Troubleshooting Electrical Problems; Troubleshooting I/F-Related Problems - Epson Artisan 810 Service Manual

Epson Artisan 810/835/837/710/725/730/Epson Stylus Photo PX810FW/TX810FW/PX820FWD/TX820FWD/PX830FWD/PX710W/TX710W/PX720WD/TX720WD/PX730WD/TX730WD

3.4.2 Troubleshooting Electrical Problems

Check the points described in the table below when the printer does not operate at all (LED does not light) at power-on.
Problem
Power code failure
Incorrect AC power supply
Poor connection of the connectors
The fuse is blown
Abnormal output of the Power Supply Board

3.4.3 Troubleshooting I/F-related Problems

This section provides information for troubleshooting problems related to the USB interfaces and the Memory Card Slot.
USB Interface Error
Problem
Incorrect printer driver installation
USB cable failure
Poor connection
Main board failure
Card board failure
TROUBLESHOOTING
Table 3-23. Troubleshooting Power Supply Problems
Check Point
Replace the power code with another one, and check
whether the printer is normally powered or not.
Does the AC power source match with the requirement of
the printer?
Is the Power Supply Unit Cable properly connected to
CN501 connector on the Main Board?
Is the fuse (F1) on the Power Supply Board blown?
Is a normal voltage being output from the Power Supply
Board? (See Table 3-3.)
Table 3-24. USB I/F Error
Check Point
Click My Computer - Property - Device Manager on
Windows computer. Is the printer driver is included in the
Other Devices by mistake?
Replace the cable with another one. Does the problem still
occur?
Is the USB terminal free from foreign materials?
Check the Main Board for any damage.
Check the STG Board for any damage.
Troubleshooting without Error Message
Remedy
Replace the power code with a new one.
Use the correct power source.
Connect the cable correctly.
Replace the Power Supply Board.
Replace the Main Board when the output voltage is normal.
Replace the Power Supply Unit when the output voltage is
abnormal.
Remedy
Uninstall the driver and reinstall it correctly referring to the
Users Guide.
Replace the USB cable.
Remove the foreign material, and clean the contact points.
Replace the Main Board.
Replace the STG Board.
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