12-2 magicolor 330 - Base Engine Service Manual

Wiring Diagrams and Signal Information

Wiring Diagram Notations

This section of the manual contains a Master Wiring Diagram for the Qms Magicolor 330 laser printer. The Master

Wiring Diagram shows the interconnections of the major subsystems within the printer. The remainder of this section

divides the Master Wiring Diagram into thirteen individual block diagrams (BD) to better illustrate the electrical rela-

tionships between components and assemblies within the printer. Each wire in the diagrams is tagged with a signal

name and each wire is terminated at both ends with a pin number.

The wiring diagrams presented in this manual use the following circuit notations to describe components and signal

paths within the printer.

Plug/Jack XX
is a male connector (plug) of P/J xx
is a female connector (jack) of P/J xx
Component name
Section 14 Parts List location number
P/J XX
1
2
FUSER ASSY
PL9.1.1
Relay Component or sub-assembly within a larger assembly
Wire connection
Frame ground wire fastened with a screw to the printer frame
ADiagram simplification; wire continues at another point within
the same Block Diagram.
ADiagram simplification; wire continues at another point within
a different Block Diagram.
HEATER ON (L) 5VDC
Metallic contact, such as a spring, with direction of signal flow.
RS1420XB
FG or
Frame ground
Signal ground
SG or
AG Analog ground
RTN Signal return
83,
Diagram simplification; connector is continued on the
indicated Block Diagrams
Wire with signal name and direction of signal flow.
In some cases, such as a signal name of 5VDC, the signal is
a steady flow of approximately 5VDC.
In other cases, such as a signal name
HEATER ON (L) 5VDC, the signal is near 5VDC when off and
near 0VDC when on. Or in the case of the signal name
HEATER ON (H) 5VDC, the signal is near 5VDC when on and
near 0VDC when off.