Epson Perfection4180 Photo

EPSON Perfection4180 Photo Revision A
TROUBLESHOOTING Troubleshooting 25
3.2 Troubleshooting
This section explains troubleshooting from the superficial phenomena.
In this section, troubleshooting is divided on a unit level, based on the superficial
phenomena at occurrence of trouble. Refer to Table 3-4, find the corresponding
phenomenon, and make checks according to the flowchart.
Table 3-4. Trouble Phenomena, Causes and Reference Flowcharts
Phenomenon Trouble Definition Cause Location
Reference
Flowchart
If powered ON, the
Main Unit does not
operate.
The Main Unit does not
perform initialization
operation.
• Connector
• Carriage Motor
• Main Board
3-1
The host does not
recognize the scanner if
power is switched on.
• Host's USB support
condition
• TWAIN Driver
•USB Cable
• Main Board
3-2
Occurrence of "Fatal
error".
(The LED flashes red.)
After occurrence of the
above error, recovery
cannot be made if
power is switched on
again.
The Carriage Unit does
not operate.
• Carriage Lock
• Housing Upper
• Connector
•Harness
• Carriage Moving
Mechanism
• Carriage Motor
• Main Board
3-3
The Fluorescent Lamps
are not lit.
• Connector
• Fluorescent Lamps
• Carriage
• Main Board
3-4
Scanned image quality
error
An image cannot be
scanned clearly.
• Smudge on Document
Glass
• Smudge on Mirror
• Sheet White Section
• CCD Board
• Main Board
3-5
The TPU does not
operate.
The TPU does not operate. •Cable
• Main Board
3-6