Sangean U3 Service Manual page 10

5. ALIGNMENT FOR FM TUNING SENSITIVITY
a. Required Instruments
FM Signal Generator (frequency range up to 220 MHz)
SSVM
b. Alignment Procedure
Mode Adjustment
TC1
FM
L1
c. Instrument Connection
TP1
TP2
(1) Turn on radio.
(2) Connect a SSVM to speaker TP8 and TP9.
(3) Connect a FM signal generator to TP2 and TP1.
(4) Set the signal generator to 22.5 kHz deviation with 1 kHz modulation.
(5) Always tune the generator frequency to exactly same as the radio band frequency
before adjustment.
(6) Tune the FM frequency to 106MHz and adjust TC1to have a max audio output.
(7) Tune the FM frequency to 90MHz and adjust L1 to have a max audio output.
(8) Repeat (6) to (7) as necessary to minimize tracking error.
SSG
10
Procedure
L1 TC1
TP8
TP9
DVM