Specifications

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• Electrical Trouble Shooting Users Manual Model 686 / 686 HT
Electrical Trouble Shooting
Power Up / Sign On / Communications
Problem Probable Cause Corrective Action
Printer fails to power up. 1) Incorrect AC power supplied to
printer.
1) Confirm that the AC entry is configured for the
line voltage intended to be applied to the printer.
Failure to do so can damage the printer's internal
power supply (refer to the Fuse Configuration
section in this manual).
2) Lack of power to printer. 1) Check that both ends of the power cord are
plugged in securely.
2) Confirm that the outlet the printer is plugged
into has power.
3) Missing or blown fuse(s) 1) Check that the fuse(s) located inside the AC
entry are present and intact. Replace as needed
(refer to the Fuse Configuration section in this
manual).
4) Cable / connector inside printer
not properly seated or
disconnected.
1) Power off and remove the power cord from the
AC entry. Remove the back cover and inspect
the cables and connectors to and from the power
supplies (refer to the Electrical System
Schematic in this manual).
5) Thermal Control Board
unplugged from the Mother Board
1) Power off and remove the power cord from the
AC entry. Remove the back cover and reseat the
Thermal Control Board.
Front panel displays no text
or nothing at all.
1) Front panel cable unplugged. 1) Power off and remove the power cord from the
AC entry. Remove the back cover and inspect
the cable and connectors to and from the front
panel (refer to the Electrical System Schematic
section in this manual).