Epson GT-30000 Service Manual

A3 Size Color Flat Bed Scanner GT-30000 Revision A
TROUBLESHOOTING Overview 32
MOTORS
Condition: Disconnect from the connector and measure with the cable
connected to the motor.
SENSORS
Condition: Test the sensors with the power on.
3.1.2.2 Troubleshooting Other Errors
See the table below for miscellaneous errors not covered in the previous sections.
See subsequent pages for troubleshooting specific to each problem with major
units above.
Table 3-5. Motor Check Points
Motor Test Point Signal Level
Motor (for driving the
mirror)
<Cable connector>
Between Pins 1 and 3
Between Pins 1 and 4
Between Pins 2 and 5
Between Pins 2 and 6
Approximately 0.56
Ω
Table 3-6. Sensor Check Points
Motor Test Point Signal Level
HP sensor (Mirror)
<PBA-CONNECT board>
CN1: Pin 7 (Signal)
Pin 6 (GND)
 H: Mirror unit is in the home
position.
 L: Mirror unit is outside its
home position.
Open sensor
<PBA-CONNECT board>
CN4: Pin 2 (Signal)
Pin 1 (GND)
 H: Cover closed
 L: Cover open
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sensor 1
<PBA-CONNECT board>
CN10: Pin 6 (Signal)
Pin 4 (GND)
 H: Document not present
 L: Document present
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sensor 2
<PBA-CONNECT board>
CN10: Pin 3 (Signal)
Pin 1 (GND)
 H: Document not present
 L: Document present
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sensor 3
<PBA-CONNECT board>
CN10: Pin 9 (Signal)
Pin 7 (GND)
 H: Document not present
 L: Document present
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sensor 4
<PBA-CONNECT board>
CN9: Pin 3 (Signal)
Pin 1 (GND)
 H: Document not present
 L: Document present
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sensor 5
<PBA-CONNECT board>
CN9: Pin 9 (Signal)
Pin 7 (GND)
 H: Document not present
 L: Document present
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sensor 6
<PBA-CONNECT board>
CN9: Pin 6 (Signal)
Pin 4 (GND)
 H: Document not present
 L: Document present
C A U T I O N
Be careful not to short-circuit the signals while
checking them.
Table 3-7. In case of abnormal performance
Phenomenon Description Refer to Flowchart
The scanner doesnt
operate at power on.
READY LED does not light. Flowchart 3-1
Fatal Error is indicated
and does not clear after
the scanner is turned off
and back on
CR does not move. Flowchart 3-2
Abnormal movement of CR, such
as crashing into the frame.
Flowchart 3-3
Lamp does not light. Flowchart 3-4
Communication Error is
indicated
SCSI not set properly or
defective
Flowchart 3-5
The scanner does not scan
images properly.
Black lines, White banding, and
so on
Flowchart 3-6
Table 3-6. Sensor Check Points
Motor Test Point Signal Level

Epson GT-30000 Specifications

Power

voltage	AC 100V-120V, 220V-240V
frequency	50-60Hz
power consumption operating without ADF	65W
power consumption operating with ADF	90W
power consumption standby without optional unit	12W

Operating Environment

temperature operating	41ºF to 95ºF (5ºC to 35ºC)
humidity operating	10% to 80% (no condensation)
humidity storage	10% to 85% (no condensation)

Scanning Specifications

optical resolution	600 x 1200 dpi with Micro Step Drive™ technology
maximum resolution	9600 x 9600 dpi with interpolation
effective pixels	7020 x 10200 pixels (600 dpi)
color depth internal	36 bits per pixel
color depth external	24 bits per pixel (selectable)
grayscale depth internal/external	12 bits per pixel
grayscale depth external	8 bits per pixel
scanning speed at 1600 dpi, draft mode, color	0.79 msec/line (approx.)
scanning speed at 1600 dpi, draft mode, grayscale	0.39 msec/line (approx.)
scanning speed at 1600 dpi, draft mode, art	0.39 msec/line (approx.)

Weight and Dimensions

maximum read area	11.7" x 17.0" (297mm x 432mm)
width	25.9" (658mm)
depth	19.2" (488mm)
height	10.0" (254mm)
weight	66 lb (37.5 kg approx.)