Ladybird I Folder
March 2014
Intro
Service Manual
IV
REFERENCE SYMBOLOGY
Introduction to Reference Symbology
This section describes and defines the various acronyms, abbreviations, reference symbols,
Signal Nomenclature, and AC and DC power specifications. The following is a description
of some of the terms found in this section:
Acronyms
Acronyms are used throughout this service documentation to denote common terminology.
Although some acronyms may be unique to this product, most acronyms used in this
document are known throughout the service industry. Table 1 lists the acronyms that are
found in this service documentation.
Reference Symbols
Reference symbols consist of various icons used in this documentation to denote supportive
data that can be found in other sections of this documentation. The purpose of these symbols
is to inform the Service Representative of procedures, adjustments, or other information that
is important for successful diagnosis and repair.
Schematic Symbols
These symbols represent various electrical and mechanical components or devices that are
commonly found In GERA equipment. These symbols are included as an aid to
understanding the representations used in the Circuit Diagrams (CDs).
AC and DC Voltage References
The expected AC and DC voltage levels found in this machine are defined in this section.
These specifications represent the expected range for AC (machine Input power source) and
DC (machine internal power supplies) voltages that are encountered during normal operation
Abbreviations
Table 2 lists the electrical wire colors that are identified in this service documentation and
reflects the use of standardized abbreviations.
Acronym
Definition
AC Alternating
Current
ACH
Alternating Current High
ACN
Alternating Current Neutral
AMP Ampere
BSD
Block Schematic Diagram
BTU
British Thermal Unit
CD Circuit
Diagram
FQ Folding
Quality
DC Direct
Current
ESD Electrostatic
Discharge
HFSI
High Frequency Service Item
LED
Light Emitting Diode
PL Parts
List
PWB
Printed Wiring Board
RAP
Repair Analysis Procedure
VAC
Volts Alternating Current
VDC
Volts Direct Current
ADJ Adjustment
Table 1 General Acronyms
Abbreviation
Wire Color
BLK black
BLU blue
BRN brown
GRAY gray
GRN green
G/Y
green / yellow
ORN orange
PINK pink
RED red
VIO violet
WHT white
YEL yellow
Y/G
yellow / green
Table 1- 1 Wire Color Abbreviation
