fault block on the troubleshooting flow-
of all replaceable piece parts in the amplifier-converter.
charts calls out "Switch Q1 Fault," the
The component location diagrams provide component
schematic is used to identify the compo-
location information only; for ordering of piece parts
nents associated with Q1 (ie, capaci-
refer to the Repair Parts and Special Tools List. There
tors, resistors, inductors, etc). The
a separate diagram for the amplifier-converter and each
schematics contain pertinent voltage and
circuit card and the cable assemblies. Each component
waveform data to aid in fault isolation.
location illustration is supported by a parts list with two
columns of data, as follows:
Component Location Diagrams. The
component location diagrams for each
unit under test are used for three
ITEM Column. Item numbers are
a. To identify the location of all
assigned in numerical sequence, starting
components in disassembly and reassembly
with 1, which correspond to the item
numbers on the component location illus-
trations for each component. Numbers
b. To identify the location of the
are assigned clockwise, starting at the
test points and pins required in the
top of the illustration. For circuit
performance test and troubleshooting
card assemblies, the actual reference
designator is used instead of a sequence
number; the sequence is again clockwise,
c. To identity the location of
starting at the top.
every replaceable component.
2. DESCRIPTION Column.
DESCRIPTION OF COMPONENT LOCATION
short name or description of each com-
ponent. May also contain reference
The component location dia-
grams provide physical identification
designator number where necessary.