Epson C1100 - AcuLaser Color Laser Printer, Service Manual

Page: 274 / 565

EPSON AcuLaser C1100 Revision B
TROUBLESHOOTING Test Print 274
3.6 Test Print
3.6.1 Overview
To check the IOT operation, it is possible to print PWBA MCU built-in sample
continuously without being routed through the controller. If the problem does
not occur on the PWBA MCU built-in sample, the cause of the problem may be
controller.
3.6.2 Printing Procedure of Test Print Pattern
1. Remove the COVER ASSY LH. (p.295)
2. Set paper into MSI and turn the power on.
3. In Ready mode, short-circuit the pad for test print on the PWBA MCU with
a small screwdriver or a similar tool. The pad is located at upper right of
the interface connector (P411).
Figure 3-5. Printing Test print Pattern
W A R N I N G
Never touch the energized or driving part when performing the
following procedure.
W A R N I N G
When short-circuiting the pad, be careful not to contact the other
elements by hand or tool.
C A U T I O N
„
1 sheet of test print is printed out by 1 time of short-circuiting.
„
It cannot be printed when the engine is in error status.
„
As for Ready mode, refer to “2.7 Operating Modes” (p.109)
Leg_Sec002_003EB
PWBA MCU