to the RF test point on the handset RF PCB.
Adjust VR601 to indicate
±
8kHz Dev.
Alignment Point Location on Handset Main PCB and Handset RF PCB
Power
Meter
Frequency
Counter
Deviation
Meter
RF
Test Point
RF
Test Point
HANDSET RF PCB
RF
Test Point
MIC + Pin
1kHz 10.5mV
Battery
Terminals
HANDSET MAIN PCB
DC Power Supply
DC 3.8V
AF GEN.
Handset Main PCB
RF PCB
RF TEST POINT
MIC + Pin
MC601
VR601
CT501
J501
VR502