Sangean MMR-77, Service Manual

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1. ALIGNMENT FOR AM IF
a. Required Instrument
AM IF Sweep Generator with Scope
b. Alignment Procedure
Mode Adjustment Procedure
(1) Set the power switch to ON position.
(2) Connect the input terminal of the AM IF sweep generator in series with a 10uF
capacitor to the IC1 pin24.
(3) Connect the RF output terminal of the AM IF sweep generator in series with a
capacitor 0.01uF capacitor to the IC1 pin11.
(4) Adjust T1 to have a maximum output with a marker frequency of 455KHz on the
AM T1
sweep scope.
c. Instrument Connection
T1
IC1 pin11
OUT IN
455KHz Marker
IC1 pin24
AM IF Sweep Generator
10uF 0.01uF
ALIGNMENT INSTRUCTIONS
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