Epson Elp-3500, Service Manual, Page: 79 / 114

EPSON ELP-3500 Service Manual
4-2
4.2 First Action
Follow the flowchart below before starting to troubleshoot projector problems, and
proceed to the pertinent detailed flowchart (given on the next and subsequent pages).
Figure 4-1.
If you cannot isolate
problem, can you
reproduce error?
Replace the part
using the
instructions in
Chapter 3.
Is there a cosmetic
problem, such as case,
handle, or projector lens?
START
No
Yes
RS-232C interface
problem?
Remote control
problem?
Projection image quality
problem?
Host computer or video
audio problem?
Host computer or video
display problem?
Light source lamp or test
screen display problem?
LED display or fan
(heat/exhaust) problem?
Go to “Display
Mode.”
Go to “Image
Quality.”
Go to “Audio
Mode.”
Go to “Video
Display Mode.”
Go to “System
Initialization.”
Go to RS-232C
Control.
Go to “Remote
Control.”
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
Yes
* Check the operating
environment
(temperature and
condensation) and AC
input power.
* Try to replace input
devices (host computer
and video equipment)
and their cables.
* The problem may be
attributable to static
electricity. Check to
ensure that power cords
to the projector and input
devices are grounded
properly.
* Reconnect the interface
cables and internal
cables.
* If the problem still
persists, try replacing the
main board, driver board,
and interface unit.
Ensure cables are
connected correctly for
interface and internal
cables. Reconnect cable
if necessary.