Serial Port, Parallel Port, Usb Port, And Keyboard/Mouse Port Faults - Epson MR Series Technical Reference Manual

❏ If the printer unit is still not able to print, the cause may be a faulty connection or a problem
with an individual unit or the connector itself. Follow the procedures below.
1. Confirm whether replacing the printer unit solves the problem.
2. Refer to the relevant technical manuals and service manuals for the printer in question.
Deterioration in Print Quality
❏ Refer to the relevant technical manuals and service manuals for the printer in question.

Serial Port, Parallel Port, USB Port, and Keyboard/Mouse Port Faults

Connected Device Fails to Operate
❏ Follow the procedures below.
1. Confirm that the peripheral device connections are correct.
2. Confirm whether the power for the peripheral devices is on.
• The power for the USB bus can supply 500mA per port. Confirm how much current
should be necessary for each USB device.
3. Confirm the BIOS setting.
4. For problems with the USB device, confirm that the setting of the USB Controller in
the Integrated Peripherals Menu is set to Enabled.
• USB devices are supported only in Windows 98/2000/XP. The USB keyboard and
USB mouse are also supported in Windows NT and DOS.
• You need to confirm whether the USB Keyboard/Mouse Support in the BIOS is set
to Disabled, because there is a possibility for the system to cause a keyboard fault if
the system includes a DM-M820 with a MSR.
5. Confirm that the driver for COM3 or 4 is installed. (If the driver is not installed, install
the driver.)
❏ Check whether the device is able to operate. If the device still fails to operate, the cause may
be a faulty connection or a problem with an individual unit or the connector itself. Follow
the procedures below.
1. Replace the various devices one at a time and operate the system to determine the source
of the fault.
• Perform an operational check for the devices connected to the IM-800 by using the
device diagnostics utility. (Refer to Chapter 5.)
2. For problems with the front USB port, confirm whether replacing the USB cable solves
the problem.
3. Replace the cable (Reference No. 119) for the DM-M820.
4. For problems with the keyboard, replace the DM-M820.
Rev. I
MR Series Technical Reference Manual
Troubleshooting 8-15