Epson DFX-9000 Field Repair Guide
3/29/07
Troubleshooting
Printer Component,
Software Item,
LCD Display,
Printer Button
Page 126.
OF: APTC Error
Cause: Could not detect the APTC (Automatic Paper Thickness Control) Home Position.
Action:
1.
Check connectors CNSEN1 and CNSEN2 on the ROM Board for proper seating of the cables.
2.
Test all four (4) windings of the
APTC Motor
with an ohmmeter (
See note below
). Each winding of the
APTC
Motor
should have 365 - 446 ohms of resistance. If the resistance is incorrect, replace the
APTC Unit
.
3.
Test the
APTC Home Position Sensor
. If it does not toggle, replace the
APTC Unit
.
4.
Replace the
ROM Board
.
Note: A weak ohmmeter battery, uncalibrated ohmmeter, and ohmmeter test lead resistance will cause an
inaccurate resistance reading. To obtain an accurate resistance reading, test the APTC Motor as
follows:
1.
Set the ohmmeter on its lowest resistance scale.
2.
Short the ohmmeter test leads together and note the value displayed on the ohmmeter.
3.
Place the ohmmeter test leads across each of the
APTC Motor
windings.
Subtract the value obtained in Step 2 from each of the values displayed in Step 3. The result is the actual resistance
of the
APTC Motor
.
