Epson LX-300+ Service Manual page 65

LX-300+/1170
Table 3-6. Self Test Print is Abnormal.
Cause Check Point
Ribbon mechanism is Is ribbon advanced
defective. properly?
Printer mechanism is
-
defective.
Table 3-7. Paper Feed is Abnormal.
Cause Check Point
RPE detector or BPE
Check the sensors.
detector is defective or
Is there any
not connected
abnormality?
properly.
Switch the release
lever. Is the paper
Paper switching
loading direction
mechanism is
switched?
defective.
Can the release lever
be switched?
When the power is
Printer mechanism
off, can the printer
paper loading
feed paper by
mechanism is
rotating the platen
defective.
knob manually?
PF motor is defective. Is PF motor normal?
PF motor driver is
-
defective.
Table 3-8. Control Panel and Switches Do Not Operate.
Cause Check Point
Is conductivity of
Switch is defective.
the switch is OK?
Control panel
Connect the control
harness is connected
panel harness.
properly?
Control panel board is
defective or the -
harness is defective.
Troubleshooting
Y/N Solution
NO Replace the ribbon mechanism parts.
- Replace the printer mechanism.
Y/N Solution
NO Replace the sensor.
Check the connection to the main
YES
board.
Replace the printer mechanism or
NO
check the connection.
Replace the release sensor or
NO
check the connection.
Replace the printer mechanism or
NO
paper loading mechanism parts.
NO Replace the PF motor.
- Replace the main board.
Y/N Solution
NO Replace the control panel.
NO Connect it properly.
- Replace the control panel.
Troubleshooting
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?
Revision C
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 Replace the firmware.
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