Epson LX-300+II RTP Service Manual page 62

EPSON LX-300+II/300+II RTP/1170II
Table 3-9. Printing Operation is Abnormal When it is On-Line.
(Self-Test is Normal.)
Cause Check Point
Check the initial
Initial setting is setting with the
wrong. default setting. Is it
OK?
Interface cable is
Are cables connected
not connected
properly?
properly.
Interface cable is
-
defective.
Main board is
-
defective.
Firmware is Is the firmware
defective. version latest?
Troubleshooting
Y/N Solution
Reset the setting or use the EEPROM
NO
clear to reset setting to the default.
NO Connect them properly.
- Replace the interface cable.
- Replace the main board.
NO Update the firmware.
Troubleshooting
Table 3-10. Electrical Noise is Caused.
Cause Check Point
Is there another
electrical apparatus,
such as a generator,
External noise radio transmitter or an
apparatus incorporating
a motor within 3 m
from the printer?
Is the AC power cable
AC cable is not
connected and ground
connected properly
properly?
Harness of power Is the harness of the
switch is not grounded power switch grounded
properly properly?
Is the circuit board
Circuit board is not
connected and
grounded properly
grounded properly?
Power supply board is Is the power supply
defective board normal?
Main board is Is the main board
defective normal?
Revision D
Y/N Solution
Turn off the power to the electrical
apparatus or move the printer to a
YES
position at least 6m distant from the
apparatus.
Connect and ground the cable
NO
properly.
NO Ground the harness properly.
Ground and connect the circuit
NO
board properly.
NO Replace the power supply board.
NO Replace the main board.
62