Sangean MMR-77, Service Manual

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3. ALIGNMENT FOR FM SENSITIVITY
a. Required Instrument
FM RF signal generator
SSVM
b. Alignment Procedure
Mode Adjustment Procedure
(1) Set the power switch to ON position.
(2) Connect a SSVM to the AF out (TP3 and TP4).
(3) Connect the FM signal generator to the input terminal of TP1.
(4) Set frequency of the signal generator to the standard FM band, with
frequency deviation to 22.5KHz, 1KHz modulation.
(5) Set signal generator to 90MHz and adjust L2 (stretch or squeeze) for
maximum reading on SSVM.
(6) Set signal generator to 106MHz and adjust TC2 (stretch or squeeze) for
maximum reading on SSVM.
FM
L2
TC2
(7) Repeat steps (5) and (6) until best sensitivity is obtained at both frequencies.
c. Instrument Connection
L2
TC2
TP1
Signal Generator
TP3
TP4
SSVM
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