Chapter 8 407
IF Section
Introduction
Low-Pass Filter ................................................................. page 459
Sweep Generator............................................................... page 460
AM/FM Demodulation, Audio Amplifier, and Speaker ... page 460
NOTE Because the cal oscillator circuitry on the A4 assembly is such an
integral part of the IF adjustment, always check this assembly first,
before checking the rest of the IF Section. A faulty cal oscillator can
cause many apparent "faults" in the rest of the IF Section.
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