Epson MR Series Technical Reference Manual page 208

4. Confirm that the power consumption for the PCI slots, COM ports, keyboard/mouse
port, and USB port conform to the specifications in the table below.
Power supply
+ 5 VDC
+ 3.3 VDC
+ 12 VDC
– 12 VDC
+24 VDC
The individual ports possess the capacity limits in the table below.
Port
COM port
USB port
Keyboard and mouse
5. Test using the procedures described in the section, "Possible Short in System," on page
8-17.
6. Test using the procedures described in the section, "System Halts on Intermittent Basis,"
on page 8-16.
Unable to Switch Off Power Supply
❏ Follow the procedures below.
1. Confirm whether the power supply switches off after the power switch is pressed for a
period of 4 or more seconds.
2. Confirm whether replacing the switch cable assembly solves the problem.
3. Proceed to section, "Procedures for Testing the Power Supply," on page 8-23, and test
the power supply.
4. Confirm whether replacing the main circuit board solves the problem.
8-18 Troubleshooting
Application
PCI slot, COM ports, keyboard/mouse, USB
PCI slot
PCI slot, COM ports
PCI slot
TM printer
Power supply Supply capacity
+ 5 VDC 500 mA each (peak 1A/100
ms)
+ 12 VDC 500 mA each (peak 1A/100
ms)
+ 5 VDC 500 mA each (peak 1A/
100ms)
+ 5 VDC 500 mA each (peak 1A/
100ms)
Capacity
2.0 A
1.0 A
1.0 A
0.02 A
2 A
Stipulations
Total current and + 5 VDC
and + 12 VDC must not
exceed the value shown at
left.
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—
Rev. I