Epson EH-TW2900 Service Manual page 31

EH-TW3500/4500/5500
TROUBLESHOOTING FROM THE ERROR CODE ON ELECTRIC CIRCUIT ERRORS
Error code/error name
RA Internal error RAM
RO Internal error ROM
II Internal error I2C
ID Internal error DR Status
RA Sub system PW Error
Sub system ROM Error
RS
Replace MA Board.
SEIKO EPSON
Faulty part/part name
RAM becomes abnormal.
MA Board MA Board is broken.
Flash ROM becomes abnormal.
Instability of the input AC Power
Input AC power supply.
Supply. (an external factor)
Environment (Temperature
Access timing error (occurs in a low
of the customer's operating
temperature environment (Y43series))
environment)
MA Board MA Board is broken.
Sub System (Electric Circuit
Sub System becomes abnormal.
other than MA Board)
Troubleshooting
Cause
Replace the Optical Engine and MAB set.
If not appropriate, request the improvement.
If not appropriate, request the improvement.
Replace the Optical Engine and MAB set.
MA Board
Optical Engine
31
CONFIDENTIAL
Remedy
• "3.3.8 Removing the MA Board
(assembly) (p68)"
• "3.3.9 Removing the Optical
Engine (assembly) (p75)"
Reference
Revision A