Sangean MMR-77, Service Manual

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2. ALIGNMENT FOR FM FREQUENCY RANGE
a. Required Instruments
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) With the tuning gang fully closed, set signal generator to 87.5MHz±0.5MHz
and adjust L3 ( stretch or squeeze) for maximum reading on SSVM.
(6) With the tuning gang fully open, set signal generator to 108MHz±0.5MHz,
adjust TC3 for maximum reading on the SSVM.
FM
L3
TC3
(7) Repeat steps (5) and (6) until best sensitivity is obtained at both frequencies.
c. Instrument Connection
TC3
L3
TP1
Signal Generator
TP3
TP4
SSVM
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