Epson EMP-S4 - Page 55

3-7
EMP-S4
SEIKO EPSON Revision:B
Remedy For Power Supply Problems
1. Determine whether the problem is being caused by components inside the power supply
unit, or whether it is being caused by some external factor. To determine this, check factors
such as output voltage, internal temperature, appearance of components, odors and smoke.
2. If the cause is judged to be an internal problem, replace the power supply unit. If the newly-
replaced power supply unit also has a problem and the symptoms are the same as before,
then the cause of the problem is probably some external factor. Eliminate the external factor
that is causing the problem.
3. If the power supply unit is recoverable but is not working properly, for example if high tem-
peratures are causing the thermostat to shut down the power supply, or if the overcurrent
protection circuit has tripped, then there is no need to replace the power supply unit.
4. If the power supply unit is not recoverable and is not working properly, for example if an
overcurrent has repeatedly blown the fuse, replace the power supply unit.
No
No
No
Ye s
Ye s
Ye s
A
(Continued from previous page)
Is the lamp turned on?
Press the [Power] button
to turn the power off.
Does the indicator
flash orange?
Does the indicator
light orange after it flashes
for approx. 2 seconds?
Image Display and Quality
Replace the Optical Engine
and MA Board.
Replace the Optical Engine
and MA Board.
Replace the Optical Engine
and MA Board.