4–2
FM30/FM100/FM250 User's Manual
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4.1 Part Numbering
As this section refers to individual components, you should be familiar with the
part numbering scheme used. Although parts on the various circuit boards and
circuit board drawings may be marked with identical reference numbers, each
component in the transmitter has a unique part reference number.
The circuit boards and component placement drawings use designators such as
“R1”, “R2”, and “C1.” These numbers represent only a portion of the full part
numbers (as shown on the schematic). To find the full number, refer to the chart
below. R401, for instance, is marked “R1” on the Metering board and on its
component placement drawing.
Circuit Name Part numbers
Audio Processor 0-199
Stereo Generator 200’s
RF Exciter/Synthesizer 300’s
Metering/Protection 400’s
Motherboard 500’s
Display 600’s
Voltage Regulator 700’s
Power Regulator 800’s
RF Predriver 900’s
Chassis Wiring 1000's
RF Power Amplifier 1100's
RF Low-Pass Filter 1200's
Illustration 4–1 Component Part Numbering
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