Test Print; What Is Test Print; How To Print - Epson AcuLaser C2800 Service Manual

AcuLaser C2800/C2800D/C3800/C3800D

3.7 Test Print

3.7.1 What is Test Print?

In order to check the engine operation, you can print a test pattern embedded in a
PWBA MCU without activating the controller. If no problem is found during printing
the pattern, the cause of the trouble may be on the main controller (BOARD ASSY,
MAIN) side.

3.7.2 How to Print

1. Remove the two SCREW KNURLINGs that secure the COVER OPTION to the
main unit, and remove the COVER OPTION. (See
2. Load papers in the standard lower paper cassette or in the MP tray, and turn the
power on. Cleaning cycle (process control) will start.
Never touch the energized or driving areas during the cleaning
cycle.
When performing the following step, do not short other circuit
patterns or terminations on the board.
3. Confirm that "Ready" appears on the LCD panel after the cleaning cycle is
completed, short the unmounted circuit pattern R686 (just below CN601) on the
BOARD ASSY, MAIN with a blade of a flatblade mini screwdriver. See
3-7 (p.154).
TROUBLESHOOTING
Figure 3-6 (p.154).)
Figure
Test Print
.
SCREW
KNURLINGs
Figure 3-6. Removing COVER OPTION
Figure 3-7. BOARD ASSY, MAIN Short Circuit location
Revision C
COVER OPTION
R686 CN601
154
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