4.
The necessary voltages are sent to the logic board,
and the startup sequence (stored in ROM on the logic
board) is accessed. The logic board sends startup
instructions to the drive PCB.
5.
The drive PCB accesses the carrier motor. The carrier
motor centers the carrier assembly and moves it back
and forth when printing.
6.
The form-feed switch is released, notifying the main
CPU board that the self-test is to be performed.
7.
The main CPU board notifies the drive PCB that the
self-test is to be performed. The drive PCB notifies the
carrier motor.
8.
The drive PCB takes the self-test information and
sends it to the print head PCB mounted underneath
the carrier assembly.
9.
The print head PCB activates the print head and the
self-test is performed. The printer will continue to run
the self-test until powered off.
ILLUSTRATION NOT AVAILABLE
FIGURE 9
ImageWriter II rev. Aug 87
Basics / 1.
15
